<?xml version="1.0" encoding="us-ascii"?>
<!-- RRD ActiveDisclosure(SM) XBRL Schema Document - http://www.financial.rrd.com/ -->
<!-- Creation Date      : 2016-05-29T16:18:18.4918859+00:00 -->
<!-- Version            : 2.3.0.3 -->
<!-- Package ID         : A00CF5559F94CEF90CBB6B81129C9FE5-0000880807-001602 -->
<!-- Copyright (c) 2016 R. R. Donnelley & Sons Company. All Rights Reserved. -->
<schema xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:us-types="http://fasb.org/us-types/2015-01-31" xmlns:stpr="http://xbrl.sec.gov/stpr/2011-01-31" xmlns:naics="http://xbrl.sec.gov/naics/2011-01-31" xmlns:sic="http://xbrl.sec.gov/sic/2011-01-31" xmlns:invest="http://xbrl.sec.gov/invest/2013-01-31" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:us-gaap="http://fasb.org/us-gaap/2015-01-31" xmlns:dei="http://xbrl.sec.gov/dei/2014-01-31" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:country="http://xbrl.sec.gov/country/2013-01-31" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:amsc="http://www.amsc.com/20160331" xmlns:currency="http://xbrl.sec.gov/currency/2014-01-31" xmlns:exch="http://xbrl.sec.gov/exch/2015-01-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.amsc.com/20160331" xmlns="http://www.w3.org/2001/XMLSchema">
  <import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance" />
  <import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase" />
  <import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt" />
  <import schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/numeric" />
  <import schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd" namespace="http://www.xbrl.org/dtr/type/non-numeric" />
  <import schemaLocation="http://xbrl.fasb.org/us-gaap/2015/elts/us-types-2015-01-31.xsd" namespace="http://fasb.org/us-types/2015-01-31" />
  <import schemaLocation="http://xbrl.fasb.org/us-gaap/2015/elts/us-gaap-2015-01-31.xsd" namespace="http://fasb.org/us-gaap/2015-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/dei/2014/dei-2014-01-31.xsd" namespace="http://xbrl.sec.gov/dei/2014-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/country/2013/country-2013-01-31.xsd" namespace="http://xbrl.sec.gov/country/2013-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/currency/2014/currency-2014-01-31.xsd" namespace="http://xbrl.sec.gov/currency/2014-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/exch/2015/exch-2015-01-31.xsd" namespace="http://xbrl.sec.gov/exch/2015-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/invest/2013/invest-2013-01-31.xsd" namespace="http://xbrl.sec.gov/invest/2013-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/naics/2011/naics-2011-01-31.xsd" namespace="http://xbrl.sec.gov/naics/2011-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/sic/2011/sic-2011-01-31.xsd" namespace="http://xbrl.sec.gov/sic/2011-01-31" />
  <import schemaLocation="http://xbrl.sec.gov/stpr/2011/stpr-2011-01-31.xsd" namespace="http://xbrl.sec.gov/stpr/2011-01-31" />
  <annotation>
    <appinfo>
      <link:roleType id="TemplateLink" roleURI="http://www.amsc.com/20160331/role/TemplateLink" xmlns:link="http://www.xbrl.org/2003/linkbase">
        <link:definition>00000 - Document - Template Link</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="amsc-20160331_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:title="Calculation Links, all" xlink:type="simple" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="amsc-20160331_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:title="Definition Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="amsc-20160331_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:title="Label Links, all" xlink:type="simple" />
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="amsc-20160331_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:title="Presentation Links, all" xlink:type="simple" />
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DocumentDocumentAndEntityInformation" id="Role_DocumentDocumentAndEntityInformation">
        <link:definition>100000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/StatementConsolidatedBalanceSheets" id="Role_StatementConsolidatedBalanceSheets">
        <link:definition>100010 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/StatementConsolidatedBalanceSheetsParenthetical" id="Role_StatementConsolidatedBalanceSheetsParenthetical">
        <link:definition>100020 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/StatementConsolidatedStatementsOfOperations" id="Role_StatementConsolidatedStatementsOfOperations">
        <link:definition>100030 - Statement - Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/StatementConsolidatedStatementsOfComprehensiveLoss" id="Role_StatementConsolidatedStatementsOfComprehensiveLoss">
        <link:definition>100040 - Statement - Consolidated Statements of Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/StatementConsolidatedStatementsOfStockholdersEquity" id="Role_StatementConsolidatedStatementsOfStockholdersEquity">
        <link:definition>100050 - Statement - Consolidated Statements of Stockholders&apos; Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" id="Role_StatementConsolidatedStatementsOfCashFlows">
        <link:definition>100060 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureNatureOfBusinessAndOperationsAndLiquidity" id="Role_DisclosureNatureOfBusinessAndOperationsAndLiquidity">
        <link:definition>100070 - Disclosure - Nature of the Business and Operations and Liquidity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies" id="Role_DisclosureSummaryOfSignificantAccountingPolicies">
        <link:definition>100080 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureFairValueMeasurements" id="Role_DisclosureFairValueMeasurements">
        <link:definition>100090 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsReceivable" id="Role_DisclosureAccountsReceivable">
        <link:definition>100100 - Disclosure - Accounts Receivable</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureInventory" id="Role_DisclosureInventory">
        <link:definition>100110 - Disclosure - Inventory</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosurePropertyPlantAndEquipment" id="Role_DisclosurePropertyPlantAndEquipment">
        <link:definition>100120 - Disclosure - Property, Plant and Equipment</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssets" id="Role_DisclosureIntangibleAssets">
        <link:definition>100130 - Disclosure - Intangible Assets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsPayableAndAccruedExpenses" id="Role_DisclosureAccountsPayableAndAccruedExpenses">
        <link:definition>100140 - Disclosure - Accounts Payable and Accrued Expenses</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureDebt" id="Role_DisclosureDebt">
        <link:definition>100150 - Disclosure - Debt</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureWarrantsAndDerivativeLiabilities" id="Role_DisclosureWarrantsAndDerivativeLiabilities">
        <link:definition>100160 - Disclosure - Warrants and Derivative Liabilities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxes" id="Role_DisclosureIncomeTaxes">
        <link:definition>100170 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquity" id="Role_DisclosureStockholdersEquity">
        <link:definition>100180 - Disclosure - Stockholders&apos; Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureCommitmentsAndContingencies" id="Role_DisclosureCommitmentsAndContingencies">
        <link:definition>100190 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureEmployeeBenefitPlans" id="Role_DisclosureEmployeeBenefitPlans">
        <link:definition>100200 - Disclosure - Employee Benefit Plans</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureMinorityInvestments" id="Role_DisclosureMinorityInvestments">
        <link:definition>100210 - Disclosure - Minority Investments</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureRestructuring" id="Role_DisclosureRestructuring">
        <link:definition>100220 - Disclosure - Restructuring</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegments" id="Role_DisclosureBusinessSegments">
        <link:definition>100230 - Disclosure - Business Segments</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureQuarterlyFinancialData" id="Role_DisclosureQuarterlyFinancialData">
        <link:definition>100240 - Disclosure - Quarterly Financial Data</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSubsequentEvents" id="Role_DisclosureSubsequentEvents">
        <link:definition>100250 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureRecentAccountingPronouncements" id="Role_DisclosureRecentAccountingPronouncements">
        <link:definition>100260 - Disclosure - Recent Accounting Pronouncements</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/ScheduleValuationAndQualifyingAccounts" id="Role_ScheduleValuationAndQualifyingAccounts">
        <link:definition>100270 - Schedule - Valuation and Qualifying Accounts</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>100280 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesTables" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesTables">
        <link:definition>100290 - Disclosure - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureFairValueMeasurementsTables" id="Role_DisclosureFairValueMeasurementsTables">
        <link:definition>100300 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsReceivableTables" id="Role_DisclosureAccountsReceivableTables">
        <link:definition>100310 - Disclosure - Accounts Receivable (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureInventoryTables" id="Role_DisclosureInventoryTables">
        <link:definition>100320 - Disclosure - Inventory (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosurePropertyPlantAndEquipmentTables" id="Role_DisclosurePropertyPlantAndEquipmentTables">
        <link:definition>100330 - Disclosure - Property, Plant and Equipment (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssetsTables" id="Role_DisclosureIntangibleAssetsTables">
        <link:definition>100340 - Disclosure - Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsPayableAndAccruedExpensesTables" id="Role_DisclosureAccountsPayableAndAccruedExpensesTables">
        <link:definition>100350 - Disclosure - Accounts Payable and Accrued Expenses (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureWarrantsAndDerivativeLiabilitiesTables" id="Role_DisclosureWarrantsAndDerivativeLiabilitiesTables">
        <link:definition>100360 - Disclosure - Warrants and Derivative Liabilities (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesTables" id="Role_DisclosureIncomeTaxesTables">
        <link:definition>100370 - Disclosure - Income Taxes (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquityTables" id="Role_DisclosureStockholdersEquityTables">
        <link:definition>100380 - Disclosure - Stockholders&apos; Equity (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" id="Role_DisclosureCommitmentsAndContingenciesTables">
        <link:definition>100390 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureRestructuringTables" id="Role_DisclosureRestructuringTables">
        <link:definition>100400 - Disclosure - Restructuring (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegmentsTables" id="Role_DisclosureBusinessSegmentsTables">
        <link:definition>100410 - Disclosure - Business Segments (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureQuarterlyFinancialDataTables" id="Role_DisclosureQuarterlyFinancialDataTables">
        <link:definition>100420 - Disclosure - Quarterly Financial Data (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureNatureOfBusinessAndOperationsAndLiquidityAdditionalInformationDetail" id="Role_DisclosureNatureOfBusinessAndOperationsAndLiquidityAdditionalInformationDetail">
        <link:definition>100430 - Disclosure - Nature of the Business and Operations and Liquidity - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesAdditionalInformationDetail">
        <link:definition>100440 - Disclosure - Summary of Significant Accounting Policies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyPlantAndEquipmentDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesEstimatedUsefulLifeOfPropertyPlantAndEquipmentDetail">
        <link:definition>100450 - Disclosure - Summary of Significant Accounting Policies - Estimated Useful Life of Property, Plant and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesReconciliationOfNumeratorsAndDenominatorsOfEPSCalculationDetail" id="Role_DisclosureSummaryOfSignificantAccountingPoliciesReconciliationOfNumeratorsAndDenominatorsOfEPSCalculationDetail">
        <link:definition>100460 - Disclosure - Summary of Significant Accounting Policies - Reconciliation of Numerators and Denominators of EPS Calculation (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfAssetsAndLiabilitiesCarriedAtFairValueOnRecurringBasisDetail" id="Role_DisclosureFairValueMeasurementsScheduleOfAssetsAndLiabilitiesCarriedAtFairValueOnRecurringBasisDetail">
        <link:definition>100470 - Disclosure - Fair Value Measurements - Schedule of Assets and Liabilities Carried at Fair Value on Recurring Basis (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail" id="Role_DisclosureFairValueMeasurementsScheduleOfLiabilitiesMeasuredAtFairValueOnRecurringBasisDetail">
        <link:definition>100480 - Disclosure - Fair Value Measurements - Schedule of Liabilities Measured at Fair Value on Recurring Basis (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsReceivableScheduleOfAccountsReceivableDetail" id="Role_DisclosureAccountsReceivableScheduleOfAccountsReceivableDetail">
        <link:definition>100490 - Disclosure - Accounts Receivable - Schedule of Accounts Receivable (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureInventoryScheduleOfInventoryDetail" id="Role_DisclosureInventoryScheduleOfInventoryDetail">
        <link:definition>100500 - Disclosure - Inventory - Schedule of Inventory (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureInventoryAdditionalInformationDetail" id="Role_DisclosureInventoryAdditionalInformationDetail">
        <link:definition>100510 - Disclosure - Inventory - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosurePropertyPlantAndEquipmentScheduleOfCostAndAccumulatedDepreciationOfPropertyAndEquipmentDetail" id="Role_DisclosurePropertyPlantAndEquipmentScheduleOfCostAndAccumulatedDepreciationOfPropertyAndEquipmentDetail">
        <link:definition>100520 - Disclosure - Property, Plant and Equipment - Schedule of Cost and Accumulated Depreciation of Property and Equipment (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosurePropertyPlantAndEquipmentAdditionalInformationDetail" id="Role_DisclosurePropertyPlantAndEquipmentAdditionalInformationDetail">
        <link:definition>100530 - Disclosure - Property, Plant and Equipment - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssetsScheduleOfIntangibleAssetsDetail" id="Role_DisclosureIntangibleAssetsScheduleOfIntangibleAssetsDetail">
        <link:definition>100540 - Disclosure - Intangible Assets - Schedule of Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssetsAdditionalInformationDetail" id="Role_DisclosureIntangibleAssetsAdditionalInformationDetail">
        <link:definition>100550 - Disclosure - Intangible Assets - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssetsScheduleOfExpectedFutureAmortizationExpenseDetail" id="Role_DisclosureIntangibleAssetsScheduleOfExpectedFutureAmortizationExpenseDetail">
        <link:definition>100560 - Disclosure - Intangible Assets - Schedule of Expected Future Amortization Expense (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssetsScheduleOfGeographicCompositionOfGoodwillAndIntangibleAssetsDetail" id="Role_DisclosureIntangibleAssetsScheduleOfGeographicCompositionOfGoodwillAndIntangibleAssetsDetail">
        <link:definition>100570 - Disclosure - Intangible Assets - Schedule of Geographic Composition of Goodwill and Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIntangibleAssetsScheduleOfBusinessSegmentCompositionOfIntangibleAssetsDetail" id="Role_DisclosureIntangibleAssetsScheduleOfBusinessSegmentCompositionOfIntangibleAssetsDetail">
        <link:definition>100580 - Disclosure - Intangible Assets - Schedule of Business Segment Composition of Intangible Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsPayableAndAccruedExpensesScheduleOfAccountsPayableAndAccruedExpensesDetail" id="Role_DisclosureAccountsPayableAndAccruedExpensesScheduleOfAccountsPayableAndAccruedExpensesDetail">
        <link:definition>100590 - Disclosure - Accounts Payable and Accrued Expenses - Schedule of Accounts Payable and Accrued Expenses (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsPayableAndAccruedExpensesAdditionalInformationDetail" id="Role_DisclosureAccountsPayableAndAccruedExpensesAdditionalInformationDetail">
        <link:definition>100600 - Disclosure - Accounts Payable and Accrued Expenses - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureAccountsPayableAndAccruedExpensesScheduleOfProductWarrantyActivityDetail" id="Role_DisclosureAccountsPayableAndAccruedExpensesScheduleOfProductWarrantyActivityDetail">
        <link:definition>100610 - Disclosure - Accounts Payable and Accrued Expenses - Schedule of Product Warranty Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureDebtAdditionalInformationDetail" id="Role_DisclosureDebtAdditionalInformationDetail">
        <link:definition>100620 - Disclosure - Debt - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureWarrantsAndDerivativeLiabilitiesAdditionalInformationDetail" id="Role_DisclosureWarrantsAndDerivativeLiabilitiesAdditionalInformationDetail">
        <link:definition>100630 - Disclosure - Warrants and Derivative Liabilities - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureWarrantsAndDerivativeLiabilitiesScheduleOfAssumptionsUsedToCalculateFairValueOfWarrantsDetail" id="Role_DisclosureWarrantsAndDerivativeLiabilitiesScheduleOfAssumptionsUsedToCalculateFairValueOfWarrantsDetail">
        <link:definition>100640 - Disclosure - Warrants and Derivative Liabilities - Schedule of Assumptions Used to Calculate the Fair Value of Warrants (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesScheduleOfIncomeLossBeforeIncomeTaxesDetail" id="Role_DisclosureIncomeTaxesScheduleOfIncomeLossBeforeIncomeTaxesDetail">
        <link:definition>100650 - Disclosure - Income Taxes - Schedule of Income (Loss) Before Income Taxes (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitAttributableToContinuingOperationsDetail" id="Role_DisclosureIncomeTaxesScheduleOfComponentsOfIncomeTaxExpenseBenefitAttributableToContinuingOperationsDetail">
        <link:definition>100660 - Disclosure - Income Taxes - Schedule of Components of Income Tax Expense (Benefit) Attributable to Continuing Operations (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesScheduleOfReconciliationOfStatutoryFederalIncomeTaxRateToEffectiveIncomeTaxRateDetail" id="Role_DisclosureIncomeTaxesScheduleOfReconciliationOfStatutoryFederalIncomeTaxRateToEffectiveIncomeTaxRateDetail">
        <link:definition>100670 - Disclosure - Income Taxes - Schedule of Reconciliation of Statutory Federal Income Tax Rate to Effective Income Tax Rate (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetail" id="Role_DisclosureIncomeTaxesScheduleOfDeferredTaxAssetsAndLiabilitiesDetail">
        <link:definition>100680 - Disclosure - Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesAdditionalInformationDetail" id="Role_DisclosureIncomeTaxesAdditionalInformationDetail">
        <link:definition>100690 - Disclosure - Income Taxes - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureIncomeTaxesScheduleOfUncertaintiesInIncomeTaxProvisionLiabilityDetail" id="Role_DisclosureIncomeTaxesScheduleOfUncertaintiesInIncomeTaxProvisionLiabilityDetail">
        <link:definition>100700 - Disclosure - Income Taxes - Schedule of Uncertainties in Income Tax Provision Liability (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquityComponentsOfEmployeeStockBasedCompensationDetail" id="Role_DisclosureStockholdersEquityComponentsOfEmployeeStockBasedCompensationDetail">
        <link:definition>100710 - Disclosure - Stockholders&apos; Equity - Components of Employee Stock-Based Compensation (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquityAdditionalInformationDetail" id="Role_DisclosureStockholdersEquityAdditionalInformationDetail">
        <link:definition>100720 - Disclosure - Stockholders&apos; Equity - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquitySummaryOfStockBasedCompensationExpenseDetail" id="Role_DisclosureStockholdersEquitySummaryOfStockBasedCompensationExpenseDetail">
        <link:definition>100730 - Disclosure - Stockholders&apos; Equity - Summary of Stock-Based Compensation Expense (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquitySummaryOfEmployeeAndNonEmployeeStockOptionsActivityDetail" id="Role_DisclosureStockholdersEquitySummaryOfEmployeeAndNonEmployeeStockOptionsActivityDetail">
        <link:definition>100740 - Disclosure - Stockholders&apos; Equity - Summary of Employee and Non-Employee Stock Options Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquityScheduleOfWeightedAverageAssumptionsUsedInBlackScholesValuationModelForStockOptionsGrantedDetail" id="Role_DisclosureStockholdersEquityScheduleOfWeightedAverageAssumptionsUsedInBlackScholesValuationModelForStockOptionsGrantedDetail">
        <link:definition>100750 - Disclosure - Stockholders&apos; Equity - Schedule of Weighted Average Assumptions used in Black-Scholes Valuation Model for Stock Options Granted (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureStockholdersEquitySummaryOfEmployeeAndNonEmployeeRestrictedStockActivityDetail" id="Role_DisclosureStockholdersEquitySummaryOfEmployeeAndNonEmployeeRestrictedStockActivityDetail">
        <link:definition>100760 - Disclosure - Stockholders&apos; Equity - Summary of the Employee and Non-Employee Restricted Stock Activity (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureCommitmentsAndContingenciesAdditionalInformationDetail" id="Role_DisclosureCommitmentsAndContingenciesAdditionalInformationDetail">
        <link:definition>100770 - Disclosure - Commitments and Contingencies - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfMinimumFutureLeaseCommitmentsDetail" id="Role_DisclosureCommitmentsAndContingenciesScheduleOfMinimumFutureLeaseCommitmentsDetail">
        <link:definition>100780 - Disclosure - Commitments and Contingencies - Schedule of Minimum Future Lease Commitments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureCommitmentsAndContingenciesScheduleOfRentExpenseUnderOperatingLeasesDetail" id="Role_DisclosureCommitmentsAndContingenciesScheduleOfRentExpenseUnderOperatingLeasesDetail">
        <link:definition>100790 - Disclosure - Commitments and Contingencies - Schedule of Rent Expense Under Operating Leases (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureEmployeeBenefitPlansAdditionalInformationDetail" id="Role_DisclosureEmployeeBenefitPlansAdditionalInformationDetail">
        <link:definition>100800 - Disclosure - Employee Benefit Plans - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureMinorityInvestmentsAdditionalInformationDetail" id="Role_DisclosureMinorityInvestmentsAdditionalInformationDetail">
        <link:definition>100810 - Disclosure - Minority Investments - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureRestructuringAdditionalInformationDetail" id="Role_DisclosureRestructuringAdditionalInformationDetail">
        <link:definition>100820 - Disclosure - Restructuring - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureRestructuringScheduleOfRestructuringChargesAndCashPaymentsDetail" id="Role_DisclosureRestructuringScheduleOfRestructuringChargesAndCashPaymentsDetail">
        <link:definition>100830 - Disclosure - Restructuring - Schedule of Restructuring Charges and Cash Payments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegmentsAdditionalInformationDetail" id="Role_DisclosureBusinessSegmentsAdditionalInformationDetail">
        <link:definition>100840 - Disclosure - Business Segments - Additional Information (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegmentsOperatingResultsForTwoBusinessSegmentsDetail" id="Role_DisclosureBusinessSegmentsOperatingResultsForTwoBusinessSegmentsDetail">
        <link:definition>100850 - Disclosure - Business Segments - Operating Results for Two Business Segments (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegmentsTotalBusinessSegmentsAssetsDetail" id="Role_DisclosureBusinessSegmentsTotalBusinessSegmentsAssetsDetail">
        <link:definition>100860 - Disclosure - Business Segments - Total Business Segments Assets (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegmentsGeographicInformationAboutRevenueBasedOnShipmentsToCustomersByRegionDetail" id="Role_DisclosureBusinessSegmentsGeographicInformationAboutRevenueBasedOnShipmentsToCustomersByRegionDetail">
        <link:definition>100870 - Disclosure - Business Segments - Geographic Information about Revenue, Based on Shipments to Customers by Region (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureBusinessSegmentsGeographicInformationAboutPropertyPlantAndEquipmentAssociatedWithParticularRegionsDetail" id="Role_DisclosureBusinessSegmentsGeographicInformationAboutPropertyPlantAndEquipmentAssociatedWithParticularRegionsDetail">
        <link:definition>100880 - Disclosure - Business Segments - Geographic Information about Property, Plant and Equipment Associated with Particular Regions (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/DisclosureQuarterlyFinancialDataScheduleOfQuarterlyFinancialDataDetail" id="Role_DisclosureQuarterlyFinancialDataScheduleOfQuarterlyFinancialDataDetail">
        <link:definition>100890 - Disclosure - Quarterly Financial Data - Schedule of Quarterly Financial Data (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.amsc.com/20160331/taxonomy/role/ScheduleValuationAndQualifyingAccountsDetail" id="Role_ScheduleValuationAndQualifyingAccountsDetail">
        <link:definition>100900 - Schedule - Valuation and Qualifying Accounts (Detail)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </appinfo>
  </annotation>
  <element id="amsc_GainLossInChangeOfFairValueOfDerivativeInstrumentsAndWarrants" name="GainLossInChangeOfFairValueOfDerivativeInstrumentsAndWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_DeferredTaxAssetsFixedAssetsAndIntangibles" name="DeferredTaxAssetsFixedAssetsAndIntangibles" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_DeferredTaxLiabilitiesIntercompanyDebt" name="DeferredTaxLiabilitiesIntercompanyDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_DocumentAndEntityInformationAbstract" name="DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_CurrentPortionOfUnamortizedDebtDiscount" name="CurrentPortionOfUnamortizedDebtDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_NoncurrentPortionOfUnamortizedDebtDiscount" name="NoncurrentPortionOfUnamortizedDebtDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_StockIssuedDuringPeriodValueEquityOffering" name="StockIssuedDuringPeriodValueEquityOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_StockIssuedDuringPeriodSharesEquityOffering" name="StockIssuedDuringPeriodSharesEquityOffering" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_StockIssuedDuringPeriodValueNewIssuesEquityRaise" name="StockIssuedDuringPeriodValueNewIssuesEquityRaise" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_StockIssuedDuringPeriodSharesNewIssuesEquityRaise" name="StockIssuedDuringPeriodSharesNewIssuesEquityRaise" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_WriteoffPrepaidTaxes" name="WriteoffPrepaidTaxes" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_ReversalOfLitigationSettlementAmount" name="ReversalOfLitigationSettlementAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_ProceedsFromIssuanceFollowOnPublicOffering" name="ProceedsFromIssuanceFollowOnPublicOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_RisksAndUncertaintiesPolicyTextBlock" name="RisksAndUncertaintiesPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_ScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock" name="ScheduleOfEstimatedUsefulLifeOfPropertyPlantAndEquipmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_ScheduleOfGeographicCompositionOfGoodwillAndIntangibleAssetsTableTextBlock" name="ScheduleOfGeographicCompositionOfGoodwillAndIntangibleAssetsTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_SeniorConvertibleNoteWarrantMember" name="SeniorConvertibleNoteWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_HerculesWarrantMember" name="HerculesWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_NovemberTwoThousandFourteenWarrantMember" name="NovemberTwoThousandFourteenWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_DescriptionOfBusinessLineItems" name="DescriptionOfBusinessLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_DescriptionOfBusinessTable" name="DescriptionOfBusinessTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_InoxWindLimitedMember" name="InoxWindLimitedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_TresAmigasMember" name="TresAmigasMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_BladeDynamicsLtdMember" name="BladeDynamicsLtdMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_ManufacturingPeriodAllowedUnderLicenseAgreement" name="ManufacturingPeriodAllowedUnderLicenseAgreement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_RevenueRecognitionUpfrontPaymentsReceived" name="RevenueRecognitionUpfrontPaymentsReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_AdvancePaymentReceivable" name="AdvancePaymentReceivable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_PercentageOfOutstandingCommonStock" name="PercentageOfOutstandingCommonStock" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_AdditionalProceedsReceivableOnMilestoneAchievements" name="AdditionalProceedsReceivableOnMilestoneAchievements" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_MilestoneAchievementPeriod" name="MilestoneAchievementPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_MinorityInterestOwnershipPercentageSold" name="MinorityInterestOwnershipPercentageSold" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="amsc_BasfCorporationMember" name="BasfCorporationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_ForeignEarningsRepatriatedMember" name="ForeignEarningsRepatriatedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_CostOfRevenuesBenefitInventoriesPreviouslyWrittenDown" name="CostOfRevenuesBenefitInventoriesPreviouslyWrittenDown" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_GuaranteedAnnualPaymentsUnderLicenseRightsTransfer" name="GuaranteedAnnualPaymentsUnderLicenseRightsTransfer" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_WarrantyPeriod" name="WarrantyPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_MinimumPercentageOfAmountBeingRealizedUponUltimateSettlement" name="MinimumPercentageOfAmountBeingRealizedUponUltimateSettlement" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_FairValueDisclosureIssuanceOfWarrantsWithEquityOffering" name="FairValueDisclosureIssuanceOfWarrantsWithEquityOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_FairValueDisclosureIssuanceOfWarrantsWithSecuredTermLoan" name="FairValueDisclosureIssuanceOfWarrantsWithSecuredTermLoan" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_EquipmentAndSoftwareMember" name="EquipmentAndSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_CoreTechnologyAndKnowHowMember" name="CoreTechnologyAndKnowHowMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_WindMember" name="WindMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_GridMember" name="GridMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_AccruedInventoriesInTransit" name="AccruedInventoriesInTransit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_LegalAndOriginationCosts" name="LegalAndOriginationCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_DebtInstrumentEndOfTermFee" name="DebtInstrumentEndOfTermFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_MinimumAmountOfProceedsFromSpecifiedAssetDispositionsForMandatoryPrepaymentFeature" name="MinimumAmountOfProceedsFromSpecifiedAssetDispositionsForMandatoryPrepaymentFeature" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_TermLoanBMember" name="TermLoanBMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_SeniorSecuredLoanMember" name="SeniorSecuredLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_HerculesTechnologyGrowthCapitalMember" name="HerculesTechnologyGrowthCapitalMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_TermLoanCMember" name="TermLoanCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_TermLoanMember" name="TermLoanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_CapitalVenturesInternationalMember" name="CapitalVenturesInternationalMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_PurchaseCommitmentIssuanceOfWarrantsSharesOfCommonStock" name="PurchaseCommitmentIssuanceOfWarrantsSharesOfCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_PurchaseCommitmentIssuanceOfWarrantsFairValueOfSharesOfCommonStock" name="PurchaseCommitmentIssuanceOfWarrantsFairValueOfSharesOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_NonCashInterestExpenseAmortizationOfDebtDiscount" name="NonCashInterestExpenseAmortizationOfDebtDiscount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_DebtInstrumentCovenantUnrestrictedCashBalanceRequirement" name="DebtInstrumentCovenantUnrestrictedCashBalanceRequirement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_WarrantExerciseWaitingPeriod" name="WarrantExerciseWaitingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_WarrantExercisePeriod" name="WarrantExercisePeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_BeneficialOwnershipLimitationPercentage" name="BeneficialOwnershipLimitationPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_OwnershipPercentageNotificationPeriodRequirement" name="OwnershipPercentageNotificationPeriodRequirement" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_NewUnsecuredSeniorConvertibleNoteMember" name="NewUnsecuredSeniorConvertibleNoteMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_HudsonWarrantMember" name="HudsonWarrantMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_WarrantInstrumentsFairValueDisclosure" name="WarrantInstrumentsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_PostModificationMember" name="PostModificationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_PreModificationMember" name="PreModificationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_WarrantsToPurchaseOneShareOfCommonStock" name="WarrantsToPurchaseOneShareOfCommonStock" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="amsc_NumberOfWarrantsIssuedToPurchaseCommonStock" name="NumberOfWarrantsIssuedToPurchaseCommonStock" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="amsc_EffectiveIncomeTaxRateReconciliationDeferredWarrants" name="EffectiveIncomeTaxRateReconciliationDeferredWarrants" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_EffectiveIncomeTaxRateReconciliationDebtExtinguishment" name="EffectiveIncomeTaxRateReconciliationDebtExtinguishment" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxExpenseBenefits" name="EffectiveIncomeTaxRateReconciliationReversalOfUncertainTaxExpenseBenefits" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_EffectiveIncomeTaxRateReconciliationTrueUpOfForeignNetOperatingLoss" name="EffectiveIncomeTaxRateReconciliationTrueUpOfForeignNetOperatingLoss" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_EffectiveIncomeTaxRateReconciliationNondeductibleForeignExchangeRemeasurementLoss" name="EffectiveIncomeTaxRateReconciliationNondeductibleForeignExchangeRemeasurementLoss" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_PowerQualitySystemsIncMember" name="PowerQualitySystemsIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_AustriaMember" name="AustriaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_StockOptionsExercisedDates" name="StockOptionsExercisedDates" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_NetOperatingLossCarryforwardPeriod" name="NetOperatingLossCarryforwardPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_ForeignEarningsAvailableForRepatriation" name="ForeignEarningsAvailableForRepatriation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_StockholdersEquityLineItems" name="StockholdersEquityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_StockholdersEquityTable" name="StockholdersEquityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_PerformanceBasedRestrictedStockMember" name="PerformanceBasedRestrictedStockMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_TwoThousandAndSevenDirectorPlanMember" name="TwoThousandAndSevenDirectorPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_TwoThousandAndSevenPlanMember" name="TwoThousandAndSevenPlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_CowenAndCompanyLimitedLiabilityCompanyMember" name="CowenAndCompanyLimitedLiabilityCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingIntrinsicValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsOutstandingIntrinsicValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsBonusAndSeveranceGrantsFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsBonusAndSeveranceGrantsFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsBonusAndSeveranceStockVestedInPeriodFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsBonusAndSeveranceStockVestedInPeriodFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsContractualLife" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsContractualLife" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_NumberOfSharesGrantedByOptionUponElectionToBoard" name="NumberOfSharesGrantedByOptionUponElectionToBoard" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAwardedAnnually" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAwardedAnnually" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_GrantDateValueOfSharesGrantedByOptionUponElectionToBoard" name="GrantDateValueOfSharesGrantedByOptionUponElectionToBoard" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_VestingPeriodOfSharesGrantedByOptionUponElectionToBoard" name="VestingPeriodOfSharesGrantedByOptionUponElectionToBoard" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_AreaOfLeasedProperty" name="AreaOfLeasedProperty" type="num:areaItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="amsc_CommitmentsAndContingenciesLineItems" name="CommitmentsAndContingenciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_CommitmentsAndContingenciesTable" name="CommitmentsAndContingenciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_GhodawatEnergyPvtLtdMember" name="GhodawatEnergyPvtLtdMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_SinovelWindGroupCoLtdMember" name="SinovelWindGroupCoLtdMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_ReimbursementOfArbitrationExpenses" name="ReimbursementOfArbitrationExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit" />
  <element id="amsc_AccruedExpenseReversal" name="AccruedExpenseReversal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_SupplyCommitmentRemainingAmountCommitted" name="SupplyCommitmentRemainingAmountCommitted" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit" />
  <element id="amsc_DefinedContributionPlanCompanyContributionPercentageMatchCommonStock" name="DefinedContributionPlanCompanyContributionPercentageMatchCommonStock" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_DefinedContributionPlanPercentageOfFirstEligibleEmployeeContributionMatchedByEmployer" name="DefinedContributionPlanPercentageOfFirstEligibleEmployeeContributionMatchedByEmployer" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
  <element id="amsc_EquityMethodInvestmentsNumberOfCommonlyInterconnectedPowerGrids" name="EquityMethodInvestmentsNumberOfCommonlyInterconnectedPowerGrids" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" />
  <element id="amsc_EmployeeSeverancePayAndBenefitMember" name="EmployeeSeverancePayAndBenefitMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_FacilityExitAndRelocationCostsMember" name="FacilityExitAndRelocationCostsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_BeijingJingchengNewEnergyCompanyLimitedMember" name="BeijingJingchengNewEnergyCompanyLimitedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true" />
  <element id="amsc_BusinessSegmentsPowerOfWindTurbines" name="BusinessSegmentsPowerOfWindTurbines" type="num:powerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" />
</schema>
