电气工程与自动化专业英语 教学课件 作者 王伟 13.pptx

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1、13.1　Introduction1)Theyincreasetheamountofmaintenancerequiredonthemachine,sincethebrushesmustbecheckedforwearregularly.2)Brushvoltagedropcanbethecauseofsignificantpowerlossesonmachineswithlargerfieldcurrents.13.2　PrincipleofOperation1.prime2.salient3.cylindrical4.graphite5.regardless6.exciter7

2、.rectifier8.pilot9.electrical10.spatial11.air-gap12.hydroelectric13.2　PrincipleofOperation13.steam14.steel15.In13.2　PrincipleofOperationFig.13-1　Schematicviewofasimpletwo-pole,single-phasesynchronousgenerator13.2　PrincipleofOperationFig.13-2　Generatedvoltageforthesingle-phasegeneratorofFig.13-

3、1a)spacedistributionoffluxdensity　b)correspondingwaveform13.2　PrincipleofOperationFig.13-3　Elementarytwo-polecylindrical-rotorfieldwinding13.2　PrincipleofOperationFig.13-4　Water-cooledrotorof190MVAhydroelectricgenerator13.2　PrincipleofOperationFig.13-5　Rotorofatwo-pole3,600r/minturbinegenerato

4、r13.2　PrincipleofOperationFig.13-6　Schematicviewsofthree-phasegeneratorsa)two-pole　b)four-pole　c)Yconnectionofthewindings