西安-利物浦电气电子工程部课件lanxiang wang.pdf

Contents

1.Introduction3

2.DCShuntMotors3

2.1Pre-labQuestion3

2.2Operatingandmechanicalcharacteristicstests4

2.2.1Experiments4

2.2.2ResultsandAnalysis5

2.3SpeedControlCharacteristics6

2.3.1Experiments6

2.3.2ResultsandAnalysis6

2.4Questions9

3.3-phaseSynchronousGenerators9

3.1Pre-lab10

3.2MeasurementofDCresistanceofarmaturewindingatroomtemperature10

3.2.1Experiments10

3.2.2ResultsandAnalysis11

3.3Noloadtest11

3.3.1Experiments11

3.3.2ResultsandAnalysis12

3.4ShortCircuitTest13

3.4.1Experiments13

3.4.2ResultsandAnalysis13

4.Conclusion15

2

1.Introduction

Generatorsandmotorsaretwosignificantinnovationsinthe19century.Thereareseveralkindsof

generatorsandmotors.Typicallyspeaking,theycanbedividedintotwomaincategories:DCmachine

andACmachine.ForDCmachine,thegeneratorsandmotorscouldhavedifferentconnectionmethods,

suchasseparatedexcitationconnection,seriesexcitation,shuntexcitation,andcompoundexcitation.

ForACmachines,generatorsandmotorscanbedividedintosynchronousmachinesandinduction

machines.ThisexperimentprovidesuswithagoodopportunitytounderstandhowtheDCmotorand

ACsynchronousgeneratorswork,especiallytoexploresomeimportantconcepts,suchasspeedcontrol

andmodelparametersmeasurement.

Thisreportisorganizedas:thefirstsectionisaboutDCshuntmotors,inwhichthemechanical

characteristicsaretestsandtheconceptofspeedcontrolisverified;thesecondsectionismainlyabout

ACsynchronousgenerators,inwhichthethreestepstomeasurethemodel