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POZNANUNIVERSITYOFTECHNOLOGYACADEMICJOURNALS
No55
ElectricalEngineering
2007
MariuszBARAŃSKI
*
JerzyKOŁOWROTKIEWICZ
*
EXPERIMENTALVERIFICATIONOFAFIELD-CIRCUIT
SQUIRRELCAGEMOTORMODEL
Thispaperpresentsananalysisandtestresultsforasquirrelcageinductionmotor.The
calculationsarebasedonthefield-circuitmodel.Themathematicalmodelandanalgorithm
forsolvingequationsistakingintoaccountthenonlinearityofthemagneticcircuitandthe
skewedslotsintherotorarepresented.Afour-pole,three-phase,3kWinductionmotoris
investigated.Theresultsofcalculationsofstaticanddynamiccharacteristicsarecompared
tothosemeasuredonthelaboratorymodel.Selectedresultsincludingelectromagnetic
torqueandphasecurrentsarepresentedanddiscussed.
Keywords:finiteelementmethod,coupledelectromagneticphenomena
1.INTRODUCTION
Aswellknown,thethree-phasesquirrelcageinductionmotorsarethemost
widelyusedinindustry.Sinceinductionmotorsarereliableandcost-effective
thereishighdemandforthemespeciallybecauseofrapiddevelopmentofpower
electronicsanddigitalcontrolsystems.Bothsteadystatesandtransientfunctional
parametersaretakenintoaccountwhiledesigninginductionmachineswithwide
rangeofpoweroutput.Forthisreason,thealgorithmsutilizedforthedesignand
simulationareformulatedtoachievenotonlytheaverageandRMSvaluesbutalso
theinstantaneousvaluesoftestedquantitiessuchascurrentsorelectromagnetic
torques.
*
PoznańUniversityofTechnology,InstituteofElectricalEngineeringandElectronics.
