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POZNANUNIVERSITYOFTECHNOLOGYACADEMICJOURNALS
No55
ElectricalEngineering
2007
StefanBROCK
*
KrzysztofZAWIRSKI
*
ANALYSISOFSPEEDDIGITALMEASUREMENT
METHODSFORSWITCHEDRELUCTANCEMOTOR
InthepaperselectedmethodsofspeedmeasurementforSwitchedReluctanceMotor
(SRM)wereanalysed.Twodifferentmeasurementsystemsweretakenintoaccount:one
withlowanotherwithhighresolutionsensor.Acompensationoferrorsoflowresolution
sensor(LRS)wasproposed.Differentspeedmeasurementmethods:M,T,M/Twithcon-
stantandvariablestepswerecompared.Resultsoftheoreticalanalysiswerevalidatedby
laboratoryexperiment.
Keywords:SwitchedReluctanceMotor,speedmeasurement
1.INTRODUCTION
SwitchedReluctanceMotor(SRM)isanobjectofinvestigationsinmanyre-
searchcentresovertheworld.Itsadvantagesaresimpleandeconomicconstruc-
tion,highmaximumrotationalspeedandhighreliability[3].Duetoapplicationof
DSPandFPGAincontrolsystemsitwaspossibletousetheSRMindriveswith
highdynamicrequirements.Insuchdrivestheprecisemeasurementofrotational
speedisnecessary.
2.THEORETICALANALYSISOFCONSTRAINSOFDIGITAL
SPEEDMEASUREMENT
Indigitalcontrolsystemsmeasurementofrotationalspeedisrealisedinindirect
waybymeansofpositionsensor.Simultaneouslytothespeedmeasurement
*
PoznańUniversityofTechnology,InstituteofControlandInformationEngineering.
