PIC16FXXX的传感器三相无刷电机控制

In2002,Iwrotemyfirstapplicationnoteonbrushless

motorcontrol,AN857,whichdescribedtheoperationof

sensoredandsensorlessbrushlessmotors.Thebasic

motoroperationconceptsdescribedinthatapplication

notestillapplytoday,therefore,Iwillnotrepeatthem

here.Inthetimesincethen,enhancementstotwoof

themicrocontrollerperipheralshavebeenmadethat

dramaticallyimprovethemicrocontrollercapabilitiesfor

sensorlessmotorcontrolapplications.Thisapplication

notewilldescribethoseenhancementsandhowthey

areusedtocreateasensorlessmotorcontrolsolution

withan8MHzPIC16FXXXdevicethathastrulystellar

performancewithseamlessoperationfrom100RPMto

over90,000RPM.AN1305Sensorless3-PhaseBrushlessMotorControlwiththePIC16FXXXAuthor:WardBrownTYPICALMOTORCONNECTIONMicrochipTechnologyInc.Figure1isasimplifiedblockdiagramofhowasensorless,3-phasebrushlessmotorisconfiguredwiththedriveandcontrolcircuitry.EachphaseofthemotorOVERVIEWisconnectedtothreecircuits:In2002,Iwrotemyfirstapplicationnoteonbrushles