Reactive PowerBasedSpeedSensorless Controller forPermanent MagnetSynchronous MotorDrive

Inthis paperareactive powerbasedModelReferencebasedmethods isalsoreported inliterature, wheretheformer Adaptive System (MRAS)isutilized toestimate thespeed ofa isusedatzeroorverylowspeed andthelater forhighspeed. vector controlled Permanent MagnetSynchronous MotorDrive However, theaccuracy ofthis methodishighly influenced by (PMSM)forall speed range. Theuniqueness ofthis system isthat thegeometry oftherotor (i.e., positioning ofthepermanent boththesteady-state andinstantaneous reactive powerareused magnets). Forthatreason this methodisnotsuitable for toformtheMRAS.Suchnewstructure ofMRAS isindependent sacemounted PMsMd thismethod