Theinteriorpermanent-magnetsynchronousmotor(IPMSM)forvariablespeedapplicationsbecamepopularwiththesensorlessFieldOrientedControl(FOC)techniqueinindustrialandautomotivesystemsbecauseofhighpowerdensity,highefficiencyandfastdynamicperformance.Thisapplicationreportdescribeshowtoimplementaflux-