简介：Theflux-weakeningperformanceofapermanentmagnetbrushlessACdrivewasinvestigatedusingbothfloating-pointandfixed-pointDSPcontrollers.Asignificantcurrentoscillationwasobservedwhenthedrivewasoperatedathigh-speedintheflux-weakeningmodewiththefixed-pointDSP.Theinvestigationshowedthatthiswasduetotheon-linecompensationofthewindingresistancevoltagedropandquantisationerrorsassociatedwiththefixed-pointarchitectureoftheDSP.Asimplelook-uptableschemeisproposedtoeliminatetheoscillationandtoachieveextendedflux-weakeningcapability.
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