ANovel Direct LoadAngle Control forInterior Permanent Magnet Synchronous Machine Drives withSpace Vector Modulation

A direct loadangle control (DLAC)scheme of modulation forinduction machine drive werereported in Interior Permanent Magnet Synchronous Machine (IPMSM) is (7-12). Insuchcontrol schemes, either twoorone developed inthis paper, which isbased onload angle increment Proportional-Integral (PI) controllers weredeployed tocontrol (A6)control without complex reference frame transformation. It thestator fluxlinage andtorque. Withthese schemes, fixed features lowtorque andflux ripples andalmost fixed switching switching frequency andlower torque ripple wereachieved. frequency bymeansofSpace Vector Modulation (SVM). The However, fewpapers present theanalytical design principle of theoretical analysis provides aguide todetermine thecontroller thePIcontroller parameters forDTC withSVM.ThePI parameters. Modeling andexperimental results demonstrate the effectiveness oftheproposed scheme. controllers seemtobedetermined mainly bytrial anderror. Inthis paper, therelationship between torque andload angle