The Overmodulation Strategies for Space Voltage Vector PWM
YANG Wen-qiang, CAI Xu, JIANG Jian-guo(School of Electronic,Information and Electrical Eng.,Shanghai Jiaotong Univ.,Shanghai 200030,China)
Two overmodulation strategies for space voltage vector PWM were investigated, which are with minimum phase error or with minimum magnitude error respectively. Their principles, algorithms, waveforms of output voltage and maximum modulation index are included. The overmodulation strategies were applied to the vector-controlled induction motor. An increase in the magnitude of fundamental output voltage was verified by experiments. The distortion in phase current was analyzed.
【CateGory Index】： TM921.5