Abstract
In the multi-phase motor drive system, the five-phase motor is the typical representative. But the increase of the number of phases causes the number of IGBTs used by the inverter multiplied, and the use of SVPWM control with high frequency on and off causes the inverter switching loss increased, thus the inverter produces a lot of heat. In this paper, by adjusting the action order of effective vectors in SVPWM and the insertion position of zero vectors, a vector sequence optimization SVPWM technology is proposed. Compared with the conventional NFV-SVPWM technology, under the same frequency the switching times are reduced to 40% of NFV-SVPWM. The vector sequence optimization SVPWM and five-phase induction motor was simulated in Simulink. The simulation showed that the vector sequence optimization SVPWM introduced few harmonic content and the stator phase current distortion of the motor was low.
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