Abstract:This paper focus on the harmony control of chopping frequency at low speed range in which SRM operates with voltage-PWM mode in time and frequency domains. The simulation results indicate that the total distribution of spectrum of phase current on nth harmony frequencies keeps the same shape when the ratio of chopping frequency to shaft speed is constant. Thus chopping frequency and shaft speed can be harmony controlled by applying a proper chopping frequency-speed ratio. The phase current fluctuation is decre… Show more
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