Article ID: 24003605
Permanent magnet synchronous motors (PMSMs) generate torque ripple through the pulse width modulation (PWM) method of voltage source inverters. In this report, we propose a method to reduce torque ripple during overmodula- tion in asynchronous PWM. In asynchronous PWM, when the number of pulses decreases during high-speed rotation, three-phase voltage imbalance occurs and torque ripple occurs. By controlling the PWM pulse edge using trapezoidal wave modulation, seamless control from asynchronous PWM down to a single pulse can be achieved. The effectiveness of the proposed method was confirmed by its simulation and experimental results.