Abstract
Electric vehicle has speed vibration problem in Low-speed condition; one of the reasons is that the vehicle power-train resonates with motor's torque ripple in low motor speed. This paper analyzes the reason of motor's torque ripple in low speed; and proposes a method to reduced torque ripple in particular speed that vehicle power-train's natural frequency corresponding to; and builds motor model and motor controlling model in equivalent circuit software; and summarizes of the method to reduce the motor's torque ripple and vehicle's speed vibration preliminarily.
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