Current Energization Method for Suppressing Torque Ripple in Permanent Magnet Synchronous Motors Including High-Speed Operation Beyond the Feedback Current Controller Bandwidth

This paper presents a current energization method for suppressing torque ripple in permanent magnet synchronous motors. The proposed approach superimposes a cancellation current onto the current reference of the feedback current controller to reduce torque ripple. To ensure accurate injection of the cancellation current at frequencies exceeding the bandwidth of the feedback current controller, a compensation voltage is additionally applied. Experimental results demonstrate the effectiveness of the proposed method.