Torque Ripple Minimization Control Strategy in Synchronous Reluctance Machines

Torque smoothness is an essential requirement for high-performance motor drive applications. Synchronous reluctance machines have high torque ripple due to non-linear magnetic path coupled with saturation of the rotor core segments during operation. This paper proposes an active torque ripple minimization technique for Synchronous reluctance machine using current injection. The proposed method is aimed to compensate for both cogging and torque ripple generated by the machine. The method also optimizes for the minimum magnitude of ripple injection for active cancellation. The effectiveness of the proposed method is evaluated with both simulation and experimental results.