Abstract
this paper compares the torque ripple reductions of three synchronous reluctance machines (SynRMs) with different rotor topologies. Based on the proposed torque ripple reduction method, the optimal currents with different current's harmonics of the three SynRMs are calculated to decrease torque ripple. And the results are analyzed and compared. Besides, the copper losses produced by the added current's harmonics are also obtained and studied. Based on the analysis of the torque ripple reduction and copper losses, the choosing strategy of optimal order of current's harmonics is discussed. At last, several common conclusions are summarized by comparing the results among the three SynRMs.
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