Optimal shape design of double-barriers in single-layer interior PM synchronous motor for reducing torque pulsation

A proposed novel double-barrier design with single-layer IPMSM is well proved to be effective for reducing pulsation torque, torque ripple and cogging torque, in published work, in which the torque characteristics be sensitive to the unique "connected" double-barrier structure is generally studied. This extended paper presents a few specific models for examining the effect of design variables in double-barrier design on pulsation torque reduction. With the help of response surface methodology (RSM), each of proposed models is optimized and analyzed. The pulsation torque calculation verified in previous work, that equivalent circuit method (ECM) coupling with finite element analysis (FEA) is still performed in this paper. In final, a more effectively and economic model of novel double-barrier IPMSM design on pulsation torque reduction is determined.