Performance-Reliability-Oriented Optimization Design of Hybrid PM Motor Considering the Effect of Magnetization Deviation

This article proposes a performance-reliability-oriented optimization design method for hybrid permanent magnet (HPM) motors to address the challenges of magnetization deviations in permanent magnet (PM) materials. Such magnetic deviations often result in the deterioration of electromagnetic performance, which limits the further application of HPM motors. The article takes a 12-slot/10-pole HPM motor as a design example, analyzing the impact of magnetization deviation on the motor’s torque and vibration characteristics in detail. Then, a worst case robust optimization framework is proposed to improve the HPM motor performance, simultaneously ensuring corresponding reliability under magnetization deviation. Comparative analysis of the optimization results shows that the proposed method can effectively alleviate the additional torque ripple and vibration caused by magnetization deviations. Experimental validation on a prototype motor highlights the effectiveness of this optimization approach.