Robust Optimal Design of a Spoke-type Permanent Magnet Motor with Manufacturing Tolerances by Changing Permanent Magnet Shape

Abstract

This paper presents the robust optimal design of a spoke-type PM motor according to the permanent magnet shape to improve motor performance such as efficiency, torque ripple, and max torque, in terms of probability of failure as well as mean value. This paper uses the hybrid response surface method which has the hybrid structure between the response surface method and Taguchi design method. The method finds Z-value as the robustness index instead of the signal-to-noise ratio (SNR) used in the Taguchi method because of some weaknesses of the SNR. Finally, the design results of analysis models are verified by using the process capability analysis which performs the Monte-Carlo simulation.