The edge effect due to the special structure of two degree-of-freedom direct induction motor (2DoFDDIM) results in three-phase asymmetric current, high torque ripple, more loss and low efficiency. In this paper, to weaken edge effect of 2DoFDDIM rotary part, poles optimization is carried out considering the constraint of rotary arc-armature size. In order to obtain optimum parameters and high efficiency of rotary part, The Taguchi method of multi-objective optimization design is carried out. The 3D finite element models of final design and initial design of rotary part and initial design prototype are established, respectively. Through the comparison between the final design simulation, initial design simulation and test results, the results indicate that the performances of 2DoFDDIM rotary part have a great improvement after optimizations and verify the feasibility of Taguchi method used for 2DoFDDIM multi-objective optimization design. © 2021 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

中文翻译：

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2DoF直驱感应电机回转部多目标优化设计与分析

由于二自由度直接感应电机（2DoFDDIM）特殊结构的边缘效应导致三相不对称电流、高转矩纹波、更多损耗和低效率。本文为了减弱2DoFDDIM旋转部件的边缘效应，考虑旋转弧-衔铁尺寸的约束进行极点优化。为获得旋转部件的最佳参数和高效率，进行了多目标优化设计的田口方法。分别建立了旋转部件最终设计和初始设计的3D有限元模型和初始设计原型。通过最终设计仿真、初始设计仿真和测试结果的对比，结果表明，优化后的2DoFDDIM旋转部分性能有较大提升，验证了田口方法用于2DoFDDIM多目标优化设计的可行性。© 2021 日本电气工程师学会。由 Wiley Periodicals LLC 出版。