Design Optimization of a Synchronous Reluctance Machine by Using the Combined Topology-Normalized Shape Method

In recent years, with the increasing requirements of machine performance, the traditional electrical machine structure and optimization methods are more and more difficult to meet the application needs. Aiming at solving the problem of high dimensional multi-objective nonlinear strong coupling optimization, it is necessary to study the efficient optimization method. In this article, size optimization (SIO), shape optimization (SHO), and topology optimization (TPO) methods are compared and analyzed. Based on the above optimization methods, a combined topology-SHO (PTPO-NSHO) method is proposed and two boundary shape modeling methods are established and used in SHO and PTPO-NSHO, respectively. Four optimization methods including SIO, SHO, TPO, and PTPO-NSHO are employed to optimize the rotor flux barrier of synchronous reluctance machines (SynRMs), and their optimization time and results are compared. It can be seen that the proposed PTPO-NSHO can make the SynRM with very good torque performance while acceptable optimization time is required.