Comprehensive Comparative Analysis of High-Speed Permanent Magnet Motors With Different Winding Structures

There are three main types of winding structures for high-speed permanent magnet motors: double-layer lap winding, double-layer concentric winding, and toroidal winding. Different winding structures have different multiphysics properties. For example, although the toroidal winding can effectively improve the rotor dynamic characteristics, the loss and temperature characteristics would become worse. Unfortunately, current research on high-speed permanent magnet motors is mainly based on double-layer lap winding structures, lacking a comprehensive analysis of the multiphysical characteristics of the three winding structures. The quantitative impact of each winding structure on the various performance parameters of high-speed permanent magnet motors is unclear. Therefore, this article comprehensively compares the electromagnetic characteristics, loss characteristics, rotor dynamics characteristics, and temperature characteristics of three winding structures and finally obtains the quantitative impact of the three winding structures on various performance indicators.