Torque Enhancement Design and Comparison of PM assisted Synchronous Reluctance Motors with Different Hybrid PM Arrangments

This paper proposes and studies three types of permanent magnet assisted synchronous reluctance (PMASR) motors. Considering the economic benefits of permanent magnet materials, a method of using mixed permanent magnet materials is proposed. A comparative analysis is conducted on the following two types of motors: one is the traditional permanent magnet assisted synchronous reluctance motor using ferrite permanent magnets, and the other is the hybrid permanent magnet assisted synchronous reluctance motor using ferrite and NdFeB permanent magnets. Through the finite element analysis method combined with the frozen permeability method, the magnetic flux density distribution, torque characteristics, and magnetic chain characteristics of these three motors are compared in detail. The research results show that the hybrid PMASR motor demonstrates notable advantages in terms of electromagnetic performance while maintaining a similar total PM cost.