Electromagnetic Performance Comparison of Halbach Array configurations in Permanent Magnet Synchronous Machine

Abstract

High-speed electrical machines are an appropriate choice for a wide range of applications. Among different types of them, the permanent magnet type is very popular. This paper presents a comparison between radial and various discrete magnet Halbach array configurations in a ferrite-based high-speed permanent magnet synchronous machine (PMSM). The structures performances containing the air-gap field distribution, back-electromotive-force as well as cogging torque are presented. Finally, the most suitable configuration among the proposed Halbach topologies is selected and is compared to its coreless counterpart through finite element analysis (FEA) simulations. According to results, while the cored PMSM with Halbach magnet array provides lower cogging torque and better performance than the conventional radial PMSM, the coreless one has the lowest amount of loss.