Design and Optimization of Fractional Slot Concentrated Winding PM Vernier Motor

Abstract

The Permanent Magnet Vernier Motor (PMVM) is a novel type of permanent magnet motor that has attracted considerable attention in recent years due to its ability to directly connect to the load. It exhibits remarkable efficiency across a wide range of speeds by employing the modulation effect, a technique that intentionally mismatches rotor and stator poles to enhance power density. This paper explores the design, analysis, and optimization of a 4.2 kW low pole ratio Fractional Slot Concentrated Winding Permanent Magnet Vernier Motor (FSCWPMVM) with a coil pitch of 2. The optimization process utilizes the NSGA algorithm to minimize motor mass while maintaining acceptable performance. The analysis employs the Finite Element Method (FEM) to evaluate torque, efficiency (EF), losses, power factor (PF), forces, demagnetization, mechanical, and thermal considerations.