Analysis of Vernier Machine with Stator-V-Shaped Permanent-Magnet Arrangement

This paper presents a new vernier permanent magnet machine (VPMM) with stator-V-shaped permanent-magnet arrangement, termed as (SV-VPMM). The key is to adopt unevenly distributed V-shaped PMs in the stator, which exhibits flux concentration effect and generates abundant working harmonics, thus improving the torque density and PM utilization ratio. Based on the air-gap field modulation theory, the working mechanism of the proposed SV-VPMM is investigated from two perspectives including stator-PM and rotor-PM fields. Then, the electromagnetic performance comparison between the proposed SV-VPMM and an existing VPMM is conducted by using finite element analysis (FEA).