A Novel Axial-Radial Hybrid Flux Vernier Permanent Magnet Machine

In this paper, a novel axial-radial hybrid flux vernier permanent magnet (AR-VPM) machine with magnetic flux regulation capability is proposed, which concentrates a radial and axial flux structure to maximize the torque. Establish the relationship between the flatness ratio and split ratio of the axial-radial machine and torque, and optimal structure of the AR-VPM machine is determined to achieve maximum torque output. The integrated toroidal winding with DC bias is used instead of armature winding and field winding, which can generate zero sequence current inside the winding for flux regulation and also simplify winding configuration. It can realize the multi magnetic field modulation effect of hybrid flux, double permanent magnet (PM) and zero sequence current excitation. This paper introduces the basic principle of AR-VPM machine, compares and analyzes the flux density and flux regulation capability, as well as the rate torque distribution.