Analysis and design of a dual-rotor axial-flux vernier permanent magnet machine

Zou, Tianjie; Qu, Ronghai; Li, Jian; Li, Dawei

Abstract

This paper proposes a dual-rotor, toroidal-winding, axial-flux vernier permanent magnet (VPM) machine. By the combination of toroidal windings with the rotor-stator-rotor topology, the end winding length of the machine is significantly reduced when compared with the regular VPM machine. Based on the airgap permeance function, the back-EMF and torque expressions are derived, through which the nature of this machine is revealed. The influence of pole ratio (ratio of rotor pole pair number to stator pole pair number) and main geometric parameters such as slot opening, magnet thickness etc., on torque performance is then analytically investigated. Both the quasi-3-dimensional (quasi-3D) finite element analysis (FEA) and 3D FEA are applied to verify the theoretical analysis. With the current density of 4.2 A/mm 2 , the torque density of the proposed machine can reach 32.6 kNm/m3. A prototype has been designed and is in manufacturing process. Experimental validation will be presented in the future.

Citation

Zou, T., Qu, R., Li, J., & Li, D. (2015, September). Analysis and design of a dual-rotor axial-flux vernier permanent magnet machine. Presented at 2015 IEEE Energy Conversion Congress and Exposition (ECCE), Montreal, QC, Canada

• Presentation Conference Type: Conference Paper (published)
• Conference Name: 2015 IEEE Energy Conversion Congress and Exposition (ECCE)
• Start Date: Sep 20, 2015
• End Date: Sep 24, 2015
• Online Publication Date: Oct 29, 2015
• Publication Date: 2015
• Deposit Date: Jun 24, 2024
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 3906-3913
• Series ISSN: 2329-3721
• Book Title: 2015 IEEE Energy Conversion Congress and Exposition (ECCE)
• DOI: https://doi.org/10.1109/ECCE.2015.7310212
• Public URL: https://nottingham-repository.worktribe.com/output/35431130