Affiliations: [a] Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, China | [b] University of Chinese Academy of Sciences, Beijing, China | [c] Zhejiang Key Laboratory of Robotics and Intelligent Manufacturing Equipment Technology, Ningbo, China
Correspondence:
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Corresponding author: Chi Zhang, Institute of Advanced Manufacturing Technology, Ningbo Institute of Materials Technology & Engineering, Chinese Academy of Sciences, No. 1219, Zhongguan West Street, Zhejiang 315201, China. E-mail: zhangchi@nimte.ac.cn
Abstract: This paper presents a nonlinear iterative magnetic equivalent circuit (MEC) model for a novel counter-rotation dual-rotor axial flux permanent magnet synchronous machine (CRDR-AFPMSM). The proposed machine mainly consists of two rotors with opposite rotation directions, two sets of concentrated windings and a stator core sandwiched in between the two rotors. The model takes into account of the nonlinear characteristics of the saturable permeance in the stator core, and the permeance matrix is updated by an iterative procedure to accurately illustrate its nonlinear feature. The air gap flux density, back electromotive force (EMF) and torque are predicted by the model. Based on the nonlinear model, the thickness of the stator yoke is determined. All of the results obtained by the proposed model match with finite element analysis (FEA) results closely, thus the validity of the proposed MEC model is verified.
Keywords: Counter-rotation dual-rotor flux permanent magnet synchronous machine (CRDR-AFPMSM), nonlinear magnetic equivalent (MEC), saturable permeance, finite element analysis (FEA)
