A Parameterized Modeling Method for Magnetic Circuits of Adjustable Permanent Magnet Couplers

Dazhi Wang, Wenhui Li (), Jiaxing Wang, Keling Song, Yongliang Ni and Yanming Li
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Dazhi Wang: College of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Wenhui Li: College of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Jiaxing Wang: College of Information Science and Engineering, Northeastern University, Shenyang 110819, China
Keling Song: China Northern Vehicle Research Institute, Beijing 100072, China
Yongliang Ni: China Northern Vehicle Research Institute, Beijing 100072, China
Yanming Li: China Northern Vehicle Research Institute, Beijing 100072, China

Mathematics, 2023, vol. 11, issue 23, 1-18

Abstract: The contactless transmission between the conductor rotor and the permanent magnet (PM) rotor of an adjustable permanent magnet coupler (APMC) provides the device with significant tolerance for alignment errors, making the performance estimation complicated and inaccurate. The first proposal of an edge coefficient in this paper helps to describe the edge effect with better accuracy. Accurate equivalent magnetic circuit (EMC) models of the APMC are established for each region. Models of magnetic flux, magnetic resistance, and eddy current density are established by defining the equivalent dimensional parameters of the eddy current circuit. Furthermore, the concept of magnetic inductance is proposed for the first time, parameterizing eddy currents that are difficult to describe with physical models and achieving the modeling of the dynamic eddy current circuit. The magnetic resistance is subdivided into two parts corresponding to the output and slip according to the power relationship. Furthermore, eddy current loss and dynamic torque models are further derived. The method proposed in this paper enables the APMC to be modeled and calculated in a completely new way. The correctness and accuracy of the model have been fully demonstrated using finite element simulation and an experimental prototype. In addition, the limitations of the proposed method and the reasons are fully discussed and investigated.

Keywords: adjustable permanent magnet coupler; equivalent magnetic circuit; electromagnetic field analytical modeling; parametric expression of eddy current circuit; performance estimation; finite element analysis; prototype verification (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2023
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