Analysis of an IPMSM Hybrid Magnetic Equivalent Circuit

In-Soo Song, Byoung-Wook Jo and Ki-Chan Kim
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In-Soo Song: Department of Electrical Engineering, Hanbat National University, Daejeon 31458, Korea
Byoung-Wook Jo: Division of Eco-Friendly Vehicle R&D, Korea Automotive Technology Institute, Cheonan 31214, Korea
Ki-Chan Kim: Department of Electrical Engineering, Hanbat National University, Daejeon 31458, Korea

Energies, 2021, vol. 14, issue 16, 1-17

Abstract: The most common type of electric vehicle traction motor is the interior permanent magnet synchronous motor (IPMSM). For IPMSM designs, engineers make use of the magnetic equivalent circuit method, which is a lumped constant circuit method, and the finite element method, which is a distributed constant circuit method. The magnetic equivalent circuit method is useful for simple design through fast and intuitive parameters, but it cannot derive the distribution of the magnetic field. The finite element method can derive an accurate magnetic field distribution, but it takes a long time and is difficult to use for analysis of intuitive design parameters. In this study, the magnetic equivalent circuit method and Carter’s coefficient were combined for rotor structure design and accurate identification and analysis of circuit constants. In this paper, this design method is called the hybrid magnetic equivalent circuit method. Intuitive design parameters are derived through this hybrid magnetic equivalent circuit method. The air gap flux density distribution according to rotor shape, no-load-induced voltage, and cogging torque was analyzed and compared to results of the finite element method. The proposed method was found to achieve a short solving time and acceptably accurate results.

Keywords: finite element method; hybrid magnetic equivalent circuit; the air gap flux density distribution; rotor shape (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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