Research on the Non-Magnetic Conductor of a PMSM Based on the Principle of Variable Exciting Magnetic Reluctance

Chunyan Li, Fei Guo, Baoquan Kou and Tao Meng
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Chunyan Li: Department of Mechanical and Electrical Engineering, Heilongjiang University, Harbin 150080, China
Fei Guo: Department of Mechanical and Electrical Engineering, Heilongjiang University, Harbin 150080, China
Baoquan Kou: Department of Electrical Engineering, Harbin Institute of Technology, Harbin 150080, China
Tao Meng: Department of Mechanical and Electrical Engineering, Heilongjiang University, Harbin 150080, China

Energies, 2021, vol. 14, issue 2, 1-29

Abstract: A permanent magnet synchronous motor (PMSM) based on the principle of variable exciting magnetic reluctance (VMRPMSM) is presented. The motor is equipped with symmetrical non-magnetic conductors on both sides of the tangential magnetized permanent magnets (PMs). By placing the non-magnetic conductor (NMC), the magnetic reluctance in the exciting circuit is adjusted, and the flux weakening (FW) of the motor is realized. Hence, the NMC is studied comprehensively. On the basis of introducing the motor structure, the FW principle of this PMSM is described. The shape of the NMC is determined by analyzing and calculating the electromagnetic force (EF) acting on the PMs. We calculate the magnetic reluctance of the NMC and research on the effects of the NMC on electromagnetic force, d-axis and q-axis inductance and FW performance. The critical speeds from the test of the no-load back electromotive force (EMF) verify the correctness of the NMC design. The analysis is corresponding to the test result which lays the foundation of design for this kind of new PMSM.

Keywords: permanent magnet synchronous motor; variable magnetic reluctance; non-magnetic conductor; flux weakening (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
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