Effect of Slot Opening on Permanent Magnet Power Loss of a Permanent Magnet Synchronous Machine Driven by PWM

Guohui Yang (), Xiaolu Wang, Chaofan Yang, Danyang Wang, Hao Wu and Xin Wang
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Guohui Yang: Laboratory of Aerospace Servo Actuation and Transmission (LASAT), Beijing Institute of Precision Mechatronics and Controls, Beijing 100076, China
Xiaolu Wang: Laboratory of Aerospace Servo Actuation and Transmission (LASAT), Beijing Institute of Precision Mechatronics and Controls, Beijing 100076, China
Chaofan Yang: Laboratory of Aerospace Servo Actuation and Transmission (LASAT), Beijing Institute of Precision Mechatronics and Controls, Beijing 100076, China
Danyang Wang: Laboratory of Aerospace Servo Actuation and Transmission (LASAT), Beijing Institute of Precision Mechatronics and Controls, Beijing 100076, China
Hao Wu: Laboratory of Aerospace Servo Actuation and Transmission (LASAT), Beijing Institute of Precision Mechatronics and Controls, Beijing 100076, China
Xin Wang: Laboratory of Aerospace Servo Actuation and Transmission (LASAT), Beijing Institute of Precision Mechatronics and Controls, Beijing 100076, China

Energies, 2022, vol. 15, issue 20, 1-10

Abstract: In this study, the influence of slot opening on the leakage reactance, power factors, winding current, and air gap flux density, as well as other parameters of the surface-mounted permanent magnet synchronous motor driven by an inverter is analyzed using the two-dimensional time-step finite element method. Thus, the law of permanent magnet power loss caused by slot opening under PWM qa obtained. The results show that the leakage reactance of the motor increased when the slot opening decreased from 7 mm to 2 mm. Then, the armature ripple current caused by the inverter was found to be suppressed well, and the high harmonic current was filtered well. This reduced the amplitude of the high-order harmonic of the air gap flux density, and the permanent magnet power loss was reduced by nearly 75%. Finally, two prototypes with different slot openings were tested for permanent magnet temperature rise, which verified the analysis method and calculation results proven in this paper.

Keywords: permanent magnet loss; finite element method (FEM); permanent magnetic synchronous machine (PMSM); inverter driving (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: 2022
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