Static and Dynamic Magnetic Pull in Modular Spoke-Type Permanent Magnet Motors

Shaonan Sun, Guihong Feng (), Yan Li and Bingyi Zhang
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Shaonan Sun: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Guihong Feng: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Yan Li: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Bingyi Zhang: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China

Energies, 2023, vol. 16, issue 10, 1-18

Abstract: This work studied the static magnetic pull of a modular spoke-type permanent magnet motor (MSTPMM) with no rotor eccentricity during the motor’s final assembly process and its dynamic magnetic pull during different motor operating states. A new final assembly scheme was proposed to significantly reduce the static magnetic pull during the final assembly process of the motor. The methods required to reduce the unbalanced radial magnetic pull of the whole stator, which is caused by partial stator module operation, were also studied. Firstly, the structure of the MSTPMM was examined. The static magnetic pull that occurred with the implementation of the two motor final assembly methods was studied in order to prove the effectiveness of reducing the maximum static magnetic pull. Moreover, the maximum magnetic pull during the assembly process was also observed. Then, the dynamic magnetic pull was studied with different motor operating states: no load, on load, and partial stator module operation. To solve the unbalanced radial magnetic pull of the whole stator, which is caused by partial stator module operation, methods of changing the angle between the stator current vector and the q axis ( Ψ ) or the d axis current ( i d ) were also studied.

Keywords: static magnetic pull; dynamic magnetic pull; modular spoke-type permanent magnet motor (MSTPMM); final assembly (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: 2023
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