Effect of Stator Slots on Electromagnetic Performance of a High-Voltage Line-Start Permanent Magnet Synchronous Motor

Dongming Li, Guihong Feng, Wei Li, Bingyi Zhang and Jiaxu Zhang
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Dongming Li: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Guihong Feng: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China
Wei 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
Jiaxu Zhang: School of Electrical Engineering, Shenyang University of Technology, Shenyang 110870, China

Energies, 2022, vol. 15, issue 9, 1-18

Abstract: It is well known that the use of slotted stators in motors produces undesirable effects, such as magnetic flux distortion, additional losses, ripple torque, and vibration. However, a large number of studies pay more attention to stator slots and magnetic slot wedges (MSW) in asynchronous motors and permanent magnet motors, ignoring the same problems in large capacity high voltage line start permanent magnet synchronous motors (HVLSPMSM). In order to disclose the effect of the stator slot on HVLSPMSMs, the no-load air gap magnetic field distribution and stator leakage reactance are studied. Meanwhile, the differences in the starting torque, pull-in torque and pull-out torque of four slot models are compared, and the starting performance is more affected by stator slot. In practical manufacturing, the application of MSWs is the main way to change the electromagnetic performance of stator slots, so the influence of MSWs under different permeabilities on the performance of HVLSPMSMs is investigated. Finally, the effect of a stator slot on the motor starting performance and the rated performance are verified by prototypes and experimental tests, which provide a reference for the application of MSWs in HVLSPMSMs.

Keywords: line-start permanent magnet synchronous motor (LSPMSM); stator slot; magnetic slot wedge; stator leakage reactance; starting torque; pull-in torque; starting process (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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