Design Principles and Calculation Criteria for Skewed Notches in PM Motors

Siwei Ji, Yukai Li, Huanyu Ou and Wenlong Tian ()
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Siwei Ji: School of Marine Science and Technology, Northwestern Polytechnic University, Xi’an 710072, China
Yukai Li: No. 38 Research Institute of China Electronics Technology Group Corporation (CETC), Hefei 230028, China
Huanyu Ou: School of Marine Science and Technology, Northwestern Polytechnic University, Xi’an 710072, China
Wenlong Tian: School of Marine Science and Technology, Northwestern Polytechnic University, Xi’an 710072, China

Energies, 2023, vol. 16, issue 9, 1-11

Abstract: The stator structure is one of the main factors affecting the electromagnetic performance of permanent magnet (PM) motors. In this paper, an in-depth study and analysis of how to reduce the cogging torque is carried out from the perspective of the stator structure. According to the theory of cogging torque synthesis, this paper presents a unified calculation formula for different PM motor skewed notch designs. This theory is verified with a 20-pole, 60-slot motor and a 20-pole, 24-slot motor, respectively. The formula worked out proved to be highly applicable. The formula is intended to address how to quickly obtain key data (skew angle, notch depth) in a skewed notch study.

Keywords: skewed notch design; PM machine; cogging torque reduction (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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