Research on Characteristics of Cogging Torque of Permanent Magnet Synchronous Motor Based on Finite Element Method

Abstract:

This paper presents a method of reducing cogging torque of Permanent Magnet Synchronous Motor (PMSM) based on Finite Element Method (FEM). Cogging torque can be reduced by pole and slot number combination and the length of air gap reasonably. An investigation into the cogging torque in 4 pole, 48 slot and 6 pole, 54 slot interior-magnet machines with overlapping winding is described. The calculation results show that cogging torque can be reduced by nearly 50% by pole and slot number combination reasonably. Then influence of different length of air gap on cogging torque is also researched. Cogging torque can be weaken by increasing the length of air gap effectively, the smoothness of the motor running can be improved.

• Periodical: Applied Mechanics and Materials (Volumes 313-314)
• Pages: 37-40
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.313-314.37
• Online since: March 2013
• Authors: Shen Bo Yu, Shen Cao, Lei Li, Feng Yi Xiao
• Keywords: Cogging Torque, Length of Air Gap, Permanent Magnet Synchronous Motor

References

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