Multi-pole ratio single-winding pole-changing permanent magnet motor design and analysis

Liyan Guo; Yi Yang; Huimin Wang

Multi-pole ratio single-winding pole-changing permanent magnet motor design and analysis

Liyan Guo

Yi Yang

Huimin Wang

Vol. 24, No. 12, pp. 1979-1989, Dec. 2024

10.1007/s43236-024-00870-w

High-speed

PCPM motor

Single-winding

Multi-pole ratio pole-changing

FEA

Abstract

Pole-changing permanent magnet (PCPM) motors have advantages over traditional permanent magnet synchronous motors (PMSM) in high-speed applications. However, changing the pole number of a motor requires reconstructing the stator winding. This increases both the cost and complexity. To solve this problem, a new type of single-winding PCPM motor with a pole-slot combination satisfying the rule of 2pa + 2pb = Z (the sum of the number of poles of the motor before and after the pole-changing is equal to the number of slots) is proposed in this paper. The multi-pole ratio pole-changing of the PCPM motor can be realized by combining the single-winding structure with another single-winding structure that satisfies the pa + pb = Z (the sum of the number of pole pairs of the motor before and after the pole-changing is equal to the number of slots) rule. Through this method, there is no need to reconstruct the stator winding when a pole is changed, Only by changing the phase sequence and direction of the armature current, the switching process is rapid, and the online pole-changing can be realized. This single-winding pole-changing method can flexibly realize the conversion of three pole number modes without increasing the additional winding cost and complexity. Finally, the rationality of the proposed pole-changing method is verified by finite element analysis (FEA).

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Cite this article

[IEEE Style]

L. Guo, Y. Yang, H. Wang, "Multi-pole ratio single-winding pole-changing permanent magnet motor design and analysis," Journal of Power Electronics, vol. 24, no. 12, pp. 1979-1989, 2024. DOI: 10.1007/s43236-024-00870-w.

[ACM Style]

Liyan Guo, Yi Yang, and Huimin Wang. 2024. Multi-pole ratio single-winding pole-changing permanent magnet motor design and analysis. Journal of Power Electronics, 24, 12, (2024), 1979-1989. DOI: 10.1007/s43236-024-00870-w.