Abstract
This paper investigates cogging torque reduction methods using canceling effect for dual-stator permanent magnet synchronous machines (PMSM). The cogging torque in dual-stator PMSMs can be calculated by the superposition of both cogging torque components from outer and inner stator parts neglecting the saturation effect. If out and inner parts have the same least common multiple of pole/slot number combination, both cogging torque components share the same harmonic contents. Therefore, the cogging torque harmonics from both components can be cancelling or additive, which depends on their phase angle difference. In addition to the relative position shift between inner and outer stators, this paper proposes more options using the canceling effect, such as relative position shift between inner/outer magnet poles, inner/outer slot number pairing, size pairing of inner/outer slot openings, and size pairing of inner/outer pole-arc to pole-pitch ratios. The investigation shows all these methods can effectively reduce the cogging torque. The analysis is verified by direct finite element results.
Original language | English |
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Title of host publication | 2019 IEEE International Electric Machines and Drives Conference, IEMDC 2019 |
Number of pages | 7 |
Publisher | IEEE |
Publication date | May 2019 |
Pages | 714-720 |
Article number | 8785112 |
ISBN (Electronic) | 9781538693490 |
DOIs | |
Publication status | Published - May 2019 |
Event | 11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 - San Diego, United States Duration: 12 May 2019 → 15 May 2019 |
Conference
Conference | 11th IEEE International Electric Machines and Drives Conference, IEMDC 2019 |
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Country/Territory | United States |
City | San Diego |
Period | 12/05/2019 → 15/05/2019 |
Sponsor | IEEE Industrial Electronics Society (IES), IEEE Industry Applications Society (IAS), IEEE Power and Energy Society (PES), IEEE Power Electronics Society (PELS) |
Bibliographical note
Funding Information:ACKNOWLEDGMENT This work was supported by the National Natural Science Foundation of China under Grant 51677169 and 51637009.
Publisher Copyright:
© 2019 IEEE.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
Keywords
- Canceling effect
- Cogging torque
- Dual-stator
- Permanent-magnet machine