Analysis and Suppression of Spoke-Type Permanent Magnet Machines Cogging Torque with Different Conditions for Electric Vehicles
Abstract
:1. Introduction
2. Theoretical Analysis of Cogging Torque
2.1. Machine Topology
2.2. Analytical Model of Cogging Torque
2.3. Harmonics Analysis of Cogging Torque
3. Suppression of Cogging Torque
3.1. Rotor Slotting Width
3.2. Uneven Rotor Core
3.3. Uneven Stator Core
3.4. Stator Auxiliary Slotting
4. Experiment Validation
4.1. No-Load Performance
4.2. On-Load Performance
5. Conclusions
- (1)
- The cogging torque of the STPM machine is not only affected by stator slots but also significantly influenced by rotor slots. It is possible to minimize the cogging torque in STPM machine by selecting the proper rotor slot opening width.
- (2)
- The work condition shows a great influence on harmonic amplitudes of cogging torques due to magnetic saturation, and the no-load cogging torque is mainly caused by fundamental, but the on-load cogging torque is mainly caused by the 2nd harmonic and 3rd harmonic.
- (3)
- The suitable rotor slot width can suppress the harmonic content of cogging torque under different conditions, and the stator auxiliary slot can reduce the fundamental content under different conditions.
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Parameters | Value | Parameters | Value |
---|---|---|---|
Rated power (kW) | 40 | Peak power (kW) | 80 |
Rated torque (N·m) | 160 | Peak torque (N·m) | 300 |
PM thickness (mm) | 11 | PM width (mm) | 17 |
Outer diameter (mm) | 180 | Inner diameter (mm) | 120 |
Stack length (mm) | 180 | Air-gap length (mm) | 1 |
Turns per coil | 6 | Stator slots | 12 |
Pole pair | 5 | Number of phases | 3 |
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Huang, J.; Wang, C. Analysis and Suppression of Spoke-Type Permanent Magnet Machines Cogging Torque with Different Conditions for Electric Vehicles. World Electr. Veh. J. 2024, 15, 376. https://doi.org/10.3390/wevj15080376
Huang J, Wang C. Analysis and Suppression of Spoke-Type Permanent Magnet Machines Cogging Torque with Different Conditions for Electric Vehicles. World Electric Vehicle Journal. 2024; 15(8):376. https://doi.org/10.3390/wevj15080376
Chicago/Turabian StyleHuang, Jinlin, and Chen Wang. 2024. "Analysis and Suppression of Spoke-Type Permanent Magnet Machines Cogging Torque with Different Conditions for Electric Vehicles" World Electric Vehicle Journal 15, no. 8: 376. https://doi.org/10.3390/wevj15080376