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Characteristic Analysis and Optimization of U-PM Vernier Machine with Alternating Flux Bridge

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Abstract

Spoke array permanent magnet vernier machine (SA-PMVM) has higher torque density due to the flux focusing effect. However, the torque increase caused by the magnetic barrier effect is not obvious in the high pole ratio. In order to improve the working flux density and torque density of PMVM, this paper presents a U-PM vernier machine with alternating flux bridges. The model adds alternating flux bridges in the rotor core to provide a flux path for low pole-pair working magnetic field. Compare with the spoke array permanent magnet (SA-PM) structure, the U-type permanent magnet (U-PM) can better push the magnetic flux into the rotor pole, thereby improving the magnetic flux density of the low-order working harmonics. According to the sensitivity of the parameters, the response surface method (RSM) and single parameter scanning are used to determine the optimal structural parameters of the machine. Based on the two-dimensional finite element method, the electromagnetic performance of the optimized machine is compared with that of the SA-PMVM. The results show that the performance of the optimized machine is significantly better than that of the SA-PMVM.

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Acknowledgements

This work was supported by National Natural Science Foundation of China (Project No. 51707072).

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Authors and Affiliations

  1. Hubei Provincial Engineering Technology Research Center for Microgrid, College of Electrical Engineering and New Energy, China Three Gorges University, Yichang, China

    Libing **g, Zhangtao Kui, Kun Yang & Zeyu Min

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  1. Libing **g
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  2. Zhangtao Kui
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  3. Kun Yang
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  4. Zeyu Min
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Correspondence to Libing **g.

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**g, L., Kui, Z., Yang, K. et al. Characteristic Analysis and Optimization of U-PM Vernier Machine with Alternating Flux Bridge. J. Electr. Eng. Technol. 18, 281–290 (2023). https://doi.org/10.1007/s42835-022-01313-x

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  • DOI: https://doi.org/10.1007/s42835-022-01313-x

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