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Segment design of the complementary magnetic-geared dual-rotor motor for hybrid electric vehicles

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Abstract

Magnetic-geared dual-rotor motor (MGDRM) has been considered as a promising candidate of the power split device in the hybrid electric vehicles. Essentially, the MGDRM is a pure electrical component without the brush, slip ring and mechanical gears, so its reliability and lifetime can perform well. However, the design principle of the MGDRM has not been fully transferred to a practical technology. The asymmetrical back-EMF of this motor is an issue, which is a sake of the torque ripple produced by the MGDRM. The complementary structure has been proposed to improve the back-EMF, but some detailed problems of this solution have not been addressed. This paper gives the analysis and discussion on the segment design of the complementary MGDRM. Two prototype machines are also fabricated for the experimental validation of the research results.

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Abbreviations

Pin, Tin :

Input mechanical power and torque (outer rotor

P e :

Output electrical power (winding)

Ptr, Ttr :

Output traction power and torque (inner rotor

φ v :

Outer air gap flux with v pole-pairs

θ :

Position on the outer air gap circumference

θir, pir :

Inner rotor position and pole-pair number

θor, por :

Outer rotor position and pole-pair number

Δθir0, Δθor0 :

Initial angles shift of inner and outer rotor

a l :

Amplitudes of the magneto-motive force harmonics

c m :

Fourier coefficients of permeance distributions

N :

General segment number along the axial direction

D so :

Outside diameter of stator

L e :

Stator/rotor stack length

θ os :

Angle shift of the riveting holes for assembling

w b :

Width of the flux barrier

η e :

Power conversion efficiency

η split :

Power split efficiency

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Acknowledgements

This work is supported by the Shenzhen Science and Technology Innovation Committee (STIC) (JCYJ20170817164807994) and the Science and Technology Project of Guangxi Power Grid (0401002018030103WX00100).

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Authors and Affiliations

  1. School of Electrical Engineering and Automation, Anhui University, Hefei, China

    Shichuan Ding & Min Cheng

  2. Shenzhen Research Institute, Southeast University, Shenzhen, China

    Jun Hang

  3. School of Automation, Nanjing University of Science and Technology, Nanjing, China

    Le Sun

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  1. Shichuan Ding
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  2. Min Cheng
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  3. Jun Hang
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  4. Le Sun
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Correspondence to Jun Hang.

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Ding, S., Cheng, M., Hang, J. et al. Segment design of the complementary magnetic-geared dual-rotor motor for hybrid electric vehicles. Electr Eng 102, 2109–2122 (2020). https://doi.org/10.1007/s00202-020-01013-7

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  • DOI: https://doi.org/10.1007/s00202-020-01013-7

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