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Electromechanical Coupling Dynamic Characteristics of the Dual-Motor Electric Drive System of Hybrid Electric Vehicles

Author

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  • Shuaishuai Ge

    (School of Instrument Science and Opto-Electronics Engineering, Hefei University of Technology, Hefei 230009, China
    Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, China)

  • Shuang Hou

    (Key Laboratory of Advanced Manufacturing Technology for Automobile Parts, Ministry of Education, Chongqing University of Technology, Chongqing 400054, China)

  • Mingyao Yao

    (School of Automotive and Transportation Engineering, Hefei University of Technology, Hefei 230009, China)

Abstract

The electric mode is the main operational mode of dual-motor hybrid electric vehicles (HEVs), so the reliability of the dual-motor electric drive system (DEDS) is particularly important. To research the electromechanical coupling mechanism of the DEDS of HEVs, firstly, considering the time-varying mesh stiffness of gears and the nonlinear characteristics of inverters, an electromechanical coupling dynamics model of the DEDS was established, including the permanent magnet synchronous motor (PMSM) and the gear transmission system. Then, the electromechanical coupled dynamic characteristics of the DEDS in the single-motor and dual-motor drive modes were analyzed under steady-state and impact load conditions, respectively. The results show that the motor stator current frequency is modulated by the complicated gear meshing frequency, and the operation state of the gear transmission system can thus be monitored in the stator current. Impact load causes the instantaneous torsional vibration of the transmission system dominated by the first-order natural frequency, and the vibration characteristic frequency appears in the form of a side frequency in the stator current signal; moreover, compared with the single-motor drive mode, the speed synchronization error in the dual-motor drive mode will aggravate torsional vibration in the gear system. The impact energy of the gear system caused by external impact load can be suppressed by reducing the speed synchronization error.

Suggested Citation

  • Shuaishuai Ge & Shuang Hou & Mingyao Yao, 2023. "Electromechanical Coupling Dynamic Characteristics of the Dual-Motor Electric Drive System of Hybrid Electric Vehicles," Energies, MDPI, vol. 16(7), pages 1-23, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:3190-:d:1113509
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    References listed on IDEAS

    as
    1. Qiushi Zhang & Ying Fan, 2022. "The Online Parameter Identification Method of Permanent Magnet Synchronous Machine under Low-Speed Region Considering the Inverter Nonlinearity," Energies, MDPI, vol. 15(12), pages 1-17, June.
    2. Ka Zhang & Jianwei Yang & Changdong Liu & Jinhai Wang & Dechen Yao, 2022. "Dynamic Characteristics of a Traction Drive System in High-Speed Train Based on Electromechanical Coupling Modeling under Variable Conditions," Energies, MDPI, vol. 15(3), pages 1-20, February.
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