Study on electromechanical coupling inherent vibration characteristics and parameter influencing law of EMT system used in HEV

Hui Liu, Yunkun Xie, Yunhao Wu*, Pu Gao, Lijin Han, Changle Xiang, Yue Ma, Keyu Yan, Qi Yan, Jiangtao Gai, Zhibin Shuai

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

As high-speed, heavy-load, and high-power density are realized in hybrid electric vehicle (HEV), the electromechanical coupling inherent vibration of electromechanical composite transmission (EMT) system becomes the bottleneck in this study area. To reduce vibration, the analysis of inherent vibration characteristics of EMT system and parameter influencing law of mechanical-electro-magnetic parameter is key. Here, an electromechanical coupling dynamics model is established considering multi-source excitations, and the inherent vibration model is obtained. Based on this inherent vibration model, firstly, the inherent vibration frequency and mode with and without electromagnetic effect of EMT system are studied and summarized. Secondly, the resonance speed of EMT system is identified based on Campbell diagram and modal energy method. Thirdly, the inherent frequency trajectory and variation law affected by PMSM parameters (inner power factor angle (IPFA), armature current, stator-rotor eccentricity) and the mode mutations phenomenon of inherent frequency trajectory caused by PG parameter (connecting, gear meshing, and bearing support stiffness) are studied. This study results provide a reference for the modeling and analysis of inherent vibration characteristics, as well as the design and optimization of mechanical-electro-magnetic parameter of EMT system.

Original languageEnglish
Pages (from-to)351-372
Number of pages22
JournalProceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering
Volume239
Issue number1
DOIs
Publication statusPublished - Jan 2025

Keywords

  • Hybrid electric vehicle (HEV)
  • electromechanical composite transmission system (EMT)
  • electromechanical coupling inherent vibration
  • multi-source excitations
  • parameter influencing law

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Liu, H., Xie, Y., Wu, Y., Gao, P., Han, L., Xiang, C., Ma, Y., Yan, K., Yan, Q., Gai, J., & Shuai, Z. (2025). Study on electromechanical coupling inherent vibration characteristics and parameter influencing law of EMT system used in HEV. Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 239(1), 351-372. https://doi.org/10.1177/09544070231203273