汽车工程 ›› 2022, Vol. 44 ›› Issue (4): 583-590.doi: 10.19562/j.chinasae.qcgc.2022.04.013

所属专题: 新能源汽车技术-电驱动&能量管理2022年

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电动汽车驱动系统直流母线稳定性分析

林程,孙建侠(),徐垚,易江   

  1. 北京理工大学,电动车辆国家工程实验室,北京  100081
  • 收稿日期:2021-08-20 修回日期:2021-10-08 出版日期:2022-04-25 发布日期:2022-04-22
  • 通讯作者: 孙建侠 E-mail:samantha4946@163.com
  • 基金资助:
    国家自然科学基金(51975049)

Stability Analysis of DC Bus of Electric Vehicle Drive System

Cheng Lin,Jianxia Sun(),Yao Xu,Jiang Yi   

  1. Beijing Institute of Technology,The National Engineering Laboratory of Electric Vehicles,Beijing  100081
  • Received:2021-08-20 Revised:2021-10-08 Online:2022-04-25 Published:2022-04-22
  • Contact: Jianxia Sun E-mail:samantha4946@163.com

摘要:

为提高电动汽车高压系统直流母线品质,基于稳定性分析原理提出了对驱动系统负载的限制要求。根据阻抗分析法建立了源/载侧阻抗模型,依据Middlebrook稳定判据推导了系统在全频域范围内的稳定条件,对接入直流母线的负载功率做出了明确限制。在此基础上,研究了通过源/载侧阻抗匹配提高系统稳定性的方法,为系统参数设计提供了理论依据。最后结合具体电动汽车实例,通过实验验证了分析结论。

关键词: 电动汽车, 直流母线, 阻抗分析法, 稳定条件, 阻抗匹配

Abstract:

In order to improve the dc bus quality of the high voltage system of electric vehicles, the load restriction requirements of the driving system are put forward based on the principle of stability analysis. Based on the impedance analysis method, the source/load side impedance model is established. According to the Middlebrook stability criterion, the stability conditions in the full frequency domain are deduced, and the power restriction for the load connected to the DC bus is clearly defined. Moreover, the system stability improvement by the source/load side impedance matching method is studied, which provides a theoretical basis for system parameters design. Finally, the analysis conclusion is verified by experiments combined with a specific electric vehicle.

Key words: electric vehicle, DC bus, impedance analysis method, stability condition, impedance matching