Mechanism research on coupling leakage current of traction transmission system of EMU

Liang Lou; Chunjun Chen

doi:10.1117/12.2684548

19 October 2023 Mechanism research on coupling leakage current of traction transmission system of EMU

Liang Lou, Chunjun Chen

Proceedings Volume 12709, Fourth International Conference on Artificial Intelligence and Electromechanical Automation (AIEA 2023); 127095O (2023) https://doi.org/10.1117/12.2684548
Event: Fourth International Conference on Artificial Intelligence and Electromechanical Automation (AIEA 2023), 2023, Nanjing, China

Abstract

The coupling is an important part of the traction transmission system of EMU, but the relevant units found that the suspected striated electric corrosion marks appeared on the coupling tooth surface after the EMU had been running for a long time, and the laboratory test results showed that there was coupling leakage current when the traction motor was running. In view of this problem, this paper has carried out theoretical and experimental research on the mechanism of coupling leakage current of traction transmission system. The theoretical analysis results show that the main components of the coupling leakage current formed by the common mode voltage are the frequency component of odd multiple carrier and the frequency component of carrier sideband harmonic, while the main components of the coupling leakage current formed by the magnetic asymmetry of motor are the fundamental frequency component of the power supply. The loop line test of the existing vehicle was carried out. Through the analysis of the measured data, it was found that the main component of the measured coupling leakage current under acceleration, constant speed and deceleration conditions was the fundamental frequency component of the power supply. According to the theoretical analysis and test results, the coupling leakage current is caused by magnetic asymmetry of motor.

Citation Download Citation

Liang Lou and Chunjun Chen "Mechanism research on coupling leakage current of traction transmission system of EMU", Proc. SPIE 12709, Fourth International Conference on Artificial Intelligence and Electromechanical Automation (AIEA 2023), 127095O (19 October 2023); https://doi.org/10.1117/12.2684548

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