LOW VOLTAGE APPARATUS ›› 2022, Vol. 0 ›› Issue (10): 78-80.doi: 10.16628/j.cnki.2095-8188.2022.10.013

• Detection & Experiment • Previous Articles     Next Articles

Discussion on Inductance Measurement of DC Contactor Coil for New Energy Electric Vehicle at Power Failure Moment

HUANG Fang, ZHANG Lixi, ZHANG Yan   

  1. Zhejiang Fangyuan Electric Equipment Test Co.,Ltd., Jiaxing 314000, China
  • Received:2022-08-21 Online:2022-10-30 Published:2023-01-04

Abstract:

Aiming at the inductance measurement of DC contactor coil for new energy vehicles at the moment of power failure,a high sampling frequency recorder (or oscilloscope) is proposed to measure the maximum inductance of DC contactor coil at the moment of power failure by recording the current waveform of instantaneous coil disconnection.The recorder is used to measure the micro drop time of the contactor current,so as to calculate the inductance of the contactor coil at the moment of power failure,which can provide the key data for the power distribution unit (PDU) of new energy electric vehicles and ensure the design safety of the control system.

Key words: DC contactor, measurement, recorder, coil, inductor

CLC Number: