| Title |
Operating Status Decision Of Gas Sealed DC Contactor by Coil Current Change Pattern |
| Authors |
차승우(Seung-Woo Cha) ; 김종빈(Jong-Bin Kim) ; 이민구(Min-Goo Lee) ; 박광재(Kwang-Jae Park) ; 김재언(Jae-Eon Kim) |
| DOI |
https://doi.org/10.5370/KIEE.2024.73.2.395 |
| Keywords |
DC Contactor; EV-Relay; DC-Relay; Control coil current; Operating status measurement; Detecting defect |
| Abstract |
As electric vehicles and LVDC distribution systems expand, demands for DC contactor are increasing. DC Contactor is a device that acts as a switch in the system, and the most important performance is the stability of operation. To check if the on-off operation is normal or not, the pickup voltage applied to the control coil is measured and judged until now. However, it is difficult to confirm the complete operating on-off state of DC contactor by it. In order to solve this problem, this paper presents a method to determine whether DC contactor is completely on or off through some changes in the control coil current. A theoretical basis is presented to explain the change in electromotive force, and it is verified that the method is able to accurately determine the on-off state through experiments. |