Modeling and simulation study on the ablation characteristics of DC contactor contact
Source abstract
Abstract
The DC contactor can frequently break the high current control circuit, and the arc motion characteristic in the current breaking process is closely related to its electrical life and reliability. In this paper, a three-dimensional magnetohydrodynamic arc model of the DC contactor considering contact motion and external circuit characteristics is established. On this basis, the influence of the vapor produced by the contact ablation on the arc behavior is studied, and the ablation rate of the cathode in a single breaking process is calculated. The results show that the arc temperature is reduced, the motion speed is slowed down, and the arc burning time is shortened due to the presence of copper vapor produced by ablation. The ablation rate of the cathode during a single arc is 8.9 µg/C.
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Research context
OpenAlex topics: Vacuum and Plasma Arcs · Electrical Contact Performance and Analysis · Diamond and Carbon-based Materials Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Hunan Province Key Laboratory of Intelligent Electrical Measurement and Application Technology, State Grid Hunan Electric Power Limited Company Power Supply Service Center (Metrology Center) 1 , Changsha 41004, China
State Grid Hunan Electric Power Limited Company 2 , Changsha 41004, China
State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology 3 , Tianjin 300130, China
Funding
State Grid Hunan Electric Power Co., Ltd. Technology Project
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