Abstract：The distribution system of rail transit traction system is generally supplied by dc power , and its rated voltage and current are generally kV and kA levels. Therefore, as a key component of the distribution system, the demand for various types of DC high-power contactors is further and further. The core problem that restricts the development of the product is the arc extinguishing ability and the arc extinguishing speed of the chamber under the inductive load of high DC power. Based on this problem, arc characteristics of a self-blowing arc extinguishing chamber are studied in this paper. The distribution of the self-blowing arc magnetic field generated by the main contact flowing through different DC currents in the arc extinguishing chamber is obtained through simulation. The characteristics of the breaking arc and the energy of arc burning are compared and analyzed under the inductive load of different time constants and resistance. The contactor with self-blowing arc-extinguishing chamber has the ability to break the inductive DC load with high voltage, large current and large time constant, which has strong practical application value and theoretical research significance.
周学, 周雨馨, 孙会超, 翟国富. 直流大功率接触器自磁场灭弧室电弧特性研究[J]. 电工技术学报, 2021, 36(zk1): 292-302.
Zhou Xue, Zhou Yuxin, Sun Huichao, Zhai Guofu. Study on Arc Characteristics in a Self-Blowing Arc Chamber for a DC High Power Contactor. Transactions of China Electrotechnical Society, 2021, 36(zk1): 292-302.
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2021, Vol. 36 
