基于磁流体动力学仿真的小型直流断路器灭弧性能的提升

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琚珈琪（1998—），男，硕士研究生，研究方向为小型直流断路器。

关键词：直流；改进前后灭弧室；产气材料；灭弧性能

中图分类号：TM56 文献标志码：A 文章编号：2095-8188（2026）01-0016-09

DOI：10.16628/j. cnki.2095-8188.2026.01.003

Improvement of Arc-Extinguishing Performance of Small DC Circuit Breakers Based on Magnetohydrodynamic Simulation

JU Jiaqi，LI Jing'，L Ziqi² （1.School of Electrical and Electronic Engineering，Wenzhou University，Wenzhou 325035，China; 2.Zhejiang Keruipu Electric Co.，Ltd.，Wenzhou 325603，China）

Abstract：To enhance the arc-extinguishing performance of small DC circuit breakers，the principles related to DC arcsare reviewed，and three types of arc splitter plates with different lengthsare designed.Modeling and simulation are carried out onthe arcchamber of aspecific small DC circuit breakerbefore and after improvement. The simulation results show that the arc-extinguishing performanceof the improvedarc chamberis betterthan thatof theoriginalone.Underdifferent inletvelocities，thehigher the inlet velocity，thebeter thearc-extinguishing performance.Three types of testprototypes are manufactured，and electrical endurance testsare conducted in accordance with GB/T14048.2—202O Low-Voltage Suitchgear and Controlgear—Part2：Circuit breakers.The make-break time of each openingand closing operation is recorded andaveraged.The test resultsshow that the averagemake-break timeof the prototype with theimprovedarcchamber isshorter，and theaverage make-break time of the prototype with gas-generating material placedabove the moving andstationarycontacts isalso shorter. The consistency between thesimulationandtestresultsisverified，which provides areference forproduct performance optimization.

Key words：DC circuit breaker；arc extinguishing chambers before and after improvement；gasgenerating materials;arc extinguishing performance

0 引言

在“双碳”战略目标的政策驱动下，中国低压电器市场呈现显著的增长态势。（剩余9409字）