一种新型螺管式电磁脱扣器的分析
刘志伟
（国网山东省电力公司潍坊供电公司, 山东 潍坊 261021）
摘 要：针对一种新型无静铁芯螺管式脱扣器结构，应用有限元分析软件Ansys计算其静态电磁吸力，并且对比分析了新型和传统型脱扣器的静态特性。运用Adams软件对微型断路器建模仿真开断过程，对比分析了新型与传统型脱扣器的动态特性以及其对MCB开断性能的影响。结果表明：新型脱扣器电磁吸力受气隙长度影响较小，随之减小而略有增大；在短路电流较小时，新型脱扣器动作时间较短，进而可以加快断路器的分断速度；在短路电流较大时，新型脱扣器没有体现出更好的速动性，也不能加快断路器的分断速度。
关键词：螺管式电磁脱扣器；静态特性；动态特性；分断速度；微型断路器
中图分类号：TM561 文献标识码：B 文章编号：1007-3175(2018)12-0044-06
Analysis of a New Type of Solenoid Electromagnetic Release
LIU Zhi-wei
（Weifang Power Supply Company of State Grid Corporation, Weifang 261021, China）
Abstract: In allusion to a new type of solenoid electromagnetic release structure without static iron core, the static state electromagnetic force was calculated with the finite element analysis software Ansys and the static characteristics of new and traditional solenoid magnetic release was analyzed and compared. The software Adams was used to carry out miniature circuit breaker modeling and making and breaking simulation. The dynamic characteristics of new and traditional solenoid magnetic release, as well as the impacts on the miniature circuit breaker were analyzed and compared. The results show that the magnetic force of new solenoid magnetic release was less influenced by gap length, which increases slightly with the decreases of gap length. The shorter tripping time of new release expedites the breaking process of circuit breaker under the condition of small short-circuit current. The new release hasn’t obvious speed and doesn’t expedite the breaking process of circuit breaker under the condition of large short-circuit current.
Key words: solenoid electromagnetic release; static characteristic; dynamic characteristic; breaking speed; miniature circuit breaker
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