断路器瞬时脱扣装置脱扣电流的设计研究  

Design and Research of Instantaneous Tripping Device for Circuit Breakers

作　　者：耿丽恺 侯娟 张春香 胡文英 李文华[3] 李翠娟 GENG Likai;HOU Juan;ZHANG Chunxiang;HU Wenying;LI Wenhua;LI Cuijuan(Tianjin Tianchuan Electric Control Equipment Test Co.,Ltd.,Tianjin 300300,China;Tianjin Research Institute of Electric Science Co.,Ltd.,Tianjin 300180,China;School of Electrical Engineering,Hebei University of Technology,Tianjin 300401,China;Jiaozhou Branch of Qingdao Municipal Bureau of Ecology and Environment,Qingdao 266300,Shandong,China)

机构地区：[1]天津天传电控设备检测有限公司,天津300300 [2]天津电气科学研究院有限公司,天津300180 [3]河北工业大学电气工程学院,天津300401 [4]青岛市生态环境局胶州分局,山东青岛266300

出　　处：《电气传动》2025年第3期91-96,共6页Electric Drive

基　　金：天津电气科学研究院有限公司自立科研项目(JC2023ZL005)。

摘　　要：热磁式断路器通过瞬时脱扣装置进行短路保护。在通电线圈形成的磁场中,动、静铁心在电磁力的作用下克服弹簧反力吸合,进而推动断路器机构动作使产品脱扣。整个过程中只有电磁力达到一定的数值,动、静铁心才能在预设定的电流值下可靠地吸合。在实际的工程设计过程中,为了简化设计及计算过程,会忽略漏磁等问题,故理论计算得出的磁吸力,即弹簧反力值会小于预设目标。通过类比计算的方法,可以直接剔除漏磁和制作工艺过程中零件制作精度对试验结果的影响,一次完成瞬时脱扣装置的设计。最后,通过实际应用案例来说明如何通过理论计算和试验结合的方式,准确快速地设计出瞬时脱扣装置脱扣电流的方法。Thermal and magnetic protection circuit breakers provided short circuit protection by instantaneous tripping devices.In the magnetic field formed by the coil with current,the moving armature and stationary core overcomed the spring force and engage under the influence of electromagnetic force,thereby pushing the circuit breaker mechanism to operate and causing the product tripping.During the entire process,only when the electromagnetic force reaches a certain value could be the moving armature and stationary core reliably engage at the preset current value.In actual engineering design,in order to simplify the design and calculation process,issues such as magnetic leakage may be ignored.Therefore,the theoretical calculated magnetic attraction force,i.e.spring reaction force,will be smaller than the preset target.By analogy calculation method,it is possible to directly eliminate the influence of magnetic leakage and part manufacturing accuracy on the test results during the manufacturing process,and complete the design of the instantaneous release device once.Finally,practical application cases were used to illustrate how to accurately and quickly design an instantaneous release devices through a combination of theoretical calculations and experiments.

关 键 词：断路器 瞬时脱扣装置 脱扣电流 脱扣电流的检测 类比计算 

分 类 号：TM561[电气工程—电器]