三相分立式断路器的新型永磁机构

New Permanent Magnetic Actuator for Three Phase Discrete Circuit Breaker

针对三相分立式永磁机构断路器对其配套永磁机构的小型化、低电压、小电流、大保持力等特殊要求,设计并研发了一套新型永磁机构。笔者主要研究在较低电压下永磁机构的分、合闸过程中动铁心的位移、速度等机械参数与时间的关系,确定线圈电流、静态保持力等优化参数。采用有限元法对永磁机构进行分析研究,在Maxwell 2D建立了永磁机构的仿真模型,并根据仿真结果结合样机数据对三相分立式永磁机构优化设计。试验结果证明,优化后的永磁机构各项技术参数达到了设计要求。

According to the requirements of three phase permanent magnetic actuator circuit breaker, its supporting permanent magnetic actuator needs to be miniaturization and low voltage, low current, big retentiveness and other special requirements, designing and developing a new permanent magnetic actuator. The main research in this article is that the relationship between the displacement, speed and other mechanical parameters of permanent magnetic actuator dynamic iron core in switching process to the time in low voltage of points, and the determination of parameters optimization such as the coil current and static keep force etc. Based on the finite element method, the analysis of permanent magnet actuator is researched; the permanent magnetic actuator simulation model in Maxwell 2D is established,and according to the simulation results combined with prototype data of three-phase discrete permanent magnetic actuator optimization design is made. Test results show that the various technical parameters of the optimized permanent magnetic actuator meet the design requirements.