摘要
高压真空灭弧室有较长的运动行程 ,并需要较高的分、合闸速度。在较长的开距下 ,气隙磁阻较大 ,动铁芯往往不易获得能满足高压真空灭弧室要求的机械力 ,这给配用永磁机构带来了相当的难度。根据真空灭弧室及其机械传动系统负载反力的非对称性 ,该文提出在分闸工作气隙区域内设置由导磁材料构成的磁分路。引入磁分路后 ,进入动铁芯磁极端面的磁通被分成工作气隙主磁通和边缘扩散磁通 ,这样动铁芯的电磁吸力特性被有效改善 ,即使在较长的运动行程下也能获得满足 72 .5kV高压真空断路器开断要求的动能。该文对永磁操动机构的静磁场和动态特性进行了分析 ,给出了计算和仿真测试结果。
High voltage vacuum interrupter (HVVI) has longer separation and needs faster opening & closing speed. Because air gap's magnetic resistance is proportional to air gap's length, it is very difficult for the actuator to acquire enough drive force under longer separation. As a result, HVVI has been hardly equipped by permanent magnetic actuator. According to the asymmetry of the reacting force from vacuum interrupter and its mechanical transmission system, this paper presents a method setting magnetism divider around the operating air gap of the opening coil. By which, the magnetic flux through the surface of pole is divided into the central flux and the border flux so as to improve the electromagnetic attraction characteristics and meet the on off need of 72.5?kV high voltage vacuum circuit breaker even under longer separation. The static magnetic field and the dynamic characteristics of permanent magnetic actuator are analyzed, and the calculation results & simulation results are presented.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2001年第12期109-114,共6页
Proceedings of the CSEE
