低压断路器操作机构的动态仿真与优化设计  

DYNAMIC SIMULATION AND OPTIMUM DESIGN OF LOW-VOLTAGE CIRICUIT BREAKER

作　　者：张敬菽[1] 陈德桂[1] 刘洪武[1] 

机构地区：[1]西安交通大学电气学院,陕西西安710049

出　　处：《中国电机工程学报》2004年第3期102-107,共6页Proceedings of the CSEE

基　　金：国家教育部博士点科研基金项目(20020698008)

摘　　要：采用基于多体动力学原理的虚拟样机技术,建立了低压塑壳断路器操作机构的动力学模型,并通过试验测试了该型号断路器的机械性能,结果表明所建仿真模型的输出特性与试验结果吻合得较好,证明了模型的正确性。该模型的建立对于研究低压断路器的开断特性具有重要意义,也为进一步的优化设计提供了良好的平台。计及短路情况下电动斥力的影响,分断过程所需时间缩短了约 2ms设计研究的结果表明:上连杆的质心的 y 坐标和质量对动触头角速度影响最大,跳扣的质心位置和质量影响也较大优化后动触头平均角速度提高了 13.3%。A novel dynamic model of low-voltage molded case circuit breaker operating mechanisms was built based on multi-body dynamics adopting virtual prototyping technology. An experiment was done to verify the model. The results showed that the simulation is in good agreement with the test results of the real circuit breaker. It is significant that the model can be used to study the interrupting characteristics of low- voltage circuit breaker and to provide a good basis for circuit breaker optimum design. Considering the electro-dynamic repulsion force effect, the time of the interrupting process was shortened about 2ms. It is indicated that the centroid y coordinates and mass of upper linkage have most influence in angular velocity of moving contact and the centroid position and mass of trip are next to them. After optimization design, the average angular velocity of moving contact is raised 13.3%.

关 键 词：低压断路器 操作机构 动态仿真 脱扣器 优化设计 动力学 虚拟样机 

分 类 号：TM561[电气工程—电器]