计及电动斥力效应的低压塑壳断路器机构动力学仿真

采用基于多体动力学原理的软件包ADAMS，建立了低压塑壳断路器操作机构的动力学模型，并通过实验测试了该型号断路器的机械性能．结果表明，所建模型的输出特性与实验结果吻合很好，证明了仿真模型的正确性．该模型的建立对于研究断路器的瞬态特性具有重要意义，为研究电动斥力对断路器机械特性的影响及机构的优化设计提供了良好的平台．利用霍尔姆公式和三维有限元分析软件ANSYS，计算短路开断过程的电动斥力，分析了短路情况下电动斥力对低压断路器开断过程的影响，实现了机电耦合．由于电动斥力的作用，机构短路情况下的动作时间比手动脱扣缩短了约2ms．

Dynamic Simulation of Operating Mechanism in Low-Voltage Molded Case Circuit Breaker Considering Electrodynamic Force

A novel dynamic model of the operating mechanisms of low-voltage molded case circuit breaker is set up by adopting automatic dynamic analysis of mechanical system(ADAMS), a software package based on the theory of multi-body dynamics. The model is confirmed by experiments on the mechanical performance of the tested circuit breakers, which also paves the way to the further study on the impact of the electrodynamic repulsion force on the circuit breaker and the optimization of the mechanical design. To analyze the influence of the electrodynamic force on the breaking process of the circuit breaker under the condition of the anticipated 10 kA peak current, the electrodynamic force is calculated with the Holm formula and 3-D finite element analysis software ANSYS, consequently the electromechanical coupling equations were solved. The operating time is shortened about 2 ms by taking the electrodynamic repulsion force into account.