真空断路器新型电机操动机构的多体动力学仿真

为提高断路器的可靠性,研究了一种新型的电机机构,该电机机构具有结构简单、体积小、响应快且运动过程可控等优点,研究重点为在电机机构操作下真空断路器的分/合闸机械特性。结合40.5 kV配电机机构的真空断路器,采用多体动力学仿真软件(automatic dynamic analysis ofmechanical systems,ADAMS)建立真空断路器新型电机机构的虚拟样机模型,对断路器的分/合闸过程进行仿真分析。由动态仿真得到电机转角与动触头行程的对应关系、断路器动触头的行程及速度特性曲线等,同时对断路器进行分/合闸操作实验,通过安装在转轴上的扭矩传感器及绝缘拉杆处位移传感器测得相应的运动特性,并将仿真结果与实验结果进行对比分析,仿真模型的输出特性与实验结果吻合较好,表明虚拟样机模型是有效的。

Multi-Body Dynamics Simulation and Analysis on Novel Motor-Operating Mechanism for Vacuum Circuit Breakers

To improve the reliability of circuit breakers,a new motor-operating mechanism,which possesses such advantages as simple structure,small size,fast response and controllable moving process,is developed.The focal point of the research is concentrated to the switching on/off characteristics of vacuum circuit breaker with motor-operating mechanism.Taking a 40.5kV vacuum circuit breaker with motor operating mechanism as research object and using automatic dynamic analysis of mechanical systems(ADAMS),a virtral prototype model of vacuum circuit breaker with a new type of motor-operating mechanism is built to simulate the switching on/off processes of the circuit breaker.From simulation results corresponding relation between the rotated angle of the motor and the stroke of the contact of circuit breaker as well as the characteristics of contact stroke and speed vs time during the switching on/off process are obtained.Meanwhile,the experiments of switching on/off of the vacuum circuit breaker are made and the corresponding moving characteristics are measured by the torque sensor installed on the rotating shaft and the displacement sensor installed on insulating tension pole.Contrastive analysis on results from experiments and simulation shows that the output characteristics of the simulation model can well conform to experiment results,thus it also states clearly that the virtual prototype model is effective.