并联双线圈式直流接触器电磁机构合闸动作特性研究

直流接触器是新能源系统以及电动汽车中配置最为广泛的开关电器之一。而直流接触器的动态特性是衡量直流接触器性能的重要指标之一。本文以并联双线圈式直流接触器为研究对象，建立了直流接触器电磁机构的动力学模型，利用基于Adams与Maxwell的联合仿真研究方法对直流接触器的电磁机构进行合闸过程的仿真分析，研究结果表明，机构合闸动作的仿真合闸时间与试验合闸时间相吻合，验证了该仿真方法的正确性；同时研究了弹簧参数和线圈参数等因素对机构合闸运动特性的影响，研究发现在一定范围内弹簧预压力变化对合闸时间影响不大，线圈安匝数增大会导致合闸时间变小，线圈内阻增大会导致合闸时间变大且动触头弹跳更剧烈。本文的仿真方法与结果能为直流接触器电磁机构的改进设计与优化提供一定参考。

Research on closing action characteristics of the electromagnetic mechanism of the parallel double coil DC contactor

DC contactor is one of the most widely configured switching appliances in new energy systems and electric vehi-cles. The dynamic characteristic of DC contactor is one of the important indexes to measure the performance of DC contactor. In this paper, a dynamic model of the electromagnetic mechanism of DC contactor with parallel double coil type is established, and the closing process of the electromagnetic mechanism of DC contactor is simulated and analyzed by using the co-simulation research method based on Adams and Maxwell. The research results show that the simulation closing time of the closing action of the mechanism is consistent with the test closing time. The correctness of the simulation method is verified. At the same time, the influence of spring pa-rameters, coil parameters and other factors on the closing motion characteristics of the mechanism is studied. It is found that the change of spring pre-pressure has little influence on the closing time within a certain range. The increase of coil ampere-turns will lead to the closing time becomes smaller, and the increase of coil internal re-sistance will lead to the closing time becomes larger and the moving contact bounces more drastic. The simula-tion method and results in this paper can provide some reference for the improvement design and optimization of DC contactor electromagnetic mechanism.