中文摘要：

针对电磁选针器的机械结构，建立其瞬态场仿真模型，通过Ansoft Maxwell3D瞬态仿真，分析线圈瞬态电流特性和选针刀头摆动规律之间的关系，并与实验结果进行对比验证。在验证仿真模型的基础上，探究了驱动电压、线圈匝数、永磁体材料和铁芯尺寸等主要参数对其选针性能的影响，结果表明：通过增大驱动电压或采用磁性较强的永磁体可提高响应速度与转动力矩；通过增大线圈匝数或面积一定时采用较窄的铁芯也可增大转动力矩，但会降低响应速度。

英文摘要：

According to the mechanical structure of the electromagnetic needle selector, the simulation model of the transient field is established, the relationship between the transient current characteristics of the coil and the swinging rule of the needle selecting blade is analyzed through transient simulation with Ansoft Maxwell 3D. Comparative validation is carried out with the experimental result. On the basis of the validation of the simulation model, the effects of main parameters （the drive voltage, coil turns, permanent magnet material and iron core size） on the performance of needle selection are explored. Results show that the response speed and the rotation torque can be improved by increasing the drive voltage or using the permanent magnet with strong magnetism; the rotation torque can be increased by increasing the number of turns of the coil or adopting narrow iron core when the area is certain, but the response speed will be reduced.