摘  要：为提高步进电机细分驱动系统的故障诊断水平，在Simulink下建立了包含两相混合式步进电机本体、细分驱动、功率驱动及电流控制等模块在内的仿真模型。针对H型逆变桥臂四个功率开关管正常运行、短路及开路故障等状况进行了仿真，得到了相应的相电流波形。对各类故障进行了研究，分析了不同故障条件下电流波形的特征，分析结论为步进电机细分驱动系统的故障诊断提供了参考。
关键词：混合式步进电机；细分；故障；仿真

Abstract: A simulation model of the drive system including a two-phase hybrid stepping motor module, a subdividing module, inverter bridges and current controlling modules was constituted based on Simulink to provide referrences to fault diagnosis.The natural operation and the faults including short circuit and open circuit in power transistors of H bridges were simulated and the performance waveforms relevant to different faults were obtained. Results of fault simulation were analyzed theoretically and the referrences to fault diagnosis of stepping motors are provided.
Key words: hybrid stepping motor; subdivision; fault; simulink