永磁同步电机驱动系统开路故障诊断及容错控制  

Open-Circuit Diagnosis and Fault-Tolerant Control of Permanent Magnet Synchronous Motor

作　　者：高岩[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《电机与控制应用》2014年第1期37-41,共5页Electric machines & control application

摘　　要：开关功率器件长时间运行的不稳定性及定子绕组开路故障限制了永磁同步电机(PMSM)在高可靠性驱动领域的应用,容错控制系统的设计是提高系统可靠性和安全性的一个很重要途径。提出了一种开路故障的诊断方法及具有容错功能的驱动控制系统。电流矢量轨迹斜率这种诊断方法易出现振荡问题,为了解决其不足,首先对三相电流进行基波提取。其容错方案是在三相逆变器的基础上,增加一对桥臂,使之在故障发生后与星型连接的永磁同步电动机中性点抽出线相连,电机内部此刻仍能形成近圆形旋转磁场,使电机输出稳定转矩。建立相应的驱动控制系统仿真模型,通过仿真,结果表明该方案可靠可行。Permanent magnet synchronous motor （PMSM） is restricted in the high-reliability applications due to instable running for a long time of the switching power devices and the open-circuit fault of the stator winding circuit. The design of fault-tolerant control system is an important way to improve the reliability and safety. An open-circuit fault diagnosis method am｜ driving control system with fauh-tolerant control strategy were proposed. Firstly the three- phase fundamental wave current was extracted to solve the problem of getting oscillation in the diagnostic method of current vector trajectory slope. Based on three-phase inverter, the fault-tolerant solution was adding a pair of bridge arms to join the neutral point extraction line of PMSM in star join after the failure occurred, approximate circular rotating magnetic field forming, and stable torque obtained. The simulation model of driving control system was established. The simulation results showed the solution was reliable and feasible.

关 键 词：永磁同步电机 矢量控制 故障诊断 基波提取 容错控制 

分 类 号：TM351[电气工程—电机]