永磁同步电机直接转矩反步控制  

Direct Torque Control with Backstepping Approach of Permanent Magnet Synchronous Motor

作　　者：宁博文[1] 程善美[1] 秦忆[1] 

机构地区：[1]华中科技大学自动化学院,武汉430074

出　　处：《微电机》2015年第1期29-32,共4页Micromotors

摘　　要：传统直接转矩控制策略存在转矩脉动大、开关频率不固定的问题。基于永磁同步电机数学模型提出了一种新颖的永磁同步电机直接转矩非线性反步控制方法。从转速方程出发,逐步递推设计合适的转矩和磁链控制器,用以代替传统的滞环控制器方法。通过Lyapunov稳定性理论证明了所设计系统的稳定性。仿真结果表明,与传统直接转矩控制相比,所采用的方法能明显减小转矩和电流的波动,并且速度跟踪响应迅速,具有良好的静态和动态特性。There are some problems such as high torque ripples and variable switching frequency existing in traditional direct torque control （DTC）. Direct torque backstepping control approach of permanent magnet synchronous motor is proposed based on the permanent magnet synchronous motor mathematical model. According to the speed equation, proper torque and flux controllers were recursively designed by the novel nonlinear backstepping approach, instead of the conventional hysteresis controller method. Lyapunov stability theorem is employed to provide the stability analysis of the system. The simulation results show that the proposed method can obviously reduce the torque and current tipple, can provide better speed tracking performance compared with the traditional DTC, so that the system has satisfactory dynamic and static performance.

关 键 词：永磁同步电机 转矩和磁链控制 反步控制 LYAPUNOV稳定性 

分 类 号：TM351[电气工程—电机] TM341