永磁同步电机驱动系统的反步与无源协调控制

摘要

针对永磁同步电机(PMSM)驱动系统中,只利用信号控制器或能量控制器难以兼顾良好的动态特性与较低的能量损耗,提出了基于信号与能量的协调控制策略.首先,利用反步法设计信号控制器,以加快系统的动态响应.然后,从能量的角度出发,利用无源控制中的Euler-Lagrange (EL)模型设计能量控制器,以降低系统稳态运行时的能量损耗.进一步设计协调函数,将信号控制器与能量控制器进行协调,从而构成协调控制器.另外,当负载转矩未知时,设计了负载转矩观测器用来估计负载转矩.在MATLAB/Simulink平台上对所设计的协调控制系统进行了仿真,仿真结果表明,所提出的协调控制策略能够充分结合信号控制器和能量控制器的优点,获得良好的动态和稳态性能,减小PMSM损耗.%In the permanent magnet synchronous motor (PMSM) drive system,it was difficult to achieve good dynamic performance and low energy consumption only by the signal controller or the energy controller.Therefore,presented a coordinated control strategy based on signal and energy.In order to speed up the dynamic response of PMSM,the signal controller was designed based on backstepping method.From the point of view of energy,the energy controller was designed by using the Euler-Lagrange (EL) model of passive control in order to reduce the energy loss of PMSM.At last,the coordination function was used to combine the above methods together.In addition,the methods of load torque estimation and controller design were developed when the load torque was unknown.Simulation was implemented by using MATLAB/Simulink,and its results showed that the coordinated control strategy could fully combine the advantages of the signal controller and the energy controller to improve the dynamic and steady state performance,minimize the energy loss of the system.