针对单独采用传统意义上的信号控制策略和能量控制方法都难以满足对永磁同步电机的高性能控制要求,本文提出了将信号控制策略和能量控制策略相结合的控制方法。采用滑模控制思想,并结合反步法对信号控制器进行了设计,而能量控制器则根据端口受控哈密顿系统,利用最小损耗原理进行设计,同时利用指数函数将信号控制器与能量控制器协调起来,考虑当负载转矩未知时,引入负载转矩观测器,并利用Matlab/Simulink对所设计的协调控制系统进行仿真分析。仿真结果表明,所提出的协调控制策略不仅可以实现快速的转速响应,而且可以显著降低能量损耗。该研究为永磁同步电机的优化控制提供了新的解决方案。
It is difficult to meet the requirement of high performance control of permanent magnet synchronous motor(PMSM)by the traditional signal control strategy and energy control method.In order to solve this problem,this paper proposes a control method which combines the signal control strategy and energy control strategy.Based on the backstepping method,the signal controller is designed by sliding mode.The energy controller is given by making use of Port-Controlled Hamiltonian system on the basis of the minimum loss principle.Then select the exponential function as the coordination function to combine them together.Considering the load torque is usually unknown,the load torque observer is introduced.Simulation is implemented by using Matlab/Simulink,and its results show that the coordinated control strategy can not only achieve a fast speed response,but also reduce the energy loss greatly.This study provides a new solution for the optimal control of permanent magnet synchronous motor.