同步电动机无源性控制方法

Passivity-Based Control Strategies of Synchronous Motors

利用本质上是非线性反馈控制的无源性控制方法,与非线性状态观测相结合,实现负载转矩时变未知情形下磁链、转速的渐近跟踪,并可有效抑制由转子状态的不确定性引起的跟踪误差.该方法从能量角度分析电动机控制系统,确定不必抵消的"无功力",设计全局定义的控制律,具有形式简单、无奇异点、鲁棒性好等特点.基于dSPACE的实验结果证明了该控制策略的有效性.

The main purpose of this paper is to develop a control algorithm that forces the synchronous motor to track flux and speed trajectories with time-varying load torque. To achieve this, an adaptive passivity-based control（PBC） method was developed. The key point of this method is the identification of terms, known as workless forces, which appear in the dynamic equations of induction motor but do not have any effect on the energy balance equation of the closed loop. PBC combined with state observation scheme not only reserves the advantages of PBC such as nonexistence of singularity, but also represses the flux and speed tracking error caused by rotor state uncurtainty. This leads to a simple control structure and enhances the robustness of the control system. The reasonability and validity is testified by the experimental results based on dSPACE.