关键词: 永磁同步电机, 电流耦合, 惯量扰动, 交叉耦合电势, 双口结构, 三自由度, 解耦, 参数自校正

Abstract: In some high performance driving occasions, the existence of current coupling, saturation of control quantity and inertia disturbance are the important reasons for the deterioration of the control performance of the servo system. To better the plight, the current loop and speed loop of the permanent magnet synchronous motor vector control system were respectively designed. In the current loop, a two-port three-degree-of-freedom(DOF) internal model control structure was proposed, on the one hand, the stator current crosslink potential enabled complete decoupling; on the other hand, by properly designing a two-port controller, enabled the system to have superior servo follow, disturbance suppression and anti-windup capabilities. The speed loop adopted parameter self-correcting PI controller, the design goal was to solve the system overshoot and steady-state jetter caused by the change of the motor and its load rotational inertia in engineering practice. The simulation results show that the dual-port 3-DOF internal model adaptive controller can realize stable operation, and the system have more superior control characteristics.

Key words: permanent magnet synchronous motor(PMSM), current coupling, inertia disturbance, cross-coupling potential, two-port structure, three degrees of freedom(3-DOF), decouple, parameter self-correction