关键词: 电流反馈解耦控制, 扰动观测器, 精确控制, 动态解耦

Abstract: The current feedback decoupling control of permanent magnet synchronous motor (PMSM) is vulnerable to uncertain disturbances such as parameter changes during operation. In order to improve the decoupling effect and control accuracy of current feedback decoupling control, a current feedback decoupling control strategy with disturbance observer was studied. The strategy regards the voltage errors caused by coupling current and inductance parameter changes between axes as system disturbances, estimates them by disturbance observer, and feeds them back to the voltage input as compensation to weaken the influence of disturbances on the system, so as to achieve accurate control of the current loop. The theoretical analysis and experimental results show that the current feedback decoupling control strategy with disturbance observer improves the dynamic decoupling effect and robustness of the system.

Key words: current feedback decoupling control (CFDC), disturbance observer (DOB), precise control, dynamic decoupling