Double closed-loop control of PMSM based on improved model reference adaptive strategy and sine–cosine algorithm
摘要
Permanent magnet synchronous motor is a high-order nonlinear and uncertain system. Aiming at the problem that its conventional feedback control is vulnerable to various disturbance factors of the system, resulting in insufficient anti-disturbance performance, based on the mathematical model of the permanent magnet synchronous motor and the basic principle of the model reference adaptive algorithm, this paper designs a double closed-loop adaptive controller by using the generalized output error signal of the system combined with the input quantity of the forward path and the output feedback quantity of the controlled object, and utilizes the improved sine–cosine optimization algorithm to optimize the variable parameters in the controller. Finally, an experimental platform is built, and the classic PI control and the traditional model reference adaptive control are selected as the comparison groups. The experimental results verify that the fluctuation generated by the control system when disturbed is smaller, the speed of restoring stability is faster, and the anti-disturbance ability is stronger.