Robust current control system of synchronous reluctance motors using inverse LQ design method

In this paper, the robust current control system of synchronous reluctance motors using ILQ (inverse linear quadratic) design method is proposed. Firstly, in order for nonlinear state feedback to perform simultaneously decouple and large region linearization of the d-q axes system of the synchronous reluctance motors, the linear current-voltage state equation linearized by the d-q axes decouple of the synchronous reluctance motors is derived. Next, according to the ILQ design method, the optimum solution and the optimal condition that achieve the robust current control system of the synchronous reluctance motors are analytically derived, then the robust current control system of the synchronous reluctance motors is designed. Finally, it is compared that the proposed method and the standard PI control method, the practicality and validity of the proposed method are confirmed by experimental results of the current control of synchronous reluctance motors.