Maximum sensitivity based fractional-order controller for permanent magnet synchronous motor system with time delay

Because of nonlinear and strong coupling features, control system of permanent magnet synchronous motor usually requires high robustness, which can be achieved by fractional-order controller with strong ability against disturbances. A tuning approach based on D-decomposition method and maximum sensitivity is proposed to design fractional-order PI λ controller for permanent magnet synchronous motor system with current time-delay feedback. Considering the impact of time delay, robust stabilizing region of system is investigated according to D-decomposition method. And maximum sensitivity is applied to the parameters tuning of controller to improve the robustness of control system. Simulations on permanent magnet synchronous motor system with time delay against disturbances are offered to verify the effectiveness of the proposed method.