Second-order sliding mode speed controller with anti-windup for BLDC motors

Abstract

In this paper, a second-order sliding mode speed controller with Anti-windup for Brushless DC (BLDC) motors is proposed. The speed control is developed on the mathematical model based on the well known (d; q) field oriented frame. The super-twisting algorithm is a second order sliding mode controller that allows the rejection of the chattering phenomena while maintaining the robustness of the control. The anti-windup is a technique to handle with the pure-integrator saturation phenomenon, which may lead to instability and low performance in real-time control implementation. By using a Lyapunov function, the closed-loop stability of the system is demonstrated. The control law is implemented on an Digital Signal Processor (DSP) TMS320F2812. Simulations and experimental results are presented and compared to the same control strategy.