Feedback linearization control approach for Brushless Doubly-Fed Machine

This paper presents a novel decoupling control strategy, corresponding to the vector control of induction motors, for the Brushless Doubly-Fed Machine (BDFM). The affine nonlinear state equation of the BDFM within an arbitrary rotating reference frame is also given for the first time. To achieve decoupling control over torque and flux, an input-output feedback linearization control strategy is used. A new control arithmetic, realized in the synchronous reference frame oriented by the control motor rotor flux, is developed. The necessary condition for implementation of the proposed control strategy is demonstrated. Simulation results confirm the feasibility and superb performance of the proposed strategy.