Direct Torque Control of Brushless DC Motor using State-Feedback Linearization Techniques

Abstract

In order to get fast torque response and good robustness to the parametric uncertainties and disturbance of Brushless DC (BLDC) motor drives, the method under direct torque control (DTC) with state-feedback linearization techniques is investigated. With the input of the error between the reference torque and the estimated torque, the torque is directly controlled by the designed controller of state-feedback linearization. To regulate the dynamics of the drive system, the method of pole assignment is used to achieve equivalent control to obtain input-output dynamic performance. With the proposed method, the controller has the advantages of good transient performance and robustness by compared to the traditional DTC method. Simulation results demonstrate the feasibility and the effectiveness of the proposed control method.