Study On Torque Ripple Minimization Strategy For The Direct Torque Control Of BDFM & Induction Motor

Direct torque control (short for DTC), is a high-efficiency control technology in the variable frequency adjustable speed field of ac motor drives. However, the torque pulsation becomes an important issue in direct torque control technology. In recent years, many scholarsat home and abroad apply themselies to reduce the torque pulsation in direct torque control technology. This control technology is famous for its preeminent performance and robustness. Brushless doubly-fed machine (short for BDFM) is a new kind of special machine in the electrical drive field. The different operating mode of BDFM can be modified by adjusting the frequency, amplitude value of the voltage in the stator control winding. Compared with induction motor, the BDFM can reduce the rating of the inverter; compared with double fed induction machine, the BDFM can enhance the system reliability and leave out the slip ring and the brush. Because of these advantages of BDFM, this machine is...