Torque Ripple Suppression of Brushless DC Motor Based on Shoot-through Boost Inverter

To solve the torque ripple problem in brushless DC motor with wide speed range, a topology structure and control strategy based on shoot-through booster inverter are proposed. During normal conduction, torque pulsation is reduced by keeping the non-commutating current constant. When the motor speed is low, the smooth commutation of the motor can be achieved by adjusting the duty cycle. At high motor speeds, the bus voltage required for commutation is greater than the DC supply voltage, and the proposed topology is used to increase the bus voltage required for smooth commutation. Ultimately, the MATLAB simulation confirms the feasibility and effectiveness of the control strategy.