Improved Design for Reduction of Torque Ripple of Brushless DC Motor

The paper has probed into the torque ripple of brushless DC motor fed by square wave. For the main torque ripple caused by electromagnetic factor, the equation of two-phase brushless DC motor has been deduced. Then considering the manufactured technique of the motor, an improved design for reduction the torque ripple has been presented with simplified and feasible proposition. And a case has been simulated by dynamic finite element method. The simulation results indicate that the improved design effectively reduces the torque ripple of the motor.