Techniques for Torque Ripple Reduction in BLDC Motor for EV

Brushless DC Motor has wide-ranging applications in industries with high efficiency, low cost, high torque to mass ratio etc. Especially in Electric Vehicles (EV) it has gained its popularity where it mostly uses BLDC hub motor. But BLDC motor has got some drawbacks, especially during dynamic load conditions it experiences a slight vibration due to torque ripple. Torque ripple can be caused because of commutation torque ripple, mechanical defects, current ripples, imperfect EMF waveform, cogging torque ripple etc. This literally affects the smooth driving experience. This paper relies on the ways to mitigate the torque ripple which is the main incitement for less lifespan of BLDC motor than Induction Motor. It also focus on the mathematical modelling of Brushless DC motor and control techniques for torque ripple reduction. The advantage of this work is it uses simple and efficient technique to reduce the torque ripple.