Real-Time Simulation for Torque Ripple Minimization of BLDC motor using Low Pass Compensator

Nowadays real-time (RT) simulators plays a crucial role in power electronics and motor drives. These simulators give freedom to design complex topologies and test them before prototyping on actual hardware. RT-LAB is a powerful real-time simulation platform that supports faster dynamical systems. This paper presents the real-time simulation of a BLDC motor drive to reduce the commutation torque ripple. The modified PWM method utilizes a modern PWM technique accompanied by a low pass compensator in the current sensor to avoid saturation of the PI controller and eliminates reverse DC link current. Due to which controllability of the PI controller is achieved in the commutation period and ripples are minimized. The study is carried out on BLDC motor and effectiveness of the proposed control method is verified using OPAL-RT based real-time simulator.