Implementation of FOC based speed control for an E-Rickshaw brushless DC drive

Abstract

This paper describes an approach to implement Field Oriented Control (FOC) using PID Controller for a brushless direct control (BLDC) motor. The research proposes reduction in total harmonic distortion of the supply current using space vector pulse width modulation technique. Minimization of total harmonic distortion becomes mandatory for a smooth operation in electric vehicle applications. As the harmonics are generated in the supply current, caused by non-linear load in E-Rickshaw. The lower, the value of total harmonic distortion givers better performance of the motor when operated under light load. Here the different strategies employed for controlling BLDC motor speed is analyzed and compared. It also proved that the space vector pulse width modulation technique improves the reliability due to the balanced switching frequency achieved from the solid-state switches in the inverter. Through simulating, the proposed control strategy is analyzed and compared with the existing techniques results in smooth change in current during sudden loading, which improves system performance and as a result the torque ripple gets minimized. The comparative study was made in the Matlab/Simulink 2019b, by designing the mathematical model of motor, inverter and the switching sequence, and the max-min algorithm for the SVPWM.