TORQUE RIPPLE ANALYSIS OF SPEED CONTROL TECHNIQUES OF BLDC MOTOR FOR EV APPLICATIONS
Amit B. Jadhav1, Dr. Mahadev S. Patil2
1Department of Electrical Engineering, D. Y. Patil Education Society (Deemed to be University), School of Engineering & Management, Kolhapur, Maharashtra-416006, India and Research Scholar, Shivaji University, Kolhapur Maharashtra-416006, India
2Department of Electronics & Telecommunication Engineering, Kasegaon Education Society’s Rajarambapu Institute of Technology, Affiliated to Shivaji University, Sakharale, Maharashtra-415414, India
Abstract: In BLDC motor operation torque ripples affects performance, efficiency and application suitability. The torque ripples are cyclical variations in output torque during motor rotation, creating undesirable consequences including increased noise, vibrations, reduced efficiency and compromised precision in positioning applications. Torque ripples are characterized as the variance of output torque as the motor rotates, representing a deviation from the idealized constant torque output. Torque ripples are caused due to non-ideal current waveform due to commutation action are undesirable for smooth motor operation and will cause oscillations in the speed of the motor. These oscillations increase the noise and vibrations of the mechanical parts of the motor thus reducing the lifespan of the motor. The torque ripples fundamentally impact the motor’s ability to deliver smooth, consistent power transmission. In this paper, torque ripple analysis of BLDC motor is presented using MATLAB simulations with FOC control, SMC control and PWM control techniques. The current ripple minimization is the primarily focused which also reduces the torque ripples in the BLDC motor for wide range of operating speed. The FOC control outperforms for reducing torque ripples with 10% ripples in motor output torque.
Keywords: BLDC motor, speed control, torque ripples, FOC, PWM
VOLUME 9 ISSUE 12 2025: 118 – 138