Improving the performance of PMBLDC motor

Abstract — Permanent magnet brushless DC motors (PMBLDC) are appealing candidates for many high performance applications because of their attractive characteristics in such key categories such as power density, torque to inertia ratio, power efficiency, robustness and reliability. One main problem in the PMBLDC motor is the torque ripple which affects the overall performance of the PMBLDC motor. In the proposed work a fuzzy logic controller has been introduced to minimize the torque ripple in the PMBLDC motor to improve the performance. With error (e(u)) and change in error (ce(u)) as the input parameter to the Fuzzy logic, the output response i.e. gate pulse to the inverter circuit is obtained. The gate pulses of the inverter circuit are controlled by using Fuzzy logic. The performance of the inverter driven PMBLDC motor with PID controller is compared with the circuit driven by fuzzy logic and results are found to be encouraging