నైరూప్య

Ripple reduction using Butterworth LPF for Sensorless BLDC Motor Drive

P. Deepakumari, Dr. P. Arockia Jansi Rani

This paper describes the analysis and design of a low cost sensorless three phase inverter brushless dc motor drive. The absence of hall sensors give rise to a sensorless control therefore the commutations are obtained by the zero crossing detectors. The proposed system employs Butterworth low pass filters (LPF) to prevent multiple output transitions from noise or ripple in terminal voltages. The performance of the proposed work is compared with that using Chebyshev LPF. The simulation results give the performance of developed sensorless technique.