Abstrato

Digital Control Strategy for Speed Reversal of BLDC Motor with Load Variant

K. Dinesh, B. Jayabal, M.Kishore

The speed and position estimation from Back EMF has been a problem under speed reversal with load variant response due to change of sign of speed. In this paper, an algorithm using fuzzy logic is proposed to estimate the speed and position of BLDC motor to improve the performance of conventional drives.The estimation of speed and position from Hall Effect sensor is suitable for high performance.It is difficult to mount encoders directly to the shafts of these motors, and for precision position control, a sensorless configuration may be inappropriate. The proposed algorithm gives robust control for the speed reversal with respect to reference speed by continuously calculates position of the rotor at transients as well as steady state. The robustness of the proposed algorithm is proved through the MATLAB simulation.