FPGA Based Speed Control and Back EMF Extraction from Line Voltages Using IIR Digital Filters for BLDCM

Sensorless control of high‐speed BLDC motor using equal area criterion based precise commutation scheme with Fuzzy based phase delay compensation

“…In proposed work, least Pth-Norm IIR filter has been implemented for back EMF extraction. 38,39,44 During the filtering, it is assured that there should be least phase delay between the precise commutation point (terminal voltage ZCP) and ZCP of filtered back EMF. Discrete transfer function of proposed least Pth-Norm IIR filter the with numerator of first order and denominator of second order can be given as,…”

“…IIR filters can provide similar magnitude response with fewer coefficients. In proposed work, least P th‐Norm IIR filter has been implemented for back EMF extraction 38,39,44 . During the filtering, it is assured that there should be least phase delay between the precise commutation point (terminal voltage ZCP) and ZCP of filtered back EMF.…”