BLDC MOTOR DRIVING CIRCUIT OF CONTROLLING A DC OFFSET OF A HOLE DEVICE AND A BLDC MOTOR HAVING THE SAME

摘要

Purpose: a BLDC motor drive circuits of an Attenuation-corrected algorithm of one hall device of control accurately set into the constant speed of one motor of control, the offset of the constraint of the output signal by removing a hall device. Construction: a hall device (61) exports first and second signal has opposite in phase each other. First signal of the first low-pass filter (62) input hall device (61) simultaneously passes through low frequencies. The second signal of second low-pass filter (63) input hall device (61) simultaneously passes through low frequencies. Provide an operational amplifier (64). Non- batch of phase terminal of operational amplifier (64) is connected to the output end of the first low-pass filter (62). What the inverting terminal of operational amplifier (64) was connected to the second low-pass filter (63) outputs and inputs terminal.