Drive circuit of a head drum motor in which an impulse generating magnet is magnetized and control method thereof

摘要

The present invention relates to a head drum motor driving circuit in which an impulse generating magnet is magnetized and a control method thereof. When a mode setting signal is set in a Vsial head drum motor, the magnet coil of each phase is tested A magnetic signal of a binary form generated in accordance with the action of the impulse magnet magnetized on the FEP magnet of the rotor and the magnet coil of each applied phase is detected and the magnetic signal of the first The impulse signal detecting step of detecting the switching position, and a step of comparing and judging the binary waveform impulse signal detected from the hall sensor provided only a single number of impulse signals and the detected waveform signal to determine the phase of the current rotor, A driving sequence determination step of determining a next driving sequence based on the detected signal, A motor rotation speed calculating step of comparing the cycle of the pulse signal and outputting a rotation speed control signal of the head drum motor; a step of driving the corresponding magnet coil in accordance with the next driving sequence determined after the driving sequential determination step, And a driving sequential and rotational speed control execution step of controlling the rotational speed of the head drum motor at a constant speed in accordance with the rotational speed control signal, thereby significantly reducing the manufacturing cost of the driving circuit.