Apparatus for driving three-phase half-wave drive brushless motor

A n apparatus for driving a three-phase half-wave drive brushless motor comprising a rotor and three phase stator windings having a terminal connected to a power supply voltage terminal, by changing a current supplied to each of the phase stator windings, the apparatus comprising:

• an output circuit for supplying the current to each of the phase stator windings selectively;
• a back electromagnetic force detector for detecting a back electromagnetic force induced in one to which the current is not supplied of the phase stator windings, and outputting a detection signal;
• a control logic for controlling the output circuit on the basis of the detection signal outputted from the back electromagnetic force detector;
• and
• a stop position detector for comparing widths of kickback voltages generated in the phase stator windings with each other, after the current is supplied to each of the phase stator windings for a predetermined time while the rotor does not react and tuned off, and detecting a stop position of the rotor;
• wherein the control logic controls the output circuit so as to supply the current to any one of the phase stator windings on the basis of the stop position of the rotor detected by the stop position detector, to drive the three-phase half-wave drive brushless motor.