Patent ID: 7764033

Claim:
A motor driving apparatus comprising: a rotatable rotor which includes a magnet magnetized to n poles in a multipolar manner in a circumferential direction; a first coil; a second coil; a first magnetic pole detecting unit including a first magnetically sensitive pole that senses a magnetic field change occurring as the magnet rotates; a second magnetic pole detecting unit configured to have a second sensing pole that senses a magnetic field change occurring as the magnet rotates; and a control unit configured to switch a direction of electricity flowing through the first coil according to a first corrected signal calculated using a first arithmetic equation including a first detected signal detected by the first magnetic pole detecting unit and a second detected signal detected by the second magnetic pole detecting unit, and to switch a direction of electricity flowing through the second coil according to a second corrected signal calculated using a second arithmetic equation, different from the first arithmetic equation, including the first detected signal detected by the first magnetic pole detecting unit and the second detected signal detected by the second magnetic pole detecting unit.