A motor includes a rotor having a magnet, a stator having two coils, and a controller configured to control excitations of the two coils. The stator includes first and second yokes excited by the coils, and first and second rotor detectors configured to detect a magnetic flux. The first yoke is arranged for each electric angle of 360°, and the second yoke shifts from the first yoke by an electric angle of 90°. The first rotor position detector is arranged at the same position as the first yoke. The controller generates an excitation switching signal for each coil based on detection signals from the first and second rotor position detectors, and excites a corresponding coil, and obtains first and second delay angles.