Patent ID: 9692335
Date: 2017-06-27
CPC Classifications: B65H,G03G,H02P

Claim:
1. A motor driving apparatus for causing drive current to flow in first and second armature coils of two-phases, wound so as not to be coupled to each other, to rotate a rotator, comprising: a drive unit configured to give a first PWM pulse signal to each of both ends of the first armature coil, and give a second PWM pulse signal to each of both ends of the second armature coil, to cause the drive current to flow in the first and second armature coils, wherein the drive unit includes a first shift unit configured to, when a difference between pulse widths of the first PWM pulse signal given to one end of the first armature coil and of the first PWM pulse signal given to the other end is less than or equal to a first predetermined value, shift forward any one of pulses of the first PWM pulse signals given to the one end and the other end of the first armature coil, and a second shift unit configured to, in a case where the shift by the first shift unit is performed, when a difference between pulse widths of the second PWM pulse signal given to one end of the second armature coil and of the second PWM pulse signal given to the other end is less than or equal to a second predetermined value, shift backward any one of pulses of the second PWM pulse signals given to the one end and the other end of the second armature coil, along with the first shift unit.