MOTOR DRIVING DEVICE, DISK REPRODUCING DEVICE, AND MOTOR CONTROL METHOD

PROBLEM TO BE SOLVED: To improve the driving capability without changing the design of driving parts.SOLUTION: A disk conveyance motor driving part 1031 and a spindle motor driving part 1032 are connected to a disk conveyance motor 101a and a spindle motor 101b by circuits C1 and C2. The circuits C1 and C2 are connected by control lines p1 and p2. A switch 102a is disposed in the circuit C1 and a switch 102b is disposed in the circuit C2. A disk conveyance control part 1041 and the disk conveyance motor driving part 1031 are connected by wiring C3, a spindle control part 1042 and the spindle motor driving part 1032 are connected by wiring C4, and the wiring C3 and the wiring C4 are connected by a control line p3. Only the switch 102a or the switch 102b, which is connected to the motor to be driven, is turned on. The disk conveyance motor driving part 1031 and the spindle motor driving part 1032 cooperatively drive the disk conveyance motor 101a and the spindle motor 101b.