Patent ID: 9018884
Filing Date: 2015-04-28
Classification: B65H,H02P

Abstract:
1. A motor control device comprising: a motor lock state determining unit configured to determine whether a motor is in a lock state in which the motor cannot be rotated based on rotation information of the motor; a position hold state determining unit configured to determine whether the motor is in a position hold state in which the motor is stopped with a rotation position of the motor being held; a lock detection invalidation determining unit configured to invalidate the determination of the lock state of the motor executed by the motor lock state determining unit when it is determined by the position hold state determining unit that the motor is in the position hold state and when a predetermined condition is satisfied; a position error correction unit configured to correct an error of a target stop position of the motor so that the error falls within a predetermined range when the determination of the lock state of the motor is invalidated by the lock detection invalidation determining unit; and a motor control unit configured to perform control to change a rotation direction of the motor in a time shorter than a time in which the motor lock state determining unit determines that the motor is in the lock state when the motor is in the position hold state after the error is corrected.