Patent ID: 6384511
Filing Date: 2002-05-07
Classification: H02N

Abstract:
A device comprising:a vibration wave motor including a rotor and a stator and constituting a drive source that performs a predetermined operation; a speed adjusting circuit which drives said vibration wave motor at a predetermined speed to perform the predetermined operation, said speed adjusting circuit also having a high speed mode for driving said vibration wave motor at a speed higher than the predetermined speed for performing the predetermined operation, the speed in said high speed mode being a speed selected for improving a condition of a frictional interface between the rotor and the stator of said vibrating wave motor; and a high speed driving judging circuit which detects a use or operation state of the device or a rotating state of the vibration wave motor and allows driving of the vibration wave motor in the high speed mode when said high speed driving judging circuit determines that the use or operation state of the device or the rotating state of the vibration wave motor is a predetermined state.