| 摘要 |
PURPOSE:To stabilize the operation of a motor, by a method wherein the driving body of the motor is driven in a frequency, higher than the highest value of the hysteresis loop of a resonance frequency showing a non-linear effect and lower than an antiresonance frequency. CONSTITUTION:An ultrasonic motor consists of a piezo-electric driving body, a slider, an elastic body and a moving body while a traveling wave is excited in the driving body to drive the moving body. Upon driving this motor, the driving body is driven in a frequency, higher than the heighest value of the hysteresis loop of a resonance frequency showing a non-linear effect and lower than the antiresonance frequency of the driving body. According to this method, the moving body may be turned stably at all times without changing the admittance thereof unstably and suddenly. |
