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Piezoelectric element is the core component of ultrasonic motor utilized to transform electric energy into mechanical energy. And the exciting mode of piezoelectric element has a significant influence on the output characteristics of ultrasonic motor. The vibration characteristics of plate-attached cylindrical rotary-linear ultrasonic motor with driving screw thread pair were analyzed theoretically...
The force factor formula of stator based on bending vibration and piezoelectric plate sandwich was deduced. It indicated that, aiming to the ultrasonic motor whose stator uses the bending vibration mode of free beam, disposing the PZT elements on the great strain which was the wave loop of bending vibration was the optimal method. A forecasting model for the ideal pre-force of cylindrical bending...
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