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A Polymer-based Piezoelectric Vibration Energy Harvester with a 3D Meshed-Core Structure

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Ultrasonic motors using piezoelectric ceramic multimode vibrators.

T Takano¹, Y Tomikawa, T Ogasawara

¹Dept. of Commun. Eng., Tohoku Inst. of Technol., Miyagi.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1990

Summary

Researchers developed a novel ultrasonic motor utilizing piezoelectric ceramic multimode vibrators. This innovative design enables a thin construction, offering a unique advantage for compact applications.

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Area of Science:

Materials Science
Mechanical Engineering
Acoustics

Background:

Ultrasonic motors offer precise motion control.
Piezoelectric ceramics are key components in ultrasonic actuators.
Multimode vibrators present opportunities for enhanced motor performance.

Purpose of the Study:

To develop a novel ultrasonic motor design.
To utilize degenerate horizontal vibration modes in piezoelectric ceramic plates.
To explore the potential for thin-construction ultrasonic motors.

Main Methods:

Employing circular or annular piezoelectric ceramic plates as multimode vibrators.
Utilizing degenerate horizontal vibration modes (same or different forms).
Implementing two orthogonal nonaxisymmetric vibration modes or a combination of nonaxisymmetric and radial modes.

Main Results:

Successful development of an ultrasonic motor based on the described principles.
Demonstration of motor operation using specific vibration mode combinations.
Experimental characterization of the motor's performance and properties.

Conclusions:

The developed ultrasonic motor leverages piezoelectric ceramic multimode vibrators effectively.
The use of degenerate horizontal vibration modes enables unique motor designs.
The motor exhibits a significant advantage in its thin construction, suitable for space-constrained applications.