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Piezoelectric micromotor using a metal-ceramic composite structure.

B Koc¹, P Bouchilloux, K Uchino

¹Materials Research Laboratory, Pennsylvania State University, University Park, PA, USA. bxk142@psu.edu

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|February 2, 2008

Summary

A novel piezoelectric micromotor utilizes a simple ring design for low-cost, easy assembly. This innovative motor achieves a starting torque of 17 microNm at 20 Vrms, demonstrating potential for micro-scale applications.

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Area of Science:

Mechanical Engineering
Materials Science
Electrical Engineering

Background:

Piezoelectric motors offer precise motion control.
Miniaturization of actuators is crucial for micro-devices.
Existing designs can be complex and costly.

Purpose of the Study:

To introduce a new, cost-effective piezoelectric micromotor design.
To analyze the motor's operational principles and performance.
To highlight the advantages of its simple structure.

Main Methods:

Finite element analysis (ATILA software) to model stator behavior.
Experimental measurement of torque-speed characteristics.
Excitation of coupled radial and bending modes in the piezoelectric stator.

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Main Results:

A functional piezoelectric micromotor was designed and analyzed.
Starting torque of 17 microNm achieved at 20 Vrms.
Demonstrated effective conversion of radial to tangential displacement.

Conclusions:

The proposed piezoelectric micromotor design is simple and cost-effective.
The design facilitates easy assembly due to minimal components.
This micromotor shows promise for various micro-scale applications requiring precise actuation.