Piezoelectric micromotor using a metal-ceramic composite structure

This paper presents a new piezoelectric micromotor design, in which a uniformly electroded piezoelectric ring bonded to a metal ring is used as the stator. Four inward arms at the inner circumference of the metal ring transfer radial displacements into tangential displacements. The rotor ends in a t...

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Bibliographic Details
Published in:IEEE transactions on ultrasonics, ferroelectrics, and frequency control ferroelectrics, and frequency control, 2000-07, Vol.47 (4), p.836-843
Main Authors: Koc, B., Bouchilloux, P., Uchino, K.
Format: Article
Language:English
Subjects:
Arm
Bonding
Computer programs
Costs
Couplings
Finite element methods
Micromotors
Motors
Piezoelectricity
Shape
Software
Stators
Tips
Torque
Velocity measurement
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Summary:This paper presents a new piezoelectric micromotor design, in which a uniformly electroded piezoelectric ring bonded to a metal ring is used as the stator. Four inward arms at the inner circumference of the metal ring transfer radial displacements into tangential displacements. The rotor ends in a truncated cone shape and touches the tips of the arms. A rotation takes place by exciting coupled modes of the stator element, such as a radial mode and a second bending mode of the arms. The behavior of the free stator was analyzed using the ATILA finite element software. Torque vs. speed relationship was measured from the transient speed change with a motor load. A starting torque of 17 /spl mu/Nm was obtained at 20 Vrms. The main features of this motor are low cost and easy assembly because of a simple structure and small number of components.
ISSN:0885-3010
1525-8955
DOI:10.1109/58.852065