A Piezoelectric-Metal-Cavity (PMC) actuator

Kwok Ho Lam; C. L. Sun; H. L W Chan; X. Z. Zhao; C. L. Choy

doi:10.1007/s10832-007-9067-9

A Piezoelectric-Metal-Cavity (PMC) actuator

Kwok Ho Lam, C. L. Sun, H. L W Chan, X. Z. Zhao, C. L. Choy

The Hong Kong Polytechnic University

Research output: Journal article publication › Journal article › Academic research › peer-review

4 Citations (Scopus)

Abstract

A novel piezoelectric-metal-cavity (PMC) actuator has been designed to exhibit a large flexural displacement. This PMC actuator consists of a metal ring sandwiched between two identical piezoelectric unimorphs. The radial contraction of the piezoelectric ceramic is converted into flextensional motion of the unimorph, causing a large flexural displacement in the centre part of the actuator. The metal cavity acts a function of circumferential coupling of the piezoelectric unimorphs. It was found that the effective piezoelectric charge coefficient of the PMC actuator can approach 40,000 pC/N. With its high piezoelectric and electromechanical coupling coefficients, the PMC actuator gives a static displacement 16 μm can be produced under a d.c. driving voltage of ±77 V.

Original language	English
Pages (from-to)	251-253
Number of pages	3
Journal	Journal of Electroceramics
Volume	18
Issue number	3-4
DOIs	https://doi.org/10.1007/s10832-007-9067-9
Publication status	Published - 1 Aug 2007

Keywords

Actuator
Piezoelectric
Unimorph

ASJC Scopus subject areas

Ceramics and Composites

More information

10.1007/s10832-007-9067-9

Cite this

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A Piezoelectric-Metal-Cavity (PMC) actuator

Abstract

Keywords

ASJC Scopus subject areas

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