Patent · US Active

Method for tuning a resonant frequency of a piezoelectric component

US8324784B2 · kind B2 · utility

2Cited by

7References

11Claims

0Family size

Assignee

EPCOS AG · DE

Inventors

Guenter Engel · Leibnitz, AT
Michael Huainig · Graz, AT
Markus Puff · Graz, AT
Thomas Wippel · Stainz, AT

Key dates

Filing date	Dec 16, 2010
Grant date	Dec 4, 2012
Priority date	—
Expiry date	Dec 16, 2030

Classification

Technology area (CPC H)Electricity
CPC primaryH03H2009/02196
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A method for tuning a resonant frequency of a piezoelectric component is disclosed. The piezoelectric component includes a transducer extending in three spatial directions. The resonant frequency depends on an extension in at least one of the spatial directions and/or on a material-dependent elasticity modulus. The transducer includes a layered structure with at least two first electrodes and at least one second electrode, which is disposed between the two first electrodes. In the method, a DC voltage is applied to at least one of the at least two first electrodes and the at least one second electrode, so that a change of the resonant frequency results due to a change to the extension in the one spatial direction and the elasticity modulus. A control voltage with an excitation frequency is applied, the excitation frequency substantially corresponding to the modified resonant frequency. This generates a vibration of the piezoelectric component.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.