Title:
METHOD FOR CONTROLLING AND ADJUSTING THE LENGTH OF A PIEZOELECTRIC ACTUATOR (PA) AND AN ELECTRONIC UNIT FOR REGULATING SAID METHOD
Document Type and Number:
WIPO Patent Application WO2004001794
Kind Code:
A3
Abstract:
The invention relates to a method for controlling piezoelectric actuators (PA), in particular piezoelectric multilayer actuators (PMA), which are regularly subjected to a positive voltage during operation to induce elongation. According to the invention, the PMA is subjected to a restricted negative voltage or offset voltage, which does not cause a polarization reversal, for predefined operating modes of the PMA, in order to return the latter to a definable initial position.
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Inventors:
BACHMAIER GEORG (DE)
FISCHER BERNHARD (DE)
GOTTLIEB BERNHARD (DE)
KAPPEL ANDREAS (DE)
MEIXNER HANS (DE)
MOCK RANDOLF (DE)
SCHWEBEL TIM (DE)
FISCHER BERNHARD (DE)
GOTTLIEB BERNHARD (DE)
KAPPEL ANDREAS (DE)
MEIXNER HANS (DE)
MOCK RANDOLF (DE)
SCHWEBEL TIM (DE)
Application Number:
PCT/IB2003/004600
Publication Date:
July 22, 2004
Filing Date:
June 20, 2003
Export Citation:
Assignee:
SIEMENS AG (DE)
BACHMAIER GEORG (DE)
FISCHER BERNHARD (DE)
GOTTLIEB BERNHARD (DE)
KAPPEL ANDREAS (DE)
MEIXNER HANS (DE)
MOCK RANDOLF (DE)
SCHWEBEL TIM (DE)
BACHMAIER GEORG (DE)
FISCHER BERNHARD (DE)
GOTTLIEB BERNHARD (DE)
KAPPEL ANDREAS (DE)
MEIXNER HANS (DE)
MOCK RANDOLF (DE)
SCHWEBEL TIM (DE)
International Classes:
F02D41/20; H01L41/04; (IPC1-7): H01L41/04; F02D41/20
Foreign References:
| DE19905340A1 | 2000-08-10 | |||
| EP0767503A1 | 1997-04-09 | |||
| US6201336B1 | 2001-03-13 | |||
| DE10130857A1 | 2002-03-14 |
Other References:
PATENT ABSTRACTS OF JAPAN vol. 1999, no. 08 30 June 1999 (1999-06-30)
KAIZUKA H ET AL: "A SIMPLE WAY TO REDUCE HYSTERESIS AND CREEP WHEN USING PIEZOELECTRIC ACTUATORS", JAPANESE JOURNAL OF APPLIED PHYSICS, PUBLICATION OFFICE JAPANESE JOURNAL OF APPLIED PHYSICS. TOKYO, JP, vol. 27, no. 5, 1 May 1988 (1988-05-01), pages L773 - L776, XP000024713, ISSN: 0021-4922
KAIZUKA H ET AL: "A SIMPLE WAY TO REDUCE HYSTERESIS AND CREEP WHEN USING PIEZOELECTRIC ACTUATORS", JAPANESE JOURNAL OF APPLIED PHYSICS, PUBLICATION OFFICE JAPANESE JOURNAL OF APPLIED PHYSICS. TOKYO, JP, vol. 27, no. 5, 1 May 1988 (1988-05-01), pages L773 - L776, XP000024713, ISSN: 0021-4922
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