Method of charging and discharging a piezoelectric element
US6784596B2 · kind B2 · utility
5Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 8, 2002 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Feb 22, 2023 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02M2200/703
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A method of charging or discharging a piezoelectric element, in which electric charge carriers are transported back and forth between a supply voltage of a direct voltage source and a piezoelectric element in order to transmit an elastic deflection of the piezoelectric element to an actuator. An actuating movement of the actuator is modified as a function of the level of a voltage being applied to the piezoelectric element, a reduction of the level of the applied voltage being compensated for by at least one additional transmission of electric charge carriers during a holding phase of the piezoelectric element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.