Drive mechanism employing electromechanical transducer and drive method therefor
US6803699B2 · kind B2 · utility
13Cited by
6References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 19, 2002 |
| Grant date | Oct 12, 2004 |
| Priority date | — |
| Expiry date | Nov 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator using a piezoelectric element and an operating method thereof. The actuator includes: the piezoelectric element; a drive rod fixed to the piezoelectric element; a moving unit engaging with the drive rod by a frictional force; and a driver for applying a voltage to the piezoelectric element. The voltage repeats a cycle of a first value which is one of a maximum value and a minimum value, a second value which is intermediate between the maximum value and the minimum value, and a third value which is the other of the maximum value and the minimum value so as to drive the driving unit with respect to the drive rod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.