Driving device for piezoelectric element
US4749897A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 11, 1987 |
| Grant date | Jun 7, 1988 |
| Priority date | — |
| Expiry date | Mar 11, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2058
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A driving device for a piezoelectric element for electrically driving a piezoelectric element to obtain a predetermined mechanical displacement, the piezoelectric element driving device being provided with a transformer having a primary winding and a secondary winding, the secondary winding being connected to the piezoelectric element; a switching element connected to the primary winding and controlling the amount of energy stored in an air-gap of the core of the transformer; and an energy control means for driving the switching element so that the amount of energy stored in the air-gap of the core of the transformer becomes a set value, the displacement of the piezoelectric element being controlled by the amount of energy stored in the air-gap of the core of the transformer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.