Drive mechanism and drive method employing circuit for generating saw-tooth waveform voltage
US6815871B2 · kind B2 · utility
5Cited by
16References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2002 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Mar 14, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator using a piezoelectric element. The actuator includes: the piezoelectric element, which is capacitive; an inductor; and a resistor. The piezoelectric element, the inductor and the resistor are serially arranged so as to define a serial circuit. When a suitable voltage is supplied to the serial circuit, a saw-tooth waveform voltage is applied to the piezoelectric element so that the piezoelectric element extends at a speed and compresses at a different speed repeatedly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.