Actuator using electromechanical transducer and drive pulse generator suitable thereof
US6218764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1998 |
| Grant date | Apr 17, 2001 |
| Priority date | — |
| Expiry date | Sep 9, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/101
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator using an electromechanical transducer capable of driving efficiently and at high speed and a drive pulse generating apparatus, in which the frequency f of a drive pulse is set in a range satisfying equation (1) and the wavelength T is set in a range satisfying equations (2), (3) and (4); EQU (1/3)fr<f<(2/3)fr (1) EQU 0.4<(T1/T)<0.8 (2) EQU 0.35<(T2/T1)<0.95 (3) EQU 0<(T3/T2)<0.3 (4) where fr: resonance frequency of an oscillating member including the electromechanical transducer, T1: drive pulse width, T2: width of a gradually changing portion of drive pulse voltage, T3: width of a rapidly changing portion of drive pulse voltage and where 0.1<(T3/T2)<0.3 may be satisfied.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.