Method of damping actuator and actuator
US7332848B2 · kind B2 · utility
3Cited by
4References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2006 |
| Grant date | Feb 19, 2008 |
| Priority date | — |
| Expiry date | Mar 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/043
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An actuator includes a piezoelectric element, and a displacement enlargement mechanism which has a movable portion configured to be displaced as the piezoelectric element is displaced and enlarges an amount of displacement of the piezoelectric element. A restraint member is fixed to the movable portion with an elastic or viscoelastic body therebetween and convert vibrational energy of the movable portion into thermal energy based on deformation of the elastic or viscoelastic body, thereby lowering a resonance peak amplitude of the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.