Inertial piezoelectric actuator driven by symmetrical sawtooth wave and method for achieving bi-directional motion thereof
US11075593B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2020 |
| Grant date | Jul 27, 2021 |
| Priority date | — |
| Expiry date | Nov 12, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/06
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An inertial piezoelectric actuator driven by symmetrical sawtooth wave is symmetrical in structure and includes a seat, a slider, a piezoelectric stack and an elliptical ring. A pair of leaf-shaped flexible beams are arranged at a front end of a base, and a guide rail is connected between the pair of leaf-shaped flexible beams. The slider is placed on the guide rail. The piezoelectric stack is arranged in the elliptical ring with an interference fit. A front end of the elliptical ring is in contact with the guide rail, and a pre-stressed contact force between the elliptical ring and the guide rail is controlled by adjusting a screw at a rear end of the elliptical ring. A method for method for actuating bi-directional motion of the inertial piezoelectric actuator is further provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.