Surface acoustic wave motor and apparatus having the same
US6331747A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2001 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Feb 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A surface acoustic wave motor with high energy efficiency, which may efficiently execute recovery of energy of surface acoustic waves propagated to the ends of piezoelectric substrate and re-excitation by the recovered energy, includes a comb-shaped electrode having interdigital structure for generating surface acoustic waves and two unindirectional comb-shaped electrodes having interdigital structure for recovering and re-exciting surface acoustic wave energy arranged on a piezoekextric substrate, and a slider disposed between the comb-shaped electrode for generating surface acoustic waves and the unindirectional comb-shaped electrodes for recovering and re-exciting surface acoustic wave energy. The surface acoustic wave generated by the comb-shaped electrode is recovered as electric power by unindirectional comb-shaped electrode arranged at one end of the piezoelectric substrate, and applied to the unindirectional comb-shaped electrode arranged at the other end thereof to re-excite the piezoelectric substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.