Linear piezoelectric ultrasonic motor
US6984920B2 · kind B2 · utility
6Cited by
2References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 2, 2002 |
| Grant date | Jan 10, 2006 |
| Priority date | — |
| Expiry date | Sep 8, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/0025
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a linear motor which draws its operating power from ultrasonic vibration above the frequency of 20 kHz which is generated by piezoelectric ceramic. More particularly, the invention relates to a linear piezoelectric ultrasonic motor which linearly operates a slider due to a frictional force generated by applying sinusoidal electric field with a 90 degree phase difference to a pair of piezoelectric ceramic. This causes an elliptical mechanical vibration on a shaking beam which is connected to the piezoelectric ceramic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.