Piezoelectric motors and motor driving configurations
US7199507B2 · kind B2 · utility
5Cited by
26References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2005 |
| Grant date | Apr 3, 2007 |
| Priority date | — |
| Expiry date | Sep 8, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/2023
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A piezoelectric motor comprising: a piezoelectric vibrator having an axis of symmetry and a first vibration mode, which when excited generates oscillatory motion of mass points in the vibrator parallel to the axis of symmetry; and at least one friction nub having a center of mass displaced from the axis of symmetry, as a result of which displacement, when the vibration mode is excited, torque is generated on the vibrator that excites a second vibration mode of the vibrator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.