Multilayer piezoelectric motor
US7211929B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 2006 |
| Grant date | May 1, 2007 |
| Priority date | — |
| Expiry date | Apr 4, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10N30/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method for accelerating or decelerating a moveable body which body is moved by urging a piezoelectric micromotor to the body in a first direction so that a contact region of the piezoelectric motor is pressed to the body and exciting vibrations in the piezoelectric micromotor at the contact region in the first direction and in a second direction along a direction of motion of the body, said vibrations having a first amplitude in the first direction and a second amplitude in the second direction, the method comprising: a) for acceleration, gradually changing a ratio between the second amplitude relative to the first amplitude from substantially zero to a desired non-zero value; or b) for deceleration, gradually changing the ratio between the second amplitude relative to the first amplitude from a non-zero value to substantially zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.