Control apparatus of vibration-type actuator and control method of vibration-type actuator
US9853576B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 28, 2016 |
| Grant date | Dec 26, 2017 |
| Priority date | — |
| Expiry date | Jul 28, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02N2/142
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Provided is a control apparatus of a vibration-type actuator for generating an elliptical motion of contact portions by a common alternating current including a frequency determining unit for setting a frequency of the alternating current. The frequency determining unit sets the frequency of the alternating current for changing an ellipticity of the elliptical motion, within a frequency range such that ellipticity changing frequency ranges set for the vibrators are overlapped, and the ellipticity changing frequency ranges are set for the vibrators as frequency ranges between an upper limit and a lower limit, such that the lower limit is a maximum resonant frequency at a time of changing the ellipticity, and the upper limit is larger than the lower limit and is a maximum frequency for the relative movement of the driving member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.