Apparatus for contactless data and energy transmission and systems containing the apparatus
US5440302A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Mar 17, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B5/79
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus for contactless data and energy transmission includes a stationary part and a movable part. The stationary part includes coils and an oscillator connected to the coils for contactless power transmission and data transmission to the movable part. The oscillator produces a reference oscillation as well as an information oscillation upon which a phase displacement relative to the reference oscillation is imposed as a function of data to be transmitted. The movable part includes other coils. One of the coils of each of the parts forms a first pair of coils through which the phase-displaced oscillation is supplied and another of the coils of each of the parts forms a second pair of coils through which the reference oscillation is supplied to the movable part. The movable part also includes a demodulator circuit connected to the other coils for receiving transmitted oscillations and recovering the data from the phase displacement. According to one embodiment, only one of the pairs of coils provide power transmission, and data transmission from the movable part to the stationary part is provided by load variation only at the coil of the movable part not being used for power t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.