Power transmission device and power transmission and reception system
US9698873B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 2014 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Dec 30, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/90
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A power transmission device has: a plurality of power transmission units which perform wireless power transmission of strong-coupling system; a communication unit which, when the plurality of power transmission units transmit power at different timings to a power reception device, receives from the power reception device a plurality of reception power values of power each received by the power reception device and posture information of the power reception device; and a control unit which calculates a plurality of efficiencies based on power values of power transmitted by the plurality of power transmission units and the received plurality of reception power values, obtains a plurality of equal efficiency surfaces with respect to the plurality of power transmission units based on the plurality of efficiencies and the received posture information, and estimates that the power reception device is present at a position where the plurality of equal efficiency surfaces intersect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.