Wireless power transfer to multiple receiver devices across a variable-sized area
US11133715B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 2019 |
| Grant date | Sep 28, 2021 |
| Priority date | — |
| Expiry date | Mar 25, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/402
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power receiver is described that receives power wirelessly from a transmitter coil that generates an oscillating magnetic field. The wireless power receiver includes a receiving coil circuit having a diode string formed by an outer wire, an inner wire, and diodes. Each of the diodes include a first end coupled to the outer wire and a second end coupled to the inner wire such that each of the diodes are connected in parallel with one another. A rectifier circuit is coupled to ends of the diode string. The rectifier circuit includes capacitors and rectifying diodes, where at least one of the capacitors is configured to bring the diode string into resonance with the oscillating magnetic field. The rectifying diodes rectify the induced oscillating voltage to produce a DC voltage difference between the outer wire and the inner wire, thereby powering the diodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.