Transmission coil for wireless power supply, transmission antenna, wireless power transmitter, and charger
US11289268B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 24, 2020 |
| Grant date | Mar 29, 2022 |
| Priority date | — |
| Expiry date | Mar 24, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J2310/22
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transmission coil used in a wireless power transmitter includes a first coil, a second coil electrically connected in series with the first coil, and a tap provided at a connection node of the first coil and the second coil, the first coil and the second coil being stacked to at least partially overlap with each other. A transmission antenna includes the transmission coil, a first capacitor and a second capacitor connected in series with the transmission coil, and a switch provided in parallel to a series connection circuit of the second coil of the transmission coil and the second capacitor. A wireless power transmitter includes the transmission antenna and a bridge circuit that drives the transmission antenna. A charger includes the wireless power transmitter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.