Wireless power transmission device and wireless power transmission system for wireless power transmission without a power transmission coil change
US10454317B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 2015 |
| Grant date | Oct 22, 2019 |
| Priority date | — |
| Expiry date | Sep 16, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/005
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power transmission device for wirelessly transmitting power to at least one wireless power reception device through a magnetic field, the wireless power transmission device including: a power transmission unit for generating a magnetic field, an impedance matching unit, and a control unit for controlling the impedance matching unit, the impedance matching unit including: a plurality of first circuits which include a capacitor or an inductor and are connected in series to the power transmission unit; a plurality of second circuits which include a capacitor or an inductor and are connected in parallel to the power transmission unit; a matching inductor which is connected in series to the second circuits; and a plurality of switches which are arranged in the first circuits and second circuits and open and close same.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.