Wireless power transfer system
US10637298B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2018 |
| Grant date | Apr 28, 2020 |
| Priority date | — |
| Expiry date | May 12, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/05
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power transfer system with a class DE inverter for power transfer to a load. The wireless power transfer system includes a half-bridge circuit, a zero voltage switching (ZVS) tank, a shunt capacitor array, an evaluation circuit, and a controller. The half-bridge circuit has two transistors connected in series with each of the two transistors driven by a gate driving signal with a duty cycle. The ZVS tank and the shunt capacitor array are electrically connected with the half-bridge circuit. The ZVS tank includes two capacitors and an inductor. The shunt capacitor array has a capacitance that is tunable. The evaluation circuit calculates a power conversion efficiency of the system. The controller receives the power conversion efficiency from the evaluation circuit and generates control signals to adjust the duty cycle of the gate driving signal and to adjust the capacitance of the shunt capacitor array in order to maximize the power conversion efficiency of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.