Variable compensation inverter circuit and related techniques
US12348050B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 2018 |
| Grant date | Jul 1, 2025 |
| Priority date | — |
| Expiry date | Jul 26, 2038 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B70/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A high-frequency inverter architecture is provided that compensates for coupling variations in wireless power transfer (WPT) systems, while adapted to operate at a fixed frequency and maintaining high efficiency. This implementation, termed a variable compensation inverter (VCI), includes a plurality of high-frequency inverters feeding a lossless resonant network, with the inputs of the inverters fed by controllable voltages. By appropriately controlling the input voltages of the individual inverters and their relative phase-shift, the VCI can maintain near-resistive, and slightly but sufficiently inductive, loading of the inverters even as the reactance of the WPT coupler changes; hence, providing compensation while maintaining zero-voltage and near-zero-current switching. The VCI also ensures that the output power of the WPT system is maintained at a fixed level even during coupling variations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.