Charging frequency determination for wireless power transfer
US12168397B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 10, 2021 |
| Grant date | Dec 17, 2024 |
| Priority date | — |
| Expiry date | May 25, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A charging frequency between a transmitting coil and a receiving coil of a wireless power transfer (WPT) system is found by setting an input voltage to the transmitting coil at a fixed voltage, shunting the receiving coil, determining a first input current frequency range in which a resonant frequency is expected to be found, frequency polling within the first input current frequency range using a set of polling frequencies in the first input current frequency range, and selecting as the charging frequency a polling frequency having a lowest input current. The first input current frequency range may be found by setting the first input current frequency range based on regulation, international electromagnetic frequency allotments, or prior experience with WPT between the transmitting coil and the receiving coil. A frequency range around the input current minima is selected to poll for a charging frequency that approximates the resonant frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.