Apparatuses, systems, and methods for a monotonic transfer function in wireless power transfer systems
US9148024B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 23, 2012 |
| Grant date | Sep 29, 2015 |
| Priority date | — |
| Expiry date | Mar 16, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J50/12
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A wireless power-transfer system includes a power-transmitting device and a power-receiving device. A frequency generator generates a power-transmit frequency to stimulate transmit coil and transmit resonance adjuster, which generate a near-field electromagnetic radiation at an adjustable coupling frequency. The power-receiving device includes a receive coil and a receive resonance adjuster for receiving the near-field electromagnetic radiation when the receive coil is within a coupling region of the transmit coil. The receive resonance frequency may be modified by the receive resonance adjuster. In the wireless power-transfer system, one or both of the transmit resonance adjuster and the receive resonance adjuster is configured to adjust its corresponding frequency to be sufficiently less than the power-transmit frequency such that a monotonic transfer function is developed between the power-transmit frequency and the receive resonance frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.