US Patent Application 18223588. DEVICE AND METHOD FOR WIRELESS POWER TRANSFER simplified abstract
Contents
DEVICE AND METHOD FOR WIRELESS POWER TRANSFER
Organization Name
Inventor(s)
JOHANNES WILHELMUS Draak of Limburg (NL)
DEVICE AND METHOD FOR WIRELESS POWER TRANSFER - A simplified explanation of the abstract
This abstract first appeared for US patent application 18223588 titled 'DEVICE AND METHOD FOR WIRELESS POWER TRANSFER
Simplified Explanation
The patent application describes a wireless power transmitter or receiver that uses a power transfer coil and a controller to transfer power during specific intervals.
- The power transfer phase includes intervals where power is transferred and intervals where the power level is reduced for foreign object detection.
- A magnetic shielding element is placed between the power transfer coil and the coil of another device.
- The magnetic shielding element is made of a material that operates in a saturated and non-saturated mode during power transfer and foreign object detection intervals.
- The saturation point of the magnetic shielding element is set above the magnetic field strength generated during power transfer intervals and below that generated during foreign object detection intervals.
Original Abstract Submitted
A wireless power transmitter () or power receiver () comprises a power transfer coil () for receiving or generating a power transfer signal and a controller () for controlling the device to perform power transfer during a power transfer phase. The power transfer phase comprises power transfer intervals where power is transferred and foreign object detection time intervals during which a power level of the power transfer signal is reduced. A magnetic shielding element () is positioned between the power transfer coil () and a power transfer coil of a complementary device. The magnetic shielding element () comprises a magnetic shield material having a saturation point such that it operates in a saturated and non-saturated mode during respectively power transfer intervals and foreign object detection time intervals. The saturation point is above a magnetic field strength generated by the power transfer signal during the power transfer time intervals and below that generated during the foreign object detection time intervals.
