METHOD AND APPARATUS FOR HIGH EFFICIENCY SCALABLE NEAR-FIELD WIRELESS POWER TRANSFER

摘要

Wireless power transfer systems are provided. A wireless power transmitter can include a transistor block providing a switching mode amplifier, and a low-Q output network including a tunable supply voltage. The transistor block can be scalable. Multiple scalable transistor blocks can be incorporated in a power transfer system using a single tunable supply voltage and transmitting coil. The tunable supply voltage can be controlled by an adaptive power supply tuning circuit to accommodate for a range of loading conditions. Embodiments of the subject invention are capable of achieving high efficiency across a wide range of output power levels.