Abstract: A wireless power transmitter includes circuitry configured to determine a reflected impedance from a receiver coil at a transmitter coil and control a dead-time of one or more switching stages of a power conversion device based on the reflected impedance. A tunable matching network at the transmitter is controlled based on the reflected impedance and the dead-time of the one or more switching stages.

Abstract: A wireless power transmitter includes circuitry configured to determine a reflected impedance from a receiver coil at a transmitter coil and control a dead-time of one or more switching stages of a power conversion device based on the reflected impedance. A tunable matching network at the transmitter is controlled based on the reflected impedance and the dead-time of the one or more switching stages.

Abstract: A power signal source may provide current to a transmit coil to support wireless power transmission. The power signal source may include one or more modulators in parallel that may be phase delayed by an angle with respect to one another. The phase delay angle allows for adjustment of the magnitude of the current. The current provided to the transmit coil may be independent of the load of the transmit coil.

Abstract: A power signal source may provide current to a transmit coil to support wireless power transmission. The power signal source may include one or more modulators in parallel that may be phase delayed by an angle with respect to one another. The phase delay angle allows for adjustment of the magnitude of the current. The current provided to the transmit coil may be independent of the load of the transmit coil.

Abstract: Provided is a communication protocol for communication via power line. For example, there is a power supply equipment for communication via a power line including a controller, a power line input coupled to the power line, and a current demodulator coupled to the power line input and the controller. The controller is configured to demodulate a first portion of a power signal of the power line at the power line input using the current demodulator and to receive a first bitstream over the power line. A second bitstream may be provided by the controller in order to modulate a voltage sent from the power supply equipment to a powered device via the power line. The powered device may further demodulate the modulated voltage to extract the second bitstream sent from the power supply equipment.