Abstract: A wireless power transmitter that supplies power to a wireless power receiver. The wireless power transmitter includes a control unit, a resonator and an amplifier. The control unit generates an identification information of the wireless power transmitter. The resonator transmits power to the wireless power receiver. The amplifier drives the resonator and is controlled by the control unit such that the power transmitted by the resonator includes a first signal that carries the identification information of the wireless power transmitter. The wireless power transmitter further includes a wireless communication unit that sends a second signal having the identification information of the wireless power transmitter.

Abstract: A wireless power transfer system with a class DE inverter for power transfer to a load. The wireless power transfer system includes a half-bridge circuit, a zero voltage switching (ZVS) tank, a shunt capacitor array, an evaluation circuit, and a controller. The half-bridge circuit has two transistors connected in series with each of the two transistors driven by a gate driving signal with a duty cycle. The ZVS tank and the shunt capacitor array are electrically connected with the half-bridge circuit. The ZVS tank includes two capacitors and an inductor. The shunt capacitor array has a capacitance that is tunable. The evaluation circuit calculates a power conversion efficiency of the system. The controller receives the power conversion efficiency from the evaluation circuit and generates control signals to adjust the duty cycle of the gate driving signal and to adjust the capacitance of the shunt capacitor array in order to maximize the power conversion efficiency of the system.

Abstract: A method that prevents overload to input source and reduces parasitic inductance in an inverter circuit with dead-time control. A sensing capacitor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing capacitor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.

Abstract: A wireless power transmitter that supplies power to a wireless power receiver. The wireless power transmitter includes a control unit, a resonator and an amplifier. The control unit generates an identification information of the wireless power transmitter. The resonator transmits power to the wireless power receiver. The amplifier drives the resonator and is controlled by the control unit such that the power transmitted by the resonator includes a first signal that carries the identification information of the wireless power transmitter. The wireless power transmitter further includes a wireless communication unit that sends a second signal having the identification information of the wireless power transmitter.

Abstract: A wireless power transfer system with a class DE inverter for power transfer to a load. The wireless power transfer system includes a half-bridge circuit, a zero voltage switching (ZVS) tank, a shunt capacitor array, an evaluation circuit, and a controller. The half-bridge circuit has two transistors connected in series with each of the two transistors driven by a gate driving signal with a duty cycle. The ZVS tank and the shunt capacitor array are electrically connected with the half-bridge circuit. The ZVS tank includes two capacitors and an inductor. The shunt capacitor array has a capacitance that is tunable. The evaluation circuit calculates a power conversion efficiency of the system. The controller receives the power conversion efficiency from the evaluation circuit and generates control signals to adjust the duty cycle of the gate driving signal and to adjust the capacitance of the shunt capacitor array in order to maximize the power conversion efficiency of the system.

Abstract: A method that prevents overload to input source and reduces parasitic inductance in an inverter circuit with dead-time control. A sensing capacitor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing capacitor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.

Abstract: A method prevents shoot-through currents and reduces body-diode conduction time in an inverter circuit by changing dead times for transistors in the inverter circuit. A sensing resistor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing resistor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.

Abstract: A method prevents shoot-through currents and reduces body-diode conduction time in an inverter circuit by changing dead times for transistors in the inverter circuit. A sensing resistor senses temperatures of transistors in the inverter circuit. A delay generator changes delay times in response to receiving the temperatures of the transistors from the sensing resistor. A dead time generation unit changes the dead times for the transistors in response to changes in the delay times.