Systems and methods for controlling output power of a wireless power transmitter

摘要

Systems and methods for feedback control of output power in a wireless power transmitter are disclosed. According to one aspect, one of a voltage level at an input of a wireless power transmit coil and a level of current passing through the wireless power transmit coil are sensed. The wireless power transmitter includes a controller configured to adjust a component of the wireless power transmitter to maintain at least one of the level of current and the voltage level at a constant level.

主权项

1. A wireless power transmitter comprising:
a wireless power transmit circuit configured to conduct a transmit circuit current and transmit power to a wireless power receiver via an electromagnetic field; a sensor configured to sense a level of the transmit circuit current and generate a sensing signal; and a controller configured to receive a receiver feedback signal from the wireless power receiver and further configured to adjust a component of the transmit circuit based on the sensing signal and based at least in part on the receiver feedback signal to maintain the transmit circuit current at a substantially constant level.