Overvoltage Protection in Wireless Power Transfer

摘要

Disclosed herein are a method, system and non-transitory program storage device for protecting a power converter from overvoltage conditions in wireless power transfer. In some embodiments, the power converter may use a controllable current sink to discharge an output voltage of the power converter's receiver so as to maintain the output voltage below an overvoltage threshold. In some embodiments, a peak current of the current sink may be controlled as a function of the output voltage. In some embodiments, the current sink may be enabled and/or disabled according to a duty cycle and a frequency, wherein the frequency may be maintained beyond an audible range. In some embodiments, the power converter may bypass the receiver responsive to the output voltage exceeding a limit, thus effectively disabling the power transfer from a transmitter to the receiver.