Patent ID: 9065276
Filing Date: 2015-06-23
Classification: H01F,H02H,H02J

Abstract:
1. An over-voltage protection device for a resonant wireless power transmission device, the over-voltage protection device comprising: an amplifier for amplifying a transmission signal; a resonance signal generator for generating a wireless resonance signal according to the transmission signal amplified by the amplifier; a voltage detector for sensing a voltage of the wireless resonance signal generated by the resonance signal generator; and a controller for monitoring the voltage detected by the voltage detector to determine whether the voltage repetitively increases and decreases with periodicity when the voltage is greater than a reference voltage and when it is determined that the voltage is greater than a reference voltage and it is determined that the voltage of the resonance stage repetitively increases and decreases at a predetermined interval, controlling the amplifier to decrease an output of the transmission device by a value.