General Electric Company
CHARGING PADS AND METHODS FOR CHARGING RECEIVER DEVICES HAVING DIFFERENT FREQUENCY STANDARDS

Abstract:

A charging pad (104) includes a power drive unit (110) and a transmitting unit (112). The power drive unit (110) includes a first oscillator (114) to generate a first AC voltage signal having a first frequency, and a first amplifier (118) to amplify the first AC voltage signal. Also, the power drive unit (110) includes a second oscillator (116) to generate a second AC voltage signal having a second frequency, and a second amplifier (120) to amplify the second AC voltage signal. Additionally, the power drive unit (110) includes an adder (122) to combine the amplified first AC voltage signal and the amplified second AC voltage signal. Furthermore, the transmitting unit (112) includes a first frequency coil (150) configured to transmit the amplified first AC voltage signal having the first frequency, and a second frequency coil (152) configured to transmit the amplified second AC voltage signal having the second frequency.