Patent ID: 9461479
Filing Date: 2016-10-04
CPC Classification: H02J

Claim Text:
1. A wireless power transmitter comprising: a power supply unit configured to supply an input voltage; a power conversion unit configured to generate wireless power based on a driving signal, generated by the supplied input voltage and a first pulse width modulation (PWM) signal, and transfer the wireless power to a wireless power receiver; and a power transmission control unit configured to: receive a voltage value of a battery charged with the wireless power through a wireless network, and generate the first PWM signal based on the voltage value of the battery, wherein the power transmission control unit is further configured to: generate an input current reference value based on the voltage value of the battery, a reference current value for charging the battery, and the input voltage value, generate a battery charging current value for compensating for a difference between the input current reference value and an input current value, and generate the first PWM signal based on the battery charging current value.