Provided is a low cost wireless charging device by removing a converter in a receiving terminal and a communication unit between transmitting and receiving terminals. The wireless charging device of the present invention comprises: a transmitting unit including a transmitting coil, and transmitting power through the transmitting coil; and a receiving unit including a receiving coil, a battery, and a switching unit electrically interposed between the receiving coil and the battery, and charging the battery by receiving the power through the receiving coil. The switching unit includes: a switch; a first capacitor connected to the receiving coil in series; and a second capacitor connected to the receiving coil in parallel. The switching unit controls an electric connection of the first capacitor according to a switching control signal.
본 발명의 무선충전장치는, 송신 코일을 포함하고, 상기 송신 코일을 통해 전력을 송신하는 송신부; 및 수신 코일, 배터리 및 상기 수신 코일과 상기 배터리 사이에 전기적으로 개재되는 스위칭부를 포함하고, 상기 수신 코일을 통해 상기 전력을 수신하여 상기 배터리를 충전하는 수신부를 포함하고, 상기 스위칭부는 스위치, 상기 수신 코일과 직렬로 연결되는 제1 커패시터 및 상기 수신 코일과 병렬로 연결되는 제2 커패시터를 포함하고, 스위칭 제어신호에 따라 상기 제1 커패시터의 전기적 연결을 제어한다.
WIRELESS CHARGING DEVICE AND RECEIVING CIRCUIT THEREOF
무선충전장치 및 그 수신 회로
2016-11-17
Patent
Electronic Resource
Korean
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