WIRELESS POWER TRANSFER SYSTEM CANCELING HARMONIC COMPONENT OF LEAKAGE MAGNETIC FIELD BY USING MAGNETIC SATURATION PHENOMENON AND METHOD OF OPERATING THE SAME

A wireless power transmission system comprises: a transmission unit including a plurality of transmission coils; a receiving unit including a receiving coil receiving wireless power from at least one of the plurality of transmission coils; a control unit calculating the coupling coefficient between...

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Main Authors HUH SUNG RYUL, SHIN YU JUN, AHN SEUNG YOUNG, SON SEOK HYEON, LEE BOM SON, LEE SANG UK, WOO SUNG HO, KIM HAE RIM, PARK BUM JIN, PARK DONG RYUL
Format Patent
LanguageEnglish
Korean
Published 21.06.2023
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Summary:A wireless power transmission system comprises: a transmission unit including a plurality of transmission coils; a receiving unit including a receiving coil receiving wireless power from at least one of the plurality of transmission coils; a control unit calculating the coupling coefficient between each of the plurality of transmission coils and the receiving coil, and selectively driving at least one of the transmission coils based on the calculated coupling coefficients; and a shielding unit outputting an offset magnetic field to offset harmonic components of a leakage magnetic field leaking from the plurality of transmission coils. Therefore, the wireless power transmission system can minimize the malfunction of an electronic device and adverse effects on the human body caused by the harmonic components of the leakage magnetic field. 무선 전력 전송 시스템은 복수의 송신 코일을 포함하는 송신부, 상기 복수의 송신 코일 중 적어도 하나의 송신 코일로부터 무선전력을 수신하는 수신 코일을 포함하는 수신부, 상기 복수의 송신 코일 각각과 상기 수신 코일 사이의 결합 계수를 산출하고, 상기 산출된 결합 계수에 기반하여 상기 적어도 하나의 송신 코일을 선택적으로 구동하는 제어부, 및 상기 복수의 송신 코일에서 누설되는 누설 자기장의 고조파 성분을 상쇄하는 상쇄 자기장을 출력하는 차폐부를 포함할 수 있다. 따라서, 본 발명은 누설 자기장의 고조파 성분에 의한 전자기기의 오작동과 인체에 미치는 악영향을 최소화할 수 있다.
Bibliography:Application Number: KR20210179207