NON-CONTACT POWER SUPPLY DEVICE

To provide a non-contact power supply device which firstly is capable of performing increase/decrease change control of charge/discharge power, secondly prevents generation of electromagnetic radiation noise, and thirdly implements these operations by means of a bulk variable capacitor adopting water, etc., as a dielectric.SOLUTION: A non-contact power supply device 6 supplies power from a power transmitting coil 11 of a resonance circuit 4 at a power transmitting side to a power receiving coil L2 of a resonance circuit 7 at a power receiving side. The resonance circuit 7 at the power receiving side includes a series capacitor Cs, a parallel capacitor Cp, a series additional capacitor ΔCs and a parallel additional capacitor ΔCp. Each of the series additional capacitor ΔCs and the parallel additional capacitor ΔCp is constituted of a variable capacitor adopting water, etc., as a dielectric. By changing the capacity thereof, in the resonance circuit 7, capacity distribution between the series capacitor Cs and the parallel capacitor Cp is changed while keeping synthetic capacity and a resonant frequency constant, thereby performing change control on values of a charge voltage and charge power of a load battery R2.SELECTED DRAWING: Figure 1 【課題】 第１に、充電電力の増減変更制御が可能であると共に、第２に、電磁放射ノイズの発生が防止され、第３に、これらが誘電体に水等を採用した大容量バリコンにより実現される、非接触給電装置を提案することを目的とする。【解決手段】非接触給電装置６は、送電側の共振回路４の送電コイル１１から、受電側の共振回路７の受電コイルＬ２に、電力を供給する。受電側の共振回路７は、直列コンデンサＣｓ，並列コンデンサＣｐ，直追加コンデンサΔＣｓ，並追加コンデンサΔＣｐを有している。直追加コンデンサΔＣｓおよび並追加コンデンサΔＣｐは、水等を誘電体としたバリコンよりなり、その容量変更により、共振回路７は、合成容量そして共振周波数を一定に保ちつつ、直列コンデンサＣｓと並列コンデンサＣｐ間の容量配分が変更され、もって負荷電池Ｒ２の充電電圧そして充電電力の値を、変更制御可能となっている。【選択図】図１