POWER SUPPLY DEVICE

• Main Authors: TSUJIMOTO TOYOHIKO, AKIYAMA TOSHIHIRO, OZAKI TAMOTSU, OBARA HIROSHI, KUBOSHIMA MASANOBU
• Format: Patent
• Language: English; Japanese
• Published: 09.05.2016
• Subjects: CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; SYSTEMS FOR STORING ELECTRIC ENERGY

PROBLEM TO BE SOLVED: To provide power supply device that can be miniaturized.SOLUTION: A power supply device has a series circuit 1 comprising a primary coil L1 and a capacitor C1, a switching circuit 2 and a control circuit, and supplies power from the primary coil L1 to a secondary coil of a power reception device 2 in a contactless style. The switching circuit 2 alternates the direction of a voltage to be applied to the series circuit 1. The control circuit controls the frequency of the alternating operation of the switching circuit 2. The control circuit measures the voltage V1 at the contact point P2 between the primary coil L1 and the capacitor C1, and determines on the basis of the phase of the voltage V1 whether current I1 flowing through the primary coil L1 is a phase advance or a phase delay.SELECTED DRAWING: Figure 1 【課題】給電装置の小型化を図る。【解決手段】給電装置は、１次コイルＬ１及びコンデンサＣ１の直列回路１と、スイッチング回路２と、制御回路とを備え、１次コイルＬ１から受電装置の２次コイルに非接触で電力を供給する。スイッチング回路２は、直列回路１に印加する電圧の向きを交番させる。制御回路は、スイッチング回路２による交番動作の周波数を制御する。また、制御回路は、１次コイルＬ１とコンデンサＣ１との接続点Ｐ２の電圧Ｖ１を計測し、電圧Ｖ１の位相に基づいて１次コイルＬ１に流れる電流Ｉ１が進相か遅相かを判別する。【選択図】図１