To automatically supply power without performing handshake by communication.SOLUTION: A primary-side resonant circuit 110 of a power transmission device 100 includes an impedance variable element that increases the input impedance of a primary-side resonant circuit 110 such that a predetermined standby current flows in a current flowing through the primary-side coil 112 when power supply is stopped. A power receiving device 200 includes a magnetic flux amplification circuit 220 that amplifies a magnetic flux generated by a standby current flowing through the primary-side coil 112 of the primary-side resonant circuit 110. The power transmission device 100 includes a primary-side detection circuit 120 that detects a change in a voltage of the primary-side coil 112, a change in a current of the primary-side coil 112, or a change in the magnetic field in the vicinity of the primary-side coil 112, which are generated by the magnetic flux amplified by the magnetic flux amplification circuit 220.SELECTED DRAWING: Figure 1
【課題】通信によるハンドシェイクを行なわずに自動的に給電を可能とする。【解決手段】送電装置100の1次側共振回路110は、給電を停止する際に、1次側コイル112に流れる電流を予め定めた待機電流が流れるように、1次側共振回路110の入力インピーダンスを大きくするインピーダンス可変素子を有す。受電装置200は、1次側共振回路110の1次側コイル112に待機電流が流れることで発生する磁束を増幅する磁束増幅回路220を有す。送電装置100は、磁束増幅回路220で増幅された磁束により発生する、1次側コイル112の電圧の変化、1次側コイル112の電流の変化、もしくは1次側コイル112の近傍における磁界の変化を検出する1次側検出回路120を有す。【選択図】図1
CONTACTLESS POWER SUPPLY SYSTEM AND POWER RECEIVING DEVICE
非接触給電システムおよび受電装置
31.08.2022
Patent
Elektronische Ressource
Japanisch
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / B60M Speiseleitungen oder Vorrichtungen am Gleis für elektrisch angetriebene Fahrzeuge , POWER SUPPLY LINES, OR DEVICES ALONG RAILS, FOR ELECTRICALLY-PROPELLED VEHICLES / H01F MAGNETS , Magnete / H04B TRANSMISSION , Übertragung |
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