PROBLEM TO BE SOLVED: To provide a power reception device and a wireless power transmission system that can enhance a power transmission efficiency per time.SOLUTION: A power reception device 200 includes a power reception antenna 210 for receiving AC power from a power transmission antenna 110, a rectifier circuit 230 for converting the AC power to DC power, a detection circuit 260 for detecting the DC power, a load 320 driven with the DC power, a capacitor 310 for storing the DC power, a switching circuit 240 for switching the connection/non-connection between the rectifier circuit and the load and the connection/disconnection between the load and the capacitor, and a control circuit 250 for controlling the power reception device. The control circuit disconnects the rectifier circuit and the load from each other when the value of the DC power becomes equal to or lower than a power threshold value under the state that the DC power is supplied from the rectifier circuit to the load, and sets the load and the capacitor to a connection state, thereby driving the load with the DC power charged in the capacitor.SELECTED DRAWING: Figure 3

    【課題】時間当たりの電力伝送効率を向上させる。【解決手段】受電装置200は、送電アンテナ110から交流電力を受電する受電アンテナ210と、前記交流電力を直流電力に変換する整流回路230と、前記直流電力を検出する検出回路260と、前記直流電力により駆動される負荷320と、前記直流電力を蓄電する蓄電器310と、前記整流回路と前記負荷との接続/非接続及び前記負荷と前記蓄電器との接続/非接続を切替る切替回路240と、前記受電装置を制御する制御回路250と、を備える。前記制御回路は、前記整流回路から前記直流電力を前記負荷に供給する状態において、前記直流電力の値が電力閾値以下になったとき、前記整流回路と前記負荷とを非接続とし、前記負荷と前記蓄電器とを接続する状態にし、前記蓄電器に充電された前記直流電力により前記負荷を駆動する。【選択図】図3


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    Title :

    POWER RECEPTION DEVICE AND WIRELESS POWER TRANSMISSION SYSTEM


    Additional title:

    受電装置および無線電力伝送システム


    Contributors:

    Publication date :

    2017-04-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    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




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