송전 코일(14)을 갖는 송전 장치(10), 및 수전 코일(41)을 갖는 수전 장치(40)를 구비한다. 그리고, 송전 코일(14)로부터 수전 코일(41)로 비접촉으로 전력을 송전하고, 수전 장치(40)에 탑재된 배터리(44)에 전력을 공급한다. 송전 장치(10)는, 송전 코일(14)에 공급되는 전압과 전류의 위상차로부터 역률(cosθ)을 연산하는 역률 연산부(31)와, 전력 지령값(Pbat*)에 기초하여, 송전 코일(14)에 공급하는 전력을 제어하고, 또한 역률이 미리 설정한 임계값 역률 이하로 된 경우에, 송전 코일(14)에 공급하는 전력을 억제하는 제어를 행하는 제어량 연산부(29)를 구비하고 있다. 따라서, 수전 코일(41)이 송전 코일(14)에 대하여 위치 어긋남을 일으킨 경우에는, 즉시 송전 전력을 억제할 수 있다.

    A wireless power supply system includes a power transmission device (10) having a power transmission coil (14) and a power receiving device (40) having a power receiving coil (41). The power transmission coil (14) transmits electric power to the power receiving coil (41) via a wireless connection, so as to supply the electric power to a battery (44) installed in the power receiving device (40). The power transmission device (10) includes a power factor calculator (31) configured to calculate a power factor (cos¸) based on a phase difference between a voltage and a current supplied to the power transmission coil (14), and a control amount calculator (29) configured to control electric power supplied to the power transmission coil (14) according to a power command value (Pbat*), and regulate the electric power supplied to the power transmission coil (14) when the power factor falls to a predetermined threshold power factor or less. The power transmission can therefore be regulated immediately when the power receiving coil (41) is shifted from the power transmission coil (14).


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    Title :

    WIRELESS POWER SUPPLY SYSTEM AND POWER TRANSMISSION DEVICE


    Additional title:

    비접촉 급전 시스템 및 송전 장치


    Publication date :

    2018-01-08


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung



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