An apparatus and a method for detecting foreign objects in a wireless power transmitting system are disclosed. The wireless power transmitting apparatus or the wireless power receiving apparatus determines whether a foreign object is detected prior to initial charging (S205). When a foreign object is detected, the wireless power transmitting apparatus or the wireless power receiving apparatus performs a power limit operation in response to the detection of the foreign object (S225). If a foreign object is not detected prior to the initial charging, the wireless power transmitting apparatus or the wireless power receiving apparatus performs an operation of foreign object detection during charging, after charging starts (S210). If a foreign object is not detected during charging, a problem may arise in power transmission due to a fine foreign object which has not been detected, and thus, the wireless power transmitting apparatus of the wireless power receiving apparatus limits power based on a temperature sensor (S220).


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    Title :

    Apparatus and method for detecting foreign object in wireless power transmitting system


    Additional title:

    Vorrichtung und Verfahren zur Detektion von Fremdobjekten in einem drahtlosen Stromübertragungssystem
    Appareil et procédé pour détecter des objets étrangers dans un système de transmission de puissance sans fil


    Contributors:

    Publication date :

    2017-09-06


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    G01R Messen elektrischer Größen , MEASURING ELECTRIC VARIABLES / 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 / H04B TRANSMISSION , Übertragung



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