This application provides a foreign object detection apparatus and method and a wireless charger. In the foreign object detection apparatus, a signal generation module generates a first calibration excitation signal based on first indication information received from a processing module, and generates at least two first calibration carrier signals with different initial phases by a preset phase step within a preset phase range based on the first indication information. A phase difference detection module determines, based on each first calibration carrier signal and a first current signal obtained by a foreign object detection module under an action of the first calibration excitation signal, a first phase difference between each first calibration carrier signal and the first current signal. The processing module determines a target initial phase based on the first phase difference between each first calibration carrier signal and the first current signal, and generates second indication information based on the target initial phase. The second indication information indicates the signal generation module to generate a detection carrier signal whose initial phase is the target initial phase. This application is implemented to improve foreign object detection precision.


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    Title :

    FOREIGN OBJECT DETECTION APPARATUS AND METHOD AND WIRELESS CHARGER


    Additional title:

    FREMDKÖRPERDETEKTIONSVORRICHTUNG UND -VERFAHREN UND DRAHTLOSES LADEGERÄT
    APPAREIL ET PROCÉDÉ DE DÉTECTION D'OBJETS ÉTRANGERS ET CHARGEUR SANS FIL


    Contributors:
    WANG SHUYANG (author) / WU ZHIXIAN (author) / LIU YANDING (author)

    Publication date :

    2023-05-03


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    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



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