FOREIGN OBJECT DETECTION, IN PARTICULAR FOR WIRELESS CHARGING SYSTEMS

A charging arrangement (50) for charging electrically operated devices (10) with a primary coil (52), which is suitable and designed to generate a magnetic field in order to transmit electrical energy inductively to a secondary coil, which is a component of the electrically operated device (10), wherein the charging arrangement (50) has a detection device (1) for detecting objects. According to the invention, the detection device (1) has at least one frequency generator (2), which supplies an electrical circuit (4, 6), which has at least one coil (4) and/or at least one capacitor (6), with an alternating voltage and a sensor device (12), which detects at least one electrical variable characteristic of this electrical circuit (4, 6) operated by the alternating voltage.