Patent ID: 11955816
Assignee: GREEN SOLUTION TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A metal object detecting device for a wireless charging device, wherein the wireless charging device includes a transmitter coil, a first digital signal processor and a receiver coil, and the transmitter coil transmits a power signal to the receiver coil within a power supply time, the metal object detecting device comprising:
an object detection coil disposed above the transmitter coil;
a relay connected to the object detection coil; and
an object detector circuit connected to the relay and the first digital signal processor;
wherein, when the relay is turned on during an object detection time that is not overlapped with the power supply time, an oscillation signal is generated from the object detection coil and the object detector circuit as a basis for determining whether or not a metal object is close to the wireless charging device according to the oscillation signal;
wherein the relay includes a relay coil, a diode, a first switch and a second switch, the object detection coil includes a first coil and a second coil, a first terminal of the relay coil is connected to a positive terminal of the diode and the first digital signal processor, a negative terminal of the diode is connected to a second terminal of the relay coil, a second terminal of the first switch is connected to a first terminal of the first coil, and a second terminal of the second switch is connected to a second terminal of the first coil and a second terminal of the second coil.