Receiver for wireless charging system
A receiver for a wireless charging system, capable of receiving power energy using non-contact type magnetic induction, includes a coil capable of receiving the power energy and a part for generating a predetermined output power from the power energy received by the coil, a portable terminal, an NFC coil further provided outside of the coil, and a ferrite sheet further provided at the coil and the NFC coil.
1. A wireless charging receiver having a wireless charging coil capable of receiving a wireless charging energy using non-contact type magnetic induction and a part for generating a predetermined output power from the wireless charging energy received by the wireless charging coil, the wireless charging receiver comprising:
a magnetic field insulating sheet;
an NFC coil coupled with the magnetic field insulating sheet;
another coil being provided in an inside space surrounded by the NFC coil and spaced apart from the NFC coil in a mutually insulated state; and
the wireless charging coil being provided in an inside space surrounded by the other coil and spaced apart from the other coil in a mutually insulated state,
wherein a first circuit path for receiving a data through the NFC coil and a second circuit path for receiving the wireless charging energy through the wireless charging coil are mutually insulated,
wherein the magnetic field insulating sheet, the NFC coil, the other coil and the wireless charging coil are combined into a set and the set is provided in a portable device, and
wherein the NFC coil is inactive while the wireless charging coil is active.
2. The wireless charging receiver according to claim 1 , wherein the magnetic field insulating sheet comprises a silicon steel.
3. The wireless charging receiver according to claim 2 , wherein the wireless charging coil, the other coil, and the NFC coil are directly formed on a surface of the magnetic field insulating sheet without making a groove on the magnetic field insulating sheet.
4. The wireless charging receiver according to claim 2 , wherein a distance between the wireless charging coil and the NFC coil is 1 millimeter to 10 millimeters.
5. The wireless charging receiver according to claim 2 , wherein the wireless charging coil, the other coil, and the NFC coil are partially overlapped.