POWER TRANSMITTER COIL IN WIRELESS CHARGING SYSTEM
A design of a power transmitter coil for a wireless charging system is disclosed. The power transmitter coil may include a square-shaped coil and two terminals. The two terminals may be extended from the coil. The coil may be routed by a wire in a plane.
1 . A power transmitter coil for a wireless charging system, comprising:
a square-shaped coil routed by a wire in a plane; and
two terminals extending from the coil.
2 . The power transmitter coil of claim 1 , wherein the coil has an outer diameter of 48-52 mm.
3 . The power transmitter coil of claim 1 , wherein the coil has an inner diameter of 35.5-39.5 mm.
4 . The power transmitter coil of claim 1 , wherein the coil has 4-6 turns of wire.
5 . The power transmitter coil of claim 1 , wherein the wire of the coil is closely routed with no spacing between adjacent turns.
6 . The power transmitter coil of claim 1 , wherein a coil type of the wire is Litz wire.
7 . The power transmitter coil of claim 1 , wherein the wire is made of copper with insulation wrapping and has an overall diameter of 1.05-1.35 mm.
8 . The power transmitter coil of claim 1 , wherein the lengths of the two terminal ends are 3 mm, and the two terminals are spaced with a distance of 5 mm.
9 . The power transmitter coil of claim 1 , wherein one terminal locates in the plane of the coil, and the other terminal locates closely contacting with plane of the coil.
10 . The power transmitter coil of claim 1 , wherein corners of the coil are rounded.
11 . A wireless charging system, comprising:
a power transmitter configured to receive an input power, the power transmitter comprising one or more power transmitter coils wirelessly coupled to one or more power receiver coils; and
a power receiver comprising the one or more power receiver coils and configured to charge a device, wherein:
the one or more power transmitter coils include a square-shaped coil routed by a wire in a plane.
12 . The system of claim 11 , wherein the one or more power transmitter coils have an outer diameter of 48-52 mm.
13 . The system of claim 11 , wherein the one or more power transmitter coils have an inner diameter of 35.5-39.5 mm.
14 . The system of claim 11 , wherein the one or more power transmitter coils have 4-6 turns of wire.
15 . The system of claim 11 , wherein the wire is closely routed with no spacing between adjacent turns.
16 . The system of claim 11 , wherein the wire is a Litz wire.
17 . The system of claim 11 , wherein the wire is made of copper with insulation wrapping and has an overall diameter of 1.05-1.35 mm.
18 . The system of claim 11 , wherein the lengths of the two terminal ends are 3 mm, and the two terminals are spaced with a distance of 5 mm.
19 . The system of claim 11 , wherein one terminal locates in the plane, and the other terminal locates closely contacting with plane.
20 . The system of claim 11 , wherein corners of the one or more power transmitter coils are rounded.