WIRELESS POWER TRANSMITTER

• US 20160172871A1
• Filed: 02/19/2016
• Published: 06/16/2016
• Est. Priority Date: 10/14/2011
• Status: Active Grant

• Current Assignee: Nera Innovations Limited (Atlantic IP Services Limited)
• Original Assignee: LG Innotek Company Limited (LG Corporation)
• Inventors: JUNG, Woo Kil, LEE, Jung Oh
• Granted Patent: US 9,923,388 B2
• Time in Patent Office: Days
• CPC Class Codes: H01F 38/14 Inductive couplings for wireless supply or distribution of electric power using inductive coupling H02J50/10
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/402 the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
• CPC Class Codes: H02J 7/00 Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
• CPC Class Codes: H04B 5/00 Near-field transmission systems, e.g. inductive or capacitive transmission systems
• CPC Class Codes: H04B 5/24 Inductive coupling
• CPC Class Codes: H04B 5/79 for data transfer in combination with power transfer

Abstract

A wireless power transmitter according to an embodiment includes a coil and a capacitor which resonate with a wireless power receiver. The coil includes a plurality of cell groups and a core which connects the cell groups with each other. Each of the cell groups includes a plurality of cells. Each of the cells is configured such that magnetic field generated by currents flowing through the cells are formed in a same direction. Each of the cell groups is adjacent to at least one cell group. Each of the cell groups and the core are configured as one conductive wire.

Claims

1. A wireless power transmitter comprising:

a coil and a capacitor configured to transmit wireless power to a wireless power receiver,

wherein the coil includes a plurality of cells and a core which connects the cells with each other,

wherein each cell of the plurality of cells is adjacent to at least one other cell of the plurality of cells,

wherein each of the cells and the core are configured as one conductive wire,

wherein a direction of a magnetic field formed by a first cell of the plurality of cells is different from a direction of a magnetic field formed by a second cell of the plurality of cells, and

wherein the first and second cells are adjacent to each other and connected to each other through the core.

2. The wireless power transmitter of claim 1, wherein the magnetic field formed by the first cell is generated in an inflow direction to a center of the first cell, and the magnetic field formed by the second cell is generated in an outflow direction from a center of the second cell.

3. The wireless power transmitter of claim 1, wherein the magnetic field generated from the first cell changes a part of the magnetic field generated from the second cell so that an amount of magnetic field that leaks to the outside is minimized.

4. The wireless power transmitter of claim 1, wherein the first cell and the second cell are wound in a clockwise direction and a counterclockwise direction, respectively.

5. The wireless power transmitter of claim 1, wherein a plane formed by each cell has one of a rectangular shape and a triangular shape.

6. The wireless power transmitter of claim 1, wherein each of the cells is formed on a printed circuit board.

7. The wireless power transmitter of claim 1, wherein each of the cells is formed by the conductive wire wound at least one time.

8. The wireless power transmitter of claim 1, wherein the conductive wire includes copper.