Wireless power transmitter
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.
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 that 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 the plurality of cells comprises a plurality of first cells and a plurality of second cells,
wherein a direction of a magnetic field formed by each first cell of the plurality of first cells is different from a direction of a magnetic field foimed by each second cell of the plurality of second cells,
wherein the plurality of first cells and the plurality of second cells are adjacent to each other and connected to each other through the core, and
wherein the first cells and the second cells are connected to the core in an alternating fashion.
2. The wireless power transmitter of claim 1 , wherein the magnetic field formed by each first cell is generated in an inflow direction to a center of the first cell, and the magnetic field formed by each 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 each first cell changes a part of the magnetic field generated from each 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 cells and the second cells 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.