Wireless power transmitter
A wireless power transmitter according to an exemplary embodiment in the present disclosure may include a transmitting core; a transmitting coil provided on the transmitting core and transmitting power wirelessly; and a magnetic body provided on the transmitting core and allowing a virtual line which is normal to a surface of the magnetic body to form an acute angle with the transmitting core.
1. A wireless power transmitter comprising:
a transmitting core;
a transmitting coil provided on the transmitting core to transmit power wirelessly; and
a magnetic body provided on the transmitting core and having at least one region allowing a virtual line which is normal to a surface of the magnetic body to form an acute angle with the transmitting core,
wherein the magnetic body is disposed inwardly from an internal diameter of the transmitting coil.
2. The wireless power transmitter of claim 1 , wherein the transmitting core is one of a printed circuit board, a shielding sheet having an electromagnetic field shielding function, and a magnetic core.
3. The wireless power transmitter of claim 1 , wherein the transmitting coil has a spiral shape or a helical shape.
4. The wireless power transmitter of claim 1 , wherein the transmitting coil includes a plurality of layers.
5. The wireless power transmitter of claim 1 , wherein the transmitting coil has inductance of 10 μH or less at a frequency of 6.78 MHz.
6. The wireless power transmitter of claim 1 , wherein the magnetic body is disposed in a central portion of the transmitting coil.
7. The wireless power transmitter of claim 1 , wherein a cross section of the magnetic body has a semispherical shape or a polygonal shape.
8. The wireless power transmitter of claim 1 , wherein the transmitting core is extended beyond the transmitting coil.
9. The wireless power transmitter of claim 8 , wherein an end of the transmitting core is positioned to correspond to an intersection point between a virtual line extended from a magnetic average point of the transmitting coil in a direction parallel to the transmitting core and a virtual line forming an angle of 45° with the virtual line while passing through a center point of the receiving coil wirelessly receiving power.
10. The wireless power transmitter of claim 1 , further comprising a case disposed on the transmitting coil and the magnetic body.
11. The wireless power transmitter of claim 1 , further comprising:
a power source unit receiving power from an external power source to output supply power; and
an amplifying unit amplifying the supply power to supply the amplified power to the transmitting coil.
12. The wireless power transmitter of claim 11 , wherein the transmitting coil includes:
a first coil to which the amplified power is applied; and
a second coil disposed to be spaced apart from the first coil and transmitting the amplified power induced from the first coil in an electromagnetic resonance mode.
13. A wireless power transmitter comprising:
a transmitting coil transmitting power wirelessly; and
a magnetic body disposed in a central portion of the transmitting coil and having at least one region allowing a virtual line which is normal to a surface of the magnetic body to form an acute angle with a surface which the transmitting coil is provided on,
wherein the magnetic body is disposed inwardly from an internal diameter of the transmitting coil.
14. The wireless power transmitter of claim 13 , wherein the transmitting coil has inductance of 10 μH or less at a frequency of 6.78 MHz.
15. The wireless power transmitter of claim 13 , wherein a cross section of the magnetic body has a semispherical shape or a polygonal shape.
16. The wireless power transmitter of claim 13 , further comprising:
a power source unit receiving power from an external power source to output supply power; and
an amplifying unit amplifying the supply power to supply the amplified power to the transmitting coil.
17. The wireless power transmitter of claim 16 , wherein the transmitting coil includes:
a first coil to which the amplified power is applied; and
a second coil disposed to be spaced apart from the first coil and transmitting the amplified power induced from the first coil in an electromagnetic resonance mode.