Wireless power transmitting apparatus and wireless power receiving apparatus
According to an aspect of the present invention, a wireless power transmitting apparatus of a wireless charging system includes a substrate, a first bonding layer formed on the substrate, a soft magnetic layer formed on the first bonding layer, a second bonding layer formed on the soft magnetic layer and a transmitting coil formed on the second bonding layer, wherein at least one of the first bonding layer and the second bonding layer includes a magnetic substance.
1. A wireless power transmitting apparatus of a wireless charging system, comprising:
a substrate,
a first bonding layer formed on the substrate,
a second bonding layer,
a soft magnetic layer disposed between the first bonding layer and the second bonding layer, and
a transmitting coil formed on the second bonding layer,
wherein each of the first bonding layer and the second bonding layer includes:
a first bonding agent,
a first metal ribbon disposed on the first bonding agent,
a second metal ribbon,
a magnetic layer disposed between the first metal ribbon and the second metal ribbon, the magnetic layer including a magnetic substance the magnetic layer having a lower surface directly contacting the first metal ribbon and an upper surface directly contacting the second metal ribbon, and the magnetic layer being thicker than the first metal ribbon and the second metal ribbon, and
a second bonding agent formed on the second metal ribbon,
wherein a permeability of the magnetic layer included in each of the first bonding layer and the second bonding layer is higher than a permeability of the soft magnetic layer, and
wherein a difference in the permeability between the magnetic layer and the soft magnetic layer is 100μ′ or more at a range of 100 to 300 kHz.
2. The wireless power transmitting apparatus of claim 1 , wherein the magnetic layer includes at least one of a sendust, a permalloy and MPP (Molybdenum Permalloy Powder).
3. The wireless power transmitting apparatus of claim 1 , wherein the first bonding agent and the second bonding agent include an insulation material.
4. The wireless power transmitting apparatus of claim 3 , wherein the first bonding agent and the second bonding agent include at least one of an acrylate-based organic bonding agent, an epoxy-based organic bonding agent and a silicon-based organic bonding agent.
5. The wireless power transmitting apparatus of claim 1 , wherein at least one surface of the first bonding layer and the second bonding layer is film-forming processed with an insulation material.
6. The wireless power transmitting apparatus of claim 5 , wherein the insulation material includes Sift.
7. The wireless power transmitting apparatus of claim 1 , further including a support film formed on the transmitting coil.
8. The wireless power transmitting apparatus of claim 1 , wherein the soft magnetic layer includes a composite comprising single metal powder flakes or alloy powder flakes and a polymer resin.
9. The wireless power transmitting apparatus of claim 8 , wherein the alloy powder flakes is Fe, Co and Ni alloy powder flakes or Fe, Si and Cr alloy powder flakes.
10. The wireless power transmitting apparatus of claim 8 , wherein the polymer resin includes at least one of a PV (polyvinyl)-based resin, a PE (polyethylene)-based resin and a PP (polypropylene)-based resin.
11. The wireless power transmitting apparatus of claim 1 , wherein the first bonding layer, the soft magnetic layer and the second bonding layer are sequentially stacked between the substrate and the transmitting coil.
12. The wireless power transmitting apparatus of claim 1 , wherein the transmitting coil includes a first transmitting coil, a second transmitting coil and a third transmitting coil.
13. The wireless power transmitting apparatus of claim 12 , wherein the second transmitting coil overlaps both the first and third transmitting coils, and
wherein the first and third transmitting coils are spaced apart from each other.
14. The wireless power transmitting apparatus of claim 1 , wherein each of the first metal ribbon and the second metal ribbon is a thin film formed by spreading out a metal in a single atomic unit.
15. The wireless power transmitting apparatus of claim 1 , wherein a thickness ratio of the magnetic layer to each of the first and second bonding agents is 7:3.
16. The wireless power transmitting apparatus of claim 1 , wherein the soft magnetic layer and the first bonding layer are both wider than the second bonding layer.
17. A wireless power receiving apparatus of a wireless charging system, comprising:
a substrate,
a first bonding layer formed on the substrate,
a second bonding layer,
a soft magnetic layer disposed between the first bonding layer and the second bonding layer, and
a receiving coil formed on the second bonding layer,
wherein each of the first bonding layer and the second bonding layer includes:
a first bonding agent,
a first metal ribbon disposed on the first bonding agent,
a second metal ribbon,
a magnetic layer disposed between the first metal ribbon and the second metal ribbon, the magnetic layer including a magnetic substance, the magnetic layer having a lower surface directly contacting the first metal ribbon and an upper surface directly contacting the second metal ribbon, and the magnetic layer being thicker than the first metal ribbon and the second metal ribbon, and
a second bonding agent formed on the second metal ribbon, wherein a permeability of the magnetic layer included in each of the first bonding layer and the second bonding layer is higher than a permeability of the soft magnetic layer, and
wherein a difference in the permeability between the magnetic layer and the soft magnetic layer is 100μ′ or more at a range of 100 to 300 kHz.
18. The wireless power receiving apparatus of claim 17 , wherein the first bonding layer, the soft magnetic layer and the second bonding layer are sequentially stacked between the substrate and the receiving coil.