KR20170092429A - Charging Coil Based on Magnetic Induction Coupling - Google Patents

Abstract

Field of the Invention The present invention relates to a magnetic inductively coupled charging coil having a high magnetic coupling efficiency by using a high magnetic permeability magnetic material and including a transmission coil and a pair of side walls and a base plate disposed around the transmission coil and made of a high magnetic permeability magnetic material, To a magnetically inductively coupled charging coil which is disposed around a coil and is composed of a side wall composed of a high magnetic permeability magnetic material and a base plate and in which a transmitting coil and a receiving coil are matched and corresponded to each other to maximize magnetic coupling efficiency.

Description

[0001] The present invention relates to a magnetic induction coupling coil,

The present invention relates to a magnetic inductively coupled charging coil and, more particularly, to a magnetic inductively coupled charging coil that maximizes charging efficiency by reducing magnetic path lines by using a high magnetic permeability magnetic material in magnetic inductive coupling .

With the recent development of various portable devices, the widespread use of battery-powered portable devices has gradually changed the focus from wired power supply technology to wireless charging technology. Wireless charging technology can unify various kinds of adapters that are different for each mobile device through standardization of technology, and it is a means for solving the inconvenience of carrying a charger. Such a wireless charging technique is typified by a magnetic resonance method and a magnetic induction method. Among them, the magnetic induction method is relatively easy to implement and has little influence on the environment by electromagnetic waves. Therefore, it is estimated that the market of wireless charging using magnetic induction method will continue to develop. This patent is intended to enhance the overall wireless charging efficiency by increasing the magnetic coupling efficiency of the charging coil in the wireless charging of the magnetic induction type.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a high-permeability magnetic material inside and outside of a wound charging coil, Accordingly, it is an object of the present invention to provide a magnetic inductively coupled charging coil having a high charging efficiency.

In order to achieve the above object, the magnetic induction-and-coupling charging coil according to the present invention is characterized in that the transmission coil is wound and arranged on a high permeability magnetic material to increase the density of magnetic force lines, And the outer side of the receiving coil is matched with the shape of the transmitting coil by matching the wall and the bottom of the receiving coil with the shape of the transmitting coil to minimize the magnetic path of the magnetic field line thereby increasing the magnetic coupling efficiency and improving the charging efficiency .

INDUSTRIAL APPLICABILITY The magnetic inductively coupled charging coil according to the present invention provides the following effects.

First, the magnetic flux density is increased by disposing the high magnetic permeability magnetic material on the inside and the outside of the transmission coil and the reception coil.

Second, the magnetic coupling efficiency is increased by making the shapes of the transmission coil and the reception coil and the magnetic material arrangement the same.

Third, as a result of the above two terms, the magnetic coupling efficiency is maximized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view and a cross-sectional view of a magnetic inductively coupled charging coil according to the present invention; FIG.
2 is a cross-sectional view of a conventional magnetic inductively coupled charging coil.
3 is a configuration diagram of a wireless charging device including a magnetic induction coupling charging coil according to the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a magnetic inductively coupled charging coil according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. These embodiments are to be considered as illustrative and not restrictive, as those skilled in the art may implement various embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In addition, the same or corresponding components are denoted by the same reference numerals regardless of the reference numerals, and redundant description thereof will be omitted. For convenience of explanation, the size and shape of each component shown may be exaggerated or reduced .

1 is a plan view and a cross-sectional view of a magnetic induction-and-coupling charging coil 100 according to the present invention.

As shown in FIG. 1, the magnetic inductively coupled charging coil according to the present invention includes a high magnetic permeability magnetic material 110 disposed around the transmission coil 111, a transmission coil 111 disposed on the high magnetic permeability magnetic material in a multi- Permeable magnetic material wall 111 disposed inside the transmission coil, a high magnetic permeability magnetic material wall 112 disposed inside the transmission coil and a high magnetic permeability magnetic material wall 113 disposed outside the transmission coil, A receiving coil 121 disposed opposite to the transmitting coil with the plastic material interposed therebetween, a high magnetic permeability magnetic material wall 122 disposed inside the receiving coil, Permeable magnetic material wall 123 disposed on the outer side of the receiving coil, and a receiving section formed of a high magnetic permeability magnetic material wall in which the receiving coil is fixed and disposed inside and outside of the receiving coil It consists of a magnetic permeability material (120). The thickness of the high magnetic permeability magnetic material disposed inside and outside the transmission coil and the reception coil is usually the same as the thickness of the coil wound.

Referring to FIG. 2, the inventive effect of the magnetic inductively coupled charging coil according to the present invention can be understood more easily. 2 is a cross-sectional view of a conventional magnetically inductively coupled charging coil 200. As shown in FIG.

The conventional magnetic inductively coupled charging coil includes a planar magnetic material 210 of a transmission part, a transmission coil 211 disposed on the planar magnetic material of the transmission part, a magnetic material 212 disposed inside the transmission coil, A plastic case 230 disposed on the transmission coil and serving as a case of a wireless charging device, a reception coil 221 disposed symmetrically with the transmission coil with the plastic case therebetween, And is composed of a planar magnetic material (220). The magnetic induction-coupling charging coil according to the present invention differs from the conventional magnetic induction-coupling charging coil 200 in that the high-permeability magnetic material is disposed in close contact with the inside and the outside of the coil.

The magnetic coupling efficiency can be expressed by the following equation (1).

(1)

In Equation (1)

Magnetic coupling efficiency,

The total magnetic flux lines of the transmission coil,

Represents a magnetic force line surrounding the reception coil in the total magnetic-field lines of the transmission coil. To increase magnetic coupling efficiency

As shown in Equation (2) below, the density of the magnetic field lines

. Density of magnetic force lines

Referring to Equation (3), the permeability of the magnetic field lines

, The density of the magnetic field lines

Which is the reason why the high magnetic permeability magnetic material is used in the present invention. Permeable magnetic material walls 112, 113, 122 and 123 are disposed on the inside and outside of the transmission coil 111 and the reception coil 121,

To maximize the magnetic coupling efficiency by increasing the density of the magnetic field lines.

(2)

(3)

3 is a configuration diagram of a wireless charging apparatus 300 including a magnetic induction coupling charging coil according to the present invention. The wireless charging apparatus includes a transmission unit 310, a transmission coil 312 that performs magnetic coupling 330 with the reception unit to transmit power from the transmission unit, a capacitor 311 for resonance of the transmission coil, And a receiving unit 320 including a receiving coil 322 for receiving power and a capacitor 321 for resonating the receiving coil and a load resistor 323 receiving power through the receiving coil.

100: magnetic induction coupling charging coil
110: High permeability magnetic material of the transmission part
111: transmission coil
112: high permeability magnetic material wall disposed inside the transmission coil
113: high permeability magnetic material wall disposed outside the transmission coil
120: High permeability magnetic material of the receiving part
121: Receiving coil
122: high permeability magnetic material wall disposed inside the receiving coil
123: high permeability magnetic material wall disposed outside the receiving coil
130: Plastic case

Claims (3)

A magnetic induction coupling charging coil that maximizes the magnetic induction coupling efficiency by maximizing the density of the magnetic flux lines while minimizing the magnetic flux lines by using a high magnetic permeability magnetic material around the transmitting coil and the receiving coil. 2. The magnetic inductively coupled charging coil according to claim 1, wherein high permeability magnetic material is disposed on both sides of the flat transmission coil and a bottom plate to minimize the magnetic path of the magnetic field lines and increase the density of the magnetic flux lines of the transmission coil. The high-permeability magnetic material according to claim 1, wherein a ratio of the magnetic force lines of the transmission coil to the reception coil is maximized by arranging the high-permeability magnetic material so that both sides of the flat plate receiving coil and the base plate are matched with the shape of the transmission coil, Magnetic inductively coupled charging coil.

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