KR20170021479A - Apparatus for transmitting wireless power - Google Patents

Abstract

A wireless power transmission apparatus for rapidly delivering electrical energy to a desired receiver wirelessly at a transmitter is disclosed.
The present invention relates to a wireless power receiver, comprising: a transmitter coil disposed opposite a receive coil of a wireless power receiver; a first coil disposed opposite the first coil and opposite in polarity from the polarity of the second magnet of the wireless power receiver, Includes magnets.
Thus, the present embodiment can minimize the magnetic field generated by the magnets and maximize the magnetic field generated in the transmission coil and / or the reception coil to increase the transmission efficiency (charging efficiency).

Description

[0001] APPARATUS FOR TRANSMITTING WIRELESS POWER [0002]

This embodiment relates to a wireless power transmission apparatus, and more particularly, to a wireless power transmission apparatus for rapidly transferring electric energy to a desired receiver wirelessly at a transmitter.

Recently, as the information and communication technology rapidly develops, a ubiquitous society based on information and communication technology is being made.

In order for information communication devices to be connected anytime and anywhere, sensors equipped with computer chips having communication functions should be installed in all facilities of the society. Therefore, power supply to these devices and sensors is a new problem.

In addition, not only cell phones but also music player devices such as Bluetooth handsets and iPods have been rapidly increasing, so charging the battery has become a new problem for users.

To solve this problem, wireless power transmission technology recently appeared. Wireless power transmission technology refers to a technique of wirelessly transmitting electrical energy from a transmitter to a receiver using magnetic induction principle.

Until now, energy transmission using radio has been classified into a magnetic induction type, a self resonance type, and a power transmission method using a short wavelength radio frequency.

For example, in the magnetic induction type, when two coils are adjacent to each other and a current is supplied to one coil, the generated magnetic flux causes an electromotive force to the other coil, and the generated radio power can be transmitted from the radio power transmitter to the radio power receiver have.

However, while the magnetic induction method offers the advantage of transmitting power of up to several hundred kilowatts (kW), it still has a disadvantage that the maximum transmission distance is 1 centimeter (cm) or less, The charging time of the receiver is long.

It is an object of the present invention to provide a wireless power transmitter for designing a coil and a magnet for transmitting wireless power, respectively, and optimally designing the position and polarity of the magnet in the positional relationship between the coil and the magnet.

It is a further object of the present invention to provide a wireless power transmitter for shielding and designing a portion of a magnet so as not to affect the magnetic field generated in the coil described above.

It is another object of the present invention to provide a wireless power receiver for designing a coil and a magnet for receiving wireless power, respectively, and optimally designing the position and polarity of the magnet in the positional relationship between the coil and the magnet.

It is another object of the present invention to provide a radio power receiver for designing shielding a part of a magnet so as not to affect the magnetic field generated in the coil described above.

According to one embodiment, there is provided a transmitter comprising: a transmitter coil disposed opposite a receiver coil of a wireless power receiver; a transmitter coil disposed opposite the receiver coil of opposite polarity from the polarity of the second magnet of the transmitter, And a second magnet that is coupled to the first magnet.

The first magnet has a structure in which a peripheral surface except a bonding surface facing the second magnet is shielded.

The wireless power transmitter may further include a first shielding member, and the first shielding member may draw the first magnet to shield the peripheral surface of the first magnet.

The wireless power transmitter may further include a first shielding material, and the first shielding material may be adhered to a peripheral surface of the first magnet.

According to one embodiment, there is provided a wireless power transmitter comprising: a receive coil disposed opposite a transmit coil of a wireless power transmitter; and a second coil having an opposite polarity from the first magnet polarity of the wireless power transmitter, A wireless power receiver comprising a second magnet is provided.

And the second magnet has a structure in which the peripheral surface except for the bonding surface facing the first magnet is shielded by the second magnet.

The wireless power receiver may further include a second shielding member, and the second shielding member may draw the second magnet to shield the peripheral surface of the second magnet.

The wireless power receiver may further include a second shielding material, and the second shielding material may be adhered to a peripheral surface of the second magnet.

According to one embodiment, there is provided a transmitter comprising: a transmitter coil disposed opposite a receiver coil of a wireless power receiver; and a transmitter coil disposed opposite the transmitter coil and having opposite polarity from the polarity of the second magnet of the transmitter, A wireless power transmitter comprising a first magnet disposed therein.

The first magnet may have a structure in which the peripheral surface except for the bonding surface facing the second magnet is shielded and disposed.

The wireless power transmitter may further include a first shielding member, and the first shielding member may draw the first magnet to shield the peripheral surface of the first magnet.

The wireless power transmitter may further include a first shielding material, and the first shielding material may be adhered to a peripheral surface of the first magnet.

According to one embodiment, there is provided a wireless power transmitter comprising: a receive coil disposed opposite a transmit coil of a wireless power transmitter; and a plurality of first and second magnets arranged opposite to each other with opposite polarities from the polarities of the second magnets of the wireless power transmitter, And a second magnet disposed therein.

The second magnet may have a structure in which the peripheral surface except for the bonding surface facing the first magnet is shielded and disposed.

The wireless power receiver may further include a second shielding member, and the second shielding member may draw the second magnet to shield the peripheral surface of the second magnet.

The wireless power receiver may further include a second shielding material, and the second shielding material may be adhered to a peripheral surface of the second magnet.

According to one embodiment, there is provided a transmitter comprising: a transmitter coil disposed opposite a receiver coil of a wireless power receiver; a transmitter coil disposed opposite the receiver coil of opposite polarity from the polarity of the second magnet of the transmitter, And a first shielding member disposed under the transmission coil and the first magnet.

The first shielding member may include a first shielding accessory member extending along the circumferential surface so as to shield the circumferential surface of the first magnet except a bonding surface facing the second magnet.

According to one embodiment, there is provided a wireless power transmitter comprising: a receive coil disposed opposite a transmit coil of a wireless power transmitter; and a second coil disposed opposite the first magnet of opposite polarity from the polarity of the first magnet of the wireless power transmitter, And a second shielding member disposed on top of the receiving coil and the second magnet.

The second shield member may include a second shielding accessory member extending along the circumferential surface to shield the circumferential surface of the second magnet except for the abutting surface facing the first magnet.

According to one embodiment, there is provided a transmitter comprising: a transmitter coil disposed opposite a receiver coil of a wireless power receiver; a transmitter coil disposed opposite the receiver coil of opposite polarity from the polarity of the second magnet of the transmitter, And a first shielding member disposed under the transmission coil and the first magnet, respectively.

The first shielding member may include a first shielding accessory member extending along the circumferential surface to shield the circumferential surface of the first magnet except a bonding surface facing the second magnet.

According to one embodiment, there is provided a wireless power transmitter comprising: a receive coil disposed opposite a transmit coil of a wireless power transmitter; and a plurality of first and second magnets arranged opposite to each other with opposite polarities from the polarities of the first magnets of the wireless power transmitter, And a second shielding member disposed on top of the receiving coil and the second magnet.

The second shield member may include a second shielding accessory member extending along the circumferential surface to shield the circumferential surface of the second magnet except for the abutting surface facing the first magnet.

 The present embodiment minimizes the magnetic field generated by the magnets by coating the surface of the magnet formed inside the transmission coil and / or the reception coil with a shielding material or by inserting it into the shielded space, and reduces the magnetic field generated in the transmission coil and the reception coil Thereby maximizing the transfer efficiency (charging efficiency).

In addition, the present embodiment minimizes the magnetic field generated by the magnets by arranging the magnets having different polarities on the upper and lower portions of the transmission coil and / or the reception coil, thereby maximizing the magnetic field generated in the transmission coil and the reception coil, This also improves the transmission efficiency.

In addition, this embodiment minimizes the magnetic field generated in the magnets by coating the surface of the magnet with the shielding material or putting it in the shielding space together with the above-mentioned magnet arrangement having different polarities, so that the transmission coil and / The generated magnetic field can be maximized, and the transmission efficiency can also be increased.

In addition, this embodiment can increase the transmission efficiency by increasing the bonding force during the transmission / reception period due to the above-described magnet arrangement and / or shielding structure.

In addition, the present embodiment is designed so that the centers of the transmission coil and / or the reception coil coincide with each other, thereby further enhancing the transmission efficiency.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a better understanding of the present disclosure, provide embodiments of the present disclosure in conjunction with the detailed description. It is to be noted, however, that the technical features of the present disclosure are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
FIG. 1 and FIG. 2 are schematic diagrams showing an example of a wireless power transmission apparatus according to the first embodiment.
FIG. 3 is a configuration diagram illustrating a shielding structure that is different from the shielding structure of the wireless power transmission apparatus of FIG. 2 according to the first embodiment.
FIG. 4 and FIG. 5 are schematic diagrams showing an example different from the structure of the wireless power transmission apparatus of FIGS. 1 to 3 according to the second embodiment.
6 is a configuration diagram illustrating a shielding structure that is different from the shielding structure of the wireless power transmission apparatus of FIG. 5 according to the second embodiment.
7 is a configuration diagram illustrating an example of a wireless power transmission apparatus according to the third embodiment.
FIG. 8 is a configuration diagram illustrating an example different from the structure of the wireless power transmission apparatus of FIG. 7 according to the fourth embodiment.

The devices disclosed in the following embodiments will be described in more detail with reference to the drawings. The terms used in the following examples are used only to illustrate a specific example and are not limited thereto.

For example, terms including ordinals such as "first" and "second" can be used to describe various elements, but the elements are not limited by these terms. The terms are used to distinguish one component from another.

It is to be understood that the "and / or" disclosed in the following embodiments include any and all possible combinations of one or more of the listed related items.

The terms "comprising", "having", "having", or "having" and the like, which are disclosed in the following embodiments, mean that a constituent element can be implanted unless otherwise specifically stated, But should be understood to include other components as well.

As used in the description of the embodiments disclosed in the following embodiments and in the claims, the singular expression " above " may be understood to include plural representations unless the context clearly dictates otherwise.

In the description of the embodiments, a wireless power transmission device may be referred to as a wireless power receiver (also abbreviated as a 'receiver') and / or a wireless power transmitter that wirelessly transmits power to the wireless power receiver .

The wireless power receiver and / or the wireless power transmitter presents a structure in which coils are disposed so as to face each other, and magnets having different polarities are disposed in the inside or the upper and lower outer peripheries of the coils.

Furthermore, the wireless power receiver and / or the wireless power transmitter may be coated for each of the different magnet arrangements described above, or may be enclosed within the shielding structure except for the junction surface, so that the magnetic field generated by each magnet affects the magnetic field of the coils And the like.

Hereinafter, the structure of various wireless power transmission apparatuses for maximizing the above-described characteristics will be described in detail.

≪ Embodiment 1 >

FIG. 1 and FIG. 2 are schematic diagrams showing an example of a wireless power transmission apparatus according to the first embodiment.

1, a wireless power transmission apparatus 100 according to a first embodiment may include a power source 110, a wireless power transmitter 120, a wireless power receiver 130, and a payload 140 .

The power source 110 may generate and transmit AC power having a predetermined frequency to the wireless power transmitter 120. [

The wireless power transmitter 120 includes ds connected to both ends of the power source 110 and a first magnet 122 disposed at the inner center of the transmission coil 121. [

Such a wireless power transmitter 120 may be configured in a pad or cradle configuration, but is not limited thereto.

The transmitting coil 121 (also referred to as a 'primary coil') is connected to both ends of the power source 110 and comprises several number of turns.

Thereby, the transmission coil 121 receives AC power from the power source 110, generates an AC current by the supplied AC power, and can generate a magnetic field (yellow region) of magnetic induction by an AC current.

The transmission coil 121 may include a transmission induction coil (not shown) and a transmission resonance coil (not shown) that are inductively coupled.

The transmission induction coil generates an alternating current by the alternating current supplied from the power source 110, and the alternating current can also be induced in the transmission resonance coil physically separated through the electromagnetic induction by the alternating current.

The power transmitted to the transmitting resonant coil can be transmitted to the wireless power receiver 130 having the same resonant frequency by resonance.

The first magnet 122 is disposed at the inner center of the transmitting coil 121 and the thickness of the first magnet 122 may be equal to or greater than or equal to the thickness of the transmitting coil 121. [ The thickness of the first magnet 122 and the area of the first magnet 122 may vary depending on the intensity of the magnetic flux density required in the first magnet 122 and the occupied area of the first magnet 122. [

An optimal design for the thickness and area of the first magnet 122 is disclosed in U.S. Application No. 61 / 932,258, filed January 28, 2014, by the same applicant. Therefore, this application is equally applicable to this embodiment.

When the current flowing through the transmission coil 121 is changed, the first magnet 122 is connected to the N pole and the S pole, and the induced magnetic power can be generated by varying the magnetic flux according to the changed current.

The wireless power receiver 130 includes a receive coil 131 disposed oppositely from the transmit coil 121 and a second magnet 132 disposed opposite the first magnet 122. [

The receiving coil 131 (also referred to as a 'secondary coil') may be disposed inside the wireless power receiver 130 in opposition to the transmitting coil 121, and may have a number of turns to have a void space structure in the central region .

The receiving coil 131 receives the induced current by passing the magnetic field generated by the current flowing through the transmitting coil 121. Thereby, the wireless power receiver 130 is to receive wireless power from the wireless power transmitter 120. [

Furthermore, the receiving coil 131 includes a receiving resonant coil (not shown) and a receiving induction coil (not shown), as well as the transmitting coil 121, so that it can receive radio power through it.

For example, the reception resonance coil can receive the power transmitted from the transmission resonance coil using the frequency resonance method. An AC current can flow in the reception resonant coil due to the received power and the electric power delivered to the reception resonant coil can be transmitted to the reception induction coil inductively coupled to the reception resonant coil by electromagnetic induction.

Furthermore, it is preferable that the receiving coil 131 has the same size as that of the transmitting coil 121, and is arranged so as to also coincide with the center. This placement reason may be a measure to increase the efficiency of the charging by activating the magnetic field AC between the wireless power transmitter 120 and the wireless power receiver 130.

The central region of the receiving coil 131 may be smaller than the central region of the transmitting coil 121 and may be smaller in size. However, it goes without saying that the present invention is not limited thereto.

The second magnet 132 is disposed inside the wireless power receiver 130 so as to face the first magnet 122 and may be disposed in the central region of the receiving coil 131. [

These second magnets 132, like the first magnets 122, are made of N poles and S poles, but can be arranged with the opposite polarity from the polarity of the first magnets 122.

For example, when the first magnet 122 on the side facing the second magnet 131 has the N pole, the second magnet 131 facing the first magnet 122 is magnetized to the S pole . Conversely, if the first magnet 122 is the S pole, the second magnet 131 facing therefrom can be magnetized to the N pole.

This helps to increase the bonding power between the wireless power transmitter 120 and the wireless power receiver 130 to increase the charging efficiency.

The thickness of the second magnet 132 may be equal to or greater than or equal to the thickness of the receiving coil 131. [ The thickness of the second magnet 132 and the area of the second magnet 132 may vary according to the intensity of the magnetic flux density required by the second magnet 132 and the occupied area of the second magnet 132. [

An optimal design for the thickness and area of the second magnet 132 is disclosed in U.S. Application No. 61 / 932,258, filed January 28, 2014, by the same applicant. Therefore, this application applies equally to this embodiment.

Accordingly, when the first magnet 122 and the second magnet 132 are disposed, a force (attracting force) can be generated between them. Because of this attraction, the separation distance between the transmission coil 121 and the reception coil 131 is reduced, so that the wireless power transmission efficiency can be increased.

However, the induced electromotive force generated by the first magnet 122 and the second magnet 132 may influence the magnetic field of the transmitting coil 121 and the receiving coil 131, thereby causing a magnetic field interference phenomenon.

In order to prevent this, the first magnet 122 provided inside the transmission coil 121 and the second magnet 132 provided inside the reception coil 131 according to the embodiment have a circumference excluding the facing surfaces facing each other It can be designed as a structure for shielding the surface.

To this end, the wireless power transmitter 120 may further include a first shielding member 123 as shown in FIG. 2, and the wireless power receiver 130 may further include a second shielding member 133.

In this case, the first shielding member 123 receives the first magnet 122 and moves the circumferential surface of the first magnet 122, excluding the joint surface of the first magnet 122 facing the second magnet 132, The first magnet 122 can be shielded from the peripheral surface.

Likewise, the second shielding member 133 is formed so as to surround the second magnet 132 and the second magnet 132 in the circumferential direction of the second magnet 132 except for the joint surface of the second magnet 132 facing the first magnet 122 The first magnet 122 can be shielded from the peripheral surface.

The attracting force between the first magnet 122 and the second magnet 132 is maintained through the joint surfaces of the first magnet 122 and the second magnet 132 and the transmission coil 121 and the reception coil 131 to prevent the interference of the magnetic field, so that the transmission efficiency (charging efficiency) can be further increased.

Lastly, the lower stage 140 according to the first embodiment may be a rechargeable device or device that is connected to the wireless power receiver 130 and charges the power transmitted from the wireless power receiver 130, e.g., DC power. For example, the loading stage 140 may indicate a battery.

Between the loading stage 140 and the wireless power receiver 130, a rectifying unit may be provided although not shown.

The rectifying unit can convert AC power received from the receiving coil 131 into DC power and supply the AC power to the lower stage 400.

Such a rectifying part may include a rectifier and a smoothing circuit. In an embodiment, the rectifier may be a silicon rectifier and may be, but is not limited to, diode D1.

The smoothing circuit can output smooth DC power by removing the AC component included in the DC power converted in the rectifier. In the embodiment, the smoothing circuit may include, but is not limited to, a rectifying capacitor C5.

On the other hand, another example of the shielding structure is shown in Fig. FIG. 3 is a configuration diagram illustrating a shielding structure that is different from the shielding structure of the wireless power transmission apparatus of FIG. 2 according to the first embodiment.

Other configurations except for the shielding structure shown in FIG. 3 are the same as those of FIG. 1, and a description thereof will be omitted.

3, the wireless power transmitter 120 according to the first embodiment may be configured to adhere to the peripheral surface of the first magnet 122 except the bonding surface of the first magnet 122 facing the second magnet 132, The second shielding member 124 may be formed of a metal.

Likewise, the wireless power receiver 130 further includes a second shielding member 134 adhered to the peripheral surface of the second magnet 132 except for the joint surface of the second magnet 132 facing the first magnet 122 .

By adhering the first shielding member 124 and the second shielding member 134 as described above, it is possible to maintain the attraction state through the joint surface between the first magnet 122 and the second magnet 132, The transmission efficiency (charging efficiency) can be further increased by blocking magnetic field interference to the transmission coil 121 and the reception coil 131.

The first and second magnets 122 and 132 described in FIGS. 1 to 3 are made of a neodymium (Nd) magnet composed of components such as neodymium (Nd), iron (Fe), and boron (B) Ferrite magnets (Fe: Magnet), manganese (Mn), cobalt (Co) and nickel (Ni), rubber magnets made of ferrite powder and rubber, aluminum A Sm-Co magnet made of an Alnico magnet, Sm, Co, and other rare earth elements using an alloy of Ni, Co, and Fe, Samarium Cobalt Magnet).

Furthermore, the first magnet 122 and the second magnet 132 may be formed in a rectangular shape, a rhombus shape, a dish hole (circular or rectangular), a ring shape, and a sphere shape And the like. However, it goes without saying that the present invention is not limited to the above-described structure.

On the other hand, the transmission coil 121 and the reception coil 131 can be manufactured with a lead frame structure. Such an example is disclosed in U.S. Application No. 61 / 932,258, filed January 28, 2014, by the same applicant. Therefore, this application is equally applicable to this embodiment.

The wireless power receiver 130 illustrated in FIGS. 1 to 3 may be a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (personal digital assistant), a PMP A portable multimedia player), a navigation device, an MP3 player, and other small electronic devices.

≪ Embodiment 2 >

FIG. 4 and FIG. 5 are schematic diagrams showing an example different from the structure of the wireless power transmission apparatus of FIGS. 1 to 3 according to the second embodiment.

4, the wireless power transmission apparatus 200 according to the second embodiment may include a power source 210, a wireless power transmitter 220, a wireless power receiver 230, and a lower terminal 240 .

The power source 110 may generate and transmit AC power having a predetermined frequency to the wireless power transmitter 220. [

The wireless power transmitter 220 includes a transmission coil 221 connected to both ends of the power source 210 and a first magnet 222 disposed on upper and lower sides of the transmission coil 121, respectively.

Such a wireless power transmitter 120 may be configured in a pad or cradle configuration, but is not limited thereto.

The transmission coil 221 is connected to both ends of the power source 210 and is made up of several number of turns.

Thereby, the transmission coil 221 receives AC power from the power source 110, generates an AC current by the supplied AC power, and can generate a magnetic field (yellow region) of magnetic induction by an AC current.

The transmission coil 121 may include a transmission induction coil (not shown) and a transmission resonance coil (not shown) that are inductively coupled to each other. However, the transmission coil 121 has been described above, and a description thereof will be omitted.

The thickness of the first magnet 222 may be equal to or greater than or equal to the thickness of the transmission coil 221. The thickness of the first magnet 222 may be greater than or equal to the thickness of the transmission coil 221. [ The thickness of the first magnet 222 and the area of the first magnet 222 may vary according to the intensity of the magnetic flux density required by the first magnet 222 and the occupied area of the first magnet 222. [

An optimal design for the thickness and area of the first magnet 222 is disclosed in U.S. Application No. 61 / 932,258, filed January 28, 2014, by the same applicant. Therefore, this application is equally applicable to this embodiment.

When the current flowing through the transmission coil 121 is changed, the first magnet 222 is connected to the N pole and the S pole. The first magnet 222 can generate the induced electromotive force by changing the magnetic flux according to the changed current.

However, since the induced electromotive force thus generated is formed not in the transmission coil 121 but at the upper and lower outer sides of the transmission coil 121, the influence on the magnetic field generated in the transmission coil 221 can be minimized.

In an embodiment, the wireless power receiver 230 includes a receive coil 231 disposed opposite from the transmit coil 221 and a second magnet 232 disposed opposite the first magnet 222.

The receiving coil 231 may be arranged inside the wireless power receiver 230 in opposition to the transmitting coil 221 and may have several turns and have a structure of empty space in the central area.

The receiving coil 231 receives the induced current by passing the magnetic field generated by the current flowing through the transmitting coil 221. Thereby, the wireless power receiver 230 is to receive wireless power from the wireless power transmitter 120. [

Furthermore, the receiving coil 231 includes a receiving resonant coil (not shown) and a receiving induction coil (not shown) in the same manner as the transmitting coil 221, thereby receiving radio power through it. Since this example has been fully described in Fig. 1, its description will be omitted.

Furthermore, it is preferable that the receiving coil 231 has the same size as the transmitting coil 221 and is arranged so as to also coincide with the center. This placement reason may be a measure for activating and increasing the magnetic field AC between the wireless power transmitter 220 and the wireless power receiver 230 to increase the charging efficiency.

The center region of the receiving coil 231 may be smaller than the central region of the transmitting coil 221 and may be smaller in size. However, it goes without saying that the present invention is not limited thereto.

The second magnets 232 may be respectively arranged at the upper and lower outer edges of the receiving coil 231 so as to face the first magnet 222 and may be respectively disposed around the center origin of the receiving coil 231.

The reason for this arrangement is to lessen the influence of the magnetic field generated in the reception coil 231. [

These second magnets 232, like the first magnets 122, are formed of N poles and S poles, but may be disposed with the opposite polarity from the polarity of the first magnets 222.

For example, when the first magnet 222 facing the second magnet 231 is magnetized to the N pole, the second magnet 231 facing the first magnet 222 is magnetized to the S pole, . Conversely, if the first magnet 222 is the S pole, the second magnet 231 facing therefrom can be magnetized to the N pole.

If the opposite poles of the first magnet 222 and the second magnet 231 are opposite to each other, a pulling force (attractive force) is generated between the wireless power transmitter 220 and the wireless power receiver 230 It can help to increase the bonding force and increase the charging efficiency.

The thickness of the second magnet 232 may be equal to or greater than or equal to the thickness of the receiving coil 231. [ The thickness of the second magnet 232 and the area of the second magnet 232 may vary depending on the intensity of the magnetic flux density required in the second magnet 232 and the occupied area of the second magnet 232. [

This is because the optimal design for the thickness and area of the second magnet 232 is disclosed in U.S. Patent Application Serial No. 61 / 932,258 filed on January 28, 2014 by the same applicant, and a description thereof will be omitted.

However, the induced electromotive force generated by the first magnet 222 and the second magnet 232 may affect the magnetic field of the transmitting coil 221 and the receiving coil 231 to cause a magnetic field interference phenomenon .

To prevent this, the first magnet 222 formed on the upper and lower outer sides of the transmission coil 221 according to the embodiment and the second magnet 232 formed on the upper and lower outer sides of the reception coil 231 are formed in the circumferences It can be designed as a structure for shielding the surface.

To this end, the wireless power transmitter 220 may further include a first shielding member 223 as shown in FIG. 5, and the wireless power receiver 230 may further include a second shielding member 233.

In this case, the first shielding member 223 receives the first magnet 222 and moves the peripheral surface of the first magnet 222, except for the joint surface of the first magnet 222 facing the second magnet 232, The first magnet 222 can be shielded from the peripheral surface.

Similarly, the second shielding member 233 may be formed by drawing the second magnet 232 and removing the peripheral surface of the second magnet 232 except for the joint surface of the second magnet 232 facing the first magnet 222 The first magnet 222 can be shielded from the peripheral surface.

The attracting force between the first magnet 222 and the second magnet 232 is maintained through the joint surface of the first magnet 222 and the second magnet 232 and the transmission coil 221 and the receiving coil 231), it is possible to further increase the transmission efficiency (charging efficiency).

Finally, the lower stage 240 according to the second embodiment may be a rechargeable device or device that is connected to the wireless power receiver 230 and charges the power, e.g., DC power, transmitted from the wireless power receiver 230. [ For example, the loading stage 240 may indicate a battery.

A rectifying unit may be further provided between the lower stage 240 and the wireless power receiver 230, but this has been described with reference to FIG. 1, and a description thereof will be omitted.

On the other hand, another example of the shielding structure is shown in Fig. 6 is a configuration diagram illustrating a shielding structure that is different from the shielding structure of the wireless power transmission apparatus of FIG. 5 according to the second embodiment.

Other configurations except for the shielding structure shown in FIG. 6 are the same as the configuration of FIG. 4, so that a description thereof will be omitted.

6, the wireless power transmitter 220 according to the second embodiment includes a first magnet 222 and a second magnet 232. The wireless power transmitter 220 includes at least one second magnet 232, And a first shielding member 224 adhered to the surface.

Likewise, the wireless power receiver 230 includes a second shielding member 234 (not shown) bonded to the peripheral surface of the second magnet 232 except for the joint surface of the second magnet 232 facing the at least one first magnet 222 ).

The first shielding member 224 and the second shielding member 234 are disposed in this manner so that the attractive state can be maintained through the joint surface between the at least one first magnet 222 and the second magnet 232, , The transmission coil 221 and the reception coil 231 can be prevented, and the transmission efficiency (charging efficiency) can be further increased.

The components and shapes of the first and second magnets 222 and 232 and the structure of the transmission coil 221 and the reception coil 231 and the type of the wireless power receiver 230 described with reference to FIGS. The description thereof has been omitted.

≪ Third Embodiment >

7 is a configuration diagram illustrating an example of a wireless power transmission apparatus according to the third embodiment.

Referring to FIG. 7, the wireless power transmission apparatus 300 according to the third embodiment may include a wireless power transmitter 310 and a wireless power receiver 320. FIG.

The wireless power transmitter 310 includes a transmission coil 311, a first magnet 312 disposed at the center of the transmission coil 311, and a first shielding member 310 disposed below the first magnet 312 313 and a printed circuit board 314 disposed under the first shielding member 313.

The transmission coil 311 and the first magnet 312 have the same structure and function as those of the transmission coil 121 and the first magnet 122 of FIG. 1, and thus the description thereof is omitted. to be.

The upper portion of the first shielding member 313 attaches the transmission coil 311 using an adhesive and disposes the first magnet 312 inside the transmission coil 311. In other words, the first shielding member 313 is disposed under the first magnet 312 so as to shield the magnetic field induced in the transmitting coil 311 and the first magnet 312 so that the magnetic field does not affect the electronic component .

Further, the first shielding member 313 is made of a material that extends along the circumferential surface of the first magnet 312 except for the joint surface where the first magnet 312 and the second magnet 323, which will be described later, Shielding accessory member 313a.

Accordingly, the induction electromotive force induced in the remaining direction of the first magnet 312 except for the bonding surface is blocked to prevent the magnetic field of the transmission coil 311 from being influenced, thereby maximizing the transmission efficiency (charging efficiency).

On the other hand, the wireless power receiver 320 has a receiving coil 321 disposed opposite from the transmitting coil 311, and a receiving coil 322 having a polarity opposite from the polarity of the first magnet 312 and facing from the first magnet 312 A second shield 323 disposed on the upper portion of the second magnet 322 and a printed circuit board 324 disposed on the upper portion of the second shield 323, .

The receiving coil 321 and the second magnet 322 have the same structure and function as those of the receiving coil 131 and the second magnet 132 shown in FIG. 1, and thus the description thereof is omitted. to be.

Here, the lower portion of the second shielding member 323 attaches the receiving coil 321 using an adhesive, and disposes the second magnet 322 inside the receiving coil 321. In other words, the second shielding member 323 shields the magnetic field induced in the receiving coil 321 and the second magnet 322 so that the magnetic field does not affect the electronic component. .

Further, the second shielding member 323 is disposed between the second magnet 322 and the second magnet 322 so as to shield the circumferential surface of the second magnet 322 except the abutting surfaces where the first magnet 312 and the second magnet 322 face each other. And a second shielding accessory member 323a extending along the peripheral surface of the second shielding accessory member 323a.

Accordingly, the induction electromotive force induced in the remaining direction of the second magnet 322 except for the bonding surface is blocked to prevent the magnetic field of the reception coil 321 from being influenced, thereby maximizing the transfer efficiency (charging efficiency).

Particularly, since the joint surfaces where the first magnet 312 and the second magnet 322 face each other have different polarities, it is possible to increase the bonding force between the wireless power transmitter 310 and the wireless power receiver 320 And may rapidly transmit the wireless power due to the induced magnetic field induction to the wireless power receiver 320.

In addition, the present embodiment may further include a Hall sensor for detecting a magnetic flux density change width by the wireless power receiver, and a controller for comparing the detected magnetic flux density change width with a predetermined threshold to determine whether the power is transmitted.

Such arrangements are disclosed in U.S. Application No. 61 / 932,258, filed January 28, 2014 by the same applicant, and the description thereof is omitted, but the same applies in the present embodiment.

Instead of the first shielding accessory member 313a and the second shielding accessory member 323a, the first shielding member 124 and the second shielding member 134 of FIG. 2 may be used instead. As a result, the effect can be said to be the same as described above.

<Fourth Embodiment>

FIG. 8 is a configuration diagram illustrating an example different from the structure of the wireless power transmission apparatus of FIG. 7 according to the fourth embodiment.

Referring to FIG. 8, the wireless power transmission apparatus 400 according to the fourth embodiment may include a wireless power transmitter 410 and a wireless power receiver 420. FIG.

The wireless power transmitter 410 includes a transmission coil 411 and a first magnet 412 disposed at the left and right outer sides of the transmission coil 311. The transmission coil 411 is connected to the transmission coil 411, A first shielding member 413 disposed on the first shielding member 413 and a printed circuit board 414 disposed under the first shielding member 413.

Since the transmit coil 411 and the first magnet 312 have the same structure and function as those of the transmission coil 221 and the first magnet 222 of FIG. 4, the description thereof is omitted, to be.

Here, the upper portion of the first shielding member 413 attaches the transmission coil 411 using an adhesive, and the first magnet 412 is disposed on the left and right outer sides of the transmission coil 411, respectively.

In other words, the first shielding member 413 shields the magnetic field induced in the transmitting coil 411 and the first magnet 412, so that the magnetic field does not affect the electronic component (not shown) Respectively.

Further, the first shielding member 413 is made of a material that extends along the peripheral surface of the first magnet 412 except for the joint surface where the first magnet 412 and the second magnet 423, which will be described later, Shielding accessory member 413a.

Thus, the induction electromotive force induced in the remaining direction of the first magnet 412 except for the bonding surface is blocked to prevent the magnetic field of the transmission coil 411 from being influenced, thereby maximizing the transmission efficiency (charging efficiency).

On the other hand, the radio power receiver 420 has a reception coil 421 disposed opposite from the transmission coil 411, and a reception coil 422 having a reverse polarity from the polarity of the first magnet 412, opposite from the first magnet 412 A second shielding member 423 disposed above the receiving coil 421 and the second magnet 422 and a second shielding member 423 disposed above the second shielding member 423 Lt; RTI ID = 0.0 &gt; 424 &lt; / RTI &gt;

The receiving coil 421 and the second magnet 422 have the same structure and function as those of the receiving coil 231 and the second magnet 232 of FIG. 4, and thus description thereof is omitted. to be.

The lower portion of the second shielding member 423 attaches the receiving coil 421 using an adhesive and disposes the second magnet 422 on the left and right outer sides of the receiving coil 421.

In other words, the second shielding member 423 shields the magnetic field induced in the receiving coil 321 and the second magnet 422 and places it on top of the second magnet 422 so that the magnetic field does not affect the electronic component .

The second shielding member 423 is disposed between the second magnet 422 and the second magnet 422 so as to shield the circumferential surface of the second magnet 422 except for the abutting surfaces where the first magnet 412 and the second magnet 422 face each other. And a second shielding accessory member 423a extending along the peripheral surface of the second shielding accessory member 423a.

Accordingly, the induction electromotive force induced in the remaining direction of the second magnet 422 excluding the contact surface is blocked, thereby preventing the influence of the induced magnetic field on the receiving coil 421, thereby maximizing the transfer efficiency (charging efficiency).

Particularly, the joint surfaces where the first magnet 412 and the second magnet 422 face each other generate attractive forces with different polarities, so that the joint force between the wireless power transmitter 410 and the wireless power receiver 420 And transmit the wireless power by the induced magnetic field induction to the wireless power receiver 420 quickly.

In addition, the present embodiment may further include a Hall sensor for detecting a magnetic flux density change width by the wireless power receiver, and a controller for comparing the detected magnetic flux density change width with a predetermined threshold value to determine whether the power is transmitted.

Such arrangements are disclosed in U.S. Application No. 61 / 932,258, filed January 28, 2014 by the same applicant, and the description thereof is omitted, but the same applies in the present embodiment.

Instead of the first shielding accessory member 413a and the second shielding accessory member 423a described above, the first shielding member 224 and the second shielding member 234 of FIG. 6 may be alternatively used. As a result, the effect can be said to be the same as described above.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the exemplary embodiments or constructions. You can understand that you can do it. The embodiments described above are therefore to be considered in all respects as illustrative and not restrictive.

100: wireless power transmission device 110: power source
120: wireless power transmitter 121: transmission coil
122: first magnet 123: first shielding member
124: first shielding material 130: wireless power receiver
131: receiving coil 132: second magnet
133: second shielding member 134: second shielding member
140:

Claims (18)

A transmit coil disposed opposite the receive coil of the wireless power receiver,
A first magnet disposed opposite the first magnet and having a polarity opposite to the polarity of the second magnet of the wireless power receiver,
Wherein the first magnet comprises:
And the second magnet is disposed so as to shield the peripheral surface excluding the bonding surfaces facing each other. The method according to claim 1,
Further comprising a first shielding member,
Wherein the first shield member draws the first magnet to shield the peripheral surface of the first magnet. The method according to claim 1,
Further comprising a first shielding material,
Wherein the first shielding material is bonded to the peripheral surface of the first magnet. A receive coil disposed opposite the transmit coil of the wireless power transmitter,
And a second magnet disposed opposite to the first magnet polarity of the wireless power transmitter and having a polarity opposite to the first magnet polarity, the second magnet being disposed at the center of the receiving coil,
Wherein the second magnet comprises:
Wherein the first magnet and the second magnet are disposed so as to shield the peripheral surface excluding the bonding surfaces facing each other. 5. The method of claim 4,
Further comprising a second shielding member,
And the second shield member draws the second magnet to shield the peripheral surface of the second magnet. 5. The method of claim 4,
Further comprising a second shielding material,
And the second shielding material is bonded to the peripheral surface of the second magnet. A transmit coil disposed opposite the receive coil of the wireless power receiver,
The first and second magnets being disposed opposite to each other and having opposite polarities from the polarities of the second magnets of the wireless power receiver,
Gt; wherein &lt; / RTI &gt; 8. The method of claim 7,
Wherein the first magnet comprises:
And the second magnet is disposed so as to shield the peripheral surface excluding the bonding surfaces facing each other. 9. The method of claim 8,
Further comprising a first shielding member,
Wherein the first shield member draws the first magnet to shield the peripheral surface of the first magnet. 9. The method of claim 8,
Further comprising a first shielding material,
Wherein the first shielding material is bonded to the peripheral surface of the first magnet. A receive coil disposed opposite the transmit coil of the wireless power transmitter,
And a second magnet disposed on the upper and lower sides of the receiving coil, the second magnet being disposed opposite to the first magnet and having an opposite polarity from the polarity of the second magnet of the wireless power transmitter,
/ RTI &gt; 12. The method of claim 11,
Wherein the second magnet comprises:
And each of the first and second magnets is disposed so as to shield the peripheral surface excluding the bonding surfaces facing each other. 12. The method of claim 11,
Further comprising a second shielding member,
And the second shield member draws the second magnet to shield the peripheral surface of the second magnet. 12. The method of claim 11,
Further comprising a second shielding material,
And the second shielding material is bonded to the peripheral surface of the second magnet. A transmit coil disposed opposite the receive coil of the wireless power receiver,
A first magnet disposed opposite to the first magnet and having an opposite polarity from the polarity of the second magnet of the wireless power receiver,
And a first shielding member disposed below the transmission coil and the first magnet,
Wherein the first shielding member comprises:
And a first shielding sub-member extending along the circumferential surface so as to shield the circumferential surface of the first magnet except a joint surface facing the second magnet,
Gt; A receive coil disposed opposite the transmit coil of the wireless power transmitter,
A second magnet disposed opposite to the first magnet and having an opposite polarity from the polarity of the first magnet of the wireless power transmitter,
And a second shielding member disposed on the receiving coil and the second magnet,
Wherein the second shielding member comprises:
And a second shielding sub-member extending along the circumferential surface so as to shield the circumferential surface of the second magnet except a joint surface facing the first magnet,
Gt; A transmit coil disposed opposite the receive coil of the wireless power receiver,
A first magnet having opposite polarities from the polarities of the second magnets of the radio power receiver and disposed opposite to each other, the first magnet being disposed at left and right outer sides of the transmission coil,
And a first shielding member disposed below the transmission coil and the first magnet,
Wherein the first shielding member comprises:
And a first shielding sub-member extending along the circumferential surface so as to shield the circumferential surface of the first magnet except a joint surface facing the second magnet,
Gt; A receive coil disposed opposite the transmit coil of the wireless power transmitter,
A second magnet disposed opposite to the first magnet and having opposite polarities from the polarities of the first magnets of the wireless power transmitter,
And a second shielding member disposed on the receiving coil and the second magnet,
Wherein the second shielding member comprises:
And a second shielding sub-member extending along the circumferential surface so as to shield the circumferential surface of the second magnet except a joint surface facing the first magnet,
Gt;

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