KR102083891B1 - Resonator structure for wireless power transfer system - Google Patents

Abstract

The resonator structure for wireless power transmission of the present invention includes a dielectric having a resonator for wireless power transmission and at least one exposed area for fixing the resonator in a buried form and selectively exposing a portion of the resonator. It may include.

Description

Resonator structure for wireless power transmission {RESONATOR STRUCTURE FOR WIRELESS POWER TRANSFER SYSTEM}

The present invention relates to a resonator for wireless power transmission, and more particularly, to a resonator structure for wireless power transmission suitable for application to a system for transmitting wireless power using magnetic resonance or induction.

As is well known, in a wireless power transmission system that transmits (transmits) power wirelessly, an electric field, a magnetic field, or an electromagnetic field is used. For this purpose, in the wireless power transmission system, the above-described physical quantity in a resonator or radiator is inevitably required It passes through space and is delivered to the receiver.

At this time, a lot of technical efforts are required to reduce the transmission loss, and in particular, the loss of the conductor constituting the resonator and the form for generating a resonance phenomenon at an appropriate frequency may be a major research issue.

1 is a structural diagram of an ideal resonator applicable to a wireless power transmission system.

Referring to FIG. 1, the resonator 100 has a spiral form to form a thin film, and a circular feed route 102 is coupled to the resonator 100 for impedance matching. Have Here, as shown in FIG. 2A, the resonator 100 may have a shape in which the resonator 100 is embedded in a nonmetal dielectric.

2A to 2C illustrate a form in which a conductor (resonator) is fixed to the inside or the same surface of the dielectric 104 by processing only a portion where the conductor is inserted into the rectangular dielectric 104 according to a conventional method.

However, since the dielectrics generally have electrical losses in the structures shown in FIGS. 2A-2C, there are many differences in the transmission loss of wireless power as compared to FIG. 1, which shows the ideal structure.

U.S. Patent 8,022,576 (Notice: 2011. 09. 20.)

However, in order to configure the resonator as a part of the wireless power transmission system, a mechanism (eg, a jig) for fixing the resonator is required, and the material and shape of the fixing mechanism are as important as the resonator design.

Accordingly, the present invention is to propose a resonator structure having a new type of fixed structure that can minimize transmission loss.

In addition, the present invention proposes a resonator structure suitable for realizing smooth fixation of the resonator while maintaining appropriate transmission efficiency in the wireless power transmission system.

According to an aspect of the present invention, there is provided a wireless device including a dielectric having a resonator for wireless power transmission, and at least one exposed area fixing the resonator in a buried form and selectively exposing a portion of the resonator. Provided is a resonator structure for power transmission.

The resonator of the present invention may have a circular spiral structure, and may be a conductor plate having a predetermined line width and a leading thickness.

In the dielectric of the present invention, a central cavity may be formed in a central region of the spiral structure.

The resonator of the present invention may have a rectangular spiral structure and may be a conductor plate having a predetermined line width and a leading thickness.

According to another aspect, the present invention provides a rectangular resonator for wireless power transmission, and a plurality of dielectrics each extending in a direction opposite to each other with respect to the center of the rectangle to fix each portion of the resonator in a buried form. Provided is a resonator structure for wireless power transmission including a branched dielectric.

The plurality of dielectric branches of the present invention may include four dielectric branches extending in four directions with respect to the center.

The resonator of the present invention may be a conductor plate having a spiral structure having a predetermined line width and a leading thickness.

According to another aspect of the present invention, a plurality of circular resonators for wireless power transmission and extending in the direction of each of the sides opposite to the center of the circular to fix each portion of the resonator in a buried form Provided is a resonator structure for a wireless power transmission including a dielectric having a dielectric branch of a.

In the dielectric of the present invention, a circular central cavity may be formed in a central region of the dielectric branches in the circular shape.

The plurality of dielectric branches of the present invention may include eight dielectric branches extending in eight directions with respect to the center.

The resonator of the present invention may be a conductor plate having a spiral structure having a predetermined line width and a leading thickness.

The present invention can effectively reduce the transmission loss of wireless power due to the volume of the dielectric material by suppressing the increase in the volume of the dielectric that fixes the circular or square resonator.

In the wireless power transmission system illustrated in FIGS. 1 and 2, transmission loss according to the presence or absence of a dielectric is shown in the following table. Therefore, the application of the resonator structure proposed in the present invention can be seen more clearly the effect of the invention.

That is, since the transmission loss increases as the volume of the dielectric fixing the resonator increases, a minimum mechanical structure for fixing the resonator is required.

[Loss improvement effect]

Case I) Only resonator and coil exist as shown in FIG.

: 95% transmission efficiency, resonator 18cm distance

Case II) When the dielectric (loss 0.06) is filled as shown in FIG.

: Transmission efficiency 72.69%, distance between resonators 18cm

Case III) When the loss in the dielectric is lowered to 0.03 as shown in FIG.

: Transmission efficiency 84.28%, distance between resonators 18cm

Case IV) When the fixture (loss 0.06) is configured as shown in FIG.

: Transmission efficiency 78.92%, distance between resonators 18cm

Case V) When the fixture (loss 0.06) is configured as shown in FIG.

: Transmission efficiency 85.77%, distance between resonators 18cm

Case VI) When the fixture (loss 0.06) is configured as shown in FIG.

: Transmission efficiency 92.39%, distance between resonators 18cm

Case VII) When the fixture (loss 0.06) is configured as shown in FIG.

: Transmission efficiency 87.94%, distance between resonators 18cm

1 is an ideal resonator structure diagram applicable to a wireless power transmission system,
2a to 2c are views showing a form in which the conductor is fixed to the inside or the same side of the dielectric by processing only the portion where the conductor is inserted into the rectangular dielectric according to the conventional method;
3A and 3B are plan and perspective views of a resonator structure for wireless power transmission according to an embodiment of the present invention;
4A and 4B are a plan view and a perspective view of a resonator structure for wireless power transmission according to another embodiment of the present invention;
5A and 5B are plan and perspective views of a resonator structure for wireless power transmission, according to another embodiment of the present invention;
6a and 6b are a plan view and a perspective view of a resonator structure for wireless power transmission according to another embodiment of the present invention.

First, the advantages and features of the present invention, and a method for achieving them will be apparent with reference to the embodiments described below in detail with reference to the accompanying drawings. Herein, the present invention is not limited to the embodiments disclosed below, but may be implemented in various forms, and the present embodiments are merely provided to make the disclosure of the present invention complete, and those of ordinary skill in the art to which the present invention pertains. The technical scope of the present invention should be defined by the claims, since it is provided by way of example so that those skilled in the art can clearly understand the scope of the invention.

In addition, in the following description of the present invention, if it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, terms to be described below are terms defined in consideration of functions in the present invention, which may be changed according to intention or custom of a user, an operator, or the like. Therefore, the definition should be made based on the technical idea described throughout this specification.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

Example 1

3A is a plan view of a resonator structure for wireless power transmission according to an embodiment of the present invention, and FIG. 3B is a perspective view thereof.

3A and 3B, the resonator structure of the present embodiment fixes the resonators 302a and 302b and the resonators 302a and 302b in a buried form (optional buried form) for wireless power transmission and simultaneously resonates. And a dielectric 306 formed with a plurality of exposed areas 304 to selectively expose portions of sieves 302a and 302b. Here, the dielectric 306 may be defined as a fixture for embedding the resonators 302a and 302b.

Here, the resonator denoted by reference numeral 302a means the resonator portion embedded by the dielectric 306, and the resonator denoted by reference numeral 302b is the resonator portion whose surface is exposed by each exposed region 304. Means.

In addition, the resonators 302a and 302b may be constituted by a circular spiral structure conductor plate having a predetermined line width and a leading edge, and the dielectric 306 is a central cavity 308 having a predetermined size in an approximately center region of the spiral structure. ) May be formed in a rectangular structure. Here, forming the central cavity 308 in the central region of the dielectric 306 is to reduce the volume of the dielectric 306 affecting the transmission loss. The conductor plates functioning as the resonators 302a and 302b may be constituted by conductor plates having elasticity.

Thus, the resonator structure of this embodiment selects and removes a portion of the dielectric 306 through a plurality of exposed areas 304 and a central cavity 308 that selectively expose a portion of the resonator, thereby transmitting loss for wireless power. Can be effectively suppressed.

In the present embodiment, the circular spiral structure is applied as the resonator. However, the present invention is not limited thereto, and the rectangular spiral structure having the predetermined line width and the leading thickness may be applied as the resonator. Of course there is.

Example 2

4A is a plan view of a resonator structure for wireless power transmission according to another embodiment of the present invention, and FIG. 4B is a perspective view thereof.

4A and 4B, the resonator structure of the present embodiment fixes the resonators 402a and 402b and the resonators 402a and 402b in a buried form (optional buried form) for wireless power transmission and simultaneously resonates. A plurality of cavities 404, which selectively expose portions (or front surfaces) of sieves 402a and 402b, may include dielectric 406 and the like. Here, the dielectric 406 may be defined as a fixture for embedding the resonators 402a and 402b.

Here, the resonator denoted by reference numeral 402a means the resonator portion embedded by the dielectric 406, and the resonator denoted by the reference numeral 402b denotes the resonator portion whose part is exposed through each cavity 404. it means.

In addition, the resonators 402a and 402b may be constituted by a circular spiral structure conductor plate having a predetermined line width and leading edge, and the dielectric 406 is a central cavity 408 of a predetermined size in an approximately center region of the spiral structure. ) May be formed in a circular structure.

That is, in the first embodiment, the dielectric structure is rectangular, whereas the dielectric 406 of the present embodiment has a circular structure similar to the resonators 402a and 402b. Therefore, the resonator structure of the present embodiment can remove more dielectrics than the resonator structure of the first embodiment described above.

Here, forming the central cavity 408 in the center region of the dielectric 406 is to further reduce the volume of the dielectric 406 affecting the transmission loss, as in the first embodiment described above. The conductor plates functioning as the resonators 402a and 402b may be constituted by conductor plates having elasticity.

Accordingly, the resonator structure of the present embodiment selects and removes a portion of the dielectric 406 through a plurality of cavities 404 and a central cavity 408 and a dielectric structure that selectively exposes a portion of the resonator. Suppression of transmission loss to power can be effectively realized.

Example 3

5A is a plan view of a resonator structure for wireless power transmission according to another embodiment of the present invention, and FIG. 5B is a perspective view thereof.

5A and 5B, the resonator structures of this embodiment face each other based on the centers of the rectangular resonators 502a and 502b and the inner quadrangles of the resonators 502a and 502b for wireless power transmission. Dielectrics 504 including a plurality of dielectric branches 504a to 504d each extending in (eg, up, down, left, and right directions) to fix each portion of the resonators 502a and 502b in a buried form.

Here, the resonator denoted by reference numeral 502a means the resonator portion embedded by the dielectric 504, and the resonator denoted by reference numeral 502b means the resonator portion whose front surface is exposed through the cavity 506. .

In addition, the resonator structure of the present embodiment includes a plurality of dielectric branches each extending (extending) in a direction facing each other (for example, four directions of up, down, left, and right) with respect to the center of the inner quadrangle of the resonators 502a and 502b. Since all of the dielectrics in the remaining regions except for 504a through 504d are removed, four cavities 506 are formed in which the regions are separated by respective dielectric branches 504a through 504d.

In addition, the resonator structure of the present exemplary embodiment has a structure in which a dielectric 506 is formed along the outside of the rectangular resonators 502a and 502b to block the outside of the resonators 502a and 502b from being exposed to the outside. Through this, even if four cavities 506 are formed, a rigid fixing structure for the resonators 502a and 502b can be realized.

Here, the resonators 502a and 502b may be composed of a conductive plate having a spiral structure having a predetermined line width and leading thickness, and the conductive plate may be a conductive plate having elasticity.

Meanwhile, in the present embodiment, the resonator structure has been described as having four dielectric branches and four cavities. However, the present invention is not necessarily limited thereto. Of course, it is also possible to apply a structure having a.

Example 4

6A is a plan view of a resonator structure for wireless power transmission according to another embodiment of the present invention, and FIG. 6B is a perspective view thereof.

6A and 6B, the resonator structures of this embodiment face each other based on the centers of the circular resonators 602a and 602b and the inner circles of the resonators 602a and 602b for wireless power transmission. Dielectrics 604 made of a plurality of dielectric branches 606a to 606h each extending in (eg, eight directions) to secure each portion of the resonators 602a and 602b in a buried form.

Here, the resonator denoted by reference numeral 602a refers to the resonator portion embedded by the dielectric 604, and the resonator denoted by reference numeral 602b refers to the resonator portion whose front surface is exposed through the cavity 606. .

In addition, the resonator structure of the present embodiment includes a plurality of dielectric branches 606a to 606h respectively extending (extending) in directions facing each other (for example, eight directions) with respect to the centers of the inner circles of the resonators 602a and 602b. Since all of the dielectrics in the remaining regions except for s) are removed, each cavity branch 606a to 606h forms eight cavities 606 in which the regions are separated.

In addition, the resonator structure of the present exemplary embodiment has a structure in which a dielectric 604 is formed along the outer sides of the circular resonators 602a and 602b to block the outside of the resonators 602a and 602b from being exposed to the outside. Through this, even if eight cavities 606 are formed, a rigid fixing structure for the resonators 602a and 602b can be realized.

Here, the resonators 602a and 602b may be composed of a conductive plate having a spiral structure having a predetermined line width and leading edge, and the conductor plate may be a conductive plate having elasticity or a ridge wire having no elasticity. have.

On the other hand, the resonator of the present embodiment, similarly or similarly to the above-described embodiment 2, may form a central cavity of a predetermined size having a circular shape in the approximately center region of the in-circuit dielectric branches.

On the other hand, in the present embodiment, the resonator structure has been described as having eight dielectric branches and eight cavities, but the present invention is not necessarily limited thereto, and six or five dielectric branches extending in opposite directions are provided. It is also possible to apply a structure of 6, 5, 4 or 3 cavities, and the like.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains various substitutions, modifications, changes, etc., without departing from the essential characteristics of the present invention. You will easily see this possible. That is, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments.

Therefore, the protection scope of the present invention should be interpreted by the claims to be described later, and all technical ideas within the equivalent scope will be construed as being included in the scope of the present invention.

302a, 302b, 402a, 402b, 502a, 502b, 602a, 602b: resonator
304: exposed area
306, 406, 504, 604: dielectric
308, 408: center cavity
404, 506, 606: Cavity
504a to 504d, 606a to 606h: dielectric branch

Claims (13)

A resonator,
A dielectric in contact with the resonator to fix the resonator
Including,
The dielectric is formed of a region in contact with the resonator and a region not in contact with the resonator,
And a resonator in contact with a plurality of dielectric branches extending from the center of the dielectric in opposite directions.
The method of claim 1,
The resonator is,
With a circular spiral structure
Resonator structure for wireless power transmission.
The method of claim 2,
The resonator is,
Conductor plate with preset line width and lead thickness
Resonator structure for wireless power transmission.
The method of claim 2,
The dielectric is,
The central cavity is formed in the central region of the spiral structure
Resonator structure for wireless power transmission.
The method of claim 1,
The resonator is,
With a rectangular spiral structure
Resonator structure for wireless power transmission.
The method of claim 5, wherein
The resonator is,
Conductor plate with preset line width and lead thickness
Resonator structure for wireless power transmission.
Square resonator for wireless power transmission,
A dielectric having a plurality of dielectric branches each extending in a direction opposite to each other with respect to the center of the quadrangle to fix each portion of the resonator in a buried form
Resonator structure for wireless power transmission comprising a.
The method of claim 7, wherein
The plurality of dielectric branches,
It includes four dielectric branches extending in four directions with respect to the center
Resonator structure for wireless power transmission.
The method of claim 7, wherein
The resonator is,
Spiral conductor plate with preset line width and head thickness
Resonator structure for wireless power transmission.
A circular resonator for wireless power transmission,
A dielectric having a plurality of dielectric branches each extending in the direction of each of the opposite sides with respect to the center of the circle to fix each portion of the resonator in a buried form
Resonator structure for wireless power transmission comprising a.
The method of claim 10,
The dielectric is,
A circular central cavity is formed in the central region of the dielectric branches in the circular
Resonator structure for wireless power transmission.
The method of claim 10,
The plurality of dielectric branches,
8 dielectric branches extending in 8 directions with respect to the center
Resonator structure for wireless power transmission.
The method of claim 10,
The resonator is,
Spiral conductor plate with preset line width and head thickness
Resonator structure for wireless power transmission.

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