KR20170073070A - Illumination system using wireless power transmission - Google Patents

Illumination system using wireless power transmission Download PDF

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Publication number
KR20170073070A
KR20170073070A KR1020150181511A KR20150181511A KR20170073070A KR 20170073070 A KR20170073070 A KR 20170073070A KR 1020150181511 A KR1020150181511 A KR 1020150181511A KR 20150181511 A KR20150181511 A KR 20150181511A KR 20170073070 A KR20170073070 A KR 20170073070A
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South Korea
Prior art keywords
coil
receiver
power
transmitter
ferrite core
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KR1020150181511A
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Korean (ko)
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천병일
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천병일
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Priority to KR1020150181511A priority Critical patent/KR20170073070A/en
Publication of KR20170073070A publication Critical patent/KR20170073070A/en

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    • H05B37/0272—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/02—Arrangement of electric circuit elements in or on lighting devices the elements being transformers, impedances or power supply units, e.g. a transformer with a rectifier
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
    • G08C17/04—Arrangements for transmitting signals characterised by the use of a wireless electrical link using magnetically coupled devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2101/00—Point-like light sources

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

A wireless power illumination system is provided. The optical system includes a transmitter that transmits a power in a magnetic resonance manner through the first transmit coil, a plurality of receivers that receive power from the transmitter, and a plurality of receivers that are electrically coupled to the plurality of receivers, respectively, Wherein the receiver includes a ferrite core bobbin and a receiving coil for winding the outer circumferential surface of the ferrite core bobbin around a predetermined winding

Description

[0001] Illumination system using wireless power transmission [0002]

The present invention relates to a wireless power illumination system, and more particularly, to a wireless power illumination system using a magnetic resonance power transmission scheme.

The electromagnetic induction method and the magnetic inserting method are used as the wireless power transmission method. The electromagnetic induction method has a disadvantage in that the electromotive force is induced in the load side coil by the magnetic flux generated in the source side coil, and the transmission distance is short and the transmission characteristic is sensitive to the position alignment between the transmission coil and the reception coil.

On the other hand, the magnetic resonance method utilizes the resonance of the magnetic field generated through resonance mode energy coupling between the transmission coil and the reception coil, and the resonance frequency of the transmission coil and the reception coil is the same.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an illumination system using a wireless power transmission driven by a magnetic resonance method.

The technical objects of the present invention are not limited to the technical matters mentioned above, and other technical subjects not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a wireless power illumination system including a transmitter including a first transmission coil for transmitting power in a magnetic resonance manner through the first transmission coil, A plurality of receivers to be transmitted and a plurality of lights electrically connected to the plurality of receivers, respectively, wherein the receiver includes a ferrite core bobbin and a receiving coil for winding the outer circumferential surface of the ferrite core bobbin around a predetermined winding.

In some embodiments of the present invention, the ferrite core bobbin includes a body portion including a cylindrical shape having a first diameter, an outer periphery having a second diameter greater than the first diameter, And the secondary coil can wind the outer circumferential surface of the body part with the predetermined winding.

In some embodiments of the present invention, the cross-sectional area of the outer frame may be greater than the cross-sectional area of the body.

In some embodiments of the present invention, the transmitter further comprises a second transmit coil, wherein the first transmit coil transmits power at a first frequency, and the second transmit coil transmits power at a second frequency different from the first frequency And the plurality of receivers includes: a first receiver that receives power of the first frequency transmitted from the first transmission coil; and a second receiver that receives power of the second frequency transmitted from the second transmission coil And a second receiver for receiving the first signal.

In some embodiments of the present invention, the receive coil of the first receiver and the receive coil of the second receiver may be different.

In some embodiments of the invention, the illumination may include LED illumination.

According to another aspect of the present invention, there is provided a transmitter including a transmitter coil, the transmitter coil including a transmitter and a ferrite core bobbin for generating a magnetic field from supplied power, Wherein the receiver coil includes a receiver that wirelessly receives power in a magnetic resonance fashion using the magnetic field, the ferrite core having a body portion including a cylindrical shape and a body portion having a cylindrical shape, And an outer frame portion disposed at an upper end and a lower end of the portion, and the secondary coil winds the outer circumferential surface of the body portion with the predetermined winding portion.

In some embodiments of the present invention, the apparatus may further include a plurality of lights electrically connected to the plurality of receivers, respectively.

The details of other embodiments are included in the detailed description and drawings.

A wireless power illumination system according to the present invention uses a receiver including a ferrite core bobbin to perform a wireless power transmission in a magnetic resonance manner. Small ferrite core bobbins can be used to transmit power wirelessly to small lighting fixtures such as LED lighting.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a block diagram of a wireless power illumination system in accordance with an embodiment of the invention.
2 is an equivalent circuit diagram of a wireless power illumination system in accordance with an embodiment of the present invention.
3 is a perspective view of a ferrite core bobbin included in a receiver of a wireless power system according to an embodiment of the present invention.
4 is a top view of a transmit coil included in a transmitter of a wireless power system in accordance with an embodiment of the present invention.
5 is a block diagram of a wireless power system in accordance with another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. The dimensions and relative sizes of the components shown in the figures may be exaggerated for clarity of description. Like reference numerals refer to like elements throughout the specification and "and / or" include each and every combination of one or more of the mentioned items.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, a device being referred to as "directly on" or "directly above" indicates that no other device or layer is interposed in between.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation. For example, when inverting an element shown in the figures, an element described as "below" or "beneath" of another element may be placed "above" another element. Thus, the exemplary term "below" can include both downward and upward directions. The elements can also be oriented in different directions, so that spatially relative terms can be interpreted according to orientation.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. The terms " comprises "and / or" comprising "used in the specification do not exclude the presence or addition of one or more other elements in addition to the stated element.

Although the first, second, etc. are used to describe various elements or components, it is needless to say that these elements or components are not limited by these terms. These terms are used only to distinguish one element or component from another. Therefore, it is needless to say that the first element or the constituent element mentioned below may be the second element or constituent element within the technical spirit of the present invention.

Unless defined otherwise, all terms (including technical and scientific terms) used herein may be used in a sense commonly understood by one of ordinary skill in the art to which this invention belongs. Also, commonly used predefined terms are not ideally or excessively interpreted unless explicitly defined otherwise.

1 is a block diagram of a wireless power transmission system in accordance with an embodiment of the present invention.

Referring to FIG. 1, a wireless power transmission system 1 according to an embodiment of the present invention may include a transmitter 10, a receiver 20, and an illumination 30.

The transmitter 10 may be powered by the source power supply VS and provide power to the receiver 20 via the primary coil L1. It may be the wireless power transmission through the transmitting coil L1 that the transmitter 10 provides power to the receiver 20. [ More specifically, the transmitter 10 may be a magnetic resonance type wireless power transmission using a magnetic field generated in the reception coil L2 from a magnetic field generated from the transmission coil L1.

The transmitter 10 may include a transmission coil L1 for generating a magnetic field. The structure of the transmission coil L1 included in the transmitter 10 will be described later with reference to FIG.

The source power supply VS can supply power to the transmitter 10. The power source supplied by the source power source VS to the transmitter 10 may be an AC power source or a DC power source. 1, an AC / DC converter is provided between the source power supply VS and the transmitter 10 to convert AC power supplied from the source power supply VS into DC power, , And supplies the control signal to the transmission coil L1 by controlling the frequency.

The receiver 20 may be provided with power supplied from the transmitter 10. That is, when a magnetic field generated from the transmission coil L 1 is provided to the reception coil L 2 included in the receiver, a magnetic field and self-resonance are generated in the reception coil L 2 to generate an induced current, Power may be provided to the receiver 20.

The receiver 20 may be located on the transmitter 10. That is, the receiver 20 may be placed on the transmitter 10 so as to be located in the range of the magnetic field generated from the transmitting coil L1 of the transmitter 10.

In a wireless power illumination system 1 according to an embodiment of the present invention, the distance between the transmitter 10 and the receiver 20 can be up to about 50 cm.

The receiver 20 may include a ferrite core bobbin (40 in FIG. 4). The receiving coil L2 may be wound on the outer peripheral surface of the ferrite core bobbin (40 in Fig. 4).

The wireless power illumination system 1 according to an embodiment of the present invention may include a plurality of receivers 20. That is, the wireless power illumination system 1 may include a plurality of receivers 20 for wirelessly receiving power for one transmitter 10 wirelessly transmitting power in a magnetic resonance manner.

The illumination 30 receives power from the receiver 20 and can emit it in the form of light energy to the outside. The illumination 30 may include, for example, LED illumination. Although not shown, a rectifier may be connected between the receiver 20 and the illumination 30 to convert the AC power received by the receiver 20 into DC power.

2 is an equivalent circuit diagram of a wireless power illumination system in accordance with an embodiment of the present invention.

2, the transmitter 10 may include a source voltage Vs, a transmission coil L1, a first resistor R1, and a first capacitance C1. The transmission coil L1 is supplied with power from the source voltage Vs and can transmit power to the outside in a magnetic resonance manner. The first resistor R1 may be the parasitic resistance of the transmitting coil L1 and the first capacitance C1 may be the parasitic capacitance of the transmitting coil L1.

In the wireless power transmission system according to the embodiment of the present invention, the frequency of the power source provided by the source voltage Vs may be a frequency coinciding with the resonant frequency of the transmission coil L1 and the reception coil L2. More specifically, the frequency of the power source provided by the source voltage Vs may be, for example, about 100 kHz.

The resonance frequency f of the transmission coil L1 can be determined by the following equation.

Figure pat00001

Where L 1 is the inductance of the transmitting coil L 1 and C 1 is the capacitance of the first capacitance C 1 .

The receiver 20 may include a receiving coil L2, a second resistor R2, and a second capacitance C2. The second resistor R2 may be the parasitic resistance of the receiving coil L2 and the second capacitance C2 may be the parasitic capacitance of the receiving coil L2.

The receiving coil L2 generates a magnetic field derived from the magnetic field provided from the transmitting coil L1, and the two magnetic fields can be amplified in accordance with the magnetic resonance phenomenon to generate the induced current.

and k12 denotes a coupling coefficient between the transmitting coil L1 and the receiving coil L2.

In the circuit diagram of Fig. 2, the illumination 30 is illustrated as being connected in parallel with the receiver 20, but the invention is not so limited. The illumination 30 may be connected in series with the receiver 20.

3 is a diagram illustrating a transmit coil included in a wireless power illumination system in accordance with an embodiment of the present invention.

Referring to Fig. 3, the transmission coil L1 may be in the form of a square spiral. More specifically, the transmission coil L1 may be in the form of a spiral in which the rectangular-shaped coil overlaps and extends toward the center thereof. However, the present invention is not limited thereto. The transmitter 10 included in the wireless power illumination system according to an embodiment of the present invention may be, for example, in the form of a circular spiral in which the circular coil overlaps and extends toward the center.

4 is a perspective view illustrating a ferrite core bobbin included in a wireless power illumination system according to an embodiment of the present invention.

Referring to FIG. 4, the ferrite core bobbin 40 may include a body portion 25, an outer frame portion 26 disposed at the upper and lower ends of the body portion 25, and a reception coil L2.

The body portion 25 may have a cylindrical shape with a first diameter. The first diameter can be, for example, about 4-5 mm.

The outer frame 26 has a second diameter and may be disposed at the upper and lower ends of the body 25. 2, the second diameter of the outer frame 26 may be greater than the first diameter of the body 25. In other words, the size of the cross-sectional area of the outer frame portion 26 may be larger than the size of the cross-sectional area of the body portion 25. [

In the wireless power illumination system 1 according to an embodiment of the present invention, the outer frame 26 of the ferrite core bobbin 40 can function as an antenna of the receiver 20 in a wireless power illumination system. At this time, since the cross-sectional area of the outer frame 26 is larger than the cross-sectional area of the body 25, the wireless power receiving efficiency can be higher than the relatively small size of the body 25. Thus, the receiver 20 can be miniaturized.

The receiving coil L2 can wind the outer peripheral surface of the body portion 25. [ The winding of the receiving coil L2 around the outer circumferential surface of the body portion 25 may be proportional to the inductance of the receiving coil L2. That is, as the number of windings of the receiving coil L2 increases, the inductance of the receiving coil L2 may increase.

The configuration of the ferrite core bobbin 40 may vary depending on the configuration of the wireless power illumination system according to the embodiment of the present invention. That is, the frequency of the current used in the wireless power transmission using the magnetic resonance method should be equal to the resonance frequency between the transmitter 10 and the receiver 20. Therefore, the diameter and cross-sectional area of the body portion 25, the diameter and cross-sectional area of the outer frame portion 26, and the diameter of the receiving coil L2 ) May be different.

5 is a block diagram of a wireless power illumination system in accordance with another embodiment of the present invention.

Referring to FIG. 5, the transmitter 10 may include a first transmission coil L11 and a second transmission coil L12. The transmitter 10 may provide currents of different frequencies to the first transmission coil L11 and the second transmission coil L12. Specifically, the transmitter 10 may provide a current of a first frequency to the first transmission coil L11 and a current of a second frequency different from the first frequency to the second transmission coil L12.

The wireless power illumination system 2 may include a first receiver 20 and a second receiver 21. The first receiver 20 and the second receiver 21 may have different frequencies at which self resonance occurs. That is, the first receiver 20 may have a resonance frequency of a first frequency, and the second receiver 21 may have a resonance frequency of a second frequency.

Accordingly, the first receiver 20 can receive power from the first transmission coil L11 in a magnetic resonance manner, and the second receiver 21 can receive power from the second transmission coil L12.

The first receiver 20 and the second receiver 21 may have different configurations. That is, the body of the first receiver 20 and the second receiver 21 may have different diameters. In addition, the outer frame portion of the first receiver 20 and the outer frame portion of the second receiver 21 may have different diameters. Likewise, the winding coil winding the outer circumferential surface of the body portion of the first receiver 20 and the winding winding the outer circumferential surface of the body portion of the second receiver 21 may differ from each other.

The transmitter 10 wirelessly transmits power at different frequencies, thereby preventing disturbance due to interference of magnetic fields between a plurality of receivers.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: transmitter 20, 21: receiver
30: light 40: ferrite core bobbin

Claims (10)

A transmitter including a first transmit coil and transmitting power in a magnetic resonance manner via the first transmit coil;
A plurality of receivers for receiving power from the transmitter; And
And a plurality of lights electrically connected to the plurality of receivers, respectively,
The receiver includes:
Ferrite core bobbin; And
And a receiving coil for winding the outer circumferential surface of the ferrite core bobbin at a predetermined winding pitch. The method according to claim 1,
The ferrite core bobbin includes:
A body portion including a cylindrical shape having a first diameter; And
And an outer frame portion disposed at upper and lower ends of the body portion and having a second diameter larger than the first diameter,
Wherein the secondary coil coils the outer circumferential surface of the body portion with the predetermined winding. 3. The method of claim 2,
Wherein the cross-sectional area of the outer frame is greater than the cross-sectional area of the body. The method according to claim 1,
The transmitter includes:
Further comprising a second transmit coil,
Wherein the first transmitting coil transmits power at a first frequency,
Wherein the second transmitting coil transmits power at a second frequency different from the first frequency,
Wherein the plurality of receivers comprises:
A first receiver for receiving the power of the first frequency transmitted from the first transmission coil;
And a second receiver for receiving the power of the second frequency transmitted from the second transmitting coil. 5. The method of claim 4,
Wherein the receiving coil of the first receiver and the receiving coil of the second receiver are different. The method according to claim 1,
Wherein the illumination comprises an LED illumination. The method according to claim 1,
Wherein the transmitter transmits power at a frequency of 100 kHz. CLAIMS What is claimed is: 1. A transmitter comprising a transmit coil, the transmit coil comprising: a transmitter for generating a magnetic field from supplied power; And
A receiver comprising a ferrite core bobbin and a receiving coil wound around an outer circumferential surface of the ferrite core bobbin, the receiving coil including a receiver for wirelessly receiving power in a magnetic resonance manner using the magnetic field,
The ferrite core
A body portion including a cylindrical shape having a first radius; And
And an outer frame portion disposed at upper and lower ends of the body portion,
Wherein the secondary coil coils the outer circumferential surface of the body portion with the predetermined winding. 9. The method of claim 8,
And a plurality of lights electrically connected to the plurality of receivers, respectively. 9. The method of claim 8,
Wherein the cross-sectional area of the outer frame is greater than the cross-sectional area of the body.
KR1020150181511A 2015-12-18 2015-12-18 Illumination system using wireless power transmission KR20170073070A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102063007B1 (en) * 2019-06-05 2020-02-11 김문곤 Goods showcase
KR20200141229A (en) * 2019-06-10 2020-12-18 구슬이 Goods showcase

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102063007B1 (en) * 2019-06-05 2020-02-11 김문곤 Goods showcase
KR20200141229A (en) * 2019-06-10 2020-12-18 구슬이 Goods showcase

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