KR20130112226A - Hybrid coil antenna and system for wireless power transmission using the same - Google Patents

Hybrid coil antenna and system for wireless power transmission using the same Download PDF

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Publication number
KR20130112226A
KR20130112226A KR1020120034453A KR20120034453A KR20130112226A KR 20130112226 A KR20130112226 A KR 20130112226A KR 1020120034453 A KR1020120034453 A KR 1020120034453A KR 20120034453 A KR20120034453 A KR 20120034453A KR 20130112226 A KR20130112226 A KR 20130112226A
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KR
South Korea
Prior art keywords
coil
wireless power
antenna
helical
spiral
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Application number
KR1020120034453A
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Korean (ko)
Inventor
박진석
박래혁
박운규
이지형
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엘에스전선 주식회사
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Priority to KR1020120034453A priority Critical patent/KR20130112226A/en
Publication of KR20130112226A publication Critical patent/KR20130112226A/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q11/00—Electrically-long antennas having dimensions more than twice the shortest operating wavelength and consisting of conductive active radiating elements
    • H01Q11/02—Non-resonant antennas, e.g. travelling-wave antenna
    • H01Q11/08—Helical antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
    • H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Near-Field Transmission Systems (AREA)

Abstract

PURPOSE: A hybrid coil antenna and a wireless power transmission system are provided to be manufactured in a helical shape, thereby reducing the diameter of an antenna structure. CONSTITUTION: A spiral coil unit (110) is formed in a spiral shape. The spiral coil unit has a constant diameter on a virtual plane. A helical coil unit (120) is formed in a helical shape. The spiral coil unit and the helical coil unit are rotated in the same rotation direction. The spiral coil unit and the helical coil unit are continuously connected to each other.

Description

Hybrid coil antenna and System for wireless power transmission using the same

The present invention relates to a hybrid coil antenna and a wireless power transmission / reception system using the same. More particularly, the hybrid coil antenna capable of reducing the size of a coil antenna driven at a resonant frequency of a low frequency band by improving the structure of the coil antenna and using the same It relates to a wireless power transmission and reception system.

Portable electronic devices such as mobile communication terminals, PDAs, PMPs, laptops, and the like, are commonly used as rechargeable batteries (batteries) that can be recharged with a driving power source to increase user convenience. By using such a battery as a driving power source, the user can be free from a wired environment for power supply, which makes the product more convenient to use.

The battery stores energy by charging with an external power source. In order to charge such a battery, a separate wired charging device that supplies household commercial power with the available rated power required for the battery is mainly used.

In the wired charging method, a method in which a terminal of a charging device and a terminal of a battery are electrically connected by physically contacting each other is mainly used.

However, in the above-described method, since the electrical coupling is made in a manner in which the terminals are physically coupled to each other, physical wear may occur and connection reliability may be deteriorated. There is a problem that the contact state easily becomes poor. In addition, in an environment with high moisture and humidity, problems such as an electric short-circuit accident or a loss of charged energy may occur.

In order to solve the problem of the contact charging method is disclosed a contactless charging system in which the terminal of the charging device and the battery is physically contactless, the contactless charging is known as the magnetic flux of the magnetic field in the primary coil In this case, the charging method uses a phenomenon in which power is induced to the secondary coil by a magnetic field that changes with time in an adjacent secondary coil.

Conventional contactless charging method has a wireless pad with a built-in primary coil for induction electromotive force, by a method of seating a portable electronic device equipped with a secondary coil means corresponding to the primary coil on the wireless pad Was implemented.

However, the above-described method has a coil structure for generating induced electromotive force, the transmitting side and the receiving side of the power should be adjacent to a short distance of a few mm, and the direction between the transmitting side and the receiving side exists and is aligned. As a result, the efficiency of power transmission changes drastically, and heat generation is disadvantageous.

Recently, the wireless power by the magnetic resonance method that can transfer the power in the form of magnetic field energy by concentrating the energy at a specific resonance frequency in a more advanced way that can send a relatively large power up to several meters compared to the conventional contactless charging method Transceiver systems have been proposed. However, the power transmission antenna or power reception antenna used in the conventional wireless resonance system for wireless power transmission and reception uses a resonant frequency of several tens of MHz bands, so that the diameter of the antenna is very large, so that the diameter reaches about 100 cm. There are many difficulties.

Therefore, in the technical field to which the present invention belongs, there is an urgent need for the development of a coil antenna capable of miniaturizing the size while operating at a resonant frequency of a relatively low frequency band.

The present invention has been made to solve the problems of the prior art as described above, the structure of a coil antenna that is driven at a resonant frequency of a relatively low frequency band, such as a power transmission antenna for transmitting wireless power using a magnetic resonance method Composed of a helical shape that is advantageous for reducing the diameter and a spiral shape that is advantageous for reducing the height, the present invention provides a hybrid coil antenna capable of reducing the size of the entire antenna while extending the length of the coil antenna, and a wireless power transmission / reception system using the same. There is a purpose.

According to an aspect of the present invention, there is provided a hybrid coil antenna including: a spiral coil part formed in a spiral shape having a predetermined diameter on a virtual plane formed perpendicular to a central axis direction; And a helical coil part formed in a helical shape having a predetermined height along the direction of the central axis, wherein the spiral coil part and the helical coil part are rotated in the same rotational direction and connected to each other continuously.

Preferably, the diameter of the helical coil portion is the same as the diameter of the spiral coil portion.

Preferably, the spiral coil portion and the helical coil portion are formed in a circular, elliptical, square, hexagonal or octagonal shape.

Preferably, the spiral coil portion and the helical coil portion are composed of at least one, and are alternately arranged repeatedly.

In accordance with another aspect of the present invention, there is provided a wireless power transmission / reception system, generating a wireless power signal having a resonance frequency of a specific band when commercial power is supplied, and generating the wireless power signal through an antenna for power transmission. Wireless power transmission device for transmitting to the outside in a magnetic resonance method; And a wireless power receiver configured to receive the wireless power signal through a power reception antenna in a magnetic resonance manner and convert the wireless power signal into used power, wherein the power transmission antenna and the power reception antenna are configured to magnetize the wireless power signal. A resonance coil transmitting or receiving by a resonance method, wherein the resonance coil includes a spiral coil part formed in a spiral shape having a predetermined diameter on an imaginary plane formed perpendicular to the central axis direction, and the central axis direction. The helical coil part is formed in a helical shape having a predetermined height, and the spiral coil part and the helical coil part are rotated in the same rotational direction and are connected to each other continuously.

Preferably, the resonant coil, the diameter of the helical coil portion is the same as the diameter of the spiral coil portion.

Preferably, the resonance coil, the spiral coil portion and the helical coil portion is formed in a circular, elliptical, square, hexagonal or octagonal.

Preferably, the resonant coil is formed of at least one spiral coil portion and at least one helical coil portion, and alternately and repeatedly formed.

Preferably, the resonance coil of the power transmission antenna and the resonance coil of the power reception antenna are resonated at the same resonance frequency.

Preferably, the power transmission antenna and the power receiving antenna further includes a feeding loop for supplying or receiving the wireless power signal to the resonant coil by magnetic induction.

Preferably, at least one relay coil relaying the wireless power signal is further provided in a space between the wireless power transmitter and the wireless power receiver.

Preferably, the relay coil may include a spiral coil portion formed in a spiral shape having a predetermined diameter on a imaginary plane formed perpendicular to the central axis direction, and a helical nose formed in a helical shape having a predetermined height along the central axis direction. The spiral coil part and the helical coil part are rotated in the same rotational direction and are continuously connected to each other.

Preferably, in the relay coil, the diameter of the helical coil portion is the same as the diameter of the spiral coil portion.

Preferably, the relay coil, the spiral coil portion and the helical coil portion is formed in a circular, elliptical, square, hexagonal or octagonal.

Preferably, the relay coil is formed of at least one of the spiral coil part and the helical coil part, and alternately and repeatedly formed.

Preferably, the relay coil is resonated at the same resonance frequency as the power transmission antenna and the power reception antenna.

According to the present invention, the structure of the coil antenna is composed of a helical shape that is advantageous for reducing the diameter and a spiral shape that is advantageous for reducing the height, thereby extending the length of the coil antenna and reducing the size of the entire antenna, thereby reducing the size of the relatively low frequency band. Miniaturization of the coil antenna driven at the resonance frequency is possible. Through this, it is possible to miniaturize the antenna for transmitting or receiving the wireless power by using the magnetic resonance method, it is possible to apply the magnetic resonance type wireless power transmission and reception system to portable electronic devices or small household appliances.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and, together with the description, And shall not be interpreted.
1 is a view schematically showing the configuration of a hybrid coil antenna according to the present invention.
2 is a perspective view showing an embodiment of a hybrid coil antenna according to the present invention.
FIG. 3 is an exploded perspective view of FIG. 2. FIG.
4 is a diagram schematically illustrating a wireless power transmission and reception system to which a hybrid coil antenna according to the present invention is applied.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in this specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and do not represent all the technical ideas of the present invention. Therefore, It is to be understood that equivalents and modifications are possible.

1 is a view schematically showing the configuration of a hybrid coil antenna according to the present invention, Figure 2 is a perspective view showing an embodiment of a hybrid coil antenna according to the present invention, Figure 3 is an exploded perspective view of FIG.

Referring to FIG. 1, the hybrid coil antenna 100 according to the present invention has a spiral coil part 110 formed in a spiral shape having a predetermined diameter on an imaginary plane P formed perpendicular to a direction of a central axis C. And a helical coil unit 120 formed in a helical shape having a predetermined height along the central axis C direction.

The spiral coil unit 110 and the helical coil unit 120 are rotated in the same rotation direction S so that the hybrid coil antenna 100 may have the same current direction throughout, and further using the same coil length. The spiral coil unit 110 and the helical coil unit 120 are continuously connected to each other by using one coil to operate at a low resonance frequency.

In addition, the diameter of the helical coil unit 120 of the hybrid coil antenna 100 is preferably formed to have the same diameter as the diameter of the spiral coil unit 110. This is to match the direction of the magnetic field generated in the spiral coil unit 110 and the helical coil unit 120, and to have a structurally stable form.

The hybrid coil antenna 100 according to the present invention may be implemented in the form as shown in FIGS. 2 and 3. That is, the spiral coil portion 110 is formed in the form of a circular plate, the helical coil portion 120 is formed in a cylindrical shape having a diameter corresponding to the diameter of the spiral coil portion 110 to be continuously connected to each other Can be configured.

Meanwhile, although the spiral coil part 110 and the helical coil part 120 are illustrated as being circular in FIGS. 1 to 3, the present invention is not limited thereto, and the elliptical, rectangular, hexagonal, or octagonal shapes may be used. It may be formed. In addition, the spiral coil unit 110 and the helical coil unit 120 may be composed of at least one. In this case, it is preferable that the spiral coil unit 110 and the helical coil unit 120 are alternately arranged.

As described above, the hybrid coil antenna 100 according to the present invention has a problem of a coil antenna, which is conventionally implemented in a single structure having a spiral shape or a helical shape, that is, a problem in which the diameter becomes very large when implemented in a single structure having a spiral shape and a helical shape. It is proposed to solve the problem that the height becomes very large when implemented in a single structure of, spiral coil portion 110 having a spiral shape which is advantageous to reduce the height, and a helical nose having a helical shape which is advantageous to reduce the diameter By configuring a portion 120 is a composite structure, it is configured to reduce the size of the antenna as a whole.

On the other hand, the hybrid coil antenna 100 according to the present invention can be applied to a wireless power transmission and reception system for transmitting and receiving wireless power using a magnetic resonance method. That is, a magnetic resonance wireless power transmission and reception system requires a coil antenna driven at a resonant frequency of a relatively low frequency band, such as a band of several tens of MHz, if the hybrid coil antenna 100 according to the present invention is applied to a wireless power transmission and reception system Can be miniaturized.

4 is a diagram schematically illustrating a wireless power transmission and reception system to which a hybrid coil antenna according to the present invention is applied.

Referring to FIG. 4, the wireless power transmission / reception system according to the present invention generates a wireless power signal having a resonant frequency of a specific band when commercial power is supplied, and generates the wireless power signal through a power transmission antenna 100a. Wireless power transmitter 200 for transmitting to the outside in a resonance method, and a wireless power receiver 300 for receiving the wireless power signal through the power receiving antenna (100b) in a magnetic resonance method to convert the power to use power; It is configured by.

The other components except for the power transmitting antenna 100a and the power receiving antenna 100b in the above-described components are typical components applied to a wireless power transmission / reception system well known in the art. The description will be omitted.

The power transmitting antenna 100a and the power receiving antenna 100b are configured in such a manner that only the correlation between the transmitting side and the receiving side of the wireless power signal may be different and may be resonated at the same resonance frequency.

That is, the power transmission antenna 100a and the power reception antenna 100b commonly include a resonant coil for transmitting or receiving the wireless power signal by a magnetic resonance method, and the hybrid coil according to the present invention is included in the resonant coil. It is configured by applying the coil antenna 100.

In this case, the power transmission antenna 100a and the power reception antenna 100b further include a power supply loop 130 which supplies or is supplied with the wireless power signal to the resonant coil 100 by magnetic induction. The wireless power signal generated by the transmission device 200 is supplied to the resonant coil 100 of the power transmission antenna 100a or the wireless power signal received from the resonant coil 100 of the power reception antenna 100b. Is supplied to the wireless power receiver 300.

On the other hand, in the wireless power transmission and reception system according to the present invention at least a space for relaying the wireless power signal transmitted from the wireless power transmitter 200 in the space between the wireless power transmitter 200 and the wireless power receiver 300. One or more relay coils 100c may be further provided.

The relay coil 100c includes a resonant coil resonating at the same resonant frequency as the power transmitting antenna 100a and the power receiving antenna 100b, and the hybrid coil antenna 100 according to the present invention is used for the resonant coil. It is configured by applying. That is, the relay coil 100c resonates with the power transmitting antenna 100a or the power receiving antenna 100b, and also resonates with other adjacent relay coils 100c again, thereby providing wireless The transmission distance of the power signal can be further extended.

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 to be limited to the details thereof and that various changes and modifications will be apparent to those skilled in the art. And various modifications and variations are possible within the scope of the appended claims.

100: hybrid coil antenna
110: spiral coil portion 120: helical coil portion

Claims (16)

A spiral coil part formed in a spiral shape having a predetermined diameter on an imaginary plane formed perpendicular to the central axis direction; And
And a helical coil part formed in a helical shape having a predetermined height along the central axis direction.
And the spiral coil part and the helical coil part are rotated in the same rotational direction and connected to each other continuously. The method of claim 1,
The diameter of the helical coil portion is a hybrid coil antenna, characterized in that the same as the diameter of the spiral coil portion. The method of claim 1,
The spiral coil portion and the helical coil portion is a hybrid coil antenna, characterized in that formed in a circular, oval, square, hexagon or octagon. The method of claim 1,
The spiral coil and the helical coil is composed of at least one, hybrid coil antenna, characterized in that formed repeatedly arranged alternately. A wireless power transmitter generating a wireless power signal having a resonance frequency of a specific band when commercial power is supplied, and transmitting the generated wireless power signal to the outside in a magnetic resonance manner through a power transmission antenna; And
And a wireless power receiver configured to receive the wireless power signal through a power receiving antenna in a magnetic resonance manner and convert the wireless power signal into used power.
The power transmission antenna and power reception antenna,
Resonant coil for transmitting or receiving the wireless power signal by a magnetic resonance method,
The resonant coil is,
Spiral coil portion formed in a spiral shape having a predetermined diameter on a virtual plane formed perpendicular to the central axis direction, and a helical coil portion formed in a helical shape having a predetermined height along the central axis direction, the spiral coil portion And the helical coil unit are rotated in the same rotation direction and are connected to each other continuously. The method of claim 5,
The resonant coil is,
And a diameter of the helical coil part is the same as that of the spiral coil part. The method of claim 5,
The resonant coil is,
The spiral coil unit and the helical coil unit is a wireless power transmission and reception system, characterized in that formed in a circular, oval, square, hexagon or octagon. The method of claim 5,
The resonant coil is,
The spiral coil unit and the helical coil unit is composed of at least one, wireless power transmission and reception system, characterized in that formed repeatedly arranged alternately. The method of claim 5,
And a resonant coil of the power transmitting antenna and a resonant coil of the power receiving antenna are resonated at the same resonant frequency. The method of claim 5,
The power transmission antenna and power reception antenna,
And a feeding loop for supplying or receiving the wireless power signal to the resonant coil by magnetic induction. The method of claim 5,
And at least one relay coil for relaying the wireless power signal in a space between the wireless power transmitter and the wireless power receiver. 12. The method of claim 11,
The relay coil,
Spiral coil portion formed in a spiral shape having a predetermined diameter on a virtual plane formed perpendicular to the central axis direction, and a helical coil portion formed in a helical shape having a predetermined height along the central axis direction, the spiral coil portion And the helical coil unit are rotated in the same rotation direction and are connected to each other continuously. The method of claim 12,
The relay coil,
And a diameter of the helical coil part is the same as that of the spiral coil part. The method of claim 12,
The relay coil,
The spiral coil unit and the helical coil unit is a wireless power transmission and reception system, characterized in that formed in a circular, oval, square, hexagon or octagon. The method of claim 12,
The relay coil,
The spiral coil unit and the helical coil unit is composed of at least one, wireless power transmission and reception system, characterized in that formed repeatedly arranged alternately. 12. The method of claim 11,
The relay coil,
Wireless power transmission and reception system, characterized in that the resonant frequency at the same resonance frequency as the power transmission antenna and the power receiving antenna.
KR1020120034453A 2012-04-03 2012-04-03 Hybrid coil antenna and system for wireless power transmission using the same KR20130112226A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015167099A1 (en) * 2014-04-30 2015-11-05 한국전기연구원 Wireless power transmission device, wireless power reception device, and coil structure
CN105706334A (en) * 2014-04-30 2016-06-22 韩国电气研究院 Apparatus for wireless power transfer, apparatus for wireless power reception and coil structure
KR20160105183A (en) * 2015-02-27 2016-09-06 주식회사 켐트로닉스 Modified Helix Antenna for Magnetic Resonance Wireless Power Transfer
CN107112107A (en) * 2015-01-14 2017-08-29 高通股份有限公司 Asymmetric layer stack coil and/or beveling ferrite in wireless power transmission application

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015167099A1 (en) * 2014-04-30 2015-11-05 한국전기연구원 Wireless power transmission device, wireless power reception device, and coil structure
CN105706334A (en) * 2014-04-30 2016-06-22 韩国电气研究院 Apparatus for wireless power transfer, apparatus for wireless power reception and coil structure
CN105706334B (en) * 2014-04-30 2019-01-04 韩国电气研究院 Wireless power transmission apparatus, wireless power reception device and loop construction
US10366828B2 (en) 2014-04-30 2019-07-30 Korea Electrotechnology Research Institute Apparatus for wireless power transfer, apparatus for wireless power reception and coil structure
CN107112107A (en) * 2015-01-14 2017-08-29 高通股份有限公司 Asymmetric layer stack coil and/or beveling ferrite in wireless power transmission application
KR20160105183A (en) * 2015-02-27 2016-09-06 주식회사 켐트로닉스 Modified Helix Antenna for Magnetic Resonance Wireless Power Transfer

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