KR20180131114A - Wireless power transmission system using magnetic resonance and charging method - Google Patents

Wireless power transmission system using magnetic resonance and charging method Download PDF

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Publication number
KR20180131114A
KR20180131114A KR1020170067712A KR20170067712A KR20180131114A KR 20180131114 A KR20180131114 A KR 20180131114A KR 1020170067712 A KR1020170067712 A KR 1020170067712A KR 20170067712 A KR20170067712 A KR 20170067712A KR 20180131114 A KR20180131114 A KR 20180131114A
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South Korea
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wireless
power transmission
wireless power
charging
magnetic resonance
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KR1020170067712A
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Korean (ko)
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전동준
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전동준
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/60—Circuit arrangements or systems for wireless supply or distribution of electric power responsive to the presence of foreign objects, e.g. detection of living beings
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/80—Circuit arrangements or systems for wireless supply or distribution of electric power involving the exchange of data, concerning supply or distribution of electric power, between transmitting devices and receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H02J7/0021—
    • H02J7/025—
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/70—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes
    • H04B5/79—Near-field transmission systems, e.g. inductive or capacitive transmission systems specially adapted for specific purposes for data transfer in combination with power transfer
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Signal Processing (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

The present invention relates to a long-distance wireless power transmission system using magnetic resonance and a charging method thereof which can charge without limitations on a distance in a building. Using resonance phenomenon between transmitting and receiving antennas, a frequency of several MHz to tens of MHz band is used to create magnetic resonance to transport power. Energy can be transferred at a longer distance than electromagnetic induction and higher efficiency than electromagnetic radiation. Also, the wireless charging method uses magnetic resonance of coils between transmitters and receivers to provide customers with convenience by hardware having the weight of 300 grams or lighter and the size of 10x15x2 cm. The wireless power transmission system is harmless to humans in comparison to electromagnetic induction with a short power transmission distance or electromagnetic waves having a long transmission distance and affecting humans, and has a relatively satisfactory power transmission distance in comparison to electromagnetic induction.

Description

자기공명을 이용한 무선 전력 전송 시스템 및 충전 방법{Wireless power transmission system using magnetic resonance and charging method}TECHNICAL FIELD [0001] The present invention relates to a wireless power transmission system and a charging method using magnetic resonance,

본 발명은 무선 전력 전송 시스템에 관한 것으로서, 더 구체적으로는 배터리 [0001] 정보를 기반으로 충전이 필요한 기기를 선택하여 충전할 수 있는 자기공진유도 방식을 이용한 멀티노드 무선 전력 전송 시스템 및 그 충전 방법에 관한 것이다.[0001] The present invention relates to a wireless power transmission system, and more particularly, to a multi-node wireless power transmission system using a self-resonance induction method capable of selecting and charging devices requiring charging based on battery information, .

스마트 폰과 태블릿, 각종 웨어러블 기기가 출시되고 있지만 이러한 기기들 대부분 유선 접지를 통한 충전방식을 가지고 있다. 최근에는 전동칫솔이나 면도기 등이 전자기 유도의 원리로 충전되고, 스마트 폰도 무선충전을 이용한 제품들이 출시되고 있다.Smartphones, tablets, and wearable devices are on the market, but most of these devices have a charging method through wire grounding. In recent years, electric toothbrushes and razors have been charged with the principle of electromagnetic induction, and products using wireless charging have also been released.

그러나 자기 유도 방식은 전력 전송 효율이 90% 이상으로 매우 높다는 장점이 있지만, 수cm 이상 떨어지거나 송신 코일과 수신 코일의 중심이 정확히 일치하지 않으면 전력이 거의 전송되지 않을 정도로 효율이 급격히 저하된다는 문제점이 있다. 전자기파 방식은 수십km이상 멀리 떨어진 곳에 수십kW 이상의 높은 전력을 송신할 수 있지만, 전력의 상당 부분이 전송 도중에 사방으로 흩어져 버리기 때문에 효율이 매우 낮을 뿐만 아니라 인체에 치명적으로 해롭다는 단점도 있다.However, the magnetic induction method has a merit that the power transmission efficiency is very high at 90% or more. However, if the distance is more than several centimeters or the center of the transmitting coil and the receiving coil do not exactly coincide with each other, have. Although the electromagnetic wave system can transmit a high power of several tens of kW or more away from a distance of several tens of kilometers or more, a significant portion of the electric power is scattered in four directions during transmission, which is not only very low efficiency but also has a disadvantage that it is fatal to the human body.

자기 유도 방식의 짧은 전송 거리와 전자기파 방식의 효율성 및 인체 유해성 문제를 극복한 새로운 무선전력 전송방식이 자기 공명방식이다.The magnetic resonance method is a new wireless power transmission method that overcomes the problem of short transmission distance of the magnetic induction method, efficiency of the electromagnetic wave method and human body harmfulness.

자기공명 방식은 송신부 코일에서 특정 공진주파수로 진동하는 자기장을 만들어 같은 공진주파수를 가진 수신부 코일에 전기에너지를 전달하는 방식으로 충전이 이뤄진다.In the magnetic resonance method, the transmission coil generates a magnetic field that oscillates at a specific resonance frequency, and the electric energy is transmitted to the receiver coil having the same resonance frequency.

일반 가옥 또는 사무실, 관공서, 편의시설 등 공공장소 내에서 하나의 에너지 존을 구성해 놓고 근처의 다양한 전기기기들을 충전하거나 전원을 공급하는 것이 가능해 진다는 것이다. It is possible to construct a single energy zone in a public place such as a general house or an office, a public office, a convenience facility, and to charge or supply a variety of nearby electric devices.

전기자동차의 경우에도 자기공명 무선충전 기술을 통해 주차장 근처에 주차한 다수한 전기자동차에 자동으로 충전이 진행되는 것도 가능해 충전소 자리를 별도로 마련하거나, 타 차량 충전 시 대기해야 하는 시간을 줄여줄 수 있다.In the case of an electric vehicle, it is also possible to automatically charge a plurality of electric vehicles parked near a parking lot through a magnetic resonance wireless charging technology, thereby reducing the time required to prepare a charging station or to wait for charging other vehicles .

국내 전자통신연구원에서도 2015년 60와트급 자기 공명 방식을 이용해 1M 거리에서도 무선충전을 할 수 있는 원천기술을 개발했다고 밝힌 바 있다. 이 기술이 상용화될 경우 우리가 사용하고 있는 ”와이파이 존”과 같은 “에너지 존”의 형성이 가능하다는 것이다.The Korea Electronics and Telecommunications Research Institute (KEITI) has also announced that it has developed a source technology capable of wireless charging at a distance of 1M using a 60-watt magnetic resonance method in 2015. When this technology is commercialized, it is possible to form an "energy zone" like our "WiFi zone".

그러나 거리에 따라 떨어지는 충전 효율, 전자파의 영향, 상대적으로 긴 충전시간이 비효율적이다.However, the charging efficiency, the influence of electromagnetic waves falling on the distance, and the relatively long charging time are inefficient.

본 발명은 상술한 바와 같은 기술적 배경에서 안출된 것으로서, 기존의 자기유도 방식이나 유선충전 방식에서 생기는 행동반경의 제약을 없애는 자기공명 방식의 무선 전력 전송 시스템 및 그 충전 방법을 제공하는 것을 그 과제로 한다.SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless power transmission system of a magnetic resonance type and a charging method thereof that eliminate the restriction of a radius of action caused by a conventional magnetic induction system or a wired charging system do.

이와 같은 과제를 해결하기 위하여 본 발명에서는 자기공명 방식의 무선 전력 전송 시스템 및 그 충전 방법을 이용하여 거리의 제약 없이 충전한다.In order to solve such a problem, the present invention uses a magnetic resonance type wireless power transmission system and its charging method to charge without disturbing the distance.

상기 무선 충전기기는, 송수신 안테나 간의 공명현상을 이용하는 방식으로, 수 MHz에서 수십 MHz 대역의 주파수를 사용하여 자기적 공명을 이루어 전력을 전송하는 기술. 전자기유도보다 먼 거리에서 전자기방사 보다는 더 높은 효율로 에너지를 전달가능하다.The wireless charger uses a resonance phenomenon between transmitting and receiving antennas to transmit power in magnetic resonance using a frequency of several MHz to several tens MHz. Electromagnetic induction It is possible to deliver energy at a higher efficiency than electromagnetic radiation at a greater distance.

본 발명에 따라, 자기유도방식을 적용한 무선 전력전송장치가 특정 공진 주파수를 가진 코일을 감지할 경우, 이를 사용자에게 알려 기기의 충전이 가능하도록 함으로서 기존의 유선충전방식의 거리에 의한 제약이 해소되어 사용자의 편리성을 증진한다.According to the present invention, when a wireless power transmission apparatus using a magnetic induction method detects a coil having a specific resonance frequency, it is possible to charge a device by informing a user of the coil, thereby eliminating the restriction due to the distance of the conventional wire charging method Thereby enhancing the convenience of the user.

또한, 장애물에 의한 충전 방해 시 이를 사용자에게 알리고, 장애물 제거 시 재 연결하여 충전의 효율성을 높인다.In addition, it informs the user when the charging obstruction due to the obstacle is obstructed, and when the obstacle is removed, the charging efficiency is improved by reconnection.

도 1은 본 발명의 실시 예에 따른 자기공명 방식을 이용한 장거리 무선 에너지 전송 시스템의 전체 구성을 개략적으로 나타낸 블록도이다.
도 2는 본 발명의 실시 예에 따른 자기공명 방식을 이용한 장거리 무선 에너지 전송 시스템의 무선 전력공급 장치와 무선 충전기기의 구성을 나타내는 블록도이다.
도 3은 본 발명의 실시 예에 따른 자기공명 방식을 이용한 장거리 무선 에너지 전송 시스템의 충전 방법을 나타내는 흐름도이다.1 is a block diagram schematically showing the overall configuration of a long-distance wireless energy transmission system using a magnetic resonance method according to an embodiment of the present invention.
2 is a block diagram illustrating a configuration of a wireless power supply device and a wireless charging device of a long-distance wireless energy transmission system using a magnetic resonance method according to an embodiment of the present invention.
3 is a flowchart illustrating a charging method of a long-distance wireless energy transmission system using a magnetic resonance method according to an embodiment of the present invention.

도 1에 나타난 바와 같이, 본 발명의 실시 예에 따른 자기공명 방식을 이용한 다중 충전 시스템은 자기공명 방식을 통해 부선으로 에너지를 공급하는 무선 공급 장치(100)와 부선 전력 공급 장치(100)와 일정 거리만큼 떨어진 곳에 위치하며 무선 전력공급 장치(100)로부터 무선으로 전력을 공급받는 다수의 무선 충전기기를 포함하여 구성된다.As shown in FIG. 1, a multiple charging system using a magnetic resonance method according to an embodiment of the present invention includes a wireless power supply device 100 for supplying energy to a barge through a magnetic resonance method, a barge power supply device 100, And a plurality of wireless chargers located at a distance from the wireless power supply apparatus 100 and supplied with power wirelessly from the wireless power supply apparatus 100.

자기공명 방식은 송신 안테나와 수신 안테나 사이의 공간에 공명을 이용한 무선 전송 효율은 극대화 시키는 방법이다. 이를 위해서는 무선 전력공급 장치(100)와 무선 충전기기(200) 사이의 공명 주파수를 맞추어 공명 채널을 형성하고 이를 통하여 무선 전력을 송신한다.The magnetic resonance method maximizes the radio transmission efficiency using the resonance in the space between the transmitting antenna and the receiving antenna. For this purpose, a resonance frequency is established between the wireless power supply device 100 and the wireless charging device 200 to form a resonance channel, and wireless power is transmitted through the resonance channel.

무선 전련공급 장치(100)는 부착과 설치함으로 구현될 수 있으며, 구현될 경우 실내에서는 천장이나 탁자 가구등의 부착하여 사용할 수 있고, 실외에서는 전철이나 버스 정류장과 주차장 등의 설치를 통하여 무선 충전을 가능하게 한다.The wireless communication device 100 can be implemented by attaching and installing the wireless communication device 100. When the wireless communication device 100 is installed, the wireless communication device 100 can be used by attaching a ceiling or table furniture in the room. .

무선 충전기기는 베터리가 장착되어 있는 모바일 단말기, 노트북 컴퓨터, 전기 자동차 등이 있다.The wireless charger includes a mobile terminal equipped with a battery, a notebook computer, and an electric vehicle.

도 2에 나타낸 것과 같이, 본 발명의 실시 예에 따른 자기공명유도 방식을 이용한 다중 무선 에너지 전송 시스템의 무선 전력공급 장치(100)는, 외부의 전력 공급원으로부터 전력을 공급받아 무선 전력공급 장치(100)와 무선 충전기기(200) 간의 공명 주파수 대역을 갖는 AC 전력으로 변환하는 전력 변환부(120), 자기장 통신 프로토콜을 이용하여 무선 충전기기(200)와의 자기장 통신을 수행하도록 하는 자기장 통신 모뎀(130), 전력 변환부(140)로부터의 AC 전력과 자기장 통신 모뎀(120)으로부터의 데이터를 자기공명유도 방식을 이용하여 무선 충전기기(200)로 송신하는 송신 안테나(110), 전력 변환부(140) 및 자기장 통신 모뎀(120)을 비롯한 무선 전력 공급장치(100)의 구성요소들을 제어하는 제어부(130)를 포함한다.2, the wireless power supply apparatus 100 of the multi-wireless energy transmission system using the magnetic resonance induction method according to the embodiment of the present invention receives power from an external power supply source and receives power from the wireless power supply apparatus 100 And a magnetic field communication modem 130 for performing magnetic field communication with the wireless charging device 200 using a magnetic field communication protocol, A transmission antenna 110 for transmitting AC power from the power conversion unit 140 and data from the magnetic field communication modem 120 to the wireless charging device 200 using a magnetic resonance induction method; And a controller 130 for controlling the components of the wireless power supply 100, including the magnetic field communication modem 120.

도 3은 본 발명의 실시한 것에 따른 자기공명 방식을 이용한 다중 무선 에너지 전송 시스템에서 효율적으로 각 무선 충전기기를 충전하는 흐름도이다.FIG. 3 is a flowchart for efficiently charging each wireless charger in the multi-radio energy transmission system using the magnetic resonance method according to the present invention.

도 3에서 보는 것과 같이 처음 새로운 기기(S300)가 무선충전기로 충전이 될 때 충전이 필요한 한지 여부(S310)를 확인하고 충전이 되었으면 다음 흐름으로 진행된다. 다음 흐름인 배터리 충전(S320)이 진행되고 배터리 충전이 완료되면(S330)완료알림을 띄우게 되고(S330) 완료 되지 않았으면 다시 배터리 충전이 진행되는 방식으로 한다.As shown in FIG. 3, when the new device (S300) is charged with the wireless charger, it is checked whether charging is required (S310). When the battery charging (S320) is completed and the battery charging is completed (S330), the completion notification is displayed (S330). If the battery charging is not completed, the battery charging is performed again.

100 : 무선 전력전송 장치
110 : 송신 안테나
120 : 전력 변환부
130 : 자기장 통신 모뎀
140 : 제어부
200 : 무선 충전기기
210 : 수신 안테나
220 : 전력 관리부
230 : 자기장 통신 모뎀
240 : 제어부
250 : 부하100: Wireless power transmission device
110: transmitting antenna
120: Power conversion section
130: magnetic field communication modem
140:
200: Wireless charging device
210: receiving antenna
220:
230: magnetic field communication modem
240:
250: Load

Claims (5)

무선 전력송신 장치와 상기 무선 전력송신 장치와 이격되어 있으며 송수신 안테나 간의 공명현상을 이용하여 상기 무선 전력송신 장치와 통신 할 수 있는 다수의 무선 충전기기를 포함하는 장거리 무선 전력 전송 시스템으로서, 상기 무선 전력송신 장치는 상기 무선 충전기기의 배터리 상태 정보를 수신하여, 상기 무선 충전기기 중 배터리 잔량을 확인하고,

상기 무선 충전기기 끼리의 내부 회로를 제어하여 무선 전력송신 장치로부터 송신되는 무선 전력이 다른 상기 무선 충전기기의 부하로 전달되지 않도록 하되,

상기 무선 충전기기는,
상기 무선 전력송신 장치로부터 송신되는 무선 전력을 수신하는 수신 안테나와, 상기 수신 안테나와 연결되어 있으며, 상기 무선 충전기기 사이의 송수신 안테나의간의 공명현상을 이용하여, 상기 무선 충전기기의 충전/충전완료 중 하나의 상태로 설정되도록 제어하는 장거리 무선 전력 전송 시스템.
1. A long-range wireless power transmission system comprising a wireless power transmission apparatus and a plurality of wireless rechargers spaced from the wireless power transmission apparatus and capable of communicating with the wireless power transmission apparatus using a resonance phenomenon between transmitting and receiving antennas, The device receives the battery status information of the wireless charging device, checks the remaining battery charge of the wireless charging device,

Controlling the internal circuits of the wireless charging devices so that the wireless power transmitted from the wireless power transmission device is not transmitted to the loads of the other wireless charging devices,

The wireless charger includes:
A receiving antenna connected to the receiving antenna for receiving wireless power transmitted from the wireless power transmission device and for charging / charging the wireless charging device using the resonance phenomenon between the transmitting and receiving antennas between the wireless charging devices; To be set to one of the states.
상기 무선 전력송신 장치는 범위 내에서 자동으로 상기 무선 충전기기를 감지, 상기 무선 충전기기는 반대로 전력공급 장치인 상기 무선 전력송신 장치를 감지하는 장거리 무선 전력 전송 시스템.Wherein the wireless power transmission device automatically senses the wireless charging device within a range and the wireless charging device senses the wireless power transmission device that is the opposite power supply device. 제 1항에 있어서, 상기 무선 전력송신 장치는,
상기 무선 충전기기로 미리 정한 설정량의 무선 전력을 송신한 경우 상기 무선 충전기기로부터 상기 배터리 상태 정보를 다시 수신하여 충전 신호를 단절하는 장거리 무선 전력 전송 시스템.2. The wireless power transmission apparatus according to claim 1,
Wherein the wireless charging device receives the battery state information from the wireless charging device when the predetermined amount of wireless power is transmitted to the wireless charging device and disconnects the charging signal. 제1항에 있어서, 상기 무선 전력송신 장치는,
장애물에 가려 충전이 중단된 경우 잠시 상기 무선 전력송신 장치의 연결을 끊었다가 다시 연결하여 충전을 재개하는 장거리 무선 전력 전송 시스템.2. The wireless power transmission apparatus according to claim 1,
Wherein the charging is resumed by disconnecting and reconnecting the wireless power transmission device for a while when charging is stopped by covering the obstacle. 제1항에 있어서, 상기 무선 전력송신 장치는,
10 ~ 20대의 상기 무선 충전기기를 송수신 안테나 간의 공명 현상을 이용하여 동시에 충전이 가능하게 하는 장거리 무선 전력 전송 시스템.2. The wireless power transmission apparatus according to claim 1,
A long distance wireless power transmission system which enables charging of 10 to 20 wireless chargers simultaneously using resonance phenomenon between transmitting and receiving antennas.
KR1020170067712A 2017-05-31 2017-05-31 Wireless power transmission system using magnetic resonance and charging method KR20180131114A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210047424A (en) 2019-10-21 2021-04-30 충북대학교 산학협력단 System of wireless power transfer system with human body protection function

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20210047424A (en) 2019-10-21 2021-04-30 충북대학교 산학협력단 System of wireless power transfer system with human body protection function

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