WO2018194247A1 - High-power and high-voltage wireless power transmission receiver - Google Patents

High-power and high-voltage wireless power transmission receiver Download PDF

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Publication number
WO2018194247A1
WO2018194247A1 PCT/KR2018/001592 KR2018001592W WO2018194247A1 WO 2018194247 A1 WO2018194247 A1 WO 2018194247A1 KR 2018001592 W KR2018001592 W KR 2018001592W WO 2018194247 A1 WO2018194247 A1 WO 2018194247A1
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Prior art keywords
coil
voltage
load
resonance
receiver
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PCT/KR2018/001592
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French (fr)
Korean (ko)
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황상훈
최창욱
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주식회사 파워리퍼블릭
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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
    • H02J50/005—Mechanical details of housing or structure aiming to accommodate the power transfer means, e.g. mechanical integration of coils, antennas or transducers into emitting 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
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B5/00—Near-field transmission systems, e.g. inductive or capacitive transmission systems
    • H04B5/20—Near-field transmission systems, e.g. inductive or capacitive transmission systems characterised by the transmission technique; characterised by the transmission medium
    • H04B5/24—Inductive coupling
    • H04B5/26—Inductive coupling using coils
    • H04B5/263—Multiple coils at either side
    • 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

Definitions

  • the present invention relates to a high power high voltage wireless power transmission receiver. More specifically, the present invention relates to a receiver that enables the high power high voltage wireless power transmission by branching the coil of the receiver.
  • the prior art produces a large output at one transmitter to produce the desired power value or voltage level at the receiver.
  • the basic configuration of the receiver consists of a combination of coil and capacitor and buck-converting the voltage generated through bridge rectification or other methods of rectification.
  • the basic principle is to generate the desired voltage and current by buck converting (or step-down), and the voltage may be controlled by using a feedback circuit or a zener diode.
  • DC-DC converting or step-down integrated circuits are developed based on integrated circuits (ICs), the level at which the IC directly receives and controls the voltage is limited.
  • the maximum input voltage of the current DC-DC converter is about 90V.
  • the maximum input voltage of the current DC-DC converter is about 90V.
  • Korean Patent Laid-Open Publication No. 10-2016-0057278 discloses a first and a second coil, one of which surrounds another, a shielding member spaced apart along a circumference of one of two coils, and Disclosed is a technique of using one coil or a second coil or two coils simultaneously.
  • the patent only mentions the number and arrangement of the coils and does not disclose any structure or function related to the circuitry of the receiver.
  • Korean Patent Laid-Open Publication No. 10-2013-0116230 discloses two resonance coils and two induction coils in a receiver, connecting an induction coil to a rectifier, and maintaining or interrupting power delivered to a load by a battery management element.
  • a wireless power transmission system is disclosed.
  • the use of two coils in this patent is due to the self-resonant wireless power transmission, and in the case of magnetic induction, the use of a plurality of coils is optional since no resonant coil is required.
  • the configuration is limited in that it is not different from the existing wireless power system.
  • Korean Patent Laid-Open Publication No. 10-2015-0134107 discloses a matter in which a switch element is connected to a capacitor of a receiver so that the switch controller opens the switch at a time when the power is stored in the inductor of the reception resonator to the maximum to transfer power to the load. have.
  • this patent is limited in supplying high voltage power to the load and controlling power by controlling power transfer by switching on / off operation and making no structural changes to the coil of the receiver.
  • Korean Patent Laid-Open Publication No. 10-2013-044647 relates to a receiving power converter for a resonant wireless charging system, comprising: connecting a switch to an LC circuit of a receiver and refluxing an alternating current type power received from a wireless power receiver by a switching operation.
  • a method of forming a free-wheeling path, receiving an output signal of a power converter, detecting a level, and controlling a switching operation of the switching unit according to the detected output level are disclosed.
  • this patent also has a limitation in supplying high voltage power to the load and controlling power by controlling power transfer by switching on / off operation and making no structural changes to the coil of the receiver.
  • An object of the present invention is to provide a high-power high-voltage wireless power transmission receiver that can respond to the maximum resonant frequency in a high power supply and supply situation, and can supply a voltage below a maximum allowable voltage smaller than a theoretical maximum voltage.
  • the present invention provides a wireless power transmission receiver, comprising: a resonance combination unit formed by connecting a coil and a capacitor for resonant coupling with a transmitter in parallel; A control circuit connected in parallel to the coil of the resonance combination unit and including a switch and a buffer capacitor; A detector for detecting a load voltage output from the resonance combination unit to a load; And a comparison judging unit which compares the load voltage detected by the detection unit with a predetermined set value, wherein the predetermined set value is a maximum voltage set value, and when the detected load voltage reaches the maximum voltage set value, the switch is operated.
  • a receiver characterized in that the resonance combination is mismatched so that the resonance combination becomes a different frequency from the matching resonance frequency.
  • the predetermined set value further includes a minimum voltage set value, and when the detected load voltage reaches the minimum voltage set value, the switch is turned off to match the resonance frequency of the resonant combination part with the resonance frequency of the transmitter.
  • the coil of the resonance combination unit may include a first coil and a second coil, and the first coil and the second coil may be connected by a bridge part connecting the two coils.
  • the control circuit may be connected to any one or more of the first coil or the second coil.
  • the bridge portion may be connected to the rectifying portion.
  • the first coil and the second coil are connected to the bridge part by a link or a tab connecting the two coils.
  • the present invention provides a method for controlling a wireless power transmission receiver, comprising: (a) a load voltage supplied to a load from a resonant combination part consisting of a coil and a capacitor connected in parallel to resonantly couple with a transmitter to supply a voltage to a load of the receiver; Detecting by the detection unit, and determining whether the comparison determination unit is greater than or equal to a predetermined minimum voltage set value; (b) if step (a) is positive, supplying the load voltage to the load; (c) detecting the load voltage supplied to the load by the detection unit to determine whether a predetermined maximum voltage set value has been reached by the comparison determination unit; And (d) if step (c) is positive, mismatching the resonant frequency of the resonator combination to be a different frequency from the resonant frequency of the transmitter, wherein step (d) is parallel to the resonant combination.
  • a method of controlling a wireless power transmission receiver characterized in that is performed when the switch of a control circuit,
  • the present invention has the effect of stably controlling the output voltage below the maximum allowable voltage smaller than the theoretical maximum voltage when it is difficult to find and control the resonant frequency that achieves the maximum voltage and the maximum efficiency. .
  • the present invention is simple and economical because it can control the voltage output to the load by branching the coil of the receiver to the bridge and adding a control circuit of a simple configuration.
  • FIG. 1 is a perspective view showing a coil according to an embodiment of the present invention.
  • FIG. 2 is a perspective view showing a coil according to another embodiment of the present invention.
  • FIG. 3 is a circuit diagram illustrating that the coil of FIG. 2 is connected to a rectifying unit.
  • FIG. 4 is a partial circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
  • FIG. 5 is a circuit diagram of a switch according to an embodiment of the present invention.
  • FIG. 6 is a graph illustrating a load output control method according to an embodiment of the present invention.
  • FIG. 7 is a circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
  • FIG. 8 is a flow chart showing a control step of a high power high voltage wireless power transmission method according to an embodiment of the present invention.
  • FIG. 1 is a perspective view showing a coil according to an embodiment of the present invention.
  • FIG. 2 is a perspective view showing a coil according to another embodiment of the present invention.
  • FIG. 3 is a circuit diagram illustrating that the coil of FIG. 2 is connected to a rectifying unit.
  • FIG. 4 is a partial circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
  • FIG. 5 is a circuit diagram of a switch according to an embodiment of the present invention.
  • FIG. 6 is a graph illustrating a load output control method according to an embodiment of the present invention.
  • FIG. 7 is a circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
  • FIG. 8 is a flow chart showing a control step of a high power high voltage wireless power transmission method according to an embodiment of the present invention.

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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 provides a wireless power transmission receiver capable of stably controlling an output voltage below the maximum allowable voltage, which is lower than the theoretical maximum voltage, when finding an accurate resonance frequency for achieving the maximum voltage and the maximum efficiency and supplying and controlling power according to the found accurate resonance frequency is difficult.

Description

고전력 고전압의 무선전력전송 수신기High power high voltage wireless power transmission receiver
본 발명은 고전력 고전압의 무선전력전송 수신기에 관한 것이다. 더욱, 구체적으로 본 발명은 수신기의 코일을 분기하여 고전력 고전압 무선전력전송을 가능하게 한 수신기에 관한 것이다.The present invention relates to a high power high voltage wireless power transmission receiver. More specifically, the present invention relates to a receiver that enables the high power high voltage wireless power transmission by branching the coil of the receiver.
현재의 자기 공진, 자기 유도의 형식 및 RF 방식, 그리고 초음파 및 광학의 사용법에 의한 무선충전 및 무선전력 전송 방법은 수 내지 수십 와트의 송수신이 가능한 구조로 제작되고 있다. 또한 한 개의 송신기에 다수의 수신기(부하)를 사용하고자 할 때 종래의 기술들은 비교적 비슷한 전압 및 전류 레벨을 사용하는 수신기를 제작하여 사용한다.Current magnetic resonance, magnetic induction type and RF method, and the wireless charging and wireless power transmission method by using the ultrasonic and optical are manufactured in a structure capable of transmitting and receiving several to several tens of watts. In addition, when a plurality of receivers (loads) are to be used in one transmitter, the conventional techniques make and use receivers using relatively similar voltage and current levels.
예를 들어 현재 무선전력전송 기술들을 살펴 보면, 스마트폰을 충전하기 위해서는 5V(고속충전의 경우 12V) 전압만 보유 하고 있으면 된다. 또한 비교적 쉽게 다중 사용을 전제로 하고 다수의 부하로 표현되어 구현되는 것은 태블릿 PC 로서, 이 역시 5V(고속충전 경우 12V) 전압 레벨만 보유 하고 있으면 배터리 충전하는데 무리가 없다. For example, if you look at the current wireless power transmission technology, you need only 5V (12V for fast charging) to charge the smartphone. In addition, it is a tablet PC that is relatively easily assumed to be multi-use and represented as a plurality of loads, and it is also easy to charge the battery if it only has a voltage level of 5V (12V for fast charging).
다시 말해서 무선전력전송 방식에서 1개의 송신기 구조에서 다수의 사용자의 성격이 다른 수신기(부하)를 사용하는 것처럼 보이지만, 실제 구현방식은 비슷한 전력량 또는 비슷한 전압레벨을 보유하고 있는 수신기를 사용하여 다중의 무선전력전송이 가능한 것으로 구현되고 있다.In other words, in the wireless power transmission method, it seems that a plurality of users use different receivers (loads) in one transmitter structure, but the actual implementation method uses multiple radios using receivers having similar amounts of power or similar voltage levels. Power transmission is implemented.
종래 기술은 1개의 송신기에서 큰 출력을 만들어 내어 수신기에서 원하는 전력값 혹은 전압레벨을 만드는데, 수신부의 기본적인 구성은 코일과 캐패시터의 조합 및 브릿지 정류 또는 기타 방법의 정류방법을 거쳐서 생성되는 전압을 벅컨버팅(buck converting; 또는 스텝다운) 하여 원하는 전력의 전압과 전류를 만들어 내는 것을 기본적인 원리로 하고, 피드백 회로 또는 제너다이오드 이용등의 방법으로 전압을 제어하기도 한다. The prior art produces a large output at one transmitter to produce the desired power value or voltage level at the receiver. The basic configuration of the receiver consists of a combination of coil and capacitor and buck-converting the voltage generated through bridge rectification or other methods of rectification. The basic principle is to generate the desired voltage and current by buck converting (or step-down), and the voltage may be controlled by using a feedback circuit or a zener diode.
그런데. 기 개발된 DC-DC컨버팅 혹은 스텝다운 집적회로는 IC(integrated circuit) 기반으로 제작되기 때문에 IC가 직접 전압을 받아서 제어 하는 레벨은 한계가 있다.By the way. Since DC-DC converting or step-down integrated circuits are developed based on integrated circuits (ICs), the level at which the IC directly receives and controls the voltage is limited.
현재 출시되는 DC-DC 컨버터의 IC 최대 입력값은 90V 정도 이다. 물론 90V 이상의 전압을 인가 받아서 컨버팅 하는 방법도 있지만 변압기등을 사용해야 하고, 부피가 커져서 실제 사용하는데 제한 사항이 따른다.The maximum input voltage of the current DC-DC converter is about 90V. Of course, there is a way to convert by applying a voltage above 90V, but it is necessary to use a transformer, etc., and it is bulky, so there are restrictions on actual use.
또한 90V 이상의 전압을 사용하여 DC-DC 컨버팅하여 5V로 사용하고자 하면, 그 전압 차이만큼 대부분 발열과 기타 손실로 인하여 효율 급감의 원인이 된다.In addition, if you use DC-DC converting voltage to more than 90V to 5V, most of the voltage difference due to heat generation and other losses cause the efficiency drop.
따라서, 1개의 송신기에 전력 레벨 전압 레벨이 상이한 제품을 동시에 수신하기 위해서는 기본적으로 큰 전력 전압이 필요로 한 수신기를 기본으로 상정하고, 그에 맞추어 송신기의 용량을 키워야 한다. 반대로 큰 전력 전압이 필요 없는 아주 작은 제품에서는 높은 전력 전압이 필요 없으며, 그에 적절한 소형의 컨버터 기술만 필요하게 된다.Therefore, in order to simultaneously receive products having different power level voltage levels in one transmitter, it is necessary to basically assume a receiver requiring a large power voltage, and to increase the capacity of the transmitter accordingly. Conversely, very small products that do not require large power voltages do not need high power voltages, and only small converter technology suitable for them.
또한 소형의 컨버터를 동시에 만들었다고 해도 현존하는 IC 기반의 컨버터에서는 큰 발열 등으로 적용하기 쉽지 않다. 이것을 구현했다 하더라도, LC로 이루어진 공진회로가 기본인 구조에서 상호 전력 및 전압이 상이한 제품의 수신부가 근접해 있는 경우, 자기 유도현상에 의해서 큰 전력 전압의 제품의 전압레벨이 작은 전력 전압 쪽으로 유기되어 작은 전력 제품에는 큰 손상 및 손실을 초래 한다. 또한 무선전력특성상 송신부와 수신부가 가까워 질수록 전력량의 변화가 크기에 (전력 레벨은 가까울수록 높고 멀어질 수록 낮아짐) 원하는 위치에 정확한 전력 전압을 유지 하기 힘들다.In addition, even if a small converter is made at the same time, it is not easy to apply due to large heat generation in existing IC-based converters. Even if this is implemented, in the structure where the resonant circuit composed of LC is basic, when the receivers of products having different mutual power and voltage are close to each other, magnetic induction causes the voltage level of the product of the large power voltage to be induced toward the smaller power voltage. Power products cause great damage and loss. In addition, due to the wireless power characteristic, the closer the transmitter and the receiver are, the larger the power change (the higher the power level is, the lower the distance is).
각 전력이 다른 제품을 1개의 송신기에 다중으로 사용하기 위해서는 각각의 전력 수요에 맞는 전력이 어떠한 경우라도 공급 및 유지 되는 방법이 필요하다.In order to use multiple products with different powers in one transmitter, there is a need for a method in which power for each power demand is supplied and maintained in any case.
무선전력전송장치의 수신기의 구성 변경을 통하여 고전압 고출력의 전원을 생성하기 위한 많은 시도가 있다.Many attempts have been made to generate high voltage, high output power through configuration changes in the receiver of a wireless power transmitter.
한국 공개특허공보 제10-2016-0057278호는 어느 하나가 다른 하나를 감싸는 제1 및 제2코일을 설치하고, 두 코일 중의 어느 하나의 원주를 따라 이격 배치된 차폐 부재를 설치하고, 제어부가 제1 코일 또는 제2코일이나 두 코일을 동시에 이용하는 기술을 개시하고 있다. 그러나, 이 특허는 코일의 숫자와 배열을 언급하고 있을 뿐, 수신기의 회로와 관련한 구조나 기능에 대해서는 전혀 개시하지 않고 있다.Korean Patent Laid-Open Publication No. 10-2016-0057278 discloses a first and a second coil, one of which surrounds another, a shielding member spaced apart along a circumference of one of two coils, and Disclosed is a technique of using one coil or a second coil or two coils simultaneously. However, the patent only mentions the number and arrangement of the coils and does not disclose any structure or function related to the circuitry of the receiver.
한국 공개특허공보 제10-2013-0116230호는 수신기에 공진용 코일과 유도용 코일을 두 개 배치하고, 유도용 코일을 정류기에 연결하고 배터리 관리 소자가 부하에 전달되는 전력을 유지하거나 차단하도록 한 무선전력 전송 시스템을 개시하고 있다. 그러나, 이 특허에서 두 개의 코일을 이용하는 것은 자기 공진식의 무선 전력 전송 때문이며, 자기 유도식에 의하는 경우 공진용 코일은 필요 없는 점에서 복수의 코일 사용은 선택 사항이고, 배터리 관리 소자를 제외한 다른 구성은 기존의 무선전력시스템과 차이가 없는 점에서 한계가 있다.Korean Patent Laid-Open Publication No. 10-2013-0116230 discloses two resonance coils and two induction coils in a receiver, connecting an induction coil to a rectifier, and maintaining or interrupting power delivered to a load by a battery management element. A wireless power transmission system is disclosed. However, the use of two coils in this patent is due to the self-resonant wireless power transmission, and in the case of magnetic induction, the use of a plurality of coils is optional since no resonant coil is required. The configuration is limited in that it is not different from the existing wireless power system.
한국 공개특허공보 제10-2015-0134107호는 수신기의 캐패시터에 스위치 소자를 연결하여 스위치 제어부가 수신 공진기의 인덕터에 전력이 최대로 저장된 시점에서 스위치를 개방하여 부하로 전력을 전달하는 내용을 개시하고 있다. 그러나, 이 특허는 스위칭의 온/오프 동작으로 전력 전달을 제어하고 수신기의 코일에 대해서는 아무런 구조적인 변경을 가하지 않으므로 부하에 고전압의 전력을 공급하고 전력을 제어 하는데 한계가 있다.Korean Patent Laid-Open Publication No. 10-2015-0134107 discloses a matter in which a switch element is connected to a capacitor of a receiver so that the switch controller opens the switch at a time when the power is stored in the inductor of the reception resonator to the maximum to transfer power to the load. have. However, this patent is limited in supplying high voltage power to the load and controlling power by controlling power transfer by switching on / off operation and making no structural changes to the coil of the receiver.
한국 공개특허공보 제10-2013-044647호는 공진 방식 무선 충전 시스템용 수신 전력 변환 장치에 있어서, 수신기의 LC회로에 스위치를 연결하고 스위칭 동작에 의하여 무선 전력 수신부에서 수신된 교류 형태의 전원을 환류(free-wheeling)시키는 경로를 형성하고, 전력 변환 장치의 출력 신호를 피드백 받아 레벨을 검출하여 이 검출된 출력 레벨에 따라 스위칭부의 스위칭 동작을 제어하는 내용을 개시하고 있다. 그러나, 이 특허 역시 스위칭의 온/오프 동작으로 전력 전달을 제어하고 수신기의 코일에 대해서는 아무런 구조적인 변경을 가하지 않으므로 부하에 고전압의 전력을 공급하고 전력을 제어 하는데 한계가 있다.Korean Patent Laid-Open Publication No. 10-2013-044647 relates to a receiving power converter for a resonant wireless charging system, comprising: connecting a switch to an LC circuit of a receiver and refluxing an alternating current type power received from a wireless power receiver by a switching operation. A method of forming a free-wheeling path, receiving an output signal of a power converter, detecting a level, and controlling a switching operation of the switching unit according to the detected output level are disclosed. However, this patent also has a limitation in supplying high voltage power to the load and controlling power by controlling power transfer by switching on / off operation and making no structural changes to the coil of the receiver.
본 발명은 고전력의 수급 상황에서 최대 공진주파수에 대응할 수 있고, 이론적 최대 전압보다 작은 최대 허용 전압 이하로 전압을 공급할 수 있는 고전력 고전압의 무선전력전송 수신기를 제공하는 것을 목적으로 한다.An object of the present invention is to provide a high-power high-voltage wireless power transmission receiver that can respond to the maximum resonant frequency in a high power supply and supply situation, and can supply a voltage below a maximum allowable voltage smaller than a theoretical maximum voltage.
상술한 목적을 달성하기 위하여, 본 발명은, 무선전력전송 수신기에 있어서, 송신기와 공진 결합하기 위한 코일과 캐패시터를 병렬로 접속하여 이루어진 공진조합부; 상기 공진조합부의 코일에 병렬 연결되며, 스위치와 버퍼 캐패시터를 포함하는 제어 회로; 상기 공진조합부에서 출력되어 부하로 공급되는 부하전압을 검출하는 검출부; 및 상기 검출부가 검출한 상기 부하전압을 소정의 설정치와 비교하는 비교판단부를 포함하며 구성되며, 상기 소정의 설정치는 최대전압설정치이며, 검출된 상기 부하전압이 상기 최대전압설정치에 도달하면 상기 스위치를 ON시켜 상기 공진조합부가 매칭되는 공진 주파수로부터 다른 주파수가 되도록 공진 주파수를 비매칭시키는 것을 특징으로 하는 수신기를 개시한다.In order to achieve the above object, the present invention provides a wireless power transmission receiver, comprising: a resonance combination unit formed by connecting a coil and a capacitor for resonant coupling with a transmitter in parallel; A control circuit connected in parallel to the coil of the resonance combination unit and including a switch and a buffer capacitor; A detector for detecting a load voltage output from the resonance combination unit to a load; And a comparison judging unit which compares the load voltage detected by the detection unit with a predetermined set value, wherein the predetermined set value is a maximum voltage set value, and when the detected load voltage reaches the maximum voltage set value, the switch is operated. Disclosed is a receiver characterized in that the resonance combination is mismatched so that the resonance combination becomes a different frequency from the matching resonance frequency.
상기 소정의 설정치는 최소전압설정치를 더 포함하며, 검출된 상기 부하전압이 상기 최소전압설정치에 도달하면 상기 스위치를 OFF시켜 상기 공진조합부의 공진주파수를 상기 송신기의 공진주파수와 매칭시킨다.The predetermined set value further includes a minimum voltage set value, and when the detected load voltage reaches the minimum voltage set value, the switch is turned off to match the resonance frequency of the resonant combination part with the resonance frequency of the transmitter.
상기 공진조합부의 상기 코일은 제1코일과 제2코일을 포함하며, 상기 제1코일과 제2코일은 두 코일을 연결하는 브릿지부에 의하여 연결될 수 있다.The coil of the resonance combination unit may include a first coil and a second coil, and the first coil and the second coil may be connected by a bridge part connecting the two coils.
상기 제어회로는 상기 제1코일 또는 제2코일 중의 어느 하나 이상에 연결될 수 있다.The control circuit may be connected to any one or more of the first coil or the second coil.
상기 브릿지부는 정류부에 연결될 수 있다.The bridge portion may be connected to the rectifying portion.
상기 제1코일과 제2코일은 두 코일을 연결하는 링크 또는 탭에 의하여 상기 브릿지부에 연결된다.The first coil and the second coil are connected to the bridge part by a link or a tab connecting the two coils.
또한, 본 발명은 무선전력전송 수신기 제어 방법에 있어서, (a) 송신기와 공진 결합하여 상기 수신기의 부하에 전압을 공급하기 위하여 병렬접속된 코일과 캐패시터로 이루어지는 공진조합부로부터 부하에 공급되는 부하전압을 검출부에 의하여 검출하여, 비교판단부에서 소정의 최소전압설정치 이상 인지를 판단하는 단계; (b) (a) 단계가 긍정되면, 상기 부하에 상기 부하전압을 공급하는 단계; (c) 상기 부하에 공급되는 상기 부하전압을 상기 검출부에 의하여 검출하여, 상기 비교판단부에서 소정의 최대전압설정치에 도달하였는지를 판단하는 단계; 및 (d) (c) 단계가 긍정되면, 상기 공진조합부의 공진주파수를 상기 송신기의 공진주파수와 상이한 다른 주파수가 되도록 비매칭하는 단계로 구성되며, 상기 (d) 단계는 상기 공진조합부에 병렬로 접속되며, 스위치와 버퍼 캐패시터를 포함하여 구성되는 제어회로의 상기 스위치가 ON되면 수행되는 것을 특징으로 하는 무선전력전송 수신기 제어 방법을 개시한다.In addition, the present invention provides a method for controlling a wireless power transmission receiver, comprising: (a) a load voltage supplied to a load from a resonant combination part consisting of a coil and a capacitor connected in parallel to resonantly couple with a transmitter to supply a voltage to a load of the receiver; Detecting by the detection unit, and determining whether the comparison determination unit is greater than or equal to a predetermined minimum voltage set value; (b) if step (a) is positive, supplying the load voltage to the load; (c) detecting the load voltage supplied to the load by the detection unit to determine whether a predetermined maximum voltage set value has been reached by the comparison determination unit; And (d) if step (c) is positive, mismatching the resonant frequency of the resonator combination to be a different frequency from the resonant frequency of the transmitter, wherein step (d) is parallel to the resonant combination. A method of controlling a wireless power transmission receiver characterized in that is performed when the switch of a control circuit, which is connected to the control circuit including a switch and a buffer capacitor, is turned on.
상기 (d) 단계 후, 상기 부하전압이 소정의 상기 최소전압설정치에 도달하면 비매칭하는 단계를 해제하는 단계를 추가로 포함한다.And after the step (d), canceling the mismatching when the load voltage reaches the predetermined minimum voltage setting value.
본 발명은 최대 전압과 최대 효율을 달성하는 공진주파수를 찾고 이에 맞추어 전력을 수급하고 제어하는 것이 어려울 때, 이론적 최대 전압보다 작은 최대 허용 전압 이하에서 안정적으로 출력 전압을 제어할 수 있는 효과를 발휘한다.The present invention has the effect of stably controlling the output voltage below the maximum allowable voltage smaller than the theoretical maximum voltage when it is difficult to find and control the resonant frequency that achieves the maximum voltage and the maximum efficiency. .
본 발명은 수신기의 코일을 브릿지부로 분기하고 간단한 구성의 제어회로를 부가하는 것으로 부하에 출력되는 전압을 제어할 수 있으므로 제작이 간편하며 경제적이다.The present invention is simple and economical because it can control the voltage output to the load by branching the coil of the receiver to the bridge and adding a control circuit of a simple configuration.
도 1은 본 발명의 일 실시예에 따른 코일을 도시한 사시도이다.1 is a perspective view showing a coil according to an embodiment of the present invention.
도 2는 본 발명의 다른 실시예에 따른 코일을 도시한 사시도이다.2 is a perspective view showing a coil according to another embodiment of the present invention.
도 3은 도 2의 코일이 정류부에 연결된 것을 도시한 회로이다.3 is a circuit diagram illustrating that the coil of FIG. 2 is connected to a rectifying unit.
도 4는 본 발명의 일 실시예에 따른 제어회로를 포함한 수신기의 일부 회로도이다.4 is a partial circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 스위치의 회로도이다.5 is a circuit diagram of a switch according to an embodiment of the present invention.
도 6은 본 발명의 일 실시예에 따른 부하 출력 제어 방법을 설명한 그래프이다.6 is a graph illustrating a load output control method according to an embodiment of the present invention.
도 7는 본 발명의 일 실시예에 따른 제어회로를 포함한 수신기의 회로도이다.7 is a circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
도 8은 본 발명의 일 실시예에 따른 고전력 고전압 무선전력전송 방법의 제어 단계를 보인 플로우 챠트이다.8 is a flow chart showing a control step of a high power high voltage wireless power transmission method according to an embodiment of the present invention.
도 1은 본 발명의 일 실시예에 따른 코일을 도시한 사시도이다.1 is a perspective view showing a coil according to an embodiment of the present invention.
도 2는 본 발명의 다른 실시예에 따른 코일을 도시한 사시도이다.2 is a perspective view showing a coil according to another embodiment of the present invention.
도 3은 도 2의 코일이 정류부에 연결된 것을 도시한 회로이다.3 is a circuit diagram illustrating that the coil of FIG. 2 is connected to a rectifying unit.
도 4는 본 발명의 일 실시예에 따른 제어회로를 포함한 수신기의 일부 회로도이다.4 is a partial circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
도 5는 본 발명의 일 실시예에 따른 스위치의 회로도이다.5 is a circuit diagram of a switch according to an embodiment of the present invention.
도 6은 본 발명의 일 실시예에 따른 부하 출력 제어 방법을 설명한 그래프이다.6 is a graph illustrating a load output control method according to an embodiment of the present invention.
도 7는 본 발명의 일 실시예에 따른 제어회로를 포함한 수신기의 회로도이다.7 is a circuit diagram of a receiver including a control circuit according to an embodiment of the present invention.
도 8은 본 발명의 일 실시예에 따른 고전력 고전압 무선전력전송 방법의 제어 단계를 보인 플로우 챠트이다.8 is a flow chart showing a control step of a high power high voltage wireless power transmission method according to an embodiment of the present invention.

Claims (8)

  1. 무선전력전송 수신기에 있어서,In the wireless power transmission receiver,
    송신기와 공진 결합하기 위한 코일과 캐패시터를 병렬로 접속하여 이루어진 공진조합부;A resonance combination unit formed by connecting a coil and a capacitor for resonance coupling with a transmitter in parallel;
    상기 공진조합부의 코일에 병렬 연결되며, 스위치와 버퍼 캐패시터를 포함하는 제어 회로;A control circuit connected in parallel to the coil of the resonance combination unit and including a switch and a buffer capacitor;
    상기 공진조합부에서 출력되어 부하로 공급되는 부하전압을 검출하는 검출부; 및A detector for detecting a load voltage output from the resonance combination unit to a load; And
    상기 검출부가 검출한 상기 부하전압을 소정의 설정치와 비교하는 비교판단부를 포함하며 구성되며,And a comparison determination unit for comparing the load voltage detected by the detection unit with a predetermined set value,
    상기 소정의 설정치는 최대전압설정치이며, 검출된 상기 부하전압이 상기 최대전압설정치에 도달하면 상기 스위치를 ON시켜 상기 공진조합부가 매칭되는 공진 주파수로부터 다른 주파수가 되도록 공진 주파수를 비매칭시키는 것을 특징으로 하는 수신기.The predetermined set value is a maximum voltage set value, and when the detected load voltage reaches the maximum voltage set value, the switch is turned on so that the resonance frequency is mismatched so that the resonance combination becomes a different frequency from the matched resonance frequency. Receiver.
  2. 제 1항에 있어서,The method of claim 1,
    상기 소정의 설정치는 최소전압설정치를 더 포함하며, 검출된 상기 부하전압이 상기 최소전압설정치에 도달하면 상기 스위치를 OFF시켜 상기 공진조합부의 공진주파수를 상기 송신기의 공진주파수와 매칭시키는 것을 특징으로 하는 수신기.The predetermined setting value further includes a minimum voltage setting value, and when the detected load voltage reaches the minimum voltage setting value, the switch is turned off to match the resonance frequency of the resonance combination unit with the resonance frequency of the transmitter. receiving set.
  3. 제 1항에 있어서,The method of claim 1,
    상기 공진조합부의 상기 코일은 제1코일과 제2코일을 포함하며, 상기 제1코일과 제2코일은 두 코일을 연결하는 브릿지부에 연결되는 것을 특징으로 하는 수신기.The coil of the resonance combination unit includes a first coil and a second coil, the first coil and the second coil is a receiver, characterized in that connected to the bridge connecting the two coils.
  4. 제 3항에 있어서,The method of claim 3, wherein
    상기 제어회로는 상기 제1코일 또는 제2코일 중의 어느 하나 이상에 연결되는 것을 특징으로 하는 수신기.And the control circuit is connected to at least one of the first coil and the second coil.
  5. 제 3항에 있어서,The method of claim 3, wherein
    상기 브릿지부는 정류부에 연결되는 것을 특징으로 하는 수신기.And the bridge portion is connected to the rectifying portion.
  6. 제 3항에 있어서,The method of claim 3, wherein
    상기 제1코일과 제2코일은 두 코일을 연결하는 링크 또는 탭에 의하여 상기 브릿지부에 연결되는 것을 특징으로 하는 수신기.And the first coil and the second coil are connected to the bridge part by a link or a tap connecting the two coils.
  7. 무선전력전송 수신기 제어 방법에 있어서,In the wireless power transmission receiver control method,
    (a) 송신기와 공진 결합하여 상기 수신기의 부하에 전압을 공급하기 위하여 병렬접속된 코일과 캐패시터로 이루어지는 공진조합부로부터 부하에 공급되는 부하전압을 검출부에 의하여 검출하여, 비교판단부에서 소정의 최소전압설정치 이상 인지를 판단하는 단계;(a) The detection unit detects the load voltage supplied to the load from the resonant combination unit consisting of a coil and a capacitor connected in parallel to resonately couple with the transmitter to supply a voltage to the load of the receiver. Determining whether the voltage is equal to or greater than a set value;
    (b) 상기 (a) 단계가 긍정되면, 상기 부하에 상기 부하전압을 공급하는 단계;(b) if step (a) is positive, supplying the load voltage to the load;
    (c) 상기 부하에 공급되는 상기 부하전압을 상기 검출부에 의하여 검출하여, 상기 비교판단부에서 소정의 최대전압설정치에 도달하였는지를 판단하는 단계; 및 (c) detecting the load voltage supplied to the load by the detection unit to determine whether a predetermined maximum voltage set value has been reached by the comparison determination unit; And
    (d) 상기 (c) 단계가 긍정되면, 상기 공진조합부의 공진주파수를 상기 송신기의 공진주파수와 상이한 다른 주파수가 되도록 비매칭하는 단계로 구성되며,(d) if step (c) is positive, mismatching the resonant frequency of the resonator combination to be different from the resonant frequency of the transmitter;
    상기 (d) 단계는 상기 공진조합부에 병렬로 접속되며, 스위치와 버퍼 캐패시터를 포함하여 구성되는 제어회로의 상기 스위치가 ON되면 수행되는 것을 특징으로 하는 무선전력전송 수신기 제어 방법.The step (d) is connected in parallel to the resonator combining unit, the wireless power transmission receiver control method characterized in that is performed when the switch of the control circuit comprising a switch and a buffer capacitor is turned on.
  8. 제 7항에 있어서,The method of claim 7, wherein
    상기 (d) 단계 후, 상기 부하전압이 소정의 상기 최소전압설정치에 도달하면 비매칭하는 단계를 해제하는 단계를 추가로 포함하는 것을 특징으로 하는 무선전력전송 수신기 제어 방법.And after step (d), canceling the mismatching when the load voltage reaches a predetermined minimum voltage setting value.
PCT/KR2018/001592 2017-04-17 2018-02-06 High-power and high-voltage wireless power transmission receiver WO2018194247A1 (en)

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KR20130101246A (en) * 2012-03-05 2013-09-13 엘지이노텍 주식회사 Apparatus for receiving wireless power and system for transmitting wireless power and method for delivering wireless power
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KR20130101246A (en) * 2012-03-05 2013-09-13 엘지이노텍 주식회사 Apparatus for receiving wireless power and system for transmitting wireless power and method for delivering wireless power
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