WO2022124611A1 - Wireless charging apparatus for electronic devices - Google Patents

Wireless charging apparatus for electronic devices Download PDF

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Publication number
WO2022124611A1
WO2022124611A1 PCT/KR2021/016651 KR2021016651W WO2022124611A1 WO 2022124611 A1 WO2022124611 A1 WO 2022124611A1 KR 2021016651 W KR2021016651 W KR 2021016651W WO 2022124611 A1 WO2022124611 A1 WO 2022124611A1
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Prior art keywords
coil
coil body
wireless charging
charging
ferromagnetic
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PCT/KR2021/016651
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French (fr)
Korean (ko)
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조현경
서석태
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조현경
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Publication of WO2022124611A1 publication Critical patent/WO2022124611A1/en

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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
    • H02J50/005—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
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • 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
    • 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
    • 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
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H02J50/402—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices the two or more transmitting or the two or more receiving devices being integrated in the same unit, e.g. power mats with several coils or antennas with several sub-antennas
    • 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

Definitions

  • the present invention relates to a wireless charging device, and more particularly, to a wireless charging device for an electronic device that can be charged uniformly and with high efficiency in all areas regardless of the location and direction in which the electronic device to be charged is placed.
  • a method of charging an electronic device such as a smart phone can be divided into a contact type charging method and a non-contact type charging method.
  • the contact-type charging method is a method in which charging is performed by directly contacting an electrode connected to a battery of an electronic device and an electrode of a power feeding means, and is generally used in various fields due to its simple structure.
  • the non-contact charging method that is, the wireless charging method, is a method of charging using the principle of electromagnetic induction.
  • a wireless charger is equipped with a transmitting coil and an electronic device that is a charging target is equipped with a receiving coil, and the magnetic induction method between the transmitting coil and the receiving coil. It is a method of charging a battery provided in an electronic device by converting the current generated by the device into energy.
  • the above-described conventional wireless charging method can be roughly divided into two types.
  • One is the 'vertical magnetic flux approach' method (vertical charging method), and the other is the 'horizontal magnetic flux approach' method (horizontal charging method).
  • a charging device transmitter
  • an electronic device receiveriver
  • the vertical charging method can provide sufficient charging efficiency at a predetermined location such as a charging area inside the transmission coil, but on the other hand, there is a problem in that the magnetic field exposure is large and power pulsation occurs in the vertical direction.
  • the charging device when expanding to a wide range for charging, the charging device must have a configuration in which a plurality of coils are arranged in a horizontal direction as shown in FIG. 1B, making optimization difficult and heat generation problems occur.
  • the charging device and the electronic device are horizontally arranged so that a magnetic field is formed in a horizontal direction.
  • the charging range is wide because the charging area is between the transmitting coils.
  • the distance between the transmitting coils is sufficiently spaced apart, so that there is less interference between the coils, so optimization is easy, and there is an advantage in that heat is relatively small because many coils are not required for expansion.
  • the surface where the receiving coil of the electronic device meets the magnetic field must be wide, the charging efficiency is lower than that of the vertical charging method, so the effectiveness is not good.
  • the charging method of the conventional wireless charging device has problems in that it is difficult to have uniform charging efficiency over a large area, and the charging efficiency is low.
  • most of the conventional wireless charging methods have a problem in that the degree of freedom is limited as most of them have a structure in which only 1:1 charging is possible at a fixed location.
  • an object of the present invention is to provide a wireless charging device for electronic devices that can provide a uniform and sufficiently high charging efficiency in a wider range compared to the conventional wireless charging method.
  • Another object of the present invention is to provide a wireless charging device for electronic devices that allows the charging area to be freely expanded.
  • a wireless charging device for an electronic device a ferromagnetic material (ferromagnetic or ferrimagnetic substance) of a predetermined size; and a plurality of coil bodies installed on the ferromagnetic body, wherein the coil body is a first coil body and a second coil body on which a coil is wound, and the first coil body and the second coil body are left and right upper surfaces of the ferromagnetic body. It is characterized in that it is disposed while being inclined toward the lower surface of the center at the end.
  • the centers of the first coil body and the second coil body facing each other are installed to be spaced apart from each other by a predetermined distance.
  • the ferromagnetic material is made of ferrite.
  • a wireless charging device for an electronic device a ferromagnetic material (ferromagnetic or ferrimagnetic substance) of a predetermined size; and a plurality of coil bodies installed on the ferromagnetic body, wherein the plurality of coil bodies are disposed while being inclined parallel to each other in the same direction from an upper surface to a lower surface of the ferromagnetic body.
  • a ferromagnetic material ferromagnetic or ferrimagnetic substance
  • the ferromagnetic material is made of ferrite.
  • At least one ferromagnetic body in which the coil body is installed is further installed in a vertical or horizontal direction to expand a charging area.
  • a ferromagnetic material (ferrite plate) is adopted as a transmission medium instead of air, and a plurality of coil bodies having coils wound therein are used while facing each other and symmetrically inclined, or the same It was arranged to be inclined side by side in the direction.
  • the effective magnetic field size of the wireless charging device is improved to provide an effect of charging electronic devices with the same charging efficiency in all areas of the wireless charging device. That is, it is possible to charge the electronic device no matter where the electronic device is placed in the charging device.
  • FIG. 1 is a view showing a vertical charging method in which a conventional transmitter and a receiver are vertically arranged;
  • FIG. 2 is a view illustrating a conventional horizontal charging method in which a transmitter and a receiver are horizontally disposed;
  • FIG. 3 is a view showing a first charging method applied to the wireless charging device of the present invention.
  • FIG. 4 is a view showing a second charging method applied to the wireless charging device of the present invention.
  • FIG. 5 is an exemplary view comparing mutual inductance values when a transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed inclinedly as in the first charging method of FIG.
  • FIG. 6 is an exemplary view comparing mutual inductance values when the transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed at an angle like the second charging method of FIG.
  • FIG. 9 is a simulation of the basic structure and mutual inductance change of the transmitter to which the coil body structure of the first charging method shown in FIG. 3 is applied;
  • the ferrite plate which is the basic structure of the present invention, extends in a vertical direction, and a simulation of changes in mutual inductance
  • FIG. 11 is a simulation of a structure in which a ferrite plate, which is the basic structure of the present invention, is extended in the horizontal direction and a change in mutual inductance;
  • FIG. 3 is a view showing a first charging method applied to the wireless charging device of the present invention.
  • the wireless charging device 100 to which the first charging method is applied is provided with a ferrite plate 110 having a substantially rectangular parallelepiped shape having a predetermined size (width ⁇ length ⁇ thickness).
  • the ferrite plate 110 may be one having a predetermined thickness, or a plurality of thin ferrite plates may be stacked to form one.
  • a ferromagnetic or ferrimagnetic substance such as the ferrite plate 110 is adopted as a transmission medium instead of air.
  • the ferrite plate 110 has higher permeability than air. Looking at the equation (the following equation) based on the modeling of a general wireless power transmission circuit, it can be seen that when a medium with higher permeability than air is used, the charging range can be extended while increasing the efficiency. This high ferrite material is used.
  • the ferrite plate 110 is provided with a first coil body 120a and a second coil body 120b as a coil body for wireless transmission of charging power.
  • the first coil body 120a and the second coil body 120b are formed in a rectangular shape corresponding to the shape of the ferrite plate 110 , and the inside is empty and only the upper/lower/left/right edges are wound with coils.
  • the shapes and structures of the first coil body 120a and the second coil body 120b are the same.
  • the first coil body 120a and the second coil body 120b are installed to be inclined at a predetermined angle from the end of the upper surface of the ferrite plate 110 toward the lower surface of the center.
  • the first coil body 120a and the second coil body 120b have one end facing each other in the center and spaced apart from each other by a predetermined distance. That is, when viewed in cross-section, the first coil body 120a and the second coil body 120b are placed in a substantially V-shape spaced apart from each other by a predetermined distance without the central portions contacting each other.
  • the wireless charging device 200 to which the second charging method of FIG. 4 is applied is provided with a ferrite plate 210 having a substantially rectangular parallelepiped shape having a predetermined size (width ⁇ length ⁇ thickness), and the ferrite plate 210 ), the first coil body 220a and the second coil body 220b are installed to be parallel to each other while being inclined. That is, when viewed in cross section, it is installed in an oblique shape.
  • the first coil body 220a and the second coil body 220b have a coil wound therein, and have a rectangular shape with an empty interior. It can be said that there are only four side surfaces, and the upper and lower surfaces are unformed.
  • the two coil bodies 120a, 120b, 220a, 220b in which the coil is wound on the ferrite plates 110 and 210 show a structure in which they are installed in an inclined manner while being uniformly spaced apart, but the present invention It will be natural that three or more coil bodies can be installed on the silver ferrite plate. It can be variously deformed in consideration of the size of the ferrite plate, the size of the coil body, and the charging area.
  • the first coil body 120a and the second coil body 120b are spaced apart from the center of the ferrite plates 110 and 210 while being inclined at a predetermined angle. It is installed symmetrically to each other, or the first coil body 220a and the second coil body 220b are installed while being inclined in the same direction in parallel. In this way, when a plurality of coil bodies are installed to be inclined on one ferrite plate 110 , 210 , since magnetic fields formed in each coil body can cancel each other, there is an advantage in that efficiency is increased.
  • FIG. 5 is an exemplary view comparing mutual inductance values when the transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed at an angle as in the first charging method of FIG. 3, According to the calculation results, it was confirmed that the average value of the conventional inductance value was 0.9 and the present invention was about 4.69, which was improved by about 5.5 times or more.
  • FIG. 6 is an exemplary view comparing mutual inductance values when the transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed at an angle as in the second charging method of FIG. Similarly, according to the calculation results, it was confirmed that the average value of the conventional inductance value was 0.9, whereas the present invention was about 5.13, which was improved by about 5.7 times.
  • the coil body is formed in a horizontal direction, it can be called an advanced horizontal approach. It has a structure in which a plurality of transmission coils are provided. Looking at the efficiency of a transmitter to which one general transmission coil, a plurality of non-slanted transmission coils, and a plurality of transmission coils wound obliquely as in the present invention are applied, the transmission unit of the present invention has higher efficiency than other transmission coils.
  • FIGS. 7A and 7B Indices indicating the efficiency performance of each transmitter according to the experimental results are shown in FIGS. 7A and 7B .
  • This shows the transmission efficiency in the horizontal (x-axis) - vertical (y-axis) direction of the transmitter, and it can be seen that the efficiency appears uniformly over the entire area of the transmitter. In other words, it means that wireless charging can be performed efficiently even if the receiver is positioned regardless of the location of the transmitter.
  • the present invention it is possible to freely expand the charging area by locating the transmitting units adjacent to each other.
  • the key is to minimize interference between transmitters, which can be verified through experiments.
  • FIG. 8 is an exemplary diagram in which about 20 transmission coils are used in a charging device of a certain area, but it has the above-mentioned problems as it is, and thus the wireless power cannot be effectively supplied.
  • the present invention provides effects that can be optimized because the number of coils is small, charging of a large area is possible, there is no heat problem, and there is no interference problem between the coils. This was verified through simulation.
  • FIG. 9 is a basic structure of a transmitter to which the coil body structure of the first charging method shown in FIG. 3 is applied.
  • FIG. 9A when the size of the ferrite plate is 10 cm ⁇ 10 cm and the widths of the first coil body and the second coil body are 25 mm, respectively, a simulation of a change in mutual inductance is the same as that of FIG. 9B .
  • FIGS. 10 and 11 are cases in which the basic structure of FIG. 9 is expanded in a vertical direction (y-axis) and a horizontal direction (x-axis), respectively, and show simulations of changes in mutual inductance.
  • the present invention adopts a ferromagnetic material (ferrite plate) instead of air as a transmission medium for a charging device for wireless charging, and uses a plurality of coil bodies wound with coils to face each other while facing each other and symmetrically inclined, or side by side in the same direction It can be seen that the same charging efficiency can be provided in all areas of the charging device by improving the effective magnetic field size by arranging it to be slanted.
  • ferromagnetic material ferrite plate
  • It can be used for wireless charging devices that can be freely charged in an expanded charging area.

Abstract

The present invention proposes a wireless charging apparatus for electronic devices, which, regardless of the position and direction in which an electronic device to be charged is placed, can uniformly charge the electronic device with high efficiency over the entire area. The wireless charging apparatus comprises a ferromagnetic or ferrimagnetic substance having a predetermined size and a plurality of coil bodies disposed in the ferromagnetic or ferrimagnetic substance. The coil bodies are arranged to be inclined from the left and right ends of the upper surface toward the center of the lower surface of the ferromagnetic or ferrimagnetic substance, or arranged to be inclined from the upper surface toward the lower surface of the ferromagnetic or ferrimagnetic substance in the same direction and in parallel with each other.

Description

전자기기용 무선 충전장치Wireless charging device for electronic devices
본 발명은 무선 충전장치에 관한 것으로, 특히 충전대상인 전자기기가 놓여지는 위치 및 방향에 상관없이 모든 면적에서 균일하고 높은 효율로 충전시킬 수 있는 전자기기용 무선 충전장치에 관한 것이다.The present invention relates to a wireless charging device, and more particularly, to a wireless charging device for an electronic device that can be charged uniformly and with high efficiency in all areas regardless of the location and direction in which the electronic device to be charged is placed.
스마트 폰과 같은 전자기기를 충전하는 방식은 접촉형 충전 방식 및 비접촉형 충전 방식으로 구분할 수 있다. 접촉형 충전 방식은 전자기기의 배터리와 연결된 전극과 급전 수단의 전극을 직접 밀착시켜 충전이 이루어지는 방식으로서, 그 구조가 단순하여 다양한 분야에 일반적으로 사용되고 있다. 하지만, 커넥터 연결 등과 같이 전자기기의 전극과 급전 수단의 전극을 물리적으로 연결해야만 하는 불편함이 있었다.A method of charging an electronic device such as a smart phone can be divided into a contact type charging method and a non-contact type charging method. The contact-type charging method is a method in which charging is performed by directly contacting an electrode connected to a battery of an electronic device and an electrode of a power feeding means, and is generally used in various fields due to its simple structure. However, there is the inconvenience of having to physically connect the electrode of the electronic device and the electrode of the power feeding means, such as a connector connection.
이러한 접촉형 충전 방식의 불편함을 해결하기 위하여 비접촉형 충전 방식이 제안되었다. 비접촉형 충전 방식, 즉 무선충전 방식은 전자유도 원리를 이용하여 충전하는 방식으로, 무선충전기에 송신코일을 구비하고 충전대상인 전자기기에 수신코일을 구비하여, 송신코일과 수신코일 간의 자기 유도방식에 의해 발생한 전류를 에너지로 변환하여 전자기기에 마련된 배터리를 충전하는 방식이다.In order to solve the inconvenience of the contact-type charging method, a non-contact charging method has been proposed. The non-contact charging method, that is, the wireless charging method, is a method of charging using the principle of electromagnetic induction. A wireless charger is equipped with a transmitting coil and an electronic device that is a charging target is equipped with a receiving coil, and the magnetic induction method between the transmitting coil and the receiving coil. It is a method of charging a battery provided in an electronic device by converting the current generated by the device into energy.
상기한 종래 무선충전 방식은 크게 2가지로 구분할 수 있다. 하나는 'vertical magnetic flux approach' 방식(수직충전방식), 다른 하나는 'horizontal magnetic flux approach' 방식(수평충전방식)이다. The above-described conventional wireless charging method can be roughly divided into two types. One is the 'vertical magnetic flux approach' method (vertical charging method), and the other is the 'horizontal magnetic flux approach' method (horizontal charging method).
상기 수직충전방식은 도 1a에 도시한 바와 같이 충전장치(송신부)와 전자기기(수신부)가 수직되게 배치되어 자기장이 수직방향으로 형성되는 구조이다. 현재 대부분의 무선 충전장치가 채택하는 방식이다. 수직충전방식은 송신코일 내측의 충전 영역과 같이 정해진 위치에서는 충분한 충전 효율을 제공할 수 있지만, 반면 자기장 노출이 크고 수직방향으로 파워 맥동(power pulsation) 발생하는 문제가 있다. 특히 충전을 위해 넓은 범위로 확장할 경우 충전장치에는 도 1b에 도시한 바와 같이 복수 개의 코일이 수평방향으로 배치되는 구성이 반드시 필요하여 최적화가 어렵고 발열 문제가 발생한다.In the vertical charging method, as shown in FIG. 1A , a charging device (transmitter) and an electronic device (receiver) are vertically disposed so that a magnetic field is formed in a vertical direction. This is the method currently adopted by most wireless charging devices. The vertical charging method can provide sufficient charging efficiency at a predetermined location such as a charging area inside the transmission coil, but on the other hand, there is a problem in that the magnetic field exposure is large and power pulsation occurs in the vertical direction. In particular, when expanding to a wide range for charging, the charging device must have a configuration in which a plurality of coils are arranged in a horizontal direction as shown in FIG. 1B, making optimization difficult and heat generation problems occur.
상기 수평충전방식은 도 2a에 도시한 바와 같이 충전장치와 전자기기가 수평되게 배치되어 자기장이 수평방향으로 형성되는 구조이다. 송신코일들 사이가 충전 영역이 되기 때문에 충전범위가 넓다. 또 상기 수직충전방식과 비교하면 송신코일 사이의 거리가 충분이 이격되어 있어 코일 간의 간섭이 적어 최적화가 쉽고 확장에 많은 코일이 필요하지 않아 발열이 상대적으로 적은 이점이 있다. 그러나 전자기기의 수신코일이 자기장과 만나는 면이 넓어야 하기 때문에 상기 수직충전방식보다 충전 효율이 낮아 효용성이 좋지 못하다. In the horizontal charging method, as shown in FIG. 2A , the charging device and the electronic device are horizontally arranged so that a magnetic field is formed in a horizontal direction. The charging range is wide because the charging area is between the transmitting coils. In addition, compared to the vertical charging method, the distance between the transmitting coils is sufficiently spaced apart, so that there is less interference between the coils, so optimization is easy, and there is an advantage in that heat is relatively small because many coils are not required for expansion. However, since the surface where the receiving coil of the electronic device meets the magnetic field must be wide, the charging efficiency is lower than that of the vertical charging method, so the effectiveness is not good.
이처럼 종래 무선 충전장치의 충전 방식은 넓은 면적에서 균일한 충전 효율을 가지기 어렵고, 충전 효율이 낮은 문제가 있다. 그리고 종래 무선충전방식은 대부분이 정해진 위치에 1:1 충전만 가능한 구조로서 자유도에 제한이 큰 문제가 있다.As such, the charging method of the conventional wireless charging device has problems in that it is difficult to have uniform charging efficiency over a large area, and the charging efficiency is low. In addition, most of the conventional wireless charging methods have a problem in that the degree of freedom is limited as most of them have a structure in which only 1:1 charging is possible at a fixed location.
따라서 본 발명은 종래 무선충전방식 대비 더 넓은 범위에서 균일하면서도 충분하게 높은 충전효율을 제공할 수 있는 전자기기용 무선 충전장치를 제공함에 목적이 있다.Accordingly, an object of the present invention is to provide a wireless charging device for electronic devices that can provide a uniform and sufficiently high charging efficiency in a wider range compared to the conventional wireless charging method.
본 발명의 다른 목적은 충전면적을 자유롭게 확장할 수 있게 한 전자기기용 무선 충전장치를 제공하는 것이다. Another object of the present invention is to provide a wireless charging device for electronic devices that allows the charging area to be freely expanded.
본 발명의 실시 예에 따른 전자기기용 무선 충전장치는, 소정 사이즈의 강자성체(ferromagnetic or ferrimagnetic substance); 및 상기 강자성체에 설치된 복수 개의 코일체를 포함하고, 상기 코일체는, 코일이 권선된 제1 코일체 및 제2 코일체이고, 상기 제1 코일체와 상기 제2 코일체는 상기 강자성체의 좌우 상면 끝단에서 중앙 하면을 향해 경사지면서 배치되는 것을 특징으로 한다.A wireless charging device for an electronic device according to an embodiment of the present invention, a ferromagnetic material (ferromagnetic or ferrimagnetic substance) of a predetermined size; and a plurality of coil bodies installed on the ferromagnetic body, wherein the coil body is a first coil body and a second coil body on which a coil is wound, and the first coil body and the second coil body are left and right upper surfaces of the ferromagnetic body. It is characterized in that it is disposed while being inclined toward the lower surface of the center at the end.
상기 제1 코일체 및 제2 코일체가 서로 마주보는 중앙은 소정 간격 이격설치된다.The centers of the first coil body and the second coil body facing each other are installed to be spaced apart from each other by a predetermined distance.
상기 강자성체는 페라이트(ferrite)로 제조된다.The ferromagnetic material is made of ferrite.
본 발명의 다른 실시 예에 따른 전자기기용 무선 충전장치는, 소정 사이즈의 강자성체(ferromagnetic or ferrimagnetic substance); 및 상기 강자성체에 설치된 복수 개의 코일체를 포함하고, 상기 복수 개의 코일체는, 상기 강자성체의 상면에서 하면을 향해 동일한 방향으로 서로 평행하게 경사지면서 배치되는 것을 특징으로 한다.A wireless charging device for an electronic device according to another embodiment of the present invention, a ferromagnetic material (ferromagnetic or ferrimagnetic substance) of a predetermined size; and a plurality of coil bodies installed on the ferromagnetic body, wherein the plurality of coil bodies are disposed while being inclined parallel to each other in the same direction from an upper surface to a lower surface of the ferromagnetic body.
상기 강자성체는 페라이트로 제조된다.The ferromagnetic material is made of ferrite.
본 발명의 또 다른 실시 예에 따르면, 상기한 전자기기용 무선장치는, 상기 코일체가 설치된 강자성체가 수직방향 또는 수평방향으로 적어도 하나 이상 더 설치되어 충전면적을 확장하는 것을 특징으로 한다.According to another embodiment of the present invention, in the wireless device for electronic devices, at least one ferromagnetic body in which the coil body is installed is further installed in a vertical or horizontal direction to expand a charging area.
상기와 같이 구성된 본 발명의 전자기기용 무선 충전장치에 따르면, 전송매질로 공기 대신 강자성체(페라이트판)을 채택하고, 코일이 권선된 코일체를 복수 개 사용하면서 서로 마주보면서 대칭되게 경사지게 배치하거나, 같은 방향으로 나란하게 경사지게 배치시키도록 하였다.According to the wireless charging device for electronic devices of the present invention configured as described above, a ferromagnetic material (ferrite plate) is adopted as a transmission medium instead of air, and a plurality of coil bodies having coils wound therein are used while facing each other and symmetrically inclined, or the same It was arranged to be inclined side by side in the direction.
그 결과 무선 충전장치의 유효 자기장 크기가 향상되어 무선 충전장치의 모든 영역에서 동일한 충전 효율로 전자기기를 충전시키는 효과를 제공한다. 즉 충전장치의 어느 위치에 전자기기를 놓더라도 전자기기의 충전이 가능하다. As a result, the effective magnetic field size of the wireless charging device is improved to provide an effect of charging electronic devices with the same charging efficiency in all areas of the wireless charging device. That is, it is possible to charge the electronic device no matter where the electronic device is placed in the charging device.
또한 본 발명은 둘 이상의 송신 코일체를 비스듬하게 배치하고 있어 송신코일 상호간의 간섭을 최소화할 수 있어, 최적화가 용이하여 충전면적을 더 쉽게 확장시킬 수 있는 효과가 있다. In addition, in the present invention, since two or more transmitting coil bodies are arranged obliquely, interference between the transmitting coils can be minimized.
도 1은 종래 송신부와 수신부가 수직되게 배치되는 수직충전방식을 도시한 도면1 is a view showing a vertical charging method in which a conventional transmitter and a receiver are vertically arranged;
도 2는 종래 송신부와 수신부가 수평되게 배치되는 수평충전방식을 도시한 도면2 is a view illustrating a conventional horizontal charging method in which a transmitter and a receiver are horizontally disposed;
도 3은 본 발명의 무선 충전장치에 적용되는 제1 충전방식을 나타낸 도면3 is a view showing a first charging method applied to the wireless charging device of the present invention;
도 4는 본 발명의 무선 충전장치에 적용되는 제2 충전방식을 나타낸 도면4 is a view showing a second charging method applied to the wireless charging device of the present invention;
도 5는 종래기술(즉 도 1 및 도 2를 말함)로 송신코일을 설치한 경우와 도 3의 제1 충전방식과 같이 코일체를 경사지게 설치한 경우의 상호 인덕턴스 값을 비교한 예시 도면5 is an exemplary view comparing mutual inductance values when a transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed inclinedly as in the first charging method of FIG.
도 6은 종래기술(즉 도 1 및 도 2를 말함)로 송신코일을 설치한 경우와 도 4의 제2 충전방식과 같이 코일체를 경사지게 설치한 경우의 상호 인덕턴스 값을 비교한 예시 도면6 is an exemplary view comparing mutual inductance values when the transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed at an angle like the second charging method of FIG.
도 7은 본 발명의 송신부와 다른 송신부의 송신효율을 비교한 그래프7 is a graph comparing the transmission efficiency of the transmitting unit of the present invention and another transmitting unit;
도 8은 종래기술에서 충전영역의 확장을 위해 복수개의 송신코일을 사용한 예시도면8 is an exemplary view using a plurality of transmission coils to expand the charging area in the prior art;
도 9는 도 3에 도시한 제1 충전방식의 코일체 구조가 적용된 송신부의 기본 구조 및 상호 인덕턴스의 변화 시뮬레이션9 is a simulation of the basic structure and mutual inductance change of the transmitter to which the coil body structure of the first charging method shown in FIG. 3 is applied; FIG.
도 10은 본 발명의 기본 구조인 페라이트판을 수직방향으로 연장한 구조 및 상호 인덕턴스의 변화 시뮬레이션10 is a structure in which the ferrite plate, which is the basic structure of the present invention, extends in a vertical direction, and a simulation of changes in mutual inductance;
도 11은 본 발명의 기본 구조인 페라이트판을 수평방향으로 연장한 구조 및 상호 인덕턴스의 변화 시뮬레이션11 is a simulation of a structure in which a ferrite plate, which is the basic structure of the present invention, is extended in the horizontal direction and a change in mutual inductance;
본 발명에서 사용되는 기술적 용어는 단지 특정한 실시 예를 설명하기 위해 사용된 것으로, 본 발명을 한정하려는 의도가 아님을 유의해야 한다. 또한, 본 발명에서 사용되는 기술적 용어는 본 발명에서 특별히 다른 의미로 정의되지 않는 한, 본 발명이 속하는 기술 분야에서 통상의 지식을 가진 자에 의해 일반적으로 이해되는 의미로 해석되어야 하며, 과도하게 포괄적인 의미로 해석되거나, 과도하게 축소된 의미로 해석되지 않아야 한다. 또한, 본 발명에서 사용되는 기술적인 용어가 본 발명의 사상을 정확하게 표현하지 못하는 잘못된 기술적 용어일 때에는, 당업자가 올바르게 이해할 수 있는 기술적 용어로 대체되어 이해되어야 할 것이다. 또한, 본 발명에서 사용되는 일반적인 용어는 사전에 정의되어 있는 바에 따라, 또는 전후 문맥상에 따라 해석되어야 하며, 과도하게 축소된 의미로 해석되지 않아야 한다.It should be noted that the technical terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. In addition, the technical terms used in the present invention should be interpreted as meanings generally understood by those of ordinary skill in the art to which the present invention belongs, unless otherwise specifically defined in the present invention, and excessively comprehensive It should not be construed in the meaning of a human being or in an excessively reduced meaning. In addition, when the technical term used in the present invention is an incorrect technical term that does not accurately express the spirit of the present invention, it should be understood by being replaced with a technical term that can be correctly understood by those skilled in the art. In addition, the general terms used in the present invention should be interpreted according to the definition in the dictionary or according to the context before and after, and should not be interpreted in an excessively reduced meaning.
또한, 본 발명에서 사용되는 단수의 표현은 문맥상 명백하게 다르게 뜻하지 않는 한 복수의 표현을 포함한다. 본 발명에서, "구성된다" 또는 "포함한다" 등의 용어는 발명에 기재된 여러 구성 요소들, 또는 여러 단계를 반드시 모두 포함하는 것으로 해석되지 않아야 하며, 그 중 일부 구성 요소들 또는 일부 단계들은 포함되지 않을 수도 있고, 또는 추가적인 구성 요소 또는 단계들을 더 포함할 수 있는 것으로 해석되어야 한다.Also, the singular expression used in the present invention includes the plural expression unless the context clearly dictates otherwise. In the present invention, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the various components or various steps described in the invention, some of which components or some steps are included. It should be construed that it may not, or may further include additional components or steps.
이하, 첨부된 도면을 참조하여 본 발명에 따른 바람직한 실시 예를 상세히 설명하되, 도면 부호에 관계없이 동일하거나 유사한 구성 요소는 동일한 참조 번호를 부여하고 이에 대한 중복된 설명은 생략하기로 한다.Hereinafter, a preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings, but the same or similar components are assigned the same reference numerals regardless of reference numerals, and redundant description thereof will be omitted.
또한, 본 발명을 설명함에 있어서 관련된 공지 기술에 대한 구체적인 설명이 본 발명의 요지를 흐릴 수 있다고 판단되는 경우 그 상세한 설명을 생략한다. 또한, 첨부된 도면은 본 발명의 사상을 쉽게 이해할 수 있도록 하기 위한 것일 뿐, 첨부된 도면에 의해 본 발명의 사상이 제한되는 것으로 해석되어서는 아니 됨을 유의해야 한다.In addition, in the description of the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, it should be noted that the accompanying drawings are only for easy understanding of the spirit of the present invention, and should not be construed as limiting the spirit of the present invention by the accompanying drawings.
도 3은 본 발명의 무선 충전장치에 적용되는 제1 충전방식을 나타낸 도면이다. 도 1에서 보듯이 제1 충전방식이 적용된 무선 충전장치(100)는 소정 사이즈(가로×세로×두께)를 가지는 대략 직육면체 형상의 페라이트판(ferrite plate)(110)이 구비된다. 페라이트판(110)은 소정 두께를 가지는 하나이거나 얇은 페라이트판이 복수 매 적층되어 하나를 형성할 수 있다. 이처럼 본 발명에서는 전송 매질로 공기 대신 페라이트판(110)과 같은 강자성체(ferromagnetic or ferrimagnetic substance)를 채택하였다. 3 is a view showing a first charging method applied to the wireless charging device of the present invention. As shown in FIG. 1 , the wireless charging device 100 to which the first charging method is applied is provided with a ferrite plate 110 having a substantially rectangular parallelepiped shape having a predetermined size (width×length×thickness). The ferrite plate 110 may be one having a predetermined thickness, or a plurality of thin ferrite plates may be stacked to form one. As such, in the present invention, a ferromagnetic or ferrimagnetic substance such as the ferrite plate 110 is adopted as a transmission medium instead of air.
페라이트판(110)은 공기보다 투자율(Permeability)이 높다. 일반적인 무선전력 전송회로의 모델링을 기반으로 한 방정식(하기 수학식)을 보면 공기보다 투자율이 높은 매질을 사용하면 효율을 높이면서 충전범위를 확장시킬 수 있음을 알 수 있는 바, 본 발명은 이처럼 투자율이 높은 페라이트 재질을 사용한 것이다.The ferrite plate 110 has higher permeability than air. Looking at the equation (the following equation) based on the modeling of a general wireless power transmission circuit, it can be seen that when a medium with higher permeability than air is used, the charging range can be extended while increasing the efficiency. This high ferrite material is used.
Figure PCTKR2021016651-appb-img-000001
Figure PCTKR2021016651-appb-img-000001
상기 페라이트판(110)에는 충전전력의 무선송신을 위한 코일체로서, 제1 코일체(120a) 및 제2 코일체(120b)가 마련된다. 제1 코일체(120a) 및 제2 코일체(120b)는 페라이트판(110) 형상과 대응되는 사각 형상으로 형성되면서 내부는 비어있고 상/하/좌/우 테두리만 코일이 감겨진 형상이다. 제1 코일체(120a) 및 제2 코일체(120b)의 형상이나 구조는 모두 동일하다.The ferrite plate 110 is provided with a first coil body 120a and a second coil body 120b as a coil body for wireless transmission of charging power. The first coil body 120a and the second coil body 120b are formed in a rectangular shape corresponding to the shape of the ferrite plate 110 , and the inside is empty and only the upper/lower/left/right edges are wound with coils. The shapes and structures of the first coil body 120a and the second coil body 120b are the same.
도 3에서 보듯이 상기 제1 코일체(120a) 및 제2 코일체(120b)는 페라이트판(110)의 상부면 끝단부에서 중앙의 하부면을 향해 소정 각도로 경사지도록 설치된다. 그리고 제1 코일체(120a)와 제2 코일체(120b)는 중앙에서 서로 마주보는 일단은 일정 간격 이격된다. 즉 단면으로 보면 제1 코일체(120a)와 제2 코일체(120b)는 중앙부분이 접촉되지 않고 서로 일정 거리 이격된 대략 V자 모양으로 놓이게 되는 것이다.As shown in FIG. 3 , the first coil body 120a and the second coil body 120b are installed to be inclined at a predetermined angle from the end of the upper surface of the ferrite plate 110 toward the lower surface of the center. In addition, the first coil body 120a and the second coil body 120b have one end facing each other in the center and spaced apart from each other by a predetermined distance. That is, when viewed in cross-section, the first coil body 120a and the second coil body 120b are placed in a substantially V-shape spaced apart from each other by a predetermined distance without the central portions contacting each other.
도 4는 본 발명의 무선 충전장치에 적용되는 제2 충전방식을 나타낸 도면이다. 도 4의 제2 충전방식이 적용된 무선 충전장치(200)는, 소정 사이즈(가로×세로×두께)를 가지는 대략 직육면체 형상의 페라이트판(ferrite plate)(210)이 구비되고, 상기 페라이트판(210)에 제1 코일체(220a)와 제2 코일체(220b)가 경사지면서 서로 평형하게 설치된다. 즉 단면으로 보면 사선모양으로 설치된다. 상기 제1 코일체(220a) 및 제2 코일체(220b)는 코일이 감겨져 있으며, 내부가 비어있는 사각모양이다. 4개의 측면만 있고 상면과 저면은 미 형성된 구조라 할 수 있다. 4 is a view showing a second charging method applied to the wireless charging device of the present invention. The wireless charging device 200 to which the second charging method of FIG. 4 is applied is provided with a ferrite plate 210 having a substantially rectangular parallelepiped shape having a predetermined size (width×length×thickness), and the ferrite plate 210 ), the first coil body 220a and the second coil body 220b are installed to be parallel to each other while being inclined. That is, when viewed in cross section, it is installed in an oblique shape. The first coil body 220a and the second coil body 220b have a coil wound therein, and have a rectangular shape with an empty interior. It can be said that there are only four side surfaces, and the upper and lower surfaces are unformed.
본 발명의 실시 예에 따르면, 페라이트 판(110)(210)에 코일이 감겨져 있는 2개의 코일체(120a, 120b, 220a, 220b)가 일정하게 이격되면서 경사지게 설치되는 구조를 도시하고 있지만, 본 발명은 페라이트판에 3개 이상의 코일체를 설치할 수 있음은 당연할 것이다. 페라이트판의 사이즈나 코일체의 크기, 충전 면적 등을 고려하여 다양하게 변형 가능하다는 것이다. According to an embodiment of the present invention, the two coil bodies 120a, 120b, 220a, 220b in which the coil is wound on the ferrite plates 110 and 210 show a structure in which they are installed in an inclined manner while being uniformly spaced apart, but the present invention It will be natural that three or more coil bodies can be installed on the silver ferrite plate. It can be variously deformed in consideration of the size of the ferrite plate, the size of the coil body, and the charging area.
상기한 바와 같이 본 발명은 도 3 및 도 4에 도시한 바와 같이 페라이트판(110, 210)에 제1 코일체(120a) 및 제2 코일체(120b)가 중앙은 이격되되 소정 각도로 경사지면서 서로 대칭되게 설치되거나, 또는 제1 코일체(220a) 및 제2 코일체(220b)가 동일한 방향으로 나란하게 경사지면서 설치되는 구성이다. 이와 같이 하나의 페라이트판(110, 210)에 복수 개의 코일체를 경사지게 설치하면 각각의 코일체에서 형성되는 자기장이 서로 상쇄될 수 있기 때문에 효율이 높아지는 이점이 있다.As described above, in the present invention, as shown in FIGS. 3 and 4 , the first coil body 120a and the second coil body 120b are spaced apart from the center of the ferrite plates 110 and 210 while being inclined at a predetermined angle. It is installed symmetrically to each other, or the first coil body 220a and the second coil body 220b are installed while being inclined in the same direction in parallel. In this way, when a plurality of coil bodies are installed to be inclined on one ferrite plate 110 , 210 , since magnetic fields formed in each coil body can cancel each other, there is an advantage in that efficiency is increased.
본 발명에 따르면, 상기 도 3 및 도 4와 같이 코일을 경사지게 감으면 상호 인덕턴스(mutal inductance) 값도 향상되는데, 이에 대한 시뮬레이션 결과는 도 5 및 도 6과 같다.According to the present invention, when the coil is wound in an inclined manner as shown in FIGS. 3 and 4 , a mutual inductance value is also improved, and simulation results for this are shown in FIGS. 5 and 6 .
도 5는 종래기술(즉 도 1 및 도 2를 말함)로 송신코일을 설치한 경우와 도 3의 제1 충전방식과 같이 코일체를 경사지게 설치한 경우의 상호 인덕턴스 값을 비교한 예시 도면으로, 계산 결과에 따르면 종래 인덕턴스 값의 평균 값은 0.9이고 본 발명은 약 4.69로서 약 5.5배 이상 향상되었음을 확인하였다.5 is an exemplary view comparing mutual inductance values when the transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed at an angle as in the first charging method of FIG. 3, According to the calculation results, it was confirmed that the average value of the conventional inductance value was 0.9 and the present invention was about 4.69, which was improved by about 5.5 times or more.
도 6은 종래기술(즉 도 1 및 도 2를 말함)로 송신코일을 설치한 경우와 도 4의 제2 충전방식과 같이 코일체를 경사지게 설치한 경우의 상호 인덕턴스 값을 비교한 예시 도면이다. 마찬가지로 계산 결과에 따르면 종래 인덕턴스 값의 평균 값은 0.9인 반면 본 발명은 약 5.13으로 약 5.7배 이상 향상되었음을 확인하였다.6 is an exemplary view comparing mutual inductance values when the transmission coil is installed in the prior art (that is, referring to FIGS. 1 and 2) and when the coil body is installed at an angle as in the second charging method of FIG. Similarly, according to the calculation results, it was confirmed that the average value of the conventional inductance value was 0.9, whereas the present invention was about 5.13, which was improved by about 5.7 times.
이를 보면 본 발명의 충전방식 효율이 종래보다 향상되고 있음을 확인할 수 있다. 나아가 본 발명의 제1 충전방식과 제2 충전방식중에는 제2 충전방식의 효율이 더 좋았음을 알 수 있다.From this, it can be confirmed that the charging method efficiency of the present invention is improved compared to the prior art. Furthermore, it can be seen that the efficiency of the second charging method is better among the first charging method and the second charging method of the present invention.
한편 본 발명의 제1 충전방식 및 제2 충전방식은 코일체가 수평방향으로 형성되고 있기에, 향상된 수평 충전구조(advanced horizontal approach)라고 할 수 있다. 송신코일이 복수 개가 구비된 구조이다. 이를 일반적인 하나의 송신코일, 비 경사지게 감긴 복수 개의 송신코일, 그리고 본 발명과 같이 경사지게 감기는 복수 개의 송신코일이 적용된 송신부의 효율을 살펴보면, 본 발명의 송신부가 다른 송신코일보다 효율이 높게 나타나고 있다.Meanwhile, in the first charging method and the second charging method of the present invention, since the coil body is formed in a horizontal direction, it can be called an advanced horizontal approach. It has a structure in which a plurality of transmission coils are provided. Looking at the efficiency of a transmitter to which one general transmission coil, a plurality of non-slanted transmission coils, and a plurality of transmission coils wound obliquely as in the present invention are applied, the transmission unit of the present invention has higher efficiency than other transmission coils.
실험 결과에 따른 각 송신부의 효율 성능을 나타낸 지표는 도 7a 및 도 7b에 도시하였다. 이를 보면 송신부의 가로(x축) - 세로(y축) 방향의 전송 효율을 표시하고 있는데 이를 보면 송신부의 전면적이 효율이 균일하게 나타나고 있음을 알 수 있다. 이는 다시 말해 수신부를 송신부의 위치에 상관없이 위치시키더라도 무선충전이 효율적으로 이루어질수 있음을 의미한다고 할 것이다. Indices indicating the efficiency performance of each transmitter according to the experimental results are shown in FIGS. 7A and 7B . This shows the transmission efficiency in the horizontal (x-axis) - vertical (y-axis) direction of the transmitter, and it can be seen that the efficiency appears uniformly over the entire area of the transmitter. In other words, it means that wireless charging can be performed efficiently even if the receiver is positioned regardless of the location of the transmitter.
본 발명은 상기한 송신부를 서로 인접시켜 위치시키면 충전 면적을 자유롭게 확장시키는 것이 가능하다. 관건은 송신부끼리의 간섭이 최소화되어야 하는데, 이는 실험을 통해 확인할 수 있다.According to the present invention, it is possible to freely expand the charging area by locating the transmitting units adjacent to each other. The key is to minimize interference between transmitters, which can be verified through experiments.
앞서 설명한 바와 같이 종래 충전장치(송신부)와 전자기기(수신부)가 수직되게 배치되는 충전방식의 경우, 넓은 충전범위를 원할 경우 복수 개의 코일이 필요하며 이때 코일들을 서로 겹쳐서 배열시켜야만 파워 맥동(power pulsation) 문제를 피할 수 있었다. 그러나 이경우 발열 문제가 불가피하고, 사용되는 코일 개수가 많기 때문에 코일 사이 간격을 최적화하는데 문제가 있다. 충전 범위를 크게 할수록 최적화하는데 어려움이 커져, 실질적으로 넓은 면적에 자유롭게 배치가 가능한 충전장치를 구현할 수 없었다. 예컨대, 도 8은 일정 면적의 충전장치에 송신코일을 약 20개 정도 사용한 예시 도면이지만, 이는 위에서 언급한 문제점들을 그대로 가지고 있어 무선전력을 효과적으로 공급하지 못하였다. As described above, in the case of the charging method in which the conventional charging device (transmitter) and the electronic device (receiver) are vertically arranged, a plurality of coils are required if a wide charging range is desired. ) could have avoided the problem. However, in this case, heat generation is inevitable, and since the number of coils used is large, there is a problem in optimizing the spacing between the coils. As the charging range increases, the difficulty in optimizing increases, so that it is impossible to implement a charging device that can be freely arranged in a practically large area. For example, FIG. 8 is an exemplary diagram in which about 20 transmission coils are used in a charging device of a certain area, but it has the above-mentioned problems as it is, and thus the wireless power cannot be effectively supplied.
반면 본원발명은 코일 개수를 작게하면서도 넓은 면적의 충전이 가능하고 발열문제도 없으며, 코일 상호간의 간섭문제도 없어 최적화가 가능한 효과를 제공하고 있다. 이는 시뮬레이션을 통해 검증하였다.On the other hand, the present invention provides effects that can be optimized because the number of coils is small, charging of a large area is possible, there is no heat problem, and there is no interference problem between the coils. This was verified through simulation.
도 9는 도 3에 도시한 제1 충전방식의 코일체 구조가 적용된 송신부의 기본 구조이다. 도 9a와 같이 페라이트판의 사이즈는 10㎝×10㎝이고, 제1 코일체와 제2 코일체의 폭을 각각 25㎜로 한 경우, 상호 인덕턴스의 변화 시뮬레이션은 도 9b와 같다. 9 is a basic structure of a transmitter to which the coil body structure of the first charging method shown in FIG. 3 is applied. As shown in FIG. 9A , when the size of the ferrite plate is 10 cm×10 cm and the widths of the first coil body and the second coil body are 25 mm, respectively, a simulation of a change in mutual inductance is the same as that of FIG. 9B .
이에 대하여 도 10 및 도 11은 상기 도 9의 기본 구조를 수직방향(y축)과 수평방향(x축)으로 각각 확장한 경우이고, 상호 인덕턴스의 변화 시뮬레이션을 나타내고 있다.In contrast, FIGS. 10 and 11 are cases in which the basic structure of FIG. 9 is expanded in a vertical direction (y-axis) and a horizontal direction (x-axis), respectively, and show simulations of changes in mutual inductance.
도 10a와 같이 기본 구조인 페라이트판을 수직방향으로 연장하더라도 도 10b와 같이 송신코일들 사이의 커플링(coupling)이 크게 나타나지 않아, 상호 인덕턴스의 크기가 균일성(uniformity)에 큰 영향을 미치지 않음을 알 수 있다. 기본 구조보다 확장성이 좋아졌음을 의미한다고 할 수 있다.Even if the ferrite plate, which is the basic structure, is extended in the vertical direction as shown in FIG. 10A, coupling between the transmission coils does not appear significantly as shown in FIG. 10B, so the size of the mutual inductance does not significantly affect the uniformity. can be known It can be said that the scalability is better than the basic structure.
이는 수평방향으로 연장한 경우도 마찬가지이다. 도 11a와 같이 수평방향으로 연장한 결과, 도 11b와 같이 상호 인덕턴스는 증가 및 감소하는 패턴을 보이고 있지만 송신코일들 사이의 커플링(coupling)은 크게 나타나지 않고 있다. 따라서 수평방향으로 연장한 경우도 확장성이 좋아졌다고 볼 수 있다.This is also the case in the case of extending in the horizontal direction. As a result of extending in the horizontal direction as shown in FIG. 11A, the mutual inductance increases and decreases as shown in FIG. 11B, but coupling between the transmission coils does not appear significantly. Therefore, it can be seen that the scalability is improved even when it is extended in the horizontal direction.
이와 같이 본 발명은 무선충전을 위한 충전장치를 전송매질로 공기 대신 강자성체(페라이트판)을 채택하고, 코일이 권선된 코일체를 복수 개 사용하면서 서로 마주보면서 대칭되게 경사지게 배치하거나, 같은 방향으로 나란하게 경사지게 배치시킴으로써, 유효 자기장 크기를 향상시켜 충전장치의 모든 영역에서 동일한 충전 효율을 제공할 수 있음을 알 수 있다. As described above, the present invention adopts a ferromagnetic material (ferrite plate) instead of air as a transmission medium for a charging device for wireless charging, and uses a plurality of coil bodies wound with coils to face each other while facing each other and symmetrically inclined, or side by side in the same direction It can be seen that the same charging efficiency can be provided in all areas of the charging device by improving the effective magnetic field size by arranging it to be slanted.
이상에서는 실시 예들을 참조하여 설명하였지만, 해당 기술 분야의 숙련된 당업자는 하기의 특허 청구의 범위에 기재된 본 발명의 사상 및 영역으로부터 벗어나지 않는 범위 내에서 본 발명을 다양하게 수정 및 변경시킬 수 있음을 이해할 수 있을 것이다.Although the above has been described with reference to the embodiments, those skilled in the art can variously modify and change the present invention within the scope without departing from the spirit and scope of the present invention described in the claims below you will understand
확장된 충전면적에서 자유롭게 충전할 수 있는 무선 충전장치 등에 이용될 수 있다.It can be used for wireless charging devices that can be freely charged in an expanded charging area.

Claims (6)

  1. 소정 사이즈의 강자성체(ferromagnetic substance); 및 a ferromagnetic substance of a predetermined size; and
    상기 강자성체에 설치된 복수 개의 코일체를 포함하고, It includes a plurality of coil bodies installed on the ferromagnetic body,
    상기 코일체는, 코일이 권선된 제1 코일체 및 제2 코일체이고, The coil body is a first coil body and a second coil body on which a coil is wound,
    상기 제1 코일체와 상기 제2 코일체는 상기 강자성체의 좌우 상면 끝단에서 중앙 하면을 향해 경사지면서 배치되는 것을 특징으로 하는 전자기기용 무선 충전장치.The wireless charging device for electronic devices, characterized in that the first coil body and the second coil body are disposed while inclined toward the center lower surface from the left and right upper surface ends of the ferromagnetic material.
  2. 제 1 항에 있어서,The method of claim 1,
    상기 제1 코일체 및 제2 코일체가 서로 마주보는 중앙은 소정 간격 이격설치되는 전자기기용 무선 충전장치.A wireless charging device for electronic devices in which the center of the first coil body and the second coil body facing each other is installed to be spaced apart from each other by a predetermined distance.
  3. 제 1 항에 있어서,The method of claim 1,
    상기 강자성체는 페라이트(ferrite)로 제조되는 전자기기용 무선 충전장치.The ferromagnetic material is a wireless charging device for electronic devices made of ferrite (ferrite).
  4. 소정 사이즈의 강자성체(ferromagnetic or ferrimagnetic substance); 및 a ferromagnetic or ferrimagnetic substance of a predetermined size; and
    상기 강자성체에 설치된 복수 개의 코일체를 포함하고, It includes a plurality of coil bodies installed on the ferromagnetic body,
    상기 복수 개의 코일체는, 상기 강자성체의 상면에서 하면을 향해 동일한 방향으로 서로 평행하게 경사지면서 배치되는 것을 특징으로 하는 전자기기용 무선 충전장치.The plurality of coil bodies, the wireless charging device for electronic devices, characterized in that the ferromagnetic material is disposed while inclined parallel to each other in the same direction from the upper surface to the lower surface.
  5. 제 4 항에 있어서,5. The method of claim 4,
    상기 강자성체는 페라이트(ferrite)로 제조되는 전자기기용 무선 충전장치.The ferromagnetic material is a wireless charging device for electronic devices made of ferrite (ferrite).
  6. 제1항 또는 제4항의 상기 코일체가 설치된 강자성체가 수직방향 또는 수평방향으로 적어도 하나 이상 더 설치되어 충전면적을 확장하는 것을 특징으로 하는 전자기기용 무선 충전장치.[Claim 5] The wireless charging device for electronic devices, characterized in that at least one of the ferromagnetic bodies in which the coil body of claim 1 or 4 is installed is further installed in a vertical or horizontal direction to expand a charging area.
PCT/KR2021/016651 2020-12-09 2021-11-15 Wireless charging apparatus for electronic devices WO2022124611A1 (en)

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