WO2020096342A1 - Tapis de recharge sans fil et dispositif de recharge sans fil - Google Patents

Tapis de recharge sans fil et dispositif de recharge sans fil Download PDF

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Publication number
WO2020096342A1
WO2020096342A1 PCT/KR2019/014963 KR2019014963W WO2020096342A1 WO 2020096342 A1 WO2020096342 A1 WO 2020096342A1 KR 2019014963 W KR2019014963 W KR 2019014963W WO 2020096342 A1 WO2020096342 A1 WO 2020096342A1
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WIPO (PCT)
Prior art keywords
wireless charging
magnetic body
charging pad
magnetic
coil
Prior art date
Application number
PCT/KR2019/014963
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English (en)
Korean (ko)
Inventor
신용환
이병혁
백종석
조용남
Original Assignee
엘지전자 주식회사
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Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2020096342A1 publication Critical patent/WO2020096342A1/fr

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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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/14—Inductive couplings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/28—Coils; Windings; Conductive connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F3/00—Cores, Yokes, or armatures
    • H01F3/10—Composite arrangements of magnetic circuits
    • H01F3/14—Constrictions; Gaps, e.g. air-gaps
    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/01—Frequency selective two-port networks
    • H03H7/0115—Frequency selective two-port networks comprising only inductors and capacitors

Definitions

  • the present invention relates to a wireless charging pad and a wireless charging device.
  • Such a wireless charging system includes several electronic components, including a wireless charging pad and a resonant tank for impedance compensation.
  • the resonant tank is manufactured to be located outside the wireless charging pad.
  • the resonant inductor change the characteristics of the resonant inductor change.
  • Patent Publication No. 10-2007-0050907 (hereinafter referred to as Prior Art Document 1) relates to the integration of a planar transformer or a planar inductor of a power converter, and the planar inductor is composed of a multi-layer substrate composed of electrically insulating and thermally conductive layers.
  • Each layer of Prior Art Document 1 is an electrical layer for forming a planar inductor, one of which is composed of a substrate thermally coupled to a heat sink.
  • the winding is limited to the PCB substrate, and the problem of increasing the volume by using a proprietary magnetic material for the lower ferrite may be generated.
  • Patent Publication No. 10-2013-0143079 (hereinafter referred to as the prior art document 2) is a patent for a thin film type inductor capable of storing large energy per unit area, and a first ferromagnetic yoke (consisting of a magnetic upper section and the following magnetic section) partially surrounding a conductor is Consists of a magnetic top section, a magnetic bottom section, each section is coupled to each other via a low magnetic resistance path in the via region, and includes one or more non-magnetic gaps between the top section and the bottom section.
  • Prior Document 2 proposes an inductor having a thin film-like arm surrounding a conductor, and an arm for reducing magnetic resistance is installed in a path through which magnetic flux around the conductor flows.
  • Prior document 2 forms an inductance with an air core.
  • the structure as in the prior document 2 is difficult to manufacture with a material such as ferrite, and has a limitation in having a high inductance.
  • the wireless charging pad includes a planar inductor in which an inductor coil is disposed between an inner core and an outer core.
  • the planar inductor includes an inner core forming a magnetically closed loop, an outer core surrounding at least a portion of the inner core, and an inductor coil at least partially positioned between the inner core and the outer core. Specific details of other embodiments are included in the detailed description and drawings.
  • the flux-cancellation reduces the magnetic flux value of the magnetic material of the wireless charging pad, thereby reducing the thickness of the magnetic material and reducing the cost.
  • FIG. 1 is a view showing the appearance of a wireless charging system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a wireless charging system according to an embodiment of the present invention.
  • FIG. 3 is a view referred to for describing a wireless charging method according to an embodiment of the present invention.
  • FIG. 4 illustrates an equivalent circuit of a wireless charging pad according to an embodiment of the present invention.
  • FIG 5 is a view referred to for explaining the configuration of a wireless charging pad according to an embodiment of the present invention.
  • FIG. 6 is a plan view of a planar inductor according to an embodiment of the present invention as viewed from a specific direction.
  • FIG. 7 is a side view of a planner inductor according to an embodiment of the present invention.
  • FIG. 8 is a view of a wireless charging pad including a planar inductor according to an embodiment of the present invention as viewed from a specific direction.
  • FIG. 9 is a side view of a wireless charging pad including a planner inductor according to an embodiment of the present invention.
  • FIG. 10 is a side view of a wireless charging pad including a planner inductor according to an embodiment of the present invention.
  • FIG. 11 is a view of a wireless charging pad in which a planar inductor is omitted, viewed from a specific direction.
  • FIG. 12 is a side view of a wireless charging pad with a planar inductor omitted.
  • FIG. 13 is a view of a wireless charging pad including a planar inductor according to an embodiment of the present invention as viewed from a specific direction.
  • FIG. 14 is a side view of a wireless charging pad including a planner inductor according to an embodiment of the present invention.
  • FIG. 1 is a view showing the appearance of a wireless charging system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of a wireless charging system according to an embodiment of the present invention.
  • the wireless charging system 100 may include a power transmitting device 10 and a power receiving device 20.
  • the wireless charging system 100 may be used for wireless charging of an electric vehicle battery, wireless charging of a robot cleaner, wireless charging of a mobile terminal battery, and the like.
  • the power transmission device 10 When the wireless charging system 100 is used for wireless charging of an electric vehicle battery, the power transmission device 10 may be installed in a charging station or the like, and the power receiving device 20 may be provided inside the vehicle. When the wireless charging system 100 is used for wireless charging of the robot cleaner battery, the power transmission device 10 may be configured in a portable format, and the power receiving device 20 may be provided inside the robot cleaner. . When the wireless charging system 100 is used for wireless charging of the mobile terminal battery, the power transmission device 10 may be configured in a portable format, and the power reception device 20 may be provided inside the mobile terminal. .
  • the power transmission device 10 may include an AC / DC converter 11, a DA / AC inverter 12, a resonance tank 13 and a transmission pad 14.
  • the AC / DC converter 11 may convert electrical energy in the form of AC provided from the system 1 into a form of DC.
  • the DC / AC converter 12 converts electrical energy in the form of direct current into electrical energy in the form of alternating current. At this time, the DC / AC converter 12 may generate high-frequency signals of tens to hundreds of kHz.
  • the resonance tank 13 compensates for impedance suitable for wireless charging.
  • the transmission pad 14 transmits electric energy wirelessly.
  • the transmission pad 14 includes a transmission coil 15 therein.
  • the power receiving device 20 may include a receiving pad 21, a resonance tank 22, and a rectifier 23.
  • the receiving pad 21 wirelessly receives electrical energy.
  • the receiving pad 21 includes a receiving coil 25 therein.
  • the transmitting pad 14 and the receiving pad 21 include a coil set (transmitting coil 15 and receiving coil 25) having magnetic coupling.
  • the transmitting pad 14 and the receiving pad 21 transmit electric energy without physical contact between physical electrodes through a magnetic field generated by a high frequency driving signal.
  • the resonance tank 22 compensates for impedance suitable for wireless charging.
  • the rectifier 21 converts the electrical energy in the AC form to the electrical energy in the DC form in order to supply the DC 30 with electrical energy.
  • the battery 30 may be provided in a vehicle, a robot cleaner, or a mobile terminal.
  • FIG. 3 is a view referred to for describing a wireless charging method according to an embodiment of the present invention.
  • the wireless charging system may use an inductive coupling method or a resonance coupling method.
  • inductive Coupling Inductive Coupling, if the intensity of the current flowing through the primary coil (coil) of the two adjacent coils (coil) changes the magnetic field by the current, thereby passing through the secondary coil (coil)
  • the principle is that the magnetic flux changes and the induced electromotive force is generated on the secondary coil side. That is, according to this method, induction electromotive force is generated when only the current of the primary coil is changed while the two coils are brought into proximity without spatially moving the two conductors.
  • the frequency characteristic is not greatly affected, but the alignment and distance between the transmitting device (e.g., wireless charging device) and the receiving device (e.g., mobile terminal) including each coil. According to (Distance), power efficiency is affected.
  • a part of the amount of magnetic field variation generated by applying a resonance frequency to a primary coil among two coils separated by a certain distance is a secondary coil having the same resonance frequency ( coil) to use the principle that induced electromotive force is generated in the secondary coil. That is, according to this method, when the transmitting and receiving devices each resonate at the same frequency, since electromagnetic waves are transmitted through a short-range electromagnetic field, energy transmission is not performed at different frequencies. In this case, the choice of frequency can be an important issue. Since there is no energy transfer between the resonant frequencies spaced apart by a predetermined distance or more, the device to be charged may be selected through the selection of the resonant frequency. If only one device is allocated to one resonance frequency, the selection of the resonance frequency may have a meaning of selecting a device to be charged soon.
  • the resonant coupling method has an advantage in that alignment and distance between a transmitting device and a receiving device including each coil have less influence on power efficiency, compared to an inductive coupling method.
  • FIG. 4 illustrates an equivalent circuit of a wireless charging pad according to an embodiment of the present invention.
  • the wireless charging pad 500 may be used as the transmission pad 14 of the power transmission device 10 or the reception pad 21 of the power reception device 20.
  • the wireless charging pad 500 may be used for wireless charging of a small device such as a mobile terminal, but is preferably used for wireless charging of a large device such as an electric vehicle.
  • the wireless charging pad 500 may be used as a pad 500a for power transmission or a pad 500b for power reception.
  • the power transmission pad 500a may include a resonance tank 13 and a power transmission coil 520a.
  • the power transmission pad 500a may be electrically connected to the power converters 11 and 12.
  • the power converters 11 and 12 may include an AC / DC converter 11 and a DC / AC inverter 12 described with reference to FIG. 2.
  • the power receiving pad 500b may include a resonance tank 22 and a power receiving coil 520b.
  • the power receiving pad 500b may be electrically connected to the rectifier 23.
  • 5 is a view referred to for explaining the configuration of a wireless charging pad according to an embodiment of the present invention.
  • 5 illustrates an exploded perspective view of the wireless charging pad.
  • 5 illustrates the receiving pad 21 by way of example.
  • the transmission pad 14 is based on the ground, only the stacking order of the reception pad 21 is reversed, and the description of FIG. 5 may be applied.
  • the wireless charging pad 500 includes a first case 610, a winding guide 620, at least one transmission / reception coil 520, a first magnetic body 510, an aluminum plate 630, insulation A sheet 640 and a second case 650 may be included.
  • the first case 610 may form an external appearance of the wireless charging pad 500 together with the second case 650.
  • the first case 610 may be combined with the second case 650 to form a space therein.
  • the winding guide 620, the transmission / reception coil 520, the ferrite plate 510, the aluminum plate 630, and the insulating sheet 640 may be accommodated.
  • the winding guide 620, the winding guide 620 may be located inside the transmission / reception coil 520.
  • the winding guide 620 when coupled, can be fixed to the transmitting and receiving coil 520 so that it is fixed and does not move.
  • the winding guide 620 may be formed integrally with the first case 610.
  • the winding guide 620 may be omitted.
  • the transmitting / receiving coil 520 is formed in a spiral shape, so that the overall shape may form a circular, elliptical, or polygonal shape.
  • the winding guide 620 may have a circular, elliptical or polygonal shape so that the transmission / reception coil 520 can be wound in a circular, elliptical or polygonal shape.
  • the transmission / reception coil 520 may be a coil for power transmission.
  • the transmission / reception coil 520 may transmit or receive power wirelessly.
  • the transmission / reception coil 520 may be described as the transmission coil 15.
  • the transmitting / receiving coil 520 may be described as the receiving coil 25.
  • the transmission / reception coil 520 may be formed in a spiral shape. Due to the winding of the transmitting / receiving coil 520, the transmitting / receiving coil 520 may have an overall circular, elliptical, or polygonal appearance.
  • the transmission / reception coil 520 may include an inlet portion and an outlet portion.
  • the first magnetic body 510 may have a circular, elliptical, or polygonal shape.
  • the first magnetic body 510 may be formed of at least one plate. It is preferable to use ferrite as the first magnetic body 510.
  • the first magnetic body 510 may be disposed while being layered with the transmission / reception coil 520.
  • the first magnetic body 510 may be disposed above or below the transmission / reception coil 520.
  • the first magnetic body 510 may be disposed inside the transmission / reception coil 520.
  • the transmitting and receiving coil 520 may be wound around the first magnetic body 510.
  • the insulating sheet 640 can shield unintended currents.
  • the insulating sheet 640 may shield the surface current flowing through the first magnetic body 510.
  • the insulating sheet 640 may shield the capacitor of the resonant tank 530 from being energized with other components in the wireless charging pad 500.
  • the insulating sheet 640 may be positioned between the aluminum plate 630 and the first magnetic body 510.
  • the insulating sheet 640 may be formed of various insulating materials, but is preferably formed of polycarbonate (PC).
  • the aluminum plate 630 can shield the magnetic field.
  • the aluminum plate 630 may shield the magnetic field generated in the process of power transmission and / or power reception from leaking to the outside.
  • the aluminum plate 630 may perform a heat dissipation function.
  • the aluminum plate 630 may induce heat generated from the transmission / reception coil 520 and / or the first magnetic body 510 in the process of power transmission and / or power reception to the outside of the wireless charging pad 500.
  • the aluminum plate 630 may be positioned between the first magnetic body 510 and the second case 650.
  • the aluminum plate 630 may be positioned under the first magnetic body 510.
  • the second case 650 may form an external appearance of the first case 610 and the wireless charging pad 500.
  • the second case 650 may be combined with the first case 610 to form a space therein.
  • FIG. 6 is a plan view of a planar inductor according to an embodiment of the present invention as viewed from a specific direction.
  • 7 is a side view of a planner inductor according to an embodiment of the present invention.
  • the wireless charging pad 500 includes a first magnetic material 510 and a planar inductor (planar) arranged around the transmitting and receiving coil 520, the transmitting and receiving coil 520 to transmit or receive power wirelessly by magnetic coupling (Magnetic coupling) inductor) 700.
  • the planar inductor 700 may be classified into sub-constructions of the resonant tanks 13 and 22 described above.
  • the resonant tanks 13 and 22 include a capacitor and an inductor, and the planar inductor 700 may function as an inductor of the resonant tanks 13 and 22.
  • the inductors of the resonant tanks 13 and 22 are necessary for energy storage.
  • FIG. 6 may be a plan view of the planar inductor from below.
  • FIG. 6 may be a plan view of the planar inductor.
  • the planar inductor 700 may have a flat shape.
  • the planar inductor 700 may be disposed while being layered with the first magnetic body 510.
  • the planar inductor 700 may include an inner core 710, an outer core 720, and an inductor coil 705.
  • the inner core 710 may be formed of a magnetic material.
  • the inner core 710 is preferably formed of ferrite.
  • the inner core 710 may form a closed loop with a ruler.
  • the inner core 710 may be located inside the inductor coil 705.
  • the inner core 710 may have a ring-shaped cross section. In this case, the inner core 710 may be referred to as a ring core.
  • the inner core 710 may be a square core or an E core.
  • the outer core 720 may be formed of a magnetic material.
  • the outer core 720 is preferably formed of ferrite.
  • the outer core 720 may surround at least a portion of the inner core 710.
  • the outer core 720 may be located outside the inductor coil 705.
  • the outer core 720 may have a ring-shaped cross section partially open.
  • the outer core 720 may be a square core or an E core. Meanwhile, an inlet portion and an outlet portion of the inductor coil 705 may be located in the open portion of the outer core 720.
  • the inductor coil 705 may be located at least partially between the inner core 710 and the outer core 720.
  • the winding portion of the inductor coil 705 may be positioned between the inner core 710 and the outer core 720.
  • the winding portion of the inductor coil 705 may be located between the inner core 710 and the outer core 720.
  • the inductor coil 705 may be wound in one direction along the circumference of the outer surface of the inner core 710.
  • At least a portion (eg, an upper surface or a lower surface) of the outer core 720 contacts the first magnetic body 510, and at least a portion of the inner core 710 is a first magnetic body Spaced apart from 510, an air gap 740 may be formed.
  • at least a portion (eg, an upper surface or a lower surface) of the inner core 710 contacts the first magnetic body 510, and at least a portion of the outer core 720 is spaced apart from the first magnetic body 510 Voids can form.
  • the inductance of the planar inductor 700 is correlated with the air gap 740 formed by the inner core 710 being spaced apart from the first magnetic body 510 or the air gap formed by the outer core 720 being spaced apart from the first magnetic body 510.
  • the inductance of the planar inductor 700 may be inversely proportional to the size of the void 740.
  • the inductance of the planar inductor 700 can be inversely proportional to the height of the void 740.
  • the height of the air gap may be defined as a length in the vertical direction.
  • the wireless charging pad 700 may further include a second magnetic body 770.
  • the second magnetic body 770 may contact the inner core 710.
  • the second magnetic body 770 may contact the outer core 720.
  • the inductor planner 700 may be positioned between the first magnetic body 510 and the second magnetic body 770.
  • the planar inductor 700 may form a magnetic closed loop through the inner core 710 and the outer core 720.
  • the first magnetic body 510, the void 740, the inner core 710, the second magnetic body 770, and the outer core 720 may form a magnetic path.
  • the magnetic flux 730 may flow along the formed magnetic path to form a magnetic closed loop.
  • the magnetic flux formed by the transmission / reception coil 520 and flowing through the first magnetic body 510 may be canceled by the magnetic flux 730 formed by the planar inductor 700.
  • a groove may be formed in at least one of the first magnetic body 510 and the second magnetic body 770. At least a portion of the inlet portion of the inductor coil 705 may be seated in the groove. As illustrated in FIG. 6, a groove 750 in which at least a portion of an inlet portion of the inductor coil 705 is seated may be formed in the first magnetic body 510. As illustrated in FIG. 7, a groove 751 in which at least a portion of the inlet portion of the inductor coil 705 is seated may be formed in the second magnetic body 770.
  • the volume increase of the wireless charging pad can be eliminated by the inlet portion.
  • the appearance of the wireless charging pad can be kept flat.
  • the inductor coil 705 may be composed of a lead portion, a winding portion, and a lead portion.
  • the lead-in portion may be defined as a portion where current flows through the inductor coil 705.
  • the lead-in portion may be described as a straight or curved portion of the inductor coil 705 that is not wound.
  • One end of the lead-in portion may be electrically connected to the electronic component.
  • the winding portion may be described as a portion where the coil is wound in one direction and has a spiral shape.
  • the winding portion may be wound in one direction along the circumference of the outer surface of the inner core 710.
  • the winding portion can be extended from the lead-in portion.
  • the lead portion may be defined as a portion through which current flows from the inductor coil 705.
  • the lead portion may be described as a portion of the inductor coil 705 that is not wound or has a straight or curved portion.
  • One end of the lead-out portion may be electrically connected to the electronic component.
  • the winding direction of the coil of the inductor coil 705 may be a direction opposite to the winding direction of the coil of the transmission / reception coil 520.
  • the inductor coil 705 may be configured in a printed circuit board (PCB) pattern.
  • PCB printed circuit board
  • the bobbins of the inner core 710 and the outer core 720 may also be manufactured.
  • the bobbin and the PCB can fix the inner core 710 and the outer core 720.
  • the inductor coil 705 is composed of a PCB pattern, a heat dissipation structure is better than that of a wire, and a higher current mill can be used than that of a wire.
  • the wireless charging pad 500 can be formed of a multi-layer substrate, thereby solving the problem of overlapping the inlet.
  • the inner core 710, the outer core 720, and the second magnetic body 770 may be integrally formed.
  • FIG. 8 is a view of a wireless charging pad including a planar inductor according to an embodiment of the present invention as viewed from a specific direction.
  • 9 is a side view of a wireless charging pad including a planner inductor according to an embodiment of the present invention.
  • 10 is a side view of a wireless charging pad including a planner inductor according to an embodiment of the present invention. For convenience of description, only a portion of the wireless charging pad is shown in each drawing.
  • the wireless charging pad 500 may further include a winding guide 620.
  • the winding guide 620 is located inside the transmission / reception coil 520 and can guide coil winding of the transmission / reception coil 520.
  • the transmitting and receiving coil 520 may be wound in one direction along the circumference of the outer side of the winding guide 620.
  • the winding guide is preferably formed of polycarbonate (PC) to shield unintentional current.
  • the wireless charging pad 500 does not include a separate winding guide 620, and the planner inductor 700 can function as a winding guide.
  • the planner inductor 700 can guide coil winding of the transmission / reception coil 520.
  • the transmitting and receiving coil 520 may be wound in one direction along the circumference of the outer side of the planar inductor 700.
  • an insulator may be disposed between the planar inductor 700 and the transmit / receive coil 520. The insulator shields the unintended current and may be formed of various insulating materials, but is preferably formed of polycarbonate (PC).
  • PC polycarbonate
  • the first magnetic body 510 may be disposed while being layered with the winding guide 620 and the transmission / reception coil 520.
  • the first magnetic body 510 may be positioned on the winding guide 620.
  • the first magnetic body 510 may be located on the transmission / reception coil 520.
  • the planar inductor 700 may be disposed while being layered with the first magnetic body 510.
  • the planar inductor 700 may be disposed on the first magnetic body 510.
  • the magnetic flux generated by the planar inductor 700 flows as indicated by reference numeral 730.
  • the main magnetic flux of the power transmission by the transmission / reception coil 520 flows as indicated by reference numeral 790. Since the magnetic flux 730 by the planar inductor 700 and the magnetic flux by the transmission / reception coil 520 flow in opposite directions, flux-cancellation occurs and the maximum magnetic flux density of the first magnetic body 510 decreases. Since the planar inductor 700 and the transmitting / receiving coil 520 share the first magnetic material 510, the planar inductor 700 forms a magnetic closed loop, so even if the offset of the transmitting / receiving pad changes, the characteristics of the inductor do not change. Does not. Accordingly, the inductance of the planar inductor 700 can be derived through the following equation.
  • N is the number of turns
  • B is the magnetic flux density (peak value)
  • A is the inner cross-sectional area of the inner core
  • I is the current (peak value)
  • the designed inductance can be derived by adjusting the height of the air gap 740.
  • 11 is a view of a wireless charging pad in which a planar inductor is omitted, viewed from a specific direction.
  • 12 is a side view of a wireless charging pad with a planar inductor omitted. For convenience of description, the drawing shows only a part of the wireless charging pad.
  • FIGS. 11 to 12 illustrate the receiving pad 21 by way of example.
  • the transmission pad 14 is based on the ground, only the stacking order of the reception pad 21 and each component is reversed, and the description with reference to FIGS. 11 to 12 may be applied.
  • FIG. 11 is a bottom view of a wireless charging pad according to an embodiment of the present invention
  • FIG. 12 is a side view viewed from the direction of the arrow in FIG. 11.
  • the wireless charging pad 500 may further include a third magnetic body 512. At least a portion of the third magnetic body 512 may contact at least a portion of the first magnetic body 510.
  • the first magnetic body 510 may be disposed while being layered with the third magnetic body 512.
  • the first magnetic body 510 may be stacked on the third magnetic body 512 or the third magnetic body 512 may be stacked on the first magnetic body 510. At least a portion of the first magnetic body 510 may contact at least a portion of the third magnetic body 512.
  • the first magnetic body 510 may be disposed on the same layer (layer) as the transmission / reception coil 520. At least a portion of the first magnetic body 510 may overlap the space 513 surrounded by the third magnetic body 512 in the vertical direction.
  • the third magnetic body 512 may be disposed while being layered with the first magnetic body 510. At least a portion of the third magnetic body 512 may contact at least a portion of the first magnetic body 510. By contacting the third magnetic body 512 and the first magnetic body 512, a curb path to be cured may be formed in the first magnetic body 510 and the third magnetic body 512.
  • the third magnetic body 512 may provide a space 513 in which at least one electronic component is accommodated. Due to the continuous magnetic paths formed in the first magnetic body 510 and the third magnetic body 512, the eddy current is not applied to the electronic components accommodated inside the third magnetic body 512, and thus the EMC effect is minimized. No heat is generated by the magnetic field in the part. At least a portion of the space 513 of the third magnetic body 512 may overlap the first magnetic body 510 in the vertical direction.
  • the electronic component may include at least one of a converter, an inverter, a rectifier, and a resonant tank.
  • the electronic component may include at least one of the resonant tank 22 and the rectifier 23.
  • the wireless charging pad 500 functions as the transmission pad 14
  • the electronic component includes at least any one of the AC / DC converter 11, the DC / AC inverter 12, and the resonant tank 13 It can contain one.
  • the electronic component may be the planar inductor 700 described above.
  • the positional relationship of the first magnetic body 510, the third magnetic body 512, and the transmission / reception coil 520 may be described based on the layer.
  • the first layer 531 may be described as a different layer from the second layer 532. As illustrated in FIG. 12, the second layer 532 may be positioned on the first layer 531 in an upward direction from the ground. According to an embodiment, the first layer 531 may be positioned on the second layer 532 in an upward direction from the ground.
  • the first magnetic body 510 and the transmission / reception coil 520 may be positioned on the first layer 531.
  • the third magnetic body 512 may be located on the second layer. In this way, the first magnetic body 510, the transmitting and receiving coil 520 and the third magnetic body 512 are positioned, so that the third magnetic body 512 is disposed in a layer with the first magnetic body 510 and the transmitting and receiving coil 520. Can be.
  • the space 513 of the third magnetic body 512 may be located on the second layer 532. Accordingly, the electronic component positioned in the space 513 is positioned in the second layer 532. In this case, the planar inductor 700 disposed in the space 513 may be located in the second layer 532.
  • the transmission / reception coil 520 may be wound around the first magnetic body 510.
  • the wireless charging pad 500 may further include an insulator.
  • the insulator may be disposed between the first magnetic body 510 and the transmission / reception coil 520.
  • the insulator is formed to surround the first magnetic body 510, and the transmission / reception coil 520 may be wound in a form surrounding the insulator.
  • the insulator is preferably formed of polycarbonate.
  • the transmission / reception coil 520 may be positioned above or below the third magnetic body 512.
  • the third magnetic body 512 may include a plurality of sub magnetic bodies 512a, 512b, 512c, and 512d.
  • the plurality of sub magnetic materials may be arranged to be spaced apart from each other at a predetermined distance. At least a portion of each of the plurality of sub magnetic bodies 512a, 512b, 512c, and 512d may contact at least a portion of the first magnetic body 510. At least a portion of the first magnetic body 510 may contact a portion of each of the plurality of sub magnetic bodies 512a, 512b, 512c, and 512d.
  • the magnetic flux entering from the outer shell to the plurality of sub-magnets 512a, 512b, 512c, and 512d does not flow at intervals between the plurality of sub-magnets 512a, 512b, 512c, and 512d whose reluctance is infinite, and the first magnetic body 510 Flows into Accordingly, the amount of leakage magnetic flux is significantly reduced.
  • the first magnetic body 510 and the third magnetic body 512 are disposed in a layered manner, at least a portion of the third magnetic body 512 contacts at least a portion of the first magnetic body 510, and thus the third magnetic body 512 The magnetic flux flowing into the inner space 513 is reduced.
  • the transmission / reception coil 520 may include a lead-in portion 521 and a lead-out portion 522.
  • the lead-in portion 521 and the lead-out portion 522 of the transmission / reception coil 520 may be positioned at a gap formed between the plurality of sub-magnetic materials.
  • the first internal impedance value viewed in the direction of the arrows in the inlet unit 521 and the inlet unit 522 is the inlet unit 521 in the state in which the electronic component is not disposed. It is smaller than the second internal impedance value as viewed from the overdrawing unit 522.
  • the internal impedance value is reduced because the inductance of the transmission / reception coil 520 is canceled by the capacitance of the resonance tanks 13 and 22.
  • FIG. 13 is a view of a wireless charging pad including a planar inductor according to an embodiment of the present invention as viewed from a specific direction.
  • 14 is a side view of a wireless charging pad including a planner inductor according to an embodiment of the present invention. For convenience of description, the drawing shows only a part of the wireless charging pad.
  • the planar inductor 700 as an electronic component may be located in the space 513 provided by the third magnetic body 512. 13 to 14, the transmission / reception coil 520 may be wound around the first magnetic body 510. The planar inductor 700 may be positioned on the first magnetic body 510.
  • the wireless charging pad 500 may further include a third magnetic body 512 at least partially contacting at least a portion of the first magnetic body 510.
  • the contents described with reference to FIGS. 11 to 12 may be applied to the third magnetic body 512.
  • the third magnetic body 512 may be disposed spaced apart from the outer surface of the planar inductor 700.
  • the magnetic flux 790 formed by the transmission / reception coil 520 and flowing through the first magnetic body 510 and the third magnetic body 512 may be canceled by the magnetic flux 730 formed by the planar inductor 700. have.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

La présente invention concerne un tapis de recharge sans fil comprenant : une bobine d'émission/réception pour émettre ou recevoir de l'énergie sans fil; un premier corps magnétique agencé autour de la bobine d'émission/réception; et une bobine d'induction plane agencée pour être stratifiée avec le corps magnétique, la bobine d'induction plane comprenant un noyau interne pour former une boucle fermée de chemin magnétique; un noyau externe entourant au moins une partie du noyau interne; et une bobine d'induction dont au moins une partie est positionnée entre le noyau interne et le noyau externe.
PCT/KR2019/014963 2018-11-06 2019-11-06 Tapis de recharge sans fil et dispositif de recharge sans fil WO2020096342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2018-0135112 2018-11-06
KR1020180135112A KR20200052033A (ko) 2018-11-06 2018-11-06 무선 충전 패드 및 무선 충전 장치

Publications (1)

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WO2020096342A1 true WO2020096342A1 (fr) 2020-05-14

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KR (1) KR20200052033A (fr)
WO (1) WO2020096342A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014397A1 (fr) * 1998-12-15 2000-06-28 Alcatel Réactance à champ de dispersion fort pour convertisseur de puissance à commutation
JP2002158123A (ja) * 2000-11-22 2002-05-31 Tokin Corp 薄膜プレーナー型インダクタおよびその製造方法
EP1211701A1 (fr) * 2000-12-04 2002-06-05 C.R.F. Società Consortile per Azioni Inducteur plan à noyau ferromagnétique et son procédé de fabrication
KR20130101245A (ko) * 2012-03-05 2013-09-13 엘지이노텍 주식회사 무선전력 송신장치
KR101732944B1 (ko) * 2015-11-11 2017-05-08 주식회사 이엠따블유 복합 페라이트 자기장 차폐시트, 이의 제조방법 및 이를 이용한 안테나 모듈

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1014397A1 (fr) * 1998-12-15 2000-06-28 Alcatel Réactance à champ de dispersion fort pour convertisseur de puissance à commutation
JP2002158123A (ja) * 2000-11-22 2002-05-31 Tokin Corp 薄膜プレーナー型インダクタおよびその製造方法
EP1211701A1 (fr) * 2000-12-04 2002-06-05 C.R.F. Società Consortile per Azioni Inducteur plan à noyau ferromagnétique et son procédé de fabrication
KR20130101245A (ko) * 2012-03-05 2013-09-13 엘지이노텍 주식회사 무선전력 송신장치
KR101732944B1 (ko) * 2015-11-11 2017-05-08 주식회사 이엠따블유 복합 페라이트 자기장 차폐시트, 이의 제조방법 및 이를 이용한 안테나 모듈

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