KR20180042032A - Apparatus for repeatting and transmitting of wireless power transfer system - Google Patents

Abstract

The present invention relates to wireless power repeater and transmitter in a wireless power transmission system. The wireless power repeater according to an embodiment of the present invention can comprise: a screw bolt shaped housing; a shielding member disposed inside the housing; a relay coil wound around the shielding member; and a capacitor disposed in the shielding material. According to the present invention, the wireless power repeater and transmitter can be installed at any place.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless power repeater and a transmitter in a wireless power transmission system,

The present invention relates to an electrolone power repeater and a wireless power transmitter in a wireless power transmission system.

Portable terminals, such as mobile phones and laptops, include a battery for storing power and a circuit for charging and discharging the battery. In order for the battery of such a terminal to be charged, power must be supplied from an external charger.

2. Description of the Related Art [0002] Generally, as an example of an electrical connection between a charging device and a battery for charging electric power of a battery, a commercial electric power is supplied to a terminal for converting electric power into voltage and current corresponding to the battery, Supply method. This type of terminal supply is accompanied by the use of physical cables or wires. Therefore, when handling a lot of terminal-supplied equipment, many cables occupy considerable work space, are difficult to organize, and are not well apparent. Also, the terminal supply method may cause problems such as instantaneous discharge due to different potential difference between terminals, burnout due to foreign substances, fire, natural discharge, battery life and deterioration of performance.

In order to solve such a problem, a charging system (hereinafter referred to as a "wireless charging system") and a control method using a method of transmitting power wirelessly are proposed. In addition, since the wireless charging system has not been installed in some portable terminals in the past and the consumer has to purchase a separate wireless charging receiver accessory, the demand for the wireless charging system is low, but the wireless charging user is expected to increase rapidly. Wireless charging function is expected to be equipped basically.

Generally, a wireless charging system comprises a wireless power transmitter for supplying electric energy in a wireless power transmission mode and a wireless power receiver for receiving electric energy supplied from a wireless power transmitter to charge the battery.

Such a wireless charging system may transmit power by at least one wireless power transmission scheme (e.g., electromagnetic induction scheme, electromagnetic resonance scheme, RF wireless power transmission scheme, etc.).

For example, the wireless power transmission scheme may be based on a variety of wireless power transmission standards based on an electromagnetic induction scheme in which a magnetic field is generated in a power transmitter coil and charged using an electromagnetic induction principle in which electricity is induced in a receiver coil under the influence of its magnetic field . Here, the electromagnetic induction type wireless power transmission standard may include an electromagnetic induction wireless charging technique defined in a Wireless Power Consortium (WPC) or a Power Matters Alliance (PMA).

In another example, the wireless power transmission scheme may employ an electromagnetic resonance scheme in which the magnetic field generated by the transmission coil of the wireless power transmitter is tuned to a specific resonance frequency to transmit power to a nearby wireless power receiver . Here, the electromagnetic resonance method may include a resonance-type wireless charging technique defined in the Alliance for Wireless Power (A4WP) standard mechanism, a wireless charging technology standard mechanism.

In another example, a wireless power transmission scheme may use an RF wireless power transmission scheme that transmits power to a wireless power receiver located at a remote location by applying low-power energy to the RF signal.

Meanwhile, the wireless charging system can utilize a wireless power repeater to extend the power transmission distance of the wireless power transmitter or to make power transmission more efficient. However, there has been a space limitation such as a place for installing a wireless power repeater or a wireless power transmitter.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless power repeater and a transmitter in a wireless power transmission system.

The present invention also provides a wireless power repeater and transmitter in a wireless power transmission system that is not limited to a place of installation.

The present invention also provides a wireless power repeater and transmitter in a wireless power transmission system that is simple to install.

The present invention also provides a wireless power repeater and transmitter in a wireless power transmission system in which a wireless recharging receiver can receive power anywhere.

The present invention also provides a wireless power repeater and a transmitter in a wireless power transmission system for increasing the charging efficiency of a wireless charging receiver.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, unless further departing from the spirit and scope of the invention as defined by the appended claims. It will be possible.

According to an aspect of the present invention, there is provided a wireless power repeater including: a housing having a screw-bolt shape; A shielding member disposed inside the housing; A relay coil wound around the shield member; And a capacitor disposed in the shielding material.

According to another embodiment of the present invention, the housing further includes a head portion and a body portion, and the body portion may include a column portion and a thread protruding from the column portion.

In the wireless power repeater according to another embodiment, the body may be divided into a first region in which a thread is disposed and a second region in which a thread is not disposed.

In a wireless power repeater according to another embodiment, the head may include a groove.

In a wireless power repeater according to another embodiment, the relay coil is disposed inside the housing and may be stacked while surrounding the shielding material.

In a wireless power repeater according to another embodiment, the relay coil is disposed inside the housing and may be disposed in a solenoid form.

In a wireless power repeater according to another embodiment, the relay coil may be disposed within the thread.

According to another embodiment of the present invention, the body portion further includes a threaded portion between the threads, and the relay coil is disposed outside the housing and may be disposed on the threaded portion while surrounding the body portion.

A wireless power repeater according to another embodiment further comprises an attachment member for engaging the housing, the attachment member comprising a frame having a side wall and a bottom surface disposed thereon, and a second thread protruding from the frame, have.

According to another embodiment of the present invention, the body further includes a point portion, and the body portion includes a first region in which the thread is disposed and a second region in which the pole portion is narrowed while being extended to the point portion in the first region .

As another solution to the above-mentioned problem, there is provided a power supply unit including a screw bolt-shaped housing, a shield member disposed inside the housing, a power transmission unit including a transmission coil and a drive circuit wound around the shield member; And a circuitry for providing power to the power transfer unit.

According to another embodiment of the present invention, the housing further includes a head portion and a body portion, and the body portion may include a column portion and a thread protruding from the column portion.

In the wireless power transmitter according to another embodiment, the body may be divided into a first region in which a thread is disposed and a second region in which a thread is not disposed.

In a wireless power transmitter according to another embodiment, the head may include a groove.

In a wireless power transmitter according to another embodiment, the transmitting coil may be disposed inside the housing and may be stacked while surrounding the shielding material.

In a wireless power transmitter according to another embodiment, the transmitting coil is disposed inside the housing and may be disposed in a solenoid form.

In a wireless power transmitter according to another embodiment, the transmitting coil may be disposed within the thread.

According to another embodiment of the present invention, the body may further include a threaded portion between the threads, and the transmission coil may be disposed outside the housing, and may be disposed on the threaded portion while surrounding the body.

The wireless power transmitter according to yet another embodiment further comprises an attachment member for engaging the housing, the attachment member may include a frame having a side wall and a bottom surface disposed thereon, and a second thread protruding from the frame have.

According to yet another embodiment, the wireless power transmitter further comprises a first input power supply gate electrically connected to the driver circuit and disposed at a lower end of the body, the mounting member being disposed at an upper end of the bottom surface And a second input power supply gate for providing the power provided by the circuitry to the first input power supply gate.

The effect of the wireless power repeater and the transmitter in the wireless power transmission system according to the present invention will be described as follows.

First, the present invention can be installed in a place where a wireless power repeater or a transmitter is installed without limitation.

Second, the present invention simplifies the installation of a wireless power repeater or transmitter.

Third, the present invention allows the wireless recharging receiver to receive power anywhere by a wireless power repeater or transmitter.

Fourth, the present invention can increase the charging efficiency of the wireless recharging receiver by the wireless power repeater or the transmitter.

Fifth, the present invention can have a wider charging area by using a plurality of transmission coils, thereby improving user convenience.

Sixth, the present invention can use only one of a plurality of identical circuits, so that the size of the wireless power transmitter itself can be reduced, and parts used are reduced, thereby reducing the cost.

Seventh, the present invention can utilize the component elements defined in the published wireless power transmission standard, and can follow the already defined standard.

The effects obtained by the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description will be.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. It is to be understood, however, that the technical features of the present invention are not limited to the specific drawings, and the features disclosed in the drawings may be combined with each other to constitute a new embodiment.
1 is a block diagram illustrating a wireless charging system according to an embodiment.
2 is a block diagram illustrating a wireless charging system according to another embodiment.
3 is a diagram for explaining a sensing signal transmission procedure in a wireless charging system according to an embodiment.
4 is a state transition diagram for explaining the wireless power transmission procedure defined in the WPC standard.
5 is a state transition diagram for explaining the wireless power transmission procedure defined in the PMA standard.
6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.
7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to the FIG.
8 is a diagram for explaining a packet format according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
FIG. 9 is a diagram for explaining the kinds of packets that the wireless power receiving apparatus according to the electromagnetic induction type wireless power transmission procedure according to one embodiment can transmit in the ping stage.
10 is a diagram for explaining a message format of an identification packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
11 is a diagram for explaining a message format of a configuration packet and a power control hold packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
FIG. 12 is a diagram for explaining a type of a packet that can be transmitted in a power transmission step and a message format thereof by a wireless power receiving apparatus according to an electromagnetic induction wireless power transmission procedure according to an embodiment.
13 is a diagram for explaining three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils according to an embodiment.
14 illustrates a wireless power transmitter including a plurality of coils and one drive circuit according to one embodiment.
15 is a diagram for explaining a drive circuit including a full-bridge inverter according to an embodiment.
16 is a view for explaining a plurality of switches connecting any one of a plurality of transmission coils to a drive circuit according to an embodiment.
17 is a block diagram for explaining a wireless charging system according to another embodiment.
18 is a circuit diagram for explaining a wireless power repeater including a relay coil according to yet another embodiment.
19 is a side view of a wireless power repeater in accordance with one embodiment.
20 is a top view of a wireless power repeater in accordance with one embodiment.
21 is a cross-sectional view of a wireless power repeater in accordance with one embodiment.
22 is a cross-sectional view of a wireless power repeater according to another embodiment.
23 is a cross-sectional view of a wireless power repeater according to yet another embodiment.
24 is a diagram for explaining a state in which a wireless power repeater according to an embodiment is installed.
25 is a view for explaining a state in which a wireless power repeater according to another embodiment is installed.
26 is a side view of a wireless power repeater in accordance with another embodiment.
27 is a side view of a power transmission portion of a wireless power transmitter in accordance with an embodiment.
28 is a cross-sectional view of a power transmission portion of a wireless power transmitter in accordance with one embodiment.
29 is a cross-sectional view of a power transmission portion of a wireless power transmitter according to another embodiment.
30 is a cross-sectional view of a power transmission portion of a wireless power transmitter according to yet another embodiment.
31 is a view for explaining a state in which a wireless power transmitter according to an embodiment is installed.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which the embodiments are applied will be described in detail with reference to the drawings. The suffix "module" and " part "for the components used in the following description are given or mixed in consideration of ease of specification, and do not have their own meaning or role.

The present invention is not necessarily limited to these embodiments, as long as all of the constituent elements of the embodiment are described as being combined or operated together. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. In addition, although all of the components may be implemented as one independent hardware, some or all of the components may be selectively combined to perform a part or all of the functions in one or a plurality of hardware. As shown in FIG. The codes and code segments constituting the computer program may be easily deduced by those skilled in the art. Such a computer program may be stored in a computer-readable storage medium, readable and executed by a computer, thereby realizing embodiments. As the storage medium of the computer program, a magnetic recording medium, an optical recording medium, a carrier wave medium, or the like may be included.

In the description of the embodiment, in the case of being described as being formed on the "upper or lower", "before" or "after" of each component, (Lower) "and" front or rear "encompass both that the two components are in direct contact with each other or that one or more other components are disposed between the two components.

It is also to be understood that the terms such as " comprises, "" comprising," or "having ", as used herein, mean that a component can be implanted unless specifically stated to the contrary. But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

In the description of the embodiments, an apparatus for transmitting wireless power on a wireless power charging system includes a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, a transmitter, a wireless power transmitter, a wireless power transmitter , A wireless charging device, or the like. In addition, a wireless power receiving device, a wireless power receiver, a receiving end, a receiver, a receiving terminal, a receiving side, a receiving device, a receiver terminal, and the like are mixed for convenience of explanation in the expression for a device for receiving wireless power from a wireless power transmission device Can be used. In addition, for the sake of convenience of explanation, a description will be made of an apparatus for receiving wireless power from a wireless power transmission apparatus and relaying wireless power to the wireless power reception apparatus. For convenience of explanation, the wireless power relay apparatus, relay node, repeater, relay apparatus, A repeater, an intermediate terminal, a repeater terminal, or the like can be used in combination.

The wireless charging device according to the embodiment may be configured as a screw bolt type, a ceiling embedded type, a side wall embedded type, a desk embedded type, a chair embedded type, a table embedded type, a wall type, Power may be transmitted to the device.

A mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), a navigation device, an MP3 player, (Hereinafter referred to as a " device ") capable of charging a battery by mounting a wireless power receiving means according to an embodiment, but not limited thereto, may be used for a small electronic device such as a toothbrush, an electronic tag, a lighting device, Quot;), and the term terminal or device may be used in combination. A wireless power receiver according to another embodiment may also be mounted on a vehicle, an unmanned aerial vehicle, an air drone or the like.

A wireless power receiver according to an embodiment may include at least one wireless power transmission scheme and may receive wireless power from two or more wireless power transmitters at the same time. The wireless power receiver may also receive wireless power from one or more wireless power relays simultaneously. Here, the wireless power transmission scheme may include at least one of the electromagnetic induction scheme, the electromagnetic resonance scheme, and the RF wireless power transmission scheme. In particular, the wireless power receiving means for supporting the electromagnetic induction method may include an electromagnetic induction wireless charging technique defined by Wireless Power Consortium (WPC) and Power Matters Alliance (PMA). In addition, the wireless power receiving means for supporting the electromagnetic resonance method may include a resonance wireless charging technique defined in the A4WP (Alliance for Wireless Power) standard mechanism, which is a standard wireless charging technology standard.

Generally, a wireless power transmitter and a wireless power receiver that constitute a wireless power system can exchange control signals or information through in-band communication or Bluetooth low energy (BLE) communication. Here, the in-band communication and the BLE communication can be performed by a pulse width modulation method, a frequency modulation method, a phase modulation method, an amplitude modulation method, an amplitude and phase modulation method, and the like. For example, the wireless power receiver can transmit various control signals and information to the wireless power transmitter by generating a feedback signal by switching on / off the current induced through the reception coil in a predetermined pattern. The information transmitted by the wireless power receiver may include various status information including received power intensity information. At this time, the wireless power transmitter can calculate the charging efficiency or the power transmission efficiency based on the received power intensity information.

1 is a block diagram illustrating a wireless charging system according to an embodiment.

Referring to FIG. 1, the wireless charging system includes a wireless power transmitter 10 that wirelessly transmits power, a wireless power receiver 20 that receives the transmitted power, and an electronic device 30 that receives power Lt; / RTI >

For example, the wireless power transmitter 10 and the wireless power receiver 20 may perform in-band communication in which information is exchanged using the same frequency band as that used for wireless power transmission. In another example, the wireless power transmitter 10 and the wireless power receiver 20 may use out-of-band communication to exchange information using a separate frequency band that is different from the operating frequency used for wireless power transmission .

As an example, information exchanged between the wireless power transmitter 10 and the wireless power receiver 20 may include control information as well as status information of each other. Here, the status information and control information exchanged between the transceivers will become more apparent through the description of the embodiments to be described later.

The in-band communication and the out-of-band communication may provide bidirectional communication, but the present invention is not limited thereto. In another embodiment, the in-band communication and the out-of-band communication may be provided.

 In one example, the unidirectional communication may be that the wireless power receiver 20 only transmits information to the wireless power transmitter 10, but the wireless power transmitter 10 is not limited to this, Lt; / RTI >

In the half duplex communication mode, bi-directional communication is possible between the wireless power receiver 20 and the wireless power transmitter 10, but information can be transmitted only by any one device at any time.

The wireless power receiver 20 according to one embodiment may obtain various status information of the electronic device 30. [ For example, the status information of the electronic device 30 may include current power usage information, information for identifying a running application, CPU usage information, battery charge status information, battery output voltage / current information, And is information obtainable from the electronic device 30 and available for wireless power control.

In particular, the wireless power transmitter 10 according to one embodiment may transmit a predetermined packet to the wireless power receiver 20 indicating whether to support fast charging. The wireless power receiver 20 can notify the electronic device 30 if the connected wireless power transmitter 10 is determined to support the fast charge mode. The electronic device 30 may indicate that fast charging is possible through a predetermined display means, which may be, for example, a liquid crystal display.

In addition, the user of the electronic device 30 may select a predetermined fast charge request button displayed on the liquid crystal display means to control the wireless power transmitter 10 to operate in the fast charge mode. In this case, the electronic device 30 may transmit a predetermined fast charge request signal to the wireless power receiver 20 when the quick charge request button is selected by the user. The wireless power receiver 20 can generate a charging mode packet corresponding to the received fast charging request signal and send it to the wireless power transmitter 10 to switch the normal low power charging mode to the fast charging mode.

2 is a block diagram illustrating a wireless charging system according to another embodiment.

For example, as shown in 200a, the wireless power receiver 20 may be configured with a plurality of wireless power receiving devices, wherein a plurality of wireless power receiving devices are connected to one wireless power transmitter 10, Charging may also be performed. In this case, the wireless power transmitter 10 may distribute power to a plurality of wireless power receiving apparatuses in a time division manner, but the present invention is not limited thereto. For example, the wireless power transmitter 10 may transmit Power can be distributed and transmitted to a plurality of wireless power receiving apparatuses using different allocated frequency bands.

At this time, the number of wireless power receiving apparatuses connectable to one wireless power transmitting apparatus 10 is set to at least one of the required power amount for each wireless power receiving apparatus, the battery charging state, the power consumption amount of the electronic apparatus, Can be determined adaptively based on

As another example, as shown in FIG. 200B, the wireless power transmitter 10 may be composed of a plurality of wireless power transmission devices. In this case, the wireless power receiver 20 may be coupled to a plurality of wireless power transmission devices at the same time, and may receive power from the connected wireless power transmission devices at the same time to perform charging. At this time, the number of wireless power transmission apparatuses connected to the wireless power receiver 20 may be adaptively calculated based on the required power amount of the wireless power receiver 20, the battery charging status, the power consumption amount of the electronic apparatus, Can be determined.

3 is a diagram for explaining a sensing signal transmission procedure in a wireless charging system according to an embodiment.

As an example, the wireless power transmitter may be equipped with three transmit coils 111, 112, 113. Each transmit coil may overlap a portion of the transmit coil with a different transmit coil, and the wireless power transmitter may include a predetermined sense signal 117, 127 for sensing the presence of the wireless power receiver through each transmit coil - And sequentially transmits digital ping signals in a predefined order.

As shown in FIG. 3, the wireless power transmitter sequentially transmits the detection signal 117 through the primary sensing signal transmission procedure shown in reference numeral 110, and receives a signal strength indicator (Signal Strength Indicator 116 (or signal strength packet) may be received. Subsequently, the wireless power transmitter sequentially transmits the detection signal 127 through the secondary detection signal transmission procedure shown in the reference numeral 120, and the signal strength indicator 126 is transmitted to the transmission coils 111 and 112 It is possible to control the efficiency (or charging efficiency) - that is, the state of alignment between the transmitting coil and the receiving coil - to identify a good transmitting coil and to allow power to be delivered through the identified transmitting coil, .

As shown in FIG. 3, the reason why the wireless power transmitter performs the two detection signal transmission procedures is to more accurately identify to which transmission coil the reception coil of the wireless power receiver is well aligned.

If the signal strength indicators 116 and 126 are received at the first transmission coil 111 and the second transmission coil 112 as shown in the aforementioned numerals 110 and 120 of FIG. 3, Selects a transmission coil having the best alignment based on the received signal strength indicator 126 in each of the first transmission coil 111 and the second transmission coil 112 and performs wireless charging using the selected transmission coil .

4 is a state transition diagram for explaining the wireless power transmission procedure defined in the WPC standard.

Referring to FIG. 4, power transmission from a transmitter to a receiver according to the WPC standard is largely divided into a selection phase 410, a ping phase 420, an identification and configuration phase 430, And a power transfer phase (step 440).

The selection step 410 may be a phase transition when a specific error or a specific event is detected while initiating a power transmission or maintaining a power transmission. Here, the specific error and the specific event will become clear through the following description. Also, in a selection step 410, the transmitter may monitor whether an object is present on the interface surface. If the transmitter detects that an object is placed on the interface surface, it can transition to the step 420 (S401). In the selection step 410, the transmitter transmits an analog ping signal of a very short pulse and can detect whether an object exists in the active area of the interface surface based on the current change of the transmission coil.

In step 420, the transmitter activates the receiver when an object is sensed, and transmits a digital ping to identify whether the receiver is a WPC compliant receiver. If the transmitter does not receive a response signal for the digital ping (e.g., a signal strength indicator) from the receiver in step 420, then the transmitter may transition back to the selection step 410 (S402). Also, in step 420, the transmitter may transition to a selection step 410 when receiving a signal indicating completion of power transmission from the receiver, i.e., a charging completion signal (S403).

Once the ping stage 420 is complete, the transmitter may transition to an identification and configuration step 430 to collect receiver identification and receiver configuration and status information (S404).

In the identifying and configuring step 430, the sender may determine whether the packet is unexpected, whether a desired packet is received during a predefined period of time (time out), a packet transmission error (transmission error) (No power transfer contract), the process can be shifted to the selection step 410 (S405).

Once the identification and configuration for the receiver is complete, the transmitter may transition to power transfer step 440, which transmits the wireless power (S406).

In the power transfer step 440, the transmitter determines whether an unexpected packet is received, a desired packet is received for a predefined period of time (time out), a violation of a predetermined power transmission contract occurs transfer contract violation, and if the charging is completed, the selection step 410 can be performed (S407).

In addition, in the power transfer step 440, if the transmitter needs to reconfigure the power transfer contract according to changes in the transmitter state, etc., it may transition to the identification and configuration step 430 (S408).

The power transmission contract may be set based on the status and characteristic information of the transmitter and the receiver. For example, the transmitter status information may include information on the maximum amount of transmittable power, information on the maximum number of receivable receivers, and the receiver status information may include information on the requested power and the like.

5 is a state transition diagram for explaining a wireless power transmission procedure defined in the PMA standard;

Referring to FIG. 5, power transmission from a transmitter to a receiver according to the PMA standard is largely divided into a standby phase 510, a digital ping phase 520, an identification phase 530, A Power Transfer Phase 540, and an End of Charge Phase 550. FIG.

The waiting step 510 may be a step of performing a receiver identification procedure for power transmission or transitioning to a specific error or a specific event while sensing a power transmission. Here, the specific error and the specific event will become clear through the following description. Also, at a standby step 510, the transmitter may monitor whether an object is present on the Charging Surface. If the transmitter detects that an object has been placed on the charging surface, or if an RXID retry is in progress, the digital switching may proceed to step 520 (S501). Here, RXID is a unique identifier assigned to a PMA compatible receiver. At the standby step 510, the transmitter transmits an analog ping of a very short pulse and, based on the change in current of the transmitting coil, causes the object to move to the active surface of the interface surface-for example, It can be detected whether or not it exists.

The transmitter transited to the digital pinging step 520 sends a digital finger signal to identify whether the sensed object is a PMA compatible receiver. When sufficient power is supplied to the receiver by the digital ping signal transmitted by the transmitter, the receiver can modulate the received digital ping signal according to the PMA communication protocol and transmit a predetermined response signal to the transmitter. Here, the response signal may include a signal strength indicator indicating the strength of the power received at the receiver. At step 520, the transmitter may transition to the identifying step 530 if a valid response signal is received (S502).

If the response signal is not received or it is determined that it is not a PMA compliant receiver, i.e., it is a Foreign Object Detection (FOD), at step 520, the transmitter can transition to the wait step 510 (S503). As an example, a foreign object (FO) may be a metallic object including coins, keys, and the like.

In the identifying step 530, the transmitter may transition to the wait step 510 if the receiver identification procedure fails or the receiver identification procedure must be re-performed and the receiver identification procedure has not been completed for a predefined period of time S504).

If the transmitter succeeds in identifying the receiver, the transmitter may transition from the identifying step 530 to the power transfer step 540 and start charging (S505).

In the power transfer step 540, the transmitter determines if the desired signal is not received within a predetermined time (Time Out), an FO is detected, or if the voltage of the transmit coil exceeds a predefined reference value, (S506).

Also, in the power transmission step 540, if the temperature sensed by the temperature sensor provided inside the transmitter exceeds a predetermined reference value, the transmitter may transition to the completion of charging step 550 (S507).

In the charge completion step 550, if the transmitter is confirmed that the receiver has been removed from the charging surface, the transmitter can transition to the standby state 510 (S509).

If the measured temperature drops below the reference value in the over temperature state, the transmitter may transition from the charging completion step 550 to the digital charging step 520 in step S510.

In the digital ping phase 520 or the power transfer phase 540, the transmitter may transition to the charge completion phase 550 (S508 and S511) when an End Of Charge (EOC) request is received from the receiver.

6 is a block diagram illustrating a structure of a wireless power transmitter according to an embodiment.

6, the wireless power transmitter 600 may include a power conversion unit 610, a power transmission unit 620, a communication unit 630, a control unit 640, and a sensing unit 650 . It should be noted that the configuration of the wireless power transmitter 600 described above is not necessarily an essential configuration, and may be configured to include more or less components.

As shown in FIG. 6, when power is supplied from the power supply unit 660, the power conversion unit 610 may convert the power to a predetermined intensity.

For this, the power conversion unit 610 may include a DC / DC conversion unit 611 and an amplifier 612.

The DC / DC converting unit 611 may convert DC power supplied from the power supply unit 660 into DC power having a specific intensity according to a control signal of the controller 640.

At this time, the sensing unit 650 may measure the voltage / current of the DC-converted power and provide the measured voltage / current to the controller 640. In addition, the sensing unit 650 may measure the internal temperature of the wireless power transmitter 600 and may provide the measurement result to the controller 640 in order to determine whether overheating occurs. For example, the control unit 640 may adaptively cut off the power supply from the power supply unit 650 or block the supply of power to the amplifier 612 based on the voltage / current value measured by the sensing unit 650 . To this end, a power cutoff circuit may be further provided at one side of the power conversion unit 610 to cut off power supplied from the power supply unit 650 or to cut off power supplied to the amplifier 612.

The amplifier 612 can adjust the intensity of the DC / DC-converted power according to the control signal of the controller 640. For example, the control unit 640 may receive the power reception status information and / or the power control signal of the wireless power receiver through the communication unit 630 and may receive the power control information based on the received power reception status information and / So that the amplification factor of the amplifier 612 can be dynamically adjusted. For example, the power reception status information may include, but is not limited to, the intensity information of the rectifier output voltage, the intensity information of the current applied to the reception coil, and the like. The power control signal may include a signal for requesting power increase, a signal for requesting power reduction, and the like.

The power transmitting unit 620 may be configured to include a multiplexer 621 (or a multiplexer), a transmitting coil 622, and the like. In addition, the power transmitting unit 620 may further include a carrier generator (not shown) for generating a specific operating frequency for power transmission.

The carrier generator may generate a specific frequency for converting the output DC power of the amplifier 612 delivered via the multiplexer 621 to AC power having a specific frequency. In the above description, the AC signal generated by the carrier generator is mixed with the output of the multiplexer 621 to generate AC power. However, this is only an example, It should be noted that they may be mixed only or later.

The frequency of the AC power transmitted to each of the transmission coils according to the embodiment may be different from each other, and another embodiment may be implemented by using a predetermined frequency controller having a function of adjusting the LC resonance characteristic for each transmission coil differently It is also possible to set different resonance frequencies for the respective transmission coils.

However, when the resonant frequencies generated in each of the plurality of transmission coils are different, a separate frequency controller for controlling the resonant frequencies is required, which may increase the size of the wireless power transmitter. Accordingly, in one embodiment, The case where power is transmitted using the same resonance frequency will be described with reference to FIGS. 21 to 23. FIG.

6, the power transmission unit 620 includes a multiplexer 621 and a plurality of transmission coils 622 for controlling the output power of the amplifier 612 to be transmitted to the transmission coil, that is, Th to n < th > transmit coils.

The controller 640 according to an embodiment may transmit power by time division multiplexing for each transmission coil when a plurality of wireless power receivers are connected. For example, if the wireless power transmitter 600 has three wireless power receivers-i. E., The first through third wireless power receivers, respectively, identified through three different transmit coils, i. E., First through third transmit coils , The controller 640 controls the multiplexer 621 so that power can be transmitted through a specific transmission coil in a specific time slot. At this time, the amount of power transmitted to the corresponding wireless power receiver can be controlled according to the length of the time slot allocated for each transmission coil, but this is only one embodiment. The power of the amplifier 612 may be controlled to control the transmission power of each wireless power receiver.

The control unit 640 may control the multiplexer 621 so that the detection signals may be sequentially transmitted through the first through n'th transmission coils 622 during the first detection signal transmission procedure. At this time, the control unit 640 can identify the time at which the sensing signal is transmitted using the timer 655. When the sensing signal transmission time arrives, the control unit 640 controls the multiplexer 621 to output a sensing signal It can be controlled to be transmitted. For example, the timer 650 can send a specific event signal to the control unit 640 at predetermined intervals during the ping transmission step. When the event signal is detected, the control unit 640 controls the multiplexer 621 to transmit the corresponding event signal It is possible to control the digital ping to be transmitted through the coil.

In addition, the control unit 640 may transmit a predetermined transmission coil identifier for identifying a signal strength indicator (Signal Strength Indicator) through a transmission coil from the demodulation unit 632 during the first detection signal transmission procedure, Lt; / RTI > received signal strength indicator. In the second sensing signal sending process, the controller 640 controls the multiplexer 621 so that the sensing signal can be transmitted only through the transmitting coil (s) on which the signal strength indicator is received during the first sensing signal sending procedure You may. In another example, when there are a plurality of transmit coils in which the signal strength indicator is received during the first differential sense signal transmission procedure, the control unit 640 transmits the received transmit coil with the signal strength indicator having the largest value as the second differential sense signal In the procedure, the detection signal may be determined as a transmission coil to be transmitted first, and the multiplexer 621 may be controlled according to the determination result.

The modulator 631 may modulate the control signal generated by the controller 640 and transmit the modulated control signal to the multiplexer 621. Here, the modulation scheme for modulating the control signal includes a frequency shift keying (FSK) modulation scheme, a Manchester coding modulation scheme, a phase shift keying (PSK) modulation scheme, a pulse width modulation scheme, A differential bi-phase modulation method, and the like.

The demodulator 632 can demodulate the detected signal and transmit the demodulated signal to the controller 640 when a signal received through the transmission coil is detected. Here, the demodulated signal may include a signal strength indicator, an error correction (EC) indicator for power control during wireless power transmission, an end of charge indicator (EOC), an overvoltage / overcurrent / overheat indicator, But is not limited to, various status information for identifying the status of the wireless power receiver.

Also, the demodulator 632 can identify which of the transmit coils the demodulated signal is received, and provide the control unit 640 with a predetermined transmit coil identifier corresponding to the identified transmit coil.

 In one example, the wireless power transmitter 600 may obtain the signal strength indicator through in-band communication that uses the same frequency used for wireless power transmission to communicate with the wireless power receiver.

In addition, the wireless power transmitter 600 can transmit wireless power using the transmit coil 622, as well as exchange various information with the wireless power receiver via the transmit coil 622. As another example, the wireless power transmitter 600 may further include a separate coil corresponding to each of the transmission coils 622 (i.e., the first to n < th > transmission coils) It should be noted that it may also perform in-band communication with the receiver.

Although the wireless power transmitter 600 and the wireless power receiver perform in-band communication in the description of FIG. 6, this is merely an example, and the frequency band used for the wireless power signal transmission Directional communication through different frequency bands. For example, the near-end bi-directional communication may be any one of low-power Bluetooth communication, RFID communication, UWB communication, and Zigbee communication.

In particular, the wireless power transmitter 600 according to an embodiment of the present invention may adaptively provide a fast charge mode and a general low power charge mode at the request of the wireless power receiver.

The wireless power transmitter 600 can transmit a signal of a predetermined pattern, which is called a first packet for convenience of explanation, when the fast charge mode is supported. The wireless power receiver 600 may identify that the wireless power transmitter 600 being connected is capable of fast charge when the first packet is received.

In particular, the wireless power receiver may send a first response packet to the wireless power transmitter 600 requesting fast charging if fast charging is required.

In particular, the wireless power transmitter 600 may automatically switch to the fast charge mode and initiate fast charge when a predetermined time has elapsed after the first response packet is received.

For example, when the control unit 640 of the wireless power transmitter 600 transits to the power transmission step 440 or 540 of FIGS. 4 through 5, the control unit 640 controls the first packet to be transmitted through the transmission coil 622 However, this is only one example, and another example of the present invention may be the first packet sent out in the identification and configuration step 430 of FIG. 4 or the identifying step 530 of FIG.

It should be noted that another embodiment may transmit encoded information that can identify whether or not fast charge support is available to the digital ping signal transmitted by the wireless power transmitter 600. [

The wireless power receiver may send a predetermined charge mode packet to the wireless power transmitter 600 where the charge mode is set to fast charge if a fast charge is needed at any point in the power transfer phase. Here, the details of the configuration of the charge mode packet will be clarified through the description of FIGS. 7 to 11 to be described later. Of course, the wireless power transmitter 600 and the wireless power receiver can control the internal operation so that power corresponding to the fast charge mode can be sent and received when the charge mode is changed to the fast charge mode. For example, when the charging mode is changed from the normal low-power charging mode to the fast-charging mode, the overvoltage determination criterion, the over temperature criterion, the low-voltage / high- Level (Optimum Voltage Level), power control offset, and the like can be changed and set.

For example, when the charging mode is changed from the normal low-power charging mode to the fast-charging mode, the threshold voltage for determining the overvoltage may be set to be high enough to enable fast charging. As another example, the critical temperature for determining whether overheating occurs may be set high considering the temperature rise due to fast charging. As another example, the power control offset value, which means the minimum level at which the power at the transmitter is controlled, may be set to a larger value than the general low-power charging mode so that it can converge quickly to the desired target power level in the fast-charge mode.

7 is a block diagram illustrating a structure of a wireless power receiver interworking with the wireless power transmitter according to the FIG.

7, the wireless power receiver 700 includes a receiving coil 710, a rectifier 720, a DC / DC converter 730, a load 740, a sensing unit 750, 760, and a main control unit 770. Here, the communication unit 760 may include at least one of a demodulation unit 761 and a modulation unit 762.

Although the wireless power receiver 700 shown in the example of FIG. 7 is shown as being capable of exchanging information with the wireless power transmitter 600 through in-band communication, this is only one embodiment, The communication unit 760 according to the embodiment may provide near-end bi-directional communication through a frequency band different from the frequency band used for the transmission of the wireless power signal.

AC power received through the receiving coil 710 may be transmitted to the rectifying unit 720. [ The rectifier 720 may convert the AC power to DC power and transmit it to the DC / DC converter 730. [ The DC / DC converter 730 may convert the intensity of the rectifier output DC power to a specific intensity required by the load 740 and then forward it to the load 740. The receiving coil 710 may also include a plurality of receiving coils (not shown), i.e., first to n-th receiving coils. The frequency of the AC power transmitted to each of the reception coils (not shown) according to an embodiment may be different from each other, and another embodiment may include a predetermined frequency controller having a function of adjusting LC resonance characteristics for different reception coils The resonance frequencies of the respective receiving coils can be set differently.

The sensing unit 750 may measure the intensity of the DC power output from the rectifier 720 and provide it to the main control unit 770. Also, the sensing unit 750 may measure the intensity of the current applied to the reception coil 710 according to the wireless power reception, and may transmit the measurement result to the main control unit 770. The sensing unit 750 may measure the internal temperature of the wireless power receiver 700 and provide the measured temperature value to the main control unit 770.

For example, the main control unit 770 may compare the measured rectifier output DC power with a predetermined reference value to determine whether an overvoltage is generated. As a result of the determination, if an overvoltage is generated, a predetermined packet indicating that the overvoltage has occurred can be generated and transmitted to the modulating unit 762. Here, the signal modulated by the modulating unit 762 may be transmitted to the wireless power transmitter 600 through the receiving coil 710 or a separate coil (not shown). The main control unit 770 may determine that the detection signal is received when the intensity of the rectifier output DC power is equal to or greater than a predetermined reference value and when the signal strength indicator corresponding to the detection signal is received by the modulation unit 762 To be transmitted to the wireless power transmitter 600 via the wireless network. The demodulation unit 761 demodulates the AC power signal between the reception coil 710 and the rectifier 720 or the DC power signal output from the rectifier 720 to identify whether or not the detection signal is received, (770). At this time, the main control unit 770 may control the signal intensity indicator corresponding to the detection signal to be transmitted through the modulation unit 762. [

8 is a diagram for explaining a packet format according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

Referring to FIG. 8, a packet format 800 used for information exchange between a wireless power transmitter and a wireless power receiver includes a preamble 810 for identifying a synchronization for acquiring a demodulation packet, A header (Header 820) field for identifying a type of a message included in the packet, a message (Message 830) field for transmitting the content of the packet (or payload) And a checksum (840) field for identifying whether an error has occurred or not.

As shown in FIG. 8, the packet receiver may identify the size of the message 830 included in the packet based on the value of the header 820.

In addition, the header 820 may be defined for each step of the wireless power transmission procedure, and some values of the header 820 may be defined at different levels. For example, referring to FIG. 8, it should be noted that the header value corresponding to the end power transfer in the ping phase and the power transmission phase in the power transfer phase may be equal to 0x02.

The message 830 includes data to be transmitted at the transmitter of the packet. For example, the data included in the message 830 field may be, but is not limited to, a report, a request, or a response to the other party.

The packet 700 according to another embodiment may further include at least one of transmitter identification information for identifying a transmitter that transmitted the packet and receiver identification information for identifying a receiver to receive the packet. Here, the transmitter identification information and the receiver identification information may include IP address information, MAC address information, product identification information, and the like. However, the present invention is not limited thereto, and information that can distinguish the receiver and the transmitter on the wireless charging system is sufficient.

The packet 800 according to another embodiment may further include predetermined group identification information for identifying the receiving group when the packet is to be received by a plurality of apparatuses.

FIG. 9 is a diagram for explaining the kinds of packets that the wireless power receiving apparatus according to the electromagnetic induction type wireless power transmission procedure according to one embodiment can transmit in the ping stage.

9, the wireless power receiving apparatus can transmit a signal strength packet or a power transmission stop packet.

Referring to reference numeral 901 in FIG. 9, the message format of the signal strength packet according to an exemplary embodiment may be composed of a signal strength value having a size of 1 byte. The signal strength value may indicate the degree of coupling between the transmitting coil and the receiving coil and may be calculated based on the rectifier output voltage in the digital ping section, the open circuit voltage measured in the output blocking switch, Lt; / RTI > The signal strength value may range from a minimum of 0 to a maximum of 255 and may have a value of 255 if the actual measured value for a particular variable is equal to the maximum value of that variable (Umax).

For example, the signal strength value may be calculated as U / Umax * 256.

Referring to reference numeral 902 in FIG. 9, the message format of the power transmission stop packet according to an exemplary embodiment may be configured as an end power transfer code having a size of 1 byte.

The reasons why the wireless power receiving apparatus requests the wireless power transmitter to stop the power transmission include charging completion, internal fault, overtemperature, overvoltage, overcurrent, battery But is not limited to, Battery Failure, Reconfigure, and No Response. It should be noted that the power transmission interruption code may be further defined in response to each new power transmission interruption reason.

Charging complete can be used to indicate that the charging of the receiver battery is complete. Internal errors can be used when a software or logical error in the internal operation of the receiver is detected.

Overheating / overvoltage / overcurrent can be used when the measured temperature / voltage / current value at the receiver exceeds the defined threshold for each.

Battery damage can be used if it is determined that there is a problem with the receiver battery.

Reconfiguration can be used when renegotiation is required for power transmission conditions. No response can be used if the transmitter's response to the control error packet - meaning increasing or decreasing the strength of the power - is judged to be unhealthy.

10 is a diagram for explaining a message format of an identification packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

10, the message format of the identification packet includes a Version Information field, a Manufacturer Information field, an Extension Indicator field, and a Basic Device Identification Information field Lt; / RTI >

In the version information field, revision version information of a standard applied to the wireless power receiving apparatus can be recorded.

In the manufacturer information field, a predetermined identification code for identifying the manufacturer of the wireless power receiving apparatus may be recorded.

The extension indicator field may be an indicator for identifying whether an extended identification packet including the extended device identification information exists. For example, if the value of the extension indicator is 0, it means that there is no extension identification packet, and if the extension indicator value is 1, it means that the extension identification packet exists after the identification packet.

Referring to reference numerals 1001 to 1002, if the extension indicator value is 0, the device identifier for the corresponding wireless power receiver may be a combination of manufacturer information and basic device identification information. On the other hand, if the extension indicator value is 1, the device identifier for the wireless power receiver may be a combination of manufacturer information, basic device identification information, and extended device identification information.

11 is a diagram for explaining a message format of a configuration packet and a power control hold packet according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

11, the message format of the configuration packet may have a length of 5 bytes, and may include a power class field, a maximum power field, a power control field, A count field, a window size field, a window offset field, and the like.

The power rating field may record the power rating assigned to the wireless power receiver.

The maximum power field may record the intensity value of the maximum power that can be provided at the rectifier output of the wireless power receiver.

For example, in the case where the power level is a and the maximum power is b, the maximum power amount Pmax desired to be provided at the rectifier output of the wireless power receiving apparatus can be calculated as (b / 2) * 10 ^a .

The power control field can be used to indicate which algorithm should be used to control the power in the wireless power transmitter. For example, if the power control field value is 0, it implies applying the power control algorithm defined in the standard, and if the power control field value is 1, it means that the power control is performed according to the algorithm defined by the manufacturer.

The count field may be used to record the number of option configuration packets that the wireless power receiving device will send in the identification and configuration phase.

The window size field may be used to record the window size for calculating the average received power. As an example, the window size may be a positive integer value that is greater than zero and has a unit of 4 ms.

In the window offset field, information for identifying the time from the end of the average reception power calculation window to the transmission start point of the next received power packet may be recorded. In one example, the window offset may be a positive integer value greater than zero and in units of 4 ms.

Referring to reference numeral 1102, the message format of the power control hold packet may be configured to include a power control hold time (T_delay). A plurality of power control hold packets may be transmitted during the identification and configuration phase. For example, up to seven power control pending packets may be transmitted. The power control hold time (T_delay) may have a value between a predefined power control hold minimum time (T_min: 5 ms) and a power control hold maximum time (T_max: 205 ms). The wireless power transmission apparatus can perform power control using the power control retention time of the power control retention packet last received in the identification and configuration step. Also, the wireless power transmission apparatus can use the T_min value as the T_delay value when the power control hold packet is not received in the identification and configuration step.

The power control retention time may refer to the time that the wireless power transmission apparatus should wait without performing the power control before performing the actual power control after receiving the latest control error packet.

FIG. 12 is a diagram for explaining a type of a packet that can be transmitted in a power transmission step and a message format thereof by a wireless power receiving apparatus according to an electromagnetic induction wireless power transmission procedure according to an embodiment.

12, a packet that can be transmitted by the wireless power receiving apparatus in the power transmission step includes a control error packet, an end power transfer packet, a received power packet, A packet (Charge Status Packet), a packet defined by a manufacturer, and the like.

Reference numeral 1201 denotes a message format of a control error packet composed of a 1-byte control error value. Here, the control error value may be an integer value ranging from -128 to +127. If the control error value is negative, the transmission power of the radio power transmission apparatus decreases, and if it is positive, the transmission power of the radio power transmission apparatus can be increased.

Reference numeral 1202 denotes a message format of an End Power Transfer Packet consisting of a 1-byte End Power Transfer Code.

Reference numeral 1203 denotes a received power packet of a received power packet including a 1-byte received power value. Here, the received power value may correspond to the average rectifier received power value calculated during a predetermined period. The actual received power amount (P _received ) can be calculated based on the maximum power and the power class included in the configuration packet 1001. As an example, the actual amount of power received can be calculated by (received power value / 128) * (maximum power / 2) * (10 ^{power rating} ).

Reference numeral 1204 denotes a message format of a Charge Status Packet consisting of a 1-byte Charge Status Value. The charge state value may indicate the battery charge amount of the wireless power receiving device. For example, the charge state value 0 means a completely discharged state, the charge state value 50 may mean a 50% charge state, and the charge state value 100 may mean a full charge state. If the wireless power receiving device does not include a rechargeable battery or can not provide charge state information, the charge state value may be set to OxFF.

13 is a diagram for explaining three drive circuits including a full-bridge inverter in a wireless power transmitter including a plurality of coils according to an embodiment.

13, when three coils included in a wireless power transmitter have different inductances, three drive circuits 1310 connected to respective coils and three capacitors including a capacitor for generating the same resonance frequency An LC resonance circuit 1320 is required.

Although the wireless power transmitter includes a plurality of coils, the resonant frequency that the wireless power transmitter generates to perform the power transmission should not depend on each of the transmit coils, and must conform to the standard resonant frequency supported by the wireless power transmitter.

The resonance frequency generated in the LC resonance circuit 1320 may vary depending on the inductance of the coil and the capacitance of the capacitor.

For example, the resonant frequency (fr) may be 100 KHz, and when the capacitance of the capacitor connected to the coil to generate the resonance frequency is 200 nF, if only one capacitor is used, all three coils are 12.5 uH. When the inductances of the three coils are different from each other, three capacitors having different capacitances corresponding to each other are required in order to generate a resonance frequency of 100 kHz. In addition, three drive circuits 1310 including an inverter for applying an AC voltage in each of the LC resonance circuits 1320 are also required.

14 is a diagram illustrating a wireless power transmitter including a plurality of coils and one drive circuit according to an embodiment.

14, if the inductances of the three coils of the wireless power transmitter are the same, the wireless power transmitter may include only one drive circuit 1410, and may include one drive circuit 1410 and three coils, And the switch 1430 to connect the coil of the wireless power transmitter having the highest power transmission efficiency.

Compared with FIG. 13, the wireless power transmitter can reduce the area occupied by the components by using only one drive circuit 1410, thereby making it possible to miniaturize the wireless power transmitter itself and reduce the cost of raw materials required for manufacturing .

In one embodiment, the wireless power transmitter may use the signal strength indicator in the ping phase to calculate the power transfer efficiency between the three coils of the wireless power transmitter and the coils of the wireless power receiver.

Alternatively, the wireless power transmitter may calculate the coupling coefficient between the transmitting and receiving coils to select a coil of the wireless power transmitter having a high coupling coefficient.

Alternatively, the wireless power transmitter may calculate a Q factor to control the switch 2730 to identify the coil of the high power wireless power transmitter and connect it to the drive circuit 2710.

15 is a diagram for explaining a drive circuit including a full-bridge inverter according to an embodiment.

Referring to FIG. 15, a power transmitter included in a wireless power transmitter can generate a specific operating frequency for power transmission. The power transfer section may include an inverter 1510, an input power supply 1520 and an LC resonant circuit 1530.

The inverter 1510 can convert the voltage signal from the input power source and transmit it to the LC resonance circuit 2830. [ In one embodiment, the inverter 1510 may be a full-bridge inverter or a half-bridge inverter.

The power transfer section can use a full bridge inverter for higher output than the output by the half bridge inverter. The full bridge inverter can be applied to the LC resonance circuit 1280 by outputting a voltage two times higher than that of the half bridge inverter by using four switches in the form of adding two switches to the half bridge inverter.

16 is a diagram for explaining a plurality of switches for connecting any one of a plurality of coils of a wireless power transmitter with a drive circuit according to an embodiment.

16, the power transmission unit includes a drive circuit 1610 for converting an input voltage, a switch 1620 for connecting the drive circuit 1610 and the LC resonance circuit, a plurality of transmission coils 1630, a plurality of wireless power transmitters 1630, One capacitor 1640 connected in series with the coil of the switch 1620, and a controller 1650 for controlling the opening and closing of the switch 1620.

The control unit 1650 identifies the coils of the wireless power receiver among the plurality of coils 1630 of the wireless power transmitter and the coils of the wireless power transmitter with the highest power transmission efficiency and outputs the coils of the identified wireless power transmitter to the drive circuit 1610. [ Lt; RTI ID = 0.0 > switch < / RTI >

17 is a block diagram for explaining a wireless charging system according to another embodiment.

Referring to FIG. 17, the wireless charging system includes a wireless power transmitter 40 for transmitting power wirelessly, a wireless power repeater 70 for relaying the transmitted power, a wireless power receiver 70 for receiving the transmitted power or the relayed power A power receiver 50 and an electronic device 60 that receives the received power. For example, the wireless power transmitter 40 receives power from an externally connected AC power source, and transmits the transmitted power coupled to the transmission coil to the wireless power repeater 70. The wireless power repeater 70 may transmit the power received from the wireless power transmitter 40 to the wireless power receiver 50. [ That is, the wireless power repeater 70 may serve as a relay for receiving power from the wireless power transmitter 40 and for transmitting power to the wireless power receiver 50. [

18 is a circuit diagram for explaining a wireless power repeater including a relay coil according to yet another embodiment.

Referring to FIG. 18, the wireless power repeater 70 may include an LC resonant circuit 1710. The LC resonance circuit 1710 can generate radio power having the same resonance frequency as the resonance frequency of the radio power output from the radio power transmitter 40. [ The LC resonance circuit 1710 may include a relay coil and a capacitor.

The wireless power repeater 70 may include a switch portion 1720. The switch unit 1720 may drive or stop the wireless power relay of the wireless power repeater 70. [

The wireless power repeater 70 may include a controller 1730. The control unit 1730 controls the switch unit 1720 to drive the wireless power relay of the wireless power repeater 70 or to determine whether to stop the wireless power relay.

19 is a side view of a wireless power repeater in accordance with one embodiment.

Referring to FIG. 19, the wireless power repeater 1800 may have a housing in the form of a screw bolt. The housing may be made of a metal material or a non-metallic material. For example, the non-metallic material may include a material such as polycarbonate (PC), polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), or the like. Further, the housing may include a shielding material in part or in whole.

In addition, the housing of the wireless power repeater 1800 may include a head 1810. The head 1810 may be used to install the wireless power repeater 1800. In addition, the head 1810 can be arranged with a wireless power receiver because the relayed wireless power is concentrated. For example, a wireless power receiver may be placed on the head 1810. Also, a wireless power receiver may be fixed to the head 1810, such as by being engaged or jammed. The head 1810 may include a groove 1811. The groove 1811 may be used to install the wireless power repeater 1800. For example, a wireless power repeater 1800 including a screw bolt-shaped housing by applying a rotational force to the head portion 1810 after binding to the groove 1811 using an external tool such as a screwdriver is mounted on a wall, a table, a chair It can be fixed to the installation place.

In addition, the housing of the wireless power repeater 1800 may include a body 1820. The body 1820 may include a post 1821 and a thread 1822. The post 1821 can protect the configuration of a circuit or the like for relaying the wireless power that is disposed inside the wireless power repeater 1800. The post 1821 can also transmit the rotational force applied to the head 1810 to the thread 1822 when the wireless power repeater 1800 is fixed to the installation site. The columnar portion 1821 may be a cylindrical shape, a triangular column, a square column, a pentagonal column, a hexagonal column, or the like, but is not limited thereto. The threads 1822 can be directly coupled to the location where the wireless power repeater 1800 is secured in place. The threaded portion 1822 may be shaped to protrude from the column portion 1821. The body portion 1820 includes a first region a1 in which the column portion 1821 and the thread 1822 are disposed and a second region a2 in which only the column portion 1821 is not disposed, can do. The first area a1 of the trunk portion 1820 is a portion coupled with the place where the wireless power repeater 1800 is fixed to the installation place by the thread 1822 described above. A second region a2 of the trunk portion 1820 may be coupled to a wireless power receiver. For example, a wireless power receiver may be deployed to receive wireless power intensively in such a manner that it is caught in a second region a2 of the body portion 1820 using a hook or hole shaped catch of the wireless power receiver have. In addition, the body portion 1820 may have the second region a2 removed as necessary, and only the first region a1 may exist.

Therefore, the present invention can be installed in a place where a wireless power repeater is installed without limitation. In addition, the present invention is simple to install a wireless power repeater. In addition, the present invention allows a wireless recharging receiver to receive power from any location by means of a wireless power repeater. In addition, the present invention can increase the charging efficiency of the wireless charging receiver by the wireless power repeater.

20 is a top view of a wireless power repeater in accordance with one embodiment.

Referring to FIG. 20, there is shown a top view of a housing of a wireless power repeater 1800 of one embodiment according to FIG.

The groove 1811 disposed in the head portion 1810 of the wireless power repeater 1800 is provided with an external tool such as a screwdriver to be used to install the wireless power repeater 1800 to apply a rotational force to the head portion 1810 Or the like. For example, as shown in FIG. 20A, the groove 1811a may have a straight shape. 20 (b), the groove 1811b may have a cross shape.

21 is a cross-sectional view of a wireless power repeater in accordance with one embodiment.

21, a description will be given of a configuration for relaying power disposed in the first area a1 or the second area a2 of the columnar section 1821 in the wireless power repeater 1800 according to the embodiment shown in Fig. Fig.

The wireless power repeater 1800 may include a relay coil 1830. The relay coil 1830 may be disposed inside the housing of the wireless power repeater 1800. The relay coil 1830 can deliver the power generated in the inductive or resonant manner at the transmit coil of the wireless power transmitter to the receive coil of the wireless power receiver. The relay coil 1830 may be wound around the shield 1840. More specifically, the relay coil 1830 may be stacked while being disposed around the shielding member 1840. For example, the relay coil 1830 may be arranged in the form of a solenoid.

In addition, the wireless power repeater 1800 may include a shield 1840. The shield 1840 may be disposed inside the housing of the wireless power repeater 1800. The shielding member 1840 may guide the power generated by the relay coil 1830 to the head 1810. The shielding member 1840 may be a cylindrical shape, a triangular prism, a square prism, a pentagonal prism, a hexagonal prism, or the like, but is not limited thereto.

In addition, the wireless power repeater 1800 may include a capacitor 1850. Capacitor 1850 may be disposed within the housing of wireless power repeater 1800. More specifically, the capacitor 1850 may be disposed on the side surface, the bottom surface, or the top surface of the shielding member 1840. For example, as shown in FIG. 21, the capacitor 1850 may be disposed on the side surface of the shielding member 1840 and inside the relay coil 1830.

When the wireless power repeater 1800 receives and transmits power by the resonance method, the resonance frequency can be determined by the inductance value of the relay coil 1830 and the capacitance value of the capacitor 1850.

22 is a cross-sectional view of a wireless power repeater according to another embodiment.

Referring to FIG. 22, a wireless power repeater according to another embodiment has the same configuration as that of the wireless power repeater 1800 according to another embodiment shown in FIG. 21 except for the following description.

The wireless power repeater may include a relay coil 1930. The relay coil 1930 may be disposed inside the housing of the wireless power repeater. The relay coil 1930 can transmit power generated in the transmitting coil to the receiving coil of the wireless power receiver in a wireless power transmitter. The relay coil 1930 may also be arranged corresponding to the thread 1922. [ More specifically, the relay coil 1930 can be disposed inside the threaded portion 1922 that extends from the column portion 1921 and protrudes around the shielding member 1940 around the shielding member 1940.

In addition, the wireless power repeater may include a shield 1940. The shielding member 1940 may be disposed inside the housing of the wireless power repeater. The shielding member 1940 may guide the power generated by the relay coil 1930 to the head portion 1910. The shielding member 1940 may be a cylindrical shape, a triangular prism, a square prism, a prismatic prism, a hexagonal prism, or the like, but is not limited thereto.

In addition, the wireless power repeater may include a capacitor 1950. Capacitor 1950 may be disposed within the housing of the wireless power repeater. More specifically, the capacitor 1950 may be disposed on the side surface, the bottom surface, or the top surface of the shielding member 1940. For example, as shown in FIG. 22, the capacitor 1950 may be disposed at the top of the shielding member 1940.

When the wireless power repeater receives and transmits power by the resonance method, the resonance frequency can be determined by the inductance value of the relay coil 1930 and the capacitance value of the capacitor 1950.

23 is a cross-sectional view of a wireless power repeater according to yet another embodiment.

Referring to FIG. 23, a wireless power repeater according to another embodiment has the same configuration as the wireless power repeater 1800 according to the embodiment of FIG. 21 except for the following description.

The wireless power repeater may include a relay coil 2030. The relay coil 2030 may be disposed outside the housing of the wireless power repeater. The relay coil 2030 can transmit the power generated in the transmitting coil to the receiving coil of the wireless power receiver in a wireless power transmitter in a floating or resonant manner. The relay coil 2030 may also be disposed corresponding to the thread 2022 and the threaded bone 2023 disposed in the adjacent thread 2022. More specifically, the relay coil 2030 can be disposed in the threaded hole 2023 while surrounding the columnar portion 2021 with the shielding member 2040 as an axis. Further, the relay coil 2030 can be wrapped around the threaded boss 2023 more than once. For example, as shown in Fig. 23, the relay coil 2030 is wrapped around the threaded boss 2023 twice.

In addition, the wireless power repeater may include a shield 2040. The shielding member 2040 may be disposed inside the housing of the wireless power repeater. The shielding member 2040 can guide the power generated by the relay coil 2030 to the head 2010. The shielding member 2040 may be a cylindrical shape, a triangular prism, a square prism, a prismatic prism, a hexagonal prism, or the like, but is not limited thereto.

In addition, the wireless power repeater may include a capacitor 2050. Capacitor 2050 may be disposed within the housing of the wireless power repeater. More specifically, the capacitor 2050 may be disposed on the side surface, the bottom surface, or the top surface of the shielding member 2040. For example, the capacitor 2050 may be disposed at the top of the shield 2040, as shown in FIG.

When the wireless power repeater receives and transmits power by the resonance method, the resonance frequency can be determined by the inductance value of the relay coil 1930 and the capacitance value of the capacitor 2050.

24 is a diagram for explaining a state in which a wireless power repeater according to an embodiment is installed.

Referring to FIG. 24, the wireless power repeater 2100 according to FIG. 19 and FIG. 21 is installed in the installation place 2200. The wireless power repeater 2100 can be installed by fixing the trunk portion 2020 of the housing to an installation site (e.g., a wall, a floor, a ceiling, a table, a chair, etc.). In particular, the threads 2022 of the housing can be fixed in combination with the installation site.

25 is a view for explaining a state in which a wireless power repeater according to another embodiment is installed.

Referring to FIG. 25, a wireless power repeater 2300 according to yet another embodiment may further include an installation member 2400 in a wireless power repeater 1800 in one embodiment according to FIG. The mounting member 2400 may engage with the housing of the wireless power repeater 2300. The mounting member 2400 may be fixed to the installation site 2500 to facilitate fixing for installation of the housing of the wireless power repeater 2300. The mounting member 2400 may include a frame 2410 including side walls and a bottom surface, and a second thread 2420 extending from the frame. The second threaded portion 2420 may be disposed corresponding to the first threaded portion 2322 of the housing. For example, the mounting member 2400 may be an anchor. Therefore, the installation member 2400 can facilitate installation, replacement, removal, and the like of the wireless power repeater 2300.

26 is a side view of a wireless power repeater in accordance with another embodiment.

Referring to FIG. 26, the wireless power repeater 2400 according to another embodiment may further include a third area a5 in the housing as compared with the wireless power repeater 1800 according to FIG.

More specifically, the housing of the wireless power repeater 2400 may include a trunk portion 2420. The soma portion 2420 may include a pillar portion 2421, a screw thread 2422, or a point portion 2423. [ The post 2421 can protect the configuration of a circuit or the like for relaying the wireless power that is disposed inside the wireless power repeater 2400. The post 2421 can transmit the rotational force applied to the head 2410 to the thread 2422 and the point 2423 when the wireless power repeater 2400 is fixed to the installation site. The columnar section 2421 may be a cylindrical shape, a triangular column, a square column, a pentagonal column, a hexagonal column, or the like, but is not limited thereto. The threads 2422 can be directly coupled with the fixture when securing the wireless power repeater 2400 to the installation site. The threaded portion 2422 may extend from the column portion 2421 and protrude therefrom. The body portion 2420 includes a first region a3 in which the column portion 2421 and the screw thread 2422 are disposed and a second region a4 in which only the column portion 2421 is not disposed, And a third region a5 in which a portion 2421, a screw thread 2422, and a point portion 2423 are disposed. The first region a3 of the trunk portion 2420 is a portion coupled with a place where the wireless power repeater 2400 is fixed to the installation site by the thread 2422 described above. A second region a4 of the trunk portion 2420 may be coupled to a wireless power receiver. For example, a wireless power receiver may be deployed to receive wireless power intensively in such a manner that it engages in a second region a4 of the body portion 2420 using a hook or hole shaped catch of the wireless power receiver have. The third region a5 of the trunk portion 2420 may be a shape in which the pillar portion 2421 is narrowed to the point portion 2423 in the first region a3. The third area a5 allows the installation site to be easily penetrated when the wireless power repeater 2400 is installed. For example, when the installation member 2420 is not disposed in the installation place 2500 in FIG. 25, it can be installed using the wireless power repeater 2400 according to FIG. In addition, the body portion 2420 may have the second region a4 removed as necessary, and only the first region a1 and the third region a5 may exist.

27 is a side view of a power transmission portion of a wireless power transmitter in accordance with an embodiment.

27, in the wireless power transmitter, the housing of the power transmission unit 2500 may be in the form of a screw bolt. The housing may be made of a metal material or a non-metallic material. For example, the non-metallic material may include a material such as polycarbonate (PC), polytetrafluoroethylene (PTFE), polyvinyl chloride (PVC), or the like. Further, the housing may include a shielding material in part or in whole.

In addition, the housing 2500 of the wireless power transmitter may include a head 2510. Head portion 2510 may be used to provide a wireless power transmitter, particularly power transmission portion 2500. [ In addition, the head portion 2510 can be arranged with a wireless power receiver because the transmitted wireless power is concentrated. For example, a wireless power receiver may be placed on head 2510. Also, the wireless power receiver may be fixed to the head 2510, such as by being engaged or jammed. The head portion 2510 may include a groove 2511. The groove 2511 may be used to install a wireless power transmitter, particularly a power transmission unit 2500. For example, a wireless power transmitter including a housing having a screw-bolt shape by applying a rotational force to the head portion 2510 after binding to the groove 2511 using an external tool such as a screw driver, for example, a power transmitting portion 2500, Can be fixed to the installation place of a wall, a table, a chair, and the like.

In addition, the housing of the wireless power repeater power transmission unit 2500 may include a body portion 2520. The body portion 2520 may include a column portion 2521 and a thread 2522. The column portion 2521 can protect the configuration of a circuit or the like for transmitting wireless power disposed inside the power transmission portion 2500 of the wireless power transmitter. The column 2521 may transmit the rotational force applied to the head 2510 to the thread 2522 when the wireless power transmitter, particularly the power transmission unit 2500, is fixed to the installation site. The column 2521 may be a cylindrical shape, a triangular column, a square column, a pentagonal column, a hexagonal column, or the like, but is not limited thereto. The thread 2522 can be directly coupled to the fixed location when securing the wireless power transmitter, particularly the power transfer section 2500, to the installation site. The thread 2522 may extend from the column 2521 and protrude. The body portion 2520 includes a first region b1 in which the column portion 2521 and the thread 2522 are disposed and a second region b2 in which only the column portion 2521 is not disposed, can do. The first region b1 of the body portion 2520 is a portion that is coupled with a place where the wireless power transmitter, particularly the power transmission portion 2500, is fixed to the installation place by the thread 2522 described above. The second region b2 of the body portion 2520 may be coupled to a wireless power receiver. For example, a wireless power receiver may be deployed to receive wireless power intensively in such a way that it is caught in a second region b2 of the body portion 2520 using a hook or hole shaped catch of the wireless power receiver have. In addition, the body portion 2520 may have the second region b2 removed as necessary and only the first region b1 may exist. In addition, the power transmitter 2500 of the wireless power transmitter may include a first input power supply gate 2530. The first input power supply gate 2530 may be a terminal capable of providing input power to the drive circuit within the power transfer section 2500. For example, the first input power source gate 2530 may be disposed at the lower end of the body portion 2520.

Therefore, the present invention can be installed in a place where a wireless power transmitter is installed without limitation. Further, the present invention is simple to install a wireless power transmitter. In addition, the present invention allows a wireless recharging receiver to receive power at any location by a wireless power transmitter. In addition, the present invention can increase the charging efficiency of the wireless charging receiver by the wireless power transmitter.

28 is a cross-sectional view of a power transmission portion of a wireless power transmitter in accordance with one embodiment.

Referring to FIG. 28, in the power transmission unit 2500 of the wireless power transmitter according to the embodiment shown in FIG. 27, the wireless power disposed in the first area b1 or the second area b2 of the column 2521 And Fig.

The power transmitter 2500 of the wireless power transmitter may include a transmit coil 2540. The transmit coil 2540 may be disposed within the housing of the power transmission portion 2500 of the wireless power transmitter. The transmit coil 2540 may transmit power generated in an inductive or resonant manner to the receive coil of the wireless power receiver. The transmission coil 2540 may be disposed in a stacked manner while covering the shielding member 2550 with the shielding member 2550 as an axis. For example, the transmitting coil 2540 may be arranged in a solenoidal form.

In addition, the power transmission unit 2500 of the wireless power transmitter may include a shielding material 2550. The shielding member 2550 may be disposed inside the housing of the electric power transmission unit 2500. The shielding member 2550 may guide the power generated in the transmission coil 2540 to the head portion 2510. The shielding member 2550 may be a cylindrical shape, a triangular prism, a square prism, a pentagonal prism, a hexagonal prism, or the like, but is not limited thereto.

In addition, the power transmission unit 2500 of the wireless power transmitter may include a driver circuit 2560. The driver circuit 2560 can provide the power input to the transmission coil 2540 from the first input power supply gate 2530.

29 is a cross-sectional view of a power transmission portion of a wireless power transmitter according to another embodiment.

29, the power transmission unit of the wireless power transmitter according to another embodiment is the same in configuration as the power transmission unit 2500 of the wireless power transmitter according to the embodiment of FIG. 28 except for the following description .

The power transmitter 2600 of the wireless power transmitter may include a transmit coil 2640. The transmitting coil 2640 may be disposed inside the housing of the power transmitting portion 2600. [ The transmit coil 2640 may transmit power generated in an inductive or resonant manner to a receive coil of the wireless power receiver. The transmission coil 2640 may also be disposed corresponding to the thread 2622. [ More specifically, the transmission coil 2650 can be disposed inside the thread 2622 that extends from the pole portion 2621 and protrudes around the shield 2650 around the shield 2650.

In addition, the power transmission portion 2600 of the wireless power transmitter may include a shielding material 2650. The shielding member 2650 may be disposed inside the housing of the electric power transmitting portion 2600. The shielding member 2650 can guide the power generated in the transmission coil 2640 to the head. The shielding material 2650 may be a cylindrical shape, a triangular prism, a square prism, a pentagonal prism, a hexagonal prism, or the like, but is not limited thereto.

In addition, the power transmitter 2600 of the wireless power transmitter may include a driver circuit 2660. [ The driver circuit 2660 may provide the input power to the transmit coil 2640 at the first input power supply gate 2630.

30 is a cross-sectional view of a power transmission portion of a wireless power transmitter according to yet another embodiment.

Referring to FIG. 30, the power transmission unit of the wireless power transmitter according to another embodiment has the same configuration as the power transmission unit 2500 of the wireless power transmitter according to the embodiment of FIG. 28 except for the following description Do.

The power transmitter 2700 of the wireless power transmitter may include a transmit coil 2740. The transmitting coil 2740 may be disposed outside the housing of the power transmitting portion 2700. The transmit coil 3740 may transmit power generated in an inductive or resonant manner to the receive coil of the wireless power receiver. The transmission coil 2740 may also be disposed corresponding to the thread 2722 and the thread 2723 disposed in the adjacent thread 2722. [ More specifically, the transmission coil 2740 can be disposed on the threaded frame 2723 while surrounding the columnar portion 2721 with the shielding material 2750 as an axis. Further, the transmission coil 2740 may be wrapped around the threaded boss 2723 more than once. For example, as shown in FIG. 30, the transmission coil 2740 is wrapped around the thread 2723 twice.

In addition, the power transmission portion 2700 of the wireless power transmitter may include a shield 2750. The shielding material 2750 may be disposed inside the housing of the power transmitting portion 2700. The shielding member 2750 can guide the power generated in the transmission coil 2740 to the head. The shielding member 2750 may be a cylindrical shape, a triangular prism, a square prism, a pentagonal prism, a hexagonal prism, or the like, but is not limited thereto.

In addition, the power transmitter 2700 of the wireless power transmitter may include a driver circuit 2760. The driver circuit 2760 may provide the power input to the first input power supply gate 2730 to the transmit coil 2740.

31 is a view for explaining a state in which a wireless power transmitter according to an embodiment is installed.

Referring to FIG. 31, a wireless power transmitter according to an embodiment may further include an installation member 2900 in a power transmission unit 2800 of a wireless power transmitter of an embodiment according to FIG. The mounting member 2900 may engage with the housing of the power transmission unit 2800. The mounting member 2900 can be fixed to the installation site 3000 to facilitate fixing for installation of the housing of the power transmission unit 2800 of the wireless power transmitter. The mounting member 2900 may include a frame 2910 including side walls and a bottom surface, and a second thread 2920 extending from the frame. The second threads 2920 may be disposed corresponding to the first threads 2822 of the housing. For example, the mounting member 2900 may be an anchor. Therefore, the installation member 2900 can facilitate installation, replacement, removal, and the like of the power transmission unit 2800 of the wireless power transmitter.

In addition, the mounting member 2900 may include a second input power supply gate 2930. The second input power supply gate 2930 may be a terminal capable of contacting or coupling with the first input power supply gate 2830 of the power transfer section 2800. The second input power supply gate 2930 may be disposed above the bottom surface of the frame 2910.

The mounting member 2900 may include a circuit portion 2940 capable of accommodating a power conversion portion, a control portion, and the like which are other circuit structures other than the driver circuit. The circuit portion 2940 may provide power to the power transfer portion 2800. The circuit portion 2940 may be disposed below the bottom surface of the frame 2910. In addition, the circuit unit 2940 may be connected to an electric wire (not shown) so that external power may be supplied.

The method according to the above-described embodiments may be implemented as a program to be executed by a computer and stored in a computer-readable recording medium. Examples of the computer-readable recording medium include a ROM, a RAM, a CD- , A floppy disk, an optical data storage device, and the like, and may also be implemented in the form of a carrier wave (for example, transmission over the Internet).

The computer readable recording medium may be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner. And, functional program, code, and code segments for implementing the above-described method can be easily inferred by programmers in the technical field to which the embodiment belongs.

It will be apparent to those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

Accordingly, the above description should not be construed in a limiting sense in all respects and should be considered illustrative. The scope of the present invention should be determined by rational interpretation of the appended claims, and all changes within the scope of equivalents of the present invention are included in the scope of the present invention.

Claims (20)

A screw-bolt-shaped housing;
A shielding member disposed inside the housing;
A relay coil wound around the shield member; And
And a capacitor disposed in the shielding material. The method according to claim 1,
The housing further includes a head portion and a body portion,
Wherein the body includes a post and a thread extending from the post. 3. The method of claim 2,
Wherein the body is divided into a first region in which threads are disposed and a second region in which no threads are disposed. 3. The method of claim 2,
The head including a groove. The method according to claim 1,
Wherein the relay coil is disposed inside the housing and is laminated while surrounding the shielding material. The method according to claim 1,
Wherein the relay coil is disposed within the housing and disposed in a solenoidal fashion. 3. The method of claim 2,
Wherein the relay coil is disposed within the thread. 3. The method of claim 2,
Wherein the body further comprises a threaded bone between the threads,
Wherein the relay coil is disposed on the outside of the housing and surrounds the body and is disposed in the threaded hole. 3. The method of claim 2,
Further comprising an attachment member for engaging with the housing,
Wherein the mounting member includes a frame having a side wall and a bottom surface disposed thereon, and a second thread protruding from the frame. 3. The method of claim 2,
Wherein the body further comprises a point portion,
Wherein the body includes a first region in which threads are disposed and a second region in which the pillar is narrowed while extending from the first region to the point portion. A power transmission unit including a housing in the form of a screw bolt, a shield member disposed inside the housing, a transmission coil wound around the shield member, and a drive circuit; And
And a circuitry for providing power to the power transfer section. 12. The method of claim 11,
The housing further includes a head portion and a body portion,
Wherein the body includes a post and a thread extending from the post. 13. The method of claim 12,
Wherein the body is divided into a first region in which threads are disposed and a second region in which no threads are disposed. 13. The method of claim 12,
The head including a groove. 12. The method of claim 11,
Wherein the transmitting coil is disposed inside the housing and is laminated while enclosing the shielding material. 12. The method of claim 11,
Wherein the transmit coil is disposed within the housing and disposed in a solenoidal fashion. 13. The method of claim 12,
Wherein the transmitting coil is disposed within the thread. 13. The method of claim 12,
Wherein the body further comprises a threaded bone between the threads,
Wherein the transmitting coil is disposed outside the housing and surrounding the body and disposed in the threaded bone. 13. The method of claim 12,
Further comprising an attachment member for engaging with the housing,
Wherein the mounting member includes a frame having a side wall and a bottom surface disposed thereon, and a second thread protruding from the frame. 20. The method of claim 19,
The housing further includes a first input power gate electrically connected to the driver circuit and disposed at a lower end of the body portion,
And the mounting member includes a second input power gate disposed at the top of the bottom surface and providing power to the first input power gate provided by the circuitry.

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