KR20170068167A - Apparatus For Forming Transmitting Coil of Wireless Power Transmitter, Transmitting Coil Module, And Method of Manufacturing The Same - Google Patents

Abstract

The present invention relates to a wireless power transmission technology, and an apparatus for forming a transmission coil of a wireless power transmitter according to an embodiment of the present invention includes a transmission coil insertion unit for receiving a transmission coil for transmission of radio power inserted through a transmission coil insertion unit, part; And a transmission coil guide for physically separating adjacent ones of the transmission coils.

Description

[0001] The present invention relates to a transmission coil forming apparatus, a transmission coil module, and a method of manufacturing the transmission coil of a wireless power transmitter,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless power transmission technique, and more particularly, to a transmission coil forming apparatus, a transmission coil module, and a manufacturing method thereof for a wireless power transmitter.

Recently, as the information and communication technology rapidly develops, a ubiquitous society based on information and communication technology is being made.

In order for information communication devices to be connected anytime and anywhere, sensors equipped with a computer chip having a communication function must be installed in all facilities of the society. Therefore, power supply problems of these devices and sensors are becoming a new challenge. In addition, mobile devices such as Bluetooth handsets and iPods, as well as mobile phones, have been rapidly increasing in number, and charging the battery has required users time and effort. As a way to solve this problem, wireless power transmission technology has recently attracted attention.

The wireless power transmission technology (wireless power transmission or wireless energy transfer) is a technology to transmit electric energy from the transmitter to the receiver wirelessly using the induction principle of the magnetic field. In the 1800s, electric motor or transformer Thereafter, a method of transmitting electric energy by radiating an electromagnetic wave such as a radio wave or a laser was tried. Our electric toothbrushes and some wireless shavers are actually charged with electromagnetic induction.

Up to the present, energy transmission using radio may be roughly classified into a magnetic induction method, an electromagnetic resonance method, and an RF transmission method using a short wavelength radio frequency.

In the magnetic induction method, when two coils are adjacent to each other and a current is supplied to one coil, a magnetic flux generated at this time causes an electromotive force to the other coils. As a technology, . The magnetic induction method has the disadvantage that it can transmit power of up to several hundred kilowatts (kW) and the efficiency is high, but the maximum transmission distance is 1 centimeter (cm) or less, so it is usually adjacent to the charger or the floor.

The self-resonance method is characterized by using an electric field or a magnetic field instead of using electromagnetic waves or currents. The self-resonance method is advantageous in that it is safe to other electronic devices or human body since it is hardly influenced by the electromagnetic wave problem. On the other hand, it can be used only at a limited distance and space, and has a disadvantage that energy transfer efficiency is somewhat low.

Short wavelength wireless power transmission - simply, RF transmission - takes advantage of the fact that energy can be transmitted and received directly in radio wave form. This technology is a RF power transmission system using a rectenna. Rectena is a combination of an antenna and a rectifier, which means a device that converts RF power directly into direct current power. That is, the RF method is a technique of converting an AC radio wave into DC and using it. Recently, as the efficiency has improved, commercialization has been actively researched.

Wireless power transmission technology can be applied not only to mobile, but also to various industries such as IT, railroad, and household appliance industry.

Recently, wireless power transmitters with a plurality of coils have been introduced to increase the recognition rate of a wireless power receiver placed on a charging bed. Each of the plurality of coils is implemented as a coil wound with a large number of turns in order to increase the efficiency of wireless power transmission. Such coils have high resistance due to the proximity effect. Therefore, the power transmission efficiency is deteriorated due to the high resistance.

In addition, a short phenomenon may occur in which the adjacent conductors of the coils come into contact with each other. If the coils are exposed to the outside, foreign substances can affect the coils. As a result, normal operation of the coils may be impossible. Efforts are needed to prevent the phenomenon.

It is an object of the present invention to provide a transmission coil forming apparatus, a transmission coil module, and a manufacturing method thereof for a wireless power transmitter.

Another object of the present invention is to provide a transmission coil forming apparatus, a transmission coil module, and a manufacturing method thereof for a wireless power transmitter capable of optimizing the wireless power transmission efficiency.

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.

An apparatus for forming a transmission coil of a wireless power transmitter according to an embodiment of the present invention includes a transmission coil receiving unit for receiving a transmission coil for transmission of radio power inserted through a transmission coil insertion unit; And a transmission coil guide for physically separating adjacent ones of the transmission coils.

According to an embodiment, the transmission coil guide may have a predetermined width such that a quality factor of the transmission coil is optimized.

According to the embodiment, the transmitting coil receiving portion may have the same width as the diameter of the transmitting coil.

According to the embodiment, the transmitting coil receiving portion may have a height equal to 1/2 of the diameter of the transmitting coil.

A transmission coil module of a wireless power transmitter according to an embodiment of the present invention includes: a transmission coil for transmission of wireless power; A first transmission coil forming unit including a first transmission coil receiving unit for receiving the transmission coil inserted through a transmission coil inserting unit and a first transmission coil guide for physically separating adjacent ones of the transmission coils from each other; And a second transmission coil forming apparatus having a structure symmetrical with the first transmission coil forming apparatus and attached to the first transmission coil forming apparatus.

A method of manufacturing a transmission coil module of a wireless power transmitter according to an embodiment of the present invention includes a first transmission coil receiving portion for receiving a transmission coil for transmission of radio power, Generating a first transmission coil forming device including a first transmission coil guide for separating the first transmission coil guide and the second transmission coil guide; Generating a second transmission coil forming apparatus having a structure symmetrical with the first transmitting coil forming apparatus; Attaching the first transmission coil forming apparatus and the second transmission coil forming apparatus so that their corresponding surfaces are in contact with each other; And inserting the transmission coil into one transmission coil receiving portion formed by attaching the first transmission coil forming device and the second transmission coil forming device.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And can be understood and understood.

The effect of the device according to the present invention will be described as follows.

According to the transmission coil forming apparatus, the transmission coil module, and the method for fabricating the transmission coil of the wireless power transmitter according to the embodiment of the present invention, the interval between the adjacent coils of the transmission coils is maintained at a predetermined interval, It can be manufactured to have a quality factor.

In addition, a short circuit phenomenon can be prevented by physically separating the conductors adjacent to each other in the transmission coil.

In addition, it is possible to prevent the transmission coil from being contaminated by foreign substances by protecting it from the outside.

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 diagram for explaining a sensing signal transmission procedure in a wireless power transmitter according to an embodiment of the present invention.
2 is a state transition diagram for explaining a wireless power transmission procedure defined in the WPC standard.
3 is a state transition diagram for explaining a wireless power transmission procedure defined in the PMA standard;
4 is a diagram for explaining an electromagnetic induction type wireless charging system according to an embodiment of the present invention.
5 is a view illustrating a transmission coil forming apparatus for fabricating a transmission coil module according to an embodiment of the present invention.
6 to 9 are views for explaining a manufacturing method of a transmission coil module according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an apparatus and various methods to which embodiments of the present invention 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.

In the description of the embodiment, in the case where it is described as being formed "above" or "below" each element, the upper or lower (lower) And that at least one further component is formed and arranged between the two components. Also, in the case of "upper (upper) or lower (lower)", it may include not only an upward direction but also a downward direction based on one component.

In the description of the embodiments, an apparatus for transmitting wireless power on a wireless power system includes a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a wireless power transmitter, a transmitter, a transmitter, a transmitter, A wireless power transmission device, a wireless power transmitter, and the like are used in combination. Also, for the sake of convenience of explanation, it is to be understood that a wireless power receiving apparatus, a wireless power receiving apparatus, a wireless power receiving apparatus, a wireless power receiving apparatus, a receiving terminal, a receiving side, a receiving apparatus, Etc. may be used in combination.

The transmitter according to the present invention may be configured as a pad type, a cradle type, an access point (AP) type, a small base type, a stand type, a ceiling embedded type, a wall type, Power can also be transmitted. To this end, the transmitter may comprise at least one radio power transmission means. Here, the radio power transmitting means may be various non-electric power transmission standards based on an electromagnetic induction method in which a magnetic field is generated in a power transmitting terminal coil and charged using an electromagnetic induction principle in which electricity is induced in a receiving terminal coil under the influence of the magnetic field. Here, the wireless power transmission means may include an electromagnetic induction wireless charging technique defined by Wireless Power Consortium (WPC) and Power Matters Alliance (PMA), which are standard wireless charging technologies.

Also, a receiver according to an embodiment of the present invention may include at least one wireless power receiving means, and may receive wireless power from two or more transmitters at the same time. Here, the wireless power receiving means may include an electromagnetic induction wireless charging technique defined by Wireless Power Consortium (WPC) and Power Matters Alliance (PMA), which are standard wireless charging technologies.

The receiver according to the present invention may be used in 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, A portable electronic device such as a toothbrush, an electronic tag, a lighting device, a remote control, a fishing rod, a smart watch, etc. However, the present invention is not limited thereto. It suffices.

1 is a diagram for explaining a sensing signal transmission procedure in a wireless power transmitter according to an embodiment of the present invention.

Referring to FIG. 1, the wireless power transmitter may be equipped with three transmission coils 111, 112, and 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. 1, the wireless power transmitter sequentially transmits a sensing signal 117 through a primary sensing signal transmission procedure shown in a reference numeral 110, and outputs a signal strength indicator (Signal Strength Indicator 116 may identify the received transmit coil 111, 112. Subsequently, the wireless power transmitter sequentially transmits the sensing signal 127 through the secondary sensing signal transmission procedure shown at 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. 1, 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 reference numerals 110 and 120 of FIG. 1, Selects a transmission coil having the best alignment based on the signal strength indicator 126 received in each of the first transmission coil 111 and the second transmission coil 112 and performs wireless charging using the selected transmission coil .

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

Referring to FIG. 2, power transmission from a transmitter to a receiver according to the WPC standard is largely divided into a selection phase 210, a ping phase 220, an identification and configuration phase 230, And a power transfer phase (240).

The selection step 210 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 210, 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 220 (S201). In the selection step 210, 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 220, the transmitter activates the receiver when an object is detected, and transmits a digital ping to identify whether the receiver is a WPC compliant receiver. If the transmitter does not receive a response signal to the digital ping (e.g., a signal strength indicator) from the receiver in step 220, the process may transit to the selection step 210 again (step S202). In addition, in the step 220, when the transmitter receives a signal indicating completion of power transmission from the receiver, that is, a charge completion signal, the transmitter may transition to the selection step 210 (S203).

Once the ping step 220 is complete, the transmitter may transition to an identification and configuration step 230 to collect receiver identification and receiver configuration and status information (S204).

In the identifying and configuring step 230, the transmitter determines whether a packet is received or unexpected, a desired packet is not received for 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 210 (S205).

Once the identification and configuration for the receiver is complete, the transmitter may transition to power transfer step 240, which transmits wireless power (S206).

In a power transfer step 240, the sender may send an unexpected packet, a desired packet is not received for a predefined time (time out), a violation of a predetermined power transmission contract occurs transfer contract violation, and if the charging is completed, the selection step 210 can be transited (S207).

Also, in power transfer step 240, if the transmitter needs to reconfigure a power transfer contract based on transmitter state changes, etc., it may transition to identification and configuration step 230 (S208).

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.

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

Referring to FIG. 3, the power transmission from the transmitter to the receiver according to the PMA standard is largely divided into a standby phase 310, a digital ping phase 320, an identification phase 330, A Power Transfer Phase 340, and an End of Charge Phase 350.

The waiting step 310 may be a step of performing a receiver identification procedure for power transmission or a transition if a specific error or a specific event is detected while maintaining a power transmission. Here, the specific error and the specific event will become clear through the following description. Also, at the standby step 310, 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 pinging step 320 may proceed (S301). Here, RXID is a unique identifier assigned to a PMA compatible receiver. At the standby step 310, 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 ping stage 320 sends a digital finger signal to identify whether the sensed object is a PMA compatible receiver. When sufficient power is supplied to the receiving end by the digital ding signal transmitted by the transmitter, the receiver can modulate the received digital ding 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 320, the receiver may transition to an identification step 330 if a valid response signal is received (S302).

If the response signal is not received or it is determined that it is not a PMA compatible receiver, i.e., it is a Foreign Object Detection (FOD), at step 310, the transmitter may transition to the wait step 310 (S303). As an example, a foreign object (FO) may be a metallic object including coins, keys, and the like.

In the identifying step 330, the transmitter may transition to the waiting step 310 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 S304).

If the transmitter succeeds in identifying the receiver, the transmitter may transition to power transfer step 340 in the identification step 330 and initiate charging (S305).

In a power transfer step 340, if the desired signal is not received within a predetermined time (Time Out), a foreign object (FO) is detected, or the voltage of the transmit coil exceeds a predefined reference value, (S306). ≪ / RTI >

In addition, in the power transmission step 340, if the temperature sensed by the temperature sensor provided inside the transmitter exceeds a predetermined reference value, the transmitter may transition to the charging completion step 350 (S307).

In the charge completion step 350, if the transmitter is confirmed that the receiver has been removed from the charging surface, the transmitter may transition to the standby state 310 (S309).

Also, if the measured temperature drops below the reference value in the over temperature state, the transmitter may transition from the charging completion step 350 to the digital charging step 320 (S310).

In the digital ping phase 320 or power transmit phase 340, the transmitter may transition to the charge completion phase 350 (S308 and S311) when an End Of Charge (EOC) request is received from the receiver.

4 is a diagram for explaining an electromagnetic induction type wireless charging system according to an embodiment of the present invention.

Referring to FIG. 4, an electromagnetic induction wireless charging system includes a wireless power transmitter 400 and a wireless power receiver 450. The wireless power transmitter 400 and the wireless power receiver 450 are substantially identical to the wireless power transmitter and wireless power receiver described in FIG.

Placing the electronic device including the wireless power receiver 450 on the wireless power transmitter 400 allows the coils of the wireless power transmitter 400 and the wireless power receiver 450 to be coupled together by an electromagnetic field.

The wireless power transmitter 400 can modulate the power signal and change the frequency to create an electromagnetic field for power transmission. The wireless power receiver 450 receives the power by demodulating the electromagnetic signal according to the protocol set for the wireless communication environment and controls the power of the wireless power transmitter 400 based on the received power And transmit the feedback signal to the wireless power transmitter 400 via in-band communication. For example, the wireless power transmitter 400 may control the operating frequency according to a control signal for power control to increase or decrease the transmitted power.

The amount of power transmitted (or increased / decreased) may be controlled using a feedback signal transmitted from the wireless power receiver 450 to the wireless power transmitter 400. The communication between the wireless power receiver 450 and the wireless power transmitter 400 is not limited to the in-band communication using the feedback signal described above, -of-band communication. For example, short-range wireless communication modules such as Bluetooth, Bluetooth Low Energy (BLE), NFC, and Zigbee may be used.

In the electromagnetic induction method, a frequency modulation scheme may be used as a protocol for exchanging state information and control signals between the wireless power transmitter 400 and the wireless power receiver 450. Device identification information, charge status information, power control signals, etc. may be exchanged through the protocol.

As shown in FIG. 4, the wireless power transmitter 400 according to an embodiment of the present invention includes a signal generator 420 for generating a power signal, a controller 420 for detecting a feedback signal transmitted from the wireless power receiver 450, A coil L1 and capacitors C1 and C2 located between the power supply terminals V_Bus and GND and switches SW1 and SW2 whose operation is controlled by the signal generator 420. [ The signal generator 420 includes a demodulator 424 for demodulating the feedback signal transmitted through the coil L1, a frequency driver 426 for changing frequency, a control unit 424 for controlling the frequency driver 426, And a transmission control unit 422 for controlling the transmission. The feedback signal transmitted through the coil L1 is demodulated by the demodulation unit 424 and then input to the transmission control unit 422. The transmission control unit 422 controls the frequency driving unit 426 based on the demodulated signal The frequency of the power signal transmitted to the coil L1 can be changed.

The wireless power receiver 450 includes a modulator 452 for transmitting a feedback signal through a coil L2, a rectifier 454 for converting an AC signal received via the coil L2 into a DC signal, And a receiving controller 460 for controlling the modulating unit 452 and the rectifying unit 454. The receive controller 460 includes a power supply 462 for supplying power necessary for operation of the rectifier 454 and other wireless power receivers 450 and a rectifier 454 for outputting the output DC voltage to the charge object A DC-DC converting unit 464 for changing to a DC voltage meeting the charging requirement, a load 468 for outputting the converted power, and a receiving power state and a charging target state to the wireless power transmitter 400 And a feedback communication unit 466 for generating a feedback signal for the feedback signal.

In FIG. 4, the coil L1 included in the wireless power transmitter 400 refers to the three transmission coils 111, 112 and 113 shown in FIG. 1, and the switch L1 connected to the transmission coils 111, SW1 and SW2 and the capacitors C1 and C2 may be provided independently for each of the transmission coils 111, 112 and 113, but the scope of the present invention is not limited thereto.

5 is a view illustrating a transmission coil forming apparatus for fabricating a transmission coil module according to an embodiment of the present invention.

5, the transmission coil forming apparatus 500 includes a transmission coil insertion unit 510, a transmission coil receiving unit 520, a transmission coil guide 530, an upper substrate 540, and a fixing mechanism insertion unit 550 ).

The transmitting coil forming apparatus 550 is combined with another transmitting coil forming apparatus having a symmetrical shape so as to insert the transmitting coil through the transmitting coil inserting unit 510 and push the transmitting coil into the transmitting coil forming apparatus 550 together with the transmitting coil having a predetermined shape And a device capable of protecting the transmission coil.

The transmitting coil inserting unit 510 can provide a space for pushing one end of the transmitting coil and inserting it. For example, the transmission coil can be realized with a material having a property of bending with conductivity (copper (Cu)), which is fitted to the shape of the space when it is pushed into a long space similar to the diameter of the material Can be inserted continuously.

The transmitting coil receiving portion 520 may be inserted into the transmitting coil inserting portion 510 to provide a space for accommodating the transmitting transmitting coil and may have a spiral patterned coil shape having a width equal to or greater than a predetermined thickness of the coil have. The transmitting coil receiving portion 520 may be integrally connected to the transmitting coil inserting portion 520 to continuously insert the transmitting coil past the transmitting coil inserting portion 510.

The depths of the transmission coil insertion portion 510 and the transmission coil receiving portion 520 may be equal to or slightly larger than 1/2 of the diameter of the lead wire of the transmission coil, but the scope of the present invention is not limited thereto.

The transmission coil guide 530 is configured to separate the space in which the inner conductor of the transmission coil inserting portion 510 is accommodated from the space in which the outer conductor is accommodated. Accordingly, the inner conductor and the outer conductor can be electrically separated from each other by the transmission coil guide 530, and the width of the transmission coil guide 530 can be adjusted to optimize the wireless power transmission efficiency and the proximity effect have.

The upper substrate 540 is an area excluding the transmitting coil inserting unit 510, the transmitting coil receiving unit 520, the transmitting coil guide 530 and the fixing mechanism inserting unit 550, ≪ / RTI >

The fixture inserting section 550 provides a space into which a fixing mechanism for allowing the transmission coil forming apparatus 500 and other transmission coil forming apparatuses having a symmetrical shape to be fixed so that portions corresponding to each other can be fixed . The fixing mechanism may be, for example, a bolt and a nut, but the scope of the present invention is not limited thereto.

If it is not symmetrically fixed through the fixture inserting portion 550, the transmitting coil will not normally be inserted into the transmitting coil former 500.

The transmission coil forming apparatus 550 can be manufactured by pressing a substrate made of acrylic or plastic, but the scope of the present invention is not limited thereto.

6 to 9, a method of manufacturing the transmission coil module 900 using the transmission coil forming apparatus 550 will be described, and a structure corresponding to a partial cross section CT of FIG. 5 will be mainly described.

6 to 9 are views for explaining a manufacturing method of a transmission coil module according to an embodiment of the present invention.

Referring to FIG. 6, there is shown a structure corresponding to a partial cross-section (CT) of FIG. 5 of a first transmission coil forming apparatus 600 having the same structure as the transmission coil forming apparatus 550. The first transmission coil forming apparatus 600 has the same structure as the transmission coil forming apparatus 500 shown in FIG. 5, but a structure corresponding to a partial cross section CT of FIG. 5 will be described for convenience of explanation.

The first transmission coil forming apparatus 600 includes a first transmission coil receiving portion 620 formed to receive a transmission coil, a first transmission coil guide 630 for maintaining a gap between adjacent wires, 640, and a first bottom substrate 650.

The first lower substrate 650 is integrally formed with the first transmission coil guide 630 and the first upper substrate 640 to support the first transmission coil guide 630 and the first upper substrate 640 have.

The width W1 of the first transmission coil receiving portion 620 may be equal to or larger than the diameter of the transmission coil to be received. For example, when the diameter of the transmission coil is 0.83 mm, the width W1 of the first transmission coil receiving portion 620 may be 0.83 to 0.87 mm.

The height D of the first transmission coil receiving portion 620 may be equal to 1/2 of the diameter of the transmission coil or may be larger than 1/2 of the diameter so as to have some margin. For example, when the diameter of the transmission coil is 0.83 mm, the height D1 of the first transmission coil receiving portion 620 may be 0.415 to 0.435 mm.

The reason why the height D of the first transmission coil receiving portion 620 is 1/2 of the diameter is because the first transmission coil forming apparatus 600 is connected to the first transmission coil forming apparatus 600 Since the transmission coil 910 is inserted into the space formed by abutting the second transmission coil forming device 700 symmetrical with the second transmission coil forming device 700. [

When the width W1 and the height D of the first transmission coil receiving portion 620 are equal to 1/2 of the diameter and diameter of the transmission coil, the transmission coil is fixed at a desired position and the gap between the wires is maintained well However, there may be a difficulty in the process of inserting the transmission coil, so that some margin may be required.

The width W2 of the first transmission coil guide 630 may be equal to a predetermined interval between adjacent ones of the transmission coils.

The proximity effect is a phenomenon occurring between adjacent lines. Specifically, the proximity effect is a phenomenon in which the magnetic flux density in the space between the two conductors increases, and the high-frequency current flows more concentratedly near the other conductors, thereby increasing the AC resistance of the conductors. The proximity effect may become larger as the interval between the wires becomes narrower.

Therefore, as the distance between adjacent conductors increases, the proximity effect may be reduced. However, if the distance between adjacent conductors is widened, the effective area of the transmission coil is reduced. The effective area means a ratio of an area through which a current flows per unit area. If the effective area is reduced, the AC resistance can be increased.

That is, the AC resistance that affects the quality factor of the transmit coil may have a smaller value as the proximity effect decreases and as the effective area increases. As the spacing between adjacent conductors increases, the proximity effect is reduced but the effective area is reduced. Therefore, in order for the transmission coil to have a desired quality factor, it is necessary that the interval between adjacent conductors be fixed to an appropriate value.

That is, the width W2 of the first transmission coil guide 630 that determines the interval between adjacent conductors may be determined to be a value experimentally determined in advance so that the transmission coil has a desired quality factor.

7, a structure corresponding to a partial cross section CT of FIG. 5 of a second transmission coil forming apparatus 700 having a structure symmetrical with the transmission coil forming apparatus 550 is shown. The second transmission coil forming apparatus 700 has a structure symmetrical with the transmission coil forming apparatus 500 shown in FIG. 5, but a structure corresponding to a partial cross section CT of FIG. 5 will be described for convenience of description .

The second transmission coil forming apparatus 700 includes a second transmission coil receiving portion 720 formed to receive a transmission coil, a second transmission coil guide 730 for maintaining a gap between adjacent wires, 740, and a second bottom substrate 750.

The second transmission coil forming apparatus 700 may be formed symmetrically with the first transmission coil forming apparatus 600 about the upper surface of the second upper substrate 740.

In FIG. 8, the first transmission coil forming apparatus 600 and the second transmission coil forming apparatus 700 may be attached so that their corresponding surfaces are in contact with each other.

The first transmission coil forming apparatus 600 and the second transmission coil forming apparatus 700 are attached to each other by a method using a separate adhesive sheet (for example, double-sided tape) or a method of applying a synthetic resin having adhesive force and insulation Method (bonding method), and the like, but the scope of the present invention is not limited thereto.

The first transmission coil receiving portion 620 and the second transmission coil receiving portion 720 of each of the first transmission coil forming device 600 and the second transmission coil forming device 700 are connected to one transmission coil receiving portion 800, Can be formed.

As described above, the height of each of the first transmission coil receiving portion 620 and the second transmission coil receiving portion 720 is equal to or slightly larger than 1/2 of the diameter of the transmitting coil, so that the height of the transmitting coil receiving portion 800 It may be equal to or slightly larger than the diameter of the transmitting coil.

9, the transmission coil 910 can be inserted through the insertion port formed by the transmission coil insertion unit of each of the first transmission coil forming apparatus 600 and the second transmission coil forming apparatus 700.

The mutually adjacent conductors of the inserted transmission coil 910 may have the same interval as the width W2 of the first transmission coil guide 630.

The width W2 of the first transmission coil guide 630 may be gradually different from the inside of the transmission coil 910 toward the outside.

According to the experimental results, the first transmission coil forming apparatus 600 and the second transmission coil forming apparatus 600 are arranged such that the depth of the first transmission coil receiving section 620 and the width W2 of the first transmission coil guide 630 are 0.415 mm and 0.2 mm, 2 transmission coil forming apparatus 700 and a transmitting coil 910 having a diameter of 0.83 mm were inserted, the AC resistance (ACR) was 0.134 ohms and the quality factor was measured as 38.88.

On the contrary, when the transmission coil 910 having a diameter of 0.83 mm is formed by spirally winding without the first transmission coil forming apparatus 600 and the second transmission coil forming apparatus 700, the AC resistance (ACR) The factor was measured as 30.54.

Therefore, the transmission coil module 900 can optimize the performance of the transmission coil 910 by keeping the intervals between adjacent ones of the transmission coils 910 at predetermined intervals. The predetermined interval may be determined to have an optimum quality factor in consideration of the use, purpose, and the like of the transmission coil module 900.

A shielding member for shielding the magnetic field formed by the transmission coil 910 may be attached to one side of the transmission coil module 900. The method of attaching may be a method using a separate adhesive sheet (for example, a double-sided tape) or a coating method (bonding method) of a synthetic resin having an adhesive force and an insulating property, but the scope of the present invention is not limited thereto. Further, the shielding agent may be a ferrite sheet, but the scope of the present invention is not limited thereto.

One side of the transmission coil module 900 and the shielding agent may include at least one hole through which a wire connected to the transmission coil 910 can pass. The transmission coil module 900 with the shielding material may be attached to a printed circuit board (PCB), and the transmission coil 900 may be connected to the control circuit board through a connector mounted on the PCB. The control circuit board corresponds to the substrate including the configurations for controlling the operation of the wireless power transmitter 400 such as the switches SW1 and SW2 and the signal generator 420. [

The transmission coil 900 can maintain the spacing between adjacent ones of the transmission coils 900 at a predetermined interval so that the transmission coil 900 can transmit an optimal quality factor ).

In addition, it is possible to physically separate the conductors adjacent to each other in the transmission coil 900 to prevent a short-circuit phenomenon.

In addition, it is possible to protect the transmission coil 900 from the outside and prevent it from being contaminated by foreign matter.

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.

500: Transmission coil forming device
510: transmitting coil inserting portion
520: transmitting coil receiving portion
530: Transmission coil guide
540: upper substrate
550: Fixture mechanism insertion portion

Claims (13)

A transmission coil receiving portion for receiving a transmission coil for transmission of radio power inserted through a transmission coil inserting portion; And
And a transmission coil guide for physically separating adjacent ones of the transmission coils. The method according to claim 1,
The transmission coil guide
Wherein the transmission coil has a predetermined width such that a quality factor of the transmission coil is optimized. The method according to claim 1,
Wherein the transmitting coil receiving portion has the same width as the diameter of the transmitting coil. The method according to claim 1,
Wherein the transmitting coil receiving portion has a height equal to 1/2 of a diameter of the transmitting coil. A transmit coil for transmitting wireless power;
A first transmission coil forming unit including a first transmission coil receiving unit for receiving the transmission coil inserted through a transmission coil inserting unit and a first transmission coil guide for physically separating adjacent ones of the transmission coils from each other; And
And a second transmission coil forming device having a structure symmetrical with the first transmission coil forming device and attached to the first transmission coil forming device. 6. The method of claim 5,
Wherein the first transmitting coil receiving portion and the second transmitting coil receiving portion of the second transmission coil forming device form one transmitting coil receiving portion. The method according to claim 6,
Wherein the transmitting coil receiving portion has a width equal to the diameter of the transmitting coil. The method according to claim 6,
Wherein the transmitting coil receiving portion has the same height as the diameter of the transmitting coil. 6. The method of claim 5,
The first transmission coil guide includes:
Wherein the transmit coil has a predetermined width such that a quality factor of the transmit coil is optimized. A first transmission coil forming unit including a first transmission coil receiving part for receiving a transmission coil for transmission of radio power and a first transmission coil guide for physically separating the adjacent coils of the transmission coil step;
Generating a second transmission coil forming apparatus having a structure symmetrical with the first transmitting coil forming apparatus;
Attaching the first transmission coil forming apparatus and the second transmission coil forming apparatus so that their corresponding surfaces are in contact with each other; And
And inserting the transmitting coil into one transmitting coil receiving portion formed by attaching the first transmitting coil forming device and the second transmitting coil forming device. 11. The method of claim 10,
The first transmission coil guide includes:
Wherein the transmission coil has a predetermined width such that a quality factor of the transmission coil is optimized. 11. The method of claim 10,
Wherein the transmitting coil receiving portion has a width and a height equal to the diameter of the transmitting coil. 11. The method of claim 10,
Further comprising the step of attaching a shield to one side of the transmission coil module.

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