KR20190092203A - Apparatus for autonomous wireless charging with high hardware and cost efficiency - Google Patents

Abstract

The present invention relates to an autonomous wireless charging device and, more specifically, to a high precision autonomous wireless charging device based on a tray-typed case which autonomously recognizes a center location of a reception coil of a wireless device having a battery, which is placed on a charger pad, mounted thereon in terms of performance, and accurately moves a transmission coil of a charger to the location so as to always match the centers of the reception coil and the transmission coil when a location change of the wireless device occurs, thereby maintaining maximum wireless charging efficiency. The autonomous wireless charging device based on a tray-typed case having high efficiency of hardware and high efficiency of costs is moved to a predetermined stroke in all directions in a stroke zone in order to increase hardware efficiency (HW efficiency) to a predetermined value or more in terms of a device, optimally adjusts the wireless device located on the pad, and provides maximum wireless charging efficiency.

Description

Hardware and cost-effective autonomous wireless charging device {APPARATUS FOR AUTONOMOUS WIRELESS CHARGING WITH HIGH HARDWARE AND COST EFFICIENCY}

The present invention relates to an autonomous wireless charging device, and more particularly, in terms of performance, even when the charger autonomously recognizes the center position of a receiving coil of a wireless device equipped with a battery placed on a charger pad. It is a tray type high precision autonomous wireless charger that maintains the best wireless charging efficiency by precisely moving the transmitting coil of the charger to the position and always matching the center of the transmitting and receiving coils. High efficiency and cost-effectiveness of hardware that can provide the best wireless charging efficiency by optimally adapting to the wireless devices located on the pad while moving only a certain stroke in the stroke zone in the stroke zone to increase the HW efficiency by more than a certain value. Tray-based autonomy It relates to a wireless charging device.

In the magnetic induction energy transmission, the near-field energy of the transmission induction coil is coupled to the reception induction coil in the electromagnetic wave, thereby achieving efficient energy transmission.

The transmission of energy is caused by the coupling energy from the near field of the power transmission induction coil to the receiving induction coil which is within a predetermined distance.

However, most existing magnetic induction wireless chargers are designed to be charged by the user's efforts to locate the wireless device at the correct location. Therefore, the optimal wireless charging efficiency is not always maintained and the charging time is also shortened. Has not been.

As shown in FIG. 1 and Patent Documents 00013 to 00016, the wireless charger that moves the coil has a very high cost because the circuit for detecting the position of the wireless device located on the pad uses a detection circuit having a size almost similar to that of the pad area. The disadvantage is that it is not efficient.

In addition, due to the structure of the moving device mechanism, there is a dead zone that does not even wirelessly charge, and economical deterioration due to a large number of parts, a relatively long distance from the standby position to the receiving coil detection position or vice versa. Therefore, as a result of using a drive device having a high rpm, noise is generated, motor capacity is increased due to one-sided driving, and when the drive unit and the transmission coil are separated, a number of disadvantages occur.

Therefore, various chargers for free mounting of wireless devices on pads are proposed, but they are not fully performed and are not cost effective.

Therefore, there is a need for wireless charging systems and methods that solve the major disadvantages and inconveniences presented above systematically and transmit power efficiently and safely.

Conventional flat flat case-based wireless chargers charge even when the wireless device is mounted over the edge part, so that the stroke zone in which the transmission coil moves is larger than that of the wireless device located in the pad. Will have

Therefore, if it spans the edge of a flat case pad, the TX coil should move as quickly as possible to the position where the TX coil can move to align with the RX coil of the wireless charger. I bear the burden.

In addition, there is a problem that a relatively loud noise occurs in the process of moving for a long time to a far position of the flat pad.

In addition, in the case of a flat pad, basically, when necessary, the center of the transmission coil of the charger should be moved to the center of the receiving coil of the wireless device including the battery at any time, and the optimum charging efficiency is guaranteed even when the wireless device is placed in the pad. Due to the burden, the material costs are excessively high, and the parts cost is excessive, resulting in undesirable problems in operating power size and durability.

In addition, as shown in Patent Document 0005, in many cases, a wireless charging unit system for a car interior is installed and used inside the front console of a car, but due to the nature of a moving car, a driving environment in which the location of a smartphone mounted in a car can be easily displaced. , Curves, sudden stops, etc.), away from the center of the charging pad, the charging efficiency drops rapidly, preventing normal charging, and even heat is generated severely. It takes the form of automatic stop.

This refers to the three-coil random-mounted wireless charging service that is currently used in most car interiors, and in fact, the freedom and stability of charging from the user's point of view is still very limited.

Furthermore, all current car indoor wireless charger units are limited to normal charging depending on the smartphone model. For most existing wireless charging consoles (classified as horizontal retractable, inclined stand and pocket consoles), the center position of all types of smartphone receiver coils can be centered on the center of the transmission coil of a fixed charger. Because there is not.

Therefore, the reality is that each automaker has a problem with unwillingness, discomfort, and inadequacy to inform customers of models that cannot be charged according to the WXL dimension of smartphones in every console type that holds smartphones. to be.

At present, the global automobile market manufactures and sells 80 car models equipped with a wireless charging function, but has not provided a wireless charging technology that provides 'deterministic convenience, stability and naturalness' in the car.

Korean Laid-Open Patent No. 2014-0067101 (2014.6.3.) Korean Patent Publication No. 2014-0085591 (2014.7.7) Korean Laid-Open Patent No. 2015-0054887 (2015.5.20) Korean Laid-Open Patent No. 2017-0008800 (2017.1.24) Korea Patent Registration No. 1701054 (2017.1.23) Korean Laid-Open Patent No. 2012-0099571 (2012.7.11) Korean Registered Patent No. 0815135 (2008.6.18) Korean Registered Patent No. 1250290 (2013.3.28) Korean Patent Publication No. 2008-0081480 (2008.9.10) Korean Laid-Open Patent No. 2012-0014878 (2012.2.20) Korean Patent Publication No. 2014-0019955 (2014.2.18) Chinese Patent Publication No. 102882243 (2013.01.16) United States Patent No. 8981719 (2015.03.17) U.S. Patent # 9018900 (April 28, 2015) United States Patent No. 9312711 (2016.4.12) United States Patent No. 9853484 (2017.12.26)

The present invention transmits only in the stroke dimension to solve the problem of inefficient hardware, such as the large area of the power receiving coil position detection circuit, the structural problem in which there is a blind spot that is not wireless charging, consequently cost-effective It is an object of the present invention to provide an autonomous wireless charging device having improved hardware and cost efficiency in the size of the implementation area of the position detection unit circuit through the structure of moving the coil.

Another object of the present invention is to provide an autonomous wireless charging device capable of precisely tracking the center position of a power receiving coil of a wireless device by installing a power receiving coil and a PDU circuit board and a PDU / PDUP combo circuit board which are sensitive to a position.

In addition, the present invention by inserting the X-axis motor and Y-axis motor in the through hole connecting between the slider and the Y-axis rail, between the Y-axis rail and the X-axis rail without being obstructed to move along the X-axis rail and Y-axis rail The purpose is to provide an autonomous wireless charging device that can produce as slim as possible.

In addition, the present invention, even if the wireless device is placed anywhere in the case through the foreign matter detection (FOD) algorithm, the power transmission coil can be charged in a certain time in the direction of the detected position through the periodic power loss value monitoring to charge the wireless device An object of the present invention is to provide an autonomous wireless charging device.

In addition, the present invention is a tray-type wireless charger based on the structure that reduces the stroke zone by about four times or more compared to the conventional flat type (Flat type) by significantly reducing the transmission coil travel distance and time for optimal charging The aim is to provide a hardware and cost-effective autonomous wireless charging device that enables the implementation of small, rugged devices of size.

In order to solve the above problems, the present invention provides a hardware and a cost-effective autonomous wireless charging device employing a tray-type case, including a mobile device for moving the power transmission coil to a position detected by the PDU circuit board, The transmission coil is moved only in the stroke dimension, which is located at the center of the autonomous wireless charging device and can move in the up, down, left, and right directions.

The autonomous wireless charging apparatus further includes a PDU circuit board for detecting a location of the wireless device therein, and charges the wireless device by moving a transmission coil corresponding to the PDU circuit board only within the stroke dimension.

By installing a PDU / PDUP combo circuit board combining a position detection unit plate (PDUP) formed by extending only a board without an electrical circuit to the PCB of the PDU circuit board, the center position of the power receiver coil of the wireless device can be tracked.

The moving device uses an X-Y guide using a slide bearing method in which a drive unit is disposed between the guide rail and the slider.

In the process of finding the location of the wireless charging device, when the location of the wireless device is changed by external vibration or shock, the digital current meter is used to recognize the moment when a sudden current change occurs. It is a process to autonomously charge the wireless device by tracking the center position of the transmitter and moving the transmission coil in the direction of the detected position by periodically monitoring the power loss value using the power loss method used to detect foreign substances. .

The present invention made as described above improves the optimal charging efficiency of a given system, even if the coil movement method is applied to the wireless charger employing a tray type case, even if the movement space of the coil is limited to the stroke zone. Can shorten the charging time.

In addition, in the present invention, the tray-type case reduces the stroke zone of the moving device by about 4 times or more, as compared to the flat case, thereby reducing the size and moving distance of the moving device, thereby enabling the mounting of additional circuit boards. Since sufficient space can be secured, assembling property can be improved and the lamination thickness of a filling device can be reduced.

In addition, the present invention has a structure in which a drive unit (driving motor, rack and pinion gear) is disposed between the guide rail (X, Y-axis rail) and the slider to remove the blind spot, stable driving when applied to a car (smooth movement, noise) Removal).

In addition, the present invention can provide the features of the hardware and cost efficiency increase, such as hardware cost savings, power savings by allowing the coil installed in the basement to move only a certain stroke zone to charge the electric vehicle parked in the parking line.

In addition, the present invention can be used in a variety of devices or devices or vehicles using a wireless charging in a limited space as well as a tray-type case to define the mounting position of the wireless device is very wide range of use.

1 is a view showing an example of the movement trajectory toward the power receiving coil of the power transmission coil according to the prior invention.
2 and 3 are diagrams showing the internal configuration of the hardware and cost-effective autonomous wireless charging device according to an embodiment of the present invention and an example of the movement trajectory of the power transmission coil toward the power receiving coil.
4 is a diagram illustrating a layout of a free space, a PDU / PDUP, and a mobile device according to an embodiment of the present invention.
5 is a view showing in detail the transparent design and configuration of the mechanism of the wireless charger mobile device in an embodiment of the present invention.
6 is a view showing an X-axis rack gear and a gear fixed to the X-axis rail according to an embodiment of the present invention.
7 is a view showing an embodiment of three types of console (horizontal storage console, inclined stand console, pocket console) mounted on the tray-type case for charging the smartphone according to an embodiment of the present invention.
8 is a view showing the presence range of the power receiving coil according to the location of the smartphone in the charging pad of the tray-type case according to an embodiment of the present invention.
FIG. 9 is a view showing the range of the trajectory of the center of the faucet coil and the surface trajectory of the faucet coil when the smartphone is randomly mounted on the pad of the tray type wireless charger according to an embodiment of the present invention, and showing the stroke zone formation. to be.
FIG. 10 is a flowchart illustrating an operation flow of moving a faucet coil to a faucet coil by tracing the center position of the faucet coil by a detection circuit board (PDU circuit board) having a ring counter and a switch on the X and Y axis according to an embodiment of the present invention. Figure showing.
FIG. 11 is a diagram illustrating a situation in which power loss occurs for FOD description according to the present invention.

In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Embodiment of the present invention may be modified in various forms, the scope of the invention should not be construed as limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those skilled in the art. Therefore, the shape of the elements in the drawings and the like may be exaggerated to emphasize a more clear description. It should be noted that the same members in each drawing are sometimes shown with the same reference numerals. In addition, detailed descriptions of well-known functions and configurations that are determined to unnecessarily obscure the subject matter of the present invention are omitted.

As shown in FIG. 2 and FIG. 3, the present invention provides a position detection unit (PDU) circuit board 2 and a PDUP including a transmission coil (TX coil) 1 and a transmission coil in a tray-shaped case having a flat inner space. (Position detection unit plate; C), the X-axis rail 21 and the Y-axis rail (22).

As a preferred embodiment of the present invention, a stroke zone which is located at the center of the hardware employing the tray-like case and the cost-effective autonomous wireless charging device and which can move in the up, down, left and right directions is to be located on the pad of the charger. The power transmission coil 1 is moved only in the possible range in which the center position of the power receiver coil exists.

Because moving the power transmission coil (1) not limited to the stroke zone can be charged to the wireless device (S) in all directions from the end to the end of the up, down, left and right directions, but from the end to the end of the up, down, left and right directions based on the tray case If it is not necessary to charge the wireless device located in the direction, it is reasonable to move the transmission coil by defining the stroke zone.

In addition, the present invention has a process of charging the wireless device by moving the power transmission coil in the direction of the detected position when the position is changed within a predetermined time or due to external vibration or shock. As a specific implementation method, if the power loss value changes more than a certain threshold value by monitoring the power loss value periodically by using the power loss method used to detect foreign substances in the power transmission step, the smartphone (wireless device) By tracking the position, the transmission coil is moved to a point where the center of the transmission coil coincides with the center of the reception coil of the smartphone.

Another embodiment of the present invention is basically a radio device by moving the center of the transmission coil of the autonomous wireless charging device with high hardware and cost-effective, whenever necessary in the stroke zone to the center position of the wireless device including the battery and the receiving coil In the PDU circuit board 2 having the closed structure including the stroke zone in which the power transmission coil 1 can move, the power supply coil 1 is located in the upper case, while ensuring optimal charging efficiency if the power supply coil is located only in the case. By moving only a certain stroke zone in the up, down, left, and right directions in the stroke zone, it is possible to shorten the moving time and the charging time of the power transmission coil.

The PDU circuit board 2 is located at the center of the hardware and cost-effective autonomous wireless charging device, and includes a stroke zone in which the transmission coil 1 can move by a predetermined stroke, so that the transmission coil 1 moves to the sensing position. To control the circuit.

Accordingly, the present invention solves the undesirable problem of moving the coil to the end of the plate in the vertical direction to charge the wireless device placed at the edge or the edge of the existing flat plate, while reducing the stroke zone by about 4 times smaller. The main structure can improve the overall system efficiency and performance.

In addition, a predetermined circuit may be installed in the PDUP (C) for fixing the PDU circuit board 2.

For example, if the PCB board width of the PDU circuit board 2 is 9.8 × 9.3 = 91.14 cm ² , and the actual stroke zone width is 6.5 × 6.5 = 42.25 cm ^2, then (91.14-42.25) / (91.14) = 53.64% Area can be saved.

In the stroke zone defining the movement range of the power transmission coil 1, the power transmission coil 1 which can move to the X-axis and the Y-axis can move quickly to detect the position of the power receiving coil of the wireless device.

That is, if the wireless device is located in the stroke zone, the position of the power receiving coil of the wireless device can be tracked only by the movement of the power transmission coil 1 in the PDU circuit board 2 of the smallest size.

For example, in the case of a stroke zone of 3 cm by 4 cm, the power transmission coil 1 may move vertically or horizontally within an area of 3 cm by 4 cm.

In addition, the PDU circuit board 2 is implemented with a PDU circuit over an area (Type # 2) such as a stroke dimension (Type # 1) or a PDUP dimension as shown in the figure.

Alternatively, as shown in FIG. 4, power transmission circuits, position detection, and mobile device control circuits may be installed in the spaces A and B, thereby solving the problem of double stacking and reducing the thickness of the wireless charging device.

In addition, the space C becomes a space where the smartphone position detection unit circuit board is installed. By installing a PDU circuit board in the center of space C having an area or area equal to the stroke of the moving device, the circuit cost can be greatly reduced.

However, the PDUP may be left as it is or a PDUP is made on the PDU PCB extension line, that is, the PDU + PDUP combo circuit board may be installed by combining with the PDUP (C) formed by extending only a board without an electrical circuit to the PDU circuit board PCB. .

In addition, as shown in FIG. 4, a PDU circuit board 2 having the same size as a PDUP dimension may be implemented. In order to improve an optimal charging efficiency of a given system, an internal device and a control scheme of a case may be changed.

As an embodiment of the present invention, when the PDU circuit board 2 is turned on by the control signal, the position of the wireless device is found. The PDU circuit board 2 is then turned off and the power transmission coil 1 is moved to the corresponding position, maximizing the optimal charging efficiency in a given charging system and thereby reducing the charging time.

In this case, the power transmission coil 1 may be moved instead of the PDU circuit board 2. For example, the PDU circuit board 2 and the power transmission coil 1 may move together, but may move separately.

In another embodiment, the PDU circuit board 2 moved in conjunction with the charging may move the power transmission coil 1 while being fixed in the center.

For example, when the PDU circuit board 2 is turned on, the position of the wireless device is found, the PDU circuit board 2 is turned off, and then the power transmission coil 1 is moved to the corresponding position.

That is, the power transmission coil, the power receiving coil (R) of the wireless charger to move on a specific moving body to be on the coaxial line to maintain the optimum charging efficiency.

Therefore, since the tray-type case according to the present invention has a structure that reduces the stroke zone of the moving device by about 4 times smaller than the conventional one, the size and moving distance of the moving device can be reduced, thereby reducing the size of the moving device and providing a solid compact device. Implementation is possible.

As an embodiment of the present invention, the process of finding the location of the wireless device may be performed by the MCU 100 when the positional displacement of the wireless device occurs due to external vibration or shock (mound, curve, sudden stop, etc. in the case of an automobile). It is a process of charging the wireless device by moving the transmission coil within a certain time in the direction of the detected position by periodically monitoring the power loss value using the power loss method used for the purpose.

Meanwhile, as shown in Table 1, W × L × T dimensions (unit: mm) for iPhone 4, 4S, 5, 5S, 6, 6Plus, 6S, 7, 8, 8Plus Series, and iPad touch (5th Gen.) are shown. In summary.

Model W × L × T iPhone 6S 67.1 138.3 7.1 iPhone 7 67.1 138.3 7.1 iPhone 8+ 78.1 158.4 7.5 iPhone 8 67.3 138.4 7.3 iPhone 6 67 138.1 6.9 iPhone 6+ 77.8 158.1 7.1 iPhone 5S 63.57 131.13 10.57 iPhone 5 58.6 123.8 7.6 iPod touch
(5th Gen.) 58.6 123 6.1 iPhone 4S 58.6 115.2 9.3 iPhone 4 58.6 115.2 9.3 iPhone x 70.9 143.6 7.7

As shown in Table 1, since the position of the wireless device only needs to be detected within the stroke zone in which the power transmission coil (for example, A3 coil) actually moves on the basis of the stroke zone (3 cm × 4 cm), the PDU is shown in FIG. Similarly, the PDU circuit may be implemented over a stroke zone (Type # 1) or an area (Type # 2) such as a PDUP dimension.

The results of this analysis indicate that the optimal charging can be achieved by tracking the position with the stroke zone and the PDU circuit of the smallest transmission coil, regardless of the position of the wireless device in the tray. .

According to various embodiments of the present invention, when charging a battery for a wearable device or a digital camera, a PDU circuit board 2 having the same size as a PDUP dimension covering a wider area should be implemented.

Therefore, in the present invention, when the autonomous charger dedicated to the wireless device is implemented as a hardware and a cost-effective autonomous wireless charging device, the optimal charging is possible by tracking the location of the wireless device with the smallest PDU circuit regardless of which location the wireless device is in the tray. Do it.

As shown in FIG. 9, a tray-type wireless charger pad having a two-dimensional dimension of e · f is used to detect and determine the center position of a smartphone receiver circuit in a stacked structure with a minimum air gap therebetween. A separate smartphone location detection coil can be installed.

FIG. 9 shows that when the smartphone is mounted on a pad of a tray type wireless charger, the trajectory range of the center of the faucet coil mounted on the smartphone drawn according to the size of the smartphone W × L and the faucet coil are located. It shows the surface trajectory range.

The two-dimensional dimension of the tray-type wireless charger pad according to the present invention is e · f (area A1).

When the smartphone is arbitrarily mounted in the tray-type wireless charger pad, the range of the center position trajectory of the faucet coil mounted in the smartphone is displayed to be inside the rectangle a · b (area A3).

When the total area of the faucet coil indicates the area of the surface trajectory that is touched on the pad, it becomes the inside of a rounded rectangle having a corner of a round curve (curve corresponding to one quarter of the coil outer circumference) (area A2 = c · d-(1 π / 4) × D ² ).

In the present invention, in order to quantify the trajectory range of the faucet coil, it is assumed that the two-dimensional dimension of the tray-type wireless charger pad is e · f = 10 cm × 18 cm, and the area A1 = 180 cm ² .

Here, suppose the iPhone 6S or iPhone 7 with the smallest dimension on the tray-type wireless charger pad until recently sold on the market, the smartphone W × L dimension is h _W × h _L = 6.71 cm x 13.83 cm.

Therefore, when iPhone 6S and iPhone 7 equipped with a case with a built-in faucet coil are randomly mounted on a tray pad, the areas A2 and A3 are respectively c · d-(1-π / 4) × D ² = 46.9 cm ² , When a · b = 13.718 cm ² , the detection circuit board of the present invention has the following circuit construction area ratios as compared with the detection circuits of the prior art (where D = 33 mm, a, b, c, d is expressed as a = c-D, b = d-D, c = e-2w, d = f · 2l, where W = (h _W -D) / 2, L = (h _L -D) / 2).

The detection circuit having the area A2 is implemented as a detection circuit occupying 26.1% of the area ((A2 / A1) × 100%) compared to the detection circuit having the area A1, and the detection circuit is located at the center of the tray.

The detection circuit having the area A3 is implemented as a detection circuit occupying 7.62% of the area ((A3 / A1) × 100%) compared to the detection circuit having the area A1, and the detection circuit is located at the center of the tray.

In other words, the detection circuit of the prior art having the area A1 is implemented with a circuit board size of 3.84 times (about 4 times) and about 13 times that of the detection circuit of the present invention having areas A2 and A3 (A1 / A2). = 3.84, A1 / A3 = 13.1).

For this reason, the detection circuit of the prior art slows the X-Y tracking scan rate about the center of the faucet coil proportionally, and the circuit cost is proportionally high.

Therefore, the smartphone position detection circuit of the tray-type wireless charger described in the present invention is approximate in accordance with the method in terms of the center position discrimination speed of the smart phone receiver circuit and the manufacturing cost of the detection circuit than the detection circuit of the basic prior art. It is a circuit that can achieve at least about 4 to 13 times efficiency.

According to an embodiment of the present invention as shown in Figure 5, the moving device for moving the coil is in the center portion cross-coupled in the state that the X-axis rail 21 and Y-axis rail 22 is crossed in the X-axis, Y-axis The second slide bearing 42, the X-axis rack gear 311, the X-axis motor 31, the Y-axis motor 32, the first slide bearing 41, and is interlocked with the movement control device.

The movement control device is also interlocked with the PDU circuit board 2 or PDUP (C).

As the power transmission coil 1 moves to a predetermined position, the Y-axis rail 22 coupled to the second slide bearing 42 may move the X-axis rail 21 according to the operation of the X-axis motor 31. After moving along, the slider coupled to the Y-axis rail 22 in accordance with the drive of the Y-axis motor 32 moves in the direction of the Y-axis rail 22 to reach the optimal position of wireless charging.

Specifically, the X-axis rail 21 is a device that is fixed across from one end to the other end of the lower cover (2). As a result, the Y-axis rail 22 fixed to the X-axis rail 21 can quickly move the center coil to a specific position.

The Y-axis rail 22 formed perpendicular to the X-axis rail 21 moves the central coil fixedly coupled to the slider in the X-axis and Y-axis directions to reach an optimal position for wireless charging.

The Y-axis rail 22 is surrounded by a first through hole formed so that the X-axis motor 31 is wrapped therein and a Y-axis motor 32 formed perpendicularly to the X-axis motor 31. The rail is formed so that the second through hole to be invisible.

Here, the X-axis motor 31 and the Y-axis motor 32 may be coupled to the coupling hole formed in the Y-axis rail 22, the X-axis motor 31 and the Y-axis motor 32 is the side As seen from the above, the area exposed to the upper part and the area exposed to the lower part of the coupling hole are the same, and the area exposed to the upper part of the coupling hole is a space between the slider and the Y axis rail 22 and the slider moves in the Y axis. The area exposed to the lower part of the coupling hole is a space between the Y-axis rail 22 and the X-axis rail 21 and does not prevent the Y-axis rail 22 from moving along the X-axis. It is installed as possible.

Therefore, the present invention can achieve blind spot removal and stable running (smooth movement, noise reduction) with a specialized structure in which a driving unit (drive motor, rack and pinion) is disposed between the guide rail and the slider.

As shown in FIG. 5, the X-axis rail gear 311 is attached to and fixed to the X-axis rail 21 according to the present invention, and engaged with the X-axis pinion gear 313 of the X-axis motor 31. After placement, second slide bearings 42 are positioned on both sides of the X-axis rail 21.

The X-axis motor 31 and the Y-axis motor 32 are inserted into the through holes connecting the Y-axis rail 22 and the X-axis rail 21 that hold the position of the X-axis motor 31.

The Y-axis motor 32 is inserted into the through hole 320 and fixed to the coupling hole formed on the Y-axis rail 22.

The lower ends of the first slide bearings 41 having an E shape are coupled to both end portions of the Y-axis rails 22.

At this time, both sides of the Y-axis rail 22 are bent stepwise so that the bent portion is inserted into the lower end of the first slide bearing 41.

The Y-axis pinion gear 323 is engaged with the Y-axis rack gear 321 of the Y-axis motor 32 to rotate.

A slider is coupled to an upper shape of the “E” shape to allow the slider to move to an arbitrary position along the X axis.

The assembled X-axis rail 21 and Y-axis rail 22 are inserted into the lower cover, and only the X-axis rail 21 is fixed to the inner side of the lower cover.

Therefore, the X-axis rail 21 is not movable, but the Y-axis rail 22 on the upper side of the X-axis rail 21 can move in the X-axis direction, the slider after moving in any X-axis direction It can move in any Y-axis direction.

Figure 7 shows that when charging the smartphone in a tray surrounded by a thin border around in accordance with an embodiment of the present invention to increase the charging efficiency by moving the coil only in the stroke zone of the center of the tray (horizontal storage console) When charging a smartphone in a car console box with a gap to be inserted in the vertical direction, the coil moves only within the stroke zone to increase the charging efficiency (pocket console), and the car has a slanted plate formed in a diagonal direction. When charging the smartphone in the console box, the coil is moved only within the stroke zone to increase charging efficiency (tilt stand console).

As shown in FIG. 8, the present invention shows the presence range of the power receiving coil according to the position of the smartphone on the charging pad in the tray-like case.

When the smartphone is placed at an angle, the outline of the faucet coil is pushed in, and the range of the faucet coil shows that the inside of the square is a rounded corner.

As shown in FIG. 10, the power receiving coil 1-1 corresponding to the power transmitting coil 1 is moved by the moving device 150 to a position sensed by the PDU circuit board 2. Is controlled by the MCU 100, the ring counter & switch 104, 105 detects the position of the wireless device in the PDU circuit board 2 through the level detector 103 in units of time, and then the MCU 100 Moves the power transmission coil 1 to the moving device 150 and supplies power to the power transmission coil 1 through the carrier amplifier 101, the digital ammeter 102, and the like.

Whether or not the position of the wireless device is changed by the digital current meter to instantly recognize the sudden change in the current by any time there is a method of reactivating the PDU circuit board (2) to track the center position of the power receiver coil by determining whether or not the position of the wireless device.

Next, as shown in FIG. 11, the transmitter transmits the reported Received Power value of the receiver, which is reported by the power transmitter (charger) every two seconds when the foreign substance detection function is operated at all times. In case of exceeding a certain threshold by estimating the loss power value subtracted from the output power, it is judged that the central axis between the two coils is large, and immediately commands the control board (e.g. MCU) of the mobile device to receive the power coil. Coupling the center position.

In one embodiment P _Loss = _PT P - P _PR if _la, where P _PT = P _In ― P _PTLoss , P _PR = P _Out + _Calculate the power loss value (P _Loss ) using P _PRLoss to determine the position change of the wireless device after comparison with the threshold value, and if the position change is confirmed, turn on the PDU circuit board (2) and then center the receiving coil Keep track of your location.

10 uses a detection coil circuit board using an induction coil having good detection sensitivity and high position resolution. On the X and Y axes, a ring counter and a switch are used to detect the approximate position, and a simple current meter is used to precisely track the center position of the faucet coil so that the mobile device equipped with the transmission coil moves to the faucet coil.

According to an embodiment of the present invention, it is possible to form a stroke zone of a power transmission coil buried underground in a charging station of an electric vehicle.

Alternatively, according to an embodiment of the present invention, after a plurality of electric vehicles parked side by side on the parking line, the transmission coil embedded in the basement strokes along the X-axis rail 21 and the Y-axis rail 22 of the present invention. Moving within the zone allows the power transmission coil and power receiving coil R to be coaxial to provide the advantages of increased hardware and cost efficiency of the charging station, such as reduced hardware costs and reduced power.

Therefore, the present invention can be used in a variety of devices or devices or vehicles using wireless charging as well as in the form of a tray-type case defining a mounting position of the wireless device.

1: power transmission coil
1-1: Faucet coil
2: PDU circuit board
3: PDUP
21: X axis rail
22: Y axis rail
31: X axis motor
32: Y axis motor
41: first slide bearing
42: second slide bearing
100: MCU
101: carrier amplifier
102: digital ammeter
103: level detector
104, 105: Ring Counters & Switches
150: moving device
311: X axis rack gear
313: X axis pinion gear
320: through hole
321: Y-axis rack gear
323: Y-axis pinion gear

Claims (5)

In the hardware and cost-effective autonomous wireless charging device employing a tray-type case, including a mobile unit for moving the power transmission coil to the position sensed by the PDU circuit board,
Hardware and cost-effective autonomous wireless charging device, characterized in that for moving the transmission coil only in the stroke dimension located in the center portion of the autonomous wireless charging device that can move in the vertical direction. The method of claim 1,
The autonomous wireless charging device further includes a PDU circuit board for detecting a location of the wireless device therein, wherein the transmission coil moves in correspondence with the PDU circuit board only within the stroke dimension to charge the wireless device. This high autonomous wireless charging device. The method of claim 2,
By installing a PDU / PDUP combo circuit board combined with a PDUP (Position Detection Unit Plate) formed by extending only a board without an electrical circuit to the PCB of the PDU circuit board, it is possible to track the center position of the power receiver coil of the wireless device. Hardware and cost-effective autonomous wireless charging device. The method of claim 1,
The mobile device,
Hardware and cost-effective autonomous wireless charging device, characterized in that to use the XY guide using a slide bearing method is disposed between the guide rail and the slider. The method of claim 1,
In the process of finding the location of the wireless charging device, when the location of the wireless device is changed by external vibration or shock, the digital current meter is used to recognize the moment when a sudden current change occurs. To track the center of the,
Hardware and cost-effectiveness, which is a process of autonomous charging by a wireless device by moving the power transmission coil within a certain time through the monitoring of power loss value by using the power loss method used to detect foreign substances within a predetermined time. This high autonomous wireless charging device.

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