KR101671925B1 - Magnetic Resonant wireless charging apparatus having tilt alignment function - Google Patents

Magnetic Resonant wireless charging apparatus having tilt alignment function Download PDF

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Publication number
KR101671925B1
KR101671925B1 KR1020150092191A KR20150092191A KR101671925B1 KR 101671925 B1 KR101671925 B1 KR 101671925B1 KR 1020150092191 A KR1020150092191 A KR 1020150092191A KR 20150092191 A KR20150092191 A KR 20150092191A KR 101671925 B1 KR101671925 B1 KR 101671925B1
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South Korea
Prior art keywords
self
mobile terminal
resonant
resonant wireless
wireless charging
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KR1020150092191A
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Korean (ko)
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정영현
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주식회사 엠씨넥스
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    • H02J7/025—
    • H02J17/00—

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-resonant wireless charging device having a tilt adjusting function, and more particularly, to a self-resonant wireless charging device having a resonator of a self- The problem of lowering the charging efficiency due to the resonator mismatching of the self-resonant wireless power receiving circuit implemented in the mobile terminal can be solved.

Description

[0001] The present invention relates to a magnetic resonance wireless charging apparatus having a tilt adjustment function,

The present invention relates to a wireless charging technique, and more particularly, to a self-resonant wireless charging device having a tilt adjusting function.

The self-resonant wireless power transmission technology is a technology for transmitting power wirelessly using a strong magnetic coupling phenomenon formed between self-resonant coils having the same resonance frequency. And the like. Korean Patent No. 10-1374525 (Apr. 201, 03, 05) proposes a self-resonating wireless charging technique.

When the self-resonant wireless charging device is installed in the vehicle, the position of the mobile terminal placed on the self-resonant wireless charging device continuously changes in the environment where the vehicle is moving. Accordingly, the resonator of the self-resonant wireless power transmission circuit implemented in the self-resonant wireless charging device and the resonator of the self-resonant wireless power reception circuit implemented in the mobile terminal coupled thereto are mismatched to lower the charging efficiency.

Therefore, the present inventors have found that the resonator of the self-resonant wireless power transmission circuit implemented in the self-resonant wireless charging device in a situation where the position of the mobile terminal such as the environment in which the vehicle is moving and the self- We have researched the technology that can solve the problem of charging efficiency degradation due to resonator mismatch of the receiving circuit.

Korean Patent No. 10-1374525 (2014. 03. 05)

The present invention has been made under the above-mentioned circumstances, and it is an object of the present invention to provide a resonator of a self-resonant radio power transmission circuit implemented in a self- And it is an object of the present invention to provide a self-resonant wireless charging device having a tilt adjusting function capable of solving the problem of charging efficiency reduction due to resonator mismatching of a circuit.

According to an aspect of the present invention, a self-resonant wireless charging apparatus having a tilt adjusting function includes a lower base body; An upper support coupled to rotate on the lower base body in a direction perpendicular to the ground; A lower portion supported by the upper support, and a self-resonant wireless power transmission circuit for wireless charging the mobile terminal and determining the mobile terminal position matching is implemented therein; Rotation driving means for rotating the upper support body in a direction perpendicular to the ground to tilt the main body to the mobile terminal position when it is determined that the mobile terminal posture is mismatched by the self-resonant radio power transmission circuit; A case surrounding the lower base body, the upper support body, the main body and the rotation driving means; And the like.

According to a further aspect of the present invention, the self-resonant radio power transmission circuit comprises: a power supply for supplying AC power; A controller for performing power supply control; A power amplifier for amplifying the supplied AC power; A matching circuit for impedance matching an amplified AC power source to minimize power loss; A resonator for transmitting radio power in a self-resonant manner; Wherein the controller determines the position of the mobile terminal based on the amount of current change in the matching circuit due to the amount of change in impedance due to the self resonance of the resonator.

According to a further aspect of the present invention, when the current change amount of the matching circuit is kept constant within the reference current range, the controller determines that the mobile terminal posture is matched correctly.

According to a further aspect of the present invention, when the current variation amount of the matching circuit exceeds the reference current range, the controller determines that the mobile terminal posture is mismatching incorrectly.

According to a further aspect of the present invention, there is provided an attitude matching display unit including a plurality of LEDs that are differently lit according to the degree of mobile terminal attitude matching determined by the control unit; .

The present invention relates to a resonator of a self-resonant wireless power transmission circuit implemented in a self-resonant wireless charging device in a situation where a mobile terminal attitude such as an environment in which a vehicle is moving and a self- The charging efficiency of the self-resonant wireless charging device can be improved, so that it is possible to stably charge the mobile terminal battery.

1 is a cross-sectional view showing the configuration of an embodiment of a self-resonant wireless charging apparatus having a tilt adjusting function according to the present invention.
2 is a cross-sectional view illustrating a posture adjusting operation of a self-resonant wireless charging apparatus having a tilt adjusting function according to the present invention.
3 is a block diagram showing an embodiment of a self-resonant radio power transmission circuit and a self-resonant radio power reception circuit.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the like elements throughout.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The terms used throughout the specification of the present invention have been defined in consideration of the functions of the embodiments of the present invention and can be sufficiently modified according to the intentions and customs of the user or operator. It should be based on the contents of.

1 is a cross-sectional view showing the configuration of an embodiment of a self-resonant wireless charging apparatus having a tilt adjusting function according to the present invention. 1, a self-resonant wireless charging apparatus 100 having a tilt adjusting function according to this embodiment includes a lower base 110, an upper support 120, a main body 130, A driving means 140, and a case 150. [

The lower base body 110 is coupled to an upper support body 120 which is supported on a bottom surface of a position where the self-resonant wireless charging apparatus 100 is installed, and the upper portion is rotatably driven in a direction perpendicular to the paper surface.

The upper and lower supports 110 and 120 are coupled to each other so as to be rotatably driven in a direction perpendicular to the paper surface. So as to support the main body 130.

A lower portion of the main body 130 is supported by the upper support 120, and a self-resonant wireless power transmission circuit 131 for wireless charging of a mobile terminal and determining a mobile terminal attitude matching is implemented therein, 120).

When it is determined that the mobile terminal posture is mismatched by the self-resonant wireless power transmission circuit 131, the rotation driving means 140 rotates the upper support 120 in a direction perpendicular to the paper surface, The main body 130 is tilted.

For example, as shown in FIG. 1, when the rotation driving means 140 is implemented by the ball 141 and the cup 142, the movement of the cup 142 surrounding the ball 141 causes the upper support 120 And may be rotationally driven in a direction perpendicular to the paper.

At this time, though not shown in the drawing, the rotation driving of the cup 142 surrounding the ball 141 is performed stepwise according to the degree of matching of the mobile terminal attitude determined by the self-resonant wireless power transmission circuit 131 using a step motor And so on. Meanwhile, the shape of the rotation driving means 140 can be realized in various forms that can be rotationally driven in addition to the shapes shown in the drawings.

The case 150 surrounds the lower base 110, the upper support 120, the main body 130, and the rotation driving means 140. The mobile terminal 200 is placed on the case 150 and the main body 130 is tilted toward the mobile terminal 200 as shown in FIG. 2 is a cross-sectional view illustrating a posture adjusting operation of a self-resonant wireless charging apparatus having a tilt adjusting function according to the present invention.

3 is a block diagram illustrating an embodiment of a self-resonant wireless power transmission circuit and a self-resonant wireless power reception circuit. The self resonant wireless power transmission circuit 131 is implemented in the main body 130 of the self resonant wireless charging device 100 and the self resonant wireless power receiving circuit 210 is implemented in the mobile terminal 200.

The self-resonant wireless power transmission circuit 131 includes a power supply unit 1311 for supplying AC power, a control unit 1312 for performing power supply control, a power amplifier 1313 for amplifying the supplied AC power, A matching circuit 1314 that impedance-matches the amplified AC power source to minimize the loss, and a resonator 1315 that is a resonant coil that transmits radio power in a self-resonant manner.

The self-resonant wireless power receiving circuit 210 includes a resonator 211 that is a resonant coil that receives radio power in a self-resonant manner, a regulator 212 that stabilizes the received radio power to a constant DC voltage, A DC / DC converter 213 for converting the DC voltage into a mobile terminal charging rated DC voltage, and a controller 214 for performing mobile terminal battery charging control.

Resonance of the self-resonant wireless power transmission circuit 131 implemented in the main body 130 of the self-resonant wireless charging device 100 in a situation where the attitude of the mobile terminal 200 changes such as the environment in which the vehicle is moving, Resonance mismatching of the self-resonant wireless power receiving circuit 210 implemented in the coupled mobile terminal 200 causes a charging efficiency lowering problem.

If the resonator of the self-resonant radio power transmitting circuit 131 and the resonator of the self-resonant radio power receiving circuit 210 are not matched correctly, a large amount of leakage electromagnetic waves with high output are generated within the magnetic field range, The current changes due to the amount of change in impedance caused by the impedance.

The present invention can be applied to a case in which the main body 130 is tilted to the position of the mobile terminal 200 placed on the case 150 through the rotational driving of the upper support body 120 which is rotationally driven on the lower base body 110, Resonating wireless power transmission circuit 131 implemented in the main body 130 and the position of the self-resonant wireless power receiving circuit 210 implemented in the mobile terminal 200 coupled thereto, The charging efficiency of the charging apparatus 100 is improved.

For this, the controller 1312 may be configured to determine the position of the mobile terminal according to the amount of current change in the matching circuit 1314, which is caused by an impedance change amount due to the self resonance of the resonator 1315.

For example, when the controller 1312 maintains the current variation of the matching circuit 1314 constant within the reference current range, the controller 1312 may determine that the mobile terminal posture is correctly matched. At this time, the reference current range may be varied according to the size of the AC power supplied by the power supply unit 1311. [

On the other hand, when the controller 1312 determines that the current change amount of the matching circuit 1314 exceeds the reference current range, the controller 1312 determines that the mobile terminal posture is incorrectly mismatched. At this time, it can be determined that the greater the degree that the reference current range is exceeded, the worse the mobile terminal attitude matching is.

The control unit 1312 drives the rotation driving means 140 to rotate the upper support 120 in the vertical direction with respect to the paper surface so that the mobile terminal The main body 130 is tilted to the position of the main body 200.

When the main body 130 is tilted to the position of the mobile terminal 200 placed in the case 140, the resonator of the self resonant wireless power receiving circuit 210 and the self resonant wireless power The matching position of the receiving circuit 210 is adjusted.

Then, by matching position of the resonator of the self-resonant wireless power receiving circuit 210 and the self-resonant wireless power receiving circuit 210 implemented in the mobile terminal 200 coupled to the resonant wireless power receiving circuit 210, The amount of current change is kept constant within the reference current range, and impedance matching of the matching circuit 1314 is achieved.

Thus, in a situation where the mobile terminal attitude changes, such as the environment in which the vehicle is moving, the resonator of the self-resonant wireless power transmission circuit implemented in the self-resonant wireless charging device and the self- The charging efficiency of the self-resonant wireless charging device can be improved.

According to a further aspect of the present invention, the case 150 may include an attitude-matched display unit 151. The posture matching display unit 151 includes a plurality of LEDs that are lighted differently according to the mobile terminal posture matching degree determined by the controller 1312. [

For example, when the attitude of the mobile terminal is correctly matched, all the LEDs of the attitude matching display unit 151 are turned on, and the number of LED lights is decreased as the attitude of the mobile terminal attitude is bad. To confirm whether or not the mobile terminal posture is correctly matched.

The present invention can be applied to a resonator of a self-resonant wireless power transmission circuit implemented in a self-resonant wireless charging device in a situation where a mobile terminal attitude such as an environment in which a vehicle is moving, It is possible to solve the charging efficiency problem due to the resonator mismatching of the resonant wireless power receiving circuit and to improve the charging efficiency of the self resonant wireless charging device so that it is possible to stably charge the mobile terminal battery.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. .

The present invention is industrially applicable in the field of wireless charging technology and its application technology.

100: Self resonance wireless charging device
110: Lower base body
120: upper support
130:
131: Self Resonant Radio Power Transmission Circuit
140: rotation driving means
150: Case
200: mobile terminal
210: Self Resonant Wireless Power Receiving Circuit

Claims (5)

A lower support body supported by the upper support body, and a lower magnetic body for wireless charging of the mobile terminal and for determining the position of the mobile terminal, A main body in which a resonance wireless power transmission circuit is implemented; and a control unit that, when it is determined that the mobile terminal posture is mismatched by the self-resonant wireless power transmission circuit, rotates the upper support body in a direction perpendicular to the paper surface, A self-resonant wireless charging device having a tilting adjustment function including a rotation drive means for tilting, a case for surrounding the lower base body, an upper support body, and a body and a rotation drive means,
The self-resonant radio power transmission circuit comprising:
A power supply unit for supplying AC power;
A controller for performing power supply control;
A power amplifier for amplifying the supplied AC power;
A matching circuit for impedance matching an amplified AC power source to minimize power loss;
A resonator for transmitting radio power in a self-resonant manner;
Including,
Wherein the control unit comprises:
Wherein the attitude of the mobile terminal is determined based on the amount of current change in the matching circuit due to the amount of change in impedance due to the self resonance of the resonator. delete The method according to claim 1,
Wherein the control unit comprises:
Wherein when the current change amount of the matching circuit is kept constant within the reference current range, it is determined that the mobile terminal posture is matched correctly. The method according to claim 1,
Wherein the control unit comprises:
Wherein when the current change amount of the matching circuit exceeds the reference current range, it is determined that the mobile terminal posture is mismatched incorrectly. The method according to claim 1,
Said case comprising:
A posture matching display unit having a plurality of LEDs that are differentially illuminated according to the mobile terminal posture matching degree determined by the control unit;
And a tilt adjusting function for adjusting the tilt of the antenna.
KR1020150092191A 2015-06-29 2015-06-29 Magnetic Resonant wireless charging apparatus having tilt alignment function KR101671925B1 (en)

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KR1020150092191A KR101671925B1 (en) 2015-06-29 2015-06-29 Magnetic Resonant wireless charging apparatus having tilt alignment function

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110034773A (en) * 2009-09-29 2011-04-06 삼성전자주식회사 Wireless charger using a way of inductive coupling
KR20140029895A (en) * 2012-08-31 2014-03-11 엘지전자 주식회사 Wireless charging device and mobile terminal
KR101374525B1 (en) 2013-08-22 2014-03-18 주식회사 맥스웨이브 System for wireless charging control based magnetic resonance type

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20110034773A (en) * 2009-09-29 2011-04-06 삼성전자주식회사 Wireless charger using a way of inductive coupling
KR20140029895A (en) * 2012-08-31 2014-03-11 엘지전자 주식회사 Wireless charging device and mobile terminal
KR101374525B1 (en) 2013-08-22 2014-03-18 주식회사 맥스웨이브 System for wireless charging control based magnetic resonance type

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