KR102465019B1 - Wireless power receiving apparatus and rotating apparatus having the same - Google Patents

Abstract

An embodiment of the present invention provides a wireless power receiver with a simple structure, a compact size, and improved waterproof structure to be used in a wet environment as a power receiving resonant coil and a rectifier are integrally provided, and a rotating device including the same In accordance with one aspect of the present invention, there is provided a wireless power receiver comprising: a resonance coil for receiving a high-frequency power signal wirelessly transmitted from a power transmission facility by frequency resonance; a load coil corresponding to the resonance coil to receive a high-frequency power signal; a rectifier connected to the load coil to rectify and supply a high-frequency power signal; and a case in which the resonance coil, the load coil, and the rectifier are integrally held therein, modularized, and sealed from the outside.

Description

Wireless power receiver and rotating device including the same

The present invention relates to a wireless power receiver for transmitting power supplied wirelessly and a rotating device including the same.

A general wireless power receiver is a device for wirelessly receiving power from an external power transmission facility, and the power transmission facility may include a power transmission coil for wirelessly transmitting power.

In addition, the wireless power receiver includes a power receiving resonator for receiving power transmitted from the power transmission facility. The power receiving resonator is composed of a resonant coil and a rod coil, and is provided in one power receiving resonator case.

The power receiving resonator case is divided into a first case and a second case, and the resonant coil and the rod coil are installed inside and are combined to be waterproof.

At this time, the resonance coil is not connected to the load coil, and the load coil is connected to an external rectifier through an SMA (Sub-miniature TYPE A) connector or cable.

The rectifier is separated from the power receiving resonator and provided in a separate case for waterproofing, and rectifies the high-frequency power signal transmitted from the load coil into DC current.

On the other hand, in the wireless power transmitter having such a structure, the SMA connector or cable terminal for transmission of power or high-frequency power signal is exposed to the outside, which may cause power loss, and the structure is complicated, and thus installation and management are inconvenient. Also, there is a difficulty in waterproofing each case or between the SMA connector or cable terminal and each case.

Domestic Patent Application No. 2010-0095456 (2010.09.30) Domestic Patent Application No. 2013-0056003 (2013.05.16)

An embodiment of the present invention provides a wireless power receiver with a simple structure, a compact size, and improved waterproof structure to be used in a wet environment as a power receiving resonant coil and a rectifier are integrally provided, and a rotating device including the same aims to provide

A wireless power receiver according to an aspect of the present invention includes a resonance coil for receiving a high-frequency power signal wirelessly transmitted from a power transmission facility by frequency resonance; a load coil corresponding to the resonance coil to receive a high-frequency power signal; a rectifier connected to the load coil to rectify and supply a high-frequency power signal; and a case in which the resonance coil, the load coil, and the rectifier are integrally held therein, modularized, and sealed from the outside.

In addition, the case may be divided into a first case and a second case, and may include a sealing material provided between the first case and the second case.

In addition, in the case, one of the first case and the second case has an outer diameter larger than the other, a first spiral portion is formed on the outer circumferential surface, and a sealing material is interposed between the first case and the second case In the closed state, the other one of the first case and the second case is pressed from the outside of the other one of the first case and the second case, and the first spiral part of the one of the first case and the second case is pressed. It may include a coupling cover having a second spiral portion to be spirally coupled.

In addition, the case includes a first flange extending outwardly from the first case, and a second flange extending from the second case to correspond to the first flange, and the first flange and the second flange. In a state in which the sealing material is interposed therein, the outer sides of the first flange and the second flange may be coupled by a fastening member.

In addition, the sealing material may include an O-ring.

In addition, the rotating device according to another aspect of the present invention is a rotating body provided with an electronic device; and the aforementioned wireless power receiver coupled to one side of the rotating body to supply power to the electronic device.

In addition, it may further include at least one voltage stabilization unit provided on one side of the rotating body to stabilize the DC output voltage rectified by the rectifier of the wireless power receiver to a voltage level required by the load.

In addition, a plurality of the wireless power receiver may be provided and connected in series via a wire, and two output lines from the rectifier of the wireless power receiver may be connected to an input line of the voltage stabilization unit.

In addition, it is provided on one side of the rotating body and includes N (N: a natural number of 2 or more) coupling protrusions to which the wireless power receiver is coupled, wherein the wireless power receiver is provided in the central part of the case and the coupling protrusions It may include a coupling groove to which is coupled.

In addition, the coupling protrusions may be arranged at equal intervals along the circumferential direction of the rotating body.

In addition, a third spiral portion may be formed on an outer peripheral surface of the coupling protrusion, and a fourth spiral portion that is spirally coupled to the third spiral portion may be formed in the coupling groove.

In addition, it may further include a fixing member fastened to one side of the coupling groove of the case in a direction perpendicular to the axis of the coupling projection is pressed.

In addition, the coupling groove of the case may further include a through fixing member fastened through the coupling protrusion in a direction orthogonal to the axis of the coupling protrusion.

In addition, the coupling protrusion may be fitted and coupled to the coupling groove, and the case may further include a coupling member that passes through the coupling recess and is fastened to an end of the coupling protrusion.

In addition, the coupling protrusion is installed through the coupling groove of the case, a third spiral part is formed on the outer peripheral surface, and the coupling protrusion has a first fixing member and a first fixing member provided with a fifth spiral part to press and fix both ends of the case. 2 The fixing member can be screwed into place.

In addition, it may further include a pin member inserted in a direction orthogonal to the axis of the coupling projection to prevent loosening of the first fixing member or the second fixing member on one side of the coupling protrusion.

In addition, the electronic device may include a sensor for detecting the rotational state of the rotating body.

According to an embodiment of the present invention, the resonance coil, the load coil, and the rectifier are integrally modularized so that the structure is simple, the terminals exposed to the outside are minimized, and the case can be waterproofed, so that it can be used in a wet environment. .

1 is a block diagram illustrating a circuit of a wireless power transmitter according to an embodiment of the present invention.
2 is a front view of a rotating electric device to which a wireless power transmitter according to an embodiment of the present invention is applied.
3 is a cross-sectional view of a wireless power receiver according to an embodiment of the present invention.
4 is a cross-sectional view of a wireless power receiver separated from a rotating body according to an embodiment of the present invention;
5 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.
6 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.
7 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.
8 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.
9 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.
10 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings. Embodiments of the present invention may be modified in various other forms, and the scope of the present invention is not limited only to the embodiments described below. The shapes and sizes of elements in the drawings may be exaggerated for clearer description, and elements indicated by the same reference numerals in the drawings are the same elements.

1 is a block diagram illustrating a circuit of a wireless power transmitter according to an embodiment of the present invention, and FIG. 2 is a front view of a rotating electric device to which a wireless power transmitter according to an embodiment of the present invention is applied.

Referring to FIGS. 1 and 2 , the rotating device 10 of this embodiment is continuously rotated and may include a rotating body 12 provided with electronic devices such as sensors.

The rotating device 10 may be provided with a wireless power receiver 100 to continuously supply power to an electronic device as the rotating body 12 continuously rotates.

The wireless power receiver 100 may receive power wirelessly transmitted from the power transmission facility 1 provided outside.

For example, in the rotating device 10, the rotating body 12 may be a spindle that transmits a rotational driving force of a motor to a rolling roll in a hot rolling facility, and as an electronic device, the rotating speed of the rotating body 12 such as a spindle Alternatively, it may include a strain gauge or a torque sensor for sensing temperature, torque, or the like.

Preferably, the wireless power receiver 100 may be provided in plurality to stabilize and output the rectified DC output voltage to a voltage level required by the electronic device and may be connected in series, and at least one in order to stably maintain the voltage. may include a voltage stabilization unit 30 of

Here, the voltage stabilization unit 30 may be installed on one side of the rotating body 12 , and may be connected in series with each wireless power receiver 100 via an electric wire.

In addition, the two output lines (+, -) from the rectifier of the wireless power receiver 100 may be connected to the input lines (+, -) of the voltage stabilization unit 30 .

In this embodiment, the voltage stabilization unit 30 is described as being installed on one side of the rotating body 12 , but it is also possible to be provided integrally with the wireless power receiver 100 .

Also, in the present embodiment, the wireless power receiver 100 may be connected in series, and when the reception capability of the wireless power receiver 100 is low, the number of power receivers 100 may be increased in series. For example, the number of the wireless power receiver 100 may be installed in series by narrowing the interval between them, such as four or five.

In addition, the rotating body 12 may include N (N: a natural number of 2 or more) coupling protrusions 14 for coupling the wireless power receiver 100 . At this time, the coupling protrusions 14 may be provided at equal intervals so that the wireless power receiver 100 can maintain a rotational balance in the process of being coupled and rotating.

As an example, in this embodiment, there may be three wireless power receiver 100 , and it is described as being coupled to three coupling protrusions 14 installed along the circumferential direction of the rotating body 12 , but the wireless power receiver (100) and the number or installation position of the engaging projection 14 is not limited.

In addition, in each wireless power receiver 100, two output lines (+, -) coming out of each rectifier can be connected in series to the input lines (+, -) of the voltage stabilization unit 30 via a wire. and such a connection structure is called a tage chain structure.

On the other hand, even when the wireless power receiver 100 and the N coupling protrusions 14 are provided, they can be connected in the same structure. That is, the (+) polarity emitted from the wireless power receiver 100 may be connected to the (-) polarity of another adjacent wireless power receiver 100 . In addition, the (-) polarity emitted from the wireless power receiver 100 may be connected to the (+) polarity of another adjacent wireless power receiver 100 . In this way, the N wireless power receiver 100 are connected in series with each other, and finally the voltage stabilization unit 30 and the (+) polarity and (-) polarity of the adjacent wireless power receiver 100 are the voltage stabilization units. It can be connected to (+) polarity and (-) polarity of (30).

The voltage stabilization unit 30 may supply a necessary direct current (DC) voltage to an electronic device such as a sensor installed in the rotating body 12 .

On the other hand, the coupling structure of the wireless power receiver 100 and the coupling protrusion 14 can be understood in more detail through the configuration of the wireless power receiver 100 to be described later.

3 is a cross-sectional view of a wireless power receiver according to an embodiment of the present invention, and FIG. 4 is a cross-sectional view of the wireless power receiver according to an embodiment of the present invention separated from a rotating body.

Referring to FIGS. 3 and 4 , the wireless power receiver 100 of the present embodiment is a device that receives a high-frequency power signal wirelessly transmitted from the power transmission facility 1 , converts it into power, and supplies it.

Such a wireless power receiver 100 can be used to stably receive power without waterproofing or power distribution in a situation away from a continuously rotating device or power transmission facility 1, or in a wet environment submerged in water or oil. have.

The wireless power receiver 100 of this embodiment includes a power receiving resonator 110 that receives power transmitted from the power transmission facility 1 .

The power receiving resonator 110 may include a resonance coil 112 and a load coil 114 .

Specifically, the resonance coil 112 may receive a radio frequency power signal wirelessly transmitted from the power transmission facility 1 .

Here, the resonance coil 112 may receive a high-frequency power signal in an electromagnetic sensitive resonance method. The load coil 114 transmits the high-frequency power signal induced in the resonance coil 112 to the rectifier and is converted into voltage or current.

Also, the load coil 114 is connected to the rectifier 120 , and a high-frequency power signal is supplied from the load coil 114 to the rectifier 120 to be rectified into DC power (+, -).

Meanwhile, in the present embodiment, the resonance coil 112 , the load coil 114 , and the rectifier 120 may be integrally held inside the case 130 and modularized, and may be used in a wet environment by the case 130 . It can be sealed from the outside.

In this case, the resonance coil 112 may have an air gap 150 of a predetermined space, for example, several mm, formed therebetween with the adjacent case 130 , thereby minimizing the influence of external moisture.

In addition, the case 130 may be divided into a first case 132 and a second case 134 for installing the resonance coil 112 , the load coil 114 , and the rectifier 120 therein.

Accordingly, a sealing material 140 may be provided between the first case 132 and the second case 134 to seal between the first case 132 and the second case 134 .

The sealing material 140 may be provided as an O-ring, and in addition, it may be provided as a sealing member of various shapes and materials. In addition, a seating groove (not shown) for seating an O-ring may be formed in the case 130 .

For example, the first case 132 may be located at the lower portion, and the second case 134 may be located at the upper portion.

In this case, the outer diameter of the first case 132 positioned at the lower portion may be larger than the outer diameter of the second case 134 positioned at the upper portion, and the first spiral portion 132a may be formed on the outer circumferential surface.

In addition, a coupling cover 136 may be provided on the upper portion of the second case 134 .

The inner diameter of the coupling cover 136 is provided to correspond to the outer diameter of the first case 132 , and the second case 134 is pressed against the first case 132 in the process of being coupled to the first case 132 . can be combined.

To this end, a second spiral portion 136a that is spirally coupled to the first spiral portion 132a of the first case 132 may be formed on the inner circumferential surface of the coupling cover 136 .

The coupling cover 136 is inserted so as to cover the outer diameter of the first case 132 from the lower portion of the second case 134 , and the second spiral portion 136a is the first spiral portion ( 132a) may be pressed so that the second case 134 and the first case 132 are in close contact with each other in the process of being spirally coupled.

In addition, a sealing material 140 may be interposed between the first case 132 and the second case 134 , and accordingly, in the process in which the coupling cover 136 is coupled to the first case 132 , the first case ( The 132 and the second case 134 may be sealed through the sealing material 140 .

In addition, the wireless power receiver 100 of the present embodiment may be provided with a coupling structure to be installed on the rotating body 12 of the rotating device 10 .

For example, a coupling protrusion 14 for coupling the wireless power receiver 100 may be provided on one side of the rotating body 12 .

In addition, in the wireless power receiver 100 , a coupling groove 138 corresponding to the coupling protrusion 14 may be formed in the central portion of the case 130 .

In addition, the coupling protrusion 14 may have a third spiral portion 14a formed on its outer circumferential surface, and on the inner circumferential surface of the coupling protrusion 14 , when the coupling protrusion 14 is coupled, the third spiral portion 14a is helically coupled. A fourth spiral portion 138a may be formed.

In addition, in the case 130 , specifically the second case 134 , the fixing member 142 may be fastened to one side of the coupling groove 138 in a direction orthogonal to the axis of the coupling protrusion 14 , and the fixing member As the 142 is pressed against the coupling protrusion 14 , it is possible to prevent the coupling protrusion 14 from shaking or loosening while the coupling protrusion 14 is inserted into the coupling groove 138 .

Here, the fixing member 142 is a fastening member such as a bolt, and may be fixed by pressing the coupling protrusion 14 in the process of being coupled to the second case 134 .

Meanwhile, in this embodiment, one side of the load coil 114 is connected to and supported by the rectifier 120 , but there is a support structure (not shown) for stably supporting the load coil 114 to the case 130 . can be provided. For example, a support portion (not shown) may be formed in a portion where the rectifier 120 is not located in the first case 132 . In addition, in the present embodiment, it is disclosed that a space is formed between the first case 132 and the load coil 114 on the side where the rectifier 120 is not located, but on the side where the rectifier 120 is not located. A lower portion of the case 132 may be formed adjacent to the load coil 114 .

In addition, a support structure (not shown) for stably supporting the load coil 114 as well as the resonant coil 112 and the rectifier 120 may be provided in the case 130, and the resonant coil 112 by this support structure ) and the case 130 , specifically, the air gap 150 formed between the second case 134 may be maintained in a constant space.

In the wireless power receiver 100 configured as described above, the resonance coil 112 , the load coil 114 , and the rectifier 120 are modularized in the case 130 and are provided integrally to the rotating body 12 individually. can be easily attached and detached, thereby increasing the convenience of maintenance of the wireless power receiver 100 .

On the other hand, in the present embodiment, the case 130 is coupled to the coupling protrusion 14 of the rotating body 12 by being fitted into the coupling groove 138 , and the coupling protrusion 14 is a fixing member coupled to the case 130 ( 142), the coupling structure of the case 130 and the coupling protrusion 14 or the coupling structure of the coupling protrusion 14 and the coupling groove 138 is not limited by this embodiment, and various form can be transformed.

5 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.

Referring to FIG. 5 , a through fixing member 182 may be fastened to the coupling groove 138 of the case 130 , and the through fixing member 182 is coupled in a direction orthogonal to the axis of the coupling protrusion 14 . As it is fastened through the protrusion 14 , the coupling groove 138 of the case 130 may be fixed to the coupling protrusion 14 .

Here, the through fixing member 182 may be provided as a fastening member such as a long bolt 182a, and may be coupled to the coupling groove 138 by a nut 182b coupled to an end of the bolt 182a. .

In addition, the coupling protrusion 14 may be provided in the form of a rod, but the shape is not limited. That is, a third spiral portion may be formed on the outer circumferential surface of the coupling protrusion 14 , and a fourth spiral portion may be formed in the coupling groove 138 , and such a structure includes the third spiral portion and the coupling groove 138 of the coupling protrusion 14 . ) can be maintained in a coupled state by the fastening force and the penetrating fixing member 182 that the fourth helix is helically coupled.

As described above, in this embodiment, the coupling cover 136 is described as being spirally coupled to the first case 132 while pressing the upper portion of the second case 134 , but wireless power according to another embodiment of the present invention As shown in Fig. 6, which is a cross-sectional view of the receiving device, the case 230 may have a structure to which the coupling cover 236 is coupled.

The coupling cover 236 is located at the lower portion of the first case 232 and presses the lower portion of the first case 232 , and it is also possible to be spirally coupled to the second case 234 .

In this case, the outer diameter of the second case 234 may be provided to be larger than the outer diameter of the first case 232 , and the outer diameter of the second case 234 may be provided to correspond to the inner diameter of the coupling cover 236 .

In addition, a first spiral portion 234a may be formed on the outer diameter of the second case 234 , and the first spiral portion 234a formed on the inner circumferential surface of the coupling cover 236 while the coupling cover 236 holds the first case 232 . As the second spiral portion 236a is spirally coupled to the first spiral portion 234a of the second case 234 , the first case 232 and the second case 234 are sealed through the sealing material 140 . It is also possible

7 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention. Referring to FIG. 7 , the coupling protrusion 14 may be coupled to the coupling groove formed in the case 330 .

The case 330 may include a first case 332 and a second case 334 . In this case, the outer diameter of the first case 332 positioned at the lower portion may be formed to be larger than the outer diameter of the second case 334 positioned at the upper portion, and the first spiral portion 332a may be formed on the outer circumferential surface.

In addition, a coupling cover 336 may be provided on the upper portion of the second case 334 .

The inner diameter of the coupling cover 336 may be provided to correspond to the outer diameter of the first case 332 .

While the second spiral portion 336a of the coupling cover 336 is spirally coupled to the first spiral portion 332a of the first case 332, the second case 334 is pressed against the first case 332, can be combined.

Meanwhile, in this embodiment, the second case 334 and the coupling cover 336 are described as being provided separately, but for the convenience of parts management and assembly, the second case 334 and the coupling cover 336 are provided. It is also possible to be provided integrally.

In addition, a third spiral portion 14a may be formed on the outer circumferential surface of the coupling protrusion 14 , and a third spiral portion 14a and a fourth spiral portion 338a for spiral fastening may be formed on the inner circumferential surface of the coupling groove. can

In addition, the case 330 , specifically the second case 334 , is formed with a central protrusion protruding upward in the center thereof, and a coupling groove into which the end of the coupling protrusion 14 is inserted may be provided in the central protrusion.

A fastening member 342 passing through the first case 332 and the second case 334 from the top may be fastened to the coupling protrusion 14 inserted into the defective groove of the second case 334, and the fastening member is provided to be caught on the upper end of the first case 332 , so that the first case 332 can be brought into close contact with the second case 334 .

The fastening member 342 may be a fixing bolt, and for this, a groove 146 to which the fastening bolt, which is the fastening member 342, is fastened may be provided at an end of the coupling protrusion 14 .

Preferably, the bolt, which is the fastening member 342 , may be provided to rotate and engage in a direction opposite to the direction in which the coupling protrusion 14 is coupled to the coupling groove 138 .

In addition, as the fastening member 342 passes through the first case 332 and the second case 334 , in order to seal the inside, the first case 332 and the second case 334 adjacent to the fastening member 342 . ) may be formed to contact each other, and a sealing material 140, for example, an O-ring may be interposed therebetween to seal the inside.

In addition, a fixing member 344 coupled to the coupling protrusion 14 may be provided at the lower portion of the first case 332 , and as the fixing member 344 presses the lower portion of the first case 332 , it is stable bonding can be maintained.

Here, the fixing member 344 may be provided as a nut.

8 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.

Referring to FIG. 8 , the case 430 includes a first flange 432a extending from the first case 432 and a second flange extending from the second case 434 to correspond to the first flange 432a ( 434a).

In addition, the sealing material 140 may be interposed on the inside of the first flange 432a and the second flange 434a, and a plurality of fastening members 436 on the outside of the first flange 432a and the second flange (432a) and the second flange ( By being coupled through 434a), the first case 432 and the second case 434 may be coupled.

On the other hand, in this embodiment, the formed position of the first flange (432a) and the second flange (434a) is not limited, for example, the first flange (432a) and the second flange (434a) is the upper end of the case (430). It may be located in or located in the middle or lower end, and may be deformed into various forms for coupling the first case 432 and the second case 434 by the fastening member 436 .

9 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.

Referring to FIG. 9 , the case 530 may include a first case 532 and a second case 534 . In this case, the outer diameter of the first case 532 positioned at the lower portion may be formed to be larger than the outer diameter of the second case 534 positioned at the upper portion, and the first spiral portion 532a may be formed on the outer circumferential surface.

In addition, a coupling cover 536 may be provided on the upper portion of the second case 534 .

The inner diameter of the coupling cover 536 may be provided to correspond to the outer diameter of the first case 532 , and a second spiral portion 536a may be formed on the inner circumferential surface.

While the second spiral portion 536a of the coupling cover 536 is spirally coupled to the first spiral portion 532a of the first case 532, the second case 534 is pressed against the first case 532, can be combined.

On the other hand, the coupling protrusion 14 may be installed to pass through a through hole formed through the case 530 , that is, the first case 532 and the second case 534 . At this time, the third spiral portion 14a may be formed on the outer peripheral surface of the coupling protrusion 14 .

In addition, both ends of the case 530 may be fixed to the coupling protrusion 14 by a first fixing member 542 and a second fixing member 544 . To this end, the first fixing member 542 and the second fixing member 544 have fifth spiral portions 542a and 544a that are spirally fastened to the third spiral portion 14a of the coupling protrusion 14 on the inner circumferential surface, respectively. can be The first fixing member 542 and the second fixing member 544 may be provided as nuts.

The second fixing member 544 may be coupled to one side of the coupling protrusion 14, and the first fixing member 542 is coupled to the coupling protrusion 14 in a state in which the case 530 is inserted thereon, Accordingly, the case 530 may be fixed to the coupling protrusion 14 by the first fixing member 542 and the second fixing member 544 .

In addition, as the coupling protrusion 14 passes through the first case 532 and the second case 534 , the first case 532 and the second case 534 adjacent to the coupling protrusion 14 for sealing the inside ) may be formed to contact each other, and a sealing material 141, for example, an O-ring may be interposed therebetween to seal the inside.

Preferably, in the embodiment, a fourth spiral portion 538a may be formed in the through groove of the case 530 , and accordingly, as it is spirally engaged with the third spiral portion 14a of the coupling protrusion 14 , the first Since it is engaged with the fixing member 542 or the second fixing member 544, it is possible to more stably maintain the coupled state.

On the other hand, in one side of the coupling protrusion 14, the pin member 546 is inserted in the direction in which the axis of the coupling protrusion 14 is perpendicular to the first fixing member 542 or the second fixing member 544 to prevent loosening. can be For example, the pin member 546 may be a split pin, and the pin member 546 has one end formed larger than the pin insertion hole 14c formed in the coupling protrusion 14, and the other end of the pin insertion hole 14c. It is provided so as to be opened after being penetrated and inserted into the coupling protrusion 14 to prevent separation from the coupling protrusion 14 .

10 is a cross-sectional view of a wireless power receiver according to another embodiment of the present invention.

Referring to FIG. 10 , the case 630 may include a first case 632 and a second case 634 . At this time, the lower end of the first case 632 located at the lower portion may be formed in the same manner as the second case 634 located at the upper portion, and the outer surface portion 632a of the second case 634 is formed as it progresses toward the upper side. It may be formed by reducing the outer diameter to be accommodated inside.

The outer diameter of the first case 632 may be the same as the outer diameter of the lower end of the second case 634 , and the outer surface portion 632a of the first case 632 is the outer surface portion 634a of the second case 634 . ) may be formed to extend downward to surround.

Meanwhile, an O-ring 140 may be provided between the outer surface portion 634a of the second case 634 and the bottom surface of the first case 632 for internal sealing.

Preferably, an outer guide 635a may be formed on the bottom surface of the first case 632 to cover a portion of the inner side of the outer surface portion 634a of the second case 634 .

In this embodiment, the O-ring 140 is interposed between the outer surface portion 632a of the first case 632 and the outer guide 635a, and as the outer surface portion 634a of the second case 634 is inserted, the first case It is possible to seal between the bottom surface of the 632 and the upper end of the outer surface portion 634a of the second case 634 .

In addition, the case 630, specifically the second case 634, has a central protrusion 633 protruding upward in the center thereof, and the central protrusion 633 has a coupling groove into which the end of the coupling protrusion 14 is inserted. (636) may be provided.

The coupling protrusion 14 inserted into the defect groove 146 of the second case 634 can be fastened with the fastening member 642 passing through the first case 632 and the second case 634 from the top, The fastening member 642 is provided to be caught on the upper end of the first case 632 , so that the first case 632 can be closely attached to the second case 634 .

The fastening member 642 may be a fastening member 642 such as a fastening bolt, and for this, a groove 146 to which the fastening bolt which is the fastening member 642 is fastened may be provided at an end of the coupling protrusion 14 .

The outer portion 633a of the central protrusion 633 may protrude upward, and the center 632b of the first case 632 may be inserted between the outer portions 633a of the central protrusion 633 .

In addition, an O-ring 141 may be provided between the outer side 633a of the central protrusion 633 and the bottom surface of the first case 632 to seal the inside.

In addition, an inner guide 635b provided to surround the outer portion 633a of the central protrusion 633 to prevent separation of the O-ring 141 may be formed on the bottom surface of the first case 632 .

In addition, a fixing member 644 coupled to the coupling protrusion 14 may be provided at the lower portion of the first case 632 , and as the fixing member 644 presses the lower portion of the first case 632 , it is stable bonding can be maintained.

Here, the fixing member 644 may be provided as a nut.

In addition, a portion of the lower portion of the first case 632 excluding a portion in which the rectifier 120 is positioned may be formed adjacent to the load coil 114 .

Meanwhile, in the present embodiment, the load coil 114 is described as being positioned on the upper portion of the first case 632 , but the load coil 114 may be inserted and fixed inside the first case 632 . .

In addition, the resonance coil 112 may be supported by the outer guide 635a and the inner guide 635b provided in the second case 634, and accordingly, the resonance coil 112 and the case 130, specifically, the second case 634. The air gap 150 formed between the two cases 634 may be maintained as a constant space.

Preferably, a separate support member 635c may be further provided in the second case 634 .

The operation of the rotating device 10 using the wireless power supply device configured as described above is as follows.

First, the power transmission facility 1 provided outside may wirelessly transmit a high-frequency power signal according to the power applied by the power applying unit.

As described above, the high-frequency power signal wirelessly transmitted from the power transmission facility 1 may be received by the wireless power receiver 100 .

In this case, the resonance coil 112 of the wireless power receiver 100 may receive the high-frequency power signal wirelessly transmitted from the power transmission facility 1 in an electromagnetic sensitive resonance method.

In addition, the high-frequency power signal received from the resonance coil 112 and the load coil 114 may be supplied to the rectifier 120 , and may be rectified into DC power in the process of passing through the rectifier 120 .

The DC power rectified by the rectifier 120 may be transmitted to the outside of the case 130 of the wireless power receiver 100 through a wire.

On the other hand, N wireless power receiver 100 may be installed in the rotating body 12 of the rotating device 10, the rectifier 120 of the N wireless power receiver 100 is connected in series to stabilize the voltage It may be connected to the unit 30 .

The voltage stabilization unit 30 stabilizes the DC output voltage rectified from the rectifier 120 of the N wireless power receiver 100 to the voltage level required by the electric device, for example, the sensor, and then supplies it to the electric device, for example, the sensor. can be

The present invention is not limited by the above-described embodiments and the accompanying drawings, and it is common in the art that various types of substitutions, modifications and changes are possible within the scope without departing from the technical spirit of the present invention described in the claims. It will be self-evident to those with knowledge.

1: power transmission equipment 10: rotation device
12: rotating body 14: engaging projection
30: voltage stabilization unit 100: wireless power receiver
110: power receiver resonator 112: resonant coil
114: rod coil 120: rectifier
130: case 132: first case
134: second case 136: coupling cover
138: coupling groove 140: sealing material
142: fixing member 150: air gap

Claims (18)

delete a resonance coil for receiving a high-frequency power signal wirelessly transmitted from a power transmission facility by frequency resonance;
a load coil corresponding to the resonance coil to receive a high-frequency power signal;
a rectifier connected to the load coil to rectify and supply a high-frequency power signal; and
a case in which the resonance coil, the load coil, and the rectifier are integrally held therein, modularized, and provided to be sealed from the outside;
includes,
A wireless power receiver in which an air gap of a predetermined space is formed between the resonance coil and the adjacent case.
a resonance coil for receiving a high-frequency power signal wirelessly transmitted from a power transmission facility by frequency resonance;
a load coil corresponding to the resonance coil to receive a high-frequency power signal;
a rectifier connected to the load coil to rectify and supply a high-frequency power signal; and
a case in which the resonance coil, the load coil, and the rectifier are integrally held therein, modularized, and provided to be sealed from the outside;
includes,
the case is
A wireless power receiver divided into a first case and a second case, and comprising a sealing material provided between the first case and the second case.
The method according to claim 3, wherein the case
One of the first case and the second case has an outer diameter larger than the other, and a first spiral portion is formed on the outer circumferential surface,
In a state in which a sealing material is interposed between the first case and the second case
The other one of the first case and the second case is pressed from the outside of the other one of the first case and the second case, and the first spiral part of either one of the first case and the second case is spirally coupled. A wireless power receiver comprising a coupling cover having a second spiral portion to be.
The method according to claim 3, wherein the case
a first flange extending outwardly from the first case;
and a second flange extending to correspond to the first flange in the second case,
A wireless power receiver in which outer sides of the first flange and the second flange are coupled by a fastening member in a state in which a sealing material is interposed inside the first flange and the second flange.
4. The method of claim 3,
The sealing material is a wireless power receiver including an O-ring.
a rotating body provided with an electronic device; and
The wireless power receiver according to any one of claims 2 to 6 coupled to one side of the rotating body to supply power to the electronic device;
A rotating device comprising a.
8. The method of claim 7,
The rotating device further comprising at least one voltage stabilizing unit provided on one side of the rotating body to stabilize the DC output voltage rectified by the rectifier of the wireless power receiver to a voltage level required by the load.
9. The method of claim 8,
The wireless power receiver is provided in plurality and is connected in series through a wire,
The two output lines from the rectifier of the wireless power receiver are connected to the input lines of the voltage stabilization unit.
8. The method of claim 7,
It is provided on one side of the rotating body and includes N (N: a natural number of 2 or more) coupling protrusions to which the wireless power receiver is coupled,
The wireless power receiver is provided in the central portion of the case rotating device comprising a coupling groove to which the coupling protrusion is coupled.
11. The method of claim 10,
The coupling protrusion is a rotating device disposed at equal intervals along the circumferential direction of the rotating body.
11. The method of claim 10,
The coupling protrusion is formed with a third spiral portion on the outer circumferential surface,
A rotating device in which a fourth spiral portion helically coupled to the third spiral portion is formed in the coupling groove.
11. The method of claim 10,
Rotating device further comprising a fixing member fastened to one side of the coupling groove of the case in a direction orthogonal to the axis of the coupling projection.
11. The method of claim 10,
Rotating device further comprising a through-fixing member fastened through the coupling protrusion in a direction orthogonal to the axis of the coupling protrusion in the coupling groove of the case.
11. The method of claim 10,
The coupling protrusion is fitted and coupled to the coupling groove, and the case further includes a coupling member that penetrates through the coupling recess and is fastened to an end of the coupling protrusion.
11. The method of claim 10,
The coupling protrusion is installed through the coupling groove of the case, and a third spiral part is formed on the outer circumferential surface,
A rotating device in which a first fixing member and a second fixing member provided with a fifth spiral portion are screwed to the coupling protrusion to press and fix both ends of the case.
17. The method of claim 16,
Rotating device further comprising a pin member inserted into one side of the coupling protrusion in a direction perpendicular to the axis of the coupling protrusion to prevent loosening of the first fixing member or the second fixing member.
8. The method of claim 7,
The electronic device is a rotating device including a sensor for detecting the rotational state of the rotating body.

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