WO2016048008A1 - Wide area omni-directional wireless power transmission device - Google Patents

Abstract

The present embodiment relates to a wide area omni-directional wireless power transmission device which creates an omni-directional wireless charging environment and provides a uniform magnetic field over a wide area by generating a rotating magnetic field in a space to which to transmit power, using a multi-core and multi-winding structure.

Description

Wide-range omni-directional wireless power transmission device

This embodiment relates to a wide area omni-directional wireless power transmission device.

The contents described below only provide background information related to the present embodiment and do not constitute a prior art.

Recently, as the demand for smart electronic devices such as mobile devices, the Internet of Things, and wearable devices is rapidly increasing, such smart electronic devices have become essential elements for providing users with a ubiquitous environment. On the other hand, the power supply of the current smart electronic device is mostly used a battery charging method using a charger, in this case, there is a problem that must always be provided with a separate charger for charging the smart electronic device. In order to solve this problem, in the future, by providing a wireless charging area that can be wirelessly charged in a large space, such as Wi-Fi zone, through this, all the smart electronic devices in the wireless charging area can receive wireless power anytime and anywhere. New form of ubiquitous wireless power technology is expected to arrive

These ubiquitous wireless power technologies are 1) creating a uniform magnetic field that is safe for the user's body in the wireless charging area (below 27 uT, the ICNIRP guideline standard for magnetic fields), 2) long-range wireless power that can be received even at levels of tens of cm or more, The receiver needs to satisfy the chargeable 6-degrees of freedom in any spatial three directions (x, y, z axis) and three angles (Roll, Pitch, Yaw). Therefore, in order to create an optimal ubiquitous wireless power environment that satisfies the above three characteristics, the magnetic field generated from the transmitting device can be distributed evenly over a wide range, and regardless of the relative position between the transmitting device and the receiving device, There is a need for a wideband omni-directional wireless power transmission device that satisfies the ability to receive power.

This embodiment aims to create a non-directional wireless charging environment by providing a rotating magnetic field in a space to which power is to be transmitted using a multi-core and winding structure, and to provide a wide range of uniform magnetic fields.

In addition, the present embodiment, by installing a metal plate using a high conductivity material, such as copper plate, aluminum plate on one side of the wireless power transmission device to increase the magnetic flux density of the magnetic flux emitted by the wireless power transmission device and at the same time the internal magnetic flux density The purpose is to reduce the loss of the core by reducing.

In addition, the present embodiment is to minimize the degree of magnetic field generated around the magnetic core toward the human body by adding a magnetic field shielding member that can shield the magnetic field on one side of the wireless power transmission device.

In addition, the present embodiment is intended to create a non-directional wireless charging environment over a wide range by the wireless power transmission device is implemented in a modular form of a plurality of non-directional coils.

The present embodiment includes a wireless power transmitter including N (where N≥2) rod-shaped cores having a shape arranged to cross each other and a feeding cable wound around the N rod-shaped cores; And a receiver configured to receive the magnetic flux generated by the wireless power transmitter to generate power, wherein a current having a phase difference determined according to 180 ° / N is applied to each of the feed cables. to provide.

In addition, according to another aspect of the present embodiment, a dipole coil module including a core and a feed cable wound around the core and receiving an AC power to generate a magnetic field; And a separator disposed in a central portion of the dipole coil module based on a length direction of the dipole coil module and having a ring shape surrounding the dipole coil module.

In addition, according to another aspect of the present embodiment, the cylindrical core is installed in the vertical direction with respect to the ground relative to the ground; A feed cable wound around the tubular core; And a plurality of wings connected to one end of the tubular core and protruding in a direction not parallel to the longitudinal direction of the tubular core.

In addition, according to another aspect of the present embodiment, the rod-shaped core; A first wing positioned at one end of the rod-shaped core; A second wing positioned at the other end of the rod-shaped core; And a feed cable wound around the rod-shaped core, wherein the first wing and the second wing are provided in plural at both ends of the rod-shaped core.

In addition, according to another aspect of the present invention, in the wireless power transceiver, including a core having a length longer than the width or thickness, the core portion arranged in a grid structure (multi-core); And a winding including a plurality of windings, wound around each core included in the core, and generating a magnetic field by receiving AC power or receiving a magnetic field to induce a current. To provide.

In addition, according to another aspect of the present embodiment, it comprises at least one first core unit and at least one second core unit, wherein the at least one second core unit is arranged in a shape perpendicular to the first core unit cross-shaped A core part forming a shape; And a winding including a first winding wound around the first core unit and a second winding wound around the second core unit.

In addition, according to another aspect of the present invention, in the wireless power transmission device, comprising a plurality of coils each in the horizontal and vertical, each of the plurality of coils, each having a predetermined width and length; And a winding unit including a first winding wound on the core in a longitudinal direction of the core and a second winding wound on the core in a width direction of the core.

In addition, according to another aspect of the present embodiment, in the wireless power transmission apparatus, each of the plurality of winding modules in the horizontal and vertical, each of the plurality of winding modules, each of the at least two winding units in the horizontal and the vertical, respectively And a first winding unit and a third winding unit that face each other in a diagonal direction among the winding units, and have a predetermined phase difference with the second winding unit and the fourth winding unit that face each other in a diagonal direction among the winding units. Provided is a wireless power transmission apparatus characterized by forming a rotating magnetic field by applying a current having.

In addition, according to another aspect of the present invention, an apparatus for wirelessly transmitting power, comprising: a plurality of coil modules for generating a magnetic field evenly to receive or radiate the emitted magnetic field; A plurality of inverters (Inverter) for converting the frequency or phase of the AC power provided to each of the plurality of coil modules; The magnetic field generated by the coil module adjacent to the preset coil module in the plurality of coil modules, the induced current generated by the preset coil module by the magnetic field generated by the adjacent coil module, and transmitted by the control device connected to the adjacent coil module A plurality of receivers for receiving any one of a synchronization signal; A plurality of control devices for respectively controlling the plurality of inverters so that the magnetic fields generated in the plurality of coil modules have the same phase by using what each of the plurality of receiving devices receives; A power supply device for providing the AC power to the plurality of coil modules, respectively; And a plurality of switches positioned between the power supply device and each of the plurality of inverters to control the connection of each of the power supply device and the plurality of inverters.

As described above, according to the present embodiment, there is an advantage that a uniform magnetic field can be provided in a corresponding space by providing an equal magnetic field in two directions using a wireless power transmitter.

In addition, according to the present embodiment, there is an advantage that a three-way omni-directional wireless power transceiver can be implemented by using a two-way receiver in a two-way magnetic field generated by the transmitter in receiving the magnetic field.

In addition, according to the present embodiment, by installing a metal plate using a high conductivity material such as a copper plate, aluminum plate, etc. on one side of the wireless power transmission device to increase the magnetic flux density of the magnetic flux emitted by the wireless power transmission device and at the same time the internal magnetic flux There is an advantage in reducing the loss of the core by reducing the density.

In addition, according to the present embodiment, by adding a magnetic field shielding member that can shield the magnetic field on one side of the wireless power transmission device has the advantage that the magnetic field generated around the magnetic core can be directed to the human body.

In addition, according to the present embodiment, the wireless power transmission device is implemented in a modular form of a plurality of non-directional coils, there is an advantage that can create a non-directional wireless charging environment over a wide range.

1A is a perspective view illustrating a wireless power transmitter installed outdoors according to a first embodiment of the present invention.

1B is a perspective view showing a shape in which an upper transmitting coil module is provided at one end of a cylindrical core of a wireless power transmitter installed outdoors and a lower transmitting coil module is provided at the other end of the present invention.

Figure 2a is a perspective view showing a first upper transmitting coil module connected to one end of the cylindrical core according to the first embodiment of the present invention.

2B is a perspective view illustrating a second upper transmission coil module connected to one end of a cylindrical core according to the first embodiment of the present invention.

3A is a diagram illustrating a wireless power transmitter installed indoors according to a second embodiment of the present invention.

3B is a view showing a shape in which an auxiliary wing is additionally included in a wireless power transmitter installed indoors according to a second embodiment of the present invention.

4A illustrates a wireless power transmitter installed indoors according to a third embodiment of the present invention.

4B is a view showing the shape of the magnetic field generated from the wireless power transmitter installed in the room according to the third embodiment of the present invention.

5A is a diagram illustrating a first wireless power transmitter installed indoors according to a third embodiment of the present invention.

FIG. 5B is a diagram showing the shape of the magnetic field generated from the first wireless power transmitter installed indoors according to the third embodiment of the present invention.

6A is a diagram illustrating a form of a second wireless power transmitter installed indoors according to a third embodiment of the present invention.

6B is a view showing the structure of a wing of a second wireless power transmitter installed indoors according to a third embodiment of the present invention.

7 is a diagram schematically illustrating a wireless power transmitter according to a fourth embodiment of the present invention.

8 is a diagram schematically illustrating a wireless power transmitter according to a fifth embodiment of the present invention.

9 is a diagram schematically illustrating a wireless power transmitter according to a sixth embodiment of the present invention.

10 is a view schematically showing a wireless power transmitter according to a seventh embodiment of the present invention.

11 is a view showing the shape of a transmission coil module according to another embodiment of the present invention.

12A is a view showing a side view of a transmitting coil module provided with a reflector and a separator according to an embodiment of the present invention.

12B is a view illustrating a form of a transmission coil module having a reflector and a separator according to an embodiment of the present invention viewed from below.

FIG. 13 is a diagram schematically illustrating a case in which a power receiving device according to an embodiment of the present invention is mounted on a main body 100 of a mobile terminal.

14A is a diagram illustrating a case in which an auxiliary shield plate is additionally included in a power receiving device according to an embodiment of the present invention, and FIG. 14B is provided with a plurality of cores and a plurality of shield plates. It is a diagram conceptually showing how a magnetic field is shielded.

15 is a diagram illustrating a case where a shielding circuit is added to a power receiving device according to an embodiment of the present invention.

FIG. 16 is a diagram illustrating a case in which a fourth shielded loop circuit surrounding an end of a protrusion is added in a power receiving device according to an embodiment of the present invention.

17A is a view illustrating various shapes of a cross section of the trunk in the receiving core, and FIG. 17B is a view showing a change in length per turn according to the shape of the rectangle when the cross section of the trunk is rectangular, and FIG. 17C is a cross-sectional shape of the trunk. It is a figure which illustrates the case where it is a shape which combined rectangle and a circle.

18A is a diagram illustrating a case in which a human body approaches a power receiver according to an embodiment of the present invention, and FIG. 18B is a diagram illustrating an equivalent circuit for the entire receiver circuit in the power receiver, and FIG. 18C is a receiver. It is a figure which shows the example of reduction of reception power by the change of the resonance point of a circuit.

19 is a diagram illustrating a wireless power transmission and reception apparatus according to an embodiment of the present invention.

20 illustrates a normalized magnetic field emitted by a wireless power transmitter according to an embodiment of the present invention.

21 is a diagram illustrating a state in which a wireless power receiver receives a magnetic field according to an embodiment of the present invention.

22 is a diagram illustrating an equivalent magnetic circuit model of a wireless power receiver according to an embodiment of the present invention.

23A and 23B are diagrams illustrating respective wireless power transmitters and receivers having a difference in whether a metal plate is located according to an embodiment of the present invention.

24A and 24B illustrate equivalent magnetic circuit models of respective wireless power transmitters having a difference in whether a metal plate is located according to an embodiment of the present invention.

25A and 25B illustrate a normalized magnetic flux density emitted by each wireless power transmitter having a difference in whether a metal plate is located according to an embodiment of the present invention, and the wireless power transmitter in the z-axis direction. Figure is shown at a distance of half the width or length of the.

FIG. 26 illustrates a change in normalized magnetic flux density inside each wireless power transmitter having a difference in whether a metal plate is located according to an embodiment of the present invention.

27 to 30 is a view schematically showing a wireless power transmission device according to an embodiment of the present invention.

31 is a view showing a modular model of the wireless power transmission device according to an embodiment of the present invention.

32 to 36 is a view schematically showing a wireless power transmission device according to another embodiment of the present invention.

37A to 37C and 38A to 38B schematically illustrate a wireless power transmission apparatus according to another embodiment of the present invention.

39 is a view showing a modular model of the wireless power transmission device according to another embodiment of the present invention.

40 is an exemplary view illustrating an implementation form of the D-type winding module of the wireless power transmission device according to another embodiment of the present invention.

41A is a diagram illustrating a wireless power transfer system according to a first embodiment of the present invention.

41B is a diagram illustrating a wireless power transfer system according to a second embodiment of the present invention.

42A is a block diagram showing the configuration of a control device according to the first embodiment of the present invention.

42B is a block diagram showing the construction of a control device according to the second embodiment of the present invention.

43 is a flowchart illustrating a control method according to the first embodiment of the present invention.

44A is a diagram illustrating a transmitting coil module according to a first embodiment of the present invention.

44B is a view showing the shape of a magnetic field generated from the transmitting coil module according to the first embodiment of the present invention.

45 is a view showing the form and configuration of a transmitting coil module according to a second embodiment of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail through exemplary drawings. In adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible even though they are shown in different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, in describing the component of this invention, terms, such as 1st, 2nd, A, B, (a), b, can be used. These terms are only for distinguishing the components from other components, and the nature, order or order of the components are not limited by the terms. Throughout the specification, when a part is said to include, 'include' a certain component, which means that it may further include other components, except to exclude other components unless otherwise stated. . In addition, as described in the specification. The terms 'unit' and 'module' refer to a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software.

1A and 2B are views illustrating a wireless power transmitter 600 installed outdoors according to a first embodiment of the present invention, and FIGS. 3A and 3B are installed indoors according to a second embodiment of the present invention. A diagram illustrating a wireless power transmitter 800.

1A is a perspective view illustrating a wireless power transmitter installed outdoors according to a first embodiment of the present invention.

The wireless power transmitter 600 installed outdoors according to the present embodiment includes a tubular core 610, a power feeding cable 620, and a transmitting coil module 630.

The cylindrical core 610 is installed perpendicular to the ground with respect to the ground. The tubular core 610 is a tubular member, which is described as being elongated in a circular cylindrical shape in the present embodiment, but is not necessarily limited thereto. For example, the tubular core 610 may have various shapes such as a square pillar, a semi-circle cylinder, and a triangular pillar. . In FIG. 1A, the tubular core 610 is illustrated as a tower of the same thickness, but the tubular core 610 may have, for example, a thick central portion in the longitudinal direction, and become thinner toward both ends. For example, the cylindrical core 610 may be formed by stacking a plurality of rectangular rectangular core members, but the cylindrical core 610 may have a shape that is tapered toward both ends from a central portion in a step shape. In addition, the cylindrical core 610 may have, for example, a plurality of plate-shaped rectangular core members which overlap each other to have a core shape having an elongated and uniform thickness. Here, the cylindrical core 610 is composed of a magnetic material used to increase magnetic flux transmission.

The feed cable 620 is wound around the cylindrical core 610. Here, the feed cable 620 spirally wound the cylindrical core 610. Since the feed cable 620 is wound around one end of the cylindrical core 610, wireless charging in the z-axis direction is possible. The feed cable 620 may be, for example, Litz Wire. The feed cable wound around the cylindrical core 610 has an increase in magnetic flux density of about several orders of magnitude due to a decrease in magnetoresistance compared to feed cables that do not feed the cylindrical core 610. The feed cable 620 is wound around the cylindrical core 610 at a certain height. For example, the point at which the feed cable 620 is wound on the cylindrical core 610 is wound at a position higher than half of the cylindrical core 610 in the longitudinal direction of the cylindrical core 610, that is, the half of the height of the cylindrical core 610. do. Here, the point where the feed cable 620 is wound on the cylindrical core 610 is a certain height, for example, 3 m high depending on the electromagnetic wave strength for the safety of the person adjacent to the wireless power transmitter 600 installed outdoors. It may be wound, and in this case, it may be implemented by being wound at a height of at least half of the length of the cylindrical body 610. Although not shown in FIG. 1A, a cover surrounding the cylindrical core 610 and the feed cable 620 may be included.

In FIG. 1A, the feed cable 620 is illustrated as not being wound around one end of the rod-shaped core included in the transmitting coil module 630, but is not necessarily limited thereto. The feed cable 620 may spirally wrap one end of the rod-shaped core. When the feed cable 620 is wound around one end of the rod-shaped core included in the transmission coil module 630, wireless charging is possible in the x-axis and y-axis directions.

The transmitting coil module 630 may include a plurality of rod-shaped cores, and each of the rod-shaped cores is connected to one end of the cylindrical core 610 to protrude in a direction not parallel to the longitudinal direction of the cylindrical core 610. In FIG. 1A, one end of the cylindrical core 610 refers to an upper end of the cylindrical core 610. In addition, the other end of the cylindrical core 610 means the lower end of the cylindrical core 610. The transmitting coil module 630 further installs a lightning rod at one end connected to the cylindrical core 610. In FIG. 1A, the rod-shaped core included in the transmitting coil module 630 is illustrated as having a triangular shape as viewed from the top, but is not necessarily limited thereto. The transmitting coil module 630 protrudes perpendicular to the cylindrical core 610. Referring to FIG. 1A, the transmitting coil module 630 has a shape in which four bar cores are coupled in an “X” shape. Accordingly, the transmission coil module 630 having a plurality of rod-shaped cores formed in an “X” shape allows the magnetic field generated from the cylindrical core 610 and the feed cable 620 to be formed in a wide and uniform distribution. Here, as the number of rod-shaped cores included in the transmitting coil module 630 increases, a wider and more uniform magnetic field distribution is formed, and the omni-directional wireless power transmitter can be realized.

Although not shown in FIG. 1A, the wireless power transmitter 600 installed outdoors may include only a cylindrical core 610 and a feed cable 620. The feed cable 620 is wound around the cylindrical core 610. Accordingly, mobile device users can charge the mobile device in the z-axis direction.

1B is a perspective view showing a shape in which an upper transmitting coil module is provided at one end of a cylindrical core of a wireless power transmitter installed outdoors and a lower transmitting coil module is provided at the other end of the present invention.

The wireless power transmitter 600 installed outdoors according to the present embodiment includes a tubular core 610, a power feeding cable 620, and a transmitting coil module 630. Here, the transmitting coil module 630 includes an upper transmitting coil module 632 and a lower transmitting coil module 634.

The cylindrical core 610 is installed perpendicular to the ground with respect to the ground. The tubular core 610 is a tubular member, which is described as being long in a circular cylindrical shape in FIG. 1B, but is not necessarily limited thereto. For example, the tubular core 610 may have various shapes such as a square pillar, a semi-circle cylinder, and a triangular pillar.

The feed cable 620 is wound around the cylindrical core 610. Here, the feed cable 620 spirally wound the cylindrical core 610. Here, the feed cable 620 is wound around the cylindrical core 610 at a predetermined height. Although not shown in FIG. 1B, the feed cable 620 may be wound around one or more of the upper transmitting coil module 632 and the lower transmitting coil module 632.

The upper transmitting coil module 632 may include a plurality of upper bar cores connected to an upper end of the cylindrical core 610 to protrude in a direction not parallel to the longitudinal direction of the cylindrical core 610. Here, the upper end means a point farthest from the ground in the cylindrical core 610 based on the ground. The upper transmission coil module 632 is connected to the lightning rod 660 in a predetermined direction, for example, a direction upward at a point where the cylindrical core 610 is coupled. Here, the lightning rod 660 safely flows the impact current caused by the lightning strike to the ground. The upper transmitting coil module 632 includes a first upper rod core 642, a second upper rod core 644, a third upper rod core 646, and a fourth upper rod core 648. It is not necessarily limited thereto. The upper transmission coil module 632 allows the magnetic field generated from the cylindrical core 610 and the feed cable 620 to be formed in a wide and uniform distribution. Here, as the number of the upper bar cores included in the upper transmission coil module 632 increases, a wider and more uniform magnetic field distribution is formed.

Each of the plurality of upper rod-shaped cores may implement the same angle with the adjacent upper wing. The size of the angle formed by the first upper rod core 642 and the second upper rod core 644 may be, for example, 90 degrees (degrees). An angle between the second upper rod core 644 and the third upper rod core 646 may be, for example, 90 °. An angle formed by the third upper rod core 646 and the fourth upper rod core 648 may be, for example, 90 °. In addition, the size of the angle formed by the fourth upper rod core 648 and the first upper rod core 642 may be, for example, 90 °. FIG. 1B illustrates only four upper bar cores included in the upper transmitting coil module 632, but is not limited thereto.

The lower transmission coil module 634 may include a plurality of lower bar cores which are connected to the lower ends of the cylindrical core 610 and protrude in a direction not parallel to the longitudinal direction of the cylindrical core 610. Here, the lower end means a point closest to the ground in the cylindrical core 610 based on the ground. The lower transmission coil module 634 includes a first lower bar core 651, a second lower bar core 652, a third lower bar core 653, a fourth lower bar core 654, and a fifth A lower rod core 655 and a sixth lower rod core 656, but are not necessarily limited thereto. The lower transmission coil module 634 allows the magnetic field generated from the cylindrical core 610 and the feed cable 620 to be formed in a wide and uniform distribution. Here, the larger the number of lower rod cores included in the lower transmission coil module 634, the wider and more uniform magnetic field distribution is.

The plurality of lower bar cores may implement the same angle as the lower bar cores adjacent to each other. An angle between the first lower rod core 651 and the second lower rod core 652 may be, for example, 60 °. The size of the angle formed by the second lower rod core 652 and the third lower rod core 653 may be, for example, 60 °. An angle formed by the third lower rod core 653 and the fourth lower rod core 654 may be, for example, 60 °. The size of the angle formed by the fourth lower rod core 654 and the fifth lower rod core 655 may be, for example, 60 °. An angle formed by the fifth lower rod core 655 and the sixth lower rod core 656 may be, for example, 60 °. In addition, the size of the angle formed by the sixth lower rod core 656 and the first lower rod core 651 may be, for example, 60 °. FIG. 1B illustrates only six lower rod cores included in the lower transmission coil module 634, but is not limited thereto.

Figure 2a is a perspective view showing a first upper transmitting coil module connected to one end of the cylindrical core according to the first embodiment of the present invention.

The first upper transmitting coil module 636 includes a plurality of upper bar cores connected to one end of the cylindrical core 610 and protruding in a direction not parallel to the longitudinal direction of the cylindrical core 610. The first upper transmitting coil module 636 includes first to fourth upper bar cores 642, 644, 646, and 648. The first upper transmitting coil module 636 includes a first protrusion at a protruding end of the first upper transmitting coil module 636 in a direction different from that of the first upper transmitting coil module 636. Side by side with the ground

In FIG. 2A, the tip of the first upper bar core 642, the second upper bar core 644, the third upper bar core 646, and the fourth upper bar core 648 protrude in a predetermined direction, respectively. And a first protruding wing 712, a second protruding wing 714, a third protruding wing 716, and a fourth protruding wing 718. The first protruding vanes 712 protruding from the tip of the first upper rod-shaped core 642 have, for example, an angle of 90 ° with the first upper rod-shaped core 642. The second protruding vane 714 protruding from the tip of the second upper bar core 644 has an angle formed by the second upper bar core 644 at, for example, 90 °. The third protruding vane 716 protruding from the tip of the third upper rod-shaped core 646 has, for example, an angle of 90 ° with the third upper rod-shaped core 646. The fourth protruding vane 718 protruding from the tip of the fourth upper bar core 648 has, for example, an angle of 90 ° with the fourth upper bar core 648. Here, an angle formed between the first and fourth protruding vanes 712, 714, 716, and 718 protruding from the first and fourth upper bar cores 642, 644, 646, and 648, respectively, may be an obtuse angle. But it is not necessarily limited thereto.

In FIG. 2A, a plurality of feed cables are wound around one end of the first upper rod core 642, the second upper rod core 644, the third upper rod core 646, and the fourth upper rod core 648. Although not illustrated, the present invention is not limited thereto. The plurality of feed cables may be wound around the first upper rod core 642, the second upper rod core 644, the third upper rod core 646, and the fourth upper rod core 648.

2B is a perspective view illustrating a second upper transmission coil module connected to one end of a cylindrical core according to the first embodiment of the present invention.

The second upper transmitting coil module 638 is connected to one end of the cylindrical core 610 and includes a plurality of upper bar cores protruding in a direction not parallel to the longitudinal direction of the cylindrical core 610.

The second upper transmitting coil module 638 is perpendicular to the tips of the first to fourth upper bar cores 642, 644, 646 and 648, and the first to fourth upper bar cores 642, 644, 646 and 648, respectively. The first to fourth protruding wings 722, 724, 726, and 728 protruding in both directions, the center 730 of the second upper transmission coil module 638, and a plurality of corners 740.

The center 730 of the second upper transmission coil module 638 means a rectangular portion where the upper rod cores overlap. The second upper transmission coil module 638 and the first to fourth protruding wings 722, 724, 726, and 728 which are the second protrusions are parallel to the ground. The plurality of protruding double wings have a triangular shape when viewed from above.

The plurality of corners 740 are a portion of the second upper transmitting coil module 638 attached to the center 730 of the second upper transmitting coil module 638. The plurality of corners 740 may be provided with the upper bar cores at the center 730 of the second upper transmission coil module 638 such that the upper bar cores run near the center 730 of the second upper transmission coil module 638. Means an appended edge of length about the width.

In FIG. 2B, a plurality of feed cables are wound around one end of the first upper rod core 642, the second upper rod core 644, the third upper rod core 646, and the fourth upper rod core 648. Although not illustrated, the present invention is not limited thereto. The plurality of feed cables may be wound around the first upper rod core 642, the second upper rod core 644, the third upper rod core 646, and the fourth upper rod core 648.

3A is a diagram illustrating a wireless power transmitter installed indoors according to a second embodiment of the present invention.

The wireless power transmitter 800 installed indoors includes a rod-shaped core 810, a feed cable 820, a first wing 830, and a second wing 840.

The rod-shaped core 810 is a tubular member, but it is described as being formed in a cylindrical shape in FIG. 3a, but is not necessarily limited thereto.

The feed cable 820 is wound around the rod-shaped core 810. Here, the feed cable 820 spirally wound the rod-shaped core 810.

The first wing 830 and the second wing 840 are coplanar with the rod-shaped core 810 and are provided in plural at both ends of the rod-shaped core 810. The first wing 830 and the second wing 840 protrude in a direction perpendicular to the length direction of the rod-shaped core 810.

3B is a view showing a shape in which an auxiliary wing is additionally included in a wireless power transmitter installed indoors according to a second embodiment of the present invention.

The wireless power transmitter 800 installed indoors in FIG. 3B includes a rod-shaped core 810, a feed cable 820, a first wing 830, a second wing 840, and an auxiliary wing 850. .

The rod-shaped core 810 is a tubular member, but it is described as being formed in a cylindrical shape in FIG. 3a, but is not necessarily limited thereto.

The feed cable 820 is wound around the rod-shaped core 810. Here, the feed cable 820 spirally wound the rod-shaped core 810.

The first wing 830 and the second wing 840 are coplanar with the rod-shaped core 810 and are provided in plural at both ends of the rod-shaped core 810. The auxiliary wing 850 protrudes at an angle with a plane at both ends of the rod-shaped core 810.

4A illustrates a wireless power transmitter 910 installed indoors according to a third embodiment of the present invention, and FIG. 4B illustrates a wireless power transmitter installed indoors according to a third embodiment of the present invention. 910 is a view showing the shape of the magnetic field generated from.

4A illustrates a wireless power transmitter installed indoors according to a third embodiment of the present invention.

FIG. 4A illustrates a wireless power transmitter 910 installed indoors according to a third embodiment of the present invention, wherein the linear transmission coil module 920 disposed vertically and the linear transmission disposed horizontally. The transmission coil module 930 is vertically overlapped to have a cross shape. In the wireless power transmitter 910 installed in the room shown in FIG. 4A, the overlapping portion does not wind the winding, but winds the winding on portions other than the overlapping portion.

The transmission coil module included in the wireless power transmitter 910, that is, the rod-shaped core may be provided with N (N≥2), receiving unit for generating power by receiving the magnetic flux generated in the wireless power transmitter 910 and In addition, it can be implemented as a wireless power transceiver. In this case, a current having a phase difference determined according to 180 ° / N may be applied to each of the feed cables wound around the N transmitting coil modules in the wireless power transmitter 910. In addition, the transmitting coil module is located side by side in the longitudinal direction of the transmitting coil module on one side of the transmitting coil module, and may be implemented in a form further comprising a reflector plate positioned at a predetermined interval with the transmitting coil module, each transmitting coil Wings may be provided at each end of the module. Meanwhile, the power receiver shown in FIG. 13 may be used as the receiver.

4B is a view showing the shape of the magnetic field generated from the wireless power transmitter installed in the room according to the third embodiment of the present invention.

The linear transmitting coil module 920 disposed vertically in FIG. 4A radiates a magnetic field in the x-axis direction shown in FIG. 4B from one end to the other end of the transmitting coil module. The linear transmitting coil module 930 arranged horizontally in FIG. 4A radiates a magnetic field in the x-axis direction shown in FIG. 4A from one end to the other end of the transmitting coil module. When each linear transmission coil module radiates a magnetic field, each inverter controls the phase of the AC power supplied to each linear transmission coil module to have a difference of 90 degrees. For example, suppose that an alternating current power of sin (ω * t) is supplied to the linear transmitting coil module 920 arranged vertically in FIG. 4A, sin (ω * t) is supplied to the linear transmitting coil module 930 arranged horizontally in FIG. 4A. Each inverter controls the phase of the AC power so that AC power of? * t + 90) is supplied. Accordingly, the magnetic field generated in each transmitting coil module also has a phase difference of 90 degrees. Since the magnetic field generated in each transmitting coil module has a phase difference of 90 degrees, and each transmitting coil module is vertically disposed so as to have a physical phase of 90 degrees, the composite magnetic field 940 of the magnetic field generated in each transmitting coil module is placed. As shown in FIG. 4B, a rotating magnetic field having a uniform magnetic field size is generated in a predetermined region.

Since the wireless power transmitter 910 installed indoors is a transmission coil module in which two linear transmitter coil modules overlap each other, the power received by the receiver receiving the magnetic field from the wireless power transmitter 910 installed indoors is installed in the straight indoors. It becomes larger than the wireless power transmitter 910. In addition, since the wireless power transmitter 910 installed indoors radiates the composite magnetic field 940 of the magnetic field generated by the vertical and horizontal transmission coil modules, the wireless power transmitter 910 is installed to a wider range than the magnetic field generated by the linear transmission coil module. Emits a magnetic field

FIG. 5A illustrates a first wireless power transmitter installed indoors according to a third embodiment of the present invention, and FIG. 5B illustrates a first wireless power transmitter installed indoors according to another embodiment. It is a figure which shows the shape of the magnetic field.

FIG. 5A illustrates a first wireless power transmitter 1010 installed indoors according to a third exemplary embodiment of the present invention having a star shape by overlapping three linear transmission coil modules. The first wireless power transmitter 1010 overlaps each linear transmitter coil module by arranging three linear transmitter coil modules 1020, 1030, and 1040 to have a difference of 60 degrees from each other. In the linear transmission coil module, the winding is wound around the center of the ferrite core. The first wireless power transmitter 1010 does not wind the winding on the overlapping portion, but winds the winding on the portion other than the overlapping portion.

5B illustrates the form of the magnetic field generated from the first wireless power transmitter 1010. Each straight transmitting coil module shown in FIG. 5A radiates a magnetic field in the x-axis direction shown in FIG. 4A from one end to the other end of each transmitting coil module. When each linear transmission coil module radiates a magnetic field, each inverter controls the phase of the AC power supplied to each linear transmission coil module to have a difference of 120 degrees. For example, suppose that AC power of sin (ω * t) is supplied to one linear transmission coil module 1020 in FIG. 5A, AC (sin * ω + t + 620) AC is supplied to the other linear transmission coil module 1030. Each inverter controls the phase of the AC power so that power is supplied and AC power of sin (ω * t + 740) is supplied to another linear transmission coil module 1040. Accordingly, the magnetic field generated in each transmitting coil module also has a phase difference of 120 degrees. Since the magnetic field generated in each transmitting coil module has a phase difference of 120 degrees, and each transmitting coil module is vertically disposed so as to have a physical phase of 60 degrees, the composite magnetic field 1050 of the magnetic field generated in each transmitting coil module is placed. As shown in FIG. 5B, a rotating magnetic field having a uniform magnetic field size is generated in a predetermined region.

Since the first wireless power transmitter 1010 is a transmission coil module in which three linear transmitter coil modules are overlapped, the power generated by the receiver receiving the magnetic field from the first wireless power transmitter 1010 is greater than that of the linear transmitter coil module. In addition, since the first wireless power transmitter 1010 has three linear transmission coil modules physically disposed with an angular difference of 60 degrees, the first wireless power transmitter 1010 is a magnetic field generated by the linear transmission coil module. Emits a magnetic field up to a wider range.

FIG. 6A is a view illustrating a form of a second wireless power transmitter installed indoors according to a third embodiment of the present invention, and FIG. 6B is a second wireless power installed indoors according to a third embodiment of the present invention. Figure showing the structure of the blade of the transmission device.

FIG. 6A illustrates a second wireless power transmitter 1110 installed indoors according to a third embodiment of the present invention, including a center 1120 of a ferrite core, a plurality of branches 1130a to d, and a plurality of wings 1140a to d. ), A plurality of windings 1150a to d and a plurality of edges 1160a to d.

The second wireless power transmitter 1110 installed indoors has branches 1130 extending in four directions perpendicular to each other at the center 1120 of the ferrite core. The center 1120 of the ferrite core refers to a rectangular portion where the branches overlap. Branch 1130 is a ferrite core extending from the center and each branch has a constant width.

Each branch has wings 1140 at the end of each branch. The plurality of wings 1140 have a thick central portion and have a tapering shape toward the end.

The plurality of windings 1150 of the second wireless power transmitter 1110 installed indoors are wound at ends of the wings in each branch. The windings are wound at the ends of the wings in each branch because the distribution of the magnetic field increases as the windings are moved from the branch to the wings.

The edge 1160 is a ferrite core attached to the center 1120 of the ferrite core, and prevents the synthetic magnetic field of the magnetic field generated from the branches 1170 in the horizontal direction and the branches 1180 in the vertical direction from being saturated. The magnetic field resulting from the horizontal or vertical branches is less than the saturation value of the magnetic field. However, there is a concern that the magnetic field may be saturated at the central portion 1120 of the ferrite core where the magnetic fields generated from the branches 1170 in the horizontal direction and the branches 1180 in the vertical direction are summed. To prevent the magnetic field from saturating, the edges of about the width of the branch are added to the center 1120 of the ferrite core so that each branch runs near the center 1120 of the ferrite core of the branch. The added edges increase the cross-sectional area of the center 1120 of the ferrite core, and as the cross-sectional area increases, the saturation value of the magnetic field increases. That is, by adding edges such that the magnetic fields generated from the branches 1170 in the horizontal direction and the branches 1180 in the vertical direction have a saturation value of the magnetic field larger than the combined magnetic field, the magnetic field is formed at the center 1620 of the ferrite core. Can prevent saturation

6B is a view showing the structure of a wing of a second wireless power transmitter installed indoors according to a third embodiment of the present invention.

In FIG. 6B, the wings 1140 are shown to be symmetrical about the ends of the branches 1630 (θ ₁ = θ ₂ ), but are not necessarily limited thereto, and are not necessarily limited to θ ₁ ≠ θ ₂ or θ ₁ or Asymmetrical structures in which θ ₂ is zero are also possible. The larger θ ₁ + θ _2, the greater the distribution and intensity of the magnetic field. However, the distribution and intensity of the magnetic field do not increase continuously as θ ₁ + θ ₂ increases, but when θ ₁ + θ ₂ increases above a certain level, the magnetic fields radiated from each wing cause mutual interference, The distribution and intensity are reduced. In addition, the angle θ ₃ between the wing and the branch also affects the distribution of the magnetic field. When θ ₃ is smaller than a certain angle, the magnetic field is larger, and when θ ₃ is larger than a certain angle, the magnetic field is smaller.

In the above description, the ferrite core is inserted into the winding in order to reduce the magnetoresistance inside the winding. However, the present invention is not limited thereto, and a core capable of reducing the magnetoresistance in the winding may replace the ferrite core. Can be.

7 to 10 illustrate embodiments of the wireless power transmission apparatus that may be implemented in various forms according to the additional installation of the reflector and the separator.

7 is a diagram schematically illustrating a wireless power transmitter according to a fourth embodiment of the present invention.

The wireless power transmitter 1200 according to the fourth embodiment of the present invention includes a dipole coil module 1210 and a reflector 1220. The wireless power transmitter 1200 according to the first embodiment of the present invention is preferably installed on a ceiling of a space such as an office, a living room, or a public place to form the space as a Wi-Power Zone. Can be.

The dipole coil module 1210 includes a core 1212 and a feed cable 1214 wound around the core 1212 and receiving an AC power to generate a magnetic field.

The core 1212 is a magnetic material used to increase magnetic flux transmission and is implemented in a rod-shaped shape having a length longer than the width or thickness of the core 1212. The core 1212 according to the present exemplary embodiment preferably has a thick central portion in the longitudinal direction and a thinner shape toward both ends. That is, the core 1212 is made by overlapping a plurality of plate-shaped rectangular core members, the shape of the core 1212 in the form of a step becomes thinner toward both ends from the center portion. In this case, the magnetic flux density is uniformly induced in the core 1212, and the wireless power transmitter 1200 may evenly distribute a magnetic field for wireless power transmission at a predetermined distance. Meanwhile, in FIG. 7, the core 1212 has a thick central shape in the longitudinal direction and a thinner shape toward both ends, but is not necessarily limited thereto, and may be implemented in the form of a rectangular parallelepiped core member. It may be implemented in the form of a plate having a plurality of overlapping elongated and uniform thickness.

Meanwhile, the number of cores 1212 provided in the dipole coil module 1210 may be singular or plural. In FIG. 7A, a single core 1212 is illustrated, and FIG. 7B illustrates a single core 1212. When the number of cores 1212 provided in the dipole coil module 1210 is provided in plural numbers, the magnetic field may have an effect of forming a wide and uniform distribution. As shown in FIG. 7B, when a plurality of cores 1212 are implemented, each core is implemented to cross each other at one point, for example, at the center of the core. In this case, the size of the angle formed by each core with the adjacent core may be set at various angles according to the number and size of the cores. Meanwhile, in FIG. 7B, the dipole coil module 1210 includes two cores, and an angle between the cores is illustrated as a cross shape in which the core forms 90 °, but is not necessarily limited thereto. For example, the dipole coil module 1210 may include three cores, and may be implemented in a star shape in which an angle between each core is 60 °. Although not shown in FIG. 7B, a feed cable wound around a plurality of cores, this is merely an example for clearly describing a case in which the dipole coil module 1210 according to the present embodiment is implemented with a plurality of cores. As a result, a feed cable is wound around each core.

The feed cable 1214 is wound in a spiral wrap around the core 1212 and may be implemented, for example, with a Litz Wire. In the present embodiment, the core 1212 is inserted into the feed cable 1214, thereby reducing the magnetoresistance generated in the space inside the feed cable 1214. On the other hand, the feed cable 1214 having the core 1212 inserted therein increases the magnetic flux density by about several tens of times through the reduction of the magnetoresistance compared to the feed cable that does not have the feed cable 1214.

The reflecting plate 1220 is positioned side by side in the longitudinal direction of the dipole coil module 1210, that is, the core 1212, on one side of the dipole coil module 1210, and is installed at a predetermined distance from the dipole coil module 1210. On the other hand, when the dipole coil module 1210 includes a plurality of cores, the reflecting plate 1220 is located side by side in the longitudinal direction of any one of the plurality of cores. In FIGS. 7A and 7B, the reflector 1220 is positioned above the dipole coil module 1210. However, the reflector 1220 is most suitable when the wireless power transmitter 1200 according to the present embodiment is designed to have a ceiling shape. As an example illustrating an arrangement position of, the present invention is not necessarily limited thereto. For example, the reflector 1220 may be located on all sides of the dipole coil module 1210, thereby amplifying a magnetic field generated in a direction opposite to the direction in which the reflector 1220 is located. The wireless power transmitter 1200 may further include a support (not shown) for maintaining a position gap between the reflector plate 1220 and the dipole coil module 1210.

The wireless power transmitter 1200 according to the fourth embodiment of the present invention blocks the magnetic field leaking in an undesired direction by additionally installing the reflector plate 1220 in the dipole coil module 1210, and further increases the magnetic field in the desired direction. It can be applied strongly. That is, when the magnetic field generated from the dipole coil module 1210 is incident on the reflecting plate 1220, the reflecting plate 1220 generates a current (eddy current) that rotates in a direction opposite to the incident direction of the magnetic field. Due to this current, the reflector 1220 generates a magnetic field in a direction opposite to the direction of incidence of the magnetic field, whereby the magnetic field in the direction of incidence of the magnetic field is blocked, while the magnetic field in a direction opposite to the direction of incidence of the magnetic field is Is amplified. Referring to FIG. 17, the reflector 1220 blocks a magnetic field incident to an upper direction of the dipole coil module 1210 in which the reflector 1220 is positioned and amplifies a magnetic field applied downward. That is, when the wireless power transmitter 1200 according to the fourth embodiment of the present invention is designed to be ceiling type, the wireless power transmission unit located below the wireless power transmitter 1200 by applying a magnetic field in a downward direction more strongly. This results in an effect that allows power to be delivered to the device more efficiently.

In the wireless power transmitter 1200 according to the fourth embodiment of the present invention, the reflecting plate 1220 is preferably installed at a predetermined interval from the dipole coil module 1210 and surrounds one side of the dipole coil module 1210. Is done. That is, the reflecting plate 1220 is formed in a form that surrounds one side of the dipole coil module by bending both sides in the position direction of the dipole coil module 1210 based on the length direction of the dipole coil module 1210 as shown in FIG. 7A. In addition, it may be implemented in a circular shape as shown in Figure 7b may be formed to surround one side of the dipole coil module. On the other hand, the structure of the reflector 1220 is not necessarily implemented in a specific form, various forms in consideration of the size, weight, cost, amplification degree and the number of cores included in the dipole coil module 1210, etc. It can be implemented as. For example, the structure of the reflector 1220 may be implemented in various forms such as flat, circle, and parabolic. Similarly, the size, thickness, and distance from the dipole coil module 1210 of the reflector 1220 may also be set in consideration of the size, weight, cost, and amplification degree of the reflector 1220. The reflector 1220 is preferably made of a metal material having a low permeability, for example, aluminum, but is not necessarily limited thereto.

8 is a diagram schematically illustrating a wireless power transmitter according to a fifth embodiment of the present invention. 8 illustrates a path of a magnetic field generated by the wireless power transmitter according to the fifth embodiment of the present invention.

The wireless power transmitter 1300 according to the fifth embodiment of the present invention includes a dipole coil module 1210 and a separator 1310. The wireless power transmitter 1300 according to the second embodiment of the present invention is preferably installed in a tower shape in a space such as an office, a living room, or a public place to form the space as a wireless power charging area.

The dipole coil module 1210 includes a core 1212 and a feed cable 1214 wound around the core 1212 and receiving an AC power to generate a magnetic field. In the wireless power transmitter 1300 according to the second embodiment of the present invention, the dipole coil module 1210 may be disposed in a vertical or horizontal form on the ground.

The core 1212 is embodied in the same shape as the core 1212 of the wireless power transmitter 1200 according to the fourth embodiment of the present invention. That is, the core 1212 may be implemented in a form having a thick central portion in the longitudinal direction and having a shape that is thinner toward both ends, or may be implemented in a plate having a uniform thickness. In addition, a plurality of cores 1212 may be provided. On the other hand, the wireless power transmission apparatus 1300 according to the fifth embodiment of the present invention may be installed in a tower shape, in this case, the core 1212 is disposed in a form perpendicular to the ground. The wireless power transmitter 1300 may further include a support (not shown) for maintaining the arrangement of the core 1212 in a form perpendicular to the ground. Hereinafter, the wireless power transmitter 1300 according to the second embodiment of the present invention is implemented in a tower form to illustrate the case in which the dipole coil module 1210, that is, the core 1212 is disposed in a form perpendicular to the ground. do.

The feed cable 1214 is implemented in the same shape as the feed cable 1214 of the wireless power transmitter 1200 according to the fourth embodiment of the present invention. Similarly, the dipole coil module 1210 of the wireless power transmitter 1200 according to the second embodiment of the present invention is implemented in such a manner that the core 1212 is inserted into the feed cable 1214 to feed the inside of the feed cable 1214. The magnetoresistance generated in space can be reduced.

The separator 1310 is preferably installed at the center of the dipole coil module 1210 based on the length direction of the dipole coil module 1210 and has an annular shape, for example, a disc shape, surrounding the dipole coil module 1210. Meanwhile, the separator 1310 is predetermined from the dipole coil module 1210 so as to face the feed cable 1214 when the feed cable 1214 is positioned at the center of the dipole coil module 1210 on which the separator 1310 is installed. It is installed at intervals. In this case, the wireless power transmitter 1300 may further include a support (not shown) for maintaining a position gap between the separator 1310 and the dipole coil module 1210. In FIG. 8, the separator 1310 is illustrated as being positioned at the center portion of the dipole coil module 1210 based on the length direction of the dipole coil module 1210. The embodiment illustrating the arrangement position of the suitable reflector is not necessarily limited thereto.

In the wireless power transmitter 1300 according to the fifth embodiment of the present invention, a magnetic field generated from the dipole coil module 1210 bypasses the separator 1310 by installing the separator 1310 in the dipole coil module 1210. To form a magnetic path. That is, the magnetic field generated from the dipole coil module 1210 forms a magnetic path returning to the distant place by bypassing the separator 1310 by the structure and material of the separator 1310, and thus, the separator 1310 is Compared to the wireless power transmitter which is not additionally provided, the magnetic field is distributed evenly in the wireless power transmission area and causes the effect of having a wider transmission area. When the wireless power transmission apparatus 1300 according to the fifth embodiment of the present invention is installed in a tower type, this effect serves as a greater advantage.

Similarly, in the wireless power transmitter 1300 according to the fifth embodiment of the present invention, the structure, size, thickness, and spacing of the dipole coil module 1210 and the separator 1310 in the separator 1310 are separated from the separator 1310. ) May be set in consideration of size, weight, cost, and amplification degree. The separator 1310 is preferably made of a metal material having a low permeability, for example, aluminum, but is not necessarily limited thereto.

9 is a diagram schematically illustrating a wireless power transmitter according to a sixth embodiment of the present invention. 9 illustrates a path of a magnetic field generated by the wireless power transmitter according to the sixth embodiment of the present invention.

The wireless power transmitter 1400 according to the sixth embodiment of the present invention includes a dipole coil module 1210, a separator 1310, and a plurality of auxiliary separators 1410. Meanwhile, the wireless power transmitter 1400 according to the sixth embodiment of the present invention wirelessly installs a plurality of auxiliary separators 1410 in the wireless power transmitter 1300 according to the fifth embodiment of the present invention. The effect of power transfer is further increased.

The dipole coil module 1210 includes a core 1212 and a feed cable 1214 wound around the core 1212 and receiving an AC power to generate a magnetic field. In the wireless power transmitter 1400 according to the third embodiment of the present invention, the dipole coil module 1210 may be disposed in a vertical or horizontal form on the ground.

The core 1212 is embodied in the same shape as the core 1212 of the wireless power transmitter 1200 according to the fourth embodiment of the present invention, and a detailed description thereof will be omitted. On the other hand, the wireless power transmitter 1400 according to the sixth embodiment of the present invention may be designed in a tower shape, in this case, the core 1212 is disposed in a form perpendicular to the ground.

The feed cable 1214 is implemented in the same shape as the feed cable 1214 of the wireless power transmitter 1200 according to the fourth embodiment of the present invention, and a detailed description thereof will be omitted.

The separator 1310 is implemented and arranged in the same shape as the separator 1310 of the wireless power transmitter 1300 according to the fifth embodiment of the present invention. That is, the separator 1310 is preferably installed at the central portion of the dipole coil module 1210 based on the length direction of the dipole coil module 1210, and has an annular shape, for example, a disk shape surrounding the dipole coil module 1210.

The plurality of auxiliary separators 1410 are positioned at a predetermined distance from the separator 1310 in the longitudinal direction of the dipole coil module 1210 and have an annular shape surrounding the dipole coil module 1210. The plurality of auxiliary separators 1410 may face the feed cable 1214 when the feed cable 1214 is positioned at the point of the dipole coil module 1210 where the plurality of auxiliary separators 1410 are installed. 1210 are provided at predetermined intervals. On the other hand, the core 1212 of the dipole coil module 1210 according to the present embodiment may be implemented in a form having a central portion in the longitudinal direction has a thick shape and toward the ends. In this case, the auxiliary separators installed at both ends are positioned in the dipole coil module 1210 in a form bent at a predetermined angle according to the implementation form of both ends, but is not necessarily limited thereto. The distance between the separator 1310 and the plurality of auxiliary separators 1410 is calculated and set in advance in consideration of power transmission efficiency.

In the wireless power transmitter 1400 according to the sixth embodiment of the present invention, the separator 1310 and the plurality of auxiliary separators 1410 are implemented in a ring shape, and have different diameters. For example, the diameters of the plurality of auxiliary separators 1410 may be smaller than the diameters of the separators 1310 and may decrease toward both ends of the dipole coil module 1210 based on the length direction of the dipole coil module 1210. Is implemented. Through this, the wireless power transmitter 1400 according to the sixth embodiment of the present invention causes an effect of increasing the power of the output terminal compared with the wireless power transmitter 1300 according to the fifth embodiment of the present invention.

The wireless power transmitter 1400 according to the sixth embodiment of the present invention is further provided with a separator 1310 and a plurality of auxiliary separators 1410 in the dipole coil module 1210 from the dipole coil module 1210. The generated magnetic field forms a magnetic path bypassing the separator 1310 and the plurality of auxiliary separators 1410. That is, the magnetic field generated from the dipole coil module 1210 bypasses the separator 1310 and the plurality of auxiliary separators 1410 by the structures and materials of the separator 1310 and the plurality of auxiliary separators 1410. The path is formed, which causes the magnetic field to be evenly distributed within the wireless power transmission area, while also having the effect of having a wider transmission area. Furthermore, the wireless power transmitter 1400 further includes a plurality of auxiliary separators 1410, and the separator 1310 and the plurality of auxiliary separators 1410 are implemented in a form having different diameters. This results in an effect of further increasing the wireless power transmission efficiency compared to the wireless power transmitter 1300 according to the fifth embodiment of the present invention.

Similarly, in the wireless power transmitter 1400 according to the sixth embodiment of the present invention, the structure, size, thickness, and spacing of the dipole coil module 1210 of the separator 1310 and the auxiliary separator 1410 are separated from the separator. The size, weight, cost, and amplification degree of the 1313 and the auxiliary separator 1410 may be set in consideration. The separator 1310 and the auxiliary separator 1410 are preferably made of a metal material having a low permeability, for example, aluminum, but are not necessarily limited thereto.

10 is a view schematically showing a wireless power transmitter according to a seventh embodiment of the present invention. 10A and 10B illustrate a wireless power transmitter 1500 viewed from another side, respectively.

The wireless power transmitter 1500 according to the seventh embodiment of the present invention includes a dipole coil module 1210, a reflector plate 1510, and a separator plate 1520. The wireless power transmitter 1500 according to the seventh embodiment of the present invention is preferably installed on a ceiling or a wall of a space such as an office, a living room, or a public place to form the space as a wireless power charging area.

The dipole coil module 1210 includes a core 1212 and a feed cable 1214 wound around the core 1212 and receiving an AC power to generate a magnetic field.

The core 1212 is embodied in the same shape as the core 1212 of the wireless power transmitter 1200 according to the fourth embodiment of the present invention, and a detailed description thereof will be omitted. On the other hand, the core 1212 is disposed in a form parallel to the ground when the wireless power transmitter 1500 is installed on the ceiling, and is perpendicular to the ground when the wireless power transmitter 1500 is installed on the wall. Is placed. In FIG. 10, an arrangement form when the wireless power transmitter 1500 is installed on a wall will be described.

The feed cable 1214 is implemented in the same shape as the feed cable 1214 of the wireless power transmitter 1200 according to the fourth embodiment of the present invention, and a detailed description thereof will be omitted.

The reflecting plate 1510 is positioned side by side in the longitudinal direction of the dipole coil module 1210 on one side of the dipole coil module 1210. That is, the reflector plate 1510 is installed at one side of the dipole coil module 1210 at a predetermined interval with the dipole coil module 1210, and is implemented in the form of a plate having an elongated shape in the longitudinal direction of the dipole coil module 1210 wall surface It has a structure attachable to it. In this case, one side of the dipole coil module 1210 in which the reflecting plate 1510 is located means a direction in which no magnetic field is used. The wireless power transmitter 1500 according to the seventh embodiment of the present invention blocks a magnetic field leaking in an undesired direction by installing a reflector 1510 at one side of the dipole coil module 1210, for example, in a direction not using a magnetic field. On the other hand, it is possible to apply the magnetic field more strongly in the desired direction.

The separator 1520 is preferably installed at the center of the dipole coil module 1210 based on the length direction of the dipole coil module 1210 and has a semi-circular shape surrounding the other side of the dipole coil module 1210. Meanwhile, the separator 1520 is predetermined from the dipole coil module 1210 so as to face the feed cable 1214 when the feed cable 1214 is positioned at the center of the dipole coil module 1210 in which the separator 1520 is installed. It is installed at intervals. The wireless power transmitter 1500 according to the seventh embodiment of the present invention transmits wireless power over a longer distance by installing the separator 1520 on the other side of the dipole coil module 1210, for example, in a direction in which a magnetic field is to be used. It produces a possible effect.

That is, in the wireless power transmitter 1500 according to the seventh embodiment of the present invention, the reflection plate 1510 is installed on one side of the dipole coil module 1210 and the separator 1520 is provided on the other side opposite to the one side. While applying the magnetic field more strongly in the desired direction, it causes the effect of having a wider transmission area. For example, when the wireless power transmitter 1500 according to the fourth exemplary embodiment of the present invention is disposed on a wall surface, the reflective plate 1510 is additionally provided on one side of the dipole coil module 1210 corresponding to the direction in which the wall surface is located. While blocking the magnetic field leaking in the direction in which the wall surface is located, it is possible to apply the magnetic field more strongly in the direction opposite to the direction in which the wall surface is located. In addition, in the wireless power transmitter 1500 according to the seventh embodiment of the present invention, the other side of the dipole coil module 1210, for example, the other side by installing the separator 1520 in a direction opposite to the direction in which the wall surface is located. The magnetic field generated by this bypasses the separator 1520 to form a magnetic path back to a distant place.

Meanwhile, although FIG. 10 illustrates that the reflecting plate 1510 is implemented in a plate shape having an elongated shape, the separator 1520 is implemented in a semi-circular form surrounding the dipole coil module 1210, but is not necessarily limited thereto. . The reflector 1510 and the separator 1520 may be implemented in various forms in consideration of the size, weight, cost, and amplification degree of the reflector 1510 and the separator 1520, respectively. For example, the reflector plate 1510 may be implemented in a mesh structure or a flat structure having a grid pattern. Similarly, the size, thickness, and distance from the dipole coil module 1210 of the reflector plate 1510 and the grating plate 1520 are also set in consideration of the size, weight, cost, and amplification degree of the reflector plate 1510 and the grating plate 1520, respectively. Can be. The reflective plate 1510 and the grating plate 1520 are preferably made of a metal material having a low permeability, for example, aluminum, but are not necessarily limited thereto.

11 is a diagram illustrating a form of a transmitting coil module 1610 according to another embodiment of the present invention.

As shown in FIG. 11, the transmitting coil module 1610 according to another embodiment of the present invention includes a center 1620 of the ferrite core, a plurality of branches 1630a to d, a plurality of wings 1640a to d, and a plurality of wings. Windings 1650a through d and a plurality of edges 1660a through d.

The transmitting coil module 1610 has branches 1630 extending in four directions perpendicular to each other at the center 1620 of the ferrite core. The center 1620 of the ferrite core refers to a rectangular portion where the branches overlap. Branch 1630 is a ferrite core extending from the center and each branch has a constant width.

Each branch has wings 1640 at the end of each branch. The plurality of wings 1640 have a thick central portion and have a taper shape toward the end.

A plurality of windings 1650 of the transmission coil module 1610, for example, a feed cable, is wound at the end of the blade direction of each branch. The windings are wound at the ends of the wings in each branch because the distribution of the magnetic field increases as the windings are moved from the branch to the wings.

The edge 1660 is a ferrite core attached to the center 1620 of the ferrite core and prevents the synthetic magnetic field of the magnetic field generated from the branches 1670 in the horizontal direction and the branches 1680 in the vertical direction from saturating. The magnetic field resulting from the horizontal or vertical branches is less than the saturation value of the magnetic field. However, in the center 1620 of the ferrite core where the magnetic fields generated from the branches 1670 in the horizontal direction and the branches 1680 in the vertical direction are combined, the magnetic field may be saturated since the magnetic field is larger than the saturation value of the magnetic field. In order to prevent the magnetic field from saturating, a branch about the width of the branch is added to the center 1620 of the ferrite core so that each branch runs near the center 1620 of the ferrite core of the branch. The added edges increase the cross-sectional area of the center 1620 of the ferrite core, and as the cross-sectional area increases, the saturation value of the magnetic field increases. That is, by adding edges such that the magnetic fields generated from the branches 1670 in the horizontal direction and the branches 1680 in the vertical direction have a saturation value of the magnetic field that is larger than the combined magnetic field, the magnetic field at the center 1620 of the ferrite core is added. Can prevent saturation

Similarly, the transmitting coil module 1610 according to another embodiment of the present invention may be implemented in a form that further includes a reflecting plate and a grating plate on one side.

12A is a view showing a side view of a transmitting coil module having a reflector and a separator according to an embodiment of the present invention, and FIG. 12B is a view showing a reflector and a separator according to an embodiment of the present invention. Figure showing the form of the transmission coil module viewed from below.

12A and 12B, the reflection plate 1710 is installed in a direction opposite to the direction in which the transmitting coil module intends to emit a magnetic field. As shown in FIG. 12B, the reflector 1710 is sufficient to cover the transmission coil module shown in FIG. 11, and a reflector larger than that is unnecessary. The transmitting coil module is installed in a direction opposite to the direction in which the magnetic field is to be radiated, so that the loss in the opposite direction to the direction in which the radiation is to be radiated can be more strongly radiated in the desired direction.

The separators 1720 and 1725 illustrated in FIGS. 12A to 12B are metal plates having a predetermined area, and are provided on one branch 1720 on horizontal branches and one point 1725 on vertical branches. By installing the separators 1720 and 1725 in the branches in each direction, the magnetic field components that link closer to the branches in each direction are sent farther than the magnetic field components that cross between the ends of the branches in each direction. On the other hand, in the absence of the separator, there is a magnetic field component that links close to the branches among the magnetic field components that link between the ends of the branches in a specific direction. However, in the presence of separators, since magnetic field components cannot pass through the separators, magnetic field components close to the branches can bypass the separator and radiate farther than without the separator. Accordingly, the magnetic field may be evenly distributed in the wireless power transmission area and may have a wider transmission area.

Although the separator has been described as being installed in one of the branches in the horizontal direction and one in the vertical direction, but not necessarily limited to this, if the branches in a particular direction increases, it may increase accordingly.

On the other hand, the reflector and the separator according to each embodiment of the present invention can be equally applied to the wireless power receiver as well as the wireless power transmitter, through which can cause the same effect.

FIG. 13 is a diagram schematically illustrating a case in which a power receiving device according to an embodiment of the present invention is mounted on a main body 1800 of a mobile terminal.

As shown in FIG. 13, the power receiving apparatus according to the exemplary embodiment of the present invention includes a metal shield plate 1810, a receiving core 1820, and a receiving cable 1830.

The metal shield plate 1810 may be an iron plate, aluminum, or the like as a metal material through which current may flow, but the present invention is not limited thereto.

The receiving core 1820 is an elongated rod-shaped body portion 1821 disposed on one side of the metal shielding plate 1810 and substantially parallel to the metal shielding plate 1810, and metal shielding at both ends of the body portion 1821, respectively. Further including at least one protrusion (1822) protruding in the left and right direction at an angle with the longitudinal direction of the body portion 1821 parallel to the plate 1810.

The protrusions 1822 may be provided at both ends of the body portion 1821. Each protrusion 1822 may be embodied in a form symmetrical to the longitudinal direction of the body portion 1821 and protrude in two directions. In this case, the entire receiving core 1820 has a shape of 'I'. By providing the protruding portion 1822 as described above, the effective cross-sectional area of the receiving core 1820 in the horizontal direction can be widened to increase the area for receiving the magnetic flux.

The cross section of the body portion 1821 may be implemented in a rectangular, square or circular shape, and the body portion 1821 may have the same cross-sectional area so that the shape of the cross section is circular so that the body portion 1821 may be cylindrical. Since the internal resistance of the cable can be minimized compared to the cross-sectional area, the power reception efficiency is the best. This will be described in detail with reference to FIGS. 22A and 22B.

Receive cable 1830 is wound around receive core 1820. In addition, the receiving cable 1830 may be evenly wound around the pillar portion of the trunk portion 1821, concentrated and wound around a central portion of the trunk portion 1821, or both ends of the pillar portion of the trunk portion 1821. It can also be wound around each adjacent part of.

In FIG. 13, only the shape in which the receiving cable 1830 is wound around the torso 1821 is illustrated. Since the induction electromotive force generated in the receiving cable 1830 is stored in a battery or used as a power source, it is well known. In FIG. 13, the drawings and detailed description thereof are omitted.

As shown in FIG. 13, the metal shield plate 1810 is disposed toward the inside of the main body 1800 of the mobile terminal, and the receiving core 1820 is disposed toward the outside of the main body 1800 of the mobile terminal.

As shown in FIG. 13, the magnetic field affecting the human body by using a thin receiving core 1820 and a metal shielding plate 1810 on the back of the main body 1800 of the mobile terminal is ICNIRP guidelines (270 mG or less). To satisfy. Here, the metal shield plate 1810 absorbs a portion of the magnetic field generated by the induced current generated in the receiving cable 1830 to prevent the magnetic field from passing to the opposite side of the receiving core 1820. That is, in the metal shield plate 1810, when the magnetic field generated by the induced current generated in the receiving cable 1830 is incident on the metal shield plate 1810, the eddy current is generated so that the magnetic field is generated in the direction in which the incident magnetic field is attenuated. Occurs. Therefore, the magnetic field generated by the receiving cable 1830 is shielded by the magnetic field generated by the eddy current.

The metal shield plate 1810 performs the same role as the reflector plate 1220 of the wireless power transmission apparatus according to the fourth embodiment of the present invention shown in FIG. 7, and the second plate of the present invention shown in FIGS. 3A and 3B. It can be applied to a wireless power transmitter installed indoors according to an embodiment. For example, the metal shield plate 1810 is positioned at one side of the rod-shaped core 810 at a predetermined distance from the rod-shaped core 810.

The receiver core 1820 may receive a magnetic field having substantially the same level as the case where the cylindrical body 1821 uses an cylindrical shape even if the pillar is not cylindrical. In other words, the magnetic flux generated by the power transmission device (not shown) is greatly reduced while the volume and weight of the receiving device are greatly reduced, and the magnetic flux that is connected to the receiving cable 1830 wound on the torso portion 1821 of the receiving core 1820 is effectively increased. Can be.

FIG. 14A illustrates a case in which the auxiliary shielding plate is additionally included in the power receiving apparatus according to the embodiment of the present invention.

As shown in FIG. 14A, the auxiliary shield plate 1840 is disposed in parallel with the metal shield plate 1810 in a direction opposite to the receiving core 1820 based on the metal shield plate 1810. Can be. In addition, the auxiliary core 1850 may be further inserted between the metal shielding plate 1810 and the auxiliary shielding plate 1840. Here, the thickness of the auxiliary core 1850 is implemented to be thinner than the thickness of the receiving core 1820 to minimize the thickness of the power receiving apparatus according to an embodiment of the present invention.

FIG. 14B is a diagram conceptually showing how the magnetic field is shielded.

As shown in FIG. 14B, a strong magnetic field is induced in the outward direction of the I-type receiving core 1820, but the magnetic field in the direction of the metal shielding plate 1810 is shielded in the receiving core 1820. Some of the magnetic field that passes through the unshielded magnetic field of the magnetic shield plate 1810 is absorbed by the auxiliary core 1850, and the magnetic field that is not absorbed by the auxiliary core 1850 is shielded by the auxiliary shield plate 1840. Therefore, the magnetic field directed to the human body is minimized. In this way, the magnetic field is not induced in the direction opposite to the I-shaped core (the smartphone has the liquid crystal in the opposite direction) toward the thin auxiliary core 1850 and the shield plates 1810 and 1840. It is not harmful.

Meanwhile, in the present exemplary embodiment, the auxiliary core 1850 and the auxiliary shielding plate 1840 are assumed to be one each, but a plurality of pairs of the auxiliary core 1850 and the auxiliary shielding plate 1840 may be sequentially disposed. For example, a second auxiliary shield (not shown) is positioned adjacent to the auxiliary shield plate 1840 and a second auxiliary core (not shown) is provided between the auxiliary shield plate 1840 and the second auxiliary shield plate (not shown). ) May be arranged.

The voltage V ₂ induced on the receiving cable 1830 side is the number of turns N ₂ of the receiving cable 1830, each operating frequency ω _s , and the magnetic flux Φ _{1 that} is interlinked from the power transmission device as shown in Equation ₁ . Proportional to

FIG. 15 is a diagram illustrating a case where shielding circuits 1920, 1930, and 1940 are added to a power receiver according to an embodiment of the present invention.

As shown in FIG. 15, the power receiving device according to an embodiment of the present invention may further include a first shielding loop circuit 1920 and a second shielding loop circuit 1930 parallel to the metal shield plate 1810. have. One end of the trunk portion 1821 of the receiving core 1820 is positioned at the center of the first shielding loop circuit 1920, and the trunk portion 1821 of the reception core 1820 is located at the center of the second shielding loop circuit 1930. The other end is located. As described above, the shielding loop circuit disposed in the form of surrounding both ends of the body portion 1821 serves to minimize the degree of magnetic flux generated at both ends of the body portion 1821 toward the main body 1800 of the mobile terminal. The first shielded loop circuit 1920 and the second shielded loop circuit 1930 may be used together with the metal shield plate 1810, but in some cases, the first shielded loop circuit 1920 and the metal shield plate 1810 may be omitted. Only the second shield loop circuit 1930 may be used for magnetic field shielding purposes.

There may be a plurality of first shielded loop circuits 1920 and second shielded loop circuits 1930, respectively. For example, there may be another one or more auxiliary shielded loop circuits disposed in the first shielded loop circuit 1920 so as not to cross each other.

The first shielded loop circuit 1920 and the second shielded loop circuit 1930 intersect with the body portion 1821 of the receiving core 1820, and as shown in FIG. 15, the intersected portion is a metal shield plate 1810. And a torso 1821 of the receiving core 1820.

Inside at least one of the first shielded loop circuit 1920 and the second shielded loop circuit 1930, a portion of the body 1821 and the protrusion 1822 intersect the body 1821 and the protrusion 1822. Third shielding loops (1940, 1950) surrounding the connection portion of the may further include.

The third shielding loop circuits 1940 and 1950 are further provided inside the first shielding loop circuit 1920 and the second shielding loop circuit 1930, respectively, so that magnetic fluxes generated at both ends of the body portion 1821 may be reduced. The amount of attenuation toward the main body 1800 is increased. Therefore, the magnetic field attenuation effect toward the main body 1800 of the mobile phone becomes greater.

On the other hand, although the first shielding loop circuit 1920 and the second shielding loop circuit 1930 may be disposed on the metal shielding plate 1810, when there is no metal shielding plate 1810, the planar member 1910 may be formed. It may be disposed on one side. In this case, the first shielding loop circuit 1920 and the trunk portion which wrap one end of the trunk portion 1821 side by side in the longitudinal direction of the trunk portion 1821 and are located between the planar member 1910 and the trunk portion 1821. A second shielding loop circuit 1930 is disposed between the planar member 1910 and the trunk portion 1821 and surrounding the other end of the trunk portion 1821 side by side in the longitudinal direction of the 1821.

The first shielded loop circuit 1920 and the second shielded loop circuit 1930 may be applied to a wireless power transmitter installed indoors according to the second embodiment of the present invention illustrated in FIGS. 3A and 3B. For example, the first shielding loop circuit 1920 and the second shielding loop circuit 1930 may surround one end and the other end of the bar core 810 and may be positioned at predetermined intervals from the bar core 810. .

FIG. 16 is a diagram illustrating a case where a fourth shielded loop circuit 1960 that surrounds an end of the protrusion 1822 is added in the power receiving device according to an embodiment of the present invention.

As shown in FIG. 16, there are a plurality of shielding loop circuits surrounding any one end of the body portion 1821, and at least one shielding circuit among the plurality of shielding loop circuits includes a protrusion 1822 and a body portion 1821. ) And the other part of the plurality of shielding loop circuits surround the connecting portion of the body portion 1821 and the protrusion 1822, and the other shielding circuit is present at the position surrounding the protrusion 1822 while crossing the protrusion 1822. For example, a plurality of shielding circuits used at one end of the body portion 1821 include a first shielding loop circuit 1920, a third shielding loop circuit 1940, and a fourth shielding loop circuit 1960. In this case, the first shielding loop circuit 1920 has a shape surrounding the entire protrusion 1822 and one end of the body portion 1821. The third shielded loop circuit 1940 and the fourth shielded loop circuit 1960 are present at positions spaced apart from each other without overlapping inside the first shielded loop circuit 1920. The third shielded loop circuit 1940 is formed to surround the connecting portion of the body portion 1821 and the protrusion 1822, and the fourth shielded loop circuit 1960 is formed to surround the protrusion 1822.

The third shielded loop circuit 1940 is disposed at a position intersecting with the trunk portion 1821 and the protrusion 1822, respectively, and the fourth shielded loop circuit 1960 does not intersect with the trunk portion 1821 and the protrusion 1822. ) Is arranged to intersect.

As shown in FIG. 16, the magnetic field attenuation effect may be maximized by adding an auxiliary circuit having a shape surrounding the end of the body portion 1821.

17A is a diagram illustrating various shapes of a cross section of the torso 1821 in the receiving core 1820.

As shown in FIG. 17A, the cross-sectional shape of the body portion 1821 may be implemented as a cube (a) or a circle (b).

It is important to select the metal shield 1810, the receiving core 1820, the auxiliary shield 1840, the auxiliary core 1850, and the like so as to have an appropriate thickness so as not to be saturated by the magnetic field. Therefore, the thickness of the receiving core 1820, which generates a large magnetic field, is thicker than the thickness of the auxiliary core 1850. In addition, in the case of the shielding plate, the auxiliary shielding plate 1840 may be implemented to be smaller than the thickness of the metal shielding plate 1810 since the amount of magnetic field incident is small. Thus, by determining the thickness of each component it is possible to minimize the thickness of the power receiving apparatus according to the embodiment of the present invention. For example, when the cross-sectional area and the length of the circumference are A1 and R1 in the case of a cuboid, the cross-sectional area and the circumference in the case of a cube are A2 and R2, and the lengths of the cross-sectional area and the circumference in the case of a circle are A3 and R3. If A1 = A2 = A3, R1> R2> R3 holds.

In the case of FIG. 17A, the length of the receiving cable 1830 wound around the receiving core 1820 while keeping the cross-sectional area of the receiving core 1820 constant so that the magnetic field has a minimum amount of cores without saturation is as small as possible. There is a need. Therefore, minimizing the length of the winding around the receiving core 1820 of the predetermined area minimizes the length of the receiving cable 1830 winding around the receiving core 1820. Therefore, since the length of the receiving cable 1830 is minimized, the internal resistance of the receiving cable 1830 is minimized while receiving power of the same size in the power receiving device, thereby enabling the most efficient power transfer.

In FIG. 17A, if the body portion 1821 of the same cross-sectional area (A) has any shape in the core (magnetic flux Φ _total = B _max * A is constant, B _max is magnetic flux density) per turn of winding wound around the core Explain if length is minimized. In this case, the resistance R _ℓ of the winding wound to the core to produce a constant output is proportional to the length per turn of the winding wound to the core, so minimizing the length per turn of the winding is important for high efficiency winding design.

As shown in FIG. 17A (a), when the cross section of the trunk portion 1821 has a rectangular shape (including a square), the following equation 2 is established for the length l _c per turn in the trunk portion 1821.

However, in Equation 2, k is a proportional constant.

In Equation 2, the length of the length ℓ _c per turn has a graph as shown in FIG. 17B.

As shown in FIG. 17B, when k = 1, the length of L _c becomes the minimum, and l _{co, which} is the length of L _c at this time, may be represented by Equation 3 below.

When the cross section of the trunk portion 1821 is circular, as shown in FIG. 17A (b), the following equation (4) holds for the length l' _c per turn in the trunk portion 1821.

Therefore, equation (5) holds true from equation (4).

From Equation 5, it can be seen that the case where the cross-sectional shape of the body portion 1821 is circular is about 11% smaller than that of the square.

On the other hand, the cross-sectional shape of the body portion 1821 can be applied to the case of n-square, such as hexagon, octagon, etc., may be used in combination of a rectangle and a circle as shown in FIG. For example, as shown in FIG. 17C, the cross-sectional shape of the body portion 1821 is square, but the corner portion is rounded so that both of the advantages of a square with a small thickness and a circular feature with a small length per turn can be taken. It may be.

FIG. 18A is a diagram illustrating a case where a part of a human body approaches a power receiver according to an embodiment of the present invention, and FIG. 23B is a diagram illustrating an equivalent circuit for the entire receiver circuit in the power receiver, and FIG. 23C. Is a diagram showing an example of a decrease in reception power due to a change in the resonance point of the reception circuit.

As shown in FIG. 18A, when a part of the human body 2010 (for example, a user's hand) approaches the power receiving apparatus, the receiving cable 1830 is changed as the inductance L ₂ of the receiving cable 1830 is changed. In the circuit including the resonance point due to L ₂ and C ₂ is changed, so that the amount of the reception current I ₂ is automatically reduced. For example, when the operating frequency of the power transmission device (not shown) is ω _r1 , the power reception operation is performed by setting the capacitances of L ₂ and C ₂ such that the resonance point of the reception circuit is ω _r1 . However, when the human body approaches close (for example, when the user's hand is placed on the back of the smartphone to make a call), the inductance of the receiving circuit is reduced by the human body's interference, so the resonance point of the receiving circuit is ω _r2 . It becomes bigger. Therefore, as I ₂ decreases and the induced electromotive force ratio V _o / V _i from A ₁ to A ₂ decreases, the magnetic flux in the vicinity of the power receiver decreases and satisfies the ICNIRP guidelines. That is, when the user's hand or other human body comes in contact with the smart phone, the power receiving device does not charge, and when the power receiving device is far from the human body, the power receiving device automatically starts charging.

Meanwhile, in the case of the entire receiving circuit in FIG. 18B, the LC parallel resonator is exemplified. However, the configuration of the receiving circuit in the LC series resonance mode is also possible.

Meanwhile, the voltage Vo generated in FIG. 18B is added to the main body 1800 of the mobile terminal by adding a converter (not shown) that receives the voltage V _o and increases or decreases the voltage level so as to be suitable for use in a mobile terminal. The provided battery (not shown) may be charged.

As described above, the terminal according to an embodiment of the present invention, as shown in Figure 13, the power receiving apparatus according to an embodiment of the present invention is disposed on one side of the main body 1800 of the mobile terminal, The metal shield plate 1810 faces the main body 1800 of the mobile terminal and the receiving core 1820 faces toward the outside of the main body 1800 of the mobile terminal.

19 is a diagram illustrating a wireless power transmission and reception apparatus according to an embodiment of the present invention.

Referring to FIG. 19, a wireless power transmitter and receiver according to an embodiment of the present invention includes a core part 2110, first winding parts 2120a to 2120f, and second winding parts 2130a to 2130f.

The core part 2110 includes a plurality of cores 2115 having a length longer than a width or a thickness, and arranges multiple cores in a grid structure. Multiple cores may be arranged in a lattice structure to be used as the core part 2110, and multiple cores may be used as the core part 2110 by integrally manufacturing the lattice structure. In FIG. 19, for convenience, the lengths of the cores arranged in the horizontal direction of the core portion and the lengths of the cores arranged in the longitudinal direction of the core portion are set equal to l ₀ , but the present invention is not necessarily limited thereto. The cores may have different lengths. Further, in FIG. 19, the number of cores arranged in the horizontal direction of the core part and the number of cores arranged in the longitudinal direction of the core part are arranged to be the same, but are not limited thereto. The numbers can be different.

A strong magnetic field must be created for long distance power transmission. However, the winding itself is a problem because a large magnetoresistance occurs in the winding inner space. To reduce this magnetoresistance, a long core is inserted inside the winding. The winding with the core inserted increases the magnetic flux density through a decrease in the magnetoresistance compared to the winding in which the core is inserted. In addition, in the case of a loop type transmission coil module having a structure of a general transmission coil module, the magnetic field is inversely proportional to the cube R ³ of the distance R with respect to the x-axis direction. However, the magnetic field generated by the linear transmitting coil module 22120 is inversely proportional to the distance R to the square of the distance R ² with respect to the x-axis direction. Accordingly, the core portion 2110 includes a plurality of cores 2115 that are longer than a width or a thickness, rather than a loop shape.

In addition, the wireless power receiver receives a magnetic field and induces power (current) using the received magnetic field. However, as described above, since the winding itself generates a large magnetoresistance in the winding inner space, the efficiency of inducing power is reduced. Long cores are inserted inside the windings to reduce this magnetoresistance. The inserted core reduces the magnetoresistance of the inner space of the winding and can receive a larger amount of magnetic field compared to the same external magnetic flux environment.

The first winding parts 2120a to 2120f and the second winding parts 2130a to 2130f are spirally wound on the cores arranged in the horizontal direction and the core arranged in the longitudinal direction, respectively. In this case, the first winding parts 2120a to 2120f and the second winding parts 2130a to 2130f may be wound around portions of the core except for a portion in which the core present in the core portion contacts another core.

20 illustrates a normalized magnetic field emitted by a wireless power transmitter according to an embodiment of the present invention.

In FIG. 19, the core part around which the first winding part and the second winding part are wound radiates a magnetic field in the z-axis direction from one end of each core to the other end. In each core radiating a magnetic field, AC power having a phase difference of 90 degrees is supplied to the first winding portion and the second winding portion. For example, suppose that an AC power supply as shown in Equation 6 below is supplied to the first winding unit, an AC power supply as shown in Equation 7 below is supplied to the second winding unit.

As can be seen with reference to Equations 6 and 7 above, the AC power applied to the first and second windings has the same size but has a phase difference of 90 degrees. Since the AC power having the phase difference of 90 degrees is applied to the first winding portion and the second winding portion, respectively, the magnetic field generated in the core portion in which the first winding portion or the second winding portion is wound also has a phase difference of 90 degrees. The magnetic field generated in the core portion around which the first winding portion or the second winding portion is wound has a 90 degree phase difference, and the core portion around which the first winding portion or the second winding portion is wound is arranged in a lattice structure so that the phase difference is physically 90 degrees. Since the magnetic field radiated by the wireless power transmitter, that is, the magnetic field radiated by the core wound around the first winding part or the second winding part, has a uniform magnetic field in a certain area as shown in FIG. 19. An omnidirectional rotor field with magnitude occurs.

21 is a diagram illustrating a state in which a wireless power receiver receives a magnetic field according to an embodiment of the present invention.

As described with reference to FIG. 19, the wireless power receiver 2210 includes a core part 2240 having multiple cores arranged in a lattice structure, and first winding parts 2250a to 2250f and a second winding wound around each multiple core. Windings 2260a to 2260f. Accordingly, when the wireless power transmitter 2210 receives the magnetic field, the wireless power transmitter 2210 may receive both the magnetic flux in the x-axis direction and the magnetic flux in the y-axis direction. Since the wireless power receiver 2210 can receive both the magnetic flux in the x-axis direction and the magnetic flux in the y-axis direction, three power sources are connected in series between terminal a and terminal b or terminal c and terminal d respectively. Have the same structure.

In addition, even if a single core receives the magnetic flux, there is a magnetic flux leaking to the surrounding air layer, the wireless power receiver according to an embodiment of the present invention to minimize the leakage magnetic flux component to increase the reception efficiency of the magnetic flux . The wireless power receiver arranges multiple cores in a lattice structure so that magnetic flux flows to a core other than the surrounding air layer. More specifically, for example, when the wing cores disposed in the x-axis direction ( cores 2220a and 2220c disposed at the outermost of the multiple cores disposed in the x-axis direction) receive the magnetic flux, the received magnetic flux is The magnetic flux flowing to the cores 2230a to 2230c disposed in the y-axis direction in contact with each other is minimized.

22 is a diagram illustrating an equivalent magnetic circuit model of a wireless power receiver according to an embodiment of the present invention.

The equivalent magnetic circuit shown in FIG. 22 is an equivalent magnetic circuit for the wireless power receiver shown in FIG. 21 in either the x-axis direction or the y-axis direction, and the number of cores arranged in the x-axis or y-axis direction. 21 corresponds to the equivalent magnetic circuit of the wireless power receiver having m arranged without being fixed to three as shown in FIG. 21.

The magnetic flux flowing to the core in the wireless power receiver is as follows.

Φ ₁ means magnetic flux received by the wing cores 2220a and 2220c disposed in the x-axis direction or the wing cores 2230a and 2230c disposed in the y-axis direction. R _a is the magnetoresistance of the atmosphere, R _c1 to R _cm is the magnetoresistance of each core, Φ ₂ is the magnetic flux flowing to the core in the wireless power receiver. The magnetic flux received by the wing core is divided into atmospheric magnetic resistance and the composite resistance of the magnetic resistance of each core. At this time, since the magnetic resistance of each core is the same size, the following equation is satisfied. . Referring to Equation 8, the magnetic flux Φ ₂ flowing to the core in the wireless power receiver increases as the number of cores arranged in the x-axis direction or the y-axis direction increases.

Therefore, the number of cores to be arranged in the x-axis direction or the y-axis direction can be selected by the user in consideration of the usage amount of the cores and the reception efficiency of the magnetic flux.

As described above, the wireless power transceiver according to an embodiment of the present invention radiates a magnetic field in a space in which a magnetic field is to be radiated using a core part disposed in a lattice structure and a winding part wound around the core part, and a radiated magnetic field Receive When the wireless power transceiver transmits a magnetic field in a space and receives a magnetic field radiated into the space, the wireless power transceiver according to an embodiment of the present invention occupies a predetermined volume in a two-dimensional space. It is possible to realize an omni-directional wireless charging environment in a three-dimensional space without taking up a lot of volume.

23A and 23B are diagrams illustrating respective wireless power transmitters and receivers having a difference in whether a metal plate is located according to an embodiment of the present invention.

Referring to FIG. 23A, the metal plate 2310 is made of a high conductivity material such as an aluminum plate to shield a magnetic field emitted from the wireless power transceiver. An eddy current is generated on the surface of the metal plate absorbing the magnetic field radiated from the wireless power transceiver, thereby generating a magnetic field in a direction opposite to the direction of the magnetic field incident from the metal plate 2310 into the metal plate 2310. The metal plate 2310 cancels the magnetic field incident on the metal plate 2310 by the magnetic field in the opposite direction, and shields the magnetic field radiated from the wireless power transceiver.

When a metal plate is used in the wireless power transmitter, the wireless power transmitter is installed in a direction opposite to the direction in which the magnetic field is to be radiated. Since the metal plate shields the magnetic field incident on the metal plate as described above, the core portion 2110 of the wireless power transmitter emits a magnetic field to the atmosphere in the z-axis direction. Therefore, the wireless power transmitter in which the metal plate is located at one side emits a magnetic field only to the opposite side where the metal plate is located. Since the wireless power transmitter in which the metal plate is located emits a magnetic field only to the opposite side where the metal plate is located, the metal plate produces an effect as if it is a reflector reflecting the magnetic field emitted from the wireless power transmitter. As such, the metal plate is positioned to reflect the magnetic field to the opposite side where the metal plate is located, so that the wireless power transmitter emits a stronger magnetic field in a direction to radiate the magnetic field. In addition, when the wireless power transmitter is installed on the ceiling of each floor of a building such as an apartment or a shopping mall, if there is no metal plate, an unwanted magnetic field may reach the upper floor of the space where the wireless power transmitter wants to radiate the magnetic field. Therefore, it can not be excluded that people upstairs are adversely affected by the magnetic field. Therefore, by placing a metal plate on one side of the wireless power transmitter, the wireless power transmitter emits a magnetic field only in a space in which the magnetic field is to be radiated, and in a space such as an apartment or a shopping mall where the magnetic field is not desired to be radiated. Upper layer) to prevent the magnetic field from radiating.

When the metal plate is used in the wireless power receiver, the magnetic plate is installed in a direction to shield the magnetic field radiated from the wireless power receiver. The magnetic field is also radiated from the wireless power receiver. When a user attempts to use equipment such as a terminal including the wireless power receiver, when the user's body approaches an arbitrary device, the magnetic field is radiated from the wireless power receiver. It may be adversely affected. Therefore, by installing a metal plate on one side of the wireless power receiver to shield the magnetic field radiated from the wireless power receiver, it is possible to minimize the bad effect of the magnetic field to the user. In addition, since the magnetic field is radiated from the wireless power receiver, various circuits included in the electronic devices that exist in the vicinity of the wireless power receiver may malfunction due to magnetic field interference caused by the magnetic field radiated from the wireless power receiver. Since the metal plate shields a magnetic field radiated from the wireless power receiver, the metal plate also serves to block magnetic field interference on other electronic devices in the vicinity.

The metal plate is not limited in size, but when the metal plate has a size larger than that of the core of the wireless power transceiver, the wireless power transceiver shields the magnetic field radiated in a direction opposite to the direction in which the wireless power transceiver is to radiate the magnetic field. Gets better.

On the other hand, when the metal plate is not located in the wireless power transceiver as shown in Figure 23b the core portion 2110 radiates a magnetic field to the atmosphere in all directions of the z-axis.

Effects caused by such a difference, in particular, effects occurring in the wireless power transmitter will be described with reference to FIGS. 24 to 26.

24A and 24B illustrate equivalent magnetic circuit models of respective wireless power transmitters having a difference in whether a metal plate is located according to an embodiment of the present invention.

The magnetic flux Φ _c in the core of the wireless power transmitter having the metal plate illustrated in FIG. 24A is obtained as follows.

NI _i refers to the magnetomotive force generated from the wireless power transmitter, R _C is the magnetoresistance of the core portion, R _a is the magnetoresistance of the atmosphere, R _r is the magnetoresistance of the metal plate. The magnetic flux Φ _c inside the core part is obtained by dividing the magnetic force generated by the wireless power transmitter by the combined resistance of the magnet part of the core part, the magnetoresistance of the air and the magnetoresistance of the metal plate. At this time, since the metal plate is a material having high conductivity and has a very large value compared to the magnetic resistance of the atmosphere, the combined resistance of the magnetic resistance of the atmosphere and the magnetic resistance of the metal plate approximates the value of the magnetic resistance of the atmosphere. Therefore, the final magnetic flux Φ _c in the core part is approximated by dividing the magnetic force generated by the wireless power transmitter by the sum of the magnet resistance of the core part and the magnetoresistance of the air.

In addition, the magnetic flux Φ _a emitted by the wireless power transmitter in which the metal plate is located is as follows.

The magnetic flux emitted by the wireless power transmitter is the same as that of the magnetic flux inside the core part by the magnetic resistance of the metal plate among the magnetic resistance of the atmosphere and the magnetic resistance of the metal plate. At this time, as described above, since the magnetoresistance of the metal plate has a much larger value than the magnetoresistance of the atmosphere, the magnetoresistance of the metal plate can be approximated to the magnetoresistance of the metal plate even when the magnetoresistance of the metal plate is combined with the magnetoresistance of the atmosphere. As a result, the magnetic resistance of the portion where the metal plate is located becomes relatively large, and most of the magnetic flux inside the core portion is radiated to the atmosphere (the direction in which the wireless power transmitter intends to radiate), and in the direction where the metal plate is located. Magnetic flux is not emitted.

On the other hand, when the magnetic flux Φ _c 'inside the core of the wireless power transmitter without the metal plate shown in Figure 24b is obtained as follows.

The magnetic flux Φ _c 'inside the core part corresponds to the magnetic force generated from the wireless power transmitter divided by the sum of the magnetoresistance of the core part and the half of the magnetoresistance of the atmosphere. When comparing the wireless power transmitter in which the metal plate shown in FIG. 24B is not located with the wireless power transmitter in which the metal plate shown in FIG. 24A is located, the magnetic flux inside the core portion is the wireless power in which the metal plate shown in FIG. 24B is not located. The transmitter has a larger value.

In addition, the magnetic flux Φ _a 'emitted by the wireless power transmitter in which the metal plate is located is as follows.

Since the magnetic flux Φ _c 'inside the core part is divided by the same magnetic resistance of the atmosphere, the magnetic flux Φ _a ' emitted by the wireless power transmitter becomes half the magnetic flux inside the core part. Therefore, the magnetic flux Φ _a 'radiated by the wireless power transmitter has _a value obtained by dividing the magnetic force by the sum of the magnetoresistance of the core portion twice and the magnetoresistance of the atmosphere.

When comparing the wireless power transmitter in which the metal plate shown in FIG. 24B is not located with the wireless power transmitter in which the metal plate shown in FIG. 24A is located, the wireless power transmitter in which the metal plate is located is a wireless power transmitter in which the metal plate is not located. Compared with the small magnetic flux inside the core, the magnetic flux radiated by the wireless power transmitter has a large value.

FIG. 25A illustrates a normalized magnetic flux density of magnetic flux emitted by a wireless power transmitter without a metal plate at a distance half the width or length of the wireless power transmitter in the z-axis direction. FIG. 25B illustrates a normalized magnetic flux density of magnetic flux emitted by the wireless power transmitter in which the metal plate is positioned at a distance separated by half of the width or the length of the wireless power transmitter in the z-axis direction.

As described above with reference to FIGS. 24A and 24B, in comparison with FIGS. 25A and 25B, the magnetic flux density of the magnetic flux emitted from the wireless power transmitter in which the metal plate shown in FIG. 25B is located is shown in FIG. 25A. The magnetic flux density of the magnetic flux radiated from the wireless power transmitter which is not located increases. In the wireless power transmitter in which the metal plate is located, even if a relatively small amount of magnetic flux is generated inside the core part, since the magnetic plate of the metal plate is located to increase the magnetoresistance of the portion where the metal plate is located, most of the magnetic flux inside the core part is generated. This is because it is transmitted in the opposite direction in which it is located (the direction in which the wireless power transmitter intends to radiate a magnetic field).

FIG. 26 illustrates a change in normalized magnetic flux density within each wireless power transmitter having a difference in whether or not a metal plate is located according to an embodiment of the present invention.

In the core part, hysteresis loss inevitably occurs due to the magnetic flux generated inside the core part. Hysteresis losses can be calculated using the Steinmetz equation, which is given by

P _h is hysteresis loss, C _m and C _T are constants, f is the frequency of magnetic flux change, and B _peak is the maximum value of magnetic flux density inside the core part. In the Steinmetz equation, since q generally corresponds to 3, the hysteresis loss increases in proportion to the third power of the maximum value of the magnetic flux density.

As shown in FIG. 26, it can be seen that the wireless power transmitter in which the metal plate is located has less magnetic flux density generated inside the core than the wireless power transmitter in which the metal plate is not located. The difference in magnetic flux density generated inside the core may be small. However, considering the hysteresis loss is proportional to the third power of the magnetic flux density, the hysteresis loss generated in the wireless power transmitter can be considerably reduced by the metal plate. have.

27 to 30 is a view schematically showing a wireless power transmission device according to an embodiment of the present invention. Wireless power transmission apparatus according to an embodiment of the present invention may be used as a wireless power transmitter or a wireless power receiver according to the embodiment. Meanwhile, FIGS. 27 to 30 illustrate embodiments of the wireless power transmission apparatus that may be implemented in various forms according to the additional installation of the metal plate 3300, the auxiliary windings 3400a and 3400b, and the auxiliary core 3500.

FIG. 27 is a diagram illustrating a first implementation of a wireless power transmitter 3200 according to an embodiment of the present invention. Meanwhile, the first implementation form is the most basic implementation form of the wireless power transmission device 3200.

Referring to FIG. 27, the wireless power transmitter 3200 according to an embodiment of the present invention includes a core 3210 and a winding part 3220.

Core 3210 is a magnetic material used to increase magnetic flux transmission and is implemented in a shape having a predetermined width and length. This core 3210 causes an effect of increasing the magnetic flux density generated by the current flowing through the winding by reducing the magnetic resistance generated in the interior space of the winding wound around the core 3210.

The core 3210 according to the present embodiment may be manufactured using any material including a ferrite material, and the shape of the core 3210 may be implemented in any shape including a quadrangle. Hereinafter, a case in which the core 3210 according to the present embodiment is implemented in the form of a rectangle will be described.

The winding part 3220 may include a first winding 3222 wound on the core 3210 in the longitudinal direction of the core 3210 and a second winding 3224 wound on the core 3210 in the width direction of the core 3210. Include. The first winding 3222 and the second winding 3224 may be implemented with a Litz wire to minimize power loss occurring inside the winding.

The first winding 3222 and the second winding 3224 are wound on the core 3210 in a form perpendicular to each other.

The first winding 3222 and the second winding 3224 respectively receive alternating currents having a predetermined phase difference when the wireless power transmitter 3200 is used as a wireless power transmitter. In this case, the AC current applied to the first winding 3222 and the AC current applied to the second winding 3224 preferably have a phase difference of 90 degrees, but are not necessarily limited thereto. For example, when an alternating current as shown in Equation 14 is supplied to the first winding 3222, an alternating current as shown in Equation 15 is supplied to the second winding 3224.

As described above with reference to Equations 14 and 15, an alternating current applied to the first winding 3222 and the second winding 3224 (hereinafter, referred to as D current and Q current, respectively) will be described. ) Are the same size but have a phase difference of 90 degrees with each other. In this way, since an alternating current having a phase difference of 90 degrees is applied to the first winding 3222 and the second winding 3224, the core 3210 on which the first winding 3222 and the second winding 3224 are wound. The magnetic field generated at also has a phase difference of 90 degrees. In the present embodiment, the magnetic field generated in the core 3210 on which the first winding 3222 and the second winding 3224 are wound has a phase difference of 90 degrees, and the first winding 3222 and the second winding 3224 are As physically arranged to have a phase difference of 90 degrees, the magnetic field emitted by the wireless power transmitter 3200 (a composite magnetic field of the magnetic field caused by the Q current and the Q current) radiates a rotating magnetic field with a constant magnitude. Form. When the wireless power transmitter 3200 according to an embodiment of the present invention is used as a wireless power transmitter due to the rotating magnetic field, a receiver having a two-axis planar structure in the wireless power transmission area may be configured to change power in all directions and angles. 6-freedom capable of receiving wireless power characteristics can be implemented.

On the other hand, when the wireless power transmitter 3200 according to an embodiment of the present invention is used as a wireless power receiver, the first winding 3222 and the second winding 3224 respectively induce magnetic fields generated from the wireless power transmitter. To generate induced electromotive force.

28 is a view showing a second implementation of the wireless power transmission device 3200 according to an embodiment of the present invention.

The wireless power transmission device 3200 according to an embodiment of the present invention may be implemented in a form in which the metal plate 3300 is further provided as a component in the first embodiment of the wireless power transmission device 3200 illustrated in FIG. 27. Can be.

The metal plate 3300 is positioned side by side in the longitudinal direction of the core 3210 on one side of the core 3210, and is positioned at a predetermined distance from the core 3210.

The metal plate 3300 is made of a high conductivity material such as an aluminum plate to serve to shield a magnetic field incident on the metal plate 3300. In this case, the magnetic field shielded by the metal plate 3300 means a magnetic field radiated from the wireless power transmitter 3200 when the wireless power transmitter 3200 is used as a wireless power transmitter, and the wireless power transmitter 3200. ) Is used as a wireless power receiver, it means a magnetic field incident from the wireless power transmitter. On the other hand, the eddy current is generated on the surface of the metal plate 3300 absorbing the magnetic field, through which, the magnetic field is generated in the direction opposite to the direction of the magnetic field incident on the metal plate 3300. The metal plate 3300 cancels and shields the magnetic field incident to the metal plate 3300 by the magnetic field in the opposite direction.

When the metal plate 3300 is used in the wireless power transmitter 3200, the wireless power transmitter 3200 is installed in a direction opposite to the direction in which the magnetic field is to be radiated. Since the metal plate 3300 shields the magnetic field incident to the metal plate 3300 as described above, the wireless power transmission device 3200 in which the metal plate 3300 is located on one side is provided only on the opposite side where the metal plate 3300 is located. Emits a magnetic field Wireless power transmission device 3200 according to an embodiment of the present invention by installing the metal plate 3300 on one side of the core 3210, for example, the direction in which no magnetic field is used to reflect the magnetic field to the opposite side where the metal plate 3300 is located. This prevents magnetic fields from leaking in unwanted directions. In addition, since the magnetic field radiated by the metal plate 3300 mainly flows into the core 3210, the magnetic field inside the core 3210 is canceled, so that the loss of the core 3210 may be reduced to increase power transmission efficiency.

FIG. 29 is a diagram illustrating a third implementation of a wireless power transmission device 3200 according to an embodiment of the present invention.

The wireless power transmission device 3200 according to an embodiment of the present invention further includes at least one auxiliary winding 3400a and 3400b as a component in the first embodiment of the wireless power transmission device 3200 shown in FIG. 27. It may be implemented in the form having.

The auxiliary windings 3400a and 3400b are positioned at one side of the core 3210 at a predetermined distance from the core 3210. The auxiliary windings 3400a and 3400b play the same role as the metal plate 3300 of FIG. 28, but have an effect of reducing the amount of power consumed when using the metal plate 3300. The auxiliary windings 3400a and 3400b do not require a separate driving circuit, and a closed loop type Litz winding may be used to reduce power consumption.

The auxiliary windings 3400a and 3400b are electrically connected to two terminals at both ends thereof, and are connected in series with the auxiliary windings 3400a and 3400b to increase the magnitude of the magnetic field generated by the auxiliary windings 3400a and 3400b. A (variable) capacitor can be further provided. The auxiliary windings 3400a and 3400b may be formed by extending the windings wound on the core 3210 according to an embodiment.

Meanwhile, in FIG. 29, a plurality of auxiliary windings are provided, and each of the auxiliary windings 3400a and 3400b is positioned at both ends of the lower side of the core 3210, but is not necessarily limited thereto. For example, the auxiliary windings 3400a and 3400b are installed in a direction opposite to the direction in which the wireless power transmitter 3200 is intended to radiate a magnetic field to block a magnetic field leaking in an undesired direction (behind the auxiliary winding). It can be implemented in any form as long as it can offset the loss of core.

30 is a view showing a fourth embodiment of the wireless power transmission device 3200 according to an embodiment of the present invention.

The wireless power transmitter 3200 according to an embodiment of the present invention may include at least one auxiliary winding 3400a and 3400b and an auxiliary core 3500 in the first embodiment of the wireless power transmitter 3200 shown in FIG. 27. It may be implemented in a form further comprising as a component.

As shown in FIG. 29, the auxiliary windings 3400a and 3400b are positioned at one side of the core 3210 at predetermined intervals, and serve the same role as the metal plate 3300 of FIG. 28.

The auxiliary cores 3500 are positioned side by side in the longitudinal direction of the core 3210 on one side of the auxiliary windings 3400a and 3400b and are spaced apart from the auxiliary windings 3400a and 3400b at predetermined intervals. The auxiliary core 3500 serves to increase the strength of the magnetic field generated from the auxiliary windings 3400a and 3400b so that the magnetic field can be more strongly applied to the power transmission region. In addition, the magnetic flux inside the core 3210 may be more canceled out by the auxiliary core 3500 to reduce the loss of the core 3210. In addition, the auxiliary core 3500 has an effect of shielding a magnetic field leaking behind the auxiliary core 3500. Meanwhile, in FIG. 30, the wireless power transmitter 3200 according to an embodiment of the present invention includes at least one auxiliary winding 3400a and 3400b in the first embodiment of the wireless power transmitter 3200 shown in FIG. 27. Although illustrated as being implemented as an additional form having the auxiliary core 3500 as a component, it is also possible to implement in the form of additionally provided only the auxiliary core 3500 as a component.

31 is a view showing a modular model of the wireless power transmission device according to an embodiment of the present invention. Meanwhile, the modular model of the wireless power transmission device is implemented in a form in which the wireless power transmission device according to an embodiment of the present invention is regularly arranged as a unit module in order to radiate a magnetic field in a large space. Hereinafter, in FIG. 36, the wireless power transmission apparatus according to an embodiment of the present invention will be described by illustrating a modular model when the wireless power transmission apparatus is implemented as a wireless power transmitter. However, the present invention is not necessarily limited thereto. Even when implemented as the same or similar modular model can be applied.

As shown in FIG. 31, the modular model of the wireless power transmission device according to an embodiment of the present invention (hereinafter, will be described as a modular wireless power transmission device) may include a plurality of coils 3610, horizontally and vertically, respectively. 3620, inverter 3630, and auxiliary circuit 3640. On the other hand, the inverter 3630 is provided only when the modular wireless power transmitter 3600 is used as a wireless power transmitter.

Each of the coils 3610 and 3620 constituting the modular wireless power transmitter 3600 is regularly arranged horizontally and vertically. At this time, the horizontal and vertical means a direction orthogonal to each other to form a two-dimensional form.

Each of the coils 3610 and 3620 basically has a first implementation of the wireless power transmission device 3200 illustrated in FIG. 27 as a basic form. Meanwhile, although FIG. 31 illustrates windings only in some coils for convenience, windings are provided in substantially all coils.

The first winding provided in any one coil of the plurality of coils is connected to the first winding provided in each coil whose both ends are located at both sides of one coil in the horizontal direction.

In addition, the second winding provided in any one coil of the plurality of coils is connected to the second winding provided in each coil, both ends of which are located on both sides of any one of the coils in the longitudinal direction.

In another embodiment, each of the coils 3610 and 3620 is based on the first implementation of the wireless power transfer device 3200 shown in FIG. 27, but for more efficient connection between each of the coils 3610 and 3620. It can be implemented in two types. Hereinafter, in FIG. 31, a case in which each of the coils 3610 and 3620 constituting the modular wireless power transmission device 3600 are implemented in two types will be described.

The coils 3610 and 3620 constituting the modular wireless power transmission device 3600 are divided into a first type coil 3610 and a second type coil 3620 according to the shape of the winding and the winding method, respectively.

The first type coil 3610 includes a core 3612 and a first winding 3614 and a second winding 3616 wound around the core 3612, the first winding 3614 and the second winding 3616. Are each implemented as two separate windings.

The first winding 3614 is divided into two windings 3614a and 3614b, each winding 3614a and 3614b being wound in the longitudinal direction of the core 3612. At this time, each of the windings 3614a and 3614b are wound in the same direction, but the first winding 3614a positioned above the center of the core 3612 is wound up to the center of the core 3612. The first winding 3614b provided below the center of the core 3612 is wound up to the lower end of the core 3612.

The second winding 3616 is divided into two windings 3616a and 3616b, and each of the windings 3616a and 3616b is wound in the width direction of the core 3612. At this time, each of the windings 3616a and 3616b is wound in the same direction, but the second winding 3616a provided on the left side with respect to the center of the core 3612 is wound up to the center from the left side of the core 3612. The second winding 3616b provided on the right side with respect to the center of the core 3612 is wound up to the right side starting from the center of the core 3612.

The second type coil 3620 includes a core 3622 and a first winding 3624 and a second winding 3826 wound around the core 3622, with the first winding 3624 and the second winding 3628. Are each implemented as two separate windings.

The first winding 3624 is separated into two windings 3624a and 3624b, each winding 3624a and 3624b being wound in the longitudinal direction of the core 3622. At this time, each of the windings 3624a and 3624b are wound in the same direction, but the first winding 3624a provided on the upper side with respect to the center of the core 3622 is wound up to the upper end starting from the center of the core 3622. The first winding 3624b provided below the center of the core 3622 is wound up to the center of the core 3322.

The second winding 3628 is divided into two windings 3626a and 3626b, and each of the windings 3826a and 3626b is wound in the width direction of the core 3622. At this time, each of the windings 3626a and 3626b are wound in the same direction, but the second winding 3628a provided on the left side with respect to the center of the core 3622 is wound up to the left side starting from the center of the core 3622. The second winding 3826b provided on the right side of the core 3622 is wound up to the center of the core 3622 starting from the right side of the core 3622.

Similarly, each of the first windings provided in any one of the plurality of coils 3610 and 3620 may be formed in each coil of another type in which both ends thereof are positioned at both sides of one of the coils in the horizontal direction. Each is connected to one winding. In addition, each of the second windings provided in one of the plurality of coils is connected to each of the second windings provided in each of the coils whose both ends are located at both sides of one of the coils in the longitudinal direction.

As described above, the modular wireless power transmitter 3600 according to an embodiment of the present invention may configure the modular wireless power transmitter 3600 using coils 3610 and 3620 of different types. As shown in FIG. 31, the modular wireless power transmitter using different types of coils may be more efficient in connection between coils than the modular wireless power transmitter using the same type of coils.

The inverter 3630 is provided when the modular wireless power transmitter 3600 is used as a wireless power transmitter, and includes a first winding provided in the plurality of coils 3610 and 3620 constituting the modular wireless power transmitter 3600. And a current having a different phase difference from each other to the second winding. Meanwhile, in FIG. 31, the modular wireless power transmitter 3600 according to an embodiment of the present invention is illustrated as including one inverter 3630, but is not necessarily limited thereto. For example, the modular wireless power transmitter 3600 according to an embodiment of the present invention may have one or more according to a connection method (serial or parallel) between the plurality of coils 3610 and 3620 constituting the modular wireless power transmitter 3600. It may be implemented in the form having an inverter.

The auxiliary circuit 3640 is a circuit for assisting the connection between the plurality of coils 3610 and 3620 and may be implemented as a short circuit or a compensation circuit. On the other hand, the compensation circuit is a circuit inserted for the purpose of reducing the burden on the large reactive power produced by the coil, it may be typically implemented as a capacitor. The auxiliary circuit 3640 may be provided when the modularized wireless power transmitter 3600 is used as a wireless power transmitter or a wireless power receiver.

On the other hand, the modular wireless power transmission device 3600 according to an embodiment of the present invention selectively interrupts the electrical connection between the inverter 3630 and the plurality of coils 3610 and 3620 to selectively select the plurality of coils 3610 and 3620. It may be implemented in a form that further includes a switch 3650 to operate. In addition, the modular wireless power transmission apparatus 3600 according to an embodiment of the present invention may be implemented in a form further including a control device 3660 for controlling the operation of the inverter 3630 and the switch 3650. The controller 3660 includes an interface unit for receiving a user command, and controls the operation of the inverter 3630 and the switch 3650 according to the user command received from the interface unit.

32 to 36 is a view schematically showing a wireless power transmission device according to another embodiment of the present invention. Similarly, the wireless power transmission apparatus according to another embodiment of the present invention may be used as a wireless power transmitter or a wireless power receiver, respectively, according to the embodiment. On the other hand, the wireless power transmission apparatus according to another embodiment of the present invention can be implemented as a transmitting coil module according to the second embodiment of the present invention shown in FIG.

32 is a view showing a first implementation of a wireless power transmission device 3700 according to another embodiment of the present invention.

Referring to FIG. 32, the wireless power transmission apparatus 3700 according to another embodiment of the present invention includes a core portion 3710 and a winding portion 3720.

The core portion 3710 includes one or more first core units 3712 and one or more second core units 3714. Meanwhile, in the case of the first implementation of the wireless power transmission device 3700, one first core unit 3712 and one second core unit 3714 are provided.

The first core unit 3712 and the second core unit 3714 may be manufactured using any material including a ferrite material, and the shape may also be implemented in any shape including a quadrangle. In this case, the second core unit 3714 is disposed in a shape perpendicular to the center of the first core unit 3712, preferably, the first core unit 3712 to form a cross shape.

Each of the first core unit 3712 and the second core unit 3714 may be implemented as a separate core unit, and may be connected to each other. In some embodiments, the first core unit 3712 and the second core unit 3714 may be implemented as a single core unit. have.

The winding part 3720 includes a first winding 3722 wound around the first core unit 3712 and a second winding 3724 wound on the second core unit 3714. For example, the first winding 3722 and the second winding 3724 are wound at both ends of the first core unit 3712 and both ends of the second core unit 3714, respectively.

When the wireless power transmitter 3700 is used as a wireless power transmitter, the first winding 3722 and the second winding 3724 respectively receive alternating currents having a predetermined phase difference to form a rotating magnetic field. At this time, the alternating current applied to the first winding 3722 and the alternating current applied to the second winding 3724 preferably have a phase difference of 90 degrees, but are not necessarily limited thereto.

Meanwhile, in the case of the first winding 3722 and the second winding 3724 of the wireless power transmission device 3700 according to another embodiment of the present invention, the first winding and the first winding of the wireless power transmission device 3200 shown in FIG. 27 are described. Unlike the two windings, the windings are wound in a form that does not overlap each other, thereby making the thickness of the winding thinner (about 2 times). This is particularly advantageous when the wireless power transmitter 3700 is implemented as a wireless power receiver and embedded in a mobile device.

33 is a view showing a second embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention. Meanwhile, the second embodiment of the wireless power transmitter 3700 is a case where the wireless power transmitter is implemented in a modular model. Such a wireless power transmission device may be implemented in a form that additionally includes an inverter (not shown) when used as a wireless power transmission device.

As shown in FIG. 33, a second implementation form of the wireless power transmission device 3700 according to another embodiment of the present invention (hereinafter, will be described as a modular wireless power transmission device) may include a first core unit 3712. ) Is formed in a wider space, and a plurality of second core units 3714a, 3714a, 3714b, and 3714c vertically intersecting the first core unit 3712 are provided. Hereinafter, in FIG. 33, the first core unit 3712 is implemented as one example. However, the present disclosure is not limited thereto, and a plurality of first core units 3712 may be arranged in parallel with each other in the width direction. have. In this case, the second core unit 3714 crosses perpendicularly to each first core unit.

In the case of the modular wireless power transmission device 3700, the first core unit 3712 and the plurality of second core units 3714 may be manufactured as one body in a manufacturing stage for convenience of mass production. It may be manufactured by connecting a plurality of wireless power transmission device in the horizontal direction.

First winding 3722 and second winding 3724 are wound around first core unit 3712 and second core unit 3714, respectively. For example, the first winding 3722 is wound between both ends of the first core unit 3712 and each second core unit 3714, and the second core unit 3714 is the second winding 924. It is wound at both ends of).

34 is a view showing a third embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention.

As shown in FIG. 34, in the case of the third embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention, a wing (in the first embodiment of the wireless power transmission device 3700 shown in FIG. Wing) may be implemented in a form provided additionally. On the other hand, the wing is preferably a flange (Flange), but is not necessarily limited thereto.

The wings 3730 and 3740 may be further formed at one end of at least one of both ends of the first core unit 3712 and at either end of both ends of the second core unit 3714.

The wings 3730 and 3740 can be manufactured using any material, including ferrite material.

The wings 3730 and 3740 may be implemented in various shapes according to the embodiment. For example, the wings 3730 and 3740 may be embodied in a shape that increases in size or decreases in size toward the end so that the shape viewed from the top may have a trapezoidal shape or an inverted trapezoidal shape. Meanwhile, FIG. 34 illustrates a case where the wings 3730 and 3740 are implemented in a shape in which the size thereof decreases toward the end.

When the wireless power transmitter 3700 is used as a wireless power transmitter, the wings 3730 and 3740 allow the magnetic field to radiate to a wider area, and the wireless power transmitter 3700 is used as a wireless power receiver. If possible, it is possible to absorb a wider magnetic field.

35A is a view showing a fourth embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention. Meanwhile, in the fourth embodiment of the wireless power transmitter 3700 according to another embodiment of the present invention, the wings 3730 and 3740 may be additionally added in the second implementation of the wireless power transmitter 3700 illustrated in FIG. 33. If it is equipped.

As shown in FIG. 35A, wings 3730 and 3740 are further formed at both ends of the first core unit 3712 and both ends of the plurality of second core units 3714, respectively, so that wireless power is more efficient in a wider area. Can be delivered to Meanwhile, FIG. 35A illustrates a case where the wings 3730 and 3740 are implemented in a shape in which the size thereof decreases toward the end.

According to a fourth embodiment of the wireless power transmitter 3700 according to another embodiment of the present invention, when the wireless power transmitter 3700 is implemented as a wireless power receiver and embedded in a mobile device, more cores may be used. It works as a big advantage in that it can.

35B and 35C illustrate fifth and sixth implementations of the wireless power transmission apparatus 3700 according to another embodiment of the present invention.

As shown in FIG. 35B, the fifth embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention basically includes additional wings 3730 and 3740 as shown in FIG. 35A. 3730 and 3740 may be implemented in a shape that increases in size toward the end.

According to a fifth embodiment of the wireless power transmitter 3700 according to another embodiment of the present invention, when the wireless power transmitter 3700 is implemented as a wireless power receiver, the wireless power transmitter 3700 illustrated in FIG. 35A is illustrated. Compared to the fourth embodiment of the present invention, it is possible to absorb more magnetic fields in space.

As shown in FIG. 35C, the sixth embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention basically includes additional wings 3730 and 3740 as illustrated in FIG. 35A, and includes a core. Wings of different shapes for each unit may be implemented in a shape in which they are alternately arranged. For example, the wing 3730a formed in any one of the plurality of second core units included in the wireless power transmission device 3700 may be implemented in a shape in which its size increases toward an end thereof. The wings 3730b formed in the second core units respectively adjacent to the two core units may be implemented in a shape in which the size thereof decreases toward the end.

When the wireless power transmission device 3700 is used as a wireless power transmission device, both ends of the wings 3730 and 3740 formed in each core unit should not meet each other or be disposed too close to each other. If both ends of the wings 3730 and 3740 formed in each core unit meet each other or are disposed too close to each other, a rope is formed while generating a closed circuit having a small magnetoresistance between neighboring wings, and thus a wireless power transmission device 3700. The magnetic field it creates does not spread in space but only rotates inside. Meanwhile, the sixth embodiment of the wireless power transmission apparatus 3700 according to another embodiment of the present invention is implemented in a shape in which wings of different shapes are alternately arranged for each core unit, so that the third embodiment of the wireless power transmission apparatus 3700 is implemented. 5 Reduce magnetic field coupling between wings compared to implementation. Accordingly, the sixth embodiment of the wireless power transmission device 3700 according to another embodiment of the present invention, while taking some of the advantages of the fifth embodiment of the wireless power transmission device 3700, prevents the formation of an inner loop. Can be. On the other hand, the wireless power transmission apparatus 3700 according to the present embodiment is implemented so that the arrangement interval (d ₂ ) between the neighboring second core unit is approximately twice the value of the width (d ₁ ) of the second core unit Magnetic field coupling between neighboring wings can be further prevented.

36 is a view illustrating a seventh embodiment of a wireless power transmission device 3700 according to another embodiment of the present invention.

As shown in FIG. 36, the wireless power transmission apparatus 3700 according to another embodiment of the present invention may be implemented in a form in which an auxiliary winding 3750 is additionally provided. The auxiliary winding 3750 may be disposed at a predetermined distance from the wings 3730 and 3740 at one side of the wings 3730 and 3740, for example, in a direction in which a magnetic field is not used.

The auxiliary winding 3750 performs the same role as the auxiliary windings 3400a and 3400b described in FIG. 29, and for this purpose, the auxiliary winding 3750 flows to the first winding 3722 and the second winding 3724 of the wireless power transmission device 3700. It is preferable to apply a current having a phase difference of 180 degrees with the current, but is not necessarily limited thereto.

The auxiliary winding 3750 may be a winding of one turn or several turns with both ends shorted, or may use resonance by adding a capacitor in series. Meanwhile, when the auxiliary winding 3750 uses resonance, the resonant frequency of the auxiliary winding 3750 may be set lower than the frequency of the current flowing through the first winding 3722 and the second winding 924.

The auxiliary winding 3750 may be implemented to extend to the first winding 3722 or the second winding 3724 so that the current flowing in the first winding 3722 or the second winding 3724 flows intact (in this case, the winding It is formed to have a phase difference of 180 degrees by flipping the direction once). The current may be implemented by using an induced electromotive force by a magnetic field generated by the current flowing in the first winding 3722 and the second winding 3724.

37A to 37C and 38A to 38B schematically illustrate a wireless power transmission apparatus according to another embodiment of the present invention. Similarly, the wireless power transmission apparatus according to another embodiment of the present invention may be used as a wireless power transmitter or a wireless power receiver, respectively, according to the embodiment. However, when the wireless power transmission apparatus 3800 according to another embodiment of the present invention is used as a wireless power transmission apparatus, the efficiency is further maximized. Hereinafter, the wireless power transmission apparatus (see FIGS. 37A to 37C and 38A to 38B) An example in which 3800 is used as a wireless power transmitter will be described for the operation of each component.

37A to 37C are diagrams illustrating the most basic implementation of the wireless power transmitter 3800 according to another embodiment of the present invention.

37A to 37C, a wireless power transmitter 3800 according to another embodiment of the present invention may be a winding module including at least two winding units 3810, 3820, 3830, and 3840 in a horizontal and vertical direction, respectively. Is implemented.

In this case, among the winding units 3810, 3820, 3830, and 3840, the first winding unit 3810 and the third winding unit 3830 which face each other in a diagonal direction are applied with currents having the same phase, but the directions of the currents are mutually different. Is the opposite. According to an embodiment, the first winding unit 3810 and the third winding unit 3830 may be continuously connected to each other without interruption, and thus may be implemented as one winding unit.

In addition, among the winding units 3810, 3820, 3830, and 3840, the second winding unit 3820 and the fourth winding unit 3840 that face each other in a diagonal direction are applied with currents having the same phase to each other, but the direction of the currents Is the opposite. According to an embodiment, the second winding unit 3820 and the fourth winding unit 3840 may be continuously connected to each other without interruption, and thus may be implemented as one winding unit.

Hereinafter, the first winding unit 3810 and the third winding unit 3830 will be described as a D-type winding module by illustrating the second winding unit 3820 and the fourth winding unit 3840 as a Q-type winding module.

The first winding unit 3810 and the third winding unit 3830 form a rotating magnetic field by receiving a current having a predetermined phase difference from the second winding unit 3820 and the fourth winding unit 3840. In this case, the current applied to the first winding unit 3810 and the third winding unit 3830 and the current applied to the second winding unit 3820 and the fourth winding unit 3840 preferably have a phase difference of 90 degrees. One is not necessarily limited thereto.

Each of the winding units 3810, 3820, 3830, and 3840 may be embodied in any one of rectangular, circular, and sector shapes as illustrated in FIGS. 37A through 37C.

38A to 38B, the wireless power transmitter 3800 according to another embodiment of the present invention uses the auxiliary core 3850 as a component in the wireless power transmitter 3800 shown in FIGS. 37A to 37C. It may be implemented in a form provided additionally. Meanwhile, in FIGS. 38A to 38B, the wireless power transmitter 3800 according to another exemplary embodiment of the present invention has only the first winding unit 3810 and the third winding unit 3830, but the wireless power transfer. It is merely an example to more clearly describe the configuration of the auxiliary core 3840 in the apparatus 3800, and is implemented in a form in which the second winding unit 3820 and the fourth winding unit 3840 are included. .

The auxiliary core 3850 increases the strength of the magnetic field generated by the wireless power transmitter 3800. At this time, the auxiliary core 3850 is preferably located between the center of each winding unit facing each other in the direction of formation of the rotating magnetic field, that is, each of the winding units 3810, 3820, 3830, 3840, but is not limited thereto. It doesn't happen.

39 is a diagram illustrating a modular model of a wireless power transmission device according to another embodiment of the present invention. Meanwhile, the modular model of the wireless power transmission device is implemented in a form in which the winding modules of the wireless power transmission device 3800 according to another embodiment of the present invention are arranged regularly as one unit module to radiate a magnetic field in a large space. do. Hereinafter, in FIG. 39, the wireless power transmission apparatus according to another embodiment of the present invention will be described by illustrating a modular model when the wireless power transmission apparatus is implemented as a wireless power transmitter. However, the present disclosure is not limited thereto. Even when implemented as a device, the same or similar modular model may be applied.

As shown in FIG. 39, the modular model of the wireless power transmission device according to another embodiment of the present invention (hereinafter, will be described as a modular wireless power transmission device) includes a plurality of winding modules 3910 and an inverter ( 3920a, 3920b, and auxiliary circuit 3930.

The winding module 3910 constituting the modular wireless power transmission device 3900 is regularly arranged horizontally and vertically, respectively.

Each winding module 3910 basically has a winding module of the wireless power transfer device 3800 shown in FIGS. 37A-37C as a basic form. In this case, the first winding unit provided in one of the winding modules of the plurality of winding modules is connected to the winding module located on the left side of the one winding module based on the horizontal direction for more efficient connection between each winding module 3910. It may be connected to the third winding unit provided.

In addition, the third winding unit provided in one of the winding modules of the plurality of winding modules is connected to the winding module located on the right side of the one winding module based on the horizontal direction for more efficient connection between each winding module 3910. It is connected with the provided first winding unit.

In addition, the second winding unit provided in one of the winding modules of the plurality of winding modules is connected to the winding module located on the right side of the one winding module based on the longitudinal direction for more efficient connection between each winding module 3910. It is connected to the fourth winding unit provided.

In addition, the fourth winding unit provided in one of the winding modules of the plurality of winding modules is connected to the winding module located on the left side of the one winding module based on the longitudinal direction for more efficient connection between each winding module 3910. It is connected with the provided second winding unit.

On the other hand, the present embodiment is not limited in a specific manner in the connection between the winding unit provided in the plurality of winding modules, it can be implemented in any way if a rotating magnetic field can be formed in a large space. For example, the first winding unit provided in one of the winding modules of the plurality of winding modules is connected to the first winding unit provided in the winding module located on the left side of the one of the winding modules in the horizontal direction. The third winding unit provided in any one of the winding modules may be connected to the third winding unit provided in the winding module located on the right side of the one winding module in the horizontal direction.

In addition, the second winding unit provided in one of the winding modules of the plurality of winding modules is connected to the second winding unit provided in the winding module located on the right side of any one winding module based on the longitudinal direction, The fourth winding unit provided in one of the winding modules may be connected to the fourth winding unit provided in the winding module located on the left side of the one winding module based on the longitudinal direction.

In another embodiment, each winding module 3910 has a winding module of the wireless power transfer device 3800 shown in FIGS. 37A-37C in its basic form, while FIG. 40 provides a more efficient connection between each winding module 3910. As shown in FIG. 2, the D-type winding module and the Q-type winding module constituting each winding module 3910 may be implemented in a form in which two types of winding modules overlap. In FIG. 40, two types of the D-type winding module among the D-type winding module and the Q-type winding module constituting each winding module 3910 have been illustrated. As shown in FIG. 40, the D-type winding module is implemented as the first type and the second type, and each type implements the first winding unit 33910 and the third winding unit 33930 as one winding unit. The directions of the currents are opposite to each other. However, the first type and the second type are implemented in a form in which the inflow directions of the currents are opposite to each other. The same applies to the Q type winding module.

Similarly, each of the first winding units provided in one of the winding modules of the plurality of winding modules is a winding located on the left side of any one winding module with respect to the horizontal direction for more efficient connection between each winding module 3910. It may be connected to each third winding unit provided in the module.

In addition, each of the third winding unit provided in one of the winding modules of the plurality of winding modules is a winding located on the right side of any one winding module based on the horizontal direction for more efficient connection between each winding module 3910 It may be connected to each first winding unit provided in the module.

In addition, each of the second winding unit provided in one of the winding modules of the plurality of winding modules is a winding located on the right side of any one winding module based on the longitudinal direction for more efficient connection between each winding module 3910 It may be connected to each of the fourth winding unit provided in the module.

In addition, each of the fourth winding units provided in one of the winding modules of the plurality of winding modules may be provided in the winding module located on the left side of one of the winding modules for more efficient connection between the respective winding modules 3910. It can be connected with the second winding unit of.

Inverters 3920a and 3920b are provided when the modular wireless power transmitter 3900 is used as a wireless power transmitter, and the D-types included in the plurality of winding modules 3910 constituting the modular wireless power transmitter 3900. The winding module and the Q type winding module are provided with current having a predetermined phase difference from each other. Meanwhile, in FIG. 39, the modular wireless power transmission device 3900 according to another embodiment of the present invention uses the D-type inverter 3920a corresponding to the D-type winding module and the Q-type inverter 3920b corresponding to the Q-type winding module. Although illustrated as including, the present invention is not necessarily limited thereto. For example, the modular wireless power transmission apparatus 3900 according to another embodiment of the present invention may be implemented in a form having various numbers of inverters according to a connection method between the plurality of winding modules 3910.

The auxiliary circuit 3930 may be implemented as a short circuit or a compensation circuit as a circuit for assisting the connection between the plurality of winding modules 3910.

The modular wireless power transmission apparatus 3900 according to another embodiment of the present invention selectively operates the plurality of winding modules 3910 by intermittent electrical connections between the inverters 3920a and 3920b and the plurality of winding modules 3910. It may be implemented in a form that further includes a switch (3940a, 3940b). In addition, the modular wireless power transmission device 3900 according to another embodiment of the present invention in the form further includes a control device (3950a, 3950b) for controlling the operation of the inverters 3920a, 3920b and the switches (3940a, 3940b). Can be implemented.

41A shows a wireless power transfer system according to a first embodiment of the present invention.

Referring to FIG. 41A, the wireless power transmission system according to the first embodiment of the present invention may include a coil module 110, an inverter 120, a switch 130, a power supply 140, a receiver 150, and a control. Device 160.

The coil module 110 receives AC power from the power supply device 150 and generates a magnetic field. When the coil module 110 receives the AC power from the power supply device 150 to generate a magnetic field, the receiving end (not shown) receives the generated magnetic field. The receiving end (not shown) induces a potential difference at the receiving end (not shown) due to the flowing magnetic field.

Inverter 120 serves to convert the frequency or phase of the AC power provided by the power supply unit to the coil module. In order for the coil module to generate an even magnetic field, AC power having no phase difference or a constant phase difference should be supplied according to the type of coil module, and the inverter 120 converts the phase of the AC power provided to the coil module. Can be.

In addition, the inverter 120 may be connected together with a resonant capacitor (not shown). It serves to cancel the inductance component of the transmitter. If the coil module is connected to the inverter without the resonant capacitor, the reactance of the winding (2π * f * L) is too large, which increases the apparent power that the inverter must handle. Capacitors have a negative reactance (-1 / (2π * f * C)), so if they are connected in series with the windings, the reactance cancels out, resulting in a small overall impedance. This allows the inverter to drive the windings with less apparent power.

The switch 130 determines whether to provide AC power provided by the power supply unit to the coil module. Located between each coil module and the power supply device, it is determined whether AC power is supplied to each coil module according to whether each switch 140 is turned on or turned off.

The power supply device 140 supplies power to generate a magnetic field in the coil module. An AC power source having 60 Hz may be supplied as an AC power source for the operation of the power supply device, but the present invention is not limited thereto.

The receiving device 150 receives one of a synchronization signal generated from an adjacent control device, a magnetic field generated from an adjacent coil module, and an induced current generated from the coil module.

First, the receiver 150 may receive a synchronization signal for synchronizing a magnetic field generated in each coil module from an adjacent control device. In this case, the receiving device 150 may receive the synchronization signal of the adjacent control device by wire communication such as a power communication line for the AC power supply device to transfer AC power to the coil module, or may receive by wireless communication. Secondly, the receiver 150 may include a separate magnetic field sensing device to receive a magnetic field generated by an adjacent coil module. Finally, the coil module connected to the receiver receives the magnetic field generated by the adjacent coil module, and the coil module connected to the receiver generates the induced current by the magnetic field. The receiver 150 may receive the induced current.

The controller 160 controls the inverter to have a maximum value of an equal magnetic field generated in the coil module by using any one of a synchronization signal, a magnetic field, and an induced current received from the receiver. Since the receiving end should be able to receive power wirelessly anytime and anywhere in the area where the power can be wirelessly received, the magnetic field should be distributed as evenly as possible in the area where the power can be wirelessly received. Even if a plurality of coil modules generate an equal magnetic field, interference may occur between the equal magnetic fields generated in each coil module. Therefore, in order to prevent such interference, the control device controls an inverter connected to each coil module to synchronize a magnetic field generated in each coil module.

41B shows a wireless power transfer system according to a second embodiment of the present invention.

Referring to FIG. 41B, the wireless power transmission system according to the second embodiment of the present invention uses a coil module 110, an inverter 120, a switch 130, a power supply device 140, and a central controller 170. Include.

The central control unit 170 is connected to each inverter serves to control all the inverters at once. One method of synchronizing the magnetic fields generated in each coil module, the central control unit controls all the inverters at once. The central controller can control the inverter all at once to supply AC power with the same phase and frequency, and the coil module that receives AC power with the same phase and frequency generates an equal magnetic field of the same phase so Generate a magnetic field. In FIG. 41, the central controller is shown as being wired to the controller, but may be wirelessly connected to each controller.

42A is a block diagram showing the configuration of a control device according to the first embodiment of the present invention.

Referring to FIG. 42A, the control device according to the first embodiment of the present invention includes a detector 210, a selector 220, a determiner 230, and a controller 240.

The detector 210 receives the induced current or the magnetic field from the receiver 150 shown in FIG. 41 and detects the direction and magnitude of the magnetic field. The detector 210 may receive the induced current or the magnetic field generated by the receiver illustrated in FIG. 41, and detect the direction and magnitude of the magnetic field using the magnetic sensor from the received induced current or the magnetic field.

The selector 220 determines the direction and magnitude of the magnetic field detected by the detector, and selects the reference magnetic field.

When there is one magnetic field detected by the detector, the detected magnetic field is selected as a reference magnetic field to determine the direction and magnitude of the selected reference magnetic field. When the sensing unit detects more than one magnetic field, the direction of the selected magnetic field is determined by comparing the magnitude of the detected magnetic field with the largest magnetic field selected as the reference magnetic field. When the strengths of the magnetic fields are the same, any magnetic field is selected as the reference magnetic field.

The determination unit 230 determines the phase of the reference magnetic field having the direction and magnitude selected by the selection unit. The determination unit 230 may include a phase locked loop (PLL) circuit to determine the phase of the selected reference magnetic field. The determination unit 230 may determine the phase of the reference magnetic field selected by the selector from the PLL circuit.

The controller 240 controls the inverter to have a phase of the reference magnetic field determined by the determination unit. The inverter module is controlled to control the phase of the AC power provided to the coil module connected to the control device so that the coil module connected to the control device has a phase of the reference magnetic field to generate the maximum equal magnetic field.

The controller controls the inverter or the switch so that the coil module connected to the control unit receives the magnetic field generated by the adjacent coil module, thereby stopping the role of the winding in which the coil module connected to the control unit generates the magnetic field for a certain period of time within an operation cycle. Can be controlled. The inverter may increase the frequency of the AC power so that the coil module connected to the control device does not generate a magnetic field for a predetermined time, or may be controlled to turn off the switch so that the coil module connected to the control device does not generate a magnetic field. During this time, the coil module connected to the control device receives the magnetic field generated by the adjacent coil module, and the induced current generated is received by the receiving device shown in FIG. When the control unit stops for a predetermined time and then controls to generate a magnetic field again, the controller controls the power supply phase that has been stopped for a certain period of time to have a phase of the power source that would have had not been stopped for a certain period of time. Accordingly, the control is performed to have the same phase of the magnetic field generated before stopping for a predetermined time. For example, when the control unit controls to stop for a predetermined time, the control unit stores the phase of the AC power supplied to the coil module connected to the existing control device, and controls to generate a magnetic field again. According to the present invention, AC power may be provided to the coil module connected to the control device. However, when controlling the control unit to stop for a predetermined time, the phase of the reference magnetic field determined by the determination unit 240 may be different from the magnetic field to be generated depending on the phase of the stored AC power from the magnetic field received by the coil module connected to the control device. . In this case, the controller controls the inverter to have a phase of the reference magnetic field determined by the determination unit 240 from the magnetic field received by the coil module connected to the control device.

Each component included in the control device 130 is connected to a communication path connecting a software module or a hardware module inside the device to operate organically with each other. These components communicate using one or more communication buses or signal lines.

42B is a block diagram showing the construction of a control device according to the second embodiment of the present invention.

Referring to FIG. 42B, the control apparatus according to the second embodiment of the present invention includes a controller 250 and a transmitter 260.

The control unit 250 illustrated in FIG. 42B serves to control the inverter similarly to the control unit 240 illustrated in FIG. 42A, and the coil module connected to the control unit serves as a winding in which a magnetic field is generated for a predetermined time in an operation cycle. You can control it to stop. The difference is that the control unit shown in FIG. 42B receives a synchronization signal from the receiving device 150 shown in FIG. 41A. The inverter is controlled from the received synchronization signal so that the maximum equal magnetic field is generated.

The transmitter 260 transmits a synchronization signal to be transmitted to the other controller connected to the adjacent coil module by the controller 250 to another receiver connected to the adjacent coil module.

Each component included in the control device 130 is connected to a communication path connecting a software module or a hardware module inside the device to operate organically with each other. These components communicate using one or more communication buses or signal lines.

43A is a flowchart illustrating a control method according to an embodiment of the present invention.

The preset coil module detects the direction and magnitude of the magnetic field generated from the coil module adjacent to the preset coil module (S310). The preset coil module senses the direction and magnitude of the magnetic field by receiving a induced current from the receiver of the control device or by receiving a magnetic field directly generated from the coil module adjacent to the preset coil module. The preset coil module may receive the induced current generated in the receiver of the control device and may receive the induced current from the preset coil module. In receiving the induced current from the preset coil module, the preset coil module controls the inverter or the switch to stop the role of the winding generating the magnetic field for a predetermined period of time. The inverter lowers the frequency of the AC power source so that the preset coil module does not generate a magnetic field for a certain period of time, or the switch may be turned off so that the preset coil module does not generate a magnetic field. During this period, the predetermined coil module receives the magnetic field generated by the adjacent coil module, and thus receives the induced current generated by the receiver of the control device and detects the direction and magnitude of the magnetic field of the adjacent coil module by using the received current.

 The reference magnetic field of the adjacent coil module is selected by determining the direction and magnitude of the detected magnetic field (S320). If there is one magnetic field detected, the detected magnetic field is selected as the reference magnetic field. If there is more than one magnetic field detected, the largest magnetic field is selected as the reference magnetic field by comparing the magnitude of the detected magnetic field. When the strengths of the magnetic fields are the same, any magnetic field is selected as the reference magnetic field.

The phase of the selected reference magnetic field is determined (S330). The phase of the selected reference magnetic field can be determined through the PLL circuit.

The inverter is connected to the coil module preset to have the determined reference magnetic field (S340). The inverter is controlled to control the phase of the AC power provided to the preset coil module so that the preset coil module has the phase of the reference magnetic field to generate the maximum equal magnetic field.

43B is a flowchart illustrating a control method according to another embodiment of the present invention.

Using a power communication line for providing AC power to the coil module, and transmits and receives a synchronization signal between the inverter (S350). Rather than detecting the direction and magnitude of the magnetic field from adjacent coil modules, each controller sends and receives inverter synchronization signals between the controllers.

The coil module controls the inverter connected to the preset coil module by using the synchronization signal transmitted and received to generate the maximum equal magnetic field (S360). The controller uses the inverter synchronization signal of the adjacent controller received from the receiver to control the inverter in accordance with the received synchronization signal.

43C is a flowchart illustrating a control method according to another embodiment of the present invention.

Using the wireless communication between the control device, and transmits and receives a synchronization signal between the inverter (S370). Rather than detecting the direction and magnitude of the magnetic field from adjacent coil modules, each controller transmits and receives inverter synchronization signals between the controllers using wireless communication.

The coil module controls the inverter connected to the preset coil module by using the synchronization signal transmitted and received to generate the maximum equal magnetic field (S380). The controller uses the inverter synchronization signal of the adjacent controller received from the receiver to control the inverter in accordance with the received synchronization signal.

In FIGS. 43A, B, and C, processes S310 to S380 are sequentially executed. However, this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, one of ordinary skill in the art to which an embodiment of the present invention belongs may execute the process described in FIGS. 43A, B, and C in a manner that does not depart from the essential characteristics of the embodiment of the present invention, or may perform processes S310 to 43A, B, and C are not limited to the time-series order because they may be variously modified and modified by executing one or more processes of the process S380 in parallel.

On the other hand, the processes shown in Figures 43a, b and c can be implemented as computer-readable code on a computer-readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data that can be read by a computer system is stored. That is, the computer-readable recording medium may be a magnetic storage medium (for example, ROM, floppy disk, hard disk, etc.), an optical reading medium (for example, CD-ROM, DVD, etc.) and a carrier wave (for example, the Internet Storage medium). The computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

44A is a diagram illustrating a transmitting coil module according to a first embodiment of the present invention, and FIG. 44B is a diagram showing a shape of a magnetic field generated from the transmitting coil module according to the first embodiment of the present invention.

44A is a perspective view of a straight transmission coil module 410. The winding 420 is spiral wound around the ferrite core 430. In order to minimize the AC resistance, the winding 420 is a Litz Wire and the diameter may be set to 5mm. The current flowing in the linear transmission coil module 410 induces a magnetic field. The magnetic field flowing into the receiver (not shown) induces a potential difference at the receiver.

The magnetic flux density of the linear transmission coil module 410 has a maximum value at the center of the core and decreases toward the end. Thus, most of the hysteresis losses occur in the center of the core. Since the magnetic flux density is divided by the vertical area that transmits the total amount of magnetic fluxes, the magnetic flux density can be lowered if the cross-sectional area of the central portion is widened. In addition, both ends of the core need not be as wide a cross-section as the middle. Therefore, if the center part is thickened and the shape is made thinner toward both ends, the magnetic flux density is uniformly induced.

A strong magnetic field must be created for long distance power transmission. However, the winding itself is a problem because a large magnetoresistance occurs in the winding inner space. Long cores are inserted into the windings to reduce this magnetoresistance. The winding with the core inserted increases the magnetic flux density through a decrease in the magnetoresistance compared to the winding in which the core is inserted. In addition, in the case of the annular transmitting coil module, which is a structure of a general transmitting coil module, the magnetic field is inversely proportional to the cube R ³ of the distance R with respect to the x-axis direction. However, the magnetic field generated by the linear transmission coil module 410 is inversely proportional to the distance R to the square of the distance R ² with respect to the x-axis direction. Accordingly, it can be seen that the transmission coil module of FIG. 44A increases the magnetic flux density by the ferrite core, and the loss according to the distance of the generated magnetic field also increases compared to the conventional transmission coil module.

44B is shown based on values simulated with ANSOFT MAXWELL v14.0. 44B is a magnetic force line diagram around the transmitting coil module and the receiving coil module. It can be seen that a plurality of magnetic force lines generated in the transmitting coil module are chained to the receiving coil module. Longer anode cores must be used to increase the linkage of the magnetic field lines. When the length of the ferrite core is extended to the outside of the winding area unlike the general core, the magnetoresistance can be lowered by increasing the binding factor of the winding. In the long distance transmission, the longer the winding length, the larger magnetic flux density is measured in the receiving coil module. Since the voltage induced in the receiving coil module is proportional to the magnetic flux density passing through the winding, the core should be long for long distance transmission.

45 is a view showing the form and configuration of a transmitting coil module according to a second embodiment of the present invention.

The transmitting coil module 510 according to the second embodiment of the present invention has a Yagi antenna form. Several linear transmission coil modules shown in FIG. 44A may be arranged around a predetermined reference axis in a direction perpendicular to the reference axis.

In addition, as the distribution or intensity of the magnetic field radiated from the transmitting coil module increases, it is necessary to block an unwanted leakage magnetic field from leaking to the outside. Therefore, to prevent this and increase the power transmission efficiency, the magnetic field reflection coil module 520 may be additionally installed. As illustrated in FIG. 45, the magnetic field reflection coil module 520 may be installed in a direction perpendicular to the transmission coil module that emits a magnetic field or may face the transmission coil module that emits a magnetic field. The magnetic field reflection coil module 520 may include a resonance capacitor.

The above description is merely illustrative of the technical idea of the present embodiment, and those skilled in the art to which the present embodiment belongs may make various modifications and changes without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical idea of the present embodiment but to describe the present invention, and the scope of the technical idea of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present embodiment.

(Explanation of the sign)

110a to c: coil module 120a to c: inverter

130a to c: switch 140: power supply

150a to c: receiver 160a to c: controller

170: central control unit 210: detection unit

220: selection unit 230: determination unit

240: control unit 250: control unit

260: transmitter 410: linear transmission coil module

420: winding 430: core

510: transmitting coil module 520: magnetic field reflection coil module

600: wireless power transmitter installed outdoors

610: cylindrical core 620: feed cable

630: transmitting coil module 632: upper transmitting coil module

634: Lower transmitting coil module 636: First upper transmitting coil module

638: first lower transmitting coil module 642: first upper bar core

644: second upper rod core 646: third upper rod core

648: fourth upper rod core 651: first lower rod core

652: second lower rod core 653: third lower rod core

654: fourth lower bar core 655: fifth lower bar core

656: sixth lower rod core 712: first protruding wing

714: second protruding wing 716: third protruding wing

718: fourth protruding wing 722: first protruding wings

724: second protruding double wing 726: third protruding double wing

728: fourth protruding double wing

800: a wireless power transmitter installed indoors

810: rod core 820: feed cable

830: first wing 840: second wing

850: auxiliary wing

1200: wireless power transmitter according to the fourth embodiment

1210: dipole coil module 1212: core

1214: feed cable 1220: reflector

1300: a wireless power transmitter according to a fifth embodiment

1310: separator

1400: a wireless power transmitter according to a sixth embodiment

1410: secondary separator

1500: wireless power transmitter according to the seventh embodiment

1800: main body of mobile terminal 1810: metal shield plate

1820: receiving core 1821: torso

1822: protrusion 1830: receiving cable

1840: secondary shield 1850: secondary core

1910: planar member 1920: first shielded loop circuit

1930: second shielded loop circuit 1940, 1950: third shielded loop circuit

1960: fourth shielded loop circuit 2010: human body

2100: wireless power transmitter 2110: core part

2115 cores 2120a to 2120f: first winding

2130a to 2130f: second winding

3200, 3700, 3800: Wireless Power Transmitter

3210, 3612: cores 3220, 3720: windings

3222, 3614, 3624, 3722: first winding 3224, 3616, 3626, 3724: second winding

3300: metal plate 3400a, 3400b, 3750: auxiliary winding

3500, 3850: secondary core

3600, 3900: Modular Wireless Power Transfer

3610, 3620: coil 3630, 3920a, 3920b: inverter

3640, 3930: auxiliary circuit 3712: first core unit

3714: second core unit 3730, 3740: wing

3810: first winding unit 3820: second winding unit

3830: third winding unit 3840: fourth winding unit

3910: winding module

CROSS-REFERENCE TO RELATED APPLICATION

This patent application is filed with a patent application No. 10-2014-0128632 filed with Korea on September 25, 2014, and a patent application No. 10-2014-0132709 filed with Korea on October 01, 2014, October 2014 Patent Application No. 10-2014-0132691, filed in Korea on October 01, 2014 Patent Application No. 10-2014-0133145, filed in South Korea on October 02, 2014 Patent application, filed in Korea on April 14, 2015 Priority to No. 10-2015-0052323 and Patent Application No. 10-2015-0125000, filed in Korea on September 03, 2015, pursuant to U.S. Patent Act Article 119 (a) (35 USC § 119 (a)). All contents are hereby incorporated by reference in this patent application. In addition, if this patent application claims priority for the same reason for countries other than the United States, all its contents are incorporated into this patent application by reference.

Claims (18)

1. A wireless power transmitter including N rod cores having a shape disposed to cross each other, and a feeding cable wound around the N rod cores; And

   Receiving a magnetic flux generated by the wireless power transmission unit includes a receiving unit for generating power,

   Wireless power transceiver, characterized in that the current is applied to each of the feed cable having a phase difference determined by 180 ° / N.
2. The method of claim 1,

   And a receiving core included in the receiving unit has an I shape.
3. The method of claim 1,

   Wireless power transmission and reception device further comprising a reflector plate located side by side in the longitudinal direction of the rod-shaped core on one side of the rod-shaped core, at a predetermined distance from the rod-shaped core.
4. A dipole coil module including a core and a feed cable wound around the core and receiving an AC power to generate a magnetic field; And

   Separator plate formed in a central portion with respect to the longitudinal direction of the dipole coil module surrounding the dipole coil module

   Wireless power transmission device comprising a.
5. A cylindrical core installed perpendicularly to the ground relative to the ground;

   A feed cable wound around the tubular core; And

   A plurality of rod-shaped cores connected to one end of the cylindrical core and protruding in a direction not parallel to a longitudinal direction of the cylindrical core;

   Wireless power transmission device comprising a.
6. Rod-shaped cores;

   A first wing positioned at one end of the rod-shaped core;

   A second wing positioned at the other end of the rod-shaped core; And

   Feeding cable wound around the rod-shaped core

   It includes, The first wing, The second wing is a wireless power transmitter, characterized in that a plurality of each provided at both ends of the rod-shaped core.
7. The method of claim 6,

   The wireless power transmitter,

   And at least two rod-shaped cores, and are disposed to cross each other.
8. In the wireless power transceiver,

   A core part including multiple cores having a length longer than a width or a thickness, wherein the cores are arranged in a grid structure; And

   A winding unit including multiple windings, wound around each core included in the core unit, generating a magnetic field by receiving AC power, or receiving a magnetic field to induce a current.

   Wireless power transceiver comprising a.
9. The method of claim 8,

   And a metal plate positioned at one side of the core part at a predetermined distance from the core part.
10. A core portion including at least one first core unit and at least one second core unit, wherein the at least one second core unit is disposed in a shape perpendicular to the first core unit to form a cross shape; And

    A winding part including a first winding wound on the first core unit and a second winding wound on the second core unit.

    Wireless power transmission device comprising a.
11. The method of claim 10,

    And at least one end of at least one of both ends of the first core unit and at least one end of both ends of the second core unit.
12. The method of claim 11,

    Wireless power transmission device further comprises an auxiliary winding which is located at one side of the wing at a predetermined interval with the wing.
13. The method of claim 10,

    And a metal plate positioned at one side of the core part at a predetermined distance from the core part.
14. In the wireless power transmission device,

    Including a plurality of coils each horizontally and vertically,

    Each of the plurality of coils,

    A core having a predetermined width and length; And

    A winding part including a first winding wound on the core in a longitudinal direction of the core and a second winding wound on the core in a width direction of the core;

    Wireless power transmission device comprising a.
15. The method of claim 14,

    And a metal plate positioned at one side of the core at a predetermined distance from the core.
16. In the wireless power transmission device,

    Including a plurality of winding modules each horizontally and vertically,

    Each of the plurality of winding modules,

    A first winding unit and a third winding unit each including at least two winding units each of the width and the length, and facing each other in a diagonal direction among the winding units; And a fourth magnetic winding unit and a current having a predetermined phase difference from each other to form a rotating magnetic field.
17. The method of claim 16,

    And an auxiliary core positioned between a central portion of each of the winding units facing each other in a diagonal direction among the winding units.
18. An apparatus for transmitting power wirelessly,

    A plurality of coil modules for generating a magnetic field to radiate evenly or receiving a radiated magnetic field;

    A plurality of inverters (Inverter) for converting the frequency or phase of the AC power provided to each of the plurality of coil modules;

    The magnetic field generated by the coil module adjacent to the preset coil module in the plurality of coil modules, the induced current generated by the preset coil module by the magnetic field generated by the adjacent coil module, and transmitted by the control device connected to the adjacent coil module A plurality of receivers for receiving any one of a synchronization signal;

    A plurality of control devices for respectively controlling the plurality of inverters so that the magnetic fields generated in the plurality of coil modules have the same phase by using what each of the plurality of receiving devices receives;

    A power supply device for providing the AC power to the plurality of coil modules, respectively; And

    A plurality of switches interposed between the power supply device and each of the plurality of inverters to control the connection of the power supply device and each of the plurality of inverters;

    Wireless power transmission device comprising a.

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