KR20150113258A - Wireless Electric Power Supply Apparatus - Google Patents

Abstract

An embodiment of the present invention relates to a wireless electric power supply apparatus which reduces core loss, obtains a relatively large inductive voltage, and has high compatibility with an existing current collector. According to an embodiment of the present invention, the apparatus can be easily manufactured due to having a relatively simple structure, thereby saving manufacturing costs, and especially has a light volume of a feeder core, so the entire wireless electric power supply apparatus takes less spatial constraints.

Description

[0001] WIRELESS POWER SUPPLY APPARATUS [0002]

An embodiment of the present invention relates to a wireless power supply.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

Generally, an electric vehicle refers to a vehicle that uses electricity as a power source for moving a vehicle. In order to operate an electric vehicle, an electric vehicle is charged with electric power charged by charging the battery mounted on the electric vehicle. In order to charge the electric power of such an electric vehicle, a person or a mechanical device supporting the charge directly connects the charging wire to the vehicle, thereby not only inconvenience the charging, but also, in the process of connecting the electric plug to the electric car, There is a dangerous problem. The method of charging the battery of the electric vehicle using the charging wire in this way causes a disadvantage of the user and there is a risk of electric shock, and research and development of a wireless power supply device capable of charging the battery of the electric vehicle by radio have recently been actively conducted .

Generally, a wireless power supply apparatus uses a method of supplying a high-frequency power to form a magnetic flux and using an induced voltage generated by a change in magnetic flux. 1 is a perspective view showing a power-saving device 100 used in a conventional wireless power supply apparatus. When high frequency power is supplied from the external power source to the feeder line 20, magnetic flux is generated in the power feeding core portion 10 formed by arranging the rod-shaped power feeding cores 11 side by side. The generated magnetic flux is a magnetic flux linking to the current collecting core portion 30 including the current collecting core 31, and an induced voltage corresponding to the magnetic flux is generated in the current collecting line 40.

However, the power feeder 100 used in the conventional wireless power supply device has a long MPL (Magnetic Path Length) due to the structure of the power feeding core portion 10. [ That is, the efficiency of the power-saving device 100 is lowered because the path through which the magnetic field generated by the power-feeding core 11 is concentrated is long and the core loss is large. Further, since the volume of the power supply core 11 is large, it is disadvantageous also in terms of space efficiency and production cost.

An embodiment of the present invention has a main purpose of providing a wireless power supply device which can reduce core loss and can obtain an induction voltage of a relatively large size and is highly compatible with a conventional power collecting device.

According to an embodiment of the present invention, there is provided a power supply device comprising: a pair of a power supply core portion formed by arranging a plurality of power supply cores in a predetermined direction and disposed in parallel with each other with a predetermined width; And a power feeding part including a feeding coil part disposed in the feeding core part.

A power collecting core portion disposed to be spaced apart from one side of the feeding portion, the magnetic flux generated from the power feeding core portion passing through the power collecting core portion; And a current collecting part including a current collecting part disposed in the current collecting core.

The current collecting core portion may include a plurality of bar-shaped current collecting cores formed in a predetermined direction.

The current-collecting coil portion may include a plurality of current-collecting coils wound in an annular shape and arranged on both sides in the width direction of the current-collecting core portion in a direction toward the feed portion.

Wherein the current collecting core portion includes a current collecting base core having a predetermined length and a predetermined width, a current collecting side core which is perpendicular to a plane formed by the current collecting base core at both side ends in the width direction and each protruding in the same direction, And a current collecting central core protruding in the same direction as the current collecting side core.

The current-collecting coil unit may include a plurality of current-collecting coils wound around the current-collecting center core or the current-collecting side core.

The current collecting core may further include a side protruding portion protruding in the width direction from an end of the current collecting side core.

The power supply core may be formed in an L shape including a horizontal member disposed horizontally on a plane formed by the power supply core portion and a vertical member extending on one end of the horizontal member in a direction perpendicular to the horizontal member.

The power feeding core may be aligned in a direction perpendicular to a plane formed by the vertical core member.

The feed core may be aligned such that the vertical member is positioned at the edge of the width.

The power supply coil unit may be disposed above the horizontal member.

The power supply coil unit may be disposed at an upper portion of the horizontal member and at a portion where the horizontal member and the vertical member are connected.

The power supply unit may be fixedly coupled to the ground, and the power collecting unit may be movable in a longitudinal direction of the power supply core unit.

The power supply unit may be fixedly coupled to the ground, and the current collector may be coupled to the moving body.

According to another aspect of the present invention, there is provided a power feeding device comprising: a pair of L-shaped power feeding cores arranged in a predetermined direction and having a predetermined width; A power feeder having a power supply coil disposed in a core portion; And a current collecting part disposed at a distance from one side of the feeding part and including a current collecting core part having a plurality of rod-shaped current collecting cores aligned in a predetermined direction, and a plurality of current collecting coils disposed in the current collecting core, Wherein the current-collecting coil is wound in an annular shape and is disposed at both end portions in the width direction of the current-collecting core portion in a direction toward the feed portion.

According to another aspect of the present invention, there is provided a power supply device comprising: a power supply core portion having a pair of L-shaped power supply cores arranged in parallel in a predetermined direction, A feeding part having a feeding coil disposed in the feeding core part; A current collecting base core disposed at a distance from one side of the power feeder, the current collecting base core having a predetermined length and a predetermined width; And a current collecting portion having a current collecting core portion having a current collecting core portion protruding in the same direction as the current collecting side core portion in the widthwise center portion and a plurality of current collecting coils wound around the current collecting core portion, Is wound on the current collecting central core or the current collecting side core.

According to an embodiment of the present invention, core loss in a wireless class display can be reduced and an induction voltage of a relatively large size can be obtained.

In addition, since it has a relatively simple structure, it is easy to manufacture and saves manufacturing costs. Particularly, since the volume of the power supply core is small, the entire wireless power supply apparatus can receive less spatial constraints.

In addition, there is an effect that compatibility with the conventional power collecting apparatus can be improved.

1 is a perspective view showing a power collecting apparatus used in a conventional wireless power supply apparatus.
2 is a perspective view illustrating a feeding part of a wireless power supply apparatus according to an embodiment of the present invention.
3 is an end view of a power feeding core of a wireless power supply according to an embodiment of the present invention.
4 is a detailed view of a power supply core, a power supply coil, and a magnetic field line of a wireless power supply apparatus according to an embodiment of the present invention.
5 is a perspective view illustrating a feeding part and a current collecting part of a wireless power supply device according to an embodiment of the present invention.
Fig. 6 is an end view of the feeder and current collector shown in Fig. 5 viewed from the front. Fig.
7 is a perspective view illustrating a feeding part and a current collecting part of a wireless power supply apparatus according to an embodiment of the present invention.
Fig. 8 is an end view of the feeder and current collector shown in Fig. 7 viewed from the front; Fig.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

It should be noted that, in adding reference numerals to the constituent elements of the drawings, the same constituent elements are denoted by the same reference numerals even though they are shown in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

In describing the components of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected to or connected to the other component, It should be understood that an element may be "connected," "coupled," or "connected."

FIG. 2 is a perspective view illustrating a feeding unit 200 of a wireless power supply apparatus according to an embodiment of the present invention. FIG. 3 is a front view of a feeding core 220 of a wireless power supply apparatus according to an embodiment of the present invention. FIG. 4 is a detailed view of a power supply core 220, a power supply coil 230, and a magnetic field line of a wireless power supply apparatus according to an embodiment of the present invention. Hereinafter, the configuration and operation of the feeder 200 of the wireless power supply apparatus according to an embodiment of the present invention will be described with reference to FIGS. 2 to 4 together.

The feeding part 200 of the wireless power supply device includes a feeding core part 210 and a feeding coil 230. The power feeder 210 is configured to generate magnetic flux by receiving high frequency power from an inverter (not shown) connected to the power feeder 210 and includes a road surface (not shown) on which a vehicle (not shown) (Not shown) or a parking area (not shown), but the present invention is not limited thereto.

The power feeding core 210 includes a plurality of power feeding cores 220 arranged in a predetermined direction and arranged in parallel with each other with a predetermined width. Each power feeding core 220 includes a horizontal member 222 formed in a direction parallel to the bottom of a road surface (not shown), a railway surface (not shown) or a parking space area (not shown) And a vertical member 224 extending in a direction perpendicular to the horizontal member 222. [ The power supply core 220 is formed so that the length of the horizontal member 222 is longer than the length of the vertical member 224 and the vertical member 224 is disposed so as to be positioned at the widthwise edge But is not limited thereto.

The structure and operation of the feeder 200 of the wireless power supply apparatus according to an embodiment of the present invention will be described with reference to a case where the feed core 220 has a rectangular cross section, , The cross section of the power supply core 220 may be formed into a circular shape, an elliptical shape, a polygonal shape, and various other shapes as necessary. The material of the power supply core 220 is preferably ferrite which easily forms a magnetic field by electromagnetic induction, but is not limited thereto.

4, it is preferable, but not limited, that the power supply coil 230 is disposed on the upper portion of the horizontal member 222, but is disposed close to the vertical member 224. The structure and operation of the feeder 200 of the wireless power supply apparatus according to an embodiment of the present invention will be described with reference to an example in which one feeder coil 230 is disposed, A plurality of power supply coils 230 may be disposed in consideration of the size of the power required by the wireless power supply device and the size of the power supply core 210, or may be configured as a plurality of coil bundles. When a high frequency power is supplied to the power feeding coil 230 to generate a magnetic field, the magnetic force lines are formed in a direction perpendicular to the end faces 223 and 225 of the power feeding core 220.

5 is a perspective view illustrating a feeding part 200 and a current collecting part 500 of a wireless power supply device according to an embodiment of the present invention. FIG. 6 is a perspective view of a power feeding part 200 and a current collecting part 500 ) From the front. The power feeder 200 shown in FIG. 5 is the same as the power feeder 200 shown in FIG. 2 described above. The current collector unit 500 includes a current collector core unit 510 and a current collector coil 530. 5, the current collector 500 is disposed on the upper side of the feeder 200 so as to be magnetically coupled to the feeder 200 at a predetermined spacing.

The current collecting core portion 510 includes a plurality of current collecting cores 520 formed in a rod shape and arranged in a predetermined direction. The structure and operation of the current collector 500 of the wireless power supply device according to an embodiment of the present invention will be described by taking a case where the current collector core 520 has a rectangular cross section as an example, The end face of the current collector core 520 may be formed into a circular shape, an elliptical shape, a polygonal shape, and various other shapes as necessary. The material of the power collection core 220 is preferably ferrite which easily forms a magnetic field by electromagnetic induction, but is not limited thereto.

The current collecting coils 530 may be formed in a ring-like shape and disposed on both sides of the current collecting core portion 510 in the width direction so as to face the power feeder 200. The structure and operation of the current collector 500 of the wireless power supply apparatus according to an embodiment of the present invention will be described with reference to a case where two current collecting coils 530 are disposed at both ends of the current collecting core unit 510 However, this is only an example, and it is possible to appropriately select the number of the current collecting coils 530 arranged in consideration of the magnitude of the power required by the wireless power supply device and the size of the power collecting core portion 510. [

The magnetic field generated in the power supply core 220 forms a magnetic field in the current collector core 520, thereby generating an induced voltage in the current collector coil 5300. The generated induced voltage may be used as a driving force for driving a vehicle (not shown) or a battery (not shown) provided in a vehicle (not shown), but the present invention is not limited thereto.

 The power feeder 200 may be fixedly coupled to the ground and the power collector 500 may be mounted on a vehicle (not shown) to be movable in the longitudinal direction of the power feed core 210. In such a case, a vehicle (not shown) which requires a wireless power supply can receive power in a stationary state at a site where the power feeder 200 is installed, and can receive power continuously even when the vehicle (not shown) have.

The rod feed core 220 used in the wireless power supply according to an embodiment of the present invention has a shorter Magnetic Path Length (MPL) as compared with the rod feed core 11. This is because the power feeding core 220 is relatively small in structure and both end faces 223 and 225 where the magnetic field is mainly formed are located relatively close to each other, so that the distance in the space of the magnetic field formed between the end faces 223 and 225 is also shortened. The magnetic field formed in such a small range has a small magnetic flux attenuation. This is because the magnetic flux attenuation increases as the MPL increases. Since the power supply core 210 of the wireless power supply apparatus according to the embodiment of the present invention has a small flux loss, it is possible to reduce the core loss of the wireless power supply, There is an advantage that an induced voltage can be obtained.

In addition, the feeder 200 according to an embodiment of the present invention has a simple structure as compared with a wireless power supply apparatus having a different structure, so that the feeder 200 can be easily manufactured, So that the entire wireless power supply apparatus can receive less spatial constraints.

FIG. 7 is a perspective view showing a feeding part 200 and a current collecting part 700 of a wireless power supply device according to an embodiment of the present invention. FIG. 8 is a perspective view illustrating a power feeding part 200 and a current collecting part 700 ) From the front. The feeder 200 shown in Fig. 7 is the same as the feeder 200 shown in Fig. 2 described above. The current collector 700 includes a current collector core 710 and a current collector coil 730. 7, the current collector 500 is disposed on the upper side of the feeder 200 so as to be magnetically coupled to the feeder 200 at a predetermined interval.

The current collecting core portion 710 includes a current collecting base core 812 having a length and a predetermined width in the length and width direction of the power feeding core portion 210 and a current collecting base core 812 at both ends in the width direction of the current collecting base core 812 Side core 816 projecting in the same direction as the collecting side core 816 and perpendicular to the plane formed by the collecting core 812 and the collecting base core 812, (814). (Not shown) protruding in the width direction of the current collecting base core 812 may be provided at the end of the current collecting side core 816, but the present invention is not limited thereto. The structure and operation of the current collector 700 of the wireless power supply device according to an embodiment of the present invention will be described with reference to the case where the current collector core 710 has a rectangular cross-section. However, And the end face of the current collecting core portion 710 may be formed in various shapes such as a circle, an ellipse, a polygon, and a combination of shapes. The material of the current collector core 710 is preferably ferrite, which easily forms a magnetic field by electromagnetic induction, but is not limited thereto.

The current collecting coil 730 includes a central current collecting coil 732 and an external current collecting coil 734. A plurality of central collecting coils 732 may be provided and wound around the current collecting core 814. A plurality of outer side current collecting coils 734 may be provided and wound around the current collecting side core 816. The outside current collecting coils 734 may be configured to be wound in pairs on both side current collecting cores 816 according to the specification of the wireless power supply. The number of the central collecting coils 732 and the outer collecting coils 734 can be appropriately selected in consideration of the magnitude of the power required by the wireless power supply device and the size of the power collecting core portion 710 and the like.

The power feeder 210 may be fixedly coupled to the ground and the power collector 200 may be mounted on a vehicle so as to be movable in the longitudinal direction of the power feed core 211 of the feeder 210 . In this case, a vehicle (not shown) that requires wireless power supply can receive power in a stationary state at a site where the power feeder 210 is installed, and can receive power continuously even when the vehicle (not shown) have.

As a result of the experiment, it is assumed that the same current is applied to the feeder coil of the feeder 200 of the power feeder 100 according to the embodiment of the present invention and the power feeder 100 used in the conventional wireless power feeder shown in FIG. 1 1, the power-feeding device 100 supplies an induced voltage of 765 V and generates an average core loss of 59.25 W. In contrast, according to the current collector 700 of the wireless power supply apparatus according to the embodiment of the present invention, an induced voltage of 1.25 kV can be obtained. That is, one embodiment of the present invention can supply a relatively higher induced voltage than the power-saving device 100 of FIG.

In addition, the induced voltage by the current collector 500 of the wireless power supply according to an exemplary embodiment of the present invention is 747 V. It can be seen that the voltage is almost similar to 97% of the induced voltage supplied by the power-saving device 100 of FIG. That is, the power feeder 200 according to an embodiment of the present invention is compatible with the power collector of the power feeder 100 of FIG. Also, by confirming that a similar level of induced voltage is obtained in the same air gap as the E2bar type, EE type, and E2C type designed in the conventional KAIST, the feeder 200 according to one embodiment of the present invention is compatible with the conventional power collecting device of KAIST .

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them.

The description above is merely illustrative of the technical idea of the present invention and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas which are within the scope of the same should be interpreted as being included in the scope of the present invention.

200: Feeding part 500,700: Collecting part
210: power feeding core 220: power feeding core
230: Feeding coil part
510, 710: current collecting core 520: current collecting core
530,730: current collecting coil

Claims (16)

A pair of feed core portions formed by arranging a plurality of feed cores in a predetermined direction and being arranged parallel to each other with a predetermined width; And
The feeding coil part
And a power supply unit including the power supply unit. The method according to claim 1,
A power collecting core portion disposed to be spaced apart from one side of the feeding portion, the magnetic flux generated from the power feeding core portion passing through the power collecting core portion; And
A current collecting coil part
Wherein the power supply unit further comprises a current collecting unit. 3. The method of claim 2,
Wherein the power collecting core portion includes a plurality of bar-shaped power collecting cores formed in a predetermined direction. The method of claim 3,
Wherein the current-collecting coil portion includes a plurality of current-collecting coils wound in an annular shape and arranged on both sides in the width direction of the current-collecting core portion in a direction toward the feeder portion. 3. The method of claim 2,
Wherein the current collecting core portion includes a current collecting base core having a predetermined length and a predetermined width, a current collecting side core which is perpendicular to a plane formed by the current collecting base core at both side ends in the width direction and each protruding in the same direction, And a current collecting central core projecting in the same direction as the current collecting side core. 6. The method of claim 5,
Wherein the current collecting coil portion includes a plurality of current collecting coils wound around the current collecting central core or the current collecting side core. 6. The method of claim 5,
Wherein the power collecting core portion further includes a lateral protruding portion protruding in the width direction at an end of the collecting side core. The method according to claim 1,
The power feeding core is formed in an L shape including a horizontal member horizontally disposed on a plane formed by the power feeding core portion and a vertical member extending in a direction perpendicular to the horizontal member at one end of the horizontal member. Wireless power supply. 9. The method of claim 8,
Wherein the power feeding core is aligned in a direction perpendicular to a plane formed by the vertical core member. 10. The method of claim 9,
Wherein the power supply core is arranged such that the vertical member is positioned at the edge of the width. 11. The method of claim 10,
Wherein the power supply coil unit is disposed above the horizontal member. 11. The method of claim 10,
Wherein the power supply coil unit is disposed at an upper portion of the horizontal member, and is disposed at a portion where the horizontal member and the vertical member are connected. 3. The method of claim 2,
Wherein the power feeder is fixedly coupled to a ground, and the power collecting part is movable in a longitudinal direction of the power feeding core part. 3. The method of claim 2,
Wherein the power feeding unit is fixedly coupled to the ground, and the power collecting unit is coupled to the moving body. A power feeding device comprising: a pair of L-shaped power feeding cores arranged in parallel to each other with a predetermined width and arranged in parallel with each other; and a power feeding coil ;
A current collecting core portion having a plurality of rod-shaped current collecting cores arranged to be spaced apart from one side of the feeding portion and aligned in a predetermined direction, and a plurality of current collecting coils disposed in the current collecting core,
, ≪ / RTI &
Wherein the current-collecting coil is wound in an annular shape and is disposed at both end portions in the width direction of the current-collecting core portion in a direction toward the feed portion. A power feeding device comprising: a pair of L-shaped power feeding cores arranged in parallel to each other with a predetermined width and arranged in parallel with each other; and a power feeding coil ;
A current collecting base core disposed at a distance from one side of the power feeder, the current collecting base core having a predetermined length and a predetermined width; A current collecting core portion having a current collecting core portion protruding in the same direction as the current collecting side core at a central portion in the width direction and a current collecting portion having a current collecting coil portion wound around the current collecting core portion,
, ≪ / RTI &
Wherein the current collecting coil is wound on the current collecting central core or the current collecting side core.

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