KR101997483B1 - Wireless power transmission apparatus using railroad train - Google Patents

Abstract

A wireless power transmission apparatus using a railway vehicle is disclosed. A wireless power transmission apparatus using a railway vehicle according to the present invention includes: a conductor rod installed inside a railway vehicle formed by a conductor and transmitting power to a receiver inside the railway car by radio; A resonance capacitor provided in the conductor rod for storing energy due to an electric field in resonance and adjusting a resonance frequency; A transmission power source for transmitting AC power; And a feeding part for transmitting electric power to the conductor rod by a current outputted from the transmission power source, wherein a part of the conductor rod is transmitted, and the resonance capacitor is installed at a cut part of the conductor rod.

Description

[0001] WIRELESS POWER TRANSMISSION APPARATUS USING RAILROAD TRAIN [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a wireless power transmission apparatus using a railway vehicle, and more particularly, to a wireless power transmission apparatus using a railway vehicle that simultaneously charges a plurality of receivers in a railway vehicle wirelessly.

With the increasing use of mobile devices by people, there is a growing demand for technologies to conveniently charge the battery.

Wireless charging is very convenient because you can charge without having to wire the device directly.

However, the induction method and the resonance method, which are the conventional wireless charging techniques, use a magnetic field coupling of a coil, and since they have a short transmission distance of several centimeters or less, practically, they can not completely overcome the limitations of a wire.

Another wireless charging method, the radio-wave wireless charging method, is capable of transmitting power to a long distance, but it can transmit and receive very little power due to EMI, human safety and low efficiency.

That is, the conventional induction method and the resonance method have a limitation on a short transmission distance, and the radio-wave type wireless charging method can transmit and receive only a small amount of power, so that it is difficult to apply in a general environment.

The background art of the present invention is disclosed in Korean Patent No. 10-1367342 (Apr. 29, 2014), entitled " Wireless charging system equipped with local wireless communication function ".

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a method and apparatus for generating a magnetic field resonating inside a railway car, The present invention provides a wireless power transmission apparatus using a railway vehicle that simultaneously charges a plurality of receivers.

It is another object of the present invention to provide a wireless power transmission apparatus using a railway vehicle capable of freely installing and disassembling a device for charging a mobile device since a mobile device of a user can be charged by using a railway vehicle .

According to an aspect of the present invention, there is provided a wireless power transmission apparatus using a railway vehicle, the wireless power transmission apparatus comprising: a conductor rod installed inside a railway vehicle formed by a conductor and transmitting power to a receiver inside the railway car; A resonance capacitor provided in the conductor rod for storing energy due to an electric field in resonance and adjusting a resonance frequency; A transmission power source for transmitting AC power; And a feeding part for transmitting electric power to the conductor rod by a current outputted from the transmission power source, wherein a part of the conductor rod is transmitted, and the resonance capacitor is installed at a cut part of the conductor rod.

The conductive rods of the present invention are characterized in that at least one of the conductive rods is installed in the longitudinal direction or the width direction of the railway car.

The conductor bar of the present invention is characterized in that both sides of the conductor bar are connected to two surfaces of the plurality of surfaces of the railway car opposite to each other.

The power supply unit of the present invention includes a resonance coil that excites the conductor rod to a magnetic field coupling by resonance caused by a current output from the transmission power source.

The resonance coil of the present invention is characterized in that the direction of the magnetic field coincides with the direction of the magnetic field formed by the conductor bar.

The resonance coil of the present invention is installed within a predetermined set distance from the conductor rod according to the intensity of a magnetic field formed by the conductor rod.

The resonant coil of the present invention is characterized in that it includes at least one of a helical coil, a spiral coil, and a Trojan coil.

According to another aspect of the present invention, there is provided a wireless power transmission apparatus using a railway vehicle, including: a transmission power source for transmitting AC power; A conductor rod installed inside a railway vehicle formed by a conductor and adapted to transmit power to a receiver inside the railway car in accordance with a current supplied from the transmission power source; And a resonance capacitor having one side connected to the transmission power source and the other side connected to the conductor rod to store energy by an electric field in the resonance and to control the resonance frequency.

The conductor rod of the present invention is separated into a first separating conductor bar and a second separating conductor bar, the first separating conductor bar being connected to the output terminal of the transmission power source through the resonance capacitor, And an output terminal.

The conductive rods of the present invention are characterized in that at least one or more of the conductive rods are arranged in the longitudinal direction or the width direction of the railway car.

The conductor bar of the present invention is characterized in that both sides of the conductor bar are connected to two surfaces of the plurality of surfaces of the railway car opposite to each other.

A wireless power transmission apparatus using a railway vehicle according to an aspect of the present invention forms a magnetic field that resonates in the entire interior of a railway vehicle by allowing a current to flow through a conductor rod inside a railway vehicle, It can be charged.

According to another aspect of the present invention, a wireless power transmission apparatus using a railway vehicle uses a railway vehicle, so that the charging range is very wide and many mobile devices can be charged at the same time.

A wireless power transmission apparatus using a railway vehicle according to another aspect of the present invention can adjust a resonance frequency using a resonant capacitor, and thus can be compatible with a mobile device conforming to a commercially available Qi or Airfuel standard.

The wireless power transmission apparatus using the railway vehicle according to another aspect of the present invention can realize power supply to the mobile device inside the railway vehicle without worrying about wire connection by wireless power transmission, And disassembly is very free.

In accordance with another aspect of the present invention, a wireless power transmission apparatus using a railway vehicle can charge a mobile device while minimizing external influences because electric energy, which can be affected by a human body or most objects, is concentrated in a resonance capacitor at resonance .

1 is a block diagram of a wireless power transmission apparatus using a railway vehicle according to a first embodiment of the present invention.
2 is a conceptual diagram illustrating current flow and magnetic field formation of a railway vehicle according to a first embodiment of the present invention.
3 is a view showing an example of a conductor rod according to the first embodiment of the present invention.
4 is a view showing another example of the conductor rod according to the first embodiment of the present invention.
5 is a view showing still another example of the conductor rod according to the first embodiment of the present invention.
6 is a configuration diagram of a wireless power transmission apparatus using a railway vehicle according to a second embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, a radio power transmission apparatus using a railway vehicle according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation. Further, the terms described below are defined in consideration of the functions of the present invention, which may vary depending on the user, the intention or custom of the operator. Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a configuration diagram of a wireless power transmission apparatus using a railway vehicle according to a first embodiment of the present invention. FIG. 2 conceptually shows current flow and magnetic field formation of a railway vehicle according to the first embodiment of the present invention 4 is a view showing another example of the conductive rod according to the first embodiment of the present invention, and FIG. 5 is a cross-sectional view of the conductive rods according to the present invention Fig. 5 is a view showing another example of the conductor rod according to the first embodiment of Fig.

1, a wireless power transmission apparatus for a railway vehicle according to an embodiment of the present invention includes a plurality of receivers 60 inside a railway vehicle 10 using an outer frame of a railway vehicle 10 as a resonance cavity, The conductor rod 20, the resonant capacitor 30, and the power supply 50 by wirelessly transmitting electric power to the transmission power supply 50, the plurality of receivers 60 in the wide range within the railway car 10, (40).

For reference, the receiver 60 is a device capable of receiving power from the conductor rod 20 by radio, and the receiver 60 may be a mobile device capable of wireless charging.

Here, the resonance cavity resonates at a specific resonance frequency (Eigen frequency) derived from a structural characteristic, such as a cylinder shape or a hexahedral shape, the outside being surrounded by a conductor and the inside being empty or filled with a dielectric.

The resonance cavity has many resonance frequencies according to the resonance mode (mode), and the quality coefficient and the like are different in each mode. When the resonant cavity is used, the probe is placed and excited so that a desired mode can be formed therein.

In the wireless power transmission using the cavity resonance, a modified resonant cavity in which the conductor rod 20 connected to the resonant capacitor 30 is coupled may be used in the resonant cavity. Therefore, the resonance mode is deformed by the conductor rod 20, and the resonance frequency can be adjusted through the connection of the resonance capacitor 30. [

Particularly, in the case of the resonance cavity having a hexahedral structure such as the railway car 10, in the resonance mode, as shown in Fig. 2, the current on the outer wall surface of the railway car 10 is poured into the conductor rod 20, 20), and the magnetic field is rotated according to the right-hand rule.

Since electric energy is concentrated in the resonance capacitor 30 during resonance, only the magnetic energy exists mostly within the resonance cavity structure. At this time, the intensity of the current flowing through the conductor rod 20 becomes constant in the longitudinal direction. Therefore, a relatively uniform magnetic field is formed throughout the cavity space. In this case, the magnetic field increases as the distance from the conductor rod 20 increases, and decreases as the distance increases from the conductor rod 20, that is, toward the wall surface. According to this principle, in the resonance mode, the magnetic field energy is distributed in the space inside the resonance cavity and electric power can be transmitted to the receiver 60 capable of collecting the energy.

That is, in order to perform wireless power transmission using the resonant cavity, the resonant cavity must first be resonated and the energy stored therein.

To this end, the wireless power transmission apparatus using the railway vehicle according to the first embodiment of the present invention uses an excitation method using a magnetic field coupling using a resonance coil in a resonance cavity.

Here, the railway car 10 can be utilized as a resonance cavity of a hexahedron having a long side. The outer frame of the railway car 10 is utilized as a resonance cavity.

The transmission power source 50 transmits AC power. The transmission power source 50 transmits AC power having a resonance frequency to the power feeder 40 so that the power feeder 40 can resonate inside the railway car 10.

The power feeder 40 transmits electric power to the conductor bar 20 by the current output from the transmission power source 50.

That is, the feeder 40 includes a resonant coil that excites the conductor rod 20 by magnetic field coupling by resonance based on the current output from the transmission power source 50.

The resonant coil is composed of a helical coil wound in a cylindrical shape so as to have the same diameter, a spiral coil wound to gradually increase or decrease in diameter on the same plane, and a donut-shaped coil wound around a core (magnetic core or plastic core) And a Trojan coil.

Since the resonance coil varies in magnetic field coupling degree depending on the size and the distance from the conductor bar, the maximum amount of power that can be collected depends on the size and the distance from the conductor rod. Accordingly, the resonance coil can be manufactured in various sizes in consideration of the overall transmission characteristics such as the maximum power amount and efficiency, and the distance from the conductor rod can be appropriately adjusted.

The resonance coil is disposed so that its magnetic field direction coincides with the direction of the magnetic field formed by the conductor bar 20 and is set within a predetermined set distance from the conductor bar 20 in accordance with the strength of the magnetic field formed by the conductor bar 20 Respectively.

Normally, the magnetic field formed by the conductor bar 20 is relatively strong near the conductor bar 20, so that it is advantageous that the resonance coil is installed at a position relatively close to the conductor bar 20. Therefore, the resonance coil can be installed within a predetermined set distance from the conductor rod 20, depending on the strength of the magnetic field formed by the conductor rod 20. [

That is, at least one of the helical coil, the spiral coil, and the Troy month coil may be employed as described above, and the magnetic field direction thereof is arranged to coincide with the magnetic field direction formed by the conductor bar 20, (20).

The conductor bar 20 is connected to the inside of the railway car 10 through a resonance capacitor 30 and wirelessly transmits electric power to the receiver 60 inside the railway car 10. That is, the conductor rod 20 flows a current through the outer wall of the railway car 10 and forms a magnetic field in accordance with the right-hand rule.

Here, since the resonance capacitor 30 is installed in the conductor rod 20 and stores the electric energy in the resonance, only the magnetic energy is present in the railway vehicle 10, and the external influence by the electric energy can be minimized. This resonance capacitor 30 may adjust the resonance frequency. Here, a part of the conductor rod 20 is cut, and a resonance capacitor 20 is installed in the portion where the conductor rod 20 is transmitted.

The conductive rods 20 are formed in a straight line and connected to two surfaces arranged in directions opposite to each other among the six surfaces of the railway car 10. The conductive rods 20 are arranged in the longitudinal direction or in the width direction of the railway car 10, Can be arranged.

Typically, the railway car 10 is provided on both sides with a pull bar supporting the handle 12 for standing passengers. Thus, the handle bar can be replaced with the conductor bar 20. [

That is, when the resonance capacitor 30 is connected to the handle support rod and the handle support rods are attached to both wall surfaces of the railway car 10, the resonance cavity resonance occurs due to the flow of current during resonance. As shown in FIG. 3, the handle bar can be utilized as the conductor bar 20 by deforming the handlebar support rod already provided in the railway car 10 into a form capable of forming cavity resonance.

In this case, the current flowing in one conductor rod 20 is dispersed and the two conductor rods 20 are connected to the conductor rods 20, And the shape and intensity of the magnetic field inside it can be partially changed depending on the position of the conductor bar 20, but the overall shape does not change.

On the other hand, even if the pull rod is used as the conductor rod 20, the handle 12 held by the passenger is connected to the conductor rod 20 by an insulator, so that the risk of the passenger can be minimized. In addition, since the insulating sheath can be applied to the conductor bar 20, there is no danger of electric shock and the conventional handle 12 can be used as it is. Therefore, resonant cavity radio power transmission using the railway vehicle 10 is possible by such modified resonance cavity modeling.

Fig. 4 shows an example in which the conductor bar 20 is vertically installed at the center of the railway car 10. Fig.

Referring to FIG. 4, since a magnetic field is formed when a current flows through the conductor bar 20, power can be wirelessly transmitted to the receiver 60 inside the railway vehicle 10. In this case, for the safety of passengers, the insulating rods may be applied to the conductor rods 20 as described above.

Fig. 5 shows an example in which the conductor bar 20 is installed in the longitudinal direction of the railway car 10. Fig. In other words, as shown in FIG. 3, the conductive rod 20 is additionally provided in the longitudinal direction without using the conventional pull rod, so that the conductive rod 20 is replaced with the conductive rod 20, Can be formed.

Although not shown in the drawings, it is also possible to provide the conductor rods 20 in the width direction of the railway car 10. [

Meanwhile, the wireless power transmission apparatus using the railway vehicle according to the first embodiment of the present invention uses a method using magnetic field coupling using a resonant coil.

However, a method of resonating the cavity includes a method in which a conductor rod 20 is installed in a railway vehicle 10 and a resonance capacitor 30 is connected to one of the output ends of the transmission power source 50 to connect the conductor rod 20 Can also be used. This will be described with reference to FIG.

6 is a configuration diagram of a wireless power transmission apparatus using a railway vehicle according to a second embodiment of the present invention.

Referring to FIG. 6, a wireless power transmission apparatus for a railway vehicle according to a second embodiment of the present invention includes a transmission power source 50, a resonant capacitor 30, and a conductor rod 20.

In the second embodiment of the present invention, the same parts as those in the first embodiment are not described in detail.

The transmission power source 50 transmits AC power. That is, the transmission power source 50 applies a current having a resonance frequency to the conductor bar 20. [

The resonance capacitor 30 has one side connected to the transmission power source 50 and the other side connected to the conductor rod 20 so that electric energy is stored in the resonance capacitor 30 so that only magnetic energy exists in the railway vehicle 10. Also, the resonance capacitor 30 can adjust the resonance frequency.

The conductor rod 20 is installed inside a railway vehicle 10 formed of a conductor and wirelessly transmits electric power to the receiver 60 inside the railway car 10 according to the electric current supplied from the transmission power source 50.

The conductive rods 20 according to the second embodiment of the present invention are separated into the first conductive rods 21 and the second conductive rods 22 so that the first conductive rods 21 are separated from the railroad cars 10 And the first separating conductive bar 21 may be installed on a wall surface opposite to a wall surface to which the first separating conductive bar 21 is connected.

The first separating conductor bar 21 is connected to the output terminal of the transmission power source 50 through the resonance capacitor 30 and the second separating conductor bar 22 is connected to the remaining output terminal of the transmission power source 50. The resonant capacitor 30 may be connected in series with the first separator bar 21 in parallel.

The mounting position and structure of the conductor bar 20 can be applied in the same manner as in the first embodiment.

That is, at least one or more conductor rods 20 may be arranged in the longitudinal direction or the width direction of the railway car 10. [ In this case, when a plurality of conductor rods 20 are provided, the respective conductor rods 20 are connected in parallel.

Also, the conductor rod 20 can be replaced with a conventional handle bar as in the first embodiment. The conductor bars 20 may be connected to two sides of the six sides of the railway car 10 facing each other.

As described above, in the wireless power transmission apparatus using the railway vehicle according to the embodiment of the present invention, the electric current flows to the conductor rod 20 inside the railway vehicle 10, The plurality of receivers 60 in a wide range within the railway car 10 can be charged simultaneously.

In addition, since the resonant frequency can be adjusted by using the resonant capacitor 30, the wireless power transmission apparatus using the railway vehicle according to the embodiment of the present invention is compatible with the mobile devices conforming to the commercially available Qi and Airfuel standards It is possible.

In addition, since a wireless power transmission apparatus using a railway vehicle according to an embodiment of the present invention can implement power to the receiver 60 inside the railway vehicle 10 without worrying about wire connection, 60 can be installed and disassembled very freely, and the external energy can be minimized because the electric energy, which can be influenced by the human body and most objects, is concentrated in the resonance capacitor 30 at the time of resonance.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, I will understand. Accordingly, the true scope of the present invention should be determined by the following claims.

10: Railway vehicles
12: Handle
20: conductor rod
21: first separating conductor rod
22: second separating conductor rod
30: Resonant capacitor
40:
50: Transmission power source
60: receiver

Claims (11)

A conductor rod installed inside a railway vehicle formed by a conductor and transmitting power to a receiver inside the railway car by radio;
A resonance capacitor provided in the conductor rod for storing energy due to an electric field in resonance and adjusting a resonance frequency;
A transmission power source for transmitting AC power; And
And a power feeder for transmitting electric power to the conductor rod by a current outputted from the transmission power source,
A portion of the conductor rod is cut, the resonance capacitor is provided at a cut portion of the conductor rod,
The plurality of conductor rods are installed in the longitudinal direction or the width direction of the railway car,
Wherein the conductor rods are connected to two sides of the plurality of surfaces of the railway car opposite to each other.
delete delete The wireless power transmission apparatus using a railway vehicle according to claim 1, wherein the power feeding section includes a resonance coil for exciting the conductor rod to a magnetic field coupling by resonance based on a current output from the transmission power source.
5. The wireless power transmission apparatus using a railway vehicle according to claim 4, wherein the resonance coil is arranged so that a magnetic field direction coincides with a magnetic field direction formed by the conductor bar.
5. The wireless power transmission apparatus using a railway vehicle according to claim 4, wherein the resonance coil is installed within a predetermined set distance from the conductor rod in accordance with the intensity of the magnetic field formed by the conductor rod.
The apparatus of claim 4, wherein the resonant coil includes at least one of a helical coil, a spiral coil, and a Troy month coil.
A transmission power source for transmitting AC power;
A conductor rod installed inside a railway vehicle formed by a conductor and adapted to transmit power to a receiver inside the railway car in accordance with a current supplied from the transmission power source; And
And a resonance capacitor which is connected to one end of the transmission power source and the other end of which is connected to the conductor rod to store energy by an electric field when the resonance occurs and to adjust the resonance frequency,
Wherein a plurality of the conductor rods are arranged in the longitudinal direction or the width direction of the railway car,
Wherein the conductor rods are connected to two sides of the plurality of surfaces of the railway car opposite to each other.
9. The method of claim 8, wherein the conductor bar is separated into a first separating conductor bar and a second separating conductor bar, the first separating conductor bar being connected to the output terminal of the transmission power source through the resonance capacitor, And is connected to the other output terminal of the power source.
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