KR101629166B1 - Power supply system for vehicle using a semiconductor switching device - Google Patents

Abstract

A power supply system for an electric vehicle using a semiconductor switching device includes a gate electrode plate, a feed cable, a current collecting plate, and a switching device. The gate electrode plate is buried in the ground, and one surface exposed to the outside receives gate power. The feed cable is buried in the ground and supplies high-voltage power. The current collector plate is buried in the ground and provides current to one surface exposed to the outside. The switching element is electrically driven according to a gate power supplied from the gate electrode plate, and provides a high voltage power supplied from the power supply cable to the current collecting plate.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a power supply system for an electric vehicle using a semiconductor switching device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply system for an electric vehicle, and more particularly, to a power supply system for an electric vehicle for supplying electric power to an electric vehicle by using a semiconductor switching device.

Most of the trams which are installed on the road and pass through the city center mainly include a pantograph for electric power supply being located at the upper part of the railway car and the electric lines for supplying electric power to the pantograph are connected to the trams As shown in FIG. As a result, there is a problem of not only damaging the aesthetics of the city but also exposing it to the risk of safety accidents due to a high-voltage electric cable.

Accordingly, in recent years, there has been developed a unmanned railway tram that omits the pantograph and tram lines, and in Korean Patent Application No. 10-2011-0100367, a battery car is included in a low-elevation tram, Discloses a technique for a low-floor low-floor tram.

On the other hand, in the case of an electric vehicle that uses electric power as a propulsion power as well as a railway vehicle such as the above tram, in addition to mounting the above-mentioned large capacity battery for receiving electric power, A technique of supplying electric power through a non-contact power feeding technique by induction feeding through electromagnetic induction with a current collecting coil installed in a vehicle, in which a high frequency electric wire or a coil is embedded in a lower portion and a magnetic field is generated, 10-2010-0048495.

However, in the case of the electric power supply system for an electric vehicle developed up to now, there are problems such as restriction of the running time or limitation of the speed due to the recharging of the battery and the limitation of the battery output, etc., There are problems such as limitation of the internal space of the vehicle due to mounting of the battery and increase of the vehicle weight.

In addition, when a power supply system is installed on a ground or a road, the installation cost of the system increases, and in particular, there is a problem that the risk of a safety accident of a vehicle or a person passing through the ground or a road increases.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a power supply system for an electric vehicle in which sufficient electric power is supplied for operation,

According to an embodiment of the present invention, an electric power supply system for an electric vehicle includes a gate electrode plate, a feed cable, a current collecting plate, and a switching device. The gate electrode plate is buried in the ground, and one surface exposed to the outside receives gate power. The feed cable is buried in the ground and supplies high-voltage power. The current collector plate is buried in the ground and provides current to one surface exposed to the outside. The switching element is electrically driven according to a gate power supplied from the gate electrode plate, and provides a high voltage power supplied from the power supply cable to the current collecting plate.

In one embodiment, the electric power supply system for an electric vehicle includes a gate power supply part attached to a bottom surface of a vehicle part to supply the gate power to the gate electrode plate, and a power supply part attached to a bottom surface of the vehicle part, And collecting electric power required to drive the vehicle section.

In one embodiment, the gate electrode plate, the feed cable, and the current collector plate may be insulated from each other by an insulating layer buried in a lower portion of the ground.

In one embodiment, the gate electrode plate and the current collector plate may extend parallel to each other along the traveling direction of the vehicle portion.

In one embodiment, the gate electrode plate and the current collecting plate may be spaced apart from each other according to the traveling direction of the vehicle portion, and one length of the gate electrode plate and the current collecting plate may be shorter than the length of the vehicle portion .

In one embodiment, the switching device may be installed such that one switching element is connected to the one gate electrode plate and the one current collecting plate.

In one embodiment, the switching element is electrically short-circuited when the gate power is supplied to provide the high-voltage power to the current collecting plate. When the supply of the gate power is interrupted, the switching element is electrically insulated, It may not be provided as a full version of the house.

In one embodiment, the switching device includes a gate metal layer electrically connected to the gate electrode plate, an emitter electrically coupled to the feed cable, a collector electrically coupled to the collector plate, First and second semiconductor layers formed between the collector and the gate electrode layer, and a gate insulating layer formed between the gate metal layer and the first semiconductor layer.

In one embodiment, the gate electrode plate and the current collector plate may include a metal material having a high electrical conductivity.

According to the embodiments of the present invention, power can be supplied to the electric vehicle through the gate electrode plate embedded in the ground, the power supply cable, the current collecting plate, and the switching device. Therefore, a dust collecting device such as a separate pantograph, Stable power supply is possible without using.

Particularly, the gate electrode plate, the feed cable, and the current collecting plate are buried on the ground by the insulating layer. When the vehicle does not pass through, the current does not flow to the exposed portion, so that the safety of the pedestrian and other vehicles is secured.

In this case, by embedding the length of the gate electrode plate and the current collecting plate shorter than the length of the vehicle portion, even if a current flows in the passage of the vehicle, the gate electrode plate and the current collector plate, The safety of a pedestrian or other vehicle can be secured.

Further, since the gate power supply unit and the current collecting unit are attached to the bottom surface of the vehicle for power supply and power supply to the buried gate electrode plate and the current collecting plate, it is possible to stably collect electricity according to the operation of the vehicle unit through a relatively simple structure Do.

Particularly, since the gate electrode plate and the current collecting plate extend in parallel with each other along the traveling direction of the vehicle portion, stable current collection can be performed irrespective of changes in the running direction of the vehicle portion or the lane.

Particularly, by applying a switching element which is electrically connected only when a gate voltage is provided, power can be supplied stably when the vehicle is passed, and also, when the vehicle does not pass, Can be improved.

1 is a conceptual diagram showing a power supply system for an electric vehicle according to an embodiment of the present invention.
2 is a perspective view showing a power supply system for an electric vehicle of FIG. 1;
FIGS. 3A and 3B are schematic diagrams for explaining a power supply principle of a switching element in the electric power supply system for an electric vehicle of FIG. 1. FIG.
FIG. 4 is a schematic diagram of applying a power supply principle of a switching element to the electric power supply system for an electric vehicle of FIG. 1;

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing. The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms.

The terms are used only for the purpose of distinguishing one component from another. The terminology used in this application is used only to describe a specific embodiment and is not intended to limit the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise.

In the present application, the term "comprises" or "comprising ", etc. is intended to specify that there is a stated feature, figure, step, operation, component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

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

1 is a conceptual diagram showing a power supply system for an electric vehicle according to an embodiment of the present invention. 2 is a perspective view showing a power supply system for an electric vehicle of FIG. 1;

1 and 2, a power supply system 10 for an electric vehicle according to the present embodiment includes a gate power supply unit 110, a current collector 120, a gate electrode plate 200, a current collector plate 300, Device 400 and a feed cable 500. [

2, a second gate electrode plate 202, a second current collecting plate 302, and a second switching device 420, which are located on the bottom surface 101 of the vehicle unit 100 and are electrically connected to the vehicle unit 100, ). In the following, another gate electrode plate, a current collecting plate, and a switching element form the same electrical connection relationship as shown in FIG.

The gate power supply unit 110 and the current collector 120 are attached to the bottom surface 101 of the vehicle unit 100 and the gate power supply unit 110 and the current collector unit 120 are connected to the vehicle unit 100, And are spaced apart from each other by a predetermined distance.

The gate power supply 110 is electrically connected to a gate metal layer of the switching device 400, which will be described later, to provide a voltage to the gate metal layer. In this way, when the gate power supply unit 110 provides a voltage to the gate metal layer, the switching device 400 is turned on.

For this, the gate power supply unit 110 may be connected to a voltage source that can induce the ON state of the switching device 400, and the voltage source may be disposed inside the vehicle unit 100.

The gate power supply unit 110 includes a power supply connection unit 111 and a power supply surface 112. The power supply connection unit 111 is connected to the bottom surface 101 of the vehicle unit 100, The supply surface 112 contacts the gate electrode plate 200 and moves along the upper surface of the gate electrode plate 200 as the vehicle 100 moves.

The current collector 120 is electrically connected to a collector of the switching device 400 so that current is supplied to the switching device 400 when the switching device 400 is ON. The current collected by the current collector 120 may be used as electric power for driving the vehicle unit 100.

The current collector 120 includes a current collecting connection part 121 and a collecting surface 122. The current collecting connection part 121 is connected to the bottom surface 101 of the vehicle part 100, Contact with the current collecting plate 300 and move along the upper surface of the current collecting plate 300 according to the movement of the vehicle unit 100.

The gate electrode plate 200 includes a plurality of first, second, third, ... gate electrode plates 201, 202, 203, ..., Spaced apart.

Each of the gate electrode plates is embedded in the ground 20 and extends in the moving direction of the vehicle unit 100 so as to face the bottom surface 101 of the vehicle unit 100.

The plurality of gate electrode plates 201, 202, 203, ... are arranged on the ground surface 20 to face the bottom surface 101 of the vehicle unit 100 along the moving direction of the vehicle unit 100. [ , Each of which is spaced apart by a predetermined distance and intermittently extended.

In this case, the extension length of the one gate electrode plate is shorter than the extension length of the vehicle unit 100. Thus, the specific gate electrode plate where the vehicle unit 100 is located and electrically connected to the vehicle unit 100 is not exposed to the outside of the vehicle unit 100.

That is, as described later, since a high-voltage current flows through the specific gate electrode plate electrically connected to the vehicle unit 100, safety accidents such as pedestrians and other vehicles may occur when the vehicle unit 100 is exposed to the outside, Is formed to be shorter than the length of the vehicle unit 100 so that it is always positioned on the bottom surface 101 of the vehicle unit 100 and is prevented from being exposed to the outside.

Meanwhile, the gate electrode plate 200 is buried on the ground 20, and the portion where the gate electrode plate 200 is buried is insulated by the insulating layer 30. That is, the gate electrode plate 200 is buried by the insulating layer 30 under the ground 20.

The exposed surface of the gate electrode plate 200 is directed toward the bottom surface 101 of the vehicle unit 100 and the surface of the vehicle unit 100 is exposed. As shown in Fig.

The gate electrode plate 200 may be formed of a material having high electrical conductivity, for example, copper or aluminum.

2, when the vehicle unit 100 passes over the power supply face 112 of the gate power supply unit 110, the second gate electrode plate 202 is moved in contact with the power supply face 112 of the gate power supply unit 110 . Thus, the gate power is supplied from the gate power supply unit 110, and the gate power supplied to the gate power supply unit 110 is supplied to the gate metal layer of the switching device 400 to switch the switch device to the ON state.

The current collecting plate 300 also includes a plurality of first, second, third, ... collectors 301, 302, 303, ..., each of which is spaced apart Respectively.

Each of the current collecting plates is embedded in the ground 20 and extends in the moving direction of the vehicle unit 100 so as to face the bottom surface 101 of the vehicle unit 100.

The plurality of current collecting plates 301 are arranged on the ground surface 20 so as to face the bottom surface 101 of the vehicle unit 100 along the moving direction of the vehicle unit 100, And each of them is spaced apart by a predetermined distance and is intermittently extended.

In this case, each of the current collectors is spaced apart from the gate electrode plates by a predetermined distance in a direction perpendicular to the moving direction of the vehicle unit 100 and arranged in parallel with each other, and the current collectors are spaced apart from each other The distance is the same as the spacing distance between the gate electrode plates. That is, each of the current collecting plates and the gate electrode plates are equally arranged in pairs.

Therefore, the extension length of the one current collector plate is formed to be shorter than the extension length of the vehicle section 100. Thus, the specific collector plate, on which the vehicle section 100 is positioned and electrically connected to the vehicle section 100, is not exposed to the outside of the vehicle section 100.

As described above, when the current collecting plate is electrically connected to the vehicle unit 100 as in the case of the gate electrode plate, a high voltage current flows. Therefore, when exposed to the outside, a safety accident such as a pedestrian or other vehicle may occur A specific collecting plate electrically connected to the vehicle unit 100 is formed to be shorter than the length of the vehicle unit 100 so that it is always positioned on the bottom surface 101 of the vehicle unit 100 and is not exposed to the outside prevent.

 The current collecting plate 300 is also embedded on the ground 20 and the portion where the current collecting plate 300 is embedded is insulated by the insulating layer 30. That is, the current collecting plate 300 is also buried by the insulating layer 30 below the ground 20.

The current collector plate 300 is embedded on the ground surface 20 so that one surface is exposed and the exposed surface is directed toward the bottom surface 101 of the vehicle body 100, And extend along the moving direction.

The current collecting plate 300 may be formed of a material having high electrical conductivity, for example, copper or aluminum.

As shown in FIG. 2, when the vehicle unit 100 passes the upper part, the collecting surface 120 of the collecting unit 120 contacts the second collecting plate 302 and moves. The high voltage current supplied from the power supply cable 500 is supplied to the current collector 120 through the switching device 420 and is supplied to the current collector 120 to drive the vehicle 100. [ Or as a power source for operation.

The switching element 400 also includes a plurality of first, second, third, ... switching elements 410, 420, 430, ..., And each of the current collecting plates.

Each of the switching elements may be buried in the ground 20, such as the gate electrode plates and the current collectors, or alternatively, may be embedded in the gate electrode plates and the current collectors Or may be disposed adjacent to each other.

The detailed configuration and connection relationship of the switching elements will be described later.

The feed cable 500 is embedded in the paper surface 20 and extends along the traveling direction of the vehicle unit 100. As shown in FIG. 2, the feed cable 500 is embedded to be insulated by the insulating layer 30, and a high-voltage current flows through the feed cable 500, so that the feed cable 500 It is preferable to be buried so as to be located deeply from the ground.

Since the feed cable 500 is not exposed to the outside through the ground 20 like the gate electrode plate 200 or the current collector plate 300, the feed cable 500 need not be formed intermittently. Are continuously buried to supply power.

The feed cable 500 is electrically connected to an emitter of the switching device 400 so that when the switching device 400 is electrically driven, ) To provide a high voltage current.

FIGS. 3A and 3B are schematic diagrams for explaining a power supply principle of a switching element in the electric power supply system for an electric vehicle of FIG. 1. FIG. FIG. 4 is a schematic diagram of applying a power supply principle of a switching element to the electric power supply system for an electric vehicle of FIG. 1;

2, 3A, 3B and 4, the second switching device 420 includes a gate connection part 421, a gate metal layer 422, an emitter connection part 423, an emitter 424 A collector connecting portion 425, a collector 426, and a gate insulating layer 427,

In this embodiment, the gate metal layer 422 of the second switching device 420 is electrically connected to the second gate electrode plate 202 through the gate connection 421, And receives gate power from the gate power supply unit 110 that is in contact with the upper surface of the gate electrode 202.

That is, when the gate voltage is applied from the gate power supply unit 110, the second switching device 420 is turned on. When the application of the gate voltage is completed, the second switching device 420 is turned off do.

The emitter 424 is electrically connected to the feed cable 500 through the emitter connection part 423 and the collector 426 is connected to the collector connection part 425 through the collector connection part 425. [ 2 collector plate 302 of the first embodiment.

The second switching element 420 includes a first semiconductor layer 428 and a second semiconductor layer 429. As shown in the figure, the first semiconductor layer 428 includes a P-type semiconductor, The second semiconductor layer 429 may be composed of an N-type semiconductor. The second switching device 420 may be an N-P-N type semiconductor structure in which the second semiconductor layer 429 is superimposed on both sides of the first semiconductor layer 428.

Alternatively, the second switching element may be a P-N-P type semiconductor structure.

That is, as described above, the second switching device 420 may be, for example, an insulated gate bipolar transistor (IGBT) or a metal oxide semiconductor field effect transistor (MOSFET), which is a typical semiconductor switching device.

A gate insulating layer 427 for insulation is formed between the gate metal layer 422 and the first and second semiconductor layers 428 and 429.

Thus, when the second switching device 420 is turned ON, a high voltage current supplied from the power supply cable 500 is supplied to the first and second semiconductor layers 428 and 429 through the first and second semiconductor layers 428 and 429, The electric current is supplied to the front plate 302 and is collected through the current collector 120 moved in contact with the upper surface of the second current collector plate 302 and used as electric power for driving or operating the vehicle unit 100 .

Meanwhile, in this embodiment, since the first, second, third,... Switching elements each have the same structure, operation and connection relationship, the description of the second switching element Is omitted.

As described above, the gate power supply unit 110 and the current collector 120 are brought into contact with the N-th gate electrode plate and the N-current collector plate, respectively, while the vehicle unit 100 moves along the ground, Thus, the Nth switching element performs necessary driving.

According to the embodiments of the present invention as described above, electric power can be supplied to the electric vehicle through the gate electrode plate, the feed cable, the current collecting plate, and the switching device embedded in the ground. Therefore, It is possible to supply stable power without using a battery or the like.

Particularly, the gate electrode plate, the feed cable, and the current collecting plate are buried on the ground by the insulating layer. When the vehicle does not pass through, the current does not flow to the exposed portion, so that the safety of the pedestrian and other vehicles is secured.

In this case, by embedding the length of the gate electrode plate and the current collecting plate shorter than the length of the vehicle portion, even if a current flows in the passage of the vehicle, the gate electrode plate and the current collector plate, The safety of a pedestrian or other vehicle can be secured.

Further, since the gate power supply unit and the current collecting unit are attached to the bottom surface of the vehicle for power supply and power supply to the buried gate electrode plate and the current collecting plate, it is possible to stably collect electricity according to the operation of the vehicle unit through a relatively simple structure Do.

Particularly, since the gate electrode plate and the current collecting plate extend in parallel with each other along the traveling direction of the vehicle portion, stable current collection can be performed irrespective of changes in the running direction of the vehicle portion or the lane.

Particularly, by applying a switching element which is electrically connected only when a gate voltage is provided, power can be supplied stably when the vehicle is passed, and also, when the vehicle does not pass, Can be improved.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the present invention as defined by the following claims. It can be understood that it is possible.

INDUSTRIAL APPLICABILITY The electric power supply system for an electric vehicle according to the present invention has industrial applicability that can be used as a power supply system of an urban railway vehicle or an electric vehicle such as various types of trams.

10: Power supply system for electric vehicles
20: ground 30: insulating layer
100: vehicle section 101: bottom surface
110: gate power supply unit 120:
200: gate electrode plate 300: collector plate
400: switching element 421: gate connection
422: gate metal layer 423: emitter connection
424: Emitter 425: Collector connection
426: collector 427: gate insulating layer

Claims (9)

A gate electrode plate buried in the ground and exposed to the outside, the gate electrode being supplied with gate power;
A feed cable embedded in the ground and supplying a high voltage power;
A current collecting board buried in the ground and providing current to one surface exposed to the outside;
A switching device electrically driven according to a gate power source supplied from the gate electrode plate to provide a high voltage power provided from the power supply cable to the current collecting plate;
A gate power supply part attached to a bottom surface of the vehicle part to supply the gate power to the gate electrode plate; And
And a current collecting part attached to a bottom surface of the vehicle part, for collecting electric power required to drive the vehicle part in contact with the current collecting plate,
The switching device includes:
Wherein the power supply is electrically short-circuited when the gate power is supplied from the vehicle unit to provide the high-voltage power to the current collector, and when the supply of the gate power is interrupted, the high- And the electric power supply system for an electric vehicle. delete The method according to claim 1,
Wherein the gate electrode plate, the feed cable, and the current collecting plate are insulated from each other by an insulating layer buried in a lower portion of the ground. The method according to claim 1,
Wherein the gate electrode plate and the current collector plate extend parallel to each other along a traveling direction of the vehicle. 5. The method of claim 4,
Wherein a plurality of the gate electrode plates and the current collecting plates are spaced apart from each other along the traveling direction of the vehicle portion,
And the length of one of the gate electrode plate and the current collecting plate is shorter than the length of the vehicle portion. 6. The method of claim 5,
Wherein the switching device is installed such that one switching element is connected to the one gate electrode plate and the one current collecting plate. delete 2. The switching device according to claim 1,
A gate metal layer electrically connected to the gate electrode plate;
An emitter electrically connected to the feed cable;
A collector electrically connected to the current collecting plate;
First and second semiconductor layers formed between the emitter and the collector; And
And a gate insulating layer formed between the gate metal layer and the first semiconductor layer. The method according to claim 1,
Wherein the gate electrode plate and the current collector plate are made of a metal material.

Images