KR101222008B1 - Lifting device of pick-up panel and apparatus for adjusting distance of contactless power pick-up, and method for therefor - Google Patents

Lifting device of pick-up panel and apparatus for adjusting distance of contactless power pick-up, and method for therefor Download PDF

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Publication number
KR101222008B1
KR101222008B1 KR20100137738A KR20100137738A KR101222008B1 KR 101222008 B1 KR101222008 B1 KR 101222008B1 KR 20100137738 A KR20100137738 A KR 20100137738A KR 20100137738 A KR20100137738 A KR 20100137738A KR 101222008 B1 KR101222008 B1 KR 101222008B1
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current collector
collector
lifting
power
current
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KR20100137738A
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Korean (ko)
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KR20120075857A (en
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조동호
김진규
서동관
금복희
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한국과학기술원
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Abstract

The present invention relates to a current collector elevating device and a contactless power current collecting distance adjusting device and method, the disclosed contactless power current collecting distance adjusting device is a power supply for detecting a feed position where induced power can be induced in the current collector due to the power supply line A position detection unit, a collision detection unit for detecting an approach of a collider that may collide with the current collector, a current collector driving unit for driving a current collector lifting device for elevating the current collector, a feed position detection unit and a collision detection unit According to the current collector, the current collector distance control unit for controlling the separation distance between the power supply line and the current collector, and driven based on the power supply / current collection infrastructure, such as online electric car, light rail, high-speed electric train, industrial automation equipment When collecting current in various systems or devices with inductive feeding technology that receives electric power and enables charging while driving Has the advantage of being able to reduce the distance between the collector and the power supply line to maximize current collection efficiency, and when it is not in the current collector by increasing the distance of the collector and the feed line to prevent the collision of the collector and obstacles in advance.

Description

Current raising and lowering device and method for contactless electric current collecting distance control device and method {LIFTING DEVICE OF PICK-UP PANEL AND APPARATUS FOR ADJUSTING DISTANCE OF CONTACTLESS POWER PICK-UP, AND METHOD FOR THEREFOR}

The present invention relates to a contactless current collector, and more particularly, a current collector elevating device that can be applied to a system using multiple electric power based on a battery and a power supply / current infrastructure, such as an on-line electric vehicle. A contactless power current collecting distance adjusting device and method.

As is well known, on-line electric vehicles, light rail, high-speed electric trains, industrial automation equipment, etc. have an induction power supply technology that can be charged while driving by receiving driving power based on the power supply / current infrastructure. For example, in the European Union, an induction feeding technology called Electric Vehicle Inductive Automatic Charging (EVIAC) is used in various fields including electric vehicles and lightweight trains.

However, the induction feeding technology according to the prior art has a problem that the current collection efficiency has not reached a satisfactory level yet due to the basic characteristics using the electric field electric power. In particular, in the case of the online electric vehicle having the structure and the principle that the induced power is generated due to the power supply line embedded in the ground and is induced in the current collector installed in the vehicle, and the power is supplied from outside without physical contact, Accordingly, since the current collection efficiency has many changes, a method of improving the current collection efficiency is urgently required.

The present invention has been proposed to solve the problems of the prior art, and provides a current collector lifting apparatus capable of elevating and driving a current collector in which induced power may be induced due to a power supply line.

In addition, the present invention provides a current collector distance adjusting device that can drive the current collector lifting device to adjust the separation distance between the current collector and the power supply line.

In addition, the present invention provides a current collecting distance adjustment method that can control the separation distance between the current collector and the power supply line by driving the current collector lifting device.

As a first aspect of the present invention, a current collector elevating device includes a current collector structure in which a current collector capable of inducing induced electric power is installed, a current collector supplied with electric power through the current collector, and the current collector structure. An elevating structure for raising or lowering a current collector structure and an elevating driver for providing an elevating driving force to the elevating structure.

As a second aspect of the present invention, a contactless power current collecting distance adjusting device includes a power feeding position detecting unit for detecting a power feeding position at which induced power may be induced in a current collector due to a power feeding line, and a collider that may collide with the current collector. And controlling the current collector driving unit according to a detection value of the collider body for detecting an approach of the vehicle, a current collector driving unit for driving the current collector lifting device for elevating the current collector, and a power supply position sensing unit and the sensed value of the collider detection unit. It may include a current collecting distance adjusting unit for adjusting the separation distance between the power supply line and the current collector.

In a third aspect of the present invention, there is provided a method for adjusting a contactless power current collecting distance, the method comprising: detecting a power feeding position at which induced power may be induced in a current collector due to a power feeding line; And driving a current collector elevating device to elevate the distance between the power supply line and the current collector.

According to an embodiment of the present invention, a variety of systems having induction power supply technology that enables charging even while driving by receiving driving power based on a power supply / current infrastructure such as an online electric vehicle, a light rail, a high-speed electric train, industrial automation equipment, or In the case of current collector, the distance between the current collector and the power supply line is reduced to maximize the current collection efficiency, and when the current collector is not collected, the distance between the current collector and the power supply line can be increased to prevent the collision between the current collector and the obstacle in advance. It works.

1 is a block diagram of a contactless power current collecting distance adjusting device and a current collector lifting device according to an embodiment of the present invention.
2 is a configuration of the current collector lifting apparatus according to an embodiment of the present invention.
3 is a block diagram of a current collector lifting apparatus according to another embodiment of the present invention.
4 is a configuration diagram of a current collector structure according to an embodiment of the present invention.
5 is a flowchart illustrating a method of adjusting a contactless power collecting distance according to an embodiment of the present invention.
6 is a state diagram illustrating a process of driving the current collector lifting device by the contactless power current collecting distance adjusting device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the invention to those skilled in the art. Is provided to fully convey the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

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. The following terms are defined in consideration of the functions in the embodiments of the present invention, which may vary depending on the intention of the user, the intention or the custom of the operator. Therefore, the definition should be based on the contents throughout this specification.

Each block of the accompanying block diagrams and combinations of steps of the flowchart may be performed by computer program instructions. These computer program instructions may be loaded into a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus so that the instructions, which may be executed by a processor of a computer or other programmable data processing apparatus, And means for performing the functions described in each step are created. These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in each block or flowchart of each step of the block diagram. Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps may be performed on the computer or other programmable data processing equipment to create a computer-implemented process to create a computer or other programmable data. Instructions that perform processing equipment may also provide steps for performing the functions described in each block of the block diagram and in each step of the flowchart.

In addition, each block or step may represent a portion of a module, segment or code that includes one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative embodiments, the functions mentioned in the blocks or steps may occur out of order. For example, the two blocks or steps shown in succession may in fact be executed substantially concurrently or the blocks or steps may sometimes be performed in the reverse order, depending on the functionality involved.

The current collector lifting apparatus and the contactless electric current collecting distance adjusting device according to the embodiment of the present invention are charged while driving while being supplied with driving power based on a feeding / current collecting infrastructure such as an online electric vehicle, a light rail, a high-speed electric train, and an industrial automation equipment. It can be applied to various systems or apparatuses to which the induction feeding technology which enables this, and in the following description, induced power is generated due to the power supply line embedded in the ground and induced in the current collector installed in the vehicle for physical contact. An example of an online electric vehicle having a structure and a principle of receiving power from outside will be described as an example.

1 is a block diagram of a contactless power current collecting distance adjusting device and a current collector lifting device according to an embodiment of the present invention.

As shown therein, the contactless power current collecting distance adjusting device 100 includes a power feeding position detecting unit 110, a collider body detecting unit 120, a collecting distance adjusting unit 130, and a current collecting driving unit 140.

The feed position detecting unit 110 detects a feed position at which induced power may be induced in the current collector due to the feed line embedded in the ground. For example, the feed position detecting unit 110 may be implemented as a Gaussian sensor or a magnetic field sensor.

The collider detection unit 120 detects an approach of a collider that may collide with the current collector. For example, such a collision detector 120 may be implemented as a proximity sensor.

The current collector driver 140 drives the current collector elevating device 200 for elevating the current collector.

The current collecting distance adjusting unit 130 controls the current collector driving unit 140 according to the sensing values of the power feeding position detecting unit 110 and the collider detecting unit 120 to adjust the separation distance between the power feeding line and the current collecting unit.

The current collector elevating apparatus 200 according to an embodiment of the present invention is coupled to the current collector structure and the current collector structure that is supplied with power through the current collector is installed, the current collector structure can be induced induced power is driven At least one of the elevating structure for raising or lowering the current collecting structure, the elevating driver for providing elevating driving force to the elevating structure, and the elevating structure or the elevating driver for determining the elevating position of the elevating structure. It may include a state detector for detecting a driving state.

2 is a configuration of the current collector lifting apparatus according to an embodiment of the present invention.

As shown in the drawing, the current collector elevating device 200 includes a current collector structure 210 in which a current collector 211 in which induced power is induced, and a lower frame of the current collector supplied power through the current collector 211. A lift structure 220 coupled to the current collector structure 210 and the current collector structure 210 to raise or lower the current collector structure 210, and a lift driver 230 to provide a lift driving force to the lift structure 220. In order to determine the lifted position of the lift structure 220, a state detector 240 may detect a driving state of the lift structure 220.

The elevating structure 220 is hinged so that the plurality of strut bars 221 and 222 cross each other in an X shape, and both ends of the strut bars 221 and 223 are connected to the lower frame 10 and the current collecting structure 210 of the current collector. Is hinged, at least any one of the hinge coupling point of the lower frame 10 and the strut bar (221, 223) of the current collector and at least any of the hinge coupling point of the current collector structure 210 and strut bar (221, 223) Sliding bases 225 and 227 in which the strut bars 221 and 223 are slidably moved are installed at one point.

For example, the elevating driver 230 may be implemented as a linear cylinder hinged to any one of the plurality of strut bars 221 and 223 and the current collector structure 210, the state detector 240 is a plurality of strut bar 221, 223 may be implemented with a rotation potentiometer installed on the axis of the intersecting hinge coupling. Alternatively, the state detector 240 may be replaced with a state detector 240 'implemented with a linear potentiometer connected to both ends of the lower frame 10 of the current collector and the current collector structure 210.

3 is a block diagram of a current collector lifting apparatus according to another embodiment of the present invention.

As shown in the drawing, the current collector elevating device 200 ′ includes a current collector structure 210 provided with a current collector 211 capable of inducing induced power, and a lower portion of the current collector supplied power through the current collector 211. A lift structure 250 coupled to the frame 10 and the current collector structure 210 to raise or lower the current collector structure 210 when driven, and a lift driver 260 to provide a lift driving force to the lift structure 250. And a state detector 270 that detects a driving state of the lifting driver 260 to determine a lifting position of the lifting structure 250.

The lifting structure 250 is engaged with the rack bars 251 and 253 and the rack bars 251 and 253, one side of which is coupled to the current collector structure 210 and passes through a through hole provided in the lower frame 10 of the current collector. It may include a pinion gear 255 to rotate in the state to provide the lifting force of the rack bars (251, 253). Although not shown in FIG. 3, a separate pinion gear may be engaged to rotate in the rack bar 253, or the gear surface of the rack bar 253 may be removed. Alternatively, the rack bar 253 may be removed to guide the lifting of the current collector structure 210.

For example, linear bearings 11 and 13 capable of elevating the rack bars 251 and 253 may be installed in the through holes provided in the lower frame 10 of the current collector, and the elevating driver 260 rotates the pinion gear 255. It may be implemented as a driving motor, the state detector 270 may be implemented as an encoder for counting the number of revolutions of the motor.

4 is a configuration diagram of a current collector structure according to an embodiment of the present invention.

As shown therein, the current collector structure 210 may include a current collector 211 in which induced power is induced by a feed line embedded in the ground, and a feed position where induced power may be induced in the current collector 211 by a feed line. It may include a feed position sensor 213 for detecting the collision object sensor 215 for detecting the approach of the collider that may collide with the current collector 211. Here, the feeding position sensor 213 may be an embodiment of the feeding position detecting unit 110 shown in FIG. 1, and the colliding body detecting sensor 215 may be an embodiment of the colliding body detecting unit 120 shown in FIG. 1. have.

5 is a flowchart illustrating a method of adjusting a contactless power collecting distance according to an embodiment of the present invention.

As shown in the drawing, the contactless power collecting distance adjusting method includes detecting a feeding position at which induced power may be induced in a current collector due to a feeding line embedded in the ground (S301 and S303), and detecting a feeding position. Accordingly, driving the current collector lifting device for elevating the current collector may include adjusting the separation distance between the power supply line and the current collector (S305 to S319).

Adjusting the separation distance between the power supply line and the current collector (S305 to S319), if the feeding position is not detected by driving the current collector lifting device to increase the separation distance between the power supply line and the current collector ends the rise of the current collector Driving the current collector up until it reaches (S305, S307), and if the feed position is detected, the current position of the current collector is checked, and then driving the current collector lifting device to reduce the separation distance between the power supply line and the current collector. Steps (S311 to S313) of driving the current collector down until the whole descending is completed; detecting approaching of a collider that may collide with the current collector while driving the current collector down (S317 and S319); When the colliding body is detected, the method may include stopping the driving of the current collector lifting device (S309).

6 is a state diagram illustrating a process of driving the current collector lifting device by the contactless power current collecting distance adjusting device according to an embodiment of the present invention. In FIG. 6, the feed position sensor 213 is implemented as a Gaussian sensor, the collision sensor 215 is implemented as a proximity sensor, and a rotation potentiometer, a linear potentiometer, and an encoder, which are examples of the state detectors 240, 240 ′, and 270. Is referred to as the displacement sensor. Contactless Power System (CPS) is installed in the current collector powered by the current collector and provides the received power as the driving power of the online electric vehicle, and is based on the on state or the off state of the CPS. This indicates that the power feeding position can be detected or determined. That is, the electric field detection value of the Gaussian sensor and the state value of the CPS can be used to detect or determine the power feeding position.

On-line electric vehicles have a lot of changes in current collection efficiency depending on the driving environment. That is, due to variables such as driving speed, road surface shape, obstacles (stone, sand, speed bumps, etc.), it is not always possible to satisfy the idealized current collection efficiency planned at the time of design. It can have negative consequences in terms of destination arrival time and energy use efficiency. Therefore, it is necessary to find a way to maximize the current collecting efficiency of online electric vehicles.

The current collecting efficiency of an online electric vehicle is inversely proportional to the size of the separation distance between the current collector and the power supply line. Therefore, the current collection efficiency may be improved by reducing the separation distance between the current collector and the power supply line. However, if the current collector is installed to maintain the state close to the ground, the current collector may collide with an obstacle that may exist on the ground and the current collector may be damaged.

Online electric vehicle according to an embodiment of the present invention to maximize the current collector efficiency by reducing the separation distance between the current collector and the power supply line during the current collector, and increase the separation distance between the current collector and the power supply line when the current collector is not collected To prevent conflicts in advance.

Referring to FIG. 6, when the CPS is turned off or the electric field is not detected by the Gaussian sensor while stopping or driving the online electric vehicle, it is determined that the online electric vehicle is not located in the power supply line. The position is determined, and the current collector is driven to move the current collector to the highest position. As a result, it is possible to minimize air resistance due to the current collector while driving, to secure stable cornering of the online electric vehicle, and to protect the current collector by preventing collision between the current collector and obstacles such as speed bumps.

Next, when the CPS is on or the electric field is detected by the Gaussian sensor while the online electric vehicle is stopped or driving, it is determined that the online electric vehicle is located in the power supply line, and the current position of the current collector is determined by the displacement sensor. The displacement distance for lowering and moving to the lowest position is calculated, and the current collector is driven to lower and move the current collector. At this time, the presence or absence of an obstacle such as a collider is determined based on the detection value of the proximity sensor. When the obstacle is not present, the current collector is moved downward to the lowest position so that the electric field detection value of the Gaussian sensor reaches the maximum value.

In addition, when the CPS is kept on or the electric field is continuously detected by the Gaussian sensor, the high and low state of the current collector is maintained.

In addition, when it is determined that an obstacle is present based on the detection value of the proximity sensor while driving the current collector lifting device to move the current collector downward, the downward driving of the current collector is stopped and the current high and low state is maintained to prevent the obstacle and the house. Prevent the entire collision in advance.

On the other hand, when driving the current collector lifting device to move the current collector up or down, speed / position control, proportional control, integral control, differential control, etc. are applied, and the current collector stops exactly at the commanded lifting position through feedback control. Drive, and control and drive to stabilize and gradually reduce the transient when moving to the commanded lifting position.

The contactless power current collecting distance adjusting method according to the embodiment of the present invention described above may be created by a computer program. Codes and code segments constituting this computer program can be easily inferred by a computer programmer in the art. In addition, the computer program is stored in a computer readable medium, and is read by a computer or a contactless power collecting distance adjusting device (for example, a collecting distance adjusting unit) according to an embodiment of the present invention. In this case, the contactless power collecting distance adjusting method can be implemented. The information storage medium includes a magnetic recording medium, an optical recording medium and a carrier wave medium.

100: contactless power collector distance adjusting device
110: power supply position detection unit 120: collider detection unit
130: current collector distance adjusting unit 140: current collector drive unit
200: current collector lifting device
210: current collector structure 220, 250: lifting structure
230, 260: lift driver 240, 270: status detector

Claims (32)

delete delete delete delete delete delete delete A current collector structure provided with a current collector capable of inducing induced power;
A lift structure coupled to a current collector and a current collector supplied with electric power through the current collector to raise or lower the current collector structure when driven;
A lift driver for providing a lift drive force to the lift structure;
And a state detector for detecting a driving state of the elevating structure to determine the elevating position of the elevating structure,
The lifting structure is hinged to the plurality of strut bar to cross the X-shape, both ends of the strut bar is hinged to the current collector and the current collector structure, at least any one of the hinge coupling point of the current collector and the strut bar A sliding base on which the strut bar is slidably moved is installed at at least one of a point and a hinge coupling point of the current collector structure and the strut bar,
The state detector is a rotation potentiometer installed on the axis of the hinge coupling where the plurality of strut bars are crossed.
Current collector lifting device. The method of claim 8,
The lift driver is a linear cylinder hinged to any one of the plurality of strut bars and the current collector structure.
Current collector lifting device. A current collector structure provided with a current collector capable of inducing induced power;
A lift structure coupled to a current collector and a current collector supplied with electric power through the current collector to raise or lower the current collector structure when driven;
A lift driver for providing a lift drive force to the lift structure,
The elevating structure includes a rack bar having one side coupled to the current collecting structure and passing through a through hole provided in the current collecting device, and a pinion gear that rotates in engagement with the rack bar to provide a lifting force of the rack bar.
Current collector lifting device. 11. The method of claim 10,
The current collector is provided with a linear bearing capable of lifting the rack bar in the through hole.
Current collector lifting device. 11. The method of claim 10,
The lift driver is a motor that rotationally drives the pinion gear.
Current collector lifting device. 13. The method of claim 12,
The current collector lifting device further includes a state detector for detecting a driving state of the lifting structure to determine a lifting position of the lifting structure,
The state detector is an encoder that counts the rotation speed of the motor.
Current collector lifting device. A feeding position detecting unit detecting a feeding position where induced power may be induced in a current collector due to a feeding line;
A collider detecting unit configured to sense an approach of a collider that may collide with the current collector;
A current collector driving unit for driving a current collector lifting device for elevating the current collector;
And a current collecting distance controller configured to control the current collector driving unit according to the sensing values of the power feeding position detector and the collider, and adjust the separation distance between the feed line and the current collector.
Contactless power collector distance adjusting device. 15. The method of claim 14,
The feed position detecting unit is a Gaussian sensor or a magnetic field sensor
Contactless power collector distance adjusting device. 15. The method of claim 14,
The collider body is a proximity sensor
Contactless power collector distance adjusting device. 15. The method of claim 14,
The current collector lifting device includes: a current collector structure provided with a current collector capable of inducing induced power;
A lift structure coupled to a current collector and a current collector supplied with electric power through the current collector to raise or lower the current collector structure when driven;
A lift driver for providing a lift drive force to the lift structure;
Contactless power collector distance adjusting device. The method of claim 17,
The current collector elevating apparatus further includes a state detector for detecting a driving state of at least one of the elevating structure and the elevating driver to determine the elevating position of the elevating structure.
Contactless power collector distance adjusting device. The method of claim 18,
The state detector is a linear potentiometer connected to both ends of the current collector and the current collector structure.
Contactless power collector distance adjusting device. The method of claim 17,
The current collector structure is provided with at least one sensing unit of the power feeding position detecting unit and the colliding body detecting unit.
Contactless power collector distance adjusting device. 21. The method of claim 20,
The feed position detecting unit is a Gaussian sensor or a magnetic field sensor
Contactless power collector distance adjusting device. 21. The method of claim 20,
The collider body is a proximity sensor
Contactless power collector distance adjusting device. The method of claim 17,
The lifting structure is hinged to the plurality of strut bar to cross the X-shape, both ends of the strut bar is hinged to the current collector and the current collector structure, at least any one of the hinge coupling point of the current collector and the strut bar A sliding base on which the strut bar is slidably moved is installed at at least one of a point and a hinge coupling point of the current collector structure and the strut bar.
Contactless power collector distance adjusting device. 24. The method of claim 23,
The current collector lifting apparatus further includes a state detector for detecting a driving state of the lifting structure to determine a lifting position of the lifting structure.
The state detector is a rotation potentiometer installed on the axis of the hinge coupling where the plurality of strut bars are crossed.
Contactless power collector distance adjusting device. 24. The method of claim 23,
The lift driver is a linear cylinder hinged to any one of the plurality of strut bars and the current collector structure.
Contactless power collector distance adjusting device. The method of claim 17,
The elevating structure includes a rack bar having one side coupled to the current collecting structure and passing through a through hole provided in the current collecting device, and a pinion gear that rotates in engagement with the rack bar to provide a lifting force of the rack bar.
Contactless power collector distance adjusting device. The method of claim 26,
The current collector is provided with a linear bearing capable of lifting the rack bar in the through hole.
Contactless power collector distance adjusting device. The method of claim 26,
The lift driver is a motor that drives the pinion gear to rotate.
Contactless power collector distance adjusting device. 29. The method of claim 28,
The current collector lifting apparatus further includes a state detector for detecting a driving state of the lifting driver to determine a lifting position of the lifting structure.
The state detector is an encoder that counts the number of revolutions of the motor.
Contactless power collector distance adjusting device. delete Detecting a feeding position at which induced power may be induced in the current collector due to the feeding line;
And controlling a separation distance between the power supply line and the current collector by driving a current collector elevating device for elevating the current collector according to a sensing result of the power feeding position.
The adjusting may include driving the current collector elevating device to reduce a distance between the feed line and the current collector when the power feeding position is detected;
Detecting an approach of a collider that may collide with the current collector while driving the current collector lifting device,
Stopping driving of the current collector lifting device when the colliding body is detected;
How to adjust the contactless power collection distance. The method of claim 31, wherein
The adjusting may include driving the current collector elevating device to increase a separation distance between the feed line and the current collector if the power feeding position is not detected.
How to adjust the contactless power collection distance.
KR20100137738A 2010-12-29 2010-12-29 Lifting device of pick-up panel and apparatus for adjusting distance of contactless power pick-up, and method for therefor KR101222008B1 (en)

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KR20100137738A KR101222008B1 (en) 2010-12-29 2010-12-29 Lifting device of pick-up panel and apparatus for adjusting distance of contactless power pick-up, and method for therefor

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KR102088039B1 (en) 2017-09-15 2020-03-11 주식회사 아모센스 Electromagnetic inductive power supply apparatus
CN110855025B (en) * 2019-11-20 2021-08-31 厦门大学 Transmitting coil positioning and aligning device for wireless energy transmission

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Publication number Priority date Publication date Assignee Title
JPH066906A (en) * 1992-06-18 1994-01-14 Kawasaki Heavy Ind Ltd Current collector
JPH06105404A (en) * 1991-05-07 1994-04-15 Haruto Okumura Framework structure for pantograph
KR20070076782A (en) * 2006-01-20 2007-07-25 한국철도기술연구원 Non-contact electric power supply system
KR20080014834A (en) * 2005-05-24 2008-02-14 리어덴 엘엘씨 System and method for powering a vehicle using radio frequency generators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06105404A (en) * 1991-05-07 1994-04-15 Haruto Okumura Framework structure for pantograph
JPH066906A (en) * 1992-06-18 1994-01-14 Kawasaki Heavy Ind Ltd Current collector
KR20080014834A (en) * 2005-05-24 2008-02-14 리어덴 엘엘씨 System and method for powering a vehicle using radio frequency generators
KR20070076782A (en) * 2006-01-20 2007-07-25 한국철도기술연구원 Non-contact electric power supply system

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