JP2002165302A - Tracked flatcar system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To overcome the problem of a prior art such that a ferrite sheet made of a high-resistance magnetic material has been hitherto disposed so as to oppose a power-receiving unit in order to prevent the occurrence of an eddy current by interrupting a flux to flow to the side of a structure that holds a feeder, but a flux reduction due to the interruption has caused a decrease of a current generated at a pickup coil and also has resulted in a decrease of supply capability to bring about degradation in efficiency. SOLUTION: A tracked flatcar system is the one that includes a tracked flatcar 13 comprising a power-receiving core 3 having a U-shaped opening and a feeder holder 24 comprising a feeder-holding section that disposes a feeder 5 at a specified position in the U-shaped opening of the core, and feeds power to the tracked flatcar from the feeder via the power-receiving core in a state of noncontacting with the flatcar. Also in the system, a magnetic body 30 is mounted at the neighborhood of the edge of the U-shaped opening of the core of the feeder holder along the direction of the length of the feeder.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contactless power supply system for supplying electric power to a tracked vehicle in a contactless manner.

[0002]

2. Description of the Related Art Conventionally, there has been known a technique in which a transport trolley travels on a track in order to transport an article in a factory or a warehouse. The driving source of these transport vehicles is
There are an internal combustion engine and a motor, but a motor is usually used in a drive source using an internal combustion engine that generates exhaust gas when working in a closed space such as a factory, because the environment deteriorates. There are a battery type and a method of supplying power from electric wires to operate the motor. In the case of the battery type, a charging station is provided because it is necessary to charge the battery every predetermined process (time). Each time you use the power stored in the battery, you need to stop at the charging station and stop there to charge. For this reason, for example, in a transfer system in a factory, the time for the charging is always required, so that the working efficiency is deteriorated.

[0003] Such a problem can be solved by a power supply line system, and there are a contact type and a non-contact type. As a contact type power supply line method, as seen in trains and monorails,
Power is always supplied by contacting the power supply contact with the power supply line.However, in this system, maintenance is indispensable because the contact part wears out, and parts of the contact part are replaced regularly. There is a need to. Further, the contact-type power supply method cannot be used in an explosion-proof area because a spark may be generated at the contact portion. In addition, since metal powder is generated by abrasion of the contact portion, there is a problem that foreign matter such as metal powder cannot be used in a clean room such as a semiconductor manufacturing factory where impurities are mixed.

On the other hand, the non-contact type power supply line system has been used in a clean room because it has no contact portion and does not generate dust and can always supply power. In the structure of this non-contact type power supply system, as shown in FIG. 3, a pair of power supply lines 5.5 are provided via support members 2 along rails serving as tracks. The power supply line 5.5
, A core 3 having a substantially E-shape is provided, the core 3 is fixed to the carrier, and a pickup coil 4 is wound around the core 3 to form a power receiving unit 9. Flows, an electric current is generated in the pickup coil 4 to supply electric power to a motor or the like of the transport vehicle.

[0005]

When this electric power is supplied, an alternating current flows through the power supply lines 5,5.
A magnetic flux is generated around the core and the core 3 as shown by an arrow. If the structure 6 such as a rail supporting the power supply line 5 is made of a conductor such as a metal, the magnetic flux is generated. An eddy current was generated when passing through, causing a loss. In particular, in a ferromagnetic material such as iron, the loss is extremely large, and the power supply characteristics have been significantly reduced.

Conventionally, a high-resistance magnetic material 7 is provided on the surface of the structural member facing the power receiving unit 9 so that the eddy current is not generated, and the eddy current is generated by flowing a current through the power supply lines 5. The magnetic flux flowing through the closed magnetic path formed by the core 3 of the power receiving unit 9 and the high-resistance magnetic material 7, and the magnetic flux generated by the electric current penetrates into the high-resistance magnetic material 7 by the skin effect. I was trying not to.

The high-resistance magnetic material 7 has a large electric resistance, which makes it difficult for current to flow. Even when a change in magnetic flux occurs inside the material, eddy current hardly flows, the loss is reduced, and the high-resistance magnetic material 7 enters the structure 6. Prevent entry of magnetic flux. As a result, the magnetic flux can be shielded, and no eddy current is generated in the structure 6.

However, since the high-resistance magnetic material 7 is attached to the core-side surface of the structure 6, the core 3 and the structure 6
There is a problem that the power supply efficiency is deteriorated. Therefore, the present invention provides a tracked bogie system including a feeder holder having improved feed characteristics.

[0009]

The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described. That is, in claim 1, a tracked truck provided with a power receiving core having an opening concave portion, and a feed line holder having a feed line holding portion for arranging a feed line at a predetermined position of the core concave portion are provided. This is a tracked bogie system configured to non-contactly supply power to a tracked bogie via a power receiving core, and a magnetic body is attached to the feeder line holder near the core opening end along the longitudinal direction of the feeder line.

Further, in the present invention, the power supply line holding portion is located at the back of the concave portion.

According to a third aspect of the present invention, the power receiving core comprises an E-shaped core having two concave portions, and the power supply line holder includes a pair of parallel power supply lines for disposing a power supply line holding portion in the two concave portions. Including a leg, the magnetic body is mounted so as to lie between the leg.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A non-contact power supply system according to one embodiment of the present invention will be described below with reference to the drawings. A non-contact power supply method using a power supply line will be described with reference to FIGS.

FIG. 1 is a diagram schematically showing a tracked bogie system of a system for supplying electric power from a power supply line in a non-contact manner.
In FIG. 1, a track 12 is laid on a moving path of a transport trolley 13, and a feeder line 5 in which a conductive wire such as a copper wire is covered with an insulating material is arranged along the track 12.
A plurality of stations 10 are arranged on the side, and a transport trolley 13 moves between the stations 10 so that articles can be transported from one station 10 to the other station 10.

An AC power supply 11 is connected to one end of the power supply lines 5.
Is provided so that power can be supplied at a predetermined frequency. The carriage 13 is installed so as to reciprocate on the track 12 and to circulate when the track 12 is formed in an annular shape. I am trying to do it. The transport vehicle 13 has a power receiving unit 9 for obtaining power from the power supply line 5, and moves on the track 12 using the power extracted by the power receiving unit 9.

FIG. 2 is a cross-sectional view of the power receiving unit 9 of the tracked bogie system according to the present invention, and explains a power supply method and a configuration of the power receiving unit 9 and the power supply line 5. A rail 20 constituting the track 12 is fixed on a floor 21, and wheels 23 of the transport vehicle 13 run on the rail 20 by driving a motor.

A feed line holder 24 having a substantially U-shape in cross section is fixed on the rail 20 in the longitudinal direction along the rail 20, and a C-shaped feed line holding upper end is opened at the upper end of the feed line holder 24. Parts 24a are formed in the feeder line holding parts 24a and 24a.
5 are installed.

The power receiving unit 9 surrounds the power supply line 5.
The power receiving unit 9 is provided with a bracket 26.
Is fixed to the transport carriage 13, and a guide roller (not shown) is attached to the bracket 26, and the guide roller is disposed so as to abut on the rail 20 or the feeder holder 24, and the rails 20 are positioned by positioning them. When running along the road, the vehicle can run while maintaining a predetermined interval without interfering with each other. A ferrite core 3 having a substantially E-shaped cross section is fixed in a bracket 26 of the power receiving unit 9, and a pickup coil 4 is wound around a protruding portion 3 a at the center of the core 3.

The core 3 has two spaces (concave portions) formed between the projecting portions 3b on both sides and the central projecting portion 3a between the projecting portions 3b, 3b. The feeder line holding unit 2 is located substantially in the center on the left and right in the space diagram.
The feeders 4a and 24a are positioned so that the feeder lines 5.5 are accommodated one by one. The pick-up coil 4 receives an alternating magnetic field generated by flowing a high-frequency current through the power supply lines 5. Then, using the electromagnetic induction phenomenon, the power receiving unit 9 extracts power from the voltage generated in the pickup coil 4 due to the change in the magnetic flux. In this way, electric power is supplied from the power supply line 5 to the power receiving unit 9 in a non-contact manner, to drive a driving motor or supply electric power to a control device.

In the present invention, the feed line holder 2
The shelf 24 substantially horizontally opposes the upper and lower halfway portions inside the shelf 4.
b.24b are formed. However, the shelf 24b may be a single plate connecting both sides, but it is preferable to separate the shelf 24b in order to enhance the cooling effect described later. A mark is provided on the upper surface of the shelf 24 so that the carrier 3 can be stopped at a predetermined position.

A magnetic body 30 is fixed on the shelves 24b. However, it is also possible to adopt a configuration in which the magnetic body 30 is directly laid horizontally inside the power supply line holder 24. The magnetic body 30 extends in the longitudinal direction together with the feeder holder, and is arranged so that the magnetic body 30 is located near the lower end of the core 3. In other words, the upper surface of the magnetic body 30 is arranged so as to be as close to the lower part of the open end of the core 3 as possible. The magnetic body 30 is provided in accordance with the direction and shape of a structural body such as the rail 20.
It is important to arrange the core gap between the members 3b so as to make the core gap as narrow as possible, while providing the core gap so as not to hinder the movement of the core 3 accompanying the traveling of the transport vehicle 13. In particular, the protrusions 3a and 3b of the core 3 of the feeder line holder 24 and the rail 20
It is preferable that the protrusions 3a and 3b are provided at positions close to the structures 3a and 3b as long as the movement of the core 3 is not hindered.

The magnetic body 30 is preferably made of a material having high magnetic permeability, preferably ferrite, but may be a low carbon steel sheet or a silicon steel sheet. Further, it is also possible to configure only the vicinity of the stop position of the transport vehicle 13 where there is a risk of heat generation from ferrite.

A foot (leg) is provided on the lower surface of the magnetic body 30.
30a are provided. The foot 30a
Is the magnetic material 3 between the top of the shelf 24b and the lower end of the core 3.
0 is adjusted to a predetermined height and lifted, and a space is formed between the back side of the magnetic body 30 and a structure such as the rail 20. The reason why the foot portion 30a is formed in a fin shape is to reinforce the magnetic material and to suppress heat generation by releasing heat when the bogie is stopped for a long time in the power receiving state.

In such a configuration, if the direction of the high-frequency current flowing through the power supply line 5 (supposed to be the power supply lines 5a and 5b) is in a state shown in FIG. 2 at a certain moment, the high-frequency current is generated by the current. The direction of the magnetic flux is the direction indicated by the arrow. That is, a magnetic flux is formed that circulates around the power supply lines 5a and 5b in opposite directions. At this time, for example, the magnetic flux generated by the feeder line 25a passes through the inside of the core 3, exits from the tip of the central projection 3a, and reaches the tip of the projection 3b at the end to make one round. I do.

A part of the magnetic flux emitted from the tip of the projection 3a passes through the magnetic body 30. That is, since the magnetic body 30 is made of a material having a high magnetic permeability, the magnetic flux easily passes therethrough, and the protrusion 3
Since the gap between the tip end of a and the tip of a is small, more magnetic flux tends to pass through the magnetic body 30. For this reason, even if there is a structural member such as a rail 20 made of metal or the like opposed to the core 3, the magnetic flux does not reach the rail 20 or the like, whereby eddy current loss can be reduced, and heat generation of the rail 20 or the like is suppressed. You can do it. In particular, in this embodiment, since a space is formed between the magnetic body 30 and the rail 20, it is possible to more reliably prevent the rail 20 from generating heat.

In addition, an increase in the magnetic flux causes a current proportional to the magnetic flux to flow through the pickup coil 4, so that the power that can be supplied to the carrier 13 can be increased. In particular, when the magnetic body 30 is made of ferrite, the loss is reduced, the current hardly flows, the generation of the eddy current is more reliably suppressed, the power supply characteristics can be further improved, and the heat generation of the rail 20 and the like can be reduced. More can be suppressed.

[0026]

As described above, the present invention has the following advantages. That is, as set forth in claim 1, a track carrier provided with a power receiving core having an opening concave portion, and a feed line holder having a feed line holding portion for arranging a feed line at a predetermined position of the core concave portion are provided. A tracked bogie system in which power is supplied to a tracked bogie in a non-contact manner through a power receiving core, since a magnetic body is attached along a longitudinal direction of the feeder at a position near the core opening end of the feeder holder. As a result, the core gap becomes smaller and the power that can be picked up increases. For this reason, the power supply efficiency could be improved.

Further, since the power supply line holding portion is located at the back side of the concave portion, the power supply efficiency is higher than at the center of the concave portion.

In addition, since the magnetic body is attached to the leg of the feeder holder so as to lie horizontally, the distance between the core and the magnetic body can be further reduced. Further, as a result, a space is formed on the back surface of the magnetic body, so that an effect of cooling heat generated when the bogie is stopped for a long time in the power receiving state can be expected.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a tracked bogie system of a system for supplying electric power from a power supply line in a non-contact manner.

FIG. 2 shows a power receiving unit 9 of the tracked bogie system according to the present invention.
FIG.

FIG. 3 is a sectional view of a power receiving unit 9 of the conventional tracked truck system.

[Explanation of symbols]

 Reference Signs List 3 core 5 power supply line 13 carriage 24 power supply line holder 24a power supply line holding unit 30 magnetic material

Claims (3)

[Claims] 1. A tracked truck having a power receiving core having an opening recessed portion, and a power feeding line holder having a power feeding line holding portion for arranging a power feeding line at a predetermined position of the core recessed portion. A tracked bogie system adapted to supply power to a tracked bogie in a non-contact manner through a core material at a position near the core opening end of the feeder line holder along a longitudinal direction of the feeder line. Tracked truck system. 2. The tracked bogie system according to claim 1, wherein the feeder line holding portion is located on the inner side of the concave portion. 3. The power receiving core comprises an E-shaped core having two concave portions, the power line holder includes a pair of parallel legs for disposing a power line holding portion in the two concave portions, 3. The tracked bogie system according to claim 1, wherein the magnetic body is mounted so as to lie between the legs.