JP2003163128A - Contactless feeding device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contactless feeding device which is highly efficient and economical by interlocking an additional magnetic material core with a magnetic material core of a movable body and moving it. <P>SOLUTION: The additional magnetic material core is arranged near a primary feeder so as to shut the opening of the magnetic material core. The additional magnetic material core has a dimension smaller than the dimension of the magnetic material core in the primary feeder direction, and is divided into two pieces holding a feeder stay to support the primary feeder. The additional magnetic material core divided into two pieces holds the feeder stay with an insulation support tool, is movably connected along the primary feeder, and can move together with the magnetic material core as the movable body moves. When the movable body is set on a running path, the additional magnetic material core is connected to the insulation support tool by a coupling member provided with the movable body or the magnetic material core of the movable body, and can move together with the magnetic material core as the movable body moves. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a non-contact power feeding device for transmitting electric power to a moving body such as a carrier traveling along a track in a non-contact manner.

[0002]

2. Description of the Related Art Conventionally, unmanned factories have been promoted as part of factory automation.
The goods are transported on the premises by unmanned transport vehicles. This carrier is self-propelled on the track to the place where the material to be transported is placed, stops at a predetermined position, and loads the material according to the command issued from the control unit installed on the ground side. It is designed to be transported to the ground.

As a device for supplying power to this carrier,
There is a so-called non-contact power feeding device that feeds power to the transport vehicle from the ground side without contacting the transport vehicle. This non-contact power supply device is electromagnetically coupled to the ground side primary side circuit for supplying high frequency current to the power supply line laid on the track, the power supply line, and a desired DC voltage via a rectifier, a constant voltage circuit, etc. And a secondary-side circuit on the vehicle side for converting into.

In the case of this non-contact power supply device, unlike a device such as a trolley that mechanically contacts a power supply line with a pantograph or a brush to supply power, power is supplied in a non-contact state, resulting in wear. This eliminates the need for maintenance and inspection work on brushes, and above all, does not generate dust or the like due to contact with brushes while traveling, which is convenient for operation in a clean atmosphere such as a clean room.

FIG. 2 shows a configuration example of a non-contact power feeding device according to a conventional technique. In this figure, a pair of reciprocating power supply lines 1,
The power of 2 is 2 due to the electromagnetic coupling through the magnetic core 11.
It is transmitted to the next winding 12. However, in the non-contact power feeding device according to this method, in the magnetic circuit for transmitting electric power by magnetic coupling with the power feeding lines 1 and 2 of a moving body such as a carrier, a magnetic path formed by a magnetic core 11 close to the power feeding line. Since the opening is large, the excitation loss is large and it is difficult to realize a highly efficient device. Then, Japanese Patent Laid-Open No. 9-9370
As described in No. 4, a method of arranging an additional magnetic core along the power supply line near the power supply line to close the opening was considered.

[0006]

However, the above-mentioned method has a problem in that it is necessary to dispose an additional magnetic core over the entire power supply line, resulting in a huge equipment cost.

The present invention has been made under such a background, and provides a highly efficient and economical non-contact power supply device by moving the additional magnetic core in conjunction with the magnetic core of the moving body. The purpose is to do.

[0008]

According to a first aspect of the present invention, a pair of primary power supply lines arranged along a traveling path of a moving body and a magnetic core provided on the moving body are wound. In a non-contact power feeding device that non-contactly transmits power from the primary power feeding line to the secondary winding by electromagnetic induction with a secondary winding,
There is provided a non-contact power feeding device characterized in that an additional magnetic material core is arranged in the vicinity of the primary power feeding line so as to close the opening of the magnetic material core.

According to a second aspect of the present invention, in the non-contact power feeding device according to the first aspect, the additional magnetic material core has a dimension within the dimension of the magnetic material core in the primary feeding line direction, It is divided into two parts with a power supply line stay supporting the primary power supply line sandwiched therebetween, and the additional magnetic material core divided into two parts sandwiches the power supply line stay by an insulating support, and is connected to the primary power supply line. It is movably connected along the movable body, and is movable together with the magnetic core in accordance with the movement of the movable body.

According to a third aspect of the present invention, in the non-contact power feeding device according to the first or second aspect, the additional magnetic body core is configured to move the moving body when the moving body is set on the traveling path. Alternatively, it is characterized in that it is coupled to the insulating support by a coupling member provided on the magnetic core of the moving body and is movable together with the magnetic core according to the movement of the moving body.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a configuration of a non-contact power feeding device according to an embodiment of the present invention. In this figure, reference numerals 1 and 2 denote a pair of power supply lines, which are attached to the side wall 5 by primary power supply line stays 3 and 4 made of an insulator.

On the side wall of the power supply line 1, additional magnetic material cores 6a and 6b having a thickness in the power supply line direction which is less than the thickness of the magnetic material core 11 to be described later are connected by an insulating support 7. It is arranged so as to be pressed against the next power supply line stay 3 and movable in the power supply line direction. Similarly, on the side wall side of the power supply line 2, additional magnetic material cores 8a and 8b having a thickness in the power supply line direction that is less than the thickness of the magnetic material core 11 in the power supply line direction are connected by the insulating support 9, and the primary power supply line is provided. It is arranged so as to be pressed against the stay 4 and movable in the direction of the power supply line.

On the other hand, a coupling member (not shown) is provided on the moving body of the vehicle or the like, or on the magnetic core 11 on the moving body side, and when the vehicle is set on the running track, the insulating support 7 and 9 and the magnetic core 11 are mechanically coupled, and the magnetic core 11 and the additional magnetic cores 6a, 6b, 8a, and 8b move in conjunction with each other in accordance with the movement of the carrier or the like. .

With the above structure, the magnetic core 11 and the additional magnetic cores 6a, 6b, 8a and 8b are provided.
The magnetic circuit configured by does not have a gap of a long magnetic path, and can be an economical non-contact power feeding device with high transmission efficiency.

The operation of one embodiment of the present invention has been described in detail above with reference to the drawings. However, the present invention is not limited to this embodiment, and design changes and the like within the scope not departing from the gist of the present invention. Even so, it is included in the present invention.

[0016]

As described above, according to the present invention, the additional magnetic core within the size of the secondary magnetic core is moved in conjunction with the movement of the moving body. As a result, the air gap of the magnetic path is reduced, and the effect that the non-contact power feeding device with high excitation efficiency and high transmission efficiency can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a contactless power supply device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a contactless power feeding device according to a conventional technique.

[Explanation of symbols]

1, 2, ... Primary power supply line 3, 4 ... Primary power supply line stay 5 ... Side wall 6a, 6b ... additional magnetic core 7 ... Insulation support 8a, 8b ... Additional magnetic core 9 ... Insulation support 11 ... Magnetic core 12 ... Secondary winding

Claims (3)

[Claims] 1. The electromagnetic induction between a pair of primary power supply lines arranged along a traveling path of a moving body and a secondary winding wound around a magnetic core provided on the moving body, In a contactless power supply device for transmitting power from a primary power supply line to the secondary winding in a contactless manner, an additional magnetic core is arranged near the primary power supply line so as to close the opening of the magnetic core. A non-contact power supply device characterized by the above. 2. The additional magnetic core has a size within the size of the magnetic core in the primary power supply line direction, and is divided into two parts with a power supply line stay supporting the primary power supply line interposed therebetween. The additional magnetic core divided into two is connected by an insulating support so as to sandwich the power supply line stay and movably along the primary power supply line, and the magnetic core is moved according to the movement of the movable body. The contactless power supply device according to claim 1, wherein the contactless power supply device is movable together with the contactless power supply device. 3. The additional magnetic core is coupled to the insulating support by the moving body or a coupling member provided on the magnetic body core of the moving body when the moving body is set on the traveling path. The contactless power supply device according to claim 1 or 2, wherein the contactless power supply device is configured to be movable together with the magnetic core according to the movement of the movable body.