JP2003087902A - Inductive feeding device and truck mounting the same thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inductive feeding device that decreases energy loss by the presence of a gap of an open-loop shape of a receiving core and a truck on which this device is mounted. SOLUTION: Unlike a conventional inductive feeding device, this device is provided with a primary conducting path through which current including an AC constituent flows, a permeable long fixed core provided along the primary conducting path, a permeable receiving core that constitutes a part of the open-loop that surrounds the circumference of the primary conducting path, and a pickup coil wound on the receiving core. Air gap is provided between a pair of the open ends of the receiving core and the side surface of the fixed core.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric type power feeding device used for a truck or the like traveling on a track and a truck equipped with the same. Particularly, the present invention relates to a power supply device characterized by a combined structure of a primary conductive path and a power receiving core, and a trolley equipped with the power supply device.

[0002]

2. Description of the Related Art A technique for supplying power to a truck traveling on a track is
This is an essential technology for systems such as automated guided vehicles and overhead traveling vehicles. Normally, a pantograph type power supply device is used to supply power to the carriage. The pantograph power feeding device is a system in which a pantograph is brought into contact with an overhead conducting wire connected to a power source to receive power. In this pantograph-type power supply device, the pantograph comes off from the overhead conducting wire, and the contact brush of the pantograph is worn, so that regular maintenance and replacement are required. In addition, when considering use in a clean room, the structure must be such that there is no dust due to wear. On the other hand, an inductive power feeding device that receives power in a contactless manner using an electromagnetic induction technique is desired to be put into practical use as a method for solving the above problems.

A conventional dielectric power feeding device will be described with reference to the drawings. FIG. 4 is a structural diagram of a conventional inductive power supply device and a trolley equipped with the same. The conventional inductive power supply device 50 includes a power source 51, a primary conductive path 52, a power receiving core 54, a pickup coil 55, and a primary conductive path support member 56. Power 5
Reference numeral 1 is a source of electric energy for supplying electric power required for the truck 40. The primary conducting path 52 is a conductor cable connected to the power source. A current containing an AC component flows through the primary conductive path 52. The power receiving core 54 is a magnetically permeable structure forming a part of an open loop surrounding the primary conductive path 52. The power receiving core is supported by the carriage 41. The pickup coil 55 uses the electromagnetic induction to receive the power receiving core 5
The electric current induced in the magnetic flux flowing through the coil 4 is taken out, and is wound around the power receiving core 54. Pickup coil 5
The electric wire from 5 is connected to the load 42 on the carriage 41. The primary conductive path support member 56 supports the primary conductive path 52, and is an insulating material having one end supported by the carriage and the other end supporting the primary conductive path. The primary conductive path support member is supported on the side surface of the track 60.

Next, the operation of the conventional dielectric power supply device 50 will be described. The power supply 51 causes a current containing an AC component to flow in the primary conductive path 52. A magnetic field is generated by the current flowing through the primary conductive path 52, and a magnetic flux flows through the power receiving core 54. Power receiving core 54
The magnetic flux flowing through induces a current in the pickup coil 55. The electric current flowing through the pickup coil 55 is the carriage 41.
It is supplied to the upper load 42. Primary conductive path support member 56
Are supported on the track 60 side and support the primary conductive path 52.
When the dolly 41 moves along the track 60, the power receiving core 54
Moves along the trajectory 60. Since the open loop open portion of the power receiving core 54 moves with the primary conductive path supporting member 56 interposed therebetween, the power receiving core 54 does not collide with the primary conductive path supporting member 56 that supports the primary conductive path 52.

[0005]

In the case of the trolley using the above-mentioned dielectric type power feeding device, the width of the open portion of the open loop shape of the power receiving core is prevented so that the power receiving core does not collide with the primary conductive path supporting member. (Hereinafter, referred to as a gap) must be equal to or larger than the width of the primary conductive path supporting member. When the open loop-shaped gap of the power receiving core becomes wider, the magnetic resistance of the magnetic flux flowing through the power receiving core increases. Further, since the self-inductance is inversely proportional to the magnetic resistance, the self-inductance of the primary conductive path becomes small, and the exciting current of the power receiving core having the open loop shape becomes larger than the exciting current of the power receiving core having the closed loop shape. Further, when the gap of the open loop is widened, the leakage magnetic flux is increased and the eddy current loss in the open portion is increased. Further, the leakage reactance also becomes large, which causes a voltage drop. Therefore, there is a problem in that the loss due to the open loop shape gap of the power receiving core cannot be made smaller than it is.

The present invention has been devised in view of the above-mentioned problems, and replaces the conventional dielectric type power feeding device with a small energy loss due to the presence of the open loop-shaped gap of the power receiving core, and energy conversion. An attempt is made to provide a highly efficient dielectric power feeding device and a trolley equipped with the same.

[0007]

In order to achieve the above-mentioned object, a dielectric power supply device according to the present invention is provided with a primary conductive path through which a current containing an alternating current component flows, and a magnetic permeability provided along the primary conductive path. A long fixed core, a magnetically permeable power receiving core forming a part of an open loop surrounding the primary conductive path, and a pickup coil wound around the power receiving core. An air gap was provided between the end and the side surface of the fixed core.

With the above-described structure of the present invention, a current containing an AC component flows in the primary conductive path, a long magnetically permeable fixed core is provided along the primary conductive path, and the magnetically permeable power receiving core is provided in the primary conductive path. A part of an open loop that surrounds the periphery of the path is formed, the pickup coil is wound around the power receiving core, and since there is an air gap between the pair of open ends of the power receiving core and the side surface of the fixed core, The magnetic field is induced by the current, and the magnetic flux flows in the open loop surrounding the primary conductive path, which is composed of the direction intersecting the axis of the fixed core and the power receiving core, and the current is induced in the pickup coil. The conversion efficiency is good.

Further, the dielectric power supply device according to the present invention is
A primary conductive path support member supported by the fixed core and supporting the primary conductive path is provided. According to the configuration of the present invention, the primary conductive path support member is supported by the fixed core,
Since the primary conductive path is supported, the primary conductive path support structure does not interfere with the power receiving core.

Further, the dielectric power supply device according to the present invention is
The power receiving core has a C-shaped open loop shape, and the side surface of the fixed core is sandwiched between the C-shaped open portions. According to the configuration of the present invention, the power receiving core has a C-shaped open loop shape, and the side surface of the fixed core is sandwiched between the C-shaped open portions, so that the loop formed by the power receiving core and the fixed core becomes circular,
Energy loss of magnetic flux can be reduced.

In order to achieve the above object, a trolley equipped with an inductive power feeder according to the present invention is provided along a primary conductive path on which a current containing an AC component flows and the primary conductive path. And a magnetically permeable long fixed core, a magnetically permeable power receiving core forming a part of an open loop surrounding the primary conductive path, and a pickup coil wound around the power receiving core. A pair of open ends and an air gap between the side surface of the fixed core, a dielectric power supply device, a fixed core support member that is supported on the side of the track and supports the fixed core, and on the side of the carriage. A power receiving core supporting member that is supported and supports the power receiving core.

With the above-described structure of the present invention, a current containing an AC component flows in the primary conductive path, a long magnetically permeable fixed core is provided along the primary conductive path, and a magnetically permeable power receiving core is provided in the primary conductive path. The pickup coil is wound around the power receiving core and constitutes an open loop surrounding the path, and has an air gap between a pair of open ends of the power receiving core and a side surface of the fixed core. The member is supported on the track side to support the fixed core, and the power receiving core support member is supported on the dolly side to support the power receiving core, so that the magnetic field is induced by the current and the magnetic flux intersects the axis of the fixed core. It flows in an open loop that surrounds the primary conductive path that is composed of the direction and the power receiving core, and the current is induced in the pickup coil, so the conversion efficiency of the induced current is good and the electric energy of the power supply can be efficiently supplied to the truck.

Further, the truck equipped with the dielectric power feeding device according to the present invention is provided with a primary conductive path supporting member which is supported by a fixed core and supports the primary conductive path. With the above-described configuration of the present invention, since the primary conductive path support member is supported by the fixed core and supports the primary conductive path, there is no risk that the support structure of the primary conductive path interferes with the power receiving core.

Further, in the trolley having the dielectric power feeding device according to the present invention, the power receiving core has a C-shaped open loop shape, and the side surface of the fixed core is sandwiched between the C-shaped open portions. According to the above-described configuration of the present invention, the power receiving core has a C-shaped open loop shape, and the side surface of the fixed core is sandwiched between the C-shaped open portions, so that the loop formed by the power receiving core and the fixed core becomes circular, and the magnetic flux Energy loss can be reduced.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. In each drawing, common portions are denoted by the same reference numerals, and redundant description will be omitted.

The structure of an inductive power feeder according to an embodiment of the present invention and a dolly including the same will be described. FIG. 1 is a front view of the first embodiment of the present invention. FIG. 2 is a front view of the second embodiment of the present invention. FIG. 3 is a plan view of the second embodiment of the present invention.

An inductive power supply device 2 according to an embodiment of the present invention
0 includes a power source 21, a primary conductive path 22, a fixed core 23, a power receiving core 24, a pickup coil 25, and a primary conductive path support member 26. Further, the trolley 10 having the inductive power feeding device has a trolley 11, its inductive power feeding device 20, a fixed core supporting member 27, and a power receiving core supporting member 28. The power supply 21 is a source of electric energy for supplying the electric power required for the load 12 of the carriage 11. The primary conductive path 22 is connected to the power source 2
1 is a cable made of a conductor. The primary conductive path 22 is installed along the track. A current containing an AC component is supplied from the power supply 21 to the primary conductive path 22. The fixed core 23 is a long magnetically permeable member provided along the primary conductive path. Ferrite or the like is used as the magnetically permeable member.

The power receiving core 24 is a magnetically permeable member forming a part of an open loop surrounding the primary conductive path 22. Ferrite or the like is used as the magnetically permeable member.
The power receiving core 24 has a substantially C shape, and has an air gap G formed between a pair of open ends in the opening and side surfaces of the fixed core.
have. The air gap G is preferably as narrow as possible if mechanically allowed. Power receiving core 24
Can move along track 30 with carriage 11. The cross section that intersects with the axis of the fixed core 23 and the power receiving core 24 form a loop that surrounds the periphery of the primary conductive path. The pickup coil 25 is wound around the power receiving core 24, and a current that is induced by the magnetic flux flowing through the power receiving core 24 flows. Two conductors are drawn from the pickup coil 25 and supply electricity to the load 12 (for example, a motor or a control device) of the truck 11. The primary conductive path support member 26 is a member that is supported by the fixed core and supports the primary conductive path. The primary conductive path support member 26 is preferably made of an insulating material.
The fixed core support member 27 is supported on the track 30 side and supports the fixed core 23. The power receiving core support member 28 is supported on the dolly 11 side and supports the power receiving core 24.

FIG. 1 shows a configuration for feeding a single-phase power source. It is provided with one primary conductive path through which one-phase current flows, one fixed core, and one or more power receiving cores.
The plurality of power receiving cores are arranged in the axial direction of the primary conductive path.
The number of cores is determined by the load capacity and the capacity of each power receiving core. 2 and 3 show a configuration for supplying power to a three-phase power source. It is provided with three primary conductive paths through which three-phase currents flow, three fixed cores, and three or three or more power receiving cores. The plurality of power receiving cores are arranged in the axial direction of the primary conductive path.

The operation of the inductive power feeding device will be described by taking the single-phase inductive power feeding device of FIG. 1 as an example. The power supply 21 causes a current containing an AC component to flow in the primary conductive path 22. Primary conductive path 22
A magnetic field is generated by the current flowing through the magnetic field, and a magnetic flux flows through the power receiving core 24. The magnetic flux flowing through the power receiving core 24 is the fixed core 23.
Flows across the axis and returns to the power receiving core 24. At that time, air is present in the air gap G between the pair of open ends of the power receiving core 24 and the side surface of the fixed core 23. The magnetic flux flowing through the power receiving core 24 induces a current in the pickup coil 25. The current flowing through the pickup coil 25 is supplied to the load 12 on the truck 11. Fixed core support member 2
7 is supported on the track 30 side to support the fixed core 23.
The primary conductive path support member 26 is supported by the fixed core 23 and supports the primary conductive path 22. When the carriage 11 moves along the track 30, the power receiving core 24 moves along the track 30. Since the open loop open part of the power receiving core 24 moves with the fixed core 23 interposed therebetween, the power receiving core 24 does not collide with the primary conductive path support member 26 and the primary conductive path 22 fixed to the track 30 side.

By using the dielectric power feeder of the above-described embodiment and the carriage equipped with the dielectric power feeder, the magnetic field is induced by the current flowing through the primary dielectric path, and the magnetic flux forms a loop composed of the power receiving core and the fixed core. Flow, current is induced by the magnetic flux,
The load on the trolley is driven by the current flowing in the pickup coil, so that a non-contact power supply device can be realized.
The loop surrounding the primary dielectric path is composed of a power receiving core and a fixed core, and the induced magnetic flux removes the magnetic resistance except for the air gap between the pair of open ends of the power receiving core and the side surface of the fixed core. Since it flows in a magnetically permeable material such as ferrite having a small value, it is possible to realize an inductive power supply device with less loss. Further, since the fixed core can be supported from the track side through the fixed core support member and the primary conductive path can be supported through the fixed core support member, mechanical interference between the power receiving core and the support structure of the primary conductive path can be avoided. You can

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the gist of the invention. Although the C-shaped power receiving core has been described as an example, the present invention is not limited to this and may be, for example, a U-shape or an E-shape. Although the trolley | bogie shown in the figure demonstrated the trolley | bogie which runs on a floor as an example, it is not restricted to this, For example, an overhead traveling trolley | bogie or a monorail may be sufficient.

[0023]

As described above, the dielectric power feeding device of the present invention has the following effects due to its configuration. The magnetic field is induced by the current, and the magnetic flux flows in the open loop that surrounds the primary conductive path composed of the direction intersecting the axis of the fixed core and the power receiving core, and the current is induced in the pickup coil. The conversion efficiency of is good. Further, since the primary conductive path supporting member made of an insulating material is supported by the fixed core and supports the primary conductive path, there is no fear that the primary conductive path supporting structure interferes with the power receiving core. Further, since the power receiving core has a C-shaped open loop shape, and the side surface of the fixed core is sandwiched between the C-shaped open portions, the loop formed by the power receiving core and the fixed core is circular, and energy loss of magnetic flux is small. it can. Furthermore, the trolley | bogie which mounts the dielectric type electric power feeder of this invention has the following effects by the structure. The magnetic field is induced by the current, and the magnetic flux flows in the open loop surrounding the primary conductive path composed of the direction intersecting the axis of the fixed core and the power receiving core, and the current is induced in the pickup coil. The conversion efficiency is good, and the electric energy of the power supply can be efficiently supplied to the truck. Further, since the primary conductive path support member made of an insulating material is supported by the fixed core and supports the primary conductive path, there is no fear that the support structure of the primary conductive path interferes with the power receiving core. Also,
Since the power receiving core has a C-shaped open loop shape and the side surface of the fixed core is sandwiched between the C-shaped open portions, the loop formed by the power receiving core and the fixed core becomes circular, and energy loss of magnetic flux can be reduced. Therefore, the loss due to the existence of the open loop-shaped gap of the power receiving core can be reduced, and it is possible to provide the dielectric power feeding device having high energy conversion efficiency and the truck equipped with the same.

[0024]

[Brief description of drawings]

FIG. 1 is a front view of a first embodiment of the present invention.

FIG. 2 is a front view of a second embodiment of the present invention.

FIG. 3 is a plan view of a second embodiment of the present invention.

FIG. 4 is a front view of a conventional device.

[Explanation of symbols]

10 Bogie equipped with an inductive power feeder 11 dolly 12 load 20 Inductive power supply 21 power supply 22 Primary conductive path 23 Fixed core 24 Power receiving core 25 pickup coil 26 Primary Conductive Path Support Member 27 Fixed core support member 28 Power receiving core support member 30 orbits 40 dolly 41 dolly 42 load 50 Inductive power supply 51 power supply 52 primary conductive path 54 Power receiving core 55 pickup coil 56 Primary Conductive Path Support Member 60 orbits

Claims (6)

[Claims] 1. A primary conductive path through which a current containing an alternating current component flows, a magnetically permeable long fixed core provided along the primary conductive path, and a part of an open loop surrounding the primary conductive path. And a pickup coil wound around the power receiving core, and having an air gap between the pair of open ends of the power receiving core and the side surface of the fixed core. Characteristic dielectric power feeding device. 2. The dielectric power feeding device according to claim 1, further comprising a primary conductive path supporting member supported by the fixed core and supporting the primary conductive path. 3. The power receiving core has a C-shaped open loop shape, and a side surface of the fixed core is sandwiched between the C-shaped open portions. The inductive power feeder according to. 4. A trolley equipped with an inductive power supply device that travels along a track, comprising: a primary conductive path through which a current containing an AC component flows; and a long magnetically permeable body provided along the primary conductive path. A fixed core, a magnetically permeable power receiving core forming a part of an open loop surrounding the primary conductive path, and a pickup coil wound around the power receiving core, and a pair of open ends of the power receiving core and the A dielectric power feeding device having an air gap between the fixed core and a side surface, a fixed core support member supported on the track side to support the fixed core, and a trolley side supported on the power receiving core. A trolley equipped with an inductive power feeding device, comprising: a power receiving core supporting member. 5. The trolley having the dielectric power feeder according to claim 4, further comprising a primary conductive path supporting member supported by the fixed core and supporting the primary conductive path. 6. The power receiving core has a C-shaped open loop shape, and a side surface of the fixed core is sandwiched between the C-shaped open portions. A trolley equipped with the dielectric power supply device described in.