JPH06189403A - Noncontact feeding facility for vehicle - Google Patents

Abstract

PURPOSE:To provide a noncontact feeding facility for a vehicle which can feed without contact and in which influence to an environment due to wirings is prevented. CONSTITUTION:A guide line 34 for supplying a sine wave current of a high frequency is laid along a guide rail B of a vehicle body V, a coil to be feed without contact from the line 34 is provided at the body V, the line 34 is formed by covering a litz wire with an insulator, and the line 34 is so connected to a power source M for supplying the sine wave current of the high frequency via a control multicore vinyl-insulated vinyl-sheathed cable 81 that directions of the currents flowing to adjacent insulated wires are reverse. Accordingly, an influence of a skin effect can be reduced by using the cable 81, and hence a large induction current can be supplied. The directions of the currents of the adjacent wires in the cable 81 are reversed to reduce leakage of a magnetic flux and to hence decrease influence to an environment.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply facility for contactlessly supplying power to a moving body.

[0002]

2. Description of the Related Art A conventional moving body and its power feeding device will be described with reference to FIGS. A transport vehicle body V as a moving body includes a drive trolley 1A, a driven trolley 1B, and an article transport carrier 1C supported by these trolleys 1A and 1B. A guide rail B for movably guiding the vehicle body V. Is provided.

The drive trolley 1A comprises a traveling wheel 2 which engages with an upper portion of a guide rail B, a steadying roller 3 which comes into contact with a lower portion of the guide rail B from both lateral sides, and a current collecting unit D.
And the traveling wheels 2 are driven by an electric motor 4 with a speed reducer. Further, the driven trolley 1B includes traveling wheels 5 that engage with the upper portions of the guide rails B, and steady rest rollers 6 that contact the lower portions of the guide rails B from both lateral sides.

The guide rail B is provided with a wheel guide portion 7 at its upper portion and a roller guide portion 8 at its lower portion, and is supported in a suspended state from the ceiling or the like by a support frame 9 connected to one lateral side. An energization rail unit U is attached to the side of the guide rail B other than the side to which the support frame 9 is attached.

The energizing rail unit U supplies electric power to the vehicle body V by three-phase alternating current and sends a traveling control signal to the vehicle body V.
And a pair of upper and lower engaging portions 11 provided on the guide rail B, the rail supporting frame 10 having four current-carrying rails L and supporting the current-carrying rails L in parallel. It is fastened with screws while being locked to.

The current-carrying rail L is, as shown in an enlarged view in FIG. 10 (b), a rail body 12 made of a conductive material such as copper.
And holder 13 made of non-conductive material such as synthetic resin
The holder 13 is provided with a pair of protective wall portions protruding from both lateral side portions of the rail body 12 toward the current collecting side.
Further, the current collecting contact surface of the rail main body 12 is formed as a recessed surface located on the inner side in the lateral direction of the rail.

The collector unit D, as shown in FIG.
Each energizing rail L is provided with a pair of current collectors 14
A pair of current collectors 14 for one current-carrying rail L are arranged at intervals in the front-rear direction of the vehicle body V, four current collectors 14 on the front side of the vehicle body are combined into one unit, and four current collectors 14 on the rear side of the vehicle body are similarly arranged. The electrons 14 are combined in one unit.

With the above structure, the vehicle body V of the moving body is supplied with power from the current-carrying rail L of the current-carrying rail unit U of the guide rail B via the current collector 14, and is driven by the electric motor 4 with a speed reducer. 2 is driven and guided by guide rail B to move.

[0009]

However, in such a conventional power feeding facility for a moving body, the rail main body of the current-carrying rail L is used.
Since the 12 and the current collector 14 wear due to contact with each other, there is a problem that maintenance is essential and dust is generated. Further, the conductive material (rail main body 12) of the energizing rail L is exposed, so that there is a risk of electric shock, and there is a problem that the spark cannot be used in the explosion-proof area.

In order to solve such a problem, a contactless power feeding facility as shown in FIG. 11 has been proposed. The contactless power supply equipment shown in FIG. 11 includes a primary core 21 fixed to a mobile charging station and a mobile station stopped at this station.
Secondary cores 23 vertically provided at the lower part of 22 are provided with magnetic paths facing each other with a gap length g, and are configured to transmit electric power.
That is, the primary core 21 provided at the charging station
When an alternating current is applied to the coil 24 wound around the coil 25, an electromotive force is generated in the coil 25 wound around the secondary core 23, and the alternating current generated in the coil 25 passes through the AC-DC converter 26. Are supplied to the battery 27, and the battery 27 is charged. Using the battery 27 as a drive power source, the moving body 22 drives the traveling wheels 28 to travel.

However, in such a structure, the battery is not charged unless it is stopped at the charging station, so that the work efficiency is low, and such a problem can be solved by laying the primary core 21 along the traveling path. However, it was difficult to manufacture and it was impossible in terms of cost. Furthermore, since the inductance on the primary side changes significantly due to changes in the gap length g,
Since the primary-side current value changes greatly and the secondary-side voltage value changes greatly, an overcurrent and an overvoltage may occur, and the protective device may operate and power may not be supplied.

The present invention solves the above problems,
It is an object of the present invention to provide a non-contact power feeding facility for a mobile body, which can feed power safely and stably without contact, and which prevents the influence of wiring from affecting the surroundings.

[0013]

In order to solve the above-mentioned problems, the contactless power feeding equipment for a mobile unit of the present invention has an induction line for passing a high frequency sine wave current along the mobile line of the mobile unit.
A non-contact power feeding facility for a moving body, wherein the moving body is provided with a coil to which electric power is fed from the dielectric line in a non-contact manner, wherein a twisted wire formed by collecting thin wires that insulate the induction line is formed by an insulator. It is characterized in that the induction line and the power supply device for supplying the high-frequency sinusoidal current are connected by a multi-core insulated cable in such a manner that the current flowing through each adjacent insulated wire is reversed. It is what

[0014]

According to the structure of the above invention, since the induction line of the moving line and the power supply device are connected by the multicore cable,
The influence of the skin effect is reduced and a large induced current can be passed. Also, by connecting the currents flowing through the adjacent insulated wires of the cable in the opposite direction, the magnetic flux leaking from the cable is reduced, thus reducing the influence on the surroundings, and the voltage drop and energy loss due to impedance are also generated. Is also prevented.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same components as those in FIGS. 9 and 10 of the conventional example are designated by the same reference numerals and description thereof will be omitted.

FIG. 1 is a side view of a contactless power supply equipment for a mobile body using the contactless power supply equipment of the present invention, and FIG. 2 is a partial sectional front view of the mobile body of the contactless power supply equipment. In the contactless power feeding equipment for a mobile body of the present invention, in the guide rail B, a guide line unit X is provided in place of the conventional rail unit U,
In the vehicle body V, a pickup unit P is provided in place of the current collecting unit D of the conventional example, and a power supply device M is further provided.

The guide line unit X is provided with a bracket 32 on which a pair of upper and lower hangers 31 are vertically projected at a predetermined interval along one side of the guide rail B. The bracket 32 is enlarged in FIG. As shown in the figure, a bag-shaped recess 31A is provided at the tip of the hanger 31, the start end is connected to the power supply M, and the end is connected to the recess 31A. The claw portion 33A of the cover 33 fitted in the longitudinal direction is inserted, and the guide line 34 is laid along the guide rail B. As shown in FIG. 3, the bracket 32 has its upper and lower ends fitted to the claw portions 7A and 8A that are respectively provided inwardly from the wheel guide portion 7 and the roller guide portion 8 of the guide rail B, The set screw 32B is engaged with the screw holes 32A provided at the upper and lower ends, and the tip of the set screw 32B is engaged with the guide rail B to fix the guide rail B. In addition, the cover 33 is supported between the covers 33 as shown in FIG.

As shown in FIG. 4, the guide line 34 is a twisted wire (hereinafter referred to as a litz wire) 71 formed by twisting a predetermined number of insulated thin wires (enameled wires in this embodiment).
7 are twisted around each other, and seven more twisted wires 73 are twisted around the core portion 72, and are covered with a cover 74 made of an insulating material such as a resin material. As described above, by configuring the induction line 34 with the litz wire 71, it is possible to reduce the influence of the skin effect due to the flow of a high-frequency current described later, and it is possible to flow a large induction current even in the induction line 34 having a small diameter.

When the two guide lines 34 are simply put together and wired from the guide rail B to the power supply device M, the magnetic flux (magnetic field) generated from the wiring (guide line 34) has a great influence on the surroundings, and the guide line 34 is also provided. Impedance occurs between 34, voltage drop occurs, and energy loss occurs due to heat generation. In addition, since the litz wire 71 formed from the enamel wire is used, it takes time and effort for wiring work, and such a two-piece cable is hard to obtain and costly.
In order to solve such a problem, a control multi-core vinyl-insulated vinyl sheath cable (hereinafter abbreviated as CVV multi-core cable) is provided between the guide line B of the guide rail B and the power supply device M.
Connected at 81. As shown in FIG. 5, a CVV multi-core cable 81 includes a plurality of insulated electric wires 83 each of which is formed by covering a conductor made of copper wire with a coating made of vinyl, and a tape 84.
And is covered with a coating 85 made of vinyl. Then, when connecting, as shown in FIG.
As shown in, the coating 85 from the center of the CVV multi-core cable 81
The electric wires 83 adjacent to each other are welded to the induction lines 34 so that the electric currents flow in different directions, and are covered with a cover material 82 for insulation from the outside. Thus, by using the multi-core cable 81, it is possible to obtain the same effect as that of the litz wire 71, and by alternating the current directions of the adjacent electric wires 83, The leakage of the magnetic flux can be reduced, and thus the influence of the magnetic flux on the surroundings can be reduced. Further, voltage drop due to impedance does not occur, and energy loss due to heat generation does not occur. Further, the CVV multi-core cable 81 is easy to obtain, inexpensive, and can reduce the cost. Further, since it is a vinyl film, it is possible to avoid the possibility of causing dielectric breakdown due to the enamel breakdown voltage.

As shown in FIG. 7, the pickup unit P includes five ferrites 35 having an E-shaped cross section, and a central convex portion 35A thereof is oriented laterally (in a direction along the guide rail B in FIG. 1). ), A ferrite plate 37 is placed on the convex portion 35A at the center of each ferrite 35, and the ferrite plate 37 and the ferrite plate 37 are fixed to the base body 39 by screws 39A via a nonmagnetic plate 38. Also, for example, 10
The litz wire 71 having about 20 turns is wound to form the pickup coil 36, and the mounting member 40 is mounted on the side portion of the base body 39. Further, urethane rubber 40A is inserted between the folded portions of the ferrite 35 and the plate 38 at both ends. As shown in FIG. 3 (a), the mounting member 40 allows the pickup unit P to be positioned so that the center L of the central convex portion 35A of the ferrite 35 of the pickup unit P is approximately at the center of the pair of guide lines 34 of the guide line unit X. , And is fixed to the vehicle body V by adjusting so as to be positioned vertically to the guide rail B. When the induction line 34 is energized (alternating current), an electromotive force is generated in the pickup coil 36.

The circuit configuration of the power supply device M and the vehicle body (moving body) V will be described with reference to the circuit diagram of FIG. The power supply device M is
AC200V 3-phase AC power supply 41, converter 42, sine wave resonance inverter 43, and transistor 44 for overcurrent protection
And a diode 45. The converter 42 is a diode 46 for full-wave rectification, and a coil that forms a filter.
47, a capacitor 48, a resistor 49, and a transistor 50 that short-circuits the resistor 49.
Are transistors 51 and 52 driven by a rectangular wave signal alternately oscillated as shown in the figure, a coil 53 for current limiting, a coil 54 for current supply connected to the transistors 51 and 52, It is composed of an induction line 34 and a capacitor 55 forming a parallel resonant circuit. The transistor control device is omitted.

Further, the vehicle body V is provided in parallel with the pickup coil 36, and is provided with a capacitor 56 which constitutes a resonance circuit which resonates at the frequencies of the pickup coil 36 and the induction line 34. diode
57, and a stabilized power supply circuit 58 for controlling the output to a predetermined voltage is connected to the diode 57.
Is connected to a load, for example, the motor 4 via an inverter 63. The stabilized power supply circuit 58 includes a current limiting coil 59, an output adjusting transistor 60, a diode 61 and a capacitor 62 that form a filter. The transistor control device is omitted.

The operation of the circuit configuration of the power supply device M, the guide line 34 and the vehicle body V will be described. First, the AC 200 V three-phase AC output from the AC power supply 41 is converted to DC by the converter 42, and the sine wave resonance inverter 43 generates a high frequency,
For example, it is converted into a sine wave of 10 kHz and supplied to the guide line 34 via the CVV multi-core cable 81. This guide line 34
The pickup coil of the vehicle body V located on the guide rail B resonating at the frequency of the guide line 34 due to the magnetic flux generated in the
A large electromotive force is generated in 36, and the alternating current generated by this electromotive force is rectified by the diode 57 to stabilize the power supply circuit 58.
Is supplied to the electric motor with speed reducer 4 via the inverter 63 after being regulated to a predetermined voltage by the electric motor 4, and the traveling vehicle 2 is driven by the motor 4 supplied with electric power.
Guided by guide rail B, it moves.

In this way, power can be supplied to the vehicle body V without contact, so that abrasion and dust of the current-carrying rail L as in the conventional case can be eliminated and maintenance-free can be realized. Further, the center L of the pickup coil 36 is the center of the pair of induction lines 34 of the induction line unit X,
The pickup coil 36 is generated in the guide line 34 because it is positioned perpendicular to the guide rail B and is adjusted and fixed so that the upper and lower protrusions 35B of the ferrite 35 are located above and below the guide line 34, respectively. The upper and lower protrusions of the ferrite 35, which has the highest magnetic flux density and has high magnetic permeability.
A magnetic path is generated in 35B, so that the largest electromotive force is induced and efficient power supply is possible.

Further, by using the covers 33, the guide lines 34 can be easily and surely laid along the guide rails B without hanging the guide lines 34 with one touch, and the cover joint material 29 is provided between the covers 33. By covering, the guide line 34 can be laid without hanging even during this period. Furthermore, by using the litz wire 71 in which thin wires insulated from the induction line 34 and the pickup coil 36 are gathered and twisted together, and by covering with the cover 33, the conductive portion is not exposed and safety can be improved, In addition, since the sparks disappear, there is no danger of fire, and it can be used in explosion-proof areas. Further, since a sinusoidal wave is fed to the induction line 34, harmonics are not generated and radio noise can be eliminated.

The pickup coil 36 is a guide rail B.
In the curved part of the vehicle body V without contacting the guide line 34
Can smoothly turn the curve. In addition, the ferrite 35 has a H-shaped cross section.
Center projection 35A of the Litz wire 71
By forming a pickup coil 36 by winding
Since the litz wire 71 is held by the convex portions at both ends, the litz wire 71 can be easily wound, and the work efficiency can be improved. Further, since the protrusions at both ends have a high magnetic permeability, a magnetic path is formed and a higher electromotive force can be generated.

In this embodiment, the vehicle body V that moves in the left-right direction is described, but the present invention can be similarly applied to a vehicle body (moving body) that moves in the vertical direction along the rail track, and the same effect can be obtained. Can be expected.

[0028]

As described above, according to the present invention, a multicore insulated cable is provided between the induction line of the moving line and the power supply device.
By connecting the currents flowing through the adjacent insulated wires in opposite directions, the magnetic flux leaking from the cable can be reduced and the influence on the surroundings can be reduced. Further, it is possible to prevent voltage drop and energy loss due to impedance. Further, by using the multi-core cable, the influence of the skin effect can be reduced and a large induced current can be passed.

[Brief description of drawings]

FIG. 1 is a side view of a main part of a non-contact power feeding facility for a moving body according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view of the contactless power supply equipment for the mobile unit.

FIG. 3 is a side view and a plan view of a bracket of the contactless power feeding facility of the mobile body.

FIG. 4 is a cross-sectional view of a guide line of the contactless power feeding facility of the mobile body.

FIG. 5 is a cross-sectional view of a CVV multi-core cable of the contactless power supply equipment for the mobile unit.

[Fig. 6] Induction line and CVV of the contactless power supply equipment of the same mobile unit
It is explanatory drawing which shows the connection of a multi-core cable.

FIG. 7 is a plan view, a front view, and a side view of a pickup coil of the contactless power feeding facility of the mobile body.

FIG. 8 is a circuit configuration diagram of a contactless power feeding facility of the mobile body.

FIG. 9 is a side view of a conventional moving body and a power feeding device.

FIG. 10 is a partial cross-sectional front view of a conventional moving body and a power feeding device.

[Fig. 11] Fig. 11 is a configuration diagram of a conventional non-contact power feeding facility for a mobile body.

[Explanation of symbols]

V Carrying body B Guide rail X Induction line unit P Pickup unit M Power supply unit 29 Cover joint material 31 Hanger 32 Bracket 33 Cover 34 Induction line 35 Ferrite 36 Pickup coil 37 Ferrite plate 43 Sine wave resonance inverter 56 Pickup coil and resonance circuit Capacitor to be formed 71 Litz wire 73 Core 74 Cover 81 Multi-core vinyl insulation vinyl sheath cable for control (CVV multi-core cable) 82 Cover material 83 Electric wire 84 Tape 85 Cover

Claims (1)

[Claims] 1. A mobile body comprising: an induction line for flowing a high-frequency sinusoidal current along a mobile line of the mobile body; and a coil for feeding the contactlessly from the dielectric line to the mobile body. A contact power supply facility, wherein a stranded wire formed by collecting thin wires that insulate the induction line is covered with an insulator, and the induction line and a power supply device that supplies the high-frequency sinusoidal current are connected to each other. , A multi-core insulated cable, in which the electric currents flowing through the adjacent insulated electric wires are connected in opposite directions, the non-contact power feeding equipment for a mobile body.