JPH05207604A - Noncontact power supply for moving object - Google Patents

Abstract

PURPOSE:To realize stabilized safety power supply by laying an induction line connected with a high frequency sine wave resonance inverter along a guide rail and fixing a coil to the body along the induction path such that the center of the coil is located normal to the rail in the center of a pair of vertical induction line. CONSTITUTION:A litz wire is wound across the recesses in the upper and lower surfaces of a laterally elongated ferrite 35 having H-shaped cross-section thus forming a pickup coil 36. A ferrite board 37 is then fixed to the body side of the ferrite 35 and further fixed through a fixing member 38 to a pair of supporting members 39 projecting from the body to the guide rail side. The ferrite 35 is fixed such that the center thereof is located normal to the guide rail in the center of 8 pair of ducts 33. Consequently, flux is produced in an induction path 34 to induce electromotive force in the coil 36 thus realizing noncontact power supply even during travel of moving object. Furthermore, power can be fed efficiently because the coil 36 is located at a position where the flux density in the induction path 34 is highest.

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 facility for a mobile body, and more particularly to a non-contact power feeding facility for a self-propelled carriage that guides a load to transport a load.

[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, and a guide rail B for movably guiding the vehicle body V. And are 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. 8B, 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 current collecting 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 supply facility as shown in FIG. 9 has been proposed. The non-contact power supply equipment of FIG. 9 includes a primary core 21 fixed to a mobile charging station and a mobile station stopped at this station.
A secondary core 23 vertically provided at the lower part of 22 is provided with a magnetic path provided so as to face each other with a gap length g, and power is transmitted.
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. The moving body 22 drives the traveling wheels 28 to travel by using the battery 27 as a drive power source.

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 that can feed power safely and stably without contact.

[0013]

In order to solve the above-mentioned problems, a contactless power supply equipment for a moving body according to the present invention comprises a pair of upper and lower portions horizontally projected along one lateral side of a rail track on which the moving body travels. At the tip of the hanger, an induction line for passing a high-frequency sine wave current is stretched, and a coil formed by winding a coil on the magnetic member over the upper and lower surfaces of the moving body is formed. It is characterized in that the coil is mounted perpendicularly to the rail track along the guide line and at the center of the coil in the vertical direction of the pair of guide lines.

[0014]

With the configuration of the above invention, an electromotive force is generated in the coil of the moving body by the magnetic flux generated in the induction line,
The mobile body is contactlessly supplied with power even while traveling, and is guided by the rail track to travel. Also, since the center of the coil is mounted vertically to the rail track at the center of the pair of upper and lower induction lines, the coil is located at the position where the magnetic flux density generated in the induction line is the largest and the largest electromotive force is induced. , Is efficiently powered. Moreover, the coil does not come into contact with the guide line even at the curved portion of the rail track, and the vehicle body can smoothly bend at the curved portion.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. The same configurations as those in FIGS. 7 and 8 of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

FIG. 1 is a side view of a non-contact power feeding facility for a mobile unit according to the present invention, and FIG. 2 is a partial sectional front view of a non-contact power feeding facility for a mobile unit according to the present invention. In the non-contact power feeding equipment for a moving body of the present invention, the guide rail B is provided with the guide line unit X in place of the conventional energizing rail unit U, and the vehicle body V is replaced with the conventional collector unit D in the pickup unit. P is provided, and the 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 predetermined intervals along one side of the guide rail B. A duct 33 made of resin is stretched at the tip end along the guide rail B, and each duct 33 has a loop-shaped guide line 34 having a starting end connected to the power supply device M and an end connected to different energization directions. It is laid and configured. The guide line 34 is formed by covering a stranded wire (hereinafter referred to as a litz wire) formed by collecting insulated thin wires with an insulator, for example, a resin material.

Further, as shown in FIG. 3, the pickup unit P is a ferrite, which is a magnetic member and has a cross section that is long in the lateral direction of the H shape (the direction along the guide rail B in FIG. 2).
35, the pickup coil 36 is formed by winding the litz wire of, for example, 10 to 20 turns over the recesses on the upper and lower surfaces,
A ferrite plate 37 is attached to a side portion of the ferrite 35 on the vehicle body V side, and plate-like attachment members 38 are vertically attached to both ends of the ferrite plate 37. As shown in FIG. 3 (c), the mounting member 38 has a vertically long mounting hole 38 with semicircular ends.
A is provided. The mounting member 38 and a pair of support members 39 protruding from the vehicle body V toward the guide rail B are connected by bolts 40A penetrating between the respective mounting holes 38A, 39A, and the center L of the ferrite 35 of the pickup unit P is connected. Is located at the center of the pair of ducts 33 of the guide line unit X and is perpendicular to the guide rail B, the pickup unit P is rotated as indicated by the arrow, and is vertically moved to adjust the nut. It is fixed to the vehicle body V by tightening 40B. Energize the induction line 34 (AC)
Then, 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 rectangular wave signals alternately oscillated as shown in the figure, a coil 53 for current limitation, 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. The capacitor 56 of the resonance circuit is provided in parallel for rectification. 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 10 kHz sine wave and supplied to the induction line 34. Due to the magnetic flux generated in the guide line 34, a large electromotive force is generated in the pickup coil 36 of the vehicle body V located on the guide rail B that resonates at the frequency of the guide line 34, and the alternating current generated by the electromotive force is generated by the diode 57. Is rectified by the stabilized power supply circuit 58, regulated to a predetermined voltage by the stabilized power supply circuit 58, and supplied to the electric motor 4 with a speed reducer via the inverter 63. 2 is driven and guided by guide rail B to move.

As described above, 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, since the center L of the pickup coil 36 can be adjusted so as to be positioned vertically to the guide rail B at the center of the pair of ducts 33 of the guide line unit X, the pickup coil 36 is fixed as shown in FIG. The coil 36 is located at the position where the magnetic flux density generated in the guide line 34 is the largest, the largest electromotive force is induced, and power can be efficiently supplied. The pickup coil 36 also contacts the guide line 34 in the curved portion of the guide rail B. Without this, the vehicle body V can smoothly bend the curved portion. Further, by winding the litz wire over the ferrite 35 having an H-shaped cross section over the recesses on the upper and lower surfaces to form the pickup coil 36, the litz wire is held by the protrusions at both ends, thereby winding the litz wire. It becomes easier and the work efficiency can be improved. Furthermore, since the protrusions at both ends have a high magnetic permeability, a magnetic path is formed and a higher electromotive force can be generated.

Since the length of the induction line 34 is much longer than the length of the pickup coil 36, the length of the pickup coil 36 is 100 m relative to the length of the pickup coil 36, for example.
Since it is 10 to 15 cm, the primary side inductance of the induction line 34 is almost constant, and the capacitor 55 of the power supply device M is
Since the induction line 34 and the induction line 34 form a resonance circuit, it is possible to pass a sinusoidal primary current at a high frequency with a large constant current value in the induction line 34.
Since the secondary side of 36 serves as a resonance circuit, as shown in FIG. 6, at the resonance frequency f _o , a large voltage v (in the figure
(1000 to 2000 V) occurs and the gap length between the induction line 34 and the pickup coil 36 changes, or the frequency of the induction line 34 fluctuates somewhat, the resonance frequency on the secondary side is still the frequency of the induction line 34. Frequency f _{1 to} f ₂
In this range, a secondary voltage higher than a predetermined value (300 V in the figure) can be generated, and a large amount of power can be stably supplied. Therefore, the gap length can be roughly adjusted, workability is improved, and manufacturing can be facilitated. Further, since the core is not required on the primary side, the line can be easily laid at low cost.

Further, the induction line 34 and the pickup coil 36
By using a litz wire covered with an insulator for the part, the conductive part is not exposed and safety can be improved.Because the spark does not disappear, there is no danger of fire, etc., and it is also used in explosion-proof areas. It becomes possible to do. Further, since a sinusoidal wave is fed to the induction line 34, harmonics are not generated and radio noise can be eliminated.

Although the two guide lines 34 are laid on the guide rail B in this embodiment, if the two guide lines 34 cannot be laid on the guide rail B, only one guide line 34 is laid. The guide coil B may be laid along the guide rail B, and the other guide line 34 may be routed through another route so that the pickup coil 36 moves in proximity to only one guide line 34. Needless to say, the power is turned off at this time. Further, by laying two or more guide lines 34 on the guide rail B, power can be increased.

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

Further, in this embodiment, the mounting position of the pickup unit P is adjusted by the structure of the mounting hole 38A of the mounting member 38, but the structure is not limited to such a structure, and the mounting of the pickup unit P is not limited to this. Any structure that can adjust the position may be used.

[0028]

As described above, according to the present invention, electromotive force is generated in the coil, and the moving body is contactlessly supplied with electric power even while the vehicle is running. Can be eliminated and maintenance-free can be realized. Also, since the center of the coil is mounted vertically to the rail track at the center of the pair of upper and lower induction lines, the coil is located at the position where the magnetic flux density generated in the induction line is the largest and the largest electromotive force is induced. ,
Power can be supplied efficiently. Moreover, the coil does not come into contact with the guide line even at the curved portion of the rail track, and the vehicle body can smoothly bend at the curved portion. Further, since the current flowing through the line is a sine wave, harmonics do not occur and radio noise can be eliminated. Further, since the core is not required on the primary side, the line can be easily laid at low cost.

[Brief description of drawings]

FIG. 1 is a side view of a non-contact power feeding facility for a mobile 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 plan view, a front view, and a side view of a pickup coil of the contactless power feeding facility of the mobile body.

FIG. 4 is a circuit configuration diagram of a contactless power feeding facility of the mobile body.

FIG. 5 is a side view of a pickup coil of the contactless power supply equipment for the mobile unit.

FIG. 6 is a secondary side frequency-electromotive force characteristic diagram of the contactless power supply equipment for the mobile unit.

FIG. 7 is a side view of a conventional moving body and a power feeding device.

FIG. 8 is a partially sectional front view of a conventional moving body and a power feeding device.

FIG. 9 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 34 Induction line 35 Ferrite 36 Pickup coil 37 Ferrite plate 38 Mounting member 39 Supporting member 40 Bolts and nuts 43 Sine wave resonance inverter 56 Pickup coil and resonance circuit Forming capacitor

Claims (1)

[Claims] 1. A pair of upper and lower hangers horizontally projecting along one lateral side of a rail track on which a moving body travels,
A coil formed by winding a coil over the upper and lower surfaces of a magnetic member on the moving body by extending an induction line through which a high-frequency sinusoidal current is passed, and the coil portions of the upper and lower surfaces of the coil are along the induction line. A non-contact power feeding facility for a moving body, characterized in that the center of the coil is installed substantially vertically at the center of the pair of guide lines and is perpendicular to the rail track.