JP3261428B2 - Contactless power supply equipment for mobile objects - Google Patents

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 a mobile body.

[0002]

2. Description of the Related Art A conventional moving body and its power supply device will be described with reference to FIGS. The transporting vehicle body V as a moving body is composed of a driving trolley 1A, a driven trolley 1B, and an article transporting carrier 1C supported by these trolleys 1A and 1B. A guide rail B is provided.

The drive trolley 1A includes a traveling wheel 2 which is engaged with an upper portion of a guide rail B, a steady roller 3 which contacts a lower portion of the guide rail B from both sides, and a current collecting unit D.
And the traveling wheels 2 are driven by an electric motor 4 with a speed reducer. The driven trolley 1B includes a traveling wheel 5 that engages with the upper part of the guide rail B, and a steadying roller 6 that contacts the lower part of the guide rail B from both sides.

The guide rail B has a wheel guide 7 at its upper part and a roller guide 8 at its lower part. The guide rail B is suspended from a ceiling or the like by a support frame 9 connected to one lateral side. An energizing rail unit U is attached to the other side of the guide rail B from 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 outputs a traveling control signal to the vehicle body V.
A pair of upper and lower locking portions 11 provided on the guide rail B is provided with four energizing rails L, and a rail support frame 10 for supporting the energizing rails L in a parallel state. It is screwed in a state where it is locked.

As shown in FIG. 8B, the energizing rail L is a rail body 12 formed of a conductive material such as copper.
And a holder 13 formed of a non-conductive material such as a synthetic resin.
The holder 13 is provided with a pair of protective walls protruding from both lateral sides of the rail body 12 to the current collector side,
The collector contact surface of the rail body 12 is formed as a recessed surface that is located closer to the center in the rail width direction.

[0007] As shown in FIG.
Each of the energizing rails L is provided with a pair of current collectors 14.
A pair of current collectors 14 for one energizing rail L are located at an interval in the front-rear direction of the vehicle body V, and the four current collectors 14 at the front of the vehicle body are combined into one unit, and similarly, the four current collectors 14 at the rear of the vehicle body are combined. The electrons 14 are combined into one unit.

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

[0009]

However, in such a conventional power supply equipment for a mobile body, the rail main body of the power supply rail L is not provided.
Since the 12 and the current collector 14 are worn by contact with each other, maintenance is indispensable, and there is a problem that dust is generated. Furthermore, since the conductive material (rail main body 12) of the energizing rail L is exposed, there is a risk of electric shock, and furthermore, a spark is generated, so that it cannot be used in an explosion-proof area.

In order to solve such a problem, a non-contact power supply facility as shown in FIG. 9 has been proposed. The contactless power supply equipment shown in FIG. 9 includes a primary core 21 fixed to a charging station of a mobile unit, and a mobile unit stopped at this station.
A secondary core 23 vertically provided below the bottom 22 is provided with a magnetic path facing the gap length g to transmit electric power.
That is, the primary core 21 provided in the charging station
When an alternating current is applied to the coil 24 wound around the secondary coil 23, 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 an AC-DC converter 26. To the battery 27, and the battery 27 is charged. The moving body 22 travels by driving the traveling wheels 28 using the battery 27 as a driving power source.

However, in such a configuration, if the vehicle is not stopped once at the charging station, the battery is not charged, so that the work efficiency is poor. Further, if the primary core 21 is laid along the traveling path, such a problem can be solved. But difficult to make,
It was not possible in terms of cost. Furthermore, since the primary side inductance changes greatly due to the change in the gap length g, the primary side current value changes greatly, and the secondary side voltage value changes greatly, resulting in overcurrent and overvoltage, and protection. In some cases, the device operated and could not supply power. Also, FIG.
When the secondary core 23 shown in FIG. 9 is attached to the vehicle body V shown in FIG. 8, the secondary core 23 and the guide rail B come into contact with each other in the vertical curved portion and the horizontal curved portion of the guide rail B. Therefore, there is a problem that the bending R of the curved portion is restricted, and the route for laying the guide rail B is also restricted.

The present invention solves the above problem,
It is an object of the present invention to provide a non-contact power supply equipment of a mobile body that can supply power safely and stably without contact and that can freely select a bending R of a curved portion.

[0013]

In order to solve the above-mentioned problems, a contactless power supply system for a moving body according to the present invention comprises a pair of induction lines for flowing a high-frequency sinusoidal current along a moving path of the moving body. A non-contact power supply equipment for a moving body, wherein the moving body includes a coil positioned between the dielectric lines and supplied with power from a guide line in a non-contact manner, wherein the horizontal traveling portion of the moving body and upper and lower
In the direction curve running section , the laying angle of the pair of guide lines is
A first coil that is rotated by 90 degrees and is supplied to the moving body without contact from a guide line of a horizontal traveling unit of the moving body;
A second coil is provided that is supplied with power from an induction line of a vertical curve running section in a contactless manner.

[0014]

According to the structure of the present invention, when the guide line is energized (alternating current), an electromotive force is generated in the coil of the moving body, so that power is supplied to the moving body in a non-contact manner, and the moving body travels along the moving path. I do. Further, the vertical direction and the horizontal run of the moving body of the moving path
In the curve running section , the laying angle of the pair of guide lines 34 is rotated by 90 degrees, so that the first coil located in the middle of the vertical guide line in the horizontal running section becomes in the vertical curve running section . , Avoiding contact with the induction track,
It is possible to freely select the vertical curve angle of the vertical curve running part , and the second coil located in the middle of the left and right direction guide line in the vertical curve running part is connected to the guide line in the horizontal running part. Contact is avoided, so that the left and right curve angles of the horizontal traveling section can be freely selected.

[0015]

An embodiment of the present invention will be described below with reference to the drawings. The same components as those in FIGS. 7 and 8 of the conventional example are denoted by the same reference numerals, and description thereof will be omitted.

FIG. 1 is a side view of a drive trolley and a guide rail of a transfer vehicle body V of a non-contact power supply equipment for a moving body according to an embodiment of the present invention, and FIG. 2 is a partially sectional front view of the drive trolley and a guide rail. It is.

In the non-contact power supply equipment for a moving body according to the present invention, guide line units X and Y are provided in place of the current-carrying rail unit U of the conventional example. Instead, two pickup units P are provided, and a power supply device M shown in FIG. 3 is further provided.

The drive trolley 1A includes a traveling wheel 2 'engaged with the upper part of the guide rail B, a steadying roller 3' contacting from both the upper and lower lateral sides of the guide rail B and from below, and a 90-degree roller. Two pickup units P having different mounting angles are provided, and the traveling wheels 2 'are driven by an electric motor 4' with a reduction gear.

The first guide line unit X laid on the horizontal running portion of the vehicle body V of the guide rail B has a pair of upper and lower hangers 31 at predetermined intervals along one side of the guide rail B along the guide rail B. A bracket 32 having a vertically protruding portion is attached. As shown in an enlarged view in FIG. 4, a bag-shaped concave portion 31A is provided at the tip of the hanger 31, and the starting end is connected to the power supply device M in the concave portion 31A. The tab 33A of the cover 33 in which a loop-shaped guide line 34 having a different conduction direction connected to the end is fitted in the longitudinal direction is inserted, and the guide line 34 is laid along the guide rail B. Have been. As shown in FIG. 4, the upper and lower ends of the bracket 32 are fitted to claw portions 7A and 8A protruding inward from the wheel guide portion 7 and the roller guide portion 8 of the guide rail B, respectively. A screw 32B is screwed into a screw hole 32A provided at the upper and lower ends, and the tip is bitten into the guide rail B, thereby fixing the screw.

Also, the guide rail B is mounted on the vehicle body V in the vertical direction.
As shown in FIG. 2 and FIG. 3, the second guidance line unit Y laid on the traveling section (hereinafter referred to as a vertical traveling section)
The first guide line unit X is laid at an angle of 90 degrees with respect to the first guide line unit X, and the bracket 32 is attached with the hanger 31 facing downward at predetermined intervals on the ceiling along the guide rail portion B, Guide line in recess 31A of hanger 31
The guide 33 is formed along the guide rail B by inserting the claws 33A of the cover 33 in which the cover 34 is fitted in the longitudinal direction.

With the above configuration, the horizontal traveling unit and the vertical traveling unit
In this case, the laying angle of the pair of guide lines 34 is rotated by 90 degrees , and the guide lines 34 are continuously laid across the guide line units X and Y as shown in FIG. The guide line 34 is configured by covering a twisted wire (hereinafter, referred to as a litz wire) formed by collecting insulated thin wires with an insulator, for example, a resin material.

As shown in FIG. 5, the pickup unit P is composed of five ferrites 35 each having an E-shaped cross section and a central convex portion 35A arranged side by side. A ferrite plate 37 is placed, and the ferrite plate 37 and the base body 39 are passed through a non-magnetic plate 38.
Is fixed with a screw 39A. The litz wire of, for example, 10 to 20 turns is wound around the upper and lower surfaces of the central convex portion 35A of the ferrites 35 arranged in the horizontal direction to form the pickup coil 36, and the mounting member is attached to the side of the base body 39. 40
It is configured by attaching. In addition, ferrite 35
And a urethane rubber 40A is inserted between the folded portions of the plate 38.

As shown in FIG. 2, one of the pickup units P constructed as described above has a center L of the central protruding portion 35A of the ferrite 35 of the pickup unit P substantially equal to the induction line unit X, as shown in FIG. The center of the pair of guide lines 34 is adjusted to be perpendicular to the guide rail B and fixed to the side surface of the drive trolley 1A of the vehicle body V, and the other is connected to the ferrite 35 of the pickup unit P. Is adjusted so that the center L of the central convex portion 35A is substantially at the center of the pair of guide lines 34 of the guide line unit Y, and is fixed upward to the upper surface of the drive trolley 1A of the vehicle body V.

When an electric current is applied to the induction line 34 (alternating current), an electromotive force is generated in the pickup coil 36 of the pickup unit P. 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 M is an AC 200 V three-phase AC power supply.
41, a converter 42, a sine wave resonance inverter 43, a transistor 44 and a diode 45 for overcurrent protection. The converter 42 is a diode 46 for full-wave rectification.
And the coil 47, capacitor 48, and resistor that constitute the filter
The sine wave resonance inverter 43 is composed of a transistor 50 that is driven by a rectangular wave signal that is oscillated alternately as shown in the figure.
51, 52, a current limiting coil 53, a transistor 51,
It comprises a current supply coil 54 connected to 52, and a capacitor 55 forming a parallel resonance circuit with the induction line 34. Note that the transistor control device is omitted.

In the vehicle body V, two pickup units P are connected in parallel, and a capacitor 56 constituting a resonance circuit that resonates with the frequency of the pickup coil 36 and the induction line 34 is provided in parallel with the pickup coils 36. A rectifying diode 57 is connected in parallel to the capacitor 56 of the resonance circuit, and a stabilized power supply circuit 58 for controlling the output to a predetermined voltage is connected to the diode 57. A load, for example, an inverter 63 is connected to the stabilized power supply circuit 58. And the motor 4 'is connected via the. 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 constitute a filter. Note that the transistor control device is omitted.

The operation of the power supply device M, the guide line 34, and the vehicle V will be described. First, AC 200 V three-phase AC output from the AC power supply 41 is converted into DC by the converter 42,
For example, it is converted into a 10 kHz sine wave and supplied to the induction line 34.

First, in the horizontal traveling section of the guide rail section B, the guide line 34 located in the first guide line unit X is used.
The pickup coil 36 of the pickup P on the side surface of the vehicle body V that resonates with the frequency of the induction line 34 due to the magnetic flux generated at
A large electromotive force is generated, and the AC current generated by the electromotive force is rectified by a diode 57, regulated to a predetermined voltage by a stabilized power supply circuit 58, and supplied to an electric motor 4 'with a reducer via an inverter 63. The supplied vehicle body V is driven by the supplied motor 4 ′ to drive the traveling wheels 2 ′ and guided by the guide rail B to move.

Next, when the vehicle body V hangs on the vertical traveling portion of the guide rail section B, the magnetic flux generated in the guide line 34 located in the second guide line unit Y causes the vehicle body V to resonate at the frequency of the guide line 34. A large electromotive force is generated in the pickup coil 36 of the pickup P on the upper surface of the vehicle, and the vehicle body V of the moving body is similarly guided and moved by the guide rail B.

As described above, power can be supplied to the vehicle body V in a non-contact manner, so that the conventional energizing rail L can be prevented from abrasion and generation of dust, and maintenance-free can be realized. In addition, the horizontal traveling part and the vertical traveling part
By rotating the laying angle of the pair of guide lines 34 by 90 degrees , the pickup unit P (first coil) fixed to the side surface of the vehicle body V is prevented from contacting the guide lines 34 in the vertical traveling section. Accordingly, the vertical curve angle of the vertical traveling portion can be freely selected, and the pickup unit P (second coil) similarly fixed to the upper surface of the vehicle body V
Is prevented from contacting the guide line 34 in the horizontal traveling section, so that the left and right curve angles of the horizontal traveling section can be freely selected. Therefore, the degree of freedom in setting the route for laying the guide rail B can be increased. Further, the center L of the ferrite 35 of the pickup unit P, that is, the center of the pickup coil 36 is connected to the induction line unit X,
The pickup coil is adjusted and fixed such that the protrusions 35B at both ends of the ferrite 35 are positioned vertically at the center of the pair of guide lines 34 of Y and on the sides of the pair of guide lines 34, respectively. Reference numeral 36 is located at a position where the magnetic flux density generated in the induction line 34 is the largest, and a magnetic path is generated in the protrusion 35B of the ferrite 35 having a high magnetic permeability, so that the largest electromotive force is induced and power can be supplied efficiently.

Further, the pickup coil 36 is formed by winding a litz wire around the central convex portion 35A of the ferrite 35 having the H-shaped cross section by the ferrite plate 37 over the concave portions on the upper and lower surfaces, thereby forming the convex portions at both ends. Since the litz wire is held by the portion, the litz wire can be easily wound, and work efficiency can be improved. Further, since the protrusions at both ends have high magnetic permeability, a magnetic path is formed, and a higher electromotive force can be generated.

Further, the guide line 34 and the pickup coil 36
Use litz wire covered with insulator for
By covering with 33, the conductive portion is not exposed, and the safety can be enhanced. Further, since the spark is not generated, there is no danger such as fire, and it can be used in an explosion-proof area. Further, since a sine wave is supplied to the induction line 34, no harmonic is generated, and generation of radio noise can be eliminated.

In this embodiment, the second guide line unit Y is laid only in the vertical portion, but it is also possible to increase the power by laying it continuously above the horizontal portion. .

In this embodiment, the vehicle V guided by the guide rail portion is described. However, the present invention is similarly applied to a moving body traveling on a fixed path on a floor surface having undulations. be able to.

[0035]

As described above, according to the present invention, in the horizontal traveling section and the vertical curve traveling section , the laying angle of the pair of guide lines is turned by 90 degrees, thereby guiding the horizontal traveling section of the moving body. The first coil, which is fed from the line without contact, is above
In the downward curve traveling section , contact with the guide line is avoided, so that the vertical curve angle of the vertical curve traveling section can be freely selected, and the vertical movement of the moving body can be selected.
A second coil in the horizontal running portion fed contactlessly from induction lines over blanking the travel unit, which avoids contact with the induction line, thus it is possible to select the right curve angle of horizontal running portion freely, Therefore, the degree of freedom in setting the route of the moving route can be increased.

[Brief description of the drawings]

FIG. 1 is a side view of a moving body driving trolley and a guide rail of a non-contact power feeding facility of a moving body according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional front view of a moving body driving trolley and a guide rail of the non-contact power supply equipment of the moving body.

FIG. 3 is a partial schematic side view of a non-contact power supply facility of the moving body.

FIG. 4 is a front view and a side view of a bracket portion of the contactless power supply equipment of the moving body.

FIG. 5 is a plan view, a front view, and a side view of a pickup coil of the contactless power supply equipment of the moving object.

FIG. 6 is a circuit configuration diagram of a non-contact power supply facility of the moving body.

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

FIG. 8 is a partial cross-sectional front view of a conventional moving body and a power supply device.

FIG. 9 is a configuration diagram of a conventional wireless power transfer facility for a mobile object.

[Explanation of symbols]

V Car body (moving body) 1A Drive trolley B Guide rail (moving path) X, Y Guidance line unit P Pickup unit M Power supply unit 31 Hanger 32 Bracket 33 Cover 34 Guidance line 35 Ferrite 36 Pickup coil 37 Ferrite plate 43 Sine wave Resonant inverter 56 Capacitor forming resonant circuit with pickup coil

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60L 5/00 B60M 7/00 B65G 43/00 H02J 17/00

Claims (1)

(57) [Claims] 1. A pair of induction lines through which a high-frequency sine wave current flows along a moving path of a moving body, and
A non-contact power supply device for a moving body provided with a coil that is positioned between the dielectric lines and is contactlessly supplied with power from an induction line, wherein a horizontal traveling section and a vertical curve traveling section of the moving body include:
Rotating the laying angle of the pair of guide lines by 90 degrees, supplying a first coil to the movable body without contact from a guide line of a horizontal traveling portion of the movable body, and a vertical curve of the movable body;
A non-contact power supply equipment for a moving body, comprising a second coil which is supplied with power from a guide line of a traveling section in a non-contact manner.