JPH0993841A - Noncontact feeder system for ground mobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To feed a ground mobile with a required power stably through a noncontact system even if the ground mobile is traveling on a long distance. SOLUTION: In a system for feeding a ground mobile 30 with power through electromagnetic induction between the primary, i.e., an exciting line 20 passing a high frequency current, and the secondary, i.e., coils 35 wound around a plurality of cores 34 disposed in the ground mobile 30, a plurality of sets of exciting line unit 21, each comprising a predetermined length of exciting line 21b having an end part connected with a power supply, are arranged on the exciting line 20 at a predetermined interval X in the longitudinal direction. A plurality of pickups 33, each comprising the core 34 and coil 35, are arranged in in the ground mobile 30 along the exciting line 21b and the interval Y of core 34 is set longer than the interval V.

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 apparatus for a ground vehicle traveling along a road, and more particularly to a non-contact power feeding apparatus for a ground vehicle traveling on a long-distance road.

[0002]

2. Description of the Related Art Conventionally, as a method of supplying power to a ground moving body such as a carrier truck which carries a luggage and travels along a preset traveling path, a trolley wire arranged along the traveling path is used as a truck. A method of collecting electricity with a collector provided, a method of collecting electricity with a trolley path duct arranged on the traveling path with shoes on the dolly side, and a power supply method of moving a power supply cable connected to the dolly with the dolly by a cable carrier mounted on this Alternatively, there is a method of winding a cable on a traveling road with a cable reel provided on a carriage. However, each of the above methods has drawbacks such as wear of parts, enlargement of the power feeding device, and disconnection of the cable.

The following devices have been developed in order to eliminate such drawbacks. That is, there is one in which an induction line for flowing a high-frequency sinusoidal current is laid along a traveling path that guides a ground vehicle, and a pickup coil for resonating at the frequency of the induction line and generating an electromotive force is provided on the ground vehicle. .

An electromotive force is generated in the pickup coil, and the alternating current generated by the electromotive force is converted into a predetermined voltage and supplied to the load of the ground moving body. As a result, the ground moving body is configured to be contactlessly supplied with electric power and to travel even during traveling.

[0005]

However, the distance of the traveling path to which the ground vehicle is contactlessly fed with power is 100 m.
If the length becomes longer than the above, the inductance of the induction line becomes large. Therefore, the higher the frequency, the higher the line impedance, and the more difficult the current flows.

Therefore, when the voltage supplied to the induction line is constant, if the length of the induction line becomes long, the current required for supplying power to the ground moving body cannot be supplied, and the necessary power supply cannot be performed. was there. Therefore, 100V
With a high frequency power supply of ~ 200 V, the length of the excitation line that can provide the required power supply was limited to about several tens to 100 m.

Therefore, the invention according to claim 1 of the present invention supplies electric power required for the ground moving body even when the traveling path is a long distance of 100 m or more, and easily copes with extension of the traveling path. It is an object of the present invention to provide a contactless power feeding device for a ground moving body that is made possible.

According to the second aspect of the invention, in addition to the object of the first aspect of the invention, even if the pickup fails, there is no power outage and the ground vehicle can always run stably. It is an object to provide a non-contact power feeding device for a mobile body.

In addition to the object of the invention described in claim 1 or 2, the invention according to claim 3 excites a plurality of ground moving bodies even if the shape of the iron core located between the two excitation lines is different. It is an object of the present invention to provide a non-contact power feeding device for a ground moving body, which is capable of passing between line units without any trouble.

[0010]

In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is an excitation line which is arranged along a traveling path on which a ground vehicle travels and which supplies a high frequency current. In the non-contact power feeding apparatus for a ground vehicle, which uses a pickup provided on the ground vehicle as a secondary side to feed power to the vehicle by electromagnetic induction, the excitation line includes an excitation line of a predetermined length and its base. An end portion is connected to a high frequency power source to form one set of excitation line units, and a plurality of sets of the excitation line units are arranged at a predetermined interval in the traveling direction of the ground vehicle to form an excitation line for the entire traveling section. In addition, a plurality of the pickups are provided so as to face the excitation line, and the spacing between the pickups is larger than the spacing between the adjacent excitation line units.

According to a second aspect of the present invention, in the configuration of the first aspect of the invention, "the interval between the pickups is larger than the interval between adjacent exciting lines", "the ground vehicle is A plurality of pickups provided to face the excitation line and a battery for operating when the pickups have a power failure.

According to a third aspect of the present invention, in the invention according to the first aspect, "the distance between the pickups is made larger than the distance between the adjacent excitation lines", the end of the excitation line can pass the pickup. It is characterized by having a bent portion.

[0013]

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, referring to the drawings,
A non-contact power feeding device for a ground vehicle according to the described invention (hereinafter,
An embodiment of a first invention device) will be described.
1 is an external perspective view showing an essential part of the first invention device, FIG. 2 is a plan view illustrating an essential part of the device, and FIG. 3 is a front view of FIG.
FIG. 4 is a side view taken along the line AA of FIG. 2, and FIG. 5 is an electric circuit diagram of a non-contact power feeding device for a ground moving body. For convenience,
FIG. 1 shows the invention device according to claim 3 in parallel, and FIG. 5 also shows the invention device according to claim 2 in parallel.

6 to 13 are views for explaining different embodiments of the excitation line unit and the iron core for pickup, FIG. 6 is a front view of a single-winding excitation wire, and FIG. 7 is B- of FIG. FIG. 8 is a sectional view taken along line B, FIG. 8 is a front view of the double-winding excitation wire, FIG. 9 is a sectional view taken along line CC of FIG. 8, and FIG. 10 is a cross-sectional view taken along the line DD of FIG. 10, FIG. 12 is an exemplary plan view of an excitation line circuit formed of a curved path and a straight path, and FIG.
It is a -E line sectional view.

The first invention device comprises an excitation line 20 including a power supply device 50 provided on the fixed side 10 and a power supply section 40 provided on the ground moving body 30. A power supply device 50 is installed on the fixed side 10, and a traveling rail 11 forming a traveling path of the ground moving body 30 is laid on the floor surface as shown in FIG. A hanger 12 having a U-shaped cross-section when viewed from the side is provided on one side of the traveling rail 11.

A holder (not shown) made of resin is attached to the tip of the hanger 12, and one exciting wire 21b (as shown in FIG. 4 described later) is held on the holder. The hanger 12 and the holder are made of a plastic insulator, and are arranged over substantially the entire length of the traveling rail 11 except for the ends of the excitation line 20 (described later).

The excitation line 20 is composed of a plurality of sets of excitation line units 21, 22, .... One set of the excitation line unit 21 connects two excitation lines 21b, which are closely arranged to face each other over a predetermined length L, and the base end 21a thereof to the high frequency power supply device 50, and the ends thereof are integrally connected. Is configured.

Since the currents flow in the two exciting lines 21b in the opposite directions as shown by the black arrows in FIG. 1, the inductance is smaller than that in the case of one exciting line, but the exciting line length is still. It becomes large according to.

However, as described above, when the traveling distance of the ground moving body becomes long, the required excitation line length cannot be obtained with only one excitation line unit 21, so that it is necessary to install a plurality of excitation line units in parallel. There is.

Therefore, the excitation line units 21, 22, ... Having the same configuration are arranged in the traveling direction of the ground moving body 30 at a predetermined interval X, and the respective excitation line units 21, 22 ,. ..Individual power source coordination 51,
52 (..., 50 when collectively referred to). However, when power is supplied to two adjacent excitation line units, the power supply device may be shared.

As the exciting wire 21b, for example, a litz wire is used.

As shown in FIG. 4, the ground moving body 30 includes a frame 31 on which an object to be transported is placed, a bracket 32 vertically mounted on the frame, a pickup 33 attached to the tip of the bracket 32, and a power source section. 40 and. In the figure, 36 is a traveling wheel, 37 is a guide wheel, and the ground moving body 30 travels in the direction shown by the white arrow in FIG.

The pickup 33 comprises an iron core 34 and a pickup coil 35 wound around the iron core 34.
The iron core 34 is made of ferrite, has a side view cross section formed in an E shape, and the yoke portion of the iron core 34 is fixed to the bracket 32.

As shown in FIG. 4, a pickup coil 35 formed by winding a litz wire is provided on the central leg of the iron core 34. An opening 34a is formed in the opening direction of the pickup coil 35 between the outer peripheral surface of the pickup coil 35 and the inner surfaces of both legs of the iron core 33.

The width W of the opening 34a is formed so as to be larger than the size of the holder 13 so as not to come into contact with the exciting wire 21b due to the swing of the carriage. The excitation line 21b is set to be located at the center of the opening 34a.

A plurality (two in the illustrated example of FIGS. 1, 2, and 3) of the iron cores 34 are arranged at intervals Y along the traveling path. The interval between the iron cores 34, that is, the interval Y between the adjacent pickups 33 is set to be larger than the interval X between the adjacent excitation line units 21 and 22.

As shown in FIG. 5, the power supply unit 40 comprises a tuning circuit 401 formed by the pickup coil 35 and a tuning capacitor C2 connected in parallel with the pickup coil 35, a rectifying circuit 402 and an inverter 404, and supplies power to a load 405. are doing. 403 in the figure will be described later.

The power supply unit 50 is single-phase at a high frequency inverter, for example of the three-phase AC power supply 200V, 50 / 60H _Z 20
And outputs the 0V10KH _Z. An exciting wire tip portion 21a and a tuning capacitor (not shown) are connected to the output end of the high frequency inverter, and a predetermined high frequency exciting current is supplied to the exciting wire unit 21.

Further, since the amount of current collection decreases in the joint section of the excitation line units 21 and 22, a position sensor such as a proximity switch, a photoelectric sensor, or a magnetic sensor is provided during the interval X, and the ground sensor is provided. The passage of a moving body is detected, and a load unrelated to the traveling of the ground moving body is restricted so as not to apply a load.

Next, the operation of the first invention device will be described. The 200V three-phase AC output from the AC power supply is the power supply device 50.
The example is provided to 10KH _Z of the high-frequency sine wave converted each excitation line units 21 and 22 ..., the high-frequency magnetic field is generated in FIG. 4 the arrow direction to the excitation line 21b, the magnetic flux in the central leg of the core The voltage is concentrated and a voltage is generated in the pickup coil 35.

Then, the tuning circuit 401 causes the excitation line 21b
A large electromotive force is generated in the pickup coil 35 of the ground moving body 30 that is tuned to the frequency of 1. The AC current generated by the electromotive force is rectified by the rectifier circuit 402, and the inverter 404 performs PWM control to a predetermined voltage, for example, 100V.
It is converted into a single-phase alternating current and supplied to a load 405, such as an electric motor with a reducer (not shown). Wheels are driven by a motor (not shown) that is supplied with electric power, and rolls on the traveling rail 11.

In the above description, the distance Y between the pickups 33 is set larger than the distance X between the excitation line units 21 and 22, so that the pickups other than the pickups located within the distance X can be supplied with power. Even if a momentary power failure occurs, or if one of the plurality of pickups does not operate, the ground vehicle 30 can travel stably.

Further, the position sensor does not stop or start the ground moving body 30 in the joint section X of the exciting line 20, and limits the load other than traveling so as not to apply a load. Therefore, the load on the ground vehicle 30 during traveling at a constant speed is small, and the ground vehicle travels stably even if an instantaneous power failure occurs or one of the plurality of pickup coils 35 does not operate. be able to.

Next, an embodiment of a second invention apparatus according to the invention of claim 2 will be described. FIG. 5 is an external perspective view showing an essential part of the second invention device. The same parts as those of the first invention device are denoted by the same reference numerals.

In the second invention device, in contrast to the first invention device, "the interval between the pickups is larger than the interval between the adjacent excitation line units", the ground mobile unit 30 has a power failure of the pickup 33. Battery 3 for occasional operation
6 and a voltage detection switching circuit 403 for detecting the power failure of the pickup and connecting the battery 36 to the load 405.

The voltage switching circuit 403 may be any one that operates to connect the battery 36 to the load 405 by detecting that the electromotive force induced in the pickup coil 35 is zero or less than a set value.

Since the operation of the second invention device is similar to the above, the description thereof will be omitted. According to the device of the present invention, even if one of the plurality of pickups fails, the ground moving body can always run stably, so that the reliability is improved.

Next, one embodiment of the third invention device according to the invention of claim 3 will be described. In the third invention device, in contrast to the first invention device, "the interval between the plurality of pickups is larger than the interval between the adjacent excitation wire ring units", in contrast to the ends of the excitation line units 21 and 22. The portion is characterized by having bent portions 21C and 22C (see FIG. 1) which are bent in the opening direction of the pickup 33 and through which the pickup can pass.

According to the device of the present invention, it is possible to pass between a plurality of excitation line units without any obstacle.

In the first to third invention devices, the pickup 33 is an iron core 34 having an E-shaped side view, and the excitation wires 21d are provided in both window portions sandwiching the central leg portion of the iron core 34. However, the present invention is not limited to this.

An embodiment in which the excitation line unit 20 and the iron core 34 of the pickup 33 have different shapes will be described below with reference to FIGS. 6 to 13.

6 and 7, the iron core 34 is C-shaped, and the coil 35 is wound near the tip of the iron core 34.
One exciting wire 21d is located substantially in the center of the window of the iron core 34, and the other exciting wire 21d is separated from the iron core 34. According to this embodiment, there is an advantage that the iron core 34 can be downsized.

In FIGS. 8 and 9, the iron core 34 is C-shaped, and one exciting wire 21d is a double winding in which the upper and lower layers are inserted substantially in the center of the window of the iron core 34. Excitation line is iron core 34
It is further separated. According to this embodiment,
For the same inductance, the line length per excitation line unit is ¼ that in the case of single winding, but the power supply device 50
The power supply capacity of can be halved.

FIGS. 10 and 11 show the case where the excitation line 20 is composed of a straight path, in which one excitation line 21d is located substantially in the center of the window of the C-shaped iron core 34, and the other is provided. The excitation line is arranged so as to deviate from the moving direction of the iron core 34.
According to this structure, the iron core 34 can be downsized.

12 and 13 show the case where the exciting circuit forms a peripheral circuit by a combination of a curved path and a straight path. In the illustrated example, an E-shaped iron core is used. According to this configuration, even when the traveling path is a straight road or a combination of curved lines, the layout can be easily changed by combining the guide line units or adding the guide line units. Moreover, since the arrangement of the power source 50 can be summarized for each block, the wiring work cost can be reduced.

Needless to say, the above-mentioned embodiments are not limited to the examples, and various combinations can be carried out.

[0047]

As described above, according to the first aspect of the present invention.
According to the invention described above, even if the traveling distance of the ground moving body is a long distance of 100 m or more, the required electric power is stably supplied to the ground moving body, and only the excitation line unit is added when the traveling path is expanded. Can be dealt with.

Therefore, when the present invention is applied to a track guided vehicle that travels in a clean room, it is possible to easily and quickly respond to layout changes and expansions. There are advantages such as easy maintenance.

According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, even if one of the plurality of pickups fails, the ground moving body can always run stably. The reliability of the carrier is improved, and the movability of the transfer device is improved.

In addition to the invention described in claim 1 or 2, the invention described in claim 3 has a plurality of cores even when the core is positioned between two exciting wires such as an E-shaped core. Since it is possible to pass between the excitation line units without obstacles, it is very convenient when changing the layout or adding more.

[Brief description of drawings]

1 to 5 are drawings according to the invention described in claim 1, and FIG. 1 is an external perspective view showing a main part of a device of the present invention.

FIG. 2 is a plan view illustrating a main part of the apparatus.

FIG. 3 is a front view illustrating a main part of the apparatus.

FIG. 4 is a side view taken along line AA of FIG.

FIG. 5 is an electric circuit diagram of a contactless power feeding device for a ground vehicle.

6 to 13 are excitation line units,
FIG. 6 is a drawing for explaining another embodiment of the iron core for pickup, and FIG. 6 is a front view of a single-winding excitation line.

FIG. 7 is a sectional view taken along line BB of FIG.

FIG. 8 is a front view of a double-winding excitation wire.

9 is a sectional view taken along the line CC of FIG.

FIG. 10 is an exemplary plan view of an excitation line composed of a straight path.

FIG. 11 is a sectional view taken along the line DD in FIG.

FIG. 12 is an exemplary plan view of an excitation line circuit including a curved path and a straight path.

13 is a cross-sectional view taken along the line EE of FIG.

[Explanation of symbols]

 10 Fixed Side 11 Traveling Rail 12 Hanger 13 Holding Tool 20 Excitation Line 21, 22 Excitation Line Unit 21b Excitation Line 21C Bending Part 30 Ground Moving Object 33 Pickup 34 Iron Core 35 Pickup Coil 36 Battery 40 Power Supply Unit 50 Power Supply Unit X Excitation Line Unit Interval Y Interval of iron core for pickup

Claims (3)

[Claims] 1. A magnetic field is supplied to a moving body by electromagnetic induction with an excitation line, which is arranged along a traveling path on which the ground moving body travels, for flowing a high-frequency current as a primary side and a pickup provided on the ground moving body as a secondary side. In the non-contact power feeding apparatus for a ground moving body, the exciting line has an exciting line of a predetermined length, and a base end portion of the exciting line is connected to a high frequency power source to form a set of exciting line units. An excitation line for the entire traveling section is formed by arranging the set in the traveling direction of the ground vehicle at a predetermined interval, and a plurality of the pickups are provided so as to face the excitation line, and the pickups are spaced apart from each other. A contactless power feeding device for a ground moving body, which is larger than a space between adjacent excitation line units. 2. A power supply is provided to the mobile body by electromagnetic induction with an excitation line, which is arranged along a traveling path on which the ground mobile body travels, for flowing a high-frequency current as a primary side and a pickup provided on the ground mobile body as a secondary side. In the non-contact power feeding apparatus for a ground moving body, the exciting line has an exciting line of a predetermined length, and a base end portion of the exciting line is connected to a high frequency power source to form a set of exciting line units. An excitation line for the entire traveling section is formed by arranging the set at a predetermined interval in the traveling direction of the ground moving body, and the ground moving body includes a plurality of pickups provided so as to face the excitation line. A non-contact power feeding apparatus for a ground moving body, comprising: a battery for operating when the pickup has a power failure. 3. A magnetic field is supplied to the moving body by electromagnetic induction with an excitation line, which is arranged along a traveling path of the ground moving body and which supplies a high frequency current, as a primary side and a pickup provided on the ground moving body as a secondary side. In the non-contact power feeding apparatus for a ground moving body, the exciting line has an exciting line of a predetermined length, and a base end portion of the exciting line is connected to a high frequency power source to form one exciting line unit. Are arranged at predetermined intervals in the traveling direction of the ground moving body to form an excitation line for the entire traveling section, and the end of the excitation line unit is bent in the opening direction of the pickup so that the pickup can pass therethrough. A non-contact power feeding apparatus for a ground moving body, which has a bent portion.