JP3303764B2 - Non-contact power supply - Google Patents

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 supply device for supplying electric power to an electric vehicle of an automatic warehouse or a ceiling moving system in a non-contact manner.

[0002]

2. Description of the Related Art Electric vehicles include transportation means such as monorails, electric vehicles, which have been actively researched and developed in recent years, and self-propelled vehicles for transporting parts and the like in factories, such as overhead traveling vehicles. Various types of moving objects such as vehicles and vehicles for automatic warehouses are known.

[0003] As one of means for supplying electric power to these electric vehicles, a charging station system has been conventionally known. In this method, every time the power stored in the battery mounted on the moving body is consumed, the charging station stops at the charging station to perform charging. However, this method has a problem that if the power of the battery is lost even during the work, it is necessary to stop by the charging station, and the work efficiency is reduced.

[0004] It has been proposed to employ a contact-type power supply system such as that found on a monorail in a self-propelled vehicle. However, since the contact portion is worn out, the need for maintenance and the generation of dust and the like cause a problem. For example, it cannot be used in a clean room or the like. Further, in the contact-type power supply method, there is a problem that spark cannot be used in an explosion-proof area because a spark is generated at a contact portion.

Therefore, in order to solve the above problems, a non-contact power supply system has been proposed. However, in the non-contact power supply method as described above, inductance occurs between power supply lines, and power loss is large. Therefore, conventionally, FIG.
As shown in (c), a non-contact power supply device in which a capacitor (capacity) is inserted into a power supply line has been proposed. That is, FIG. 1A shows an example in which a capacitor (capacity) 3 is inserted into the feed line 2 near the high-frequency power source 1, and FIG. FIG. 3C shows an example in which a capacitor (capacitance) is provided in the middle of the feeder line 2.
This is an example in which 5 is inserted. In either case, the occurrence of inductance is prevented. Particularly, in FIGS. 3B and 3C, the effect is great because the capacitor (capacitance) 4 (or 5) is inserted into the loop-shaped power supply line 2.

FIGS. 5A and 5B are views for explaining a specific mounting structure in the case of FIG. 4C described above. That is, FIG. 5C is an enlarged view of a portion A shown in FIG.
(A) is a side view thereof, and (b) is a plan view thereof. In FIGS. 5A and 5B, reference numeral 6 denotes a rail;
Reference numeral 7 denotes a support member that supports the two power supply lines 2a and 2b on the rail 6. The above-mentioned capacitor (capacitance) 5 is provided on the back side of the rail 6. Reference numeral 8 denotes a connector.

[0007]

In the conventional non-contact power supply device, a capacitor (capacitance) must be provided in the power supply line 2 as described above, and the arrangement is complicated. For example, in the case of the above example, the feed line 2 is connected to the rail 6.
, And the power supply lines 2 a and 2 b must be extended to the back surface of the rail 6 and connected to the capacitor (capacitance) 5. This is the same in the case of FIG. 4B.

Therefore, the conventional non-contact power supply device is used for disposing the capacitor (capacitance) 4 or 5 up to the back surface of the rail 6 and requires a large space, and the wiring of the power supply lines 2a and 2b is also arranged. It becomes complicated. This is a problem because the longer the power supply lines 2a and 2b, the greater the number of capacitors (capacities) provided.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and provides a non-contact power supply device which does not require a work of laying out a power supply line and can easily install a power supply device having a long line. .

[0010]

According to the first aspect of the present invention, a power supply line is provided along a rail, and a high-frequency current flows through the power supply line to supply power to a moving body. In the non-contact power supply device, a capacitor is formed in a support member for attaching the power supply line along the rail, and both ends of the capacitor are provided by providing the non-contact power supply device connected to the power supply line. it can.

Here, the non-contact power supply device supplies electric power to a moving body such as an automatic warehouse or a ceiling type self-propelled vehicle in a non-contact manner. The moving body rectifies the electric power supplied from the power supply line and uses the rectified electric power for driving a motor. Further, the capacitor (capacity) in the support member is composed of, for example, a paper capacitor or an oil capacitor, and a feeder line is connected to both ends of the capacitor (capacity).

With this configuration, a current flows through a line in which a power supply line and a capacitor (capacitance) are connected in series, so that generation of inductance can be prevented and power loss can be prevented. At the same time, since the capacitor (capacity) is disposed in the support member, the non-contact power supply device can be constructed simply by attaching the support member to the rail and further arranging the power supply line to the support member. Easy.

According to a second aspect of the present invention, in the first aspect of the invention, the support member and the power supply line are, for example, unitized. As described above, by constructing the support member and the power supply line into a unit, the construction of the non-contact power supply device only requires assembling these units sequentially, and the non-contact power supply device can be more easily installed.

[0014]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is an overall configuration diagram of a contactless power supply system including the contactless power supply device of the present embodiment. The non-contact power supply 9 includes a high-frequency power supply 10 and a power supply line 1.
1a and 11b, and a support member 12 for supporting the power supply lines 11a and 11b on a rail (not shown).
The power supply lines 11a and 11b are formed of litz wires to prevent occurrence of inductance.

On the other hand, the moving body 13, which is an electric vehicle, has an E-shaped core 14, and receives power supply from power supply lines 11a and 11b via coils provided on the E-shaped core 14. FIG. 3 shows the above-mentioned E-shaped core 14 and the power supply lines 11a and 11a.
It is sectional drawing which shows arrangement | positioning relationship of b. In FIG.
Is a rail, and the above-described power supply lines 11a, 11b are provided at the tip of the support member 12, and the power supply lines 11a, 11b
Are located in the concave portions of the E-shaped core 14. In addition, E-shaped core 14
Is wound with a coil 19, and an electromotive force is induced in the coil 19 by a high-frequency current supplied to the power supply lines 11a and 11b.

As described above, the E-shaped core 14 (the coil 1
The power obtained in 9) is converted into DC by a rectifier circuit 15 and converted into AC power of a desired frequency by an inverter (chopper circuit) 16 and then transmitted to a motor 17 for moving the moving body 13 or for loading and unloading. Supplied.

In such a configuration, FIG.
(B) shows the arrangement of the power supply lines 11a and 11b. still,
FIG. 3C shows a conventional feeder line 2a, 2b for comparison with this example.
FIG. 1A and 1B, the support member 12 is fixed to a rail 21. The support member 12 is provided with power supply line grips 12a, 12 extending in a direction perpendicular to a rail supporting the power supply lines 11a, 11b.
b, and a capacitor (capacitance) is formed inside. The power supply lines 11a and 11b are formed of litz wire and have a predetermined length. This length is a length corresponding to the spacing between the support members 12 described above.

The power supply lines 11a and 11b are connected to corresponding power supply line grips 12a and 12b, respectively. For example, both ends of the upper feeder line 11a are connected to the feeder line gripper 12a, and the connection portions 18a and 18b are connected to electrodes of capacitors (capacitances) formed in the feeder line holder 12a. The lower end of the feeder line 11b is connected to the feeder line gripper 12b at both ends, and the connecting portions 20a,
Reference numeral 0b is connected to an electrode of a capacitor (capacitance) formed on the power supply line holding portion 12b. The above connection is made with screw 1.
8a ', 18b', 20a 'and 20b'.

The capacitors (capacitances) formed in the power supply line gripping portions 12a and 12b may be configured such that both electrodes are formed by electrodes with a dielectric material interposed therebetween, or both electrodes may be formed by electrodes using oil as an insulator. It is formed of various forms of capacitors, such as the above-described forms.

With the above configuration, when a current of, for example, 10 KHz is supplied from the high-frequency power supply 10 shown in FIG. 2 to the power supply lines 11a and 11b, the supplied current is generated by the power supply lines 11a and 11b and the capacitor (capacitance). It flows through a non-contact power supply line connected in series. In particular, in this example, a capacitor (capacity) is provided in the support member 12 provided at a predetermined interval.
Is provided, a high-frequency current flows through a power supply line in which a large number of capacitors (capacitances) are provided.
For this reason, the conventionally generated inductance is absorbed by the capacitor (capacitance), and the occurrence of inductance that causes power loss is prevented.

Further, in the present embodiment, the above-mentioned capacitor (capacity) is installed in the feeder line holding portions 12a and 12b, and a capacitor (capacitance) is disposed on the back surface of the line as in the related art, or the feeder line is connected. There is no need to run long. Therefore, the power supply lines 11a and 11b can be arranged very easily, and a non-contact power supply device can be easily provided.

In the above example, the power supply line 1 is connected to the support member 12.
1a and 11b are attached, but if the support member 12 and the power supply lines 11a and 11b are unitized, the unit is first created, and then the support member 12 is fixed to the rail 21. , 11b on the rail 21 is an easier task.

Further, the capacitance of the capacitor is changed to the power supply line 11a,
You may comprise so that it can be selected according to the length of 11b. In this case, a plurality of types of support members 12 having different capacitance values are prepared.

[0024]

As described above, according to the present invention, since the capacitor (capacity) is provided in the support member to which the power supply line is attached, it is necessary to specially provide the capacitor (capacity) on the back surface of the rail or the like. Absent. Therefore, the installation of the power supply line is simplified, and the long-line non-contact power supply device can be easily installed.

Also, if the power supply line itself is unitized, the installation of the non-contact power supply device becomes easy from this point as well.

[Brief description of the drawings]

1A is a diagram showing a configuration of a power supply line, FIG. 1B is a side view thereof, and FIG. 1C is a diagram showing a configuration of a conventional power supply line for comparison with the present example. is there.

FIG. 2 is an overall configuration diagram of a non-contact power supply system including the non-contact power supply device of the embodiment.

FIG. 3 is a diagram showing an arrangement relationship between an E-shaped core and a feeder line.

FIGS. 4A to 4C are general views of a non-contact power supply device in which a capacitor (capacitance) is inserted in a power supply line.

FIG. 5 is a diagram illustrating a specific mounting configuration of a conventional capacitor (capacitance).

[Explanation of symbols]

 Reference Signs List 9 non-contact power supply device 10 high-frequency power supply 11a, 11b power supply line 12 support member 12a, 12b power supply line grip part 21 rail 13 moving body 14 E-shaped core 15 rectifier circuit 16 inverter (chopper circuit) 17 motor

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-7-227003 (JP, A) JP-A-57-30211 (JP, A) JP-A-3-7628 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) B60L 5/00 B60M 7/00

Claims (2)

(57) [Claims] 1. A non-contact power supply device for arranging a power supply line along a rail, supplying a high-frequency current to the power supply line and supplying power to a moving body, wherein the power supply line is attached along the rail. A non-contact power supply device, wherein a capacitor is formed in a support member, and both ends of the capacitor are connected to the power supply line. 2. The non-contact power supply device according to claim 1, wherein the support member and the power supply line are unitized.