JP3522413B2 - Non-contact power supply device for ground moving 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 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 load 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 vehicle is configured so that it can be contactlessly supplied with power even while the vehicle is running (for example, Tokuhyo 6-506099) .
(See gazette, etc. )

[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.

The present invention was created in light of the above background.
Therefore, the purpose is to correct the above-mentioned drawbacks.
Providing a contactless power supply device for ground vehicles that can do better
To do.

[0008]

[0009]

[0010]

In the non-contact power feeding apparatus for a ground vehicle of the present invention, an exciting line, which is arranged along a traveling path along which the ground vehicle travels and which carries a high frequency current, is provided on the primary side, and is connected to the ground vehicle. In a non-contact power feeding device for a ground moving body, which feeds a moving body by electromagnetic induction with a plurality of pickups provided as secondary sides, in the exciting line, one end is closed and the exciting line is a loop-shaped exciting line as a whole. It is provided as a unit, and a plurality of sets of excitation line units are arranged at a predetermined interval over the entire traveling section of the ground vehicle, and one end of the excitation line unit can pass a pickup that enters between the excitation lines. Is provided with a bent portion bent downward, and the bent portions of the adjacent excitation line units are arranged so as to face each other.
Is smaller than the distance between adjacent pickups.
And each rectifier circuit is connected to the output stage of multiple pickups.
A common capacitor is connected via
The voltage across the sensor is output as the power supply voltage.
It is characterized in that there.

[0011]

Further, it is desirable that the excitation line has a structure which is connected to the pickup and has a battery which operates in the event of a power failure.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, non-contact of a ground moving body of the present invention will be described.
An embodiment of a tactile power supply device will be described with reference to the drawings . 1 is an external perspective view showing an essential part of the device , FIG. 2 is a plan view illustrating an essential part of the device, FIG. 3 is a front view of FIG. 2, and FIG.
FIG. 5 is a side view taken along line AA of FIG. 5, and FIG. 5 is an electric circuit diagram of a non-contact power feeding device for a ground moving body.

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 peripheral circuit composed of a curved path and a straight path, and FIG. 13 is E of FIG.
It is a -E line sectional view.

Non-contact power feeding device for ground vehicles listed here
Is a power supply device 5 provided on the fixed side 10 as shown in FIG.
It is composed of an excitation line 20 including 0 and a power supply unit 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 conveyed 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. is 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.

The operation of the apparatus configured as above will be described. The 200V three-phase AC output from the AC power supply is converted into a high-frequency sine wave of, for example, 10 KHz by the power supply device 50 and supplied to each excitation line unit 21, 22, ... Direction, the magnetic flux is concentrated on the central leg of the iron core, 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 excitation 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. Further, the ends of the excitation line units 21 and 22 are picked up.
Bending in the opening direction of the pickup 33 and passing the pickup
Has possible bends 21C, 22C (see FIG. 1)
It Therefore, there is no obstacle between multiple excitation line units.
Can pass

Next, a modified example of the device will be described with reference to the drawings . FIG. 5 is an external perspective view showing a main part of an apparatus according to a modification . The same parts as those of the device are designated by the same reference numerals.

In the case of this modified example, in contrast to "the interval between the pickups is larger than the interval between the adjacent excitation line units", the ground moving body 30 is provided with a battery 36 for operating during a power failure of the pickup 33, and a pickup. Is provided with a voltage detection switching circuit 403 for detecting the power failure 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.

According to this modified example, even if one of the plurality of pickups fails, the ground moving body can always run stably, resulting in high reliability.

[0038]

[0039]

In the above embodiment and its modification , the pickup 33 has an E-shaped iron core 34 in a side view.
Then, the excitation wire 21d is provided on both side windows sandwiching the central leg 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 , the non-contact power feeding of the ground moving body of the present invention
In the case of the device, even if the traveling distance of the ground moving body is 10
Even if it is a long distance of 0 m or more, it is possible to stably supply the necessary electric power to the ground moving body, and it is possible to deal with the addition of the excitation line unit even when adding the traveling path.

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. Therefore, in addition to shortening the construction period, maintaining cleanliness and supplying power There are advantages such as easy maintenance.

Further, like the E-shaped iron core and the like, two
Even if the iron core is located between the magnetic lines, multiple excitation lines
Since you can pass between units without obstacles,
It is very convenient for changing out or adding out
is there.

Further, in the case of a structure with a battery added,
If one of the multiple pickups fails,
Since the moving body can always run stably, the reliability of the device is improved.
And the movability of the carrier device is improved.

[Brief description of drawings]

FIG. 1 shows an implementation of a contactless power supply system for a ground vehicle of the present invention
FIG. 3 is a diagram for explaining the form, and is an external perspective view showing a main part of the device.

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 running rails 12 hangers 13 Holder 20 Excitation line 21, 22 Excitation line unit 21b Excitation line 21C bend 30 Ground Mobile 33 pickup 34 iron core 35 pickup coil 36 battery 40 power supply 50 power supply X Excitation line unit spacing Y core distance for pickup

─────────────────────────────────────────────────── --- Continuation of front page (56) References JP-A-56-141131 (JP, A) JP-A-5-328508 (JP, A) JP-A-6-54404 (JP, A) JP-A-8- 205309 (JP, A) Actual flat 2-97801 (JP, U) Actual flat 2-133102 (JP, U) Special table 6-506099 (JP, A) Special table 8-501436 (JP, A) International Publication 93/023909 (WO, A1) (58) Fields investigated (Int.Cl. ⁷ , DB name) B60L 5/00-5/42 H02J 17/00

Claims (2)

(57) [Claims] 1. A moving body is electromagnetically induced with a primary side being an excitation line arranged along a traveling path along which a ground moving body runs and flowing a high frequency current, and a plurality of pickups provided on the ground moving body being secondary sides. In the non-contact power feeding apparatus for a ground moving body that feeds power, the excitation line is provided with an excitation line looped as a whole with one end closed as an excitation line unit, and a plurality of sets of the excitation line units moves on the ground at predetermined intervals. It is placed over the whole running section of the body,
At one end of the excitation line unit, the bent portion is provided which is bent downward in order to allow passing through the pickup enter between the excitation lines, bent portions of the excitation line units adjacent disposed opposite the excitation line Units are next to each other
It is configured to be smaller than the interval between matching pickups.
Through the rectifier circuits in the output stage of multiple pickups.
Common capacitor is connected to the
A non-contact power feeding apparatus for a ground moving body, which is configured to output a voltage across both ends as a power feeding voltage . 2. The contactless power feeder for a ground moving body according to claim 1, wherein the excitation line is connected to a pickup.
A non-contact power feeding apparatus for a ground moving body, which is equipped with a battery that operates during a power failure .