JP3383880B2 - 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 power supply line to which high-frequency AC power is applied and magnetically coupled to the power supply line.
The present invention relates to a non-contact power feeding device including a pickup unit that receives power from the power feeding line in a non-contact manner.

[0002]

2. Description of the Related Art FIG. 6 is a schematic side sectional view of a conventional non-contact power feeding device disclosed in Japanese Patent Laid-Open No. 8-126107, in which 1 is a fixed base, 2 is a feeding line, and 5 is a moving body. , 7
Indicates a pickup unit. Fixed base 1 is moving body 5
Is fixed along a path along which the supporting members 1a and 1b of the same length are horizontally and horizontally projected from one side surface thereof at predetermined intervals in the upper and lower directions. Is provided at the tip of each support 1a, 1b.
Is supported.

On the other hand, a pickup portion 7 is fixed to the moving body 5 on the side surface facing the fixed base 1. The pickup section 7 is composed of a pickup core which is made of a magnetic material such as ferrite and which is E-shaped in a side view, and coils 7f and 7g which are wound around the pickup core. The pickup core is fixed on the fixed base 1 with a substantially equal interval in the upper and lower directions.
The plate-shaped parts 7a, 7b, 7c forming upper, middle and lower rectangles and the upper, middle and lower plate-shaped parts 7 protruding in parallel toward the side.
a, 7b, 7c, connecting portions 7d, 7e connecting the one side ends, and having an E-shape in a side view as a whole, coils 7f, 7g are wound in the same direction on each connecting portion 7d, 7e. ing.

The coils 7f and 7g are connected to the controller 9 in series or in parallel, respectively. Further, the control device 9 is connected to the load device 10.

FIG. 7 is a schematic plan view showing a moving path of a moving body showing another conventional non-contact power feeding device (Japanese Patent Laid-Open No. 9-298801), and FIG. 8 is an enlarged cross section taken along line VIII-VIII of FIG. It is a figure. As shown in FIG. 7, two main circuits A and B are provided by a power supply line 30 through which a high-frequency alternating current is supplied, and a transfer auxiliary circuit C between the two main circuits A and B is provided by a power supply line 31.
And the main circuits A and B are arranged along the inside of the movement path of the moving body 35 (which is set in the shape of "8" in the illustrated example), and the auxiliary circuit C is provided.
Are arranged along the outside of the movement path at the connecting portion between the main circuits A and B.

As shown in FIG. 8, above the moving body 35,
A ferromagnetic yoke 37, which is formed in an E shape in which a coil 36 is wound in the vertical direction, is provided in one of the recesses (left side in FIG. 8) sandwiching the coil 36, and the feeder line 3 of the main circuit A or B.
0a, and the other concave portion (right side in FIG. 8) is provided so as to face the power supply line 31a of the auxiliary circuit C.

Here, the high frequency current flowing through the power supply line 30a on the main circuits A and B side and the high frequency current flowing through the power supply line 31a on the auxiliary circuit C side are set to have mutually opposite phases, and the yoke is provided. Power supply lines 30a for main circuits A and B on both sides of
The electromotive force of the coil 21 should not be canceled even if the power supply line 31a of the auxiliary circuit C and the feed line 31a of the auxiliary circuit C face each other at the same time.

As a result, when the moving body 35 transfers from one main circuit A to the other main circuit B, one main circuit A
Even if the power supply received from is interrupted, it is possible to transfer to the other main circuit B while continuing the power supply state by receiving power supply from the auxiliary circuit C.

[0009]

In the conventional apparatus shown in FIG. 6, when the coils 7f and 7g move in the arrow F direction due to the displacement of the moving body 5, the degree of magnetic coupling between the feeder line and the coil and the fixation thereof are fixed. Since the loss due to the board 1 changes, the output voltage may change, and the operation of the load device may stop or become unstable, and there is a problem that the voltage stabilizing circuit is indispensable.

Further, in the conventional device shown in FIGS. 7 and 8, since the power supply lines 30a and 31a of the separate circuits correspond to both the concave portions, the coil at the time of transfer when the current of each circuit is constant. Since the interlinkage magnetic flux changes, a complicated voltage stabilizing circuit is required on the side of the moving body 35, and a complicated control circuit is required to control the current of each circuit, so that the moving body operates accurately. It was difficult to give. In addition, when the transfer is not normally performed, the power supply line 30a or 31a is present only in one of the yokes 37, which causes a problem of poor power supply efficiency.

The present invention has been made in view of the above circumstances, and an object of the present invention is to move the forward feed line and the backward feed line by setting the recesses for introducing the feed lines in mutually opposite directions. Changes in the amount of power supply due to magnetic coupling with the forward power feed line and magnetic coupling with the return power feed line are offset against relative displacement with the body, the power supply voltage and power reception voltage are stable, and a complicated voltage stabilization circuit is not required. Another object is to provide a contactless power supply device.

[0012]

According to a first aspect of the present invention, there is provided a non-contact power feeding device, a forward power feeding line and a backward power feeding line, in which high-frequency alternating current flows, arranged in parallel along a moving path of a moving body, and a moving body. And a pickup unit magnetically coupled in a non-contact state with the forward power feed line and the return power feed line, the pickup unit comprising :
Pick-up cores, which are located on both outer sides of the juxtaposed forward feed line and the return feed line, respectively enclose the forward feed line and the return feed line, respectively, and face the forward feed line and the return feed line in the pickup core, respectively. It is characterized in that it comprises a coil wound around a portion to be turned.

The contactless power feeding device of the invention according to claim 2 is
A forward feed line and a return feed line in which a high-frequency alternating current flows, which are arranged in parallel along the moving path of the moving body, and mounted on the moving body, and magnetically coupled to the forward feed line and the return feed line in a non-contact state. In a non-contact power feeding device including a pickup unit, the forward power feeding line and the backward power feeding line are opened at the sides.
The upper and lower walls of the released U-shaped fixed base face downward,
The pickup part is supported by a support projecting upward, and the pickup portion has an H-shaped cross section in which the forward power feed line and the return power feed line are located inside two recesses. And a coil wound around four arm portions of the pickup core, which face the forward feed line and the return feed line, respectively.

According to the first and second aspects of the present invention, since the concave portions surrounding the outward feed line and the return feed line are arranged so as to face opposite to each other, the positional displacement between the coil and the outward feed line and the return feed line is displaced. The changes in the power supply amount due to the above are mutually offset, the power supply amount is stable even when the moving body shakes, and a special voltage stabilizing circuit is not required.

[0015]

[0016]

[0017]

(Embodiment 1) FIG. 1 is a schematic vertical sectional view showing the structure of Embodiment 1 according to the present invention.
In the figure, 1 is a fixed base made of metal or non-metal that also functions as a rail, and 5 is a moving body. The fixed base 1 is configured as an elongated object having a downward U-shaped cross section with an open lower surface,
It is installed along the moving route of the moving body 5. Inside the opposite side walls of the fixed base 1, support members 2a, 2b are provided at upper and lower intermediate positions along the longitudinal direction of the fixed base 1 at predetermined intervals so as to face each other by a predetermined size. The forward feed wire 3a and the return feed wire 3b are detachably supported substantially parallel to each other along the longitudinal direction of the fixed base 1 across the tip portion thereof.

On the other hand, the moving body 5 is movably mounted on the fixed base 1 having the function as the rail, and its driving power is transferred to the fixed base 1 through the pickup section 6 provided on the upper surface of the moving body 5. Power is received from the laid outward power feeding line 3a and the returning power feeding line 3b. The pickup unit 6 includes a pickup core made of a magnetic material and a coil 6d. The pickup core has a flat plate-shaped core upper portion 6a, a same-shaped core lower portion 6b, and core upper and lower portions 6a.
It is formed in a V-shaped cross section with a core strut portion 6c extending across the widthwise central portions of a and 6b, and a coil 6d is wound around the core strut portion 6c. As a result, the outward power supply line 3
a, the recesses surrounding the return power feed line 3b are oriented in opposite directions.

The width dimension D of the upper and lower portions 6a, 6b of the core is larger than the distance L between the outward feed line 3a and the return feed line 3b,
Further, the thickness M of the core column portion 6c is set so as to have a relationship (D>L> M) smaller than the interval L between the outward feed line 3a and the return feed line 3b. FIG. 2 is an explanatory view showing the work for positioning the pickup unit 6 between the outward feed line 3a and the return feed line 3b in the first embodiment.
Of two adjacent support members 2a, 2b in the longitudinal direction of the
The outward feed line 3a and the return feed line 3b are removed from each of them, and the width L between them is widened.
Is located between the side walls of the fixed base 1 through the forward feed line 3a and the return feed line 3b, the core upper portion 6a of the pickup unit 6 is located above the forward feed line 3a and the return feed line 3b, and the core lower portion 6b. Is located below the outward feed line 3a and the return feed line 3b. After that, the outward feed line 3a and the return feed line 3b may be attached to each of the support members 2a and 2b.

In the first embodiment, the structure of the pickup unit 6 is simpler than that of the conventional device shown in FIG. 6, and the moving body 5 is moved in the left and right directions with respect to the fixed base 1. In case of displacement, the outward feed line 3a and the return feed line 3b
Since the dimensions of the coil 6d and the coil 6d have a relationship in which one is moved closer to the other, the change in the supplied power due to this is offset, the supplied power is stabilized, and the voltage stabilizing circuit is not required.

(Second Embodiment) FIG. 3 is a schematic vertical sectional view showing the structure of the second embodiment. In the figure, 1 indicates a fixed base also having a function as a rail, and 5 indicates a moving body. . The fixed base 1 is configured as a long product made of a silicon steel plate and having an inverted T-shaped cross section. Supports 2a and 2b are provided on opposite sides of the intermediate portion at predetermined intervals in the longitudinal direction of the column 1c. The width is projected, and the forward power supply line 3 is attached to each tip.
a and the return feed line 3b are detachably supported so as to be parallel to each other.

On the other hand, the moving body 5 is movably mounted on the fixed base 1 and has a pickup portion 8 for receiving electric power which is a power source. The pickup unit 8 includes a pair of pickup cores 8a, 8b made of a magnetic material and having a U-shaped cross section.
And a coil 8 wound around a connecting portion that connects the respective arm portions to each other.
e, 8f. The pickup cores 8a and 8b are separated from each other by the pillar portion 1c of the fixed base 1, and the support 2
The forward and backward feed lines 3a and 3b, which are detachably supported via a and 2b, are arranged facing each other in such a manner as to be enclosed in a U-shaped recess and face the forward feed line 3a and the backward feed line 3b. The coils 8e and 8f are located at the position. The work of positioning the pickup units 8, 8 on the outside of the outward feed line 3a and the return feed line 3b is substantially the same as that shown in FIG.
This is done by narrowing the distance L from b.

In the second embodiment, the pickup unit 8, the outward feed line 3a, and the return feed line 3b are separated from the support column 1c of the fixed base 1 so as to be axisymmetric on both sides of the support column 1c. Since the electric wires 3a and 3b are located, the increase and decrease due to the change in the magnetic coupling due to the displacement of the moving body 5 in the left and right directions are offset to each other, so that the power supply voltage is stabilized and a voltage stabilizing circuit is required. Therefore, the equipment cost will be low.

(Third Embodiment) FIG. 4 is a schematic vertical sectional view showing the structure of the third embodiment, in which 1 is a fixed base and 5 is a base.
Indicates a moving body. The structure of the fixed base 1 is substantially the same as that of the first embodiment except that the width dimension in the left and right directions is wide.

On the other hand, the movable body 5 is provided with pickup portions 8 and 8 on both sides thereof, and each pickup portion 8 is wound around a connecting portion connecting the U-shaped pickup cores 8a and 8b and the respective arm portions. Coil 8e, 8f. Each of the pickup cores 8a and 8b faces the opening side of the concave portion to the outside, in other words, to the side facing the left and right side walls of the fixed base 1, and the forward feeding wire 3a and the backward feeding wire 3b are located in the concave portion. The coils 8e and 8f are arranged so as to face the power supply line 3a and the return power supply line 3b, respectively. The work of positioning the moving body 5 and the pickup units 8 and 8 between the outward feed line 3a and the return feed line 3b is performed in the same manner as shown in FIG.

In the third embodiment, in addition to the operation and effect of the first embodiment, the moving body 5 and the pick-up portions 8 provided on the moving body 5 are of the fixed base 1 having a downward U-shaped cross section. Since the mobile body 5 is housed inside, it has an advantage that the whole body is small in size when the moving body 5 is small, and the installation place is small accordingly.

(Fourth Embodiment) FIG. 5 is a schematic vertical sectional view showing the structure of the fourth embodiment. In FIG. 5, reference numeral 1 denotes a fixed base having a function as a rail, and 5 denotes a moving body. . The fixed base 1 is formed in a lateral U-shaped cross-section with an open side, and the support members 2a and 2b are spaced from the upper and lower walls downward or upward at predetermined intervals in the longitudinal direction of the fixed base 1. Each of them is projected by a predetermined length, and the forward power feed line 3a and the backward power feed line 3b are detachably supported at the respective tips. The outward feed line 3a and the return feed line 3b can be removed from the supports 2a and 2b, respectively, so that the distance between them can be increased as shown in FIG.

On the other hand, the moving body 5 is provided with a pickup section 8 in a manner that it extends between both sides of the forward feed line 3a and the return feed line 3b. Each pickup portion 8 is made of a magnetic material, and each arm portion of the pickup core having an H-shaped cross section formed of both arm portions and a connecting portion connecting the intermediate portions to each other faces the forward power feeding line 3a and the backward power feeding line 3b. Coil 8e in 4 places, 2 places near the top and bottom
~ 8h is wound. Of course, instead of winding the coils around the left and right arms, the coils may be wound around these connecting portions.

In the fourth embodiment as described above, the two recesses in the pickup section 8 are located in directions opposite to each other, and the power supply line is located inside each of the recesses. The same action and effect as the action and effect of can be obtained.

[0030]

According to the first and second aspects of the present invention, the power feeding line is positioned inside the concave portions enclosing the outward power feeding line and the backward power feeding line in directions opposite to each other so as to face the coil. Therefore, the change in the power supply amount due to the displacement of the coil and the outward power supply line and the return power supply line and the loss in the fixed substrate 1 cancel each other out, and the power supply amount is stable even when the moving body shakes. , Does not need a special voltage stabilization circuit.

[0031]

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing a configuration of a first embodiment according to the present invention.

FIG. 2 is an explanatory diagram showing work for positioning the pickup unit between the power supply lines in the first embodiment.

FIG. 3 is a schematic vertical sectional view showing the configuration of the second embodiment.

FIG. 4 is a schematic vertical sectional view showing the configuration of the third embodiment.

FIG. 5 is a schematic vertical sectional view showing the configuration of the fourth embodiment.

FIG. 6 is a schematic side sectional view of a conventional non-contact power feeding device.

FIG. 7 is a schematic plan view showing a moving path of a moving body showing another conventional non-contact power feeding device.

8 is an enlarged cross-sectional view taken along the line VIII-VIII in FIG.

[Explanation of symbols]

1 fixed base 2a, 2b support 3a Outward power supply line 3b Return power line 5 moving body 6 Pickup part 6a core upper part 6b Lower core 6c Core support 6d coil 8 Pickup part 8a, 8b pickup core 8e, 8f coil

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields investigated (Int.Cl. ⁷ , DB name) B60L 5/00 B60M 7/00 H01F 38/14 H02J 17/00

Claims (2)

(57) [Claims] 1. A forward feed line and a return feed line in which a high-frequency alternating current flows, which are arranged in parallel along a moving path of a moving body,
A non-contact power feeding device which is mounted on a moving body and includes a pickup unit magnetically coupled to the forward power feeding line and the backward power feeding line in a non-contact state, wherein the pickup unit includes the juxtaposed forward power feeding line and the return route. A pickup core, which is located on both outsides of the power supply line and individually surrounds the forward power supply line and the return power supply line, and a coil wound around a portion of the pickup core that faces the forward power supply line and the return power supply line, respectively. A contactless power supply device comprising: 2. A forward feed line and a return feed line in which a high-frequency alternating current flows, which are arranged in parallel along a moving path of a moving body,
In a non-contact power feeding device which is mounted on a moving body and includes a pickup unit magnetically coupled to the forward power feeding line and the backward power feeding line in a non-contact state, in the forward power feeding line and the backward power feeding line, the sides are open. Was done
The upper and lower walls of the letter-shaped fixed base project downward and upward, respectively.
The pickup unit is supported by an installed support member, and the pickup unit has a cross-section H-shaped pickup core in which the forward feed line and the return feed line are respectively located inside two recesses , and the forward pass in the pickup core. A non-contact power supply device comprising a power supply line and a return power supply line, and a coil wound around four arm portions facing each other.