JP4754441B2 - Non-contact power feeding device - Google Patents

Description

  The present invention relates to a non-contact power supply device, and more particularly to a non-contact power supply device that can stably supply power at a divided portion of a power supply line divided into a plurality of sections.

  The non-contact power feeding device is used for a transport device that suppresses dust generation to a minimum in a clean room of a semiconductor factory or a liquid crystal factory, for example.

In such a transport apparatus, the capacity of a power source for driving transport equipment such as a tracked transport vehicle and a stacker crane is increasing with an increase in size of a transported object and an increase in transport speed.
When power is supplied to these facilities by non-contact power supply, there is no problem as long as one high frequency power supply device can supply power to all necessary sections.
However, when the capacity of the high-frequency power supply is insufficient, it is necessary to divide the feeder line (feed line) into a plurality of sections and supply power to the load.

Thus, when dividing the feeder line, the two feeder line support members adjacent to each other in the divided portion are arranged with a gap between them, and the feeder line of each line is lowered, and the feeder line is folded, or It is connected to a high frequency power supply.
In this method, in the transient power supply in the divided portions, the ratio of the power supplied from each section is determined by the ratio of the lengths of the portions facing the power receiving coils in the two sections.

If there is a split part at the center of the receiving coil, the same power is received from the two sections, but the power induced in the coil is the sum of the vectors of magnetic flux induced from the two feeders, and the phase is inverted. If you do, the minimum value will be zero.
If only passing through this section transiently, no major problem will occur, but if the transport vehicle stops at this location, it will be difficult to restart due to power shortage.

  The present invention provides a non-contact power supply apparatus that can stably supply power at a divided portion of a power supply line divided into a plurality of sections in view of the problems of the conventional non-contact power supply apparatus. With the goal.

In order to achieve the above object, a non-contact power feeding device of the present invention forms a secondary power receiving coil by winding a coil around a core, and contacts the power receiving coil by electromagnetic induction from a power feeding line. In a non-contact power feeding apparatus configured to supply electric power, two independent coils are wound around a core of a power receiving coil, and each coil is connected to a resonance circuit and a rectifier circuit provided independently, and each rectifier circuit is connected to the coil. Three feeder support members are arranged adjacent to each other in the direction of laying the feeder lines at the dividing position of the feeder lines that are joined together at the output portion and divided into a plurality of feeder sections, and are arranged in parallel on both sides. One of the feeder lines to be divided is divided between the first and second feeder line supporting members arranged adjacent to each other, and the feeder line is below the second feeder line supporting member. And connect the other feeder to the adjacent And the second and partitioned between third feed line support was, the feed line leading to the lower portion of the second feed line support material, division of the arrangement to the feed line in parallel on both sides were to so that shifted only in the longitudinal length of the second feed line support, and, second th to form longer than the length of the power receiving coil laying length of the feed line of the feed line support characterized in that the.

According to the non-contact power feeding device of the present invention, when the power feeding section is divided into a plurality of parts, even when one coil crosses the divided part of the power feeding line, the other coil faces the power feeding line on the other side. Accordingly, half of the maximum power can be received even in the worst case.

  Hereinafter, embodiments of the non-contact power feeding device of the present invention will be described with reference to the drawings.

1 to 2 show an embodiment of the non-contact power feeding device of the present invention.
In this non-contact power feeding device, a coil 3 and 4 are wound around a core 2 to form a secondary power receiving coil 1, and power is supplied to the power receiving coil 1 from a power feeding line 5 by electromagnetic induction without contact. I am trying to supply.
In this non-contact power feeding device, two independent coils 3 and 4 are wound around the E-type core 2 of the power receiving coil 1, and a resonance circuit and a rectifier circuit (not shown) are provided. Are connected to each other, and the rectifier circuits are joined together at their output portions and combined, and as shown in FIG. 2, the dividing positions of the feeder lines divided into a plurality of feeder sections are connected by parallel feeder lines. It is shifted back and forth.

As shown in FIG. 1, the power receiving coil 1 has a coil 3 and a coil 4 wound around an upper connecting portion that connects three legs of an E-type ferrite core.
The feeder 5 is held by a feeder support 6.
Coil 3 and coil 4 are independent windings, and are connected independently to a set of secondary circuit resonance capacitors and a rectifier circuit (not shown), combined at the DC portion of the output of the rectifier circuit, and combined. Yes.

FIG. 2 shows a divided part of the feeder line.
Feed line support members 6a, 6b, and 6c are arranged, and among the parallel feed lines, the feed lines 7a and 8a on the left side of the figure are divided between the feed line support members 6b and 6c, and the feed lines are supported by the feed lines. Lead to the bottom of the material.
On the other hand, the power supply lines 7b and 8b on the right side of the figure are divided between the power supply line support members 6a and 6b, and the power supply line is guided to the lower part of the power supply line support material.
Thereby, the position of the dividing portion of the feeder lines 7 and 8 is shifted back and forth by the length of the feeder line support member 6b.
Then, by making the length of the feeder support 6b longer than the length of the power receiving coil 1, for example, even when one coil 3 crosses the divided portion, the other coil 4 faces the feeder 8b. Therefore, even in the worst case, half the maximum power can be received.

As shown in FIG. 3, the power supply line 7 is connected to the high frequency power supply device 10, the power supply line 8 is connected to the high frequency power supply device 11, and the power supply line 9 is connected to the high frequency power supply device 12.
Similarly, the dividing part of the power supply line 9 and the power supply line 8 is shifted back and forth with the parallel power supply lines.
In the embodiment of FIG. 3, an example in which the feeder line is arranged in a straight line is shown, but all the dividing positions of the feeder line divided into a plurality of feeding sections are included, including the case where the transfer device is arranged in a ring shape, Shift them back and forth with parallel feeders.

  As a secondary effect of having two coils 3 and 4 in one power receiving coil, even if an abnormality occurs in the resonance circuit or rectifier circuit of one coil, power is supplied from the remaining one system. Thus, a highly reliable power supply system by degenerate operation can be configured.

In addition, winding the coils 3 and 4 around the upper connecting portion of the E-shaped core 2 has an effect of facilitating manufacture and an effect of improving the power receiving efficiency as compared with the case of winding around the central leg portion of the core 2. .
When a coil is wound around the central leg portion of the E-type core 2, the magnetic flux flows toward an opposing surface where a part of the magnetic flux passing through the leg portion of the core 2 wants to pass through the coil portion. Magnetic flux leaking from the middle of the coil causes a reduction in efficiency.
On the other hand, when the coils 3 and 4 are wound around the upper connecting portion, there is a disadvantage that there are two coils for one of the central leg portions, but there is almost no leakage of magnetic flux in the core portion around the coils 3 and 4, and efficiency Will be better.
In addition, when winding a coil around the center leg, the wire is wound so as not to be twisted, so that the wire is unwound and wound while returning the twist. There is also a feature that the workability is good, such as insulation treatment of electric wires and filling with epoxy resin for protection.
Furthermore, by using the two coils 3 and 4, the number of turns per coil can be increased. When the number of turns is large, there is an advantage that it is easy to adjust errors caused by the production of the material such as the density variation of the ferrite material of the core by increasing or decreasing the number of turns.
Moreover, since the electric power is shared by the two coils, the current flowing through the coil is reduced, and a thin electric wire can be used.

  Thus, the non-contact power feeding device of the present embodiment forms a secondary power receiving coil by winding a coil around a core, and supplies power to the power receiving coil by electromagnetic induction from a power feeding line. In the non-contact power feeding apparatus configured as described above, the two independent coils 3, 4 are wound around the core 2 of the power receiving coil 1, and each coil 3, 4 is connected to a resonance circuit and a rectifier circuit provided independently, The rectifier circuits are joined and combined at their output portions, and the dividing positions of the feeder lines 7 and 8 divided into a plurality of feeder sections are shifted back and forth between the parallel feeder lines 7a and 8a and the feeder lines 7b and 8b. Therefore, in the case where the feeding section is divided into a plurality of parts, even when one coil crosses the divided part of the feeding line, the other coil can be opposed to the feeding line on the other side. Even in the case of It is possible to receiving half of the power of high-power.

  As mentioned above, although the non-contact electric power feeder of the present invention was explained based on the example, the present invention is not limited to the composition described in the above-mentioned example, the composition described in the example is suitably combined, etc. The configuration can be changed as appropriate without departing from the spirit of the invention.

  The non-contact power feeding device of the present invention has a characteristic that power can be stably supplied at a divided portion of a feeder line divided into a plurality of sections. In addition to being able to be used suitably for non-contact power supply devices with high stability that can ensure reliability, it can also be used for applications that stably supply power when the power supply line is divided at a branch or junction. be able to.

It is a section front view showing one example of the non-contact electric supply device of the present invention. It is a perspective view which shows the division part of the electric power feeding line of the non-contact electric power feeder. It is explanatory drawing which shows the said electric power feeding line and a high frequency power supply device.

DESCRIPTION OF SYMBOLS 1 Power receiving coil 2 E type core 3 Coil 4 Coil 5 Feed line 6 Feed line support material 7 Feed line 8 Feed line 9 Feed line 10 High frequency power supply device 11 High frequency power supply device 12 High frequency power supply device

Claims (1)

In a non-contact power feeding apparatus in which a secondary power receiving coil is formed by winding a coil around a core and power is supplied to the power receiving coil by electromagnetic induction from a power feeding line in a non-contact manner. Two independent coils are wound around the core, each coil is connected to a resonance circuit and a rectifier circuit provided independently, and each rectifier circuit is joined and combined at its output, and divided into multiple power feeding sections Three feeder support members are arranged adjacent to each other in the feeding line dividing direction, and one of the feeders arranged in parallel on both sides is arranged adjacent to the feeder line. Dividing between the first and second feeder support members arranged, leading the feeder line to the lower part of the second feeder support member, and the other feeder line arranged adjacent to the first feeder line support member Split between the second and third feeder support The feed line is guided to the lower portion of the second feed line support, and in so that shifting the divided portions of the feed lines disposed in parallel on both sides only in the longitudinal length of the second feed line support And the non-contact electric power feeder characterized by forming the length of the laying direction of the feeder line of the 2nd feeder line support material longer than the length of a receiving coil .

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