JPS62137813A - Reactor with gap - Google Patents

Abstract

PURPOSE:To adjust a gap without removing a coil from an iron core leg, by forming gap plates, by which a thickness is adjusted, by a flat plate, which is inserted between block iron cores, and a rising part, which is extended to the top end of part of the coil along both side surfaces of the block iron ocres. CONSTITUTION:A gap plate 6c has the approximately same size as other gap plates. A flat plate part 6c1 has an adjusting part 6c1', by which a thickness is adjusted, at the upper surface. A rising part 6c2 is arranged along the side surface of a block iron core and extended upward from both sides in the direction of the width so as to reach the top end part of a coil. Thus the gap plate is formed in a U shape. The gap is adjusted as follows. An upper yoke iron core 3a is removed. The bent end part of the gap plate 6c having an insulator 7 is made vertical. The gap plate 6c is removed from a coil 2a together with the inner block iron core 4a and the like. Then, a gap plate 6a, the block iron core 4a, a gap plate 6b and the block iron core 4b are removed in this order. Finally the thickness of the adjusting part 6c1' of the flat plate part 6c1 is increased or decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a reactor with a gap that facilitates adjustment of the thickness of a gap plate.

[Conventional technology]

A small-capacity reactor with a gap was produced by the Special Publication Act in 1989-289.
As shown in Publication No. 74, core legs are created by stacking, for example, three block cores on the lower yoke core with gap plates interposed between them. After inserting the coil into the core legs with an insulator interposed, the upper It is constructed by placing a gap plate between the yoke iron core and the block iron core, placing a yoke insulator between it and the upper end of the coil, and finally tightening the clamp below L with bolts and nuts.

Therefore, for this type of gapped reactor: (For phase reactors, a reactance test is performed in a semi-assembled state and the reactance value of each phase is measured. 6) If the reactance value is within the allowable range, the process proceeds to final assembly. If it is not within the range,
It is necessary to perform so-called gap adjustment in which a predetermined reactance value is obtained by changing the gap thickness.

The places where the core gap affects the coil glue actance are the gaps between each block core in the coil stack, but the increase or decrease in the gap thickness due to gap adjustment is only a few percent of the total gap thickness. Therefore, the thickness of the gap plate at the center of the core legs in the stacking direction is generally increased or decreased.

[Problem that the invention seeks to solve]

However, since this gap adjustment is performed on the saddle in a semi-assembled state, and the iron core is inserted into the coil, the gap plate whose thickness is to be adjusted cannot be easily extracted. In order to take out the gap plate when adjusting the gap, you must disassemble it in the reverse order of assembly.6 In other words, to disassemble the semi-assembled glue handle for gap adjustment, loosen the bolts and nuts and remove the upper part. After removing the clamp, remove the coil from the core leg. After removing the block iron core and the gap plate that are not adjusted one after another, the gap plate to be adjusted is taken out and its thickness is increased or decreased to a predetermined thickness. The gap plate whose thickness has been adjusted is then reassembled in the reverse order of disassembly and inserted between the block cores.

However, in conventional gapped reactors, it is necessary to remove the coil from the core leg and reinsert it into the core leg each time the gap is adjusted as described above.1. The coil must be moved significantly each time. As a result, the coils may be damaged and need to be repaired, or may fall or fall, making them unusable, resulting in delays in product delivery. Naturally, there was also the drawback that the number of man-hours required for removing and inserting coils and gap plates increased.

An object of the present invention is to provide a reactor with a gap that allows gap adjustment without removing the coil from the core leg.

[Means for solving problems]

The gap-equipped rear/cuttle according to the present invention includes an iron core having a core leg formed by stacking a plurality of block iron cores with gap plates interposed therebetween, and a coil housed in the core leg of the iron core. Among the plates, the gap plate for adjusting the thickness is configured in a U-shape consisting of a flat plate part and a rising part, and the flat plate part is inserted between the block cores,
It is also characterized in that the rising part is arranged along the side surface of the block iron core so that its upper end reaches the upper end of the coil.6 [Operation] Therefore, when adjusting the gap, the U-shaped By inserting and removing the gap plate along with the block core inside it, the coil can be removed from the core leg without having to remove it.

The gap can be adjusted by increasing or decreasing the thickness of the gap plate. This creates a gap! [! At II time, unlike the conventional method, the coil does not have to be removed from the core leg and put back in again, so the coil is not damaged and the gap adjustment work time can be shortened.

〔Example〕

The present invention will be described below with reference to the embodiments shown in FIGS. 1, 2, and 3. FIG. 1 shows three core legs la, lb, and lc of an iron core as a reactor with a gap according to the present invention.
3 shows a three-phase converter containing coils 2a, 2b, and 2c, respectively. The configuration of each core leg 1a, lb, lc and the combination configuration with each coil 2a, 2b, 2c are the same for each phase, so for convenience, the details of core leg 1a and coil 2a will be explained on behalf of each other. I'll decide.

In FIG. 1, the core leg 1a has three block cores 4a, 4b, and 4c sandwiched between an upper yoke core 3a and a lower yoke core 3b. And a gap plate 6a between the upper yoke core 3a and the block core 4a,
A gap plate 6b is inserted between block cores 4a and 4b, a gap plate 6c is inserted between block cores 4b and 40, and a gap plate 6d is inserted between block core 4c and lower yoke core 5a. These gap plates 6
8 to 6d are usually formed of a laminate of thin pressed boards or compound boards.

Therefore, the present invention is characterized in that among the gap plates 68 to 6d, the gap plate 6c at the center in the stacking direction, whose thickness is adjusted, is constructed as shown in FIG. That is, in FIG. 2, the gap plate 6C has approximately the same size as the other gap plates, and has a flat plate part 6e1 having an adjustment part 6c1'k on the upper surface for adjusting the thickness, and a flat plate part 6e1 rising from both sides in the width direction. It is disposed along the side surface of the block iron core, and has a U-shaped configuration including a rising portion 6c2 whose upper end has a length reaching at least the upper end of the coil. Note that an insulator 7 forming a duct is provided at the tip of the rising portion 6c2 of this gap plate 6C.
If the coil is bent during assembly and used as a yoke insulator for the coil, the number of parts can be reduced.

Next, the operation of the reactor with a gap of the present invention configured as described above will be explained. First, to assemble the reactor with a gap of the present invention, as shown in FIG. 1, lower yoke core 3b is placed on the upper surface of lower clamp 8b, and gear plate 6d and block core 4c are assembled to core leg 1a in this order. On the other hand, insert the block iron core 4b as shown in FIG. 3 into the U-shaped gap plate 6c shown in FIG.
, block iron core 4a, and gap plate 6a are placed in this order. Then, the gap plates 6c, 6b, 6a and the block cores 4b, 4b are assembled (2) and placed on the block core 4C to assemble the core leg 1a.

After placing the lower yoke insulator 9b on the lower yoke core 3b of the core leg 1a, the coil 2a is inserted from both sides. Then, as shown in FIG. 3, the straight rising portion 6c2 of the gap plate 6C is bent from the dotted line to the solid line position.
By bending the tip of the rising portion 6c2, the insulator 7 provided on the tip and one side of the rising portion 6c2 rests on the end of the coil 2a, thereby serving as a yoke insulator. After this, the upper yoke core 5a is attached to each core leg], a, Ib,
Place it on the upper surface of the holder and tighten it with the bolt 9 and nut 10 via the upper clamp 8a.

To perform gap adjustment on this semi-assembled glue handle, first remove the upper yoke core 3a. Next, the bent end portion of the gap plate 6c having the insulator 7 shown in FIG. 3 is made vertical as shown by the broken line, and the gap plate 6c is extracted from the coil 2a together with the block core 48 and the like inside thereof. From the state shown in Figure 3, which was taken out from this coil on the 2nd day,
Remove the gear lug plate 6a, block core 4a, gap plate 6b and block core 4b in this order, and finally remove the flat plate part 6.
c. Increase or decrease the thickness of the adjustment portion 601'.

After adjusting the thickness of the flat plate part 6cm, the block cores 4b, 4a and the gap plates 6b, 6a are reassembled to the gap plate 6C in the reverse order and returned to the coil 2a.

Then, the end of the rising portion 6c2 of the gap plate 6c is bent to the solid line position, the insulator 7 is applied to the upper end of the coil 2a, the upper yoke core 3a is placed on top of the insulator 7, and the upper clamp 8
Tighten bolts 9 and nuts 10 through a to complete the assembly.

In the above embodiment, the flat plate portion 6c1 and the rising portion 6c2 of the gap plate 6c are constructed as one piece by bending, but they may be constructed by mechanically connecting separate members. Further, the rising portion 6c2 is not limited to a flat plate shape, but may be rod-shaped, and further, the adjustment portion 601' of the flat plate portion 6c1 may be separated from the flat plate portion 6c.

[Effects of the idea]

As described above, the present invention has a core leg configured by stacking a plurality of block cores through gap plates, and adjusts the thickness of the gap plate between each block core of the core leg. The gap plate is composed of a flat plate part inserted between the block cores and a rising part that runs along both sides of the block core and extends to the upper end of the coil, so when adjusting the gap, the rising part can be adjusted without removing the coil. The thickness of the flat plate part of the gap plate can be increased or decreased by inserting or removing the block core using the
There is no need to remove and insert the coil each time the gap is adjusted as in the past, and there is no need to damage the coil.

[Brief explanation of drawings]

Fig. 1 is an arrangement diagram of a coil and an iron core showing an embodiment of gear-attached gears 1 to 1 according to the present invention, Fig. 2 is a perspective view showing a central gap plate used in the present invention, and Fig. 3 is a diagram showing an arrangement of a coil and an iron core. FIG. 3 is a configuration diagram showing the arrangement relationship between a central gap plate and a block iron core. la, lb, 1c・= iron core leg 2a, 2b
, 2cm coil 3a...upper yoke core 3
b...Lower yoke core 4a, 4b, 4c...Block core 6a, 6b, 6c...Gap plate 6
C□...Flat plate part 60□'...Adjustment part 6c2...Rising part 7...Insulator 8
a, 8b...Clamp 9...Bolt 1
0... Natsuto (8733) Agent Patent attorney Yoshiaki Inomata (and 1 others)
Figure 1 Figure 2 Figure 3

Claims (2)

[Claims] (1) In a core comprising a core leg formed by stacking a plurality of block cores with gap plates interposed therebetween, and a coil housed in the core leg of the core, the thickness of the gap plate The gap plate to be adjusted is configured in a U-shape consisting of a flat plate part and a rising part, and the flat plate part is inserted between the block cores, the rising part is arranged along the side surface of the block core, and the upper end thereof is arranged between the block cores. A reactor with a gap characterized by being positioned so as to reach the upper end of the coil. (2) A reactor with a gap according to claim 1, characterized in that an insulator that also serves as a yoke insulator of the coil is integrally provided at the upper end of the rising portion extending along the side surface of the block iron core.