JP6577352B2 - Stationary induction equipment - Google Patents

Description

  The embodiment relates to a stationary induction device.

  Some stationary induction devices have an annular wound core. This wound iron core is constructed by cutting an annular magnetic material that overlaps a plurality of layers into a plurality of non-annular divided cores and combining a plurality of divided iron cores in a ring shape. They are assembled after the windings are mounted on a predetermined split core.

Japanese Patent Laid-Open No. 07-220941

  In the case of the above-described conventional static induction device, it is impossible for the operator to visually recognize the combination portion between the plurality of divided cores. For example, the operator visually confirms whether there is a positional shift between the plurality of divided cores. I couldn't.

Quiescent induction device includes an annular wound core, which comprises a winding provided on the winding core, the winding core is a plurality of acyclic obtained by cutting the magnetic material of ring overlapping a plurality of layers It is configured by combining the divided iron cores inside the winding, and a gap is formed between the wound iron core and the windings so that a combination portion between the plurality of divided iron cores is visible. Have

The figure which shows Example 1 (The figure which shows the external appearance of a transformer) The figure which shows a part of upper division iron core and a part of lower division iron core in the division state between both The figure which shows Example 2 (figure 1 equivalent figure) 2 equivalent diagram The figure for demonstrating the visual recognition area of a wound iron core

  A wound core 1 in FIG. 1 is used as an iron core of a transformer and has a quadrangular ring shape having two legs 2 and two yokes 3. Each of the leg portions 2 is longer than the yoke portion 3 and has a straight shape facing each other in the left-right direction. Each of the yoke portions 3 is shorter than the legs 2 and connects between the legs 2.

  As shown in FIG. 1, the wound core 1 is configured by combining the upper divided core 4 and the lower divided core 5. The upper divided iron core 4 and the lower divided iron core 5 are formed in a non-annular shape by cutting a quadrangular annular magnetic material overlapping a plurality of layers in the circumferential direction from two cutting positions. Iron-based amorphous ribbons are used.

  A resin layer is formed on the wound core 1. This resin layer is formed by impregnating the rectangular annular magnetic material with resin before cutting the rectangular annular magnetic material into the upper divided iron core 4 and the lower divided iron core 5, and covers the entire surface of the wound iron core 1. Covering. Each of the upper divided iron core 4 and the lower divided iron core 5 corresponds to a divided iron core.

  As shown in FIG. 1, two insulating sheets 6 are attached to the wound core 1. Each of these two insulating sheets 6 has electrical insulation, and controls the magnetic resistance of the wound core 1. Each of these two insulating sheets 6 is made of aramid paper and corresponds to an insulating material. Each of these insulating sheets 6 is interposed between the cut surface 7 and the cut surface 8. Each of the cut surface 7 and the cut surface 8 is formed when cutting a quadrangular annular magnetic material, and each of the cut surfaces 7 refers to an end surface at the leg portion 2 of the upper divided iron core 4. Each of the cut surfaces 8 refers to an end surface at the leg portion 2 of the lower divided iron core 5.

  As shown in FIG. 1, two insulating cylinders 9 are attached to the wound core 1. Each of these two insulating cylinders 9 has a rectangular cylindrical shape, and is fitted into the outer peripheral surface of the leg portion 2. Each of these two insulating cylinders 9 has electrical insulation, and as shown in FIG. 2, the distance between the left and right surfaces in both insulating cylinders 9 is between the left and right surfaces of the leg 2. It is set larger than the width dimension. The front surfaces of the two insulating cylinders 9 are in contact with the front surfaces of the leg portions 2, and the rear surfaces of the two insulating cylinders 9 are in contact with the rear surfaces of the leg portions 2.

  As shown in FIG. 1, windings 10 are mounted on the outer peripheral surfaces of both insulating cylinders 9. Each of these two windings 10 is set to have the same length in the axial direction as the insulating cylinder 9, and the upper end surfaces of both windings 10 are on the same plane as the upper end surface of the insulating cylinder 9. The lower end surfaces of both windings 10 are located on the same plane as the lower end surface of the insulating cylinder 9.

  As shown in FIG. 2, both the insulating cylinders 9 are fitted into the outer peripheral surface of the leg portion 2 of the lower divided core 5 from above in a divided state before the upper divided core 4 and the lower divided core 5 are combined. Thus, the respective fitting operations of both the insulating cylinders 9 are performed in a state where the windings 10 are mounted. Each of the two insulating sheets 6 is placed from above on the cut surface 8 of the lower divided iron core 5 after the two insulating cylinders 9 are fitted, and each of the two cut surfaces 7 of the upper divided iron core 4 is formed of the two insulating sheets 6. After mounting, the insulating sheet 6 is mounted on the cut surface 8 of the lower split iron core 5.

  As shown in FIG. 1, a binding band 11 is attached to the wound core 1. This binding band 11 surrounds the outer peripheral surface of the wound iron core 1, and is between the left face of the left leg 2 and the left face of the left insulating cylinder 9 in a combined state between the upper divided iron core 4 and the lower divided iron core 5. It is inserted into the gap and is inserted between the right surface of the right leg 2 and the right surface of the right insulating cylinder 9.

  As shown in FIG. 1, the binding band 11 contacts the left surface of the left leg 2 and the left surface of the left insulating cylinder 9 while being attached to the upper divided iron core 4 and the lower divided iron core 5. The right side of the leg 2 and the right side of the right insulating cylinder 9 are in contact with each other. When the binding band 11 is attached, the right surface of the left leg 2 and the right surface of the left insulating tube 9 are in contact, and the left surface of the right leg 2 and the left surface of the right insulating tube 9 are in contact. Yes.

  As shown in FIG. 1, the binding band 11 has a binding tool 12. This binding tool 12 tightens the binding band 11 by connecting between one end and the other end of the binding band 11, and the upper split iron core 4 and the lower split iron core 5 are tightened by the tightening force of the binding band 11. The both insulating sheets 6 are clamped between the cut surface 7 and the cut surface 8 by the fastening force between the upper divided iron core 4 and the lower divided iron core 5.

  As shown in FIG. 1, the upper split iron core 4 and the lower split iron core 5 are fixed by connecting the one end and the other end of the binding band 11 with the binding tool 12. In a fixed state between the upper divided iron core 4 and the lower divided iron core 5, both the cut surfaces 7 of the upper divided iron core 4 and both cut surfaces 8 of the lower divided iron core 5 are the upper end surface of the insulating cylinder 9 and the upper end surface of the winding 10, respectively. Both insulating sheets 6, both cut surfaces 7, and both cut surfaces 8 are exposed outside both the insulating cylinder 9 and the winding 10.

  As shown in FIG. 1, an adhesive tape 13 is wound around the wound iron core 1 so as to be positioned on each of the leg portions 2. Each of these two adhesive tapes 13 is formed by applying an adhesive to an insulating synthetic resin, and covers the combination portion between the upper divided iron core 4 and the lower divided iron core 5 from above the insulating sheet 6. Each of these adhesive tapes 13 closes the space between the cut surface 7 of the upper divided iron core 4 and the cut surface 8 of the lower divided iron core 5 in a watertight state, and corresponds to a sealing portion.

According to the said Example 1, there exists the following effect.
The upper divided iron core 4 and the lower divided iron core 5 were combined outside the winding 10. Therefore, since the combination part between the upper divided iron core 4 and the lower divided iron core 5 can be visually recognized, for example, the operator binds the upper divided iron core 4 and the lower divided iron core 5 with the binding band 11 with the winding 10 attached. In this case, it is possible to confirm at a glance whether there is a positional shift between the two. Moreover, since the insulating sheet 6 can be visually recognized with the windings 10 mounted, for example, the operator can confirm at a glance whether there is a positional shift with respect to the upper divided iron core 4 and the lower divided iron core 5 of the insulating sheet 6. it can.

  The combination portion between the upper divided iron core 4 and the lower divided iron core 5 was sealed with an adhesive tape 13. Accordingly, moisture can be prevented from entering the combined portion between the upper divided iron core 4 and the lower divided iron core 5, so that rust is generated on each of the cut surface 7 of the upper divided iron core 4 and the cut surface 8 of the lower divided iron core 5. Can be prevented. Moreover, since the upper divided iron core 4 and the lower divided iron core 5 are combined outside the winding 10, the winding operation of the adhesive tape 13 is facilitated with the winding 10 mounted.

In the first embodiment, the wound iron core 1 may be divided into two parts, the left divided iron core and the right divided iron core, by the double yoke part 3.
In the first embodiment, the wound core 1 may be divided into three or more divided cores outside the insulating cylinder 9 and the winding 10.

  As shown in FIG. 3, the upper divided core 4 and the lower divided core 5 are configured by cutting a rectangular annular magnetic material that overlaps a plurality of layers at positions inside the insulating cylinder 9 and the winding 10, respectively. Each of the cut surfaces 7 of the upper divided iron core 4 is set in the vicinity of the upper end surface of the inside of the insulating tube 9 and the winding 10, and each of the cut surfaces 8 of the lower divided iron core 5 is also formed of the insulating tube 9 And it is set in the vicinity of the upper end surface in the inside of the winding 10.

  As shown in FIG. 4, the front surfaces of both leg portions 2 of the wound core 1 are spaced rearward with respect to the front surface in the insulating cylinder 9, and between the front surface of the leg portion 2 and the front surface in the insulating cylinder 9. A gap 21 is formed. FIG. 5 shows a state in which the operator looks into the space between the front surface of the leg portion 2 and the front surface in the insulating tube 9 from above through the gap 21 at an angle θ ° (30 °). It is a visual recognition area above the line of sight L on the front surface. This visual recognition area E is an area in which the operator can visually recognize from the outside of the front surface of the leg portion 2, and both the cut surfaces 7 of the upper divided iron core 4 and both cut surfaces 8 of the lower divided iron core 5 are oblique. The insulating sheet 6 is disposed in the visual recognition area E so as to be visible through the gap 21 from the front, and the both insulating sheets 6 are also disposed in the visual recognition area E so as to be visible through the gap 21 from the front.

  As shown in FIG. 3, a resin sealing portion 22 is formed on the wound core 1 so as to be positioned on the front surfaces of the both leg portions 2. Each of the resin sealing portions 22 is obtained by curing a resin having viscosity, and the resin is applied by the applicator in accordance with the insertion of the applicator into the gap 21 after the binding band 11 is attached. The resin sealing portion 22 is for watertightly closing the combined portion between the upper divided iron core 4 and the lower divided iron core 5 from above the insulating sheet 6 and corresponds to a sealing portion.

According to the said Example 2, there exist the following effects.
A gap 21 was formed between the wound core 1 and the winding 10. Accordingly, the combination portion between the upper divided iron core 4 and the lower divided iron core 5 can be visually recognized despite being located inside the winding 10, so that, for example, an operator can connect between the upper divided iron core 4 and the lower divided iron core 5. Can be confirmed at a glance whether or not there is a positional shift between the two when the winding 10 is bound by the binding band 11. Moreover, since the insulating sheet 6 can be visually recognized with the windings 10 mounted, for example, the operator can confirm at a glance whether there is a positional shift with respect to the upper divided iron core 4 and the lower divided iron core 5 of the insulating sheet 6. it can.

  Since the combination portion between the upper divided iron core 4 and the lower divided iron core 5 is sealed with the resin sealing portion 22, rust is generated on each of the cut surface 7 of the upper divided iron core 4 and the cut surface 8 of the lower divided iron core 5. Can be prevented. In addition, since the gap 21 is formed between the wound core 1 and the winding 10, the combination portion between the divided core 4 and the lower divided core 5 can be visually recognized in the mounted state of the winding 10. The resin application work becomes easy in the mounted state.

  In the second embodiment, an annular magnetic material overlapping a plurality of layers may be cut so that the cut surface 7 of the upper split core 4 is on the same plane as the upper end surfaces of the insulating cylinder 9 and the winding 10, In short, the cutting may be performed so that the cut surface 7 of the upper divided iron core 4 and the cut surface 8 of the lower divided iron core 5 are within the viewing region E.

In the second embodiment, a gap having the same width as the gap 21 may be formed between the rear surface of the leg 2 and the rear surface of the insulating tube 9 instead of the front surface of the leg 2 and the front surface of the insulating tube 9. good.
In the second embodiment, a gap having the same width as the gap 21 may be formed between the rear surface of the leg portion 2 and the rear surface of the insulating tube 9 in addition to the front surface of the leg portion 2 and the front surface of the insulating tube 9. good.

In the said Examples 1-2, you may use PET film etc. which are different from an aramid paper as the insulating sheet 6. FIG.
In the said Examples 1-2, you may abolish both the insulation sheets 6. FIG.

In the said Examples 1-2, you may apply this invention to static induction apparatuses, such as a reactor different from a transformer.
As mentioned above, although the Example of this invention was described, this Example is shown as an example and is not intending limiting the range of invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention and are also included in the invention described in the claims and the equivalent scope thereof.

  1 is a wound iron core, 4 is an upper divided iron core (divided iron core), 5 is a lower divided iron core (divided iron core), 6 is an insulating sheet (insulating material), 10 is a winding, 13 is an adhesive tape (sealing part), 21 Is a gap, and 22 is a resin sealing portion (sealing portion).

Claims (3)

An annular wound core,
The winding core includes a winding provided on the winding core, and the winding core is configured by combining a plurality of non-annular divided cores formed by cutting an annular magnetic material overlapping a plurality of layers inside the winding. And
A static induction device characterized in that a gap is formed between the wound iron core and the windings so that a combination portion between the plurality of divided iron cores is visible. The stationary induction device according to claim 1 , wherein the wound iron core is provided with an insulating material positioned between the plurality of divided iron cores. The winding on the iron core, the stationary induction apparatus according to claim 1 or 2, characterized in that sealing portions for sealing a combination portion between the plurality of divided cores is provided.

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