JPH0950921A - Iron-core reactor with gap - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an iron-core reactor with gap wherein it is possible to smoothly pack unit sections, obtained by laminating silicon steel strips sequentially, starting with the longest one and ending with the shortest one, with their ends aligned on one side, and wherein the automatization of packing work is possible. SOLUTION: Silicon steel strips 1 having the same width, different from one another in length, are sequentially laminated starting with the longest one and ending with the shortest one, with their ends aligned on one side. The silicon steel strips are integrated together to form a right-triangled unit section 2. At this time the angle θ of the right-angled area is controlled to a value 3.5±2 deg. smaller than 90 deg.. These unit sections 2 are radially packed into a cylindrical molding frame with an insulating sheet in-between. The workpiece is then impregnated with synthetic resin, and the resin is hardened to bond the unit sections together to form a core block. The core block is used to form an iron-core reactor with gap.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reactor core, and more particularly to a core block of a core core reactor with a gap.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, a core block of an iron core reactor with a gap has a substantially triangular unit section 7 obtained by equally dividing a circular cross section of a core block 6 in a circumferential direction. The insulating sheet 8 such as a glass tape is interposed on the inner wall of the cylindrical mold P placed on, and the inside is radially packed, impregnated with the synthetic resin and adhesively cured, and then the mold P is removed. It is formed.

Unit section 7 of core block 6
As shown in FIG. 6, strip-shaped silicon steel plates 9 each of which has the same width and is cut to a required length are formed into a right-angled triangle by aligning one end face side in a stepwise manner from a long piece to a short piece. The unit block 7 is pressed inward in the direction of the arrow 10 to the inside of the insulating sheet 8 interposed between the inner walls of the mold, and is sequentially packed radially, impregnated with synthetic resin and adhesively cured to form the core block 6. Was there.

The strip-shaped silicon steel plate 9 of the unit section 7 is automatically cut by the cutting equipment and the processing equipment, and is laminated for each section.

Next, the operator sets the unit section 7 to 1
The core block 6 is molded by arranging the sections, and radially packing them in the inner wall of the mold via the insulating sheet 8 as shown in FIG.
When molding the core block 6, as shown in FIG. 6, a cylindrical core is placed in the center, synthetic resin is impregnated and adhesively cured, and then the core is removed to remove the tightening bolt. A round hole 11 for use is formed.

When the core block 6 and an insulating plate (not shown) for forming a magnetic gap are alternately stacked and integrally formed to form an iron core leg with a gap (not shown), this round bolt for tightening bolt is used. A core tightening bolt (not shown) is inserted into the hole 11.

[0007]

The core block of the core-reactor reactor with a gap described in the prior art has the following problems.

When the unit sections are assembled radially, the outer end face must be aligned with the inner face of the cylindrical form. At present, as shown in FIG. 6, when one end of a unit section is at a right angle and an operator packs it into each section, the inner surface of the cylinder of the formwork is an arc, so that the end face of the cylinder of the formwork is It is necessary to stuff it while forming it in an arc shape so as to match the inner surface.

When the work of packing each unit section is automated, it is necessary to make one end face arcuate so that it fits the inner surface of the cylinder of the mold.

The present invention has been made in view of the above problems of the prior art, and a strip-shaped silicon steel plate is provided.
To provide a core block of a core-shaped reactor with a gap that enables smooth packing work of unit sections that have one end side aligned and is sequentially stacked from a long piece to a short piece in a stepwise manner and that can be packed automatically. With the goal.

[0011]

In order to achieve the above object, the core block of the cored reactor with a gap according to the present invention is made of strips of silicon steel sheets having the same width and different lengths, with one end surface aligned. From the long piece to the short piece in a stepwise manner to form a right-angled triangular unit section, and the angle θ of the right-angled portion of this unit section is 90 degrees to θ = 3.
A unit section is formed by reducing the size by 5 ± 2.0 degrees, and this unit section is radially packed inside the cylinder of the formwork via an insulating sheet, impregnated with synthetic resin and adhesively cured to form a core. Mold the block. Then, the core blocks and the insulating plates forming the magnetic gaps are alternately stacked and integrally formed to form a core leg with a gap to form a reactor core.

As described above, the angle of the right-angled portion of the one end face of the unit section is reduced from 90 ° by θ = 3.5 ° ± 2.0 ° so as to fit with the inner surface of the cylinder of the mold, and integrated. The unit block is formed by packing it inside the cylinder of the formwork radially, impregnating it with a synthetic resin, and curing it by adhesion to form the core block. Yes, automation is possible.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION A core block embodiment of a cored reactor with a gap according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view showing a core block of an iron core reactor with a gap according to the present invention, FIG. 2 is a plan view showing one unit section, and FIG. 3 is one unit section of the core block and an inner surface of an insulating sheet. FIG. 4 is a plan view showing the positional relationship, and FIG. 4 is an enlarged plan view showing the shape of the unit section on the one end face side, and FIG. 1, FIG. 2, FIG. 3 and FIG.
As shown in Fig. 3, rectangular silicon steel plates 1 having the same width and different lengths are aligned stepwise from the long piece to the short piece in order to form a right-angled triangular unit section 2. The angle θ of the right-angled portion of the unit section 2 that forms The core block 4 is formed by radially packing the insulating sheet 3 interposed on the inner wall of the mold, impregnating it with a synthetic resin, and adhering and hardening the resin. When impregnating the synthetic resin, a cylindrical core is put in as in the conventional example, and after hardening, the core is removed to form the round hole 5 for the tightening bolt.

The angle θ between the one end face of the unit section 2 and the vertical direction depends on the outer diameter of the core block and the number of divisions of the section.
Since it is within the range of 36 to 60, this angle θ is 90 degrees −
If it is set to (3.5 degrees ± 2.0 degrees), it can be easily packed in the cylinders of the mold, and the gap between the cylinders of the mold can be reduced.

Thus, the angle θ between the one end face of the unit section 2 and the vertical direction is θ = 3.5 degrees ± 2.0
By forming it at an angle of more than 90 degrees, it fits the curve inside the cylinder of the formwork and facilitates the packing work.

[0017]

Since the present invention is configured as described above, the following effects can be obtained.

By forming one end face of the unit section not 90 degrees but smaller than 90 ° by θ = 3.5 ° ± 2.0 °, the end faces are aligned after being inserted into the inner surface of the cylinder of the formwork. There is no need.

As a result, the work of packing the unit sections can be performed smoothly.

The packing operation can be automated.

[Brief description of drawings]

FIG. 1 is a plan view of a core block of an iron core reactor with a gap according to the present invention.

FIG. 2 is a plan view of a unit section used in the present invention.

FIG. 3 is a plan view showing the positional relationship between the unit section of the present invention and the inner surface of the insulating sheet.

FIG. 4 is an enlarged view of a main part of FIG.

FIG. 5 is a perspective view of a core block of a conventional iron core reactor with a gap.

FIG. 6 is an enlarged view of a main part of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Silicon steel plate 2 ... Unit section 3 ... Insulating sheet 4 ... Core block 5 ... Clamping bolt round hole θ ... Angle (degree) between the laminated end face of the silicon steel plate on one end face side of the unit section and the vertical direction

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location H01F 27/24 L

Claims (1)

[Claims] 1. A strip of right and left silicon steel sheets of strips having the same width and different lengths, which are aligned in one end face side in order from a long strip to a short strip, are stepwise stacked to form a right triangle unit section. Radially packed inside a cylindrical form via an insulating sheet, impregnated with synthetic resin and adhesively cured to form a core block, and alternately stack the core block and an insulating plate forming a magnetic gap. In the cored reactor with a gap, which is integrally formed as a core leg with a gap, the unit section forming the right triangle has an angle θ of the right angled portion from 90 degrees to θ =
Forming an integrated unit section by making it smaller by 3.5 ± 2.0 degrees, packing this unit section radially inside an insulating cylinder, impregnating with synthetic resin and adhering and curing to form a core block. Iron core type reactor with a gap.