JPS6214661Y2 - - Google Patents

Description

[Detailed explanation of the idea]

The present invention relates to a leakage type electromagnetic device, and is capable of easily and firmly fixing a re-cage core and gap-forming paper using an adhesive. For example, in a leakage type transformer, a pair of leakage cores is provided in the width direction between the outer core and the inner core between the primary coil and the secondary coil, with gap forming paper interposed between them. In conventional electromagnetic devices of the species,
Adhesive (phenol-modified thermocoin resin) was applied onto the re-cage core and penetrated into the re-cage core and gap-forming paper to fix them together. Therefore, the amount of penetration of the adhesive is small, resulting in uneven penetration of the adhesive, and in order to increase the amount of penetration, it is necessary to repeat the application of the adhesive many times. The present invention solves the above-mentioned problems, and its features include the inner core 4 of the laminated core 1, which is composed of outer cores 2, 3 and inner core 4 combined in a Japanese character shape.
, leaving the center part, primary coil 5 and secondary coil 6.
A pair of re-cage cores 9, 10 in the width direction are wound between the outer cores 2, 3 and the inner core 4 between the primary coil 5 and the secondary coil 6, and the gap-forming paper 11,
In the leakage type electromagnetic device provided through the coil 5, the gap forming papers 11 and 12 are interposed between the re-cage cores 9 and 10, the coils 5 and 6, and the outer cores 2 and 3. . The primary coil 5, the secondary coil 6 and the gap forming papers 11, 12 are protruded from the end face of the laminated core 1 in the stacking direction, and are placed on the center of the inner core 4.
There is provided a concave space 13 for injecting the adhesive, which is surrounded by and. Hereinafter, the present invention will be described according to the illustrated embodiments. In FIGS. 1 to 3, numeral 1 denotes a laminated core, which is made up of a pair of outer cores 2, 3 and an inner core 4 combined in a diagonal shape. 5 is a primary coil, and 6 is a secondary coil, which are wound around the inner core 4 of the laminated iron core 1 via coil bobbins 7 and 8 so that the center portion of the inner core 4 remains. Coil bobbins 7 and 8 are inner core 4
A gap a is formed between the upper walls of the coil bobbins 7 and 8 and the upper surface of the inner core 4. Reference numerals 9 and 10 designate a pair of re-cage cores in the width direction, which are inserted and fitted between the outer cores 2 and 3 and the inner core 4 between the primary coil 5 and the secondary coil 6 via gap forming papers 11 and 12. It is worn. Gap composition paper 1
Reference numerals 1 and 12 are made of liquid-absorbing material plates such as blotting paper, and are formed in a U-shape along the inner end surfaces of the coils 5 and 6 and the inner surfaces of the outer cores 2 and 3.
The lower ends of the gap-forming papers 11 and 12 reach the lower ends of the laminated core 1 and the re-cage cores 9 and 10, and the upper ends are separated from the re-cage cores 9 and 10 so that their upper end surfaces are substantially flush with the upper surfaces of the coils 5 and 6. The gap also protrudes upward and forms a concave space 13 for injection of adhesive, which is surrounded by the coils 5 and 6 and the gap forming papers 11 and 12 above the center of the inner core 4. Next, a case will be described in which the cage cores 9 and 10 and the gap forming papers 11 and 12 are fixed using an epoxy resin adhesive. Epoxy resin adhesives have the property of penetrating the interface to be bonded when the temperature is raised to the curing temperature, and curing by holding it at that temperature.The curing conditions are as shown in the table below. .

[Table] In addition, the viscosity of epoxy resin adhesives decreases almost linearly as the temperature rises, and as the resin viscosity decreases, thixotropy becomes somewhat noticeable in terms of index, but 70
At temperatures above ~80°C, thixotropy almost disappears. Therefore, the penetration of the adhesive during curing is well maintained. Therefore, it is sufficient to inject an epoxy resin adhesive into the concave space 13, store the adhesive in the concave space 13, and then raise the temperature to the curing temperature of the adhesive. In other words, this adhesive does not permeate much at room temperature (viscosity 400±200 poise at room temperature (20°C)), and a large amount of adhesive can be stored in the concave space 13, but when the temperature is raised to 130°C, When held for about one hour, the viscosity becomes very low, the adhesive penetrates well into the re-cage cores 9, 10 and the gap forming papers 11, 12, and then hardens. Therefore, the concave space 13
Since there are
2 can be easily and firmly fixed. Moreover, since the gap forming papers 11 and 12 are made of liquid-absorbing material plates, the adhesive can be more smoothly penetrated into the re-cage cores 9 and 10 and the gap forming papers 11 and 12, which also has a noise prevention effect. noticeable.
That is, according to the experimental results, what was previously 35 phons has been reduced to 25 phons. Furthermore, the adhesive injected into the concave space 13 can be smoothly penetrated into the inner core 4 from the space a as shown by the arrow.
After hardening, the inner core 4 can be fixed more firmly, thereby stopping the vibration of the inner core 4 and reducing noise. In the embodiment described above, the concave space 13 extends approximately the entire length of the width of the coils 5 and 6, which is preferable because more adhesive can be stored there. However, as shown in FIG. 9,1
0 to the upper surface of the coils 5 and 6 and the gap forming paper 11,
12 may be made to protrude upward so as to be flush with the upper end. Further, in the embodiment described above, an epoxy resin adhesive is injected into the concave space 13, but other adhesives such as a phenol-modified thermosetting resin may be injected. According to the present invention, the gap forming papers 11, 12
is formed in a U-shape along the inner end surfaces of the coils 5, 6 and the inner surfaces of the outer cores 2, 3 so as to be interposed between the cage cores 9, 10, the coils 5, 6, and the outer cores 2, 3. One side of the gap forming papers 11 and 12 in the core lamination direction protrudes from the end face of the laminated core 1 in the lamination direction so as to be substantially flush with the end face of the coils 5 and 6 in the core lamination direction, and the inner core 4 A concave space 13 for adhesive injection, which is surrounded by the primary coil 5, secondary coil 6, and gap-forming papers 11 and 12, is provided on the center of the primary coil 5 and the secondary coil. A concave space 13 can be formed by the coil 6 and the gap forming papers 11 and 12 so as to surround the re-cage cores 9 and 10.
10 and the gap-forming papers 11, 12 are fixed with adhesive, simply injecting the adhesive into the recessed space 13 allows the re-cage cores 9, 10 to apply the adhesive to the gap-forming papers 11, 12 very efficiently. It can be penetrated sufficiently, and therefore the re-cage core and the paper forming the gap can be firmly fixed, and the work is very simple without the need for repeated application of adhesive as in the past. Moreover, since the recessed space 13 can be formed by a very simple structure in which the gap forming papers 11 and 12 are protruded, there is no need for any special member to provide the recessed space 13, and the gap forming papers 11 and 12
The protrusion of the electromagnetic device 12 does not complicate assembly of the electromagnetic device, and therefore the structure can be simplified, easily manufactured, and provided at low cost. Also gap composition paper 1
1 and 12 protrude so as to be substantially flush with the end surfaces of the coils 5 and 6 in the core lamination direction, so that the gap forming papers 11 and 12 may get in the way after assembly.
The practical effect is significant since the entire device does not become larger or unnecessary protrusions are created.

[Brief explanation of the drawing]

Figure 1 is a plan view showing one embodiment of the present invention;
3 is a sectional view of the same side, FIG. 3 is a perspective view of the same, and FIG. 4 is a perspective view of another embodiment. 1... Laminated core, 2, 3... Outer core, 4... Inner core, 5... Primary coil, 6... Secondary coil,
9, 10... Recage iron core, 11, 12... Gap forming paper, 13... Concave space.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Inner core 4 of laminated core 1, which is composed of outer cores 2, 3 and inner core 4 combined in a Japanese character shape, has a primary coil 5 and a secondary coil, leaving the center part. Wound the coil 6,
Between the outer cores 2, 3 and the inner core 4 between the primary coil 5 and the secondary coil 6, a pair of re-cage cores 9, 10 in the width direction are provided with gap forming papers 11, 12.
In a leaky electromagnetic device installed through
The gap forming papers 11 and 12 are interposed between the recage cores 9 and 10 and the coils 5 and 6 and the outer cores 2 and 3, so that the gap forming papers 11 and 12 cover the inner end surfaces of the coils 5 and 6 and the inner surfaces of the outer cores 2 and 3. It is formed in a U-shape along the side surface, and one side of the gap forming papers 11 and 12 in the core lamination direction is aligned with the end face of the laminated core 1 in the lamination direction so that it is substantially flush with the end face of the coils 5 and 6 in the core lamination direction. A concave space 13 for injecting adhesive is provided on the center of the inner core 4 and is surrounded by the primary coil 5, the secondary coil 6, and the gap forming papers 11 and 12. Characteristic leaky electromagnetic device. (2) In the leaky electromagnetic device according to claim 1 of the utility model registration claim, gap forming papers 11 and 12
A leakage type electromagnetic device characterized in that the device is composed of a liquid-absorbing material plate.