JPH0656819B2 - Method for manufacturing static induction electrical equipment - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a static induction electric device equipped with a one-turn cut type winding core made of an amorphous magnetic alloy ribbon.

[0002]

2. Description of the Related Art In recent years, various studies have been made on the use of amorphous magnetic alloy ribbons (hereinafter simply referred to as magnetic ribbons) as core materials for wound cores used in stationary induction electric equipment such as distribution transformers. Has been done. This magnetic ribbon is manufactured by ultra-quenching a melt of a magnetic alloy and has a very small iron loss and excellent magnetic characteristics. And, for example, in the case of manufacturing a transformer for distribution using the wound core made of the magnetic ribbon, the uncut type wound core having no joint formed by continuously winding the magnetic ribbon is adopted. Often. However, in the uncut type winding core, the winding has to be wound directly on the iron core, so that the winding work is troublesome and the occupation ratio of the iron core in the insulating cylinder inside the winding is good. In order to keep it, the cross section of the iron core has a stepped shape close to a circle, which complicates the manufacturing process of the wound iron core. In addition, since the winding itself was wound using a special jig, the diameter size inevitably became large, the entire transformer became large, and not only the weight increased but also the manufacturing cost inevitably. There were problems such as raising it.

On the other hand, there is also a case where a one-turn cut type wound iron core is used in which magnetic thin strips cut one by one are sequentially inserted into a winding. This wound core is, for example, a unit laminated core in which a plurality of unit cores (number + sheets) obtained by cutting a magnetic ribbon for each turn are combined to form a unit laminated core, and the unit laminated core is further laminated into a plurality of layers to form a unit laminated core. A block (hereinafter, simply referred to as a laminated block) is formed, and in assembling a wound core, the laminated block is wound and the ends of the unit laminated core are sequentially stepwise shifted and joined together by abutting or overlapping, The blocks were further laminated in the same manner as the required number of layers as described above to form a one-turn cut type winding core having a predetermined laminated thickness.

The 1-turn cut type wound core laminated as described above is subjected to magnetic field annealing after forming a rectangular shape with a joint such as a butt located on one side of the yoke portion. After the annealing, the wound core opens the joint portion of the yoke portion for each laminated block, and as shown in FIG.
a and 1b are sequentially assembled in the iron core insertion hole 2a of the winding 2, and the joining portions 3 of the laminated blocks 1a and 1b are joined again to complete the interlinking of the magnetic circuit and the conducting circuit, and It was being assembled.

[0005]

However, when the wound core of the one-turn cut type is manufactured by the conventional technique, there are various problems as described below.

(1) Since the magnetic ribbon is poor in rigidity and is extremely weakened by annealing, as described above, when the cores are assembled by sequentially inserting the laminated blocks into the windings, When the laminated block collides with the winding, collides with a laminated block already incorporated in the winding, or when the winding core is assembled and then the transformer is assembled using the winding core, the laminated end face of the iron core, etc. When an external force is applied to, the corners and laminated end faces of the wound iron core are easily broken or peeled off to generate fragments. If the debris remains in the core insertion hole of the winding after the winding core is assembled, it will stray due to convection of insulating oil during operation of the transformer and enter between the layers of the winding to cause an interlayer short-circuit accident. There was a problem of inducing.

(2) Further, as described above, since the magnetic ribbon is poor in rigidity, when the laminated blocks are individually divided and assembled in assembling the wound core, as shown in FIG. As the core assembly was performed by collapsing the shape of the above and expanding the core of each laminated block greatly, it may cause self-weight deformation or internal distortion etc. may adversely affect the magnetic characteristics. It is necessary to pay close attention, and there is a problem in that the work of assembling this kind of wound core cannot be carried out smoothly and efficiently.

(3) Further, since the magnetic ribbon is manufactured to be extremely thin and is weakened by annealing, when each laminated block is sequentially incorporated in the winding, the self-sustaining property is extremely poor, and it is crushed. Therefore, the laminated block of the previous layer inserted in the winding should be self-supported by using a special jig etc. until the laminated block of the next layer is inserted. There was a need. Therefore, the assembling efficiency of the wound core is very poor, which is a major factor that hinders the mass productivity of this type of wound core.

In view of the above-mentioned problems, the present invention surely prevents the magnetic ribbon from being peeled off and broken at the time of assembling the iron core and the like, and the iron core itself is provided with the self-standing property, so that the magnetic properties are excellent and It is an object of the present invention to provide a method for manufacturing a static induction electric device capable of improving productivity.

[0010]

The present invention provides a magnetic ribbon 1
A required number of reinforcing frames made of, for example, a silicon steel strip having a plate thickness thicker than that of the magnetic thin strips are arranged on the outer peripheral surface of the wound core core body wound by the turn-cut method. The iron core element is formed into a rectangular shape and magnetic field annealed to form a wound iron core.After this magnetic field annealing, among the plurality of reinforcement frames arranged on the inner peripheral surface of the wound iron core, the innermost peripheral portion is positioned. Remove a part of the reinforcement frame. Next, the leg iron portion of the winding core is provided with, for example, a room temperature curable adhesive in order to prevent peeling of the laminated end surface of the leg iron portion which is weakened by annealing and strengthen the rigidity of the leg iron portion itself. To a certain distance, and in this state, apply thin insulating material such as interlayer insulation paper so as to wrap the entire leg iron part, and use adhesive tape to apply stress to the magnetic ribbon Tighten it.

Next, using the joint portion of the winding core, the yoke portion side having this joint portion is arranged in the direction of the same line as the leg iron portion so that the plane shape is U-shaped. Open and fit the winding from the opened yoke to the leg iron using the opened yoke, and then rejoin the released yoke at its joint. To reshape the winding core into a rectangular shape. Next, apply a room temperature curable adhesive to the entire area of the laminated end surface of the yoke part of the winding core incorporating the winding wire, and apply an end face coated paper made of a thin insulating material to the coated surface of the adhesive. The work for assembling the winding core into the winding is completed by completely covering the laminated end surface of the yoke portion from the outside.

Subsequently, after the winding iron core is assembled, a guide plate made of a strip-shaped insulator is inserted into the outer periphery of the leg iron portion of the winding iron core through a reinforcing frame within a range that does not project from the upper and lower ends of the yoke portion. In addition, a wedge-shaped guide holding plate is fitted in the gap between the guide plate and the winding in the widthwise central portion of the guide plate to fix the winding to the winding core. In this state, the winding iron core is erected, and the winding clamps are inserted between the upper and lower clamps and the widthwise end faces of the winding while applying the U-shaped clamps to the upper and lower portions of the yoke. In addition, a thick insulating plate such as a press board is interposed between the clamp and the end face coated paper of the yoke to prevent the upper and lower clamps from colliding with the outer peripheral surface of the yoke of the winding core. Arranged at intervals, above,
The lower clamp is tightened with a tightening band that is inserted in the gap between the guide plate and the winding, and is fixedly supported on the axial end surface side of the winding through the winding retainer. It is characterized in that a stationary induction electric device such as the above is manufactured.

[0013]

According to the static induction electric equipment of the present invention, a required reinforcing frame made of a material different from that of the magnetic ribbon is provided on the inner and outer peripheral surfaces of the wound iron core formed by winding the magnetic ribbon. The leg iron portion of the winding core is provided with means for surrounding the thin leaf insulator to prevent loss and peeling of the magnetic ribbon, and further, the laminated end surface of the yoke portion of the winding iron core and the leg iron. At the outside of the part, a winding iron core, which is weakened by annealing due to the provision of an insulating material of a predetermined thickness, at the time of assembling the wound iron core, or when performing a transformer assembly using the wound iron core, Even if an external force is applied to the winding core or mechanical vibration or the like is transmitted during transfer, the winding core is buffered by the insulating members provided on the inner and outer peripheral surfaces and the laminated end surface, respectively, and is wound. It is possible to prevent damage to the iron core and internal distortion, and It is possible to manufacture the stationary induction electrical apparatus with excellent.

Further, since the wound iron core itself is entirely covered with the insulating member as described above, even if a part of the wound iron core is lost due to an external force or the like, and a magnetic ribbon fragment is generated, the fragment is broken. Since it can be contained inside the wound iron core, it is possible to reliably eliminate the harmful effects such as the interlayer short circuit accident caused by the fragments of the magnetic ribbon.

Further, according to the present invention, since the reinforcing frame made of, for example, a silicon steel strip, which is thicker than the magnetic ribbon, is arranged on the inner and outer peripheral surfaces of the winding iron core, the winding iron core has increased rigidity. In addition to that, it is possible to strengthen its self-supporting property, and it is possible to surely prevent self-weight deformation and deformation when assembling the winding iron core. As a result, the winding iron core is formed into a unit laminated block having an appropriate thickness. There is no need to divide and assemble each unit at all, and the winding iron core is expanded in a U shape by utilizing the joint portion of the yoke, and the winding is performed in almost one operation. The wound iron core can be assembled by fitting into. Therefore, according to the present invention, the assembling work of the wound core is facilitated in combination with the measures for preventing the magnetic ribbon from coming off.
It can be carried out satisfactorily, and the productivity of the wound core made of magnetic ribbon can be remarkably improved.

[0016]

Embodiments of the present invention will be described below with reference to FIGS. In FIG. 1, reference numeral 11 denotes a winding shaft drivingly connected to a winding machine (not shown).
2 is detachably attached, and the winding frame 12 is rotated,
Each time an amorphous magnetic alloy ribbon (hereinafter referred to as a magnetic ribbon) T is wound around the winding frame 12, the cutting device 13 cuts the magnetic ribbon T in a circular shape a predetermined number of times for one turn. A wound core element body 14 serving as an original form of a cut wound core is formed.
The winding frame 1 is used for winding the wound core body 14.
A magnetic belt (not shown) is wound around the peripheral surface of the winding core body 14 via the guide roller 15 so that the single sheet of the magnetic ribbon cut during the winding of the winding core 2 does not fall off the winding frame 12. It is hung.

The circular wound core element 14 wound in the above-described manner is wound around the winding shaft 11 in a state in which a circular state is maintained with an adhesive tape or the like (not shown) attached to the outermost periphery thereof. Remove together with the frame 12. As shown in FIG. 2, the wound core body 14 removed from the winder is wound around the outer peripheral surface thereof with a plate thickness larger than that of the magnetic ribbon T, for example, a silicon steel strip slightly over one turn. The overlapping portion is temporarily fixed with an adhesive tape or the like to provide the outer reinforcing frame 16. On the other hand, after removing the winding frame 12 on the inner peripheral surface, as shown in FIG. 2 as well, the inner reinforcing frame 1 whose surface is substantially C-shaped using a silicon steel strip.
7 (the opening a is opposed to the position of the joint b of the wound core body 14), and the innermost reinforcing frame (the abutting portion c at the tip is the inner reinforcement 18 and 18 are respectively inserted and arranged to maintain the circular state of the wound core element body 14.

When the winding core body 14 is wound, the innermost and innermost reinforcing frames 1 are provided on the outer periphery of the winding frame 12.
The wound core element body 14 may be formed by attaching 7 and 18 in advance, winding the magnetic ribbon T, and forming the outer reinforcing frame 16 after winding.

Next, as shown in FIG. 3, the circular wound iron core element 14 is pressed simultaneously from the front / rear and left / right directions by a hydraulic press or the like through the molding plates 19 and 20 to form an oval shape. Transforms into. Then, as shown in FIG. 3, in a state in which the wound core element body 14 is pressed and held in an oval shape, at the position corresponding to the yoke portion of the wound core, the pair of molding dies 21 and 22 are
The recessed grooves 23 recessed in the dies 21 and 22 are inserted and arranged so as to face each other, and in this state, the lower end between the recessed grooves 23 and 23 is a taper-shaped die whose length dimension is slightly shorter than the upper end. While press-fitting the plates 24, 24 (see FIG. 4) between the recessed grooves 23, 23 by pressing, at the same time, the oblong-rolled core body 14 is further pressed by the forming plates 19, 20. As shown by, it is formed into a rectangular shape. After the wound core element body 14 is formed into a rectangular shape, the forming plates 19 and 20 are fixed to each other using tightening bolts (not shown), and the forming and holding frame 25 is formed by forming a rectangular frame as shown in FIG. Thus, even if the pressing of the forming plates 19 and 20 is released, the wound core element body 14 has a rectangular shape due to the pressing biasing force of the forming holding frame 25 and the forming plate 24 press-fitted between the forming dies 21 and 22. Can be held satisfactorily. Further, the outer reinforcing frame 16 forms one turn into a rectangular shape, the inner reinforcing frame 17 has a U shape, and the innermost reinforcing frame 18 has a rectangular shape within a range where one turn is not formed. It is molded and held in the same manner as the body 14. Instead of forming the forming and holding frame 25 using the forming plates 19 and 20, the wound core element body 14 may be formed into a rectangular shape and then fitted and held in a separately formed forming and holding frame.

Subsequently, as shown in FIG. 4, a heat-resistant electric wire is wound from one leg iron portion d of the wound core element body 14 over the forming and holding frame 25 to thereby excite the magnetic field annealing coil. 26, and then, the wound core body 14 is placed in an annealing furnace filled with an inert gas, and the exciting coil 2
A constant current is passed through 6 and magnetic field annealing is performed at a predetermined heating temperature. After the magnetic field annealing, as shown in FIG. 5, the exciting coil 26 is removed from the wound core element body 14, the forming holding frame 25 is disassembled, and the concave grooves 23 of the forming dies 21 and 22 are removed.
By removing the template 24 from 23 and removing it from the wound core element body 14 together with the molding dies 21 and 22, the rectangular core holding state of the wound core element body 14 is released, and the wound core 27 is formed. As described above, when the magnetic field annealing is performed, the wound iron core 27 is shaped so as to maintain the rectangular state, and the rectangular state is favorably maintained by the presence of the inner and outer reinforcing frames 16 to 18. Is possible (see FIG. 5).

Next, only the innermost reinforcing frame 18 formed into a rectangular shape is temporarily removed from the rectangular shaped wound iron core 27 within a range where one turn is not formed, and in this state, as shown in FIG. The second molding dies 28, 29 are arranged on the yoke portions e, f in the window of the wound iron core 27, and the plate-shaped template plate 30 is provided between the second molding dies 28, 29. The recessed groove 30a is used for press fitting to prevent the wound iron core 27 from losing its shape due to an external force. Second molding dies 28, 29 and template 30
After taking measures to prevent the winding iron core 27 from losing its shape,
As shown in FIG. 6, on both sides of the laminated end surface of the leg iron portion d of the wound iron core 27, for example, a room temperature curable adhesive is applied at a plurality of positions at predetermined intervals in the length direction of the leg iron portion d. Adhesive part 31
To form. After the adhesive portion 31 is formed, before the adhesive is hardened, the inner portion of the relatively thin insulating paper provided with the length dimension of the leg iron portion d and bent in a U shape in the width dimension is formed. The same adhesive as described above is applied, and this insulating paper is attached so as to cover the entire area of the leg iron portion d from the vertical direction of the laminated end surface of the leg iron portion d, as shown in FIG.

In the insulating paper, the adhesive applied to the insulating paper itself and the adhesive already applied to the laminated end surface side of the leg iron portion d are well adapted to each other, and the insulating paper is immovably attached to the leg iron portion d. be able to. In this manner, the leg iron portion d of the wound iron core 27 is damaged by the laminated end face of the leg iron portion d, and the magnetic ribbon which is fragile due to external impact, annealing, or annealing. The insulating reinforcing portion 32 is formed to prevent the insulating reinforcing portion 32 from peeling off. In addition, in order to prevent the insulation reinforcing portion 32 from peeling off from the leg iron portion d or from being displaced, if necessary, from the outside of the insulating paper attached to the leg iron portion d, the winding core 2
Adhesive tape 33 with a tightening force that does not stress 7
May be wound and adhered to form the insulating reinforcing portion. Further, instead of folding the insulating paper into a U-shape, after winding it about 1 to 2 times around the leg iron portion d, the adhesive tape is wound and adhered from the outer periphery of the insulating paper as described above. You may make it form an insulation reinforcement part. Further, the formation of the adhesive portion 31 on the leg iron portion d is for preventing the insulation reinforcing portion 32 from moving, and therefore, it is not necessary to provide the adhesive portion 31 on the entire leg iron portion d. After forming the insulation reinforcing portion 32 on the leg iron portion d, the second molding metal fittings 28, 29 and the template 30 are formed.
Is removed from the wound iron core 27 (see FIG. 7).

As described above, by forming the insulating reinforcing portion 32 on the leg iron portion d of the winding iron core 27, the leg iron portion d of the winding iron core 27 can prevent the laminated end surface from peeling off. Together with the presence of the inner and outer reinforcing frames 16 and 17, it is possible to strengthen the rigidity of the leg iron portion d itself. In such a state, the temporary fixing of the overlapping portion (the upper end surface of the upper yoke portion e of the winding core 27) of the outer reinforcing frame 16 is released. In this case, since the reinforcing frame 16 is annealed at the annealing temperature of the magnetic ribbon T which is about half the annealing temperature of itself,
Since the elastic force of the material itself remains, it can be easily released and expanded to a position substantially on the same line as the leg iron portion d of the wound iron core 27. On the other hand, in the wound iron core 27 around which the magnetic ribbon T is wound, the yoke portion e where the joint b is located is opened at the joint b. That is, the winding iron core 27 is shown in FIG.
As shown in FIGS. 9 and 10, the yoke portion e is opened so as to have a U-shaped planar shape until it reaches a position substantially on the same line as the leg iron portion d. In this case, the magnetic ribbon T constitutes the outer reinforcing frame 16, for example, since the plate thickness thereof is about 1/10 or less as compared with the silicon steel strip, almost no internal strain is generated in the wound iron core 27 itself. The outer reinforcing frame 16 can be easily expanded to the open position. Further, the opening work of the yoke portion e is performed by the insulating reinforcing portion 32 formed on the leg iron portion d of the winding iron core 27, the reinforcing frame 16 arranged on the outer peripheral surface of the winding iron core 27, and the U-shape arranged on the inner peripheral surface. -Shaped inner reinforcement frame 1
7, the winding iron core 27 is sufficiently rigid, so that when the yoke portion e is opened, the winding iron core 27 can be smoothly and satisfactorily opened into a U shape without being deformed by its own weight or deformed. can do.

On the other hand, as shown in FIGS. 9 and 10, the winding 34 incorporated in the winding iron core 27 is formed with one turn removed when the insulation reinforcing portion 32 is formed on the leg iron portion d of the winding iron core 27. The innermost reinforcing frame 18 formed in a rectangular shape in a range not to be fitted is fitted in the innermost side of the iron core insertion hole 35 in a rectangular shaped state as shown in FIG. In the above state, the wound iron core 27 opened in the U-shape is such that the open joint portion b of the yoke portion e faces the iron core insertion hole 35 of the winding wire 35 as shown in FIG. While one of the winding iron cores 27 approaches the other side, the yoke portion e provided with the joint portion b of the winding iron core 27 is fitted into the iron core insertion hole 35 of the winding wire 34. In this case, in the winding iron core 27, the leg reinforcing portion d is provided with the insulating reinforcing portion 32 that prevents the magnetic ribbon T from peeling off and also strengthens the rigidity, and furthermore, on the winding 34 side, in the iron core insertion hole 35. Coupled with the arrangement of the innermost reinforcing frame 18, for example, the winding 34 is pushed toward the winding core 27 side in FIG.
When the wire 34 is fitted into the coil 7, the innermost reinforcing frame 18 functions as a guide, and the coil 34 is the magnetic ribbon T of the winding iron core 27.
The reinforcing frame 18 does not come into contact with the insulating reinforcing portion 32.
It can be slidably contacted with and fitted into the wound iron core 27 from the yoke portion e to the leg iron portion d in almost one operation. Therefore, since the winding iron core 27 is provided with the insulating reinforcing portion 32 on the leg iron portion d upon the assembling of the winding wire 34, the winding iron core 27 is deformed by its own weight or the magnetic ribbon when the winding wire 34 is fitted. The T does not fall off, and the work of fitting the winding 34 can be performed quickly and easily (see FIG. 11).

The winding core 27 opened in the U-shape is shown in FIG.
As shown in FIG. 12, after the winding wire 34 is fitted, a space between the axial end portion of the winding wire 34 and the innermost reinforcing frame 18 is made of an insulating material, as shown in FIG. Spacers 36, 37
(The spacer 36 is thinner than 37.) Insert it, and then bend it from the innermost layer of the open core 27 of the yoke part e to the state (inside) before opening. As shown in FIG. 12, the open part g is re-bonded to each other to re-form the bonded part b. Then, the free end of the outer reinforcing frame 16 arranged on the outer periphery of the wound core 27 is superposed on the outer peripheral surface of the yoke portion e where the joint b is located, and this portion is fixed by spot welding or the like, As shown by 13 and 14, the winding 34 of the winding iron core 27
Finish the assembly work to. After fixing the overlapping portion of the outer reinforcing portion 16, a wedge 38 is fitted in the gap between the spacer 36 and the innermost reinforcing frame 18 to fix the winding 34 in the window of the winding core 34. Of course. When rejoining the joining portion b of the wound iron core 27, the leg iron portion d is firmly fixed and held by the insulating reinforcing frame 32 and the inner and outer reinforcing frames 16, 17 and 18, so that it is not deformed or displaced. The rejoining work can be performed accurately and without causing the fragments of the magnetic ribbon T without causing the above, and at the same time, the innermost reinforcing frame can be used when the wedge 38 is fitted. Since 18 is interposed, the impact at the time of fitting is alleviated and the joint b
Can be prevented from being adversely affected by the impact.

After the winding iron core 27 is assembled to the winding 34, as shown in FIG.
For example, a quick-drying adhesive is applied, and the end face coating paper 40 made of a thin insulating material shown in FIG. 17 is attached to the application surface 39, and the yoke portions e and f are set as shown in FIG. , The magnetic ribbon T from this part, which is completely shielded from the outside
Surely prevent the end face from peeling off. The end face coated paper 39 is shown in FIG.
As shown by 7, a tongue piece 40a is integrally provided on the lower end side so that it can be inserted into the gap between the winding wire 34 and the leg iron portion d of the winding iron core 27. The tongue piece 40a is inserted into the upper and lower edge portions of the insulation reinforcing portion 32 located in the winding 34 of the leg iron portion d so that the tongue piece 40a can be slid and then attached. As a result, the laminated end surface of the wound iron core 27 is completely covered with the insulating reinforcing portion 32 and the end surface covering paper 40, and the inner and outer peripheral surfaces of the wound iron core 27 are surrounded by the reinforcing frames 16 to 18. Therefore, the wound magnetic core 27 is not subjected to external force, vibration, or the like, and the magnetic ribbon T is not damaged or peeled off. In addition, even if debris is generated due to damage of the magnetic ribbon T, the outer surface of the wound iron core 27 has an end surface coated paper 40.
Since it is covered in a state in which it is completely shielded from the outside by means such as, etc., there is no possibility that debris will leak to the outside and adversely affect insulation or the like. Note that the end face coated paper 40 is coated with an adhesive at the time of sticking, and the coated surface 3 of the wound iron core 27 is
9 may be adhered, or the laminated end surface of the yoke portion e may be directly adhered with insulating paper or a fibrous insulator impregnated with a semi-cured resin without providing the coating surface 39. You may do it. As described above, the assembly of the wound iron core 27 is completed by sticking the end face coated paper 40 to the yoke portions e and f of the wound iron core 27.

Next, the wound iron core 2 constructed as described above.
A case of assembling a stationary induction electric device such as a wound iron core transformer shown in FIG. First, prior to assembly, as shown in FIG. 18, the laminated end surface of the wound iron core 27 (see FIG.
8) and the winding 34, an insulating spacer 41 for preventing the swinging of the winding 34 is inserted, and the winding core 2
A guide plate 42, which is slightly thicker than an insulating paper such as a press board and is vertically long, is inserted between the outside of the leg iron portion d of 7 (outside of the reinforcing frame 16) and the winding 34. 34, by further press-fitting a guide plate retainer 43 at the central portion in the width direction of the guide plate 42, the guide plate 42 is placed outside the leg iron portion d of the winding iron core 27 as shown in FIG. Stand upright. In addition, the vertically long guide plate 42 has a leg iron portion d.
When it is made to stand upright on the outer side, as shown in FIG. 16, it is formed with a length slightly protruding from the top of the end face covering plate 40. As described above, by erecting the guide plate 42, a gap 44 is formed between the guide plate 42 and the winding 34 on the side of the guide plate retainer 43 as shown in FIG. The work of mounting the guide plate 42 and the like is performed immediately after the assembly of the wound iron core 27 is completed.

As described above, the guide plate 42 is wound around the iron core 27.
After standing upright on the outer side of the leg iron portion d, the winding retainer 45 is applied on the outer peripheral side of the winding iron core 27 on the axial end face of the winding wire 34 as shown in FIG. A thick insulating plate 46, which is approximately the same height as the end face covering plate 40, is applied to the side while leaning against the end face covering plate 40 side, and in this state, the yoke portions e and f of the winding iron core 27 From the top and bottom
The upper clamp 47 and the lower clamp 48, which are wider than the width dimension of the winding core 27 and are formed into a U-shape, are loosely engaged with the corresponding yoke portions e and f of the winding core 27. in this case,
The height of the winding retainer 45 depends on each clamp 47,
When the tips of the bent pieces of 48 come into contact with the winding retainer 45, the bridging portions of the clamps 47 and 48 are dimensioned so as not to collide with the outer peripheral surfaces of the yoke portions e and f as shown in FIG. Since it is formed, the wound iron core 27 does not contact the upper and lower clamps 47 and 48, but is in a floating state.
Can be held loosely. As described above, after the upper and lower clamps 47 and 48 are loosely fitted to the winding iron core 27,
As shown in FIG. 19, a clamp tightening band 49 is inserted from the outside of the lower clamp 48 through a through hole (not shown) formed in the lower clamp 48, and a guide plate is formed in the space 44 outside the leg iron portion d of the winding core 27. 42, and vertically pass through the through hole (not shown) of the upper clamp 47 to wind the core 2
7 and the upper and lower clamps 47 and 48 are fixed to and supported by the winding iron core 27 via the winding retainer 45, whereby the stationary state is achieved. The assembly of the induction electric device 50 is completed.

As a result, the upper and lower clamps 47,
In the case of 48, the tightening force of the clamp tightening band 49 applies the tightening force in the vertical direction of the wound iron core 27.
Due to the structure in which the tightening force is not applied to the winding iron core 27 due to the presence of the winding retainer, no compressive force acts on the winding iron core 27 side, and the excellent magnetic properties of the magnetic ribbon T are effective. Can be held at. Moreover, the clamp tightening band 49 is not wound around the winding iron core 27,
Since it is only necessary to vertically arrange the lower clamps 47 and 48 along the guide plate 42, the upper and lower clamps 47 and 48 are provided.
The fastening work can be performed quickly and satisfactorily, and the productivity of the stationary induction electric device 50 such as this type of transformer can be significantly improved. In the case of a transformer having a relatively small capacity, the role of the winding retainer 45 (the point at which the upper and lower clamps 47 and 48 are held loosely without contact with the winding iron core 27) is performed by the insulating plate 46. Therefore, it goes without saying that a transformer without the winding retainer 45 may be manufactured.

[0030]

As described above, according to the present invention, when assembling a wound iron core used in a static induction electric device, a plurality of types of reinforcing frames are arranged on the outer peripheral surface of the wound iron core, and the laminated end surface side is A method is adopted in which the entire area from the leg iron portion to the yoke portion is covered with an insulating member, and the wound iron core is manufactured so that the fragments of the magnetic ribbon produced by shock or vibration due to external force do not leak to the outside. Therefore, it is possible to reliably eliminate the deterioration of the insulation of the transformer or the like caused by the fragments of the magnetic ribbons straying in the insulating oil. Also, when incorporating the winding core into the winding,
The leg iron portion of the winding iron core is provided with an insulating reinforcing portion, and further, on the winding side, a reinforcing frame located in the innermost layer of the winding iron core is provided in advance, and the winding iron core or the winding is provided. Even if it is inserted into the corresponding counterpart in one operation, only the insulating reinforcing portion and the reinforcing frame on the winding side are in sliding contact, and the winding core weakened by annealing does not make any contact with the winding. Since the magnetic core can be incorporated, it is possible to smoothly and satisfactorily assemble the wound core by eliminating the adverse effect that the magnetic ribbon is peeled off when the wound iron core is assembled and fragments are generated or chipped. Furthermore,
The insulation reinforcement part can be formed by partially applying adhesive to the laminated end surface of the leg iron part of the winding core and wrapping it in thin leaf insulating paper. It is possible to eliminate adverse effects and form quickly and easily. Furthermore, the present invention includes the insulation reinforcing portion,
The inner and outer circumferences of the winding core are thicker than the magnetic ribbon.
For example, since a reinforcing frame made of a silicon steel strip is formed, the wound iron core can be prevented from peeling off the magnetic ribbon and strengthening the rigidity in advance even when it is assembled in the winding or when the transformer is assembled. Therefore, it is possible to manufacture and provide a static induction electric device having a wound iron core excellent in magnetic characteristics by utilizing the characteristics of the magnetic ribbon without causing self-weight deformation or deformation. Further, since a reinforcing frame is provided on the inner and outer peripheral surfaces of the winding core, the impact generated when driving a wedge or the like when fixing the winding fitted to the winding core is mitigated by these reinforcing frames. Therefore, it is possible to prevent unnecessary stress from being applied to the magnetic ribbon. In particular, by interposing a plurality of rectangular reinforcing frames on the inner peripheral surface of the wound iron core in a range not forming a U-shape and one turn,
Since the opening and closing operations of the yoke portion during assembly of the winding core can be performed smoothly and smoothly, and when the winding is fixed in the window of the winding core, an effective stress relieving action can be achieved. As a result, quick and reliable assembly is possible without damaging the weakened winding core, and it is possible to further improve the productivity of this type winding core.

[Brief description of drawings]

FIG. 1 is a schematic view showing a winding state of an amorphous magnetic alloy ribbon.

FIG. 2 is a plan view of a wound core element body wound in a circular shape.

FIG. 3 is an explanatory diagram showing a process of forming a wound core element body.

FIG. 4 is an explanatory view showing a state where a wound core element body is rectangularly formed and an annealing treatment is performed.

FIG. 5 is a plan view of a wound iron core that is annealed and shaped into a rectangular shape.

FIG. 6 shows an essential part of a manufacturing method of the present invention, which is an explanatory view showing a process of forming an insulating reinforcing portion formed on a leg iron portion of a wound iron core.

FIG. 7 is a plan view of a wound iron core in which an insulation reinforcing portion is formed on a leg iron portion.

8 is a cross-sectional view taken along the line AA of FIG.

FIG. 9 is a perspective view showing a state in which a winding is inserted into a wound iron core opened in a U shape.

FIG. 10 is an explanatory diagram showing a case where a winding is incorporated in a wound iron core which is also opened in a U shape.

FIG. 11 is an explanatory diagram showing a state in which a winding is inserted into a wound iron core opened in a U shape.

FIG. 12 is an explanatory view showing the assembling process of the wound core.

FIG. 13 is an explanatory diagram showing a state in which a winding wire is incorporated in a winding iron core.

FIG. 14 is a perspective view showing a state where the wound core is completely assembled.

FIG. 15 is an explanatory diagram showing a state in which a laminated end surface of a yoke portion of a wound iron core incorporated in a winding wire is covered.

FIG. 16 is a plan view showing a wound iron core manufactured by the manufacturing method of the present invention.

FIG. 17 is a front view of the end face coated paper.

FIG. 18 is an explanatory diagram showing a fixed state of the wound core and the winding.

FIG. 19 is a front view of a static induction electric device assembled by using the wound iron core manufactured by the manufacturing method of the present invention.

FIG. 20 is a side view of the stationary induction electric device.

FIG. 21 is a perspective view showing an assembling process of a conventional wound core.

[Explanation of symbols]

 16 Inner Reinforcement Frame 17 Outer Reinforcement Frame 18 Innermost Reinforcement Frame 27 Winding Iron Core 32 Insulation Reinforcement Part 34 Winding 40 End Face Coated Paper b Joint Part d Leg Iron Part e Upper Yoke Part f Lower Yoke Part

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-58312 (JP, A) JP-A 61-40017 (JP, A) JP-A 59-172957 (JP, A)

Claims (3)

[Claims] 1. An amorphous magnetic alloy ribbon is wound a predetermined number of times,
Further, in a wound core of a static induction electric device having a joint such as a butt by cutting at least one portion thereof, the wound core is formed with a plate thickness thicker than an amorphous magnetic alloy ribbon on the outer peripheral surface thereof. The step of forming a rectangular shape with a plurality of types of reinforcing frames formed by increasing the plate thickness on the inner peripheral surface, the step of magnetic field annealing the rectangular formed wound iron core, and the magnetic field annealing. The step of temporarily removing only the reinforcing frame on the innermost peripheral surface of the wound iron core, the step of forming an insulating reinforcing portion on the leg iron portion of the wound iron core from which the reinforcing frame on the innermost peripheral surface is removed, and the joint portion The step of opening the yoke part side of the wound core having the above to open the wound core into a U-shape, and the leg frame part of the wound core opened in the U-shape has a built-in reinforcing frame of the removed innermost peripheral surface. In the state of assembling the winding, and rejoining the released yoke part, and further Method of manufacturing a static induction appliance, characterized in that a step of attaching an end face coated paper that covers it in laminated end surface of the yoke portion of the instrumentation was wound cores. 2. The insulation reinforcing portion of the leg iron portion of the wound iron core is formed by partially applying an adhesive to the laminated end surface of the leg iron portion, and then attaching an insulating member so as to wrap the adhesive on the leg iron portion. 2. The method for manufacturing a static induction electrical device according to claim 1, wherein 3. The wound iron core comprises a reinforcing frame surrounding the outer peripheral surface of the wound iron core, and a U-shaped reinforcing frame on the inner peripheral surface thereof and a reinforcing frame formed in a rectangular shape within a range where one turn is not formed. The method for manufacturing a static induction electric device according to claim 1, wherein the static induction electric device is manufactured.