JPH04103621U - wound iron core - Google Patents

Abstract

(57) [Summary] [Purpose] The purpose is to provide a wound core formed by winding an amorphous magnetic alloy ribbon, in which the inner and outer peripheral surfaces and laminated end surfaces are covered with an insulating material. [Structure] The inner and outer peripheral surfaces of the wound core 15 are reinforced with reinforcing frames 8d and 8e made of metal plates, and an insulating frame 8f using an insulating member.
8 g to strengthen the rigidity of the wound core 15,
A pair of U-shaped insulation protection plates 13 and 16 are attached to the laminated end faces of the wound core 15, and the outer surface of the wound core 15 is covered by the insulation frames 8f and 8g and the insulation protection plates 13 and 16. It is characterized in that it is coated in a box shape to strengthen the rigidity of the wound core 15 and prevent it from peeling off.

Description

[Detailed explanation of the idea]

0001 This invention is an improvement of a one-turn cut type wound core using amorphous magnetic alloy ribbon. Regarding.

0002

[Conventional technology]

In recent years, core materials have been used for wound cores used in stationary induction electrical equipment such as distribution transformers. Various studies have been conducted on the use of amorphous magnetic alloy ribbons (hereinafter simply referred to as magnetic ribbons). has been done. This magnetic ribbon is manufactured by ultra-quenching a molten magnetic alloy, which reduces iron loss. is extremely small and has excellent magnetic properties. and a winding made of the magnetic ribbon. When manufacturing distribution transformers using iron cores, connections made by continuously winding magnetic ribbons are used. An uncut wound core with no joints is often used. place However, with the above-mentioned uncut type wound core, the winding must be wound directly onto the core. Therefore, the winding work is time-consuming and takes up space inside the insulating cylinder inside the winding. In order to maintain a good core occupancy rate, the core cross section was made into a stepped structure with a nearly circular shape. This complicates the manufacturing process of the wound core. Furthermore, the winding itself is wound using a special jig. As the transformer was being rotated, its diameter inevitably increased, making the entire transformer larger and heavier. There was a problem of not only increasing the quantity but also increasing the manufacturing cost.

0003 On the other hand, a one-turn cutter is used in which magnetic thin strips cut after each turn are sequentially inserted into the winding. In some cases, a winding core of the winding method is used. This wound core is made of magnetic thin strip with each turn. The cut unit cores are combined into multiple pieces (number + pieces) to form a unit laminated core, and this unit The laminated core is further laminated in multiple layers to form a unit laminated block (hereinafter simply referred to as a laminated block). to be called. ), and when assembling the wound core, the laminated blocks are wound and made into a single piece. The two ends of the laminated core are sequentially shifted in a stepwise manner and joined by butting or overlapping. This laminated block was further laminated by the required number of layers in the same manner as above to obtain a predetermined lamination thickness. It consisted of a one-turn cut type wound core. The wound core laminated as described above has its joints such as butts on one side of the yoke. After positioning and forming into a rectangular shape, magnetic field annealing is performed. After the annealing, the wound core is Open the joint of the yoke for each layer block, and place each layer block inside the winding core. The core is assembled by inserting the parts into the windings one after the other, and then the above-mentioned joining is performed again. The core assembly was completed by joining the parts.

0004

[Problem that the idea aims to solve]

However, when manufacturing the above-mentioned one-turn cut type wound core using magnetic ribbon, There were the following problems. (1) Magnetic ribbons have poor rigidity and become extremely brittle due to annealing. Therefore, the laminated blocks of the winding core made of magnetic thin strips are disassembled into individual blocks and wound. When assembling into a wire, it is difficult to maintain the rectangular shape, and the shape may change due to its own weight. Be very careful when assembling as the shape may adversely affect the magnetic properties. There was a problem in that manufacturing the wound iron core required time and effort. (2) Also, each laminated block of the wound core has become extremely brittle due to annealing. However, even if you take great care when assembling the winding core, it may collide with the winding or the winding may already be in contact with the winding. If it hits the inserted laminated block, it will easily break and create fragments. If the oil remains in the core insertion hole of the winding, the convection of the insulating oil may occur during transformer operation. They can float around and enter between the layers of the windings, causing short-circuit accidents in the windings. There was a problem. (3) Furthermore, magnetic ribbons are manufactured to be extremely thin, and their rigidity can be improved by annealing. Since the structure is weak, when each laminated block is assembled into a winding in sequence, it becomes extremely self-sustaining. In many cases, the wires are not properly connected to the windings, and the A jig, etc. is used to insert the previous layer of laminated blocks until the next layer of laminated blocks are inserted. It was necessary to make it independent by using Therefore, the assembly efficiency of the wound core is very poor. This was a major factor hindering the mass production of seed-wound cores. This invention solves the above problems and strengthens the rigidity of the magnetic ribbon during core assembly. In addition to providing independence as a material, it also reliably prevents fragments from occurring due to defects, etc. The purpose is to provide a wound core that improves core characteristics and productivity. do.

[0005]

[Means to solve the problem]

This invention involves winding a magnetic ribbon using a one-turn cut method and forming it into a rectangular shape. For example, on the inner and outer circumferential surfaces of the wound iron core, the width is the same as the iron core width, and the type of magnetic ribbon is different from that of the magnetic ribbon. For example, a rectangular reinforcing frame made of silicon steel strip is connected at one point around the circumference to the protrusion of the wound iron core. Cut and arrange the yoke in the width direction at the position of the yoke having the mating joint, and in this state, After annealing the wound core, the inner and outer circumferential surfaces of the wound core have a width dimension that is greater than the width of the core. An insulating strip made of relatively strong pressboard, etc., which has been made slightly longer, is stretched along its width. Stress is applied to the wound core with the opposite end protruding laterally from the laminated end face of the wound core. In this state, the coils are wound to form a pair of insulating frames in such a way that they are not exposed to Insulating material processed into a U-shape from the yoke on the lower side of the wound core to the upper part of the core legs. A lower insulating protection plate is disposed on the laminated end surface of the wound core. Continuing, the above-mentioned wound iron core Using the joint part, move the yoke side that has the joint part forward in the same line as the leg iron part. Open the rolled iron core so that its planar shape is U-shaped, and insert the legs from the opened yoke side. After inserting the iron part into the core insertion hole of the winding, when the open yoke part side is reconnected, In both cases, the laminated end face of the yoke at the top of the core that has been rejoined is exposed to the outside. In the same way as above, an upper insulating protection plate processed into a U-shape is arranged, and the iron core part is The wound core is configured so that it is not exposed to the outside using an insulating frame and an insulating protection plate. It is characterized by having sea urchins.

[0006]

[Effect]

According to the wound core of the present invention, the inner and outer peripheral surfaces of the wound core are made of metal plates different from the magnetic ribbon. A reinforcing frame formed by An insulating frame consisting of a A pair of insulating protection plates are arranged in a state where they are fitted to the insulating frames arranged on the inner and outer peripheral surfaces. The rigidity of the wound core itself is strengthened by the metal reinforcing frame. Coupled with the fact that In addition, a pair of U-shaped insulators are placed on the laminated end face of the wound core. Since the protective plate covers the laminated end face so as not to expose it to the outside, it will not become brittle due to annealing. The magnetic thin strip that has become It is possible to reliably prevent flaking due to excitation vibrations, etc. that occur during operation. Ru. Moreover, even if a piece of the magnetic ribbon is generated due to a breakage, etc., the entire outer surface of the wound core will be covered. A pair of upper and lower insulation protection plates whose bodies are U-shaped, and insulation plates arranged on the inner and outer peripheral surfaces of the wound core. By enclosing the debris within the wound core, Since it is constructed to prevent scattering, it eliminates the harmful effects caused by debris and protects the iron core. A wound core with excellent properties can be obtained. Moreover, as mentioned above, the wound core is self-supporting. The wound core is Assembly can be carried out smoothly and well, and productivity of this type of wound core can be significantly improved. Wear.

[0007]

【Example】

Examples of the present invention will be described below with reference to FIGS. 1 to 15. An example implemented on an iron core will be explained. In FIG. 2, an amorphous magnetic alloy ribbon 1 is continuously wound around a circular winding frame 2 a predetermined number of times. Then, a circular layered body 3 is formed. Next, as shown in Fig. 3, from the winding layer body 3 to the winding frame 2 is removed, a part of this rolled layered body 3 is tightened and fixed with tightening plates 4, 4 and bolts 5, In this state, the clamping plates 4, 4 and the winding layer 3 are cut along the cutting line 6 using a cutting device (not shown). Cut it. Next, remove one of the two divided clamping plates 4, 4 from the rolled layer 3. As shown in Figure 4, unfold the cut rolled layered body 3 in a straight line, and remove the top and bottom layers. A metal plate, for example, a silicon steel strip, having the same width as the rolled layered body 3 is arranged to form the rolled layered body 7. Form. One cut surface of the expanded laminate 7 that is restrained by the clamping plates 4, 4 is The other cut is perpendicular to the length direction of the layer 7 and is a free end. The cross section is inclined with respect to the length direction of the expanded laminate 7, so that the lengths are arranged in order. A large number of amorphous magnetic alloy ribbons (hereinafter simply referred to as magnetic ribbons) 1 that increase in size are Laminated in a straight line. Then, as shown in FIG. 5 from the state of FIG. 4, Divide the magnetic thin strip 1 into multiple sets, and each set in the length direction of a predetermined dimension. As a result, a large number of magnetic thin strips 1 are stacked, and both ends are shifted in a step-like manner. A laminated block 8 is formed. The laminated block 8 has a wound core to be formed. Constructs unit laminated blocks 8a, 8b, and 8c divided into a plurality of units in the radial direction at predetermined thicknesses. As shown in Figure 5, dimensions are determined for each layer of the wound core according to its circumference and thickness. A plurality of sets of the unit laminated blocks 8a, 8b, 8c are formed.

[0008] Next, when forming the laminated block 8 into a rectangle, divide it into two as shown in FIG. The unit laminated blocks 8a, 8b, 8c are placed along the outer periphery of the rectangular molding die 9. , overlap each other sequentially starting from the inner part of the wound core, and press the pressing plates 10 from all sides. By pressing with a press, the unit laminated blocks 8a, 8b, 8c are shaped into rectangles. Molded into a shape. At this time, the silicon placed on the top and bottom layers of the laminated block 8 The steel strip is formed into a rectangular shape similar to the laminated block 8, as shown in FIGS. 6 and 14. The inner peripheral surface of the laminated block 8 has an inner reinforcing frame 8d whose free ends abut against each other, and the outer peripheral surface An outer reinforcing frame 8e is formed with the free ends overlapped on each other. and , the overlapping portions of the outer reinforcing frame 8e are temporarily fixed using tape or the like (not shown). I'll try it. The laminated block 8 has a pair of reinforcing frames 8d and 8e on its inner and outer peripheral surfaces. In this state, an excitation coil (not shown) is wound and placed in an annealing furnace, and the excitation coil is Strain relief annealing is performed at a predetermined temperature while energizing. When the above annealing is performed, the laminated block Since the hook 8 is shaped like a rectangle, in this state, it is attached to the inner peripheral side of the inner reinforcing frame 8d. is a rectangular shape of an insulating strip such as a press board within a range that does not form one turn slightly. The outer reinforcing frame 8e is formed with an insulating strip plate on the outside of the reinforcing frame 8e. By overlapping the free ends within a range that slightly forms one turn and then wrapping and fixing them. Inner and outer insulating frames 8f and 8g are provided, respectively. the insulating frame 8f, 8g is determined from the width dimension of the laminated block 8 (vertical direction in FIG. 15) as shown in FIG. It has a slightly long dimension and slightly protrudes outward from the stacked end face of the stacked block 8. It is formed by Next, on the stacked end face of the rectangularly shaped stacked block 8, , from the yoke part 12b side that does not have the joint part 11 to the leg part 12c in FIG. As shown in Figure 12, the bottom is made of mylar paper, insulating paper, etc. formed into a U-shape. The side insulation protection plate 13 is attached in a state where it is fitted between the insulation frames 8f and 8g. Alternatively, place them in close contact with each other by attaching them with tape or the like to prevent them from peeling off. this place In this case, the lower insulating protection plate 13 has its upper edge aligned in the axial direction of the winding 14, as shown in FIG. It is formed with a length that protrudes upward to some extent from the end surface, making it easy to attach. Then, leave the upper end portion and attach it to the yoke portion 12b and leg iron portion 12c.

[0009] As mentioned above, a pair of insulating frames are provided on the inner and outer peripheral surfaces of the laminated block 8 formed into a rectangular shape. A yoke part 12a in which the bodies 8f and 8g are arranged and has a joint part 11 on the laminated end surface side. After pasting and arranging the U-shaped lower insulating protection plate 13 except for the sides, as shown in FIG. In this way, the yoke 12a side of the laminated block 8 having the joint 11 is connected to each unit laminated block. Each block 8a, 8b, 8c is opened at the joint 11 as shown in FIG. Form the hook 8 into a U-shape. In this case, it is formed on the outer peripheral surface side of the laminated block 8. Each overlapping portion of the reinforcing frame 8e and the insulating frame 8g is formed by forming the laminated block 8 into the U-shape In addition to disassociating in advance at the time of opening to the Due to the presence of the reinforcing frames 8d, 8e and the insulating frames 8f, 8g arranged on the outer peripheral surface, Since the rigidity is sufficiently maintained, the yoke portion 12a will not lose its shape or deform under its own weight when opened. Opening work can be carried out smoothly without causing any problems. The U-shaped open stacked block 8 is constructed using the open yoke 12a. As shown in FIG. 9, insert the leg iron part 12c into the iron core insertion hole of the winding 14, and Insert and hold in the heart insertion hole. When inserting the leg iron part 12c, the laminated block 8 is On the inner and outer peripheral surfaces and the laminated end surface from the lower yoke part 12b side to the upper part of the leg iron part 12c. The iron core part is As a result, the laminated block 8 has increased rigidity. It is possible to insert the core into the core insertion hole of the winding 14 in a single motion while maintaining excellent self-reliance. Moreover, since the iron core part of the leg iron part 12c is not exposed to the outside, it is easy to insert it. Even if an external force is applied to the magnetic ribbon 1 during the installation work, the insulating frame 8 In addition, the iron core part can be protected by inner and outer insulating frames 8f, 8g, etc. Because it is in a floating state due to the presence of the wire, direct sliding contact with the winding 14 is completely avoided. Therefore, when inserting the laminated block 8 into the winding 14, the magnetic ribbon 1 To reliably prevent peeling or damage due to sliding contact or collision with the winding 14, etc. I can do that.

0010 After inserting the laminated block 8 into the winding 14, the axial end face of the winding 14 and the laminated block Insert the insulating spacer 15 of a predetermined thickness into the space between it and the lock 8, and then As shown, an open insulating frame 8f, a reinforcing frame 8d, and a unit laminate located at the innermost layer. Bend the blocks 8c in order to the state before opening (inside) and connect the joint 11 to the closest position. match. As described above, the unit laminated blocks 8a, 8b, 8c are sequentially changed to the state before opening. As shown in Fig. 10, the joint 11 is rejoined and the laminated block 8 is reattached. After forming the rectangular shape, the overlapping portion of the outer reinforcing frame 8e is welded, for example, by spot welding. 8g of the outer insulating frame is attached to the laminated block by gluing the overlapping part. As shown in FIG. This is for assembling the core 15 to the winding 14. The unit laminated blocks 8a to 8c The rejoining work can be done accurately and quickly because the wound core 15 itself has been reinforced with rigidity. It can be done quickly and easily. Next, on the wound core 15 assembled as described above, As shown in FIG. 12, the laminated end face of the yoke part 12a is A U-shaped upper insulating protection plate 16 with a short length for protecting the laminated end face is arranged. to ensure that the laminated end face of the wound core 15 directly exposed to the outside is covered. The upper insulation When arranging the protection plate 16, for example, the surface corresponding to the laminated end surface of the protection plate 16 is In this state, as shown in Figure 11, the lower free end side has already been pasted. While inserting it inside the upper edge of the lower insulating protection plate 13 attached, insert the inner and outer insulating frames. It is fitted between 8f and 8g and attached to the laminated end face of the yoke portion 12a. In addition, the above The upper edge of the lower insulating protection plate 13 is located above the lower edge of the upper insulating protection plate 16 after it is attached. Glue or the like and arrange as shown in FIG. 11. In this way, the laminated layers are opened in a U-shape. The wound core 15 assembled by inserting the block 8 into the winding 14 and rejoining the joint 11 Insulating frames 8f and 8g are arranged on the outer peripheral surface, and a pair of upper and lower U-shaped insulation protection plates 13 and 16 are arranged, that is, on the inner, outer peripheral surface and front of the wound core 15. , the assembly of the wound core 15 is completed by completely covering the rear end surface with the insulating member. It is to be completed.

[0011] In addition, the upper and lower pair of insulating protection plates 13 and 16 are inserted into the winding iron by inserting their free ends. Instead of adhering to the laminated end face of the core 15, the free ends are joined and adhered to each other. Alternatively, the insulation protection plates 13 and 16 may be attached to the wound core 15 using an adhesive. Instead, attach it to the wound core 15 by wrapping adhesive tape or the like around the insulating frames 8f and 8g. Even if it is attached, the present invention will still work.

0012

[Effect of the idea]

Since the present invention is configured as explained above, it has the following effects. do. (1) When assembling the wound iron core by inserting it into the iron core insertion hole of the winding wire, the present invention Double rigidity is achieved by a metal reinforcing frame and an insulating insulating frame on the inner and outer peripheral surfaces of the core. Since the core is reinforced, it is possible to obtain a wound core with excellent self-reliance. The insertion work into the winding can be done in one motion without damaging the magnetic ribbon due to deformation etc. The production process can be carried out smoothly and well, and the productivity of this seed-wound core can be significantly improved. Ru. (2) Also, a pair of insulating protection plates formed in a U shape are arranged on the laminated end face side of the wound core. Since the core is placed in the When standing, it is important to avoid applying external force to the laminated end face, which has become brittle due to annealing. It reliably prevents the magnetic ribbon from peeling off due to mechanical vibrations that occur during transport. , it becomes possible to obtain a wound core with excellent core properties. (3) Furthermore, the present invention provides an insulating frame and an insulating protection plate for the outer surface of the wound core. Since it is coated to form a box, it should not become magnetic due to impact force, etc. Even if the ribbon is damaged, the fragments caused by this damage will not be scattered outside. Since there is no debris, it is possible to reliably avoid the harmful effects caused by the generation of debris. Wear. (4) Also, the upper and lower insulation protection plates forming a pair of U-shapes are When assembling the core, the lower insulation protection plate is attached after annealing the core. The upper insulation protection plate prevents the end face of the leg iron from peeling off, while the upper insulation protection plate In order to open the yoke part that has a It is designed so that only this part can be easily covered when it is reclosed. By attaching a pair of upper and lower insulation protection plates to the laminated end face of the wound core, magnetic ribbon It is possible to prevent the peeling of the By doing so, it can be done quickly and reliably. (5) Furthermore, the insulating frame wrapped and fixed on the inner and outer peripheral surfaces of the wound iron core is a laminated layer of the wound iron core. Since it protrudes slightly from the end surface side, a pair of insulators can be placed between the inner and outer insulating frames. Coupled with attaching the guard plate to the laminated end face of the core, the outer surface of the core is shaped like a box. Not only can it be easily covered, but it also prevents the corners of the wound core from being directly exposed to the outside. This prevents damage caused by external force when assembling the core, and also prevents damage to the core when assembling the core. When moving the core, there is no need to touch the sharp corners directly. can be handled safely.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the wound core of the present invention during assembly.

FIG. 2 is an explanatory diagram showing a winding state of an amorphous magnetic alloy ribbon.

FIG. 3 is an explanatory diagram showing a state in which the wound layered body is cut.

FIG. 4 is an explanatory diagram of a developed laminate showing a state in which the rolled laminate is developed into a linear shape.

FIG. 5 is an explanatory diagram showing a state in which the developed laminate is divided into unit laminate blocks.

FIG. 6 is an explanatory diagram showing a rectangular shaped state of the expanded laminate.

FIG. 7 is an explanatory diagram showing a state in which the laminated block is opened in a U-shape.

FIG. 8 is an explanatory diagram showing a state in which the laminated block is inserted into the winding wire.

FIG. 9 is an explanatory diagram illustrating the process of reassembling the wound core.

FIG. 10 is an explanatory diagram for explaining a state in which the laminated end face of the wound core is protected.

FIG. 11 is a vertical cross-section showing an enlarged main part of the wound core.

FIG. 12 is a plan view of the insulation protection plate.

FIG. 13 is a front view showing a state in which the wound core is assembled to the winding wire.

14 is a cross-sectional view taken along line AA in FIG. 6. FIG.

15 is a sectional view taken along line BB in FIG. 8. FIG.

[Explanation of symbols]

1 Amorphous magnetic alloy ribbon 8d Inner reinforcement frame 8e Outer reinforcement frame 8f Inner insulation frame 8g outer insulation frame 13 Lower insulation protection plate 14 Winding wire 15 winding core 16 Upper insulation protection plate

──────────────────────────────────────────────── ─── Continuation of front page (72) Inventor: Tetsunari Ido Aichi Electric Co., Ltd., 1 Aichi-cho, Kasugai City, Aichi Prefecture Inside the ceremony company

Claims (3)

[Scope of utility model registration request] 1. A wound core formed by winding an amorphous magnetic alloy ribbon in a one-turn cut method, wherein a pair of reinforcing frames made of metal plates are provided on the inner and outer peripheral surfaces of the wound core,
A pair of insulating frames made of an insulating material are arranged, and an insulating protection plate formed in accordance with the shape of the laminated end face is arranged on the laminated end face side of the wound core so that the core part is not exposed to the outside. A wound iron core characterized in that it is configured as follows. 2. The insulating frame disposed on the inner and outer peripheral surface of the wound core is arranged such that both ends thereof in the width direction protrude laterally from the laminated end surface of the wound core. Wound core as described. 3. The insulating protection plates disposed on the laminated end faces of the wound core are formed of a pair of insulating members in a U-shape, and the length of the lower protection plate is equivalent to that of the upper protection plate. The wound iron core according to claim 1, characterized in that it is provided in a lengthened manner.