JPH10223445A - Stationary inductive electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate gap from the abutting part of the cutting face at the leg part of respective wound cores by providing one yoke facing part of first or second core fastener with a core pushing protrusion and fastening respective wound cores while abutting the core pushing protrusion against the yoke part of wound core in the longitudinal center thereof. SOLUTION: The first yoke facing part 31 of a first core fastener 30 is provided with core pushing protrusion 39A, 39B abutting, respectively, against one yoke part Ya1 , Yb1 of wound cores 1A, 1B in the longitudinal center thereof. The first yoke facing part 31 of the first core fastener 30 faces the one yoke parts Ya1 , Yb1 of the wound cores 1A, 1B and the side plate parts 34, 35 are arranged along the laminate face of inner wound cores, respectively. The core pushing protrusion 39A, 39B provided at the yoke facing part 31 are then abutted respectively, against one yoke parts Ya1 , Yb1 of the wound cores 1A, 1B in the longitudinal center thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stationary induction electric device such as a transformer, a choke coil and a reactor.

[0002]

2. Description of the Related Art As an iron core used for stationary induction electric equipment such as a transformer, a choke coil, and a reactor, an outer iron core having a cut core structure formed by combining a plurality of rectangular wound iron cores is often used.

FIG. 8 shows an example of a conventional stationary induction electric device using this type of iron core. In FIG.
As shown in FIG. 9, an outer iron-shaped core for electric equipment configured by combining two rectangular cores 1 </ b> A and 1 </ b> B, a coil 2 is separately wound and wound around the electric equipment core 1, and 3 is a coil. This is an iron core tightening fitting for tightening the electric device core 1 from the outside.

The rectangular wound iron cores 1A and 1B are formed by winding a belt-shaped steel plate in a circular shape and forming a rectangular body into a rectangular shape and annealing it, or by winding a belt-shaped steel plate around a rectangular winding frame. It is manufactured by annealing a rectangular wound body. Each core is impregnated with a thermosetting resin, and the resin is heat-cured to solidify each core.

The wound iron core 1A has left and right legs Ca1 and Ca2 and a pair of yoke portions Ya1 and Ya2 provided so as to connect between corresponding ends of these legs. Part Ca
1, Ca2 is cut along a cutting line extending in a direction perpendicular to the longitudinal direction at the central portion in the longitudinal direction, and the first and second U-shaped core halves 1A1 and 1A2 (see FIG. 9). )
Is divided into two. Similarly, the wound iron core 1B has left and right legs Cb1 and Cb2 and a pair of yoke portions Yb1 and Yb2 provided to connect between corresponding ends of these legs. The portions Cb1 and Cb2 are cut along the cutting line extending in the direction perpendicular to the longitudinal direction at the central portion in the longitudinal direction, and are divided into two U-shaped first and second core halves 1B1 and 1B2. Have been. In FIGS. 8 and 9, J indicates a butt portion of a cut surface (cut surface) of a leg portion of each wound core.

[0006] The wound cores 1A and 1B, which are divided into first and second core halves to form a cut core structure, have their laminated surfaces S oriented in the same direction and their legs oriented in the same direction. The legs Ca2 and Cb1 of the adjacent pair constitute the coil winding legs of the electric device core 1, and the legs Ca1 and Cb2 located at both ends in the direction in which the cores are arranged side by side. Thus, the outer magnetic path forming legs of the iron core for the external iron-type electric device are formed. The coil 2 is wound around the legs Ca2 and Cb1 constituting the coil winding legs.

When assembling the stationary induction electric device, first, the first core half 1A1 of each of the wound cores 1A and 1B is used.
And 1B1 are inserted into the window of the coil 2. The adjacent legs of the respective second core halves 1A2 and 1B2 of the wound cores 1A and 1B are then inserted into the window of the coil 2 and the corresponding legs of the first and second core halves of each wound core. Assemble the iron core 1 by abutting the cut surfaces of.

Although not shown in the drawings, in order to adjust the magnetic permeability between the butted portions of the legs of each wound iron core to a proper value, a predetermined portion of the butted portions of the corresponding legs of the first and second core halves is attached. In some cases, a gap spacer having a thickness is inserted.

After the coil 2 has been fitted to the iron core 1 as described above, the iron core tightening fitting 3 is attached to the joint between the core halves 1A1 and 1A2 of the core 1A and the core 1
The stationary induction electrical device is completed by tightening the joint of the B core half 1B1 and 1B2.

The illustrated core clamp 3 is formed so as to extend in the direction in which the cores 1A and 1B are juxtaposed, and is opposed to the outer peripheral surface of one of the yoke parts Ya1 and Yb1 of the cores 1A and 1B. Outer magnetic path forming legs Ca1 and Cb2 of the first yoke opposing portion 31 and bent at right angles from both ends in the longitudinal direction of the first yoke opposing portion 31 to the same side.
A first core fastener 30 having a pair of arms 32, 32 extending along the outer peripheral surface of the pair and mounting plates 33, 33 bent outward at right angles from the respective ends of the pair of arms 32, 32. And a second yoke opposing portion 30 disposed opposite to the outer peripheral surface of the other yoke portions Ya2 and Yb2 of the wound iron cores 1A and 1B.
1 and a second core fastener 300 having a number 1.

Both ends of the first core fastener 30 in the width direction of the first yoke opposing portion 31 are bent at right angles from both ends in the width direction of the yoke opposing portion 31 to the lamination surface side of the wound core. A side plate portion 35 is formed at both ends in the width direction of the pair of arm portions 32, 32, which is bent at right angles from the both ends in the width direction of each arm portion to the lamination surface S side of the wound core. Is formed.
Also, the second yoke opposing portion 30 of the second core fastener 300
1 are formed at both ends in the width direction with side plate portions 302 bent at right angles from both ends in the width direction of the yoke opposing portion to the lamination surface side of the wound core.

Although not shown in detail in FIG. 8, a claw is formed at the tip of each of the arms 32, 32 of the first core fastener 30, and the claw is bent to form the second core fastener 300. By constraining both ends in the longitudinal direction, the first core fastener 30 and the second core fastener 300 are connected.

[0013]

As described above, in the conventional stationary induction electric apparatus constituted by combining a plurality of wound iron cores, the yoke facing portions of the core fasteners 30 and 300 constituting the iron core fastener 3. Since the whole of 31 and 301 was formed flat and the yoke opposing parts 31 and 301 and the yoke part of each core were in surface contact, the core was distorted or the core fastener was When there is distortion, as shown in FIG. 10, one core half of the wound core is tightened in a direction inclined to a plane OO that bisects the yoke of each core half. As a result, one half of the iron core may be inclined, and a gap G may be generated at the abutting portion J of the cut surface of the leg of the wound iron core. When such a gap G is generated, the generation of electromagnetic vibration of the iron core is promoted, and the noise (chattering noise) generated from the stationary induction electric device is increased, which is not only unfavorable but also reduces the magnetic permeability of the butted portion of the iron core. There is a possibility that the performance of the electric device may be degraded from the designed value.

SUMMARY OF THE INVENTION An object of the present invention is to provide a stationary induction electric device using an iron core having a plurality of cut-core-structured rectangular cores arranged side by side. Is to prevent the occurrence of

[0015]

According to the present invention, a stationary induction electric machine includes a plurality of rectangular wound iron cores each having a laminated surface oriented in the same direction and each leg oriented in the same direction. Adjacent legs of each of the adjacent cores are juxtaposed in a state as coil winding legs, and a pair of legs located at both ends of the plural cores in the juxtaposition direction are outer magnetic path forming legs. A core for an external iron-type electric device having a cut core structure in which each leg of each wound core is cut at an intermediate portion and each wound core is divided into two core halves; A coil wound around a coil winding leg of an iron core for a shaped electric device;
An iron core tightening bracket for tightening the iron core for electric equipment from the outside, wherein the iron core tightening bracket is formed so as to extend in the direction in which the plurality of winding cores are juxtaposed, and is provided on the outer peripheral surface of one yoke portion of the plurality of winding cores. A first core fastener having a first yoke opposing portion disposed oppositely, and a second yoke opposing portion disposed opposite to the outer peripheral surface of the other yoke portion of the plurality of wound cores. Both ends of the second yoke opposing portion are provided with a second core fastener coupled to both ends of the first yoke opposing portion.

In the present invention, at least one of the first yoke opposing portion and the second yoke opposing portion of the iron core tightening fitting is located at a position corresponding to the longitudinal center of the yoke portion of each wound core. An iron core pressing protrusion protruding toward the winding core side is provided, and the core pressing protrusion is configured to contact the outer peripheral surface of the yoke portion of each winding core.

As described above, at least one of the first and second core fasteners constituting the iron core fastening member is provided with the iron core pressing protrusion at the opposed portion of the yoke, and the iron core pressing protrusion is connected to the yoke portion of each winding core. When the cores are tightened in a state where they are in contact with the central part in the longitudinal direction of the core, even if the core fasteners and cores are distorted, the core half of each core extends the respective yoke in the longitudinal direction. Since it is correctly tightened in the butting direction along the plane bisecting the two, it is possible to prevent the occurrence of a gap in the butting portion of the cut surface of each wound core, thereby preventing the generation of noise. In addition, since it is possible to prevent a gap from being generated in the butt portion of the cut surface of each core, it is possible to eliminate the possibility that the magnetic permeability of the butt portion of the cut surface of each core deviates from a design value, thereby deteriorating the performance of the electric device. be able to.

In the present invention, an iron core pressing projection which abuts on a central portion in the longitudinal direction of one of the yoke portions of each winding core of the iron core tightening fitting is provided on the first yoke opposing portion, and the second yoke opposing portion is provided. The portion may be provided with a pair of core support protrusions that abut against the corner portions at both ends in the longitudinal direction of the other yoke portion of each core to support each core. The core supporting protrusions supporting the corners of the respective cores project obliquely from the second yoke opposing portion of the core tightening fittings, and are formed at the corners formed at both longitudinal ends of the other yoke of the respective cores. It is formed to circumscribe.

As described above, when the core supporting protrusions are provided to support the corner portion of the other yoke of each winding core, not only can each winding core be stably supported, but also each winding core is tightened. At this time, when a difference occurs in the tightening force acting on each pair of leg portions of each winding core, the core supporting protrusion is deformed by its elasticity to absorb the difference in the tightening force. Can be uniformly tightened.

Each of the core pressing projections provided on the opposed portion of the yoke of the iron core fastening metal extends parallel to the opposing surfaces of the pair of leg portions of the corresponding wound core, and extends the corresponding yoke portion of the wound core in the longitudinal direction by two.
It can be formed by a pair of tongues arranged symmetrically with respect to the plane of equal division. In this case, the pair of tongue pieces are formed by obliquely cutting and raising a part of the plate constituting the iron core clamp and projecting obliquely toward the longitudinal center of the yoke of the corresponding wound iron core. Then, each end is brought into contact with the outer peripheral surface of the central portion in the longitudinal direction of the yoke portion of the wound core.

As used herein, the term "stationary induction electric device" refers to an electric device including a core installed in a stationary state and a coil wound around the core. , Transformers, reactors and choke coils.

In the present invention, the "leg" of the iron core means a portion where the coil is wound or a magnetic path constituting portion arranged in parallel with the portion where the coil is wound among the respective portions of the iron core. . The term "yoke portion" means a portion provided to connect corresponding ends of left and right legs arranged in parallel. The "corner portions" formed at both ends of the yoke portion of the wound core are portions with a radius formed on the outer peripheral side of the boundary between both ends of the yoke portion and the pair of leg portions. means.

[0023]

FIG. 1 shows a stationary induction electric apparatus according to the present invention. In FIG. 1, the same parts as those of the conventional electric apparatus shown in FIG. Is attached. In FIG. 1, reference numeral 1 denotes a core for an electric device of an outer iron type configured by combining two rectangular wound cores 1 </ b> A and 1 </ b> B, 2 denotes a coil wound separately and wound around the electric device core 1, and 3 denotes an electric core. This is an iron core tightening fitting for tightening the device iron core 1 from the outside.

The rectangular wound cores 1A and 1B have the same construction as the conventional one shown in FIG. That is, the wound iron core 1A is a pair of yoke portions Ya1 provided so as to connect the left and right legs Ca1 and Ca2 and the corresponding ends of the legs.
And Ya2, and at the boundary between the longitudinal ends of the pair of yoke portions Ya1 and Ya2 and the left and right legs Ca1 and Ca2, a corner portion with an outer radius is formed. I have. The wound iron core 1A is impregnated with resin and hardened, and the left and right legs Ca1, Ca2 are cut along a cutting line extending in a direction perpendicular to the longitudinal direction at the center of each of the left and right legs. Are U-shaped first and second core halves 1
It is divided into two parts A1 and 1A2.

Similarly, the wound iron core 1B comprises left and right legs Cb1 and Cb2 and a pair of yoke portions Yb1 and Yb2 provided to connect between corresponding ends of these legs. At the boundary between the longitudinal ends of each of the yoke portions Yb1 and Yb2 and the left and right legs Cb1 and Cb2, a corner portion with an outer radius is formed. Left and right legs Cb1,
Cb2 is cut along a cutting line extending in a direction perpendicular to the longitudinal direction at a central portion of each longitudinal direction, and the wound core 1B is cut.
Are in U-shaped first and second core halves 1B1 and 1B2.
Has been split.

The wound iron cores 1A and 1B are arranged side by side with the respective laminated surfaces S oriented in the same direction and the respective legs oriented in the same direction, and the electrical equipment is formed by the pair of adjacent legs Ca2 and Cb1. The coil winding leg of the iron core 1 is configured. Further, legs Ca1 and Cb2 located at both ends of the cores 1A and 1B in the juxtaposition direction form legs for forming an outer magnetic path of the core for the shell-type electric device, and legs forming the coil winding legs. The coil 2 is wound around the portions Ca2 and Cb1.

The iron core clamp 3 is formed in a frame shape by a first core clamp 30 and a second core clamp 300. The first core fastener 30 is shown in FIG.
As shown in (A) and (B), the winding cores 1A and 1B are formed so as to extend long in the juxtaposed direction, and are arranged to face the outer peripheral surface of one of the yoke portions Ya1 and Yb1 of the winding cores 1A and 1B. The first yoke opposing portion 31 and the first yoke opposing portion 31
A pair of arms 32, 32, which are bent at right angles from both ends in the longitudinal direction to the same side and extend along the outer peripheral surfaces of the outer magnetic path forming legs Ca1 and Cb2 of the electric device iron core 1, and a pair of arms. 32,
Attachment plate portions 33, 33 bent outward at right angles from the respective ends of the respective ends 32, and side plate portions 34 bent at right angles to the lamination surface side of the wound core from both ends in the width direction of the first yoke opposing portion 31. 34, side plate portions 35, 35 bent at right angles from both ends in the width direction of the pair of arm portions 32, 32 to the lamination surface side of the respective wound cores, and are provided so as to protrude from the tip of each side plate portion 35. Notch for fitting an ear 304 formed at an end of a second core fastener 300 described later between each claw 36 and the arm 32. 37
Are formed. A mounting hole 38 is provided in each mounting plate 33.
Are formed.

The yoke facing portion 31 of the first core fastener 30
Has one yoke portion Y of each of the wound iron cores 1A and 1B.
Iron core pressing protrusions 39A and 39B are formed in contact with the central portions in the longitudinal direction of a1 and Yb1. As shown in FIG. 4, each iron core pressing projection is formed by stamping a part of the metal plate constituting the yoke opposing portion 31 toward the wound iron core.

The second core fastener 300 is shown in FIG.
As shown in (A) and (B), the winding cores 1A and 1B are formed so as to extend in the juxtaposed direction, and face the outer peripheral surfaces of the other yoke portions Ya2 and Yb2 of the winding cores 1A and 1B. A second yoke opposing portion 301 to be arranged and side plate portions 302, 302 bent at right angles from both ends in the width direction of the second yoke opposing portion 301 to the lamination surface side of the wound core are integrally provided. doing.
Both ends of the side plate portions 302, 302 are yoke opposing portions 3
01 is provided so as to terminate at a position before both ends in the longitudinal direction. The second yoke opposing portion 301 has a notch for fitting the claw portion 36 of the first core fastener 30 to the widthwise end of a portion protruding from both ends in the longitudinal direction of the side plate portions 302, 302. Notch 30
The end of the yoke opposing portion 301 adjacent to 3 is an ear 304 that fits into the notch 37 of the first core fastener 30.

The first core fastener 30 has its arms 32, 32 along the outer peripheral surfaces of the outer magnetic path forming legs Ca1, Cb2 of the cores 1A, 1B arranged side by side.
The first yoke opposing portion 31 is opposed to one of the yoke portions Ya1 and Yb1 of the wound iron cores 1A and 1B, and the respective side plate portions 34 and 3
5 are arranged along the lamination surface of the inner cores, and the core pressing protrusions 3 provided on the yoke opposing portion 31.
9A and 39B are respectively brought into contact with central portions in the longitudinal direction of one of the yoke portions Ya1 and Yb1 of the wound iron cores 1A and 1B.

The second core fastener 300 is disposed in a state where the second yoke opposing portion 301 faces the other yoke portions Ya2 and Yb2 of the cores 1A and 1B. In a state where the core fasteners are arranged, the claws 36 of the first core fastener 30 are fitted into the corresponding notches 303 provided in the second core fastener 300, and the second Ears 304 formed at the widthwise ends of both ends of the yoke opposing portion 301 of the core fastener 300 are fitted into the notches 37 of the first core fastener 30.

Then, with the first core fastener 30 urged toward the second core fastener 300, the claw 36 of the first core fastener 30 engages the yoke of the second core fastener 300. It is bent at a right angle along the outer surface of the facing portion 301 (the surface opposite to the cores 1A and 1B), whereby the first core fastener 30 and the second core fastener 300 are joined. The wound cores 1A and 1B are fastened in the butting directions of the respective core halves 1A1, 1A2 and 1B1, 1B2. In the state where the first core fastener 30 and the second core fastener 300 are thus connected, the outer surface of the yoke facing portion 301 of the second core fastener 300 is attached to the first core fastener 30. The depth of the notch 37 of the first core fastener 30 is set so as not to protrude outside the plate 33.

As described above, the yoke opposing portion 31 of the first core fastener 30 abuts on the outer peripheral surface of the central portion in the longitudinal direction of one of the yoke portions Ya1 and Yb1 of the cores 1A and 1B. When the iron core pressing projections 39A and 39B are provided so as to intensively apply a tightening force to the central portion in the longitudinal direction of one of the yoke portions Ya1 and Yb1 of the wound iron cores 1A and 1B, for example, as shown in FIG. Even if the yoke opposing portion 31 is disposed so as to be inclined with respect to the longitudinal direction of the yoke portion of the wound core due to the distortion of the first core fastener 30, the fastening provided from the first core fastener side. The force is applied to a plane O that bisects each yoke of the wound cores 1A and 1B in the longitudinal direction.
-O, the legs of both cores 1A and 1B can be evenly tightened, and cores 1A and 1B
It is possible to prevent a gap from occurring at the butted portion J of the cut surface of B.

In the above example, the iron core pressing projection is formed by punching. However, as shown in FIG. 6, for example, a pair of tongue pieces 31a formed by cutting and raising a part of the metal plate constituting the iron core clamp 3 is provided. , 31a, the core pressing protrusion 3
9A can also be configured. In the illustrated example, the tongue piece 31
a, 31a extend parallel to the opposing surfaces of the pair of legs Ca1 and Ca2 of the wound core 1A, and are symmetrical with respect to a plane OO which divides the corresponding yoke of the wound core 1A into two in the longitudinal direction. And is provided so as to project obliquely toward the center in the longitudinal direction of the yoke portion of the wound iron core 1A. In this case, the respective ends of the pair of tongue pieces 31a, 31a abut against the outer peripheral surface of the yoke portion Ya1 of the wound core to tighten the wound core 1A. An iron core pressing projection provided on the wound iron core 1B side can be formed in the same manner.

In each of the above examples, the first core fastener 30
Although the core pressing protrusion is provided only in the yoke facing portion 31 of
An iron core pressing projection which abuts on the yoke opposing portion 301 of the second core fastener 300 at a point contact or near point contact with the longitudinal center portion of the other yoke portions Ya2 and Yb2 of the cores 1A and 1B. May be provided, and the core pressing protrusions may be provided on both the yoke facing portion 31 of the first core fastener and the yoke facing portion 301 of the second core fastener.

As shown in FIG. 7, the yoke opposing portion 31 of the first core fastener 30 contacts the outer peripheral surface of one of the yoke portions Ya1 and Yb1 of the cores 1A and 1B in the longitudinal direction. Core contact pressing projections 39A and 39B are provided to be in contact with each other, and are formed on the yoke opposing portion 301 of the second core fastener 300 at both ends in the longitudinal direction of the other yoke portions Ya2 and Yb2 of the wound cores 1A and 1B, respectively. The core support projections 305, 305 that circumscribe the corners and support the corners may be provided. The illustrated core support protrusion 305 is provided with the yoke opposing portion 30.
1 is formed in a tongue-like shape by cutting and raising a part obliquely toward the corners at both ends in the longitudinal direction of the yoke portion of each wound core, and corresponds to both ends of the other yoke portion of each wound core. The corner portions are in contact with and supported by the corresponding core support protrusions 305.

Providing the core support projections as described above not only allows each core to be stably supported, but also causes a tightening force acting on each pair of legs of each core when each core is tightened. When a difference occurs between the cores, the core support protrusions 305, 305 are deformed by their elasticity to absorb the difference in the tightening force, so that the pair of leg portions of each wound core can be uniformly tightened.

In the above example, the first core fastener 30 is formed in a U-shape and the second core fastener is formed in a strip shape, but the iron core fastener 3 is basically formed as follows. It has a first yoke opposing portion 31 and a second yoke opposing portion 301, and the first yoke opposing portion 31 and the second yoke opposing portion 301 are provided.
And the first core fastener 3 may be configured so as to fasten the inner wound iron core by coupling
The overall shape of the zero and second core fastener 300 is arbitrary. For example, the second core fastener 300 side may be formed in a U-shape, and both the first core fastener 30 and the second core fastener 300 may be formed in a U-shape.

In the above example, two wound iron cores are provided. However, the present invention can be applied to a case where the iron core 1 for electric equipment is configured by arranging more wound iron cores.

[0040]

As described above, according to the present invention, an iron core pressing projection is provided on at least one of the first and second core fasteners constituting the iron core fastening metal, and the yoke opposing portion is provided. As we tried to tighten each winding core with the projection abutting the longitudinal center of the yoke part of each winding core,
Even if the core fasteners or cores are distorted, the core half of each core can be tightened correctly in the butting direction, preventing gaps from being formed at the butting part of the cut surfaces of the cores. , Noise can be prevented. In addition, since it is possible to prevent a gap from being generated in the butt portion of the cut surface of each core, it is possible to eliminate the possibility that the magnetic permeability of the butt portion of the cut surface of each core deviates from a design value, thereby deteriorating the performance of the electric device. be able to.

[Brief description of the drawings]

FIG. 1 is a front view showing a configuration example of a stationary induction electric device according to the present invention.

FIGS. 2A and 2B are a front view and a top view, respectively, of a first core fastener constituting the iron core fastener used in the stationary induction electric device of FIG. 1;

FIGS. 3A and 3B are a front view and a top view, respectively, of a second core fastener constituting the iron core fastener used in the stationary induction electric device of FIG. 1;

FIG. 4 is a cross-sectional view illustrating a structure for fastening a core in the stationary induction electric device according to the present invention.

FIG. 5 is a cross-sectional view showing a state in which a core fastener is inclined in the stationary induction electric device according to the present invention.

FIG. 6 is a cross-sectional view showing a main part of another configuration example of the stationary induction electric device according to the present invention.

FIG. 7 is a cross-sectional view illustrating a main part of still another configuration example of the stationary induction electric device according to the present invention.

FIG. 8 is a front view showing a configuration of a conventional stationary induction electric device.

FIG. 9 is a front view showing a configuration example of an electric device core used in a stationary induction electric device to which the present invention is applied.

FIG. 10 is a cross-sectional view showing a state in which a core fastener is inclined in a conventional stationary induction electric device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Iron core for static induction electrical equipment 1A, 1B Rectangular wound iron core Ca1, Ca2, Cb1, Cb2 Leg Ya1, Ya2, Yb2, Yb2 Yoke 1A1, 1A2 Half iron core of 1A2 iron core 1A 1B1, 1B2 of iron core 1B Iron core half 2 Coil 3 Iron core clamp 30 First core clamp 31 First yoke opposing portions 39A, 39B Iron core pressing protrusion 300 Second core clamp 301 Second yoke opposing portion S Laminated surface

Claims (3)

[Claims] 1. A plurality of rectangular wound cores are juxtaposed with their laminating surfaces oriented in the same direction and their legs oriented in the same direction. As a coil winding leg, and a pair of legs respectively positioned at both ends of the plurality of winding cores in the side-by-side direction are formed as outer magnetic path forming legs, and each leg of each winding core is formed. Is cut at an intermediate portion thereof, and each wound core is divided into two core halves, and the core for a core-type electric device having a cut core structure is wound around a coil winding leg of the core for the core-type electric device. And a core tightening bracket for tightening the electric device core from the outside. The core tightening bracket is formed so as to extend long in the direction in which the plurality of winding cores are juxtaposed, and the plurality of winding cores are provided. The first yoke opposing portion arranged opposite to the outer peripheral surface of one yoke portion A first core fastener having a second yoke opposing portion disposed opposite to an outer peripheral surface of the other yoke portion of the plurality of wound cores, and both ends of the second yoke opposing portion are provided. A stationary induction electric device comprising: a second core fastener coupled to both ends of the first yoke opposing portion; a first yoke opposing portion and a second yoke opposition of the core clamping metal. At least one of the portions has a core pressing protrusion protruding toward each winding core at a position corresponding to the central portion in the longitudinal direction of the yoke portion of each winding core, and the core pressing protrusion is provided on the yoke portion of each winding core. A stationary induction electric device which is in contact with an outer peripheral surface. 2. A plurality of rectangular wound cores are juxtaposed with their laminating surfaces oriented in the same direction and their legs oriented in the same direction. As a coil winding leg, and a pair of legs respectively positioned at both ends of the plurality of winding cores in the side-by-side direction are formed as outer magnetic path forming legs, and each leg of each winding core is formed. Is cut at an intermediate portion thereof, and each wound core is divided into two core halves, and the core for a core-type electric device having a cut core structure is wound around a coil winding leg of the core for the core-type electric device. And a core tightening bracket for tightening the electric device core from the outside, wherein the core tightening bracket is formed so as to extend long in the direction in which the plurality of cores are juxtaposed, and the plurality of cores are provided. The first yoke opposing portion arranged opposite to the outer peripheral surface of one yoke portion A first core fastener having a second yoke opposing portion disposed opposite to an outer peripheral surface of the other yoke portion of the plurality of wound cores, and both ends of the second yoke opposing portion are provided. In a stationary induction electric device comprising: a second core fastener coupled to both ends of the first yoke opposing portion, the first yoke opposing portion of the iron core clamp includes a first yoke opposing portion of each of the cores. At a position corresponding to the central portion in the longitudinal direction of the yoke, there is provided a core pressing protrusion protruding toward each winding core, and the core pressing protrusion is in contact with the outer peripheral surface of the yoke of each winding core, and the core tightening is performed. The second yoke opposing portion of the metal fitting has a core support protrusion obliquely projecting so as to circumscribe the corner portions formed at both ends in the longitudinal direction of the other yoke portion of each core. Core support projections corresponding to the corners formed at both ends in the longitudinal direction of the other yoke Stationary induction electrical apparatus, characterized in that abuts against and is supported. 3. Each core pressing protrusion extends in parallel with the opposing surface of the corresponding leg of the pair of wound cores, and is symmetrical with respect to a plane which bisects the corresponding yoke of the core in the longitudinal direction. And a pair of tongues that are obliquely protruded toward the central portion in the longitudinal direction of the yoke portion of the wound core, and the pair of tongues correspond to a part of a plate constituting the iron core tightening bracket. It is formed by cutting and raising it obliquely on the yoke part side of the wound iron core, and each end is abutted against the outer peripheral surface of the central part in the longitudinal direction of the yoke part of the wound iron core The stationary induction electrical device according to claim 1 or 2, wherein