JP2013008808A - Power transformer and manufacturing method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method of solving the problem that, when a power transformer is assembled of an iron core formed by stacking large-capacity coils and magnetic materials, the coils' own weights and the iron core's own weight work on the coils' outer sheathing.SOLUTION: In a power transformer, the upper part of an iron core is supported by a first upper iron core supporting part disposed on a first end face side on the upper part of the iron core and in the stacking direction of thin belts of magnetic materials and a second upper iron core supporting part disposed on a second end face side opposite to the first end face side; the first upper iron core supporting part and the second upper iron core supporting part are so shaped as to extend lengthwise in a direction substantially orthogonal to the widthwise direction of the thin belts of magnetic materials of the iron core; the iron core is arranged between these supporting parts; projections are disposed in mutually approaching directions from the first upper iron core supporting part and the second upper iron core supporting part; a bridging member is provided over the projection of the first upper iron core supporting part and the projection of the second upper iron core supporting part; and the bridging member supports the iron core.

Description

  The present invention relates to a technique for providing a transformer using an iron core on which magnetic materials are laminated.

Conventionally, for example, Patent Document 1 discloses an amorphous transformer.
In Patent Document 1, the effect of the invention is that “the amorphous wound core itself is self-supporting without being subjected to the load of the amorphous wound core, and the wrap molding operation is not dependent on the finished shape of the coil. It is possible to improve the iron core characteristics and to improve the insulation workability between the iron core and the coil. "

JP2006-120879

  Conventionally, for example, in an amorphous transformer, a current assembling method is that a winding is laid sideways, an iron core is inserted, wrapped, a metal fitting is attached, and then a stand is raised again to produce a transformer.

  However, with the increase in transformer capacity, the conventional method increases the weight of the winding, which causes the entire load of the winding and the amorphous iron core to be applied to the contact surface of the winding exterior when reversed. May cause damage to the winding insulation and should be noted.

  In addition, since the weight of the iron core becomes heavier as the capacity increases, the conventional method of receiving the weight of the amorphous iron core at the end face of the winding after raising the iron core adds the weight of the amorphous iron core to the end face of the winding, and the winding is performed in the same manner as described above. There is a risk of damaging the wire insulation, so care must be taken.

  Damage to the winding insulation is expected to cause a reduction in the mechanical strength and reliability of the winding. Therefore, for example, in a large-capacity amorphous iron core transformer, when combining the winding and the amorphous iron core, it is necessary to consider preventing the winding from being loaded more than necessary. I can say that.

  In order to solve the above-mentioned problems, the present invention solves the problem by adopting a method of assembling a winding of a transformer having an iron core laminated with a magnetic material, without standing the iron core. Thus, it can be improved as compared with the prior art.

  The above means will be described below in other expressions.

  A transformer having an iron core and a winding formed by laminating a plurality of thin ribbons of magnetic material, and provided on the first end surface side in the laminating direction of the thin ribbon of magnetic material above the iron core The upper part of the iron core is supported by the first upper iron core support part and the second upper iron core support part provided on the second end face side opposite to the first end face side, and at the lower part of the iron core. A first lower iron core support portion provided on the first end surface side in the laminating direction of the thin ribbon of magnetic material, and a second lower portion provided on the second end surface side opposite to the first end surface side. The lower portion of the iron core is supported by the iron core support portion, and the iron core is assembled in an upright state, and the first insulation is formed on the first lower iron core support portion and the second lower iron core support portion. A member is provided, the winding is disposed on the first insulating member, and a second insulation is disposed on the winding. Members are provided, and the first upper iron core support portion and the second upper iron core support portion are arranged in a direction approaching each other and at a position corresponding to the second insulating member. A bridging member is provided on the protrusion of the first upper core support and the protrusion of the second upper core support, and the lower part of the annular core is opened and upright. The iron core is inserted from above into the winding, and the iron core is supported by the transfer member, and after the insertion, the lower portion of the iron core is closed so as to have an annular shape.

  ADVANTAGE OF THE INVENTION According to this invention, the reliability improved more than before and the manufacturing method of a transformer can be provided.

The content assembly drawing of the Example regarding this invention is demonstrated. The contents assembly drawing before the amorphous iron core insertion of the Example regarding this invention is demonstrated. An exploded view of an assembly according to an embodiment of the present invention will be described. The insertion of the amorphous iron core according to the embodiment of the present invention will be described.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 illustrates an assembly drawing in the embodiment.

  FIG. 2 illustrates a winding structure before inserting the amorphous iron core in the embodiment.

  FIG. 3 is an exploded view of the assembly in the embodiment.

  In the explanatory view of the embodiment shown in FIG. 3, the transformer of this embodiment includes two lower iron core fasteners (1, 2) (or a first lower iron core support portion and a second lower iron core support portion). , Stud (3, 4) (or fixing member) for fixing two lower iron core fasteners, lower insulating wall (5, 6, 7, 8) (or first insulating member), winding ( 9, 10, 11), upper insulating wall (12, 13, 14, 15) (or second insulating member), two upper iron core fasteners (16, 17) (or first upper iron core) Support portion, second upper core support portion), studs (18, 19) (or fixing members) for fixing the two upper core fasteners, and studs (20, 21, 22) for fixing the upper and lower core fasteners. , 23, 24, 25, 26, 27) (or fixing member), insulating plate (28, 29, 30, 31) (or hand The member) is constructed.

  Here, the manufacturing method of the transformer of a present Example is demonstrated.

  First, two iron core fasteners (1, 2) are arranged in parallel so as to face each other. Then, the studs (3, 4) are passed through the two iron core fasteners and tightened with nuts to fix the positions of the two lower iron core fasteners.

  An insulating wall (5, 6, 7, 8) is placed on the two fixed iron core fasteners to insulate the winding from the iron core fastener. On top of that, the windings (9, 10, 11) are placed in an upright state.

  An insulating wall (12, 13, 14, 15) is placed on the end face of the upper part of the winding to electrically insulate the winding from the iron core fastener, and two upper iron core fasteners (16, 17) are provided thereon. Arrange in parallel to face each other.

  The upper iron core fastener has hooks (16-1, 16-2, 16-3, 16-4, 17-1, 17- so as to be on the insulating wall or correspond to the insulating wall. 2, 17-3, 17-4).

  The hook is fixed to the upper core fastener by welding or the like. However, the present invention is not limited to the welding, and for example, the hook may be inserted into or engaged with a hole or a recess provided in the upper core metal fitting.

  Of course, the shape is not limited to the hole and the recessed portion, and a meshing portion, a fitting portion, and a shape and a part that fit each other are provided so that the hook and the upper core metal fitting can be fixed and supported with each other. It may be something to do.

  Alternatively, the hook may be fixed to the upper core metal fitting using another member. For example, another member is a screw, a bolt, a nut, or a member using an adhesive substance such as an adhesive.

  Alternatively, when the upper iron core fitting is manufactured from a material member, it may be manufactured so as to have a hook together. For example, when forming and processing a material member, the member may be cut out, stretched, or rolled so as to have a hook.

  A space is provided so that the hook does not contact the upper insulating wall. When placing the upper core fastener, place it so that the hooks face each other.

  Studs (18, 19) are passed through the upper iron core fasteners and tightened with nuts to fix the positions of the two upper iron core fasteners.

  Further, the studs (20, 21, 22, 23, 24, 25, 26, 27) are passed through the upper iron core clamp and the lower iron core clamp, and are tightened with nuts, and then the winding is connected to the upper iron core clamp and the lower iron core. Secure with fasteners and studs.

  Insulating plates (28, 29, 30, 31) are passed to hooks provided on the upper core fastener.

  Then, as shown in FIG. 4, the amorphous iron core (32) is inserted from above into the hole or opening of the winding, or into the bobbin around which the winding is wound.

  At this time, the amorphous iron core is supported by an insulating plate.

  Thereafter, as shown in FIG. 4, the lapping operation is performed by matching the corresponding portions of the opened lower part of the amorphous iron core. By this lapping operation, the amorphous iron core becomes an annular iron core shape.

  As described above, in this embodiment, the annular lower portion of the amorphous iron core is opened and inserted into the winding from above in an upright state.

  At that time, since the amorphous iron core is supported by an insulating plate passed to the hook, the weight and weight of the amorphous iron core are applied to the winding, and the winding is damaged. It has been devised so as to reduce the deterioration of the characteristics of the physical, physical and electrical characteristics.

  Furthermore, since the amorphous iron core and the winding are raised, they are combined, assembled, and manufactured, so that, for example, the amorphous iron core and the winding are not changed in the horizontal and horizontal directions ( The standing state is, for example, a state in which the direction is changed by about 90 degrees).

  Therefore, in order to change the direction of the amorphous iron core and winding to the horizontal and horizontal directions, the necessary instruments, tools, equipment, and systems are not required, and the necessary work procedures are not required. It can be expected that work efficiency will be improved.

  Moreover, when the amorphous iron core and the winding are changed in the horizontal and horizontal directions, the unexpected force, load, load, gravity, etc. on the amorphous iron core and the winding may occur by necessity. By such means, it can be expected that the amorphous iron core, windings, and the like are reduced in mechanical, physical, and electrical characteristics.

  In the above-described embodiment, it is explained that the annular lower portion of the amorphous iron core is opened. This is normally annealed as an annular shape when the iron core is annealed. In order to insert the iron core into the winding, a part (for example, the lower part) of the annular core is opened (for example, the U-shape in FIG. 4) and inserted into the winding. Then, after the insertion, the description is made on the background that the opened portions are combined (generally called a wrapping process).

  However, the above does not necessarily stipulate that annealing must be performed in an annular shape. For example, in the case of annealing in a non-annular shape such as a U-shape, the process itself of opening a part of the iron core having the annular shape is not necessarily required. After insertion, the portions in an open state may be matched so as to have an annular shape.

  In addition, although it has been described above that the portions in the open state are matched so as to have an annular shape, the annular shape includes an annular shape as a physical shape. It is not limited only.

  The shape of the iron core that can provide a magnetic circuit that makes a round as the flow of magnetism and magnetic flux is assumed to be an annular shape. For example, it is not physically equivalent to an annular shape. For example, even if there is a gap, a gap, or an interval, the magnetic circuit as described above has a shape in which the magnetic flux makes a round and becomes an annular shape. If present, this shape is also allowed as an annular shape.

  In the above description, the standing state is described. This is an expression that means, for example, a state in which the user wakes up from a horizontally laid state or a horizontally disposed state.

  Therefore, “standing up” is not limited to the commonly used meaning of “standing up”.

  In addition, the standing state as used in the examples means a state in which the iron core is erected in, for example, the vertical and vertical directions.

  However, depending on the shape of the iron core and the measurement method, when the angle is measured, it may be expected that the direction of the iron core does not exactly match the vertical direction.

  However, the difference in angle with the vertical direction is not a problem. To be repeated, for example, it is an expression that means a state in which it is laid from a horizontally laid state or a horizontally disposed state.

  However, it can be said that the characteristic features of the above-mentioned standing state are as follows.

  When the iron core is laid down horizontally or laid down sideways, the winding into which the iron core is inserted is also laid down horizontally and laid down sideways. In this case, the winding portion positioned below the iron core in the vertical and vertical directions is affected by the weight of the iron core.

  If the transformer becomes larger and the weight of the iron core increases, the lower winding of the iron core will have a greater physical effect due to the weight of the iron core. It is something that needs to be considered.

  As for this, when the iron core is erected and the iron core is laid horizontally, from the horizontal position to the raised state, the winding portion located under the iron core is not The influence of weight and dead weight is greatly reduced. In short, since the winding portion is not located at the lower side of the iron core, it is difficult to apply the weight and weight of the iron core to the winding portion.

  As a result, the physical influence due to the weight of the iron core of the winding is improved, and it can be expected that the deterioration of the electrical characteristics and the like of the winding will be improved.

  In the above description, the vertical and vertical directions are described, but the “vertical” direction is generally the direction indicated by the thread when the weight (weight) is suspended by the thread, that is, the direction of gravity, and the horizontal plane. Is known as the vertical direction.

  According to the above-described embodiment, since the winding is not laid sideways and the weight of the winding or the amorphous iron core is applied to the outer portion of the winding, it is improved. Strength and / or insulation reliability of the winding will be improved as compared with the prior art.

  In addition, since the hook is provided to reduce the weight of the amorphous iron core from being applied to the top surface of the winding, the mechanical strength of the winding or the insulation reliability of the winding is improved compared to the conventional case. It becomes.

  In the conventional method, it may be manufactured in the order of reversal → assembly → standing, but it is expected that the work can be simplified as compared with the conventional method because the work can be performed with the iron core or the windings raised.

  In addition, it is anticipated that the said Example can respond also to the coil | winding etc. which performed the insulation process.

  In addition, it is expected that the work can be performed without greatly depending on the shape of the winding.

  1: Lower iron core clamp, 2: Lower iron core clamp, 3: Stud, 4: Stud, 5: Lower insulating wall, 6: Lower insulating wall, 7: Lower insulating wall, 8: Lower insulating wall, 9: Winding 10: Winding, 11: Winding, 12: Upper insulating wall, 13: Upper insulating wall, 14: Upper insulating wall, 15: Upper insulating wall, 16: Upper iron core fastener, 16-1: Hook, 16- 2: hook, 16-3: hook, 16-4: hook, 17: upper core fastener, 17-1: hook, 17-2: hook, 17-3: hook, 17-4: hook, 18: stud 19: Stud, 20: Stud, 21: Stud, 22: Stud, 23: Stud, 24: Stud, 25: Stud, 26: Stud, 27: Stud, 28: Insulating plate, 29: Insulating plate, 30 Insulating plate, 31: insulating plate, 32: amorphous core.

Claims (9)

In a transformer having an iron core and a winding formed by laminating a plurality of thin ribbons of magnetic materials,
A first upper core support portion provided on the first end surface side in the laminating direction of the thin ribbon of magnetic material at the upper portion of the iron core, and provided on the second end surface side opposite to the first end surface side The upper part of the iron core is supported by the second upper iron core support part,
The first upper iron core support portion and the second upper iron core support portion are shaped to extend in the longitudinal direction in a direction substantially perpendicular to the width direction of the ribbon of the magnetic material of the iron core, The iron core is arranged,
From the first upper core support part and the second upper core support part, a protrusion is provided in a direction approaching each other,
A transfer member is provided to be placed on the protrusion of the first upper core support and the protrusion of the second upper core support;
The transformer is characterized in that the iron core is supported by the transfer member. The transformer according to claim 1, wherein
The transformer, wherein the transfer member is an insulating material. The transformer according to claim 1, wherein
A first lower core support portion provided on the first end surface side in the laminating direction of the thin ribbon of magnetic material, and a second end surface side opposite to the first end surface side. 2 lower iron core support parts,
The transformer, wherein the lower part of the iron core is supported by the first lower iron core support part and the second lower iron core support part. The transformer according to claim 3,
A transformer, wherein a first insulating member is provided between the first lower iron core support portion, the second lower iron core support portion, and the winding. The transformer according to claim 4,
The transformer is characterized in that the first insulating member is placed at a position corresponding to a protrusion of the first upper core support part and a protrusion of the second upper core support part. The transformer according to claim 1, wherein
A transformer, wherein a second insulating member is provided between the protrusion of the first upper core support part, the protrusion of the second upper core support part, and the winding. The transformer according to claim 6, wherein
A transformer, wherein a space is provided between the winding and the second insulating member. The transformer according to claim 3,
A transformer for fixing the first upper core support portion, the second upper core support portion, the first lower core support portion, and the second lower core support portion is provided. vessel. A transformer having an iron core and a winding formed by laminating a plurality of thin ribbons of magnetic materials,
A first upper core support portion provided on the first end surface side in the laminating direction of the thin ribbon of magnetic material at the upper portion of the iron core, and provided on the second end surface side opposite to the first end surface side The upper part of the iron core is supported by the second upper iron core support part,
A first lower core support portion provided on the first end face side in the laminating direction of the magnetic ribbon in the lower part of the iron core, and provided on the second end face side opposite to the first end face side. The lower part of the iron core is supported by the second lower iron core support part,
In the method of manufacturing a transformer that is assembled with the iron core standing upright,
A first insulating member is provided on the first lower core support and the second lower core support;
The winding is disposed on the first insulating member;
A second insulating member is provided on the winding;
From the first upper core support part and the second upper core support part, a protrusion is provided in a direction approaching each other and corresponding to the second insulating member,
A transfer member is provided on the protrusion of the first upper core support and the protrusion of the second upper core support;
The lower part of the annular iron core is opened and in an upright state, inserted into the winding from above,
The iron core is supported by the transfer member,
After the insertion, the transformer is closed so that the lower part of the iron core is annular.

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