JP2003303718A - Transformer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To suppress deterioration in a magnetic characteristic by suppressing deformation over the entire body of a wound core in the thickness direction due to dead weight or the like, in a transformer which uses the wound core formed by stacking amorphous materials. <P>SOLUTION: Among the face in the direction of stacking the amorphous materials, outer face, and inner face of a yoke of the wound core, at least two of the faces are provided with reinforcing members each having a plate-like section to reinforce the entire body of the yoke in the direction of stacking the amorphous materials. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the structure of a transformer using a wound iron core laminated with amorphous materials.

[0002]

2. Description of the Related Art Conventionally, for example, an amorphous (amorphous magnetic alloy) ribbon-shaped material (hereinafter referred to as an amorphous material)
There is a single-phase transformer as a transformer used for the winding iron core. The single-phase transformer has an annular structure in which laminated amorphous materials are penetrated through the coil and both ends are wrapped to be connected. In the wound iron core having such a configuration, as shown in FIG.
Peeling of the lap portion 4'is likely to occur, and in order to prevent this, as shown in FIG. 7, the silicon steel sheet 1 is formed on the outer periphery of the core 1 '.
0 is wound and the silicon steel plate 10 is fixed with a tape 11 or welding, or is tightened with a band 12 'to suppress the displacement of the lap portion 4'.
Further, in JP-A-10-41146, in a transformer using a three-phase three-leg iron core, a reinforcing plate is provided between an inner winding core and an outer winding core, and an outer peripheral corner portion of the inner winding core and an outer winding core. There is described a technique for preventing loosening that occurs in the thin ribbon of the amorphous magnetic alloy near the inner circumference of the outer wound core due to the gap between the inner circumference and the inner circumference. There is no description of deformation of the wound core due to its own weight or the like.

[0003]

The amorphous material has low rigidity and is easily deformed. Therefore, even in the state of the laminated core, the yoke portion of the wound core is likely to be deformed over the entire thickness of the wound core in the stacking direction of the amorphous material due to its own weight or the like. In the case of, the deformation becomes remarkable. The deformation of the winding core of the yoke portion deteriorates the magnetic characteristics of the entire winding core 1'and increases the iron loss and noise of the transformer. FIG. 8 shows an example of a modification of the yoke portion 5 in a structure in which a silicon steel plate or the like is wound around the outer circumference of the wound iron core 1 ′ having a long yoke portion 5 and the upper portion is tightened with a band. The yoke portion 5 is deformed in a wave shape by its own weight regardless of the tightened state by the band, and the deformation easily causes the lap portion 4'to be peeled off or overlapped. Peeling or overlapping of the wrap portion 4'deteriorates the magnetic characteristics of the wound core and increases iron loss and noise of the transformer. Even without the wrap portion, wavy deformation occurs due to gravity, which deteriorates the magnetic characteristics of the wound core and increases iron loss and noise of the transformer.
Further, the technique disclosed in Japanese Patent Laid-Open No. 10-41146 is only within the range of preventing loosening of the ribbon of the amorphous magnetic alloy near the inner circumference of the outer wound core, and the wound iron core due to its own weight or the like. It cannot be considered as a sufficient countermeasure technology to prevent deformation over the entire thickness of the. In view of the situation of the above-mentioned conventional technology, the problem of the present invention is to suppress deformation of the yoke portion of the winding core in the stacking direction in a transformer using a winding core in which amorphous materials are stacked, and to suppress deterioration of magnetic characteristics. It is to be. An object of the present invention is to provide a technique capable of solving such a problem.

[0004]

[Means for Solving the Problems]
Therefore, in the present invention, a wound iron core laminated with amorphous materials is used.
Basically, the transformer used has a plate-shaped part.
A strong member is provided on the yoke part of the winding core, and the yoke part is
Reinforce and reduce at least the entire thickness of the fastening direction
Is also a structure for suppressing the deformation of the winding core in the direction in which the amorphous material is laminated.
Be successful. Specifically, as a transformer,
Amorphous material stacking direction surface, outer peripheral surface, inner peripheral surface of the yoke part
Has a plate-like portion on at least one side of the
The entire area of the amorphous material in the stacking direction.
Strengthening reinforcing member (corresponding embodiment: reference numerals 8a, 8b, 8
c₁, 8c_Two, 8a₁, 8a_Two, 8a_Three, 8a_Four, 8a
₅, 8a₆, 8a₇, 8a₈, 8d, 8e₁, 8e_Two,
8f), such as the direction of lamination of the amorphous material of the wound core
It is configured to suppress deformation. (2) Laminate amorphous materials
Provided at different positions on the annular winding core
Coils (corresponding embodiment: reference numerals 3a, 3b, 3c),
The yoke portion is provided on the yoke portion between the plurality of coils.
Of the amorphous material stacking direction surface, outer peripheral surface, and inner peripheral surface
It has a plate-shaped part on the side of two or more surfaces and
Rufus material Reinforced over the entire thickness in the stacking direction
Reinforcement member that suppresses deformation of the core amorphous material stacking direction
(Applicable embodiment: reference numerals 8a, 8b, 8c₁, 8c_Two, 8a
₁, 8a_Two, 8a_Three, 8a_Four, 8a ₅, 8a₆, 8
a₇, 8a₈, 8d, 8e₁, 8e_Two, 8f) and
It has a different configuration. (3) Rings made by stacking amorphous materials
Coils installed at different positions on the winding core
And a yoke provided on the yoke portion between the plurality of coils.
Of the amorphous material stacking direction surface, outer peripheral surface, and inner peripheral surface
Has a plate-like portion on the side of two or more surfaces of the
Rufus material Reinforced over the entire thickness in the stacking direction
Reinforcement member that suppresses deformation such as core amorphous material stacking direction
And fixing for fixing or reinforcing the reinforcing member to the yoke portion
Member (corresponding embodiment: reference numerals 9 and 12)
And (4) Odor of (1), (2) or (3) above
The reinforcing member has a U-shaped cross section.
It (5) In the above (1), (2) or (3),
The reinforcing member is configured to have an L-shaped cross section.
(6) In the above (1), (2) or (3), the above
Connect the wound iron core to the yoke part by connecting the amorphous material of each layer.
The lap portions have lap portions that are circumferentially offset from each other.
The reinforcing member at a position corresponding to the wrap portion.
The above-mentioned plane is arranged. (7) Above (1),
In (2) or (3), the winding core is
A number of first winding cores and a plurality of the first winding cores on the inner circumference.
And an annular second winding core.
Material is provided on the yoke portion of the second winding core to supplement the yoke portion.
With a structure that strongly suppresses deformation such as the amorphous material stacking direction
To do. (8) Odor of (1), (2) or (3) above
The above reinforcing member to one winding member to a plurality of winding cores.
The configuration is shared. (9) The above (1), (2) or
In (3), the reinforcing member is made of a metal material, and
Do not form a conductive path around the yoke. (1
0) In the above (1), (2) or (3), the volume
The iron core has a three-phase three-leg type configuration or a three-phase five-leg type configuration.
It

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a first embodiment of the transformer of the present invention. The present embodiment is a configuration example in the case of a three-phase three-leg iron core transformer using a wound iron core formed by laminating amorphous materials. FIG. 1 (a) shows two inner wound cores and one
FIG. 1 is a side view showing a configuration in which individual outer winding cores are combined.
(B) is a perspective view of an outer winding core. In FIG. 1, 1
Is an outer wound core, 2a, 2b is an inner wound core, 3a, 3b,
3 c is a coil, 4 is a wrap portion in which the joint portions of the end portions of the amorphous materials laminated on the outer winding core 1 are circumferentially displaced from each other, and 4 a and 4 b are the inner winding core 2 respectively.
Lap parts 5, 5 ′ in which the joint parts of the end parts of the amorphous materials laminated in a and 2b are shifted in the circumferential direction from each other.
Is a yoke portion of the outer wound iron core 1, 6 is a corner portion, 7a is a core portion of the outer wound iron core 1 (a portion to be inserted into the coil 3a), 7
b is a core portion (portion to be inserted into the coil 3c) of the outer wound core 1, 8a and 8b are reinforcing members, and 9 is a reinforcing member 8.
a tape as a fixing member for reinforcing the reinforcing members a and 8b and fixing the reinforcing members 8a and 8b to the yoke portion 5 side;
Is also a band as a fixing member. The upper part of the figure is the upper side of the transformer, and the lower part of the figure is the lower side of the transformer, and gravity acts in the direction of G. At the time of manufacture, the inner winding core 2a is inserted into the coils 3a and 3b, and then magnetically connected by the wrap portion 4a to form an annular shape, and the inner winding core 2b is inserted into the coils 3b and 3c. The wrap portion 4b is magnetically connected to form an annular shape, and the outer wound core 1 is inserted into the coils 3a and 3c outside the inner wound iron cores 2a and 2b, and then the wrap portion 4 serves as a magnetic circuit. It is connected to form a ring. In the transformer of the present embodiment, each of the wrap portions is provided in the yoke portion below the coil in each winding core. The reinforcing members 8a and 8b each have a plate shape, and the reinforcing member 8a is arranged on the inner peripheral surface side of the yoke portion 5 of the outer wound core 1, and the reinforcing member 8b is arranged on the outer peripheral surface side of the yoke portion 5. By sandwiching the yoke portion 5 with both reinforcing members, the strength of the yoke portion in the stacking direction of the amorphous material is supplemented. The reinforcing member 8a is, for example, the outer wound core 1
Is formed on the outer peripheral portions of the inner wound cores 2a and 2b before the annular shape is formed. The tape 9 is a reinforcing member 8a, 8b.
Is fixed to the yoke portion 5, or the reinforcing members 8a and 8b are reinforced. The tape 9 may be provided on the reinforcing plate 8a in advance. The band 12 is wound around the outer wound core 1 to fix the reinforcing member 8b to the yoke portion 5 or to reinforce the outer wound core 1. With the configuration in which the reinforcing members 8a and 8b are arranged, deformation in the direction of gravity due to the weight of the yoke portion 5 of the wound core, that is, deformation in the amorphous material stacking direction is suppressed. The fixing member is not limited to the above-mentioned tape, and a string-shaped member may be used, or a screw or bolt made of an insulating material, an insulating-treated member, or the like may be used. Further, in the configuration of FIG. 1, the reinforcing members 8a and 8b are provided only on the yoke portion 5 side of the outer wound core 1, but in addition to this, for example, the yoke portion 5 '.
It may be provided on the side, or the inner wound cores 2a, 2b
May be provided on each of the yoke portions of
The reinforcing member 8a is provided on the inner peripheral surface side of each of the inner winding cores 2a and 2b, and the reinforcing member 8b is provided on the outer peripheral surface side of the outer winding core 1, and the yoke portions of the inner winding cores 2a and 2b and the outer winding cores are formed. Both the first yoke portion and the one yoke portion may be sandwiched to reinforce. According to the first embodiment, in the three-phase three-leg iron core transformer, deformation of the yoke portion 5 of the winding core due to its own weight or the like is suppressed, peeling of the wrap portion 4 is prevented, and the magnetic characteristics of the winding iron core are deteriorated. Can be suppressed. Therefore, the iron loss of the transformer and the increase in noise can be suppressed.

FIG. 2 is a diagram showing a second embodiment of the present invention.
is there. This example is a wound iron formed by stacking amorphous materials.
It is an example of composition in the case of a three phase five leg iron core transformer using a core.
In FIG. 2, 2a₁2a_Two2a_Three2a_FourIs iron
Hearts 3a, 3b, 3c are coils, 4a₁4a_Two4a
_Three4a_FourIs the winding iron core 2a₁2a_TwoTwo
a_Three2a_FourAt the end of the amorphous material
Lap part 5a in which seams are circumferentially offset from each other
₁5a_Two5a_Three5a_Four5a₅5a ₆5,
a₇5a₈Is the winding iron core 2a₁2a_Two2a
_Three2a_FourYoke part, 7a₁Is the winding iron core 2a₁Core of
(Portion inserted into coil 3a), 7a _TwoIs iron core 2
a_TwoCore part (portion inserted into coil 3a), 7a
_ThreeIs the winding iron core 2a_TwoCore part (inserted into the coil 3b
Part), 7a_FourIs the winding iron core 2a_ThreeCore part (in coil 3b
Part to be inserted into), 7a₅Is the winding iron core 2a_ThreeCore of
(Portion inserted into coil 3c), 7a₆Is iron core 2
a_FourCore part (portion inserted into coil 3c), 8a
₁, 8a_Two, 8a_Three, 8a_Four, 8a₅, 8a₆, 8
a₇, 8a₈Is the winding iron core 2a₁2a_Two2a
_Three2a_FourYoke part 5a₁5a_Two5a_Three5,
a_Four5a₅5a₆5a₇5a₈Installed on the inner peripheral surface side of
Stripped plate-shaped reinforcing member, 8c₁Is the yoke portion 5a₁,
5a_Two5a_Three5a_FourCommonly provided on the outer peripheral surface side of
1 plate-shaped reinforcing member, 8c_TwoIs the yoke portion 5a ₅,
5a₆5a₇5a₈Commonly provided on the outer peripheral surface side of
It is also a single plate-shaped reinforcing member. In the second embodiment
However, the upper part of the figure shows the upper side of the transformer, and the lower part of the figure shows the transformer.
It is assumed that gravity acts in the direction of G on the lower side. Production
When the iron core 2a₁Wraps after being inserted into coil 3a
Part 4a₁It is connected in a magnetic circuit with an annular shape, and a winding iron core
2a_TwoIs inserted into the coils 3a and 3b, and then the wrap portion 4
a_TwoIs connected in a magnetic circuit to form a ring, and the winding iron core 2a
_ThreeIs inserted into the coils 3b and 3c, and then the wrap portion 4a_Three
Is connected in a magnetic circuit to form a ring, and the winding iron core 2a_FourIs
After being inserted into the coil 3c, the wrap portion 4a_FourWith magnetic circuit
Are connected to form a ring. In the transformer of this embodiment
However, each of the above-mentioned wrap portions is a coil with its respective winding iron core.
It is provided on the lower yoke part. In such a configuration,
The reinforcing member is formed by sandwiching the respective yoke portions with the yoke portion of the winding core.
The core strength of the winding core
Especially the yoke 5a₁5a_Two5a_Three5a_Four5a
₅5a₆5a₇5a₈Deformation, especially due to its own weight, etc.
Deformation in the direction of gravity due to, that is, how to stack amorphous
Suppress the deformation of the direction. According to the second embodiment, three phases 5
In the leg iron core transformer, each yoke portion 5a of each winding iron core₁,
5a_Two5a_Three5a_Four5a₅5a₆5a₇5,
a₈Deformation due to its own weight, etc. is suppressed. By this
Each wrap 4a₁4a_Two4a_Three4a_FourStripping
Detachment is also prevented, deterioration of magnetic properties of the wound core is suppressed,
The iron loss of the transformer and the increase of noise can also be suppressed. Also, the reinforcement part
Material 8c₁, 8c_TwoThe yoke portion 5a₁5,
a_Two5a_Three5a_Four, Yoke part 5a₅5a₆5a
₇5a₈The number of parts of the reinforcing member
Can be reduced.

FIG. 3 is a diagram showing a third embodiment of the present invention. The present embodiment is an example of using a reinforcing member having a U-shaped cross section. In FIG. 3, 8d is a reinforcing member having a U-shaped cross section. The structure of the other parts is the same as that of the first embodiment. The reinforcing member 8d is attached to the outer winding core 1
On the yoke portion 5 of the three plate-shaped portions 8d of the reinforcing member 8d.
₁ , 8d ₂ and 8d ₃ are provided so as to be respectively arranged on the inner peripheral surface side and the outer peripheral surface side of the yoke portion 5 and in the amorphous material laminating direction. The yoke portion 5 reinforced by the reinforcing member 8d
There is a wrap inside. Plate-shaped portions 8d ₁ and 8d ₂
The bending rigidity of the plate-shaped portion in the thickness direction suppresses deformation of the yoke portion 5 of the outer wound core 1 and the plate-shaped portion 8d ₃
The bending rigidity in the direction along the plate-shaped partial plane suppresses deformation of the yoke portion 5 of the outer wound core 1. Such a reinforcing member having a U-shaped cross section may be provided on the yoke portion 5 ', or may be provided on each of the yoke portions of the inner wound cores 2a and 2b in the configuration of FIG. In addition, the plate-shaped portion 8 is provided on the inner peripheral surface side of each of the inner winding cores 2a and 2b.
d _{1 so} that the plate-like portion 8d ₂ is arranged on the outer peripheral surface side of the outer wound core 1, and the yoke portions of the inner wound cores 2a and 2b and the yoke portion of the outer wound core 1 are sandwiched and reinforced. It may be configured. According to the configuration of the third embodiment, the plate-shaped portion 8
Because of the structure having d ₃ , the yoke portion can be reinforced by high rigidity, and deformation of the wound core can be suppressed. by this,
The peeling of the wrap can be prevented, the deterioration of the magnetic characteristics of the wound core can be suppressed, and the iron loss of the transformer and the increase of noise can also be suppressed.
Further, since the plate-shaped portions 8d ₁ , 8d ₂ , 8d ₃ are integrally formed, the number of parts of the reinforcing member can be reduced. Furthermore, the workability of incorporating the reinforcing member into the yoke portion can be improved. As a result, the cost of the transformer can be reduced.

FIG. 4 is a diagram showing a fourth embodiment of the present invention. The present embodiment is an example of the configuration in the case of using a reinforcing member having an L-shaped cross section. 4 (a) is a reinforcing member, FIG.
(B) shows a reinforcing state of the yoke portion 5 by the reinforcing member. 4, 8e ₁ and 8e ₂ are reinforcing members having an L-shaped cross section, 8e ₁₁ and 8e ₁₂ are two plate-shaped portions of the reinforcing member 8e ₁ , and 8e ₂₁ and 8e ₂₂ are reinforcing members 8e ₂ . Two plate-shaped parts. The configuration of the other parts is assumed to be the same as in the case of the first embodiment. Reinforcement member 8
plate-shaped portion of the reinforcing plate-like portion _{8e 11} of e ₁ member 8e ₂ 8
e _21, respectively, the outer peripheral surface of the yoke portion 5, arranged on the inner peripheral surface side, the plate-like portion _{8e 22} between the plate portion _{8e 12} of the reinforcing member 8e ₁ reinforcing member 8e ₂ is amorphous material of the yoke portion 5 They are arranged in the stacking direction. The wrap portion is located in the yoke portion 5 reinforced by the reinforcing members 8e ₁ and 8e ₂ . Plate-like portion _8e 11, _{8e 2 1} is the thickness direction of the flexural rigidity of the plate-like portion, to suppress the deformation of the yoke portion 5 of the wound core 1, the plate-like portion _8e 12, _{8e 22,} the plate-like portion The bending rigidity in the direction along the plane suppresses deformation of the yoke portion 5 of the wound core 1. The reinforcing member having such an L-shaped cross section is
For example, it may be provided on the yoke portion 5'side, or may be provided on each of the yoke portions of the inner wound cores 2a and 2b in the configuration of FIG. In addition, the inner winding iron core 2a,
Reinforcing member 8e _{2 is provided} on the inner peripheral surface side of each yoke portion of 2b.
Plate portion 8e _21, as the plate-like portion 8e ₁₁ of the reinforcing member 8e ₁ on the outer peripheral surface of the yoke portion of the outer wound core 1 is arranged, the inner wound cores 2a, the yoke portion of 2b and the outer winding core 1
Both the yoke portion and the yoke portion may be reinforced by sandwiching the plate-shaped portions 8e ₂₁ and 8e ₁₁ . According to the configuration of the fourth embodiment, since the plate-shaped portions 8e ₁₂ and 8e ₂₂ are provided, the yoke portion can be reinforced by the high rigidity, and the wound core 1
The deformation of the yoke portion can be suppressed. As a result, peeling of the wrap portion can be prevented, deterioration of the magnetic characteristics of the wound core can be suppressed, and iron loss and noise of the transformer can be suppressed. Moreover, the number of parts of the reinforcing member can be reduced. The workability of assembling the reinforcing member into the yoke portion can be improved. As a result, the cost of the transformer can be reduced.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.
is there. The present embodiment is a case of a three-phase five-leg iron core transformer.
And using a reinforcing member having a U-shaped cross section
Here is an example. In FIG. 5, 2a₁2a_Two2a_ThreeTwo
a_FourIs the iron core 5a₁5a_Two5a_Three5a_Four5a
₅5a₆5a₇5a₈Is the iron core 2
a₁2a_Two2a_Three2a_FourYoke part, 8a₁, 8
a_Two, 8a_Three, 8a_FourIs the winding iron core 2a₁2a
_Two2a_Three2a_FourYoke part 5a₁5a_Two5,
a_Three5a_FourA plate-shaped reinforcing member provided on the inner peripheral surface side of the
8f is a yoke portion 5a₁5a_Two5a_Three5a_FourOut of
One U-shaped cross-section reinforcement part commonly provided on the peripheral surface side
Material, 8f₁, 8f_Two, 8f_ThreeIs the three reinforcement members 8f
A plate-shaped portion 9 is a tape as a fixing member. Book number
Also in the fifth embodiment, the yoke portion 5a is formed.₅5a ₆5a
₇5a₈Side is the upper side of the transformer, yoke part 5a₁5a
_Two5a_Three5a_FourSide is the lower side of the transformer,
In the state, gravity acts downward. Within each winding core
The wrap portion is the yoke portion 5a.₁5a_Two5a_Three5,
a_FourIt is provided on the side. Plate-shaped portion 8f of the reinforcing member 8f₁When
8f_ThreeAre the yoke parts 5a ₁5a_Two5a_Three,
5a_FourAre arranged in the amorphous material stacking direction of the reinforcing member 8
plate-shaped part 8f of f_TwoIs the yoke 5a₁5a_Two5a
_Three5a_FourIs arranged on the outer peripheral surface side. Reinforcing member 8a₁, 8
a_Two, 8a_Three, 8a_FourAnd tape around the reinforcing member 8f
9 is provided and the reinforcing member 8a₁, 8a_Two, 8a_Three, 8a
_Four, 8f are fixed to the corresponding yoke portions.
Plate-shaped portion 8f of the reinforcing member 8f having a U-shaped cross section_TwoIs
Due to the bending rigidity in the thickness direction of the plate-shaped portion,
Yoke part 5a ₁5a_Two5a_Three5a_FourTransformation in
Suppresses the plate portion 8f₁, 8f_ThreeIs the plate-shaped partial plane
Due to the bending rigidity in the direction along the
Suppress the deformation in. Take 8a₁, 8a_Two, 8
a_Three, 8a_FourAnd the reinforcing member 8f are also installed on the yoke portion 5'side.
You may choose to turn it off. According to the fifth embodiment, 3
In the phase five-leg iron core transformer, each yoke portion 5a of each winding iron core
₁5a_Two5a_Three5a_FourDeformation due to its own weight, etc.
Can be suppressed. By doing this, peel off the wrap of each winding core.
Detachment is also prevented, deterioration of magnetic properties of the wound core is suppressed,
The iron loss of the transformer and the increase of noise can also be suppressed. Especially the reinforcement part
Material 8f is plate-shaped portion 8f₁, 8f_ThreeFor having a yoke
The reinforcing strength for the part can be increased. Also, the reinforcing member 8f
The yoke 5a₁5a_Two5a_Three5a_FourShare with
Due to this structure, it is possible to reduce the number of parts of the reinforcing member.
it can.

Although the plate-like portion of the reinforcing member has a flat surface in each of the above embodiments, the present invention is not limited to this, and the plate-like portion has a convex shape. There may be a part or a concave part. In addition, for example, a chipped portion or a hole-shaped portion may be included in the plane of the plate-shaped portion. The wrap portion of each wound core may not be located in the yoke portion reinforced by the reinforcing member. Further, the wound iron core may be formed by continuously winding an amorphous material in a spiral shape without a wrap portion. The transformer is not limited to the 3-phase 3-leg core transformer or the 3-phase 5-leg core transformer. The technique of the present invention is also applicable to the case where the wound iron core is made of a magnetic material other than an amorphous material.

[0011]

According to the present invention, in the transformer, the yoke portion can be reinforced to suppress the deformation of the entire thickness of the wound core, and the deterioration of the magnetic characteristics of the wound core can be suppressed. It is also possible to suppress an increase in noise.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a diagram showing a fourth embodiment of the present invention.

FIG. 5 is a diagram showing a fifth embodiment of the present invention.

FIG. 6 is an explanatory diagram of peeling of a wrap portion in a yoke portion of a wound iron core.

FIG. 7 is a diagram showing an example of a conventional technique for preventing peeling of a lap portion.

8A and 8B are explanatory views of deformation of a yoke portion in the conventional technique of FIG.

[Explanation of symbols]

1, 1 '... outer winding core, 2a, 2b ... inner winding core,
2a₁2a_Two2a _Three2a_Four… Winding iron core, 3a, 3
b, 3c ... coil, 4, 4 ', 4a, 4b, 4a₁,
4a_Two4a_Three4a_Four… Wrap part, 5, 5 ', 5a
₁5a_Two5a_Three5a_Four5a₅5a₆5,
a₇5a₈... Yoke part, 6, 6 '... Corner part, 7a,
7b, 7a₁, 7a_Two, 7a_Three, 7a_Four, 7a₅, 7a
₆... Core part, 8a, 8b, 8c₁, 8c_Two, 8a₁, 8
a_Two, 8a_Three, 8a_Four, 8a₅, 8a₆, 8a₇, 8a
₈, 8d, 8e₁, 8e_Two, 8f ... Reinforcing member, 9, 1
1 ... tape, 12,12 '... band.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroyuki Endo             46-1 Tomioka, Nakajo-cho, Kitakanbara-gun, Niigata Prefecture             Hitachi Industrial Equipment Systems Co., Ltd. F-term (reference) 5E062 AA02 AB05

Claims (10)

[Claims] 1. A transformer using a wound iron core in which amorphous materials are laminated, wherein a plate-shaped portion is formed on the side of at least one of the amorphous material laminating direction surface, the outer peripheral surface and the inner peripheral surface of the yoke portion of the winding iron core. A transformer, comprising: a reinforcing member capable of reinforcing the yoke portion over the entire thickness in the amorphous material stacking direction to suppress deformation of the wound core. 2. A transformer using an annular winding iron core laminated with amorphous material, wherein a plurality of coils are provided at different positions on the winding iron core and yokes are provided between the plurality of coils. 2 of the amorphous material stacking direction surface, the outer peripheral surface, and the inner peripheral surface of the yoke portion
A transformer having plate-like portions on one or more surfaces and reinforcing the yoke portion over the entire thickness in the amorphous material stacking direction to suppress deformation of the wound core. vessel. 3. A transformer using an annular winding iron core laminated with amorphous materials, wherein a plurality of coils are provided at different positions on the winding iron core and yokes are provided between the plurality of coils. The yoke portion has plate-like portions on the side of two or more of the amorphous material laminating direction surface, the outer peripheral surface, and the inner peripheral surface, and the yoke portion is reinforced over the entire thickness in the amorphous material laminating direction. A transformer comprising: a reinforcing member that suppresses deformation of the wound iron core; and a fixing member that fixes or reinforces the reinforcing member to the yoke portion. 4. The reinforcing member has a U-shaped cross section, and is formed on one side surface of the yoke portion in the stacking direction of the amorphous material and on both the inner and outer peripheral surfaces of the yoke portion, or on the yoke portion. The transformer according to claim 1, 2 or 3, wherein the yoke portion is reinforced while covering both side surfaces in the amorphous material stacking direction and one of the inner peripheral surface and the outer peripheral surface of the yoke portion. 5. The reinforcing member has an L-shaped cross section, and is formed on one side surface of the yoke portion in the amorphous material stacking direction and both of the inner peripheral surface and the outer peripheral surface of the yoke portion, or of the yoke portion. The transformer according to claim 1, 2 or 3, wherein the yoke portion is reinforced while covering both side surfaces in the amorphous material stacking direction and one of the inner peripheral surface and the outer peripheral surface of the yoke portion. 6. The winding core has a wrap portion in which the joint portions of the amorphous materials of the respective layers are offset from each other in the circumferential direction in the yoke portion, and the reinforcing member is provided with the flat surface at a position corresponding to the wrap portion. The transformer according to claim 1, 2 or 3, wherein the transformer is arranged. 7. The winding iron core has a plurality of annular first winding iron cores and an annular second winding iron core including the plurality of first winding iron cores in its inner circumference, and the reinforcing member is The transformer according to claim 1, 2 or 3, wherein the transformer is provided in a yoke portion of the second winding core. 8. The transformer according to claim 1, wherein the reinforcing member is configured such that one reinforcing member is shared by a plurality of wound iron cores. 9. The transformer according to claim 1, 2 or 3, wherein the reinforcing member is made of a metal material and a conductive path is not formed around the yoke portion. 10. The transformer according to claim 1, wherein the winding core has a three-phase three-leg type configuration or a three-phase five-leg type configuration.