JP6713841B2 - Transformer - Google Patents

Description

This embodiment relates to a transformer.

Conventionally, a transformer is provided with a coil unit configured by a plurality of layers of coils, and an iron core penetrating the coil unit. The coil unit and the iron core are supported by the frame unit. Terminals for inputting or outputting electric power to the transformer are provided in the frame unit or the coil unit, respectively. These terminals are connected to an external power line or distribution line.

When the transformer is shaken due to an earthquake or the like, relative displacement occurs between the coil unit, the iron core, and the frame unit that configure the transformer. Therefore, when the earthquake resistance of the transformer is low, the relative sway between them expands. As a result, the displacement between the terminal and the power cable connected to the terminal also increases, which may lead to disconnection.

JP, 2005-177085, A JP, 2013-207156, A

Then, the objective of this embodiment is to provide the transformer which improves earthquake resistance.

In order to solve the above problems, the transformer of the present embodiment includes a coil unit, an iron core, a frame unit and a support member. The coil unit has a tubular shape molded with resin. The iron core penetrates the coil unit. The frame unit supports the coil unit. The support member is provided between an axial end portion of the coil unit and the iron core facing the coil unit, is in contact with both the coil unit and the iron core, and is disposed relative to the iron core with respect to the coil unit. Restrict movement.

FIG. 2 is a schematic view of a coil unit and an iron core of a transformer according to an embodiment, viewed from the direction I in FIG. 1 is a schematic perspective view showing a transformer according to one embodiment. Schematic view from the direction III in Figure 1. Schematic view from the IV direction in FIG. 1 is a schematic perspective view illustrating a frame unit of a transformer according to an exemplary embodiment. Schematic which expanded the vicinity of the fixed seat member of the transformer by one Embodiment. 1 is a schematic perspective view showing a fixed seat portion of a transformer according to an embodiment.

Hereinafter, an embodiment of the transformer according to the present embodiment will be described with reference to the drawings.
As shown in FIG. 2, the transformer 10 includes a coil unit 11, an iron core 12, a frame unit 13, a fixed seat member 14 and a support member 15. The transformer 10 of this embodiment is a transformer used for a three-phase AC power supply. The coil unit 11 is molded with resin, and is provided in a cylindrical shape with the iron core 12 penetrating inside. In the case of the present embodiment, the coil unit 11 is provided in three cylindrical shapes arranged in parallel corresponding to the three-phase alternating current. That is, the coil unit 11 has the first coil 21, the second coil 22, and the third coil 23 in order from the left side of FIG. The first coil 21, the second coil 22, and the third coil 23, which form the coil unit 11, each have a terminal portion 24 on the front upper end side in the front-rear direction. The terminal portion 24 is connected to an external wiring. The first coil 21, the second coil 22, and the third coil 23 have a terminal portion 25 at the rear in the front-rear direction. The terminal portion 25 is connected to an external wiring similarly to the terminal portion 24.

The first coil 21, the second coil 22, and the third coil 23 that form the coil unit 11 have an inner peripheral side coil 26 and an outer peripheral side coil 27, respectively, as shown in FIG. The inner circumference side coil 26 and the outer circumference side coil 27 are both formed in a tubular shape. The outer peripheral coil 27 covers the outer peripheral side of the inner peripheral coil 26 in a tubular shape. The inner peripheral side coil 26 of the coil unit 11 is provided on the side closer to the iron core 12 in the radial direction.

The iron core 12 penetrates the first coil 21, the second coil 22, and the third coil 23 of the coil unit 11, respectively, as shown in FIGS. 3 and 4. Specifically, the iron core 12 of the present embodiment has a first inner core 31, a second inner core 32, and an outer core 33. The first inner core 31 is formed in an annular shape that passes through the first coil 21 and the second coil 22. The second inner core 32 is formed in an annular shape that passes through the second coil 22 and the third coil 23. The outer iron core 33 is provided on the outer peripheral side of the first inner iron core 31 and the second inner iron core 32, and is formed in an annular shape penetrating the first coil 21 and the third coil 23.

The frame unit 13 shown in FIG. 5 supports the coil unit 11 and the iron core 12 as shown in FIG. The frame unit 13 has an upper clamp 41, a lower clamp 42, a side clamp 43, and a side clamp 44, as shown in FIG. The upper clamp 41 is provided above the coil unit 11 in the vertical direction, that is, the vertical direction. The lower clamp 42 is provided on the lower side in the vertical direction with the coil unit 11 interposed therebetween.

The side clamp 43 and the side clamp 44 extend in the vertical direction and connect the upper clamp 41 and the lower clamp 42. The side clamp 43 is provided so as to penetrate the first coil 21 and the third coil 23. The side clamp 44 is provided so as to penetrate the first coil 21 and the third coil 23. In the case of the present embodiment, the side clamp 43 and the side clamp 44 are plate-like members that are bent so that the cross section perpendicular to the vertical direction has an L shape, as shown in FIG. As a result, the frame unit 13 has increased strength against shaking in the left-right direction and the front-back direction in FIG.

The side clamp 43 and the side clamp 44 have a frame portion 45 near the lower end on the lower clamp 42 side. The frame portion 45 projects in a frame shape from the side clamp 43 and the side clamp 44. The side clamp 43, the side clamp 44, and the lower clamp 42 are fixed to each other in the frame portion 45 by using, for example, bolts and nuts. By providing the frame portion 45 protruding from the side clamp 43 and the side clamp 44 in this way, the strength of the side clamp 43 and the side clamp 44 is increased together with the L-shaped bent shape.

In the case of the present embodiment, the transformer 10 may further include a fixed seat member 14 in addition to the above configuration. The fixed seat member 14 is provided below the frame unit 13 as shown in FIG. Specifically, the fixed seat member 14 is provided below the lower clamp 42 that constitutes the frame unit 13. In the case of this embodiment, the frame unit 13 has a support leg 46 extending in the front-rear direction below the lower clamp 42 as shown in FIG. The support leg 46 is provided at each end of the lower clamp 42 in the left-right direction. The fixed seat member 14 is provided on the support leg 46. The transformer 10 is fixed to an external facility by using the support legs 46 and the fixed seat member 14. In the case of the present embodiment, the fixed seat member 14 is provided at each end of the support leg 46 in the front-rear direction. As shown in FIGS. 2 and 6, the fixed seat member 14 is connected to the support leg 46 of the frame unit 13 by a plurality of bolts 47.

The fixed seat member 14 has a bottom portion 51 and side portions 52 as shown in FIG. 7. The bottom portion 51 is provided on the fixed seat member 14 on the lower end side far from the coil unit 11. The bottom portion 51 contacts a facility for fixing the transformer 10. The side portion 52 rises upward from the bottom portion 51. A pair of side parts 52 is provided in the front-rear direction of the transformer 10. The side portion 52 is formed with an inclined portion 53 that is inclined so that the height closer to the support leg 46 is higher in the vertical direction. Further, the fixed seat member 14 has a back portion 54. The back portion 54 contacts the support leg 46. The back portion 54 connects the pair of side portions 52 on the support leg 46 side of the bottom portion 51. The bottom portion 51, the pair of side portions 52, and the back portion 54 that constitute the fixed seat member 14 are integrally formed integrally from a single metal plate member. The back portion 54 has bolt holes 55. A bolt 47 for fixing the fixed seat member 14 and the support leg 46 is inserted into the bolt hole 55.

By using the fixed seat member 14, the transformer 10 is fixed to an external facility with a fastening member such as a bolt (not shown). At this time, the plate member 56 is inserted between the fixed seat member 14 and the bolt (not shown). The plate member 56 is provided so as to overlap the bottom portion 51. As a result, the plate member 56 does not directly transmit the force received from the bolt (not shown) that fixes the transformer 10 and the equipment to the bottom portion 51 of the fixed seat member 14. Therefore, damage and deformation of the fixed seat member 14 are reduced, and the strength is improved.

Next, the support member 15 will be described in detail.
The support member 15 is provided between the end of the coil unit 11 in the axial direction, that is, the vertical direction, and the iron core 12 facing the coil unit 11. The support member 15 is formed of an elastic body made of, for example, hard rubber or resin, and is in contact with both the coil unit 11 and the iron core 12. Thereby, the support member 15 restricts the relative movement between the coil unit 11 and the iron core 12. That is, when relative movement occurs between the coil unit 11 and the iron core 12 due to the vibration applied to the transformer 10, this relative movement is absorbed by the deformation of the support member 15. As a result, even if the transformer 10 is shaken, the relative movement between the coil unit 11 and the iron core 12 is reduced by the support member 15.

In the case of this embodiment, the transformer 10 includes a support member 15 as shown in FIGS. 1, 3, and 4. FIG. 1 is a view of the coil unit 11 and the iron core 12 of the transformer 10 as viewed from above. That is, in the case of the example shown in FIG. 1, the transformer 10 is provided with eight support members 15, four of which are provided between the coil unit 11 and the iron core 12 as shown by the broken line in FIG. Has been. The remaining four support members 15 are provided between the coil unit 11 and the frame unit 13. The transformer 10 also includes a support member 15 below the coil unit 11 which is arranged similarly to the example shown in FIG. 1 or symmetrical to the example shown in FIG.

The end of the support member 15 sandwiched between the coil unit 11 and the iron core 12 on the coil unit 11 side is in contact with the outer peripheral coil 27 of the first coil 21, the second coil 22 or the third coil 23. There is. The end of the support member 15 on the iron core 12 side is in contact with the first inner core 31 or the second inner core 32. As described above, in the present embodiment, at least a part of the support member 15 is provided between the outer peripheral coil 27 of the coil unit 11 and the iron core 12.

In the present embodiment, by providing the supporting member 15 between the coil unit 11 and the iron core 12, either the first coil 21 or the second coil 22 adjacent to each other as shown in FIGS. 1, 3, and 4 is used. On the other hand, the space formed between the first inner core 31 and the first inner core 31 is not closed by the support member 15. Similarly, between the adjacent second coil 22 and the third coil 23, the space formed between the second coil 22 or the third coil 23 and the second inner core 32 supports the space. It is not blocked by the member 15. In this way, by ensuring a space that is not blocked between the coil unit 11 and the iron core 12, the flow of air is not obstructed by the support member 15. As a result, the relative movement between the coil unit 11 and the iron core 12 is reduced without hindering the heat dissipation of the coil unit 11.

According to the embodiment described above, at least a part of the support member 15 of the transformer 10 is provided between the coil unit 11 and the iron core 12. Therefore, even if the transformer 10 is shaken or vibrated, the relative movement between the coil unit 11 and the iron core 12 is absorbed by the support member 15 which is an elastic body. Thereby, the relative movement between the coil unit 11 and the iron core 12 due to the swing of the transformer 10 is reduced. Further, since the relative movement between the coil unit 11 and the iron core 12 is reduced, the disconnection between the terminal portion 24 and the terminal portion 25 and the external wiring due to this is reduced. Therefore, the earthquake resistance of the transformer 10 can be improved.

Further, in one embodiment, at least a part of the support member 15 is provided between the coil unit 11 and the iron core 12. Therefore, a space is secured between one of the adjacent coil units 11 and the iron core 12. A space is secured between the other of the adjacent coil units 11 and the frame unit 13. Therefore, the air that cools the coil unit 11 easily passes through the space secured between the coil unit 11 and the iron core 12 and the space secured between the coil unit 11 and the frame unit 13. Therefore, the earthquake resistance of the transformer 10 can be improved without hindering the heat dissipation of the coil unit 11.

In one embodiment, the support member 15 is provided between the iron core 12 and the outer peripheral coil 27 that is farther from the iron core 12 in the radial direction of the coil unit 11. The relative movement between the coil unit 11 and the iron core 12 due to the swing of the transformer 10 is likely to increase toward the outside in the radial direction of the coil unit 11. Therefore, by providing the support member 15 between the outer peripheral coil 27 and the iron core 12, the relative swing between the coil unit 11 and the iron core 12 is further reduced. Therefore, the earthquake resistance of the transformer 10 can be improved. Further, by providing the support member 15 between the outer peripheral coil 27 and the iron core 12, the flow of air is promoted inward in the radial direction of the coil unit 11 where heat is easily accumulated. Therefore, heat dissipation of the coil unit 11 can be further promoted.

In one embodiment, the side clamp 43 and the side clamp 44 are plate shapes that are bent so that a cross section perpendicular to the vertical direction has an L shape. The side clamp 43 and the side clamp 44 have a frame portion 45 protruding in a frame shape. Accordingly, when the side clamp 43 and the side clamp 44 are formed in a plate shape so as to be inserted into the limited space, the strength of the side clamp 43 and the side clamp 44 is secured even if the plate thickness is reduced. Therefore, the deformation of the frame unit 13 is reduced, and the earthquake resistance of the transformer 10 can be improved.

In one embodiment, the fixed seat member 14 is fixed to the support legs 46 of the frame unit 13 by a plurality of bolts 47. As a result, the amount of displacement between the fixed seat member 14 and the frame unit 13 is reduced. The terminal portion 24 and the terminal portion 25 of the transformer 10 are provided above the transformer 10 in the vertical direction. Therefore, the displacement between the fixed seat member 14 and the frame unit 13 below the transformer 10 may be amplified at the terminal portion 24 and the terminal portion 25. Therefore, by reducing the displacement between the fixed seat member 14 and the frame unit 13, the influence of the terminal portions 24 and 25 on external wiring is reduced. Therefore, disconnection between the transformer 10 and external wiring can be reduced.

In one embodiment, the fixed seat member 14 has a pair of side portions 52 cut out by the inclined portions 53. Therefore, the bolt (not shown) inserted into the fixed seat member 14 for fixing the transformer 10 to the equipment is tightened without hindering the work by the inclined portion 53. That is, the worker who tightens the bolt is not hindered by the inclined portion 53 when rotating a wrench or the like, for example. Therefore, it is possible to firmly fix the transformer 10 while reducing the number of working steps.

In one embodiment, the fixed seat member 14 includes a plate member 56. The plate member 56 is inserted between a bolt (not shown) for fixing the transformer 10 to the equipment and the fixed seat member 14. As a result, the force from the bolt is not directly applied to the bottom portion 51 of the fixed seat member 14. Therefore, the strength of the fixed portion including the fixed seat member 14 with the equipment can be increased without increasing the plate thickness of the fixed seat member 14.

(Other embodiments)
In the embodiment, the example in which the support member 15 is arranged between the outer peripheral coil 27 of the coil unit 11 and the iron core 12 has been described. However, the support member 15 may be provided between the inner peripheral side coil 26 of the coil unit 11 and the iron core 12 as long as it does not hinder the flow of air.

Although a plurality of embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are also included in the invention described in the claims and an equivalent range thereof.

In the drawing, 10 is a transformer, 11 is a coil unit, 12 is an iron core, 13 is a frame unit, 14 is a fixed seat member, 15 is a supporting member, 26 is an inner coil, 27 is an outer coil, and 41 is an upper clamp. 42 is a lower clamp, 43 and 44 are side clamps, 45 is a frame part, 51 is a bottom part, 52 is a side part, and 56 is a plate member.

Claims (9)

A tubular coil unit molded with resin,
An iron core that penetrates the coil unit,
A frame unit supporting the coil unit;
It is provided between the axial end of the coil unit and the iron core or the frame unit facing the coil unit, and is in contact with both the coil unit and the iron core or the frame unit, and the iron core and the frame. and a support member to limit the relative movement of the coil unit on the units,
The support members are arranged to form a pair of two in the front-rear direction perpendicular to the axis of the coil unit along the circumferential direction of the coil unit,
One of the supporting members arranged in a pair has an end opposite to the coil unit in contact with the iron core, and the other has an end opposite to the coil unit in contact with the frame unit. Transformer. The coil unit has an inner circumference side coil close to the iron core in the radial direction, and an outer circumference side coil outside the inner circumference side coil,
The transformer according to claim 1, wherein the support member is provided between the outer peripheral coil and the iron core. The coil unit has an inner circumference side coil close to the iron core in the radial direction, and an outer circumference side coil outside the inner circumference side coil,
The transformer according to claim 1, wherein the support member is provided between the outer peripheral side coil and the iron core, and between the inner peripheral side coil and the iron core. The frame unit includes an upper clamp provided on an upper side of the coil unit in a vertical direction, a lower clamp provided on a lower side of the coil unit, and an upper clamp penetrating the coil unit in an axial direction. It has a side clamp that connects with the lower clamp,
4. The transformer according to claim 1, wherein the side clamp has a plate shape bent into an L shape. The frame unit includes an upper clamp provided on an upper side of the coil unit in a vertical direction, a lower clamp provided on a lower side of the coil unit, and an upper clamp penetrating the coil unit in an axial direction. It has a side clamp that connects with the lower clamp,
The said side clamp is a transformer as described in any one of Claim 1 to 3 which has the frame part which protrudes in a frame shape in the connection part with the said lower clamp. The transformer according to any one of claims 1 to 5, further comprising a fixed seat member that is provided below the frame unit in a vertical direction and that is fixed to an external facility. The transformer according to claim 6, wherein the fixed seat member is connected to the frame unit with a plurality of bolts. The fixed seat member,
A bottom contacting the equipment,
A pair of side parts that rise from both ends of the bottom part and whose upper ends are inclined so that the height in the vertical direction becomes higher toward the frame unit,
The transformer according to claim 6 or 7, further comprising: 9. The transformer according to claim 8, wherein the fixed seat member includes a plate member inserted between the bottom portion and a bolt for fixing to the equipment.

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