JP6613784B2 - Transformer core support structure and core support method - Google Patents

Description

  The present invention relates to a transformer core support structure and a core support method, and more particularly, to a transformer core support structure and a core support method of a transformer including an iron core in which amorphous alloy ribbons are wound in multiple layers.

  The transformer is a device that converts the voltage of AC power using electromagnetic induction, and includes an iron core that forms a magnetic circuit and a winding (coil) that forms an electric circuit. In such a transformer, an electromagnetic steel sheet or an amorphous alloy ribbon is used as the material of the iron core. Further, as a structure of the iron core, a laminated core (also referred to as a stacked core) obtained by laminating these materials or a wound core obtained by winding these materials is employed.

  Conventionally, a transformer using a wound core has been proposed in which a steel fastening band is wound around the outermost periphery of the wound core to tighten the wound core itself and to ensure grounding of the wound core (for example, a patent) Reference 1). In this transformer, the wound iron core is incorporated into a winding (coil), and a steel fastening band is wound around the outermost periphery thereof, and then tightened by a band fitting. Further, grounding is ensured by fixing the ground lead member connected to the common ground conductor together with the fastening band by the band metal fitting.

JP 2000-21642 A

  However, in the transformer described in Patent Document 1, an amorphous alloy ribbon is used as the material of the wound core. Here, the amorphous alloy ribbon has an extremely thin plate thickness and a low rigidity for manufacturing reasons. Therefore, when a tightening band is wound around the outermost periphery and tightened, a great amount of stress (tightening stress) acts on the wound iron core. In this case, there is a problem that a situation in which the magnetic characteristics of the wound iron core deteriorate may occur as a result of local mechanical distortion.

  This invention is made in view of such a problem, and provides the core support structure and the core support method of a transformer which can support a wound core, without deteriorating the magnetic characteristic of a wound core. With the goal.

The transformer core support structure according to the present invention has a wound core in which an opening is formed, a winding into which the wound core is inserted, a frame that accommodates a part of the wound core, and is fixed to the frame. A support member that supports the wound core, and the support member is disposed in the opening of the wound core, and is a transformer core support structure that supports the inner surface of the wound core in surface contact with the wound core ; The support member is disposed in a flat plate portion having a width wider than the width of the wound iron core, and a plurality of plates disposed at positions on the opposite side of the wound iron core with the flat plate portion disposed outside the wound core. And a hanging portion provided at a side edge portion of the flat plate portion .

  In the iron core support structure of the transformer, the support member is preferably disposed in all openings formed in the wound iron core.

  In the iron core support structure of the transformer, the frame includes an upper frame that accommodates an upper end portion of the wound core and a lower frame that accommodates a lower end portion of the wound core, and the support member It is preferable to have an upper support member fixed to the frame and a lower support member fixed to the lower frame.

  In the iron core support structure of the transformer, it is preferable that the support member is fixed to the frame so that a tightening pressure can be adjusted.

  In the iron core support structure of the transformer, it is preferable that a fixing portion arranged on one side in the width direction of the wound core among the plurality of fixing portions is fixed to the frame via an insulating member.

  In the iron core support structure of the transformer, the wound iron core is preferably formed of a wound iron core wound with an amorphous alloy ribbon.

The transformer core support method according to the present invention includes a wound core in which an opening is formed, a winding into which the wound core is inserted, a frame that houses a part of the wound core, and is fixed to the frame. A support member that supports the wound iron core, the support member being disposed at a position outside the wound core in the flat plate portion, a flat plate portion having a width wider than the width of the wound iron core, and the wound iron core A transformer core support method having a plurality of fixed portions arranged at positions opposite to each other with a drooping portion provided on a side edge of the flat plate portion, in the opening of the core winding Arranging the support member, bringing the support member into surface contact with the inner surface of the wound core, and fixing the support member to the frame to support the wound core. Features.

  According to the iron core support structure of a transformer of the present invention, the wound iron core can be supported without deteriorating the magnetic characteristics of the wound iron core.

It is a front view which shows the principal part of the transformer with which the iron core support structure which concerns on this Embodiment is applied. It is explanatory drawing of the support plate which the transformer which concerns on this Embodiment has. It is sectional drawing (FIG. 3A) in the dashed-two dotted line AA shown in FIG. 1, and the enlarged view (FIG. 3B) of the fixing | fixed part of a support plate. It is the schematic diagram which expanded the periphery of the ground plate which the transformer which concerns on this Embodiment has. It is explanatory drawing of the manufacturing process of the transformer which concerns on this Embodiment. It is explanatory drawing of the manufacturing process of the transformer which concerns on this Embodiment. It is explanatory drawing of the manufacturing process of the transformer which concerns on this Embodiment. It is explanatory drawing of the manufacturing process of the transformer which concerns on this Embodiment.

  Hereinafter, a transformer core support structure according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings. In addition, below, the case where the iron core support structure which concerns on this invention is applied to a mold transformer is demonstrated. However, the application target of the iron core support structure according to the present invention is not limited to the mold transformer, and can be appropriately changed. For example, the present invention can be applied to dry transformers other than mold transformers (for example, Class H dry transformers), gas-insulated transformers, and oil-filled transformers.

  FIG. 1 is a front view showing a main part of a transformer to which the iron core support structure according to the present embodiment is applied. A transformer 1 shown in FIG. 1 includes an iron core 10 that forms a magnetic circuit, a winding (coil) 20 that forms an electric circuit, and a frame 30 that houses a part of the iron core 10. FIG. 1 shows a transformer 1 having a three-phase three-leg structure in which a part of an iron core 10 inserted into three windings 20 is fixed to a pair of upper and lower frames 30 (301, 302). In addition, about the structure of the transformer used as the application object of this invention, it is not limited to this, It is applicable to the transformer 1 which has arbitrary structures, such as a 3 phase 5 leg structure.

  The iron core 10 is formed of a wound iron core in which amorphous alloy ribbons are wound in multiple layers and are generally rectangular in a front view. More specifically, the iron core 10 is composed of a wound iron core wound with a 25 μm amorphous alloy ribbon. As shown in FIG. 1, the iron core 10 has a pair of inner iron core portions 101 arranged on the inner side and an outer iron core portion 102 arranged on the outer side (outer peripheral side) of the inner iron core portions 101. . Each inner iron core portion 101 is individually wound with an amorphous alloy ribbon. The outer iron core portion 102 is wound with a magnetic steel sheet with the inner iron core portion 101 disposed inside. Around the outer periphery of the outer iron core portion 102, an electromagnetic steel plate that maintains the shape of the iron core 10 and reinforces the iron core 10 itself is wound.

  An opening 103 is formed at the center of each inner iron core portion 101 constituting the iron core 10. That is, the iron core 10 is formed with a pair of openings 103a and 103b penetrating perpendicularly to the lamination direction of the electromagnetic steel sheets. These openings 103 may be called window portions of the iron core 10. In addition, on the inner periphery of the inner iron core portion 101 and the outer periphery of the outer iron core portion 102, electromagnetic steel plates are disposed to maintain the shape of the iron core 10 and reinforce the iron core 10 itself.

  The winding 20 has, for example, an inner winding 201 and an outer winding 202 (not shown in FIG. 1, refer to FIG. 5), and the entire surface of these windings 20 is covered with resin or an insulating material containing resin. Has been. For example, an epoxy resin excellent in heat resistance and electrical insulation is used as the resin that covers the winding 20. Each of the windings 20 is disposed around the leg portions LG (LG1 to LG3) constituting the iron core 10. These windings 20 are positioned with respect to the frame 30 (301, 302) via a spacer member (not shown).

  The frame 30 has an upper frame 301 and a lower frame 302. The upper frame 301 has a box shape opened to the lower side, and is configured to accommodate the upper end portion of the iron core 10 therein. On the other hand, the lower frame 302 has a box shape opened upward, and is configured to accommodate the lower end portion of the iron core 10 therein. These frames 30 function as a jig when the transformer 1 is assembled, and also protect the iron core 10 and the winding 20 after the assembly is completed.

  A plurality of (four in the present embodiment) support plates 40 are fixed to the frame 30. These support plates 40 are disposed in the opening 103 of the iron core 10 and are fixed to the frame 30 from the inside of the iron core 10. More specifically, these support plates 40 are fixed to the frame 30 in a state where the iron core 10 is supported while being in surface contact with the inner side surface 103 c of the opening 103. These support plates 40 are fixed to a flange portion 30a (see FIG. 3) of the frame 30 described later. These support plates 40 function as an example of a support member that supports the iron core 10.

  The support plate 40 is formed by, for example, punching and bending a metal plate material such as mild steel. In the present embodiment, the support plate 40 includes a pair of upper support plates 41 and 42 and a pair of lower support plates 43 and 44. The pair of upper support plates 41 and 42 are fixed to the upper frame 301. On the other hand, the pair of lower support plates 43 and 44 are fixed to the lower frame 302. Moreover, the upper side support plate 41 and the lower side support plate 43 are arrange | positioned in the opening part 103a. On the other hand, the upper support plate 42 and the lower support plate 44 are disposed in the opening 103b.

  FIG. 2 is an explanatory diagram of the support plate 40 included in the transformer 1 according to the present embodiment. FIG. 2 shows a plan view (FIG. 2A), a side view (FIG. 2B), and a front view (FIG. 2C) of the support plate 40. The upper support plates 41 and 42 and the lower support plates 43 and 44 constituting the support plate 40 have a common configuration.

  As shown in FIG. 2A, the support plate 40 has a flat plate portion 401 that is generally rectangular in plan view. The flat plate portion 401 has tongue pieces 402 formed in the vicinity of the four corners. These tongue pieces 402 constitute a part of the flat plate portion 401, and are formed to extend in the vertical direction of the flat plate portion 401 shown in FIG. 2A. The dimension L1 of the flat plate part 401 (including the tongue piece part 402) is configured to be wider than the dimension L2 in the width direction of the iron core 10 in a side view (see FIG. 3A). That is, the flat plate portion 401 has a width wider than the width of the iron core 10.

  A shaft portion 403 is provided on the upper surface of each tongue piece portion 402. These shaft portions 403 extend in a direction orthogonal to the tongue piece portion 402 (flat plate portion 401) (see FIGS. 2B and 2C). A screw groove (not shown) is formed around these shaft portions 403. In the following, for convenience of explanation, the tongue piece portion 402 extending upward of the flat plate portion 401 shown in FIG. 2A is referred to as a “tongue piece portion 402 a”, and the tongue piece portion 402 extending downward of the flat plate portion 401. Is referred to as "tongue piece 402b". Further, the shaft portion 403 provided on the tongue piece portion 402a is referred to as “shaft portion 403a”, and the shaft portion 403 provided on the tongue piece portion 402b is referred to as “shaft portion 403b”. These shaft portions 403 function as an example of a fixing portion that fixes the support plate 40 to the frame 30.

  A pair of hanging portions 404 is formed on the side edge of the flat plate portion 401. These hanging portions 404 are formed on the side of the flat plate portion 401 where the tongue piece portion 402 is not formed. Each drooping portion 404 extends in a direction orthogonal to the flat plate portion 401 (a direction opposite to the shaft portion 403). The hanging portion 404 is used for positioning the support plate 40 in the horizontal direction (left-right direction shown in FIG. 1A) when the support plate 40 is disposed in the opening 103 of the iron core 10.

  With such a configuration, the support plate 40 is disposed in the opening 103 of the iron core 10 and is fixed to the frame 30 from the inside of the iron core 10. Hereinafter, the fixing mode of the support plate 40 will be described with reference to FIGS. 1 and 3. 3 is a cross-sectional view (FIG. 3A) taken along a two-dot chain line AA shown in FIG. 1 and an enlarged view (FIG. 3B) of a fixed portion of the support plate 40. FIG. 3B shows an enlarged view of the configuration within the two-dot chain line shown in FIG. 3A. In FIG. 3A, the winding 20 is omitted for convenience of explanation.

  As shown in FIG. 3A, a flange portion 30 a is provided at the lower end portion of the upper frame 301 and the upper end portion of the lower frame 302. The flange portion 30a is provided to extend from the lower end portion of the upper frame 301 and the upper end portion of the lower frame 302 to the side shown in FIG. 3A. The lower surface (upper surface) of the flange portion 30a disposed on the opposite side across the iron core 10 is disposed on the same plane. A through hole 30b through which the shaft portion 403 of the support plate 40 is inserted is formed at a predetermined position of the flange portion 30a (see FIG. 3B).

  The upper support plate 42 is disposed in the opening 103 b of the iron core 10 so as to be in surface contact with the inner side surface 103 c of the opening 103 b on the upper surface of the flat plate portion 401. At this time, the upper support plate 42 is disposed such that the shaft portion 403 (403a, 403b) of the tongue piece portion 402 (402a, 402b) is inserted into the through hole 30b of the flange portion 30a. More specifically, the shaft portion 403 is inserted through the through hole 30b in a state where the nut N1 is mounted in the thread groove (see FIG. 3B). Then, a plurality (two in this embodiment) of nuts N2 and N3 are attached to the shaft portion 403 protruding from the through hole 30b. The upper support plate 42 is fixed to the upper frame 301 by tightening these nuts N1 to N3.

  The upper support plate 42 is fixed to the upper frame 301 so that the tightening pressure can be adjusted. In the present embodiment, the upper support plate 42 is fixed using a stud bolt, but is not limited thereto. By fixing the upper support plate 42 so that the tightening pressure can be adjusted with respect to the upper frame 301 in this manner, for example, while allowing a dimensional error such as a plate thickness of the amorphous alloy ribbon constituting the iron core 10, the support plate 40 can support the iron core 10.

  Further, as shown in FIG. 3A, the shaft portions 403a and 403b are disposed at positions outside the iron core 10 in a state of being fixed to the upper frame 30, and are disposed at positions on the opposite side across the iron core 10. . For this reason, the upper support plates 41 and 42 are fixed to the upper frame 301 at a plurality of positions on the outer side of the iron core 10 and sandwiching the iron core 10 via the flat plate portion 401. Thereby, the load which acts on the iron core 10 when it fixes to the upper side frame 301 can be disperse | distributed via the flat plate part 401. FIG. As a result, the iron core 10 can be supported while avoiding local concentration of the load generated when fixed to the upper frame 301.

  Further, of the shaft portions 403 (403a, 403b) inserted through the upper frame 301, the shaft portion 403a disposed on one side (right side) of the iron core 10 in the width direction (left-right direction shown in FIG. 3A). Is fixed to the upper frame 301 via an insulating member. For example, as shown in FIG. 3B, the shaft portion 403a is inserted with the insulating tube IM1 and the insulating washer IM2 interposed between the shaft portion 403a and the insertion hole 30b. By fixing the shaft portion 403a through the insulating member in this way, it is possible to prevent a closed circuit from being formed on the upper support plate 42 and the upper frame 301 in accordance with the current flowing through the winding 10. Thereby, the malfunction (local heating and increase in no-load loss) that may occur when a closed circuit is formed on the upper support plate 42 and the upper frame 301 can be prevented.

  The lower support plate 44 is fixed to the lower frame 302 in the same manner as the upper support plate 42. The method of fixing the lower support plate 44 to the lower frame 302 is the same as that of the upper support plate 42 except that the vertical direction is reversed. For this reason, the fixed state is shown in FIG. Moreover, since the fixing mode of the support plate 40 in the opening 103a of the iron core 10 is the same as the fixing mode in the opening 103b, the description thereof is omitted.

  Returning to FIG. 1, the description of the configuration of the transformer 1 will be continued. As shown in FIG. 1, the ground plate 50 is fixed to the upper frame 301. The ground plate 50 is disposed at a position corresponding to the outer iron core portion 102 constituting the iron core 10 in a front view. More specifically, one end of the ground plate 50 is fixed to the upper frame 301, and the other end is inserted between layers of the amorphous alloy ribbon forming the outer iron core portion 102. Accordingly, the iron core 10 is grounded from the ground plate 50 through the ground terminal provided on the upper frame 301.

  FIG. 4 is an enlarged schematic view of the periphery of the ground plate 50 included in the transformer 1 according to the present embodiment. In FIG. 4, the cross section of the perpendicular direction which passes the grounding board 50 is shown from the side of the transformer 1 (right side shown in FIG. 1). In FIG. 4, only the iron core 10 (the inner iron core portion 101 and the outer iron core portion 102), the upper frame 301, and the grounding components (the ground plate 50 and the fastening bolt 53) are shown for convenience of explanation.

  As shown in FIG. 4, the ground plate 50 has a bent shape in a side view. The ground plate 50 has a fixed piece 51 that extends generally in the vertical direction, and an insertion piece 52 that is bent from the lower end of the fixed piece 51 and extends generally in the horizontal direction. The ground plate 50 is formed by bending a conductive plate material. For example, the ground plate 50 is configured by a brass plate of about 0.2 mm. By comprising a brass plate, the ground plate 50 excellent in processability can be formed. In addition, you may comprise with metal plates other than a brass plate. For example, a stainless plate having the same thickness can be used.

  The fixed piece 51 is fixed to a part of the inner wall surface of the upper frame 301 in the vicinity of the upper end portion thereof. The fixing piece 51 is fixed to a fixing hole (not shown) formed in the upper frame 301 with a fastening bolt 53. The fastening bolt 53 can be made of a conductive material. The fixing hole to which the tightening bolt 53 is fixed may be, for example, a circular shape corresponding to the outer diameter of the shaft portion of the tightening bolt 53, or a long hole shape having a certain length in the horizontal direction. Also good. When the fixing hole has a long hole shape, the fixing hole can be fixed to the upper frame 30 while allowing a slight change in the installation position of the ground plate 50.

  The insertion piece 52 is inserted between the layers of the amorphous alloy ribbon constituting the outer iron core portion 102. The insertion piece 52 is sandwiched between adjacent amorphous alloy ribbons by being inserted between the layers. As will be described in detail later, the insertion piece 52 is inserted between the layers of the amorphous alloy ribbon when the iron core 10 is closed. For example, the insertion piece 52 is inserted to a position near the center of the outer iron core portion 102 in the width direction (left-right direction shown in FIG. 4). By inserting the outer iron core portion 102 to the position near the center in the width direction in this way, the insertion piece 52 can be prevented from falling off and the iron core 10 can be reliably grounded.

  Hereinafter, the process of manufacturing the transformer 1 having the above configuration will be described with reference to FIGS. 5-8 is explanatory drawing of the manufacturing process of the transformer 1 which concerns on this Embodiment. In addition, in the manufacturing process of the transformer 1 shown below, the process before the opening operation of the iron core 10 and the process after the closing operation are omitted for convenience of explanation. 5 to 8, a part of the rail R arranged along the production line of the transformer 1 and a lower surface of the lower frame 302 are provided, and the movement of the transformer 1 on the rail R is illustrated. The moving mechanism M to support is shown.

  In the opening operation of the iron core 10, as shown in FIG. 1, the central portion of the rectangular inner core portion 101 and the outer iron core portion 102 that extends in the horizontal direction above the legs LG <b> 1 to LG <b> 3. Is opened and generally U-shaped in front view (see FIG. 5). In addition, in the manufacturing process shown in FIGS. 5-8, although the case where an overlap system is applied in the opening operation | work and closing operation | work of the iron core 10 is demonstrated, it is not limited to this, A step lap system etc. Other schemes may be applied.

  The opening operation of the iron core 10 is performed in a state where the iron core 10 is fixed to the lower frame 302 (see FIG. 5). In this case, the iron core 10 is fixed to the lower frame 302 via the lower support plates 43 and 44. The lower support plates 43 and 44 are fixed to the lower frame 302 in a state of being in surface contact with the inner surface of the inner iron core portion 101 (the lower inner surface that defines the opening 103) (see FIG. 1). As shown in FIG. 5, the iron core 10 whose opening operation has been completed is in a state in which the inner iron core portion 101 and the outer iron core portion 102 extend upward on the lower frame 302.

  The winding 20 is attached to the iron core 10 so that the iron core 10 (the inner iron core portion 101 and the outer iron core portion 102) thus opened is inserted into the winding wire 20 (iron core insertion step). In this iron core insertion step, the iron core 10 (the inner iron core portion 101 and the outer iron core portion 102) is inserted into the through-hole 203 inside the inner winding 201 constituting the winding 20. Thereby, as shown in FIG. 6, the winding 20 is disposed at a predetermined position on the lower frame 302. At this time, the iron core 10 protrudes upward from the through hole 203 of the winding 20.

  And the upper side support plates 41 and 42 are arrange | positioned so that it may be located between the iron cores 10 which protrude upwards rather than the coil | winding 20 (refer FIG. 7). In this case, the upper support plates 41 and 42 are arranged in a state where the shaft portions 403 (403a and 403b) protrude upward. The upper support plates 41 and 42 are temporarily disposed on a spacer member (not shown). This spacer member is placed on the upper end surface of the winding 20. By mounting on the winding 20 in this manner, the upper support plates 41 and 42 are disposed in the opening 103 of the iron core 10.

  In the state in which the upper support plates 41 and 42 are disposed on the winding 20, as shown in FIG. 7, the inner core portion 101 and the outer core portion 102 disposed on the outer side do not interfere with the closing operation. The outer side of the transformer 1 is bent.

  The inner iron core 101 and the outer iron core 102 bent outward are bent inward, and the inner iron core 101 arranged in the center is bent outward. And these inner side iron core part 101 and the outer side iron core part 102 are closed (closing process). In this closing process, as shown in FIG. 8, the end faces of the amorphous alloy ribbons constituting the inner core portion 101 and the outer core portion 102 are joined. Through this closing process, the iron core 10 returns to the state before opening. In addition, the closing operation | work of this iron core 10 may be called the joining operation | work or rejoining operation | work of the iron core 10.

  In the process of closing the iron core 10, in other words, in the process of joining the amorphous alloy ribbons constituting the iron core 10, the insertion piece 52 of the ground plate 50 is inserted between the layers of the amorphous alloy ribbon (ground plate insertion step). ). In this ground plate insertion step, the insertion piece 52 of the ground plate 50 is inserted between the layers of the amorphous alloy ribbon forming the outer iron core portion 102 (see FIG. 8). The inserted piece 52 is sandwiched between the amorphous alloy ribbon disposed on the lower side by the dead weight of the amorphous alloy ribbon disposed on the upper side while being inserted between the layers. Further, the insertion piece 52 of the ground plate 50 is inserted at a position away from the closing location (joining location) of the outer iron core portion 102. In FIG. 8, for convenience of explanation, the center of the closed portion of the outer iron core portion 102 is indicated by a broken line C.

  Then, after the closing process is completed in a state where the insertion piece 52 of the ground plate 50 is inserted, the upper frame 301 is disposed on the iron core 10. The upper frame 301 is disposed so as to accommodate the upper end portion of the iron core 10 exposed from the winding 20 (see FIG. 1). In this case, the upper frame 301 is disposed on a spacer member (not shown). This spacer member is placed on the upper end surface of the winding 20.

  After the upper frame 301 is disposed, the upper support plates 41 and 42 placed on the upper end surface of the winding 20 are fixed to the upper frame 301. In this case, the upper support plates 41 and 42 are fixed to the upper frame 301 while supporting the iron core 10 from the inside. More specifically, it is fixed to the upper frame 301 in a state where it is in surface contact with and supported by the upper inner surface that defines the opening 103 of the iron core 10 (see FIG. 1).

  Further, the ground plate 50 inserted in the outer iron core portion 102 is fixed to the upper frame 301. In this case, the fixing piece 51 of the ground plate 50 is fixed to the inner wall surface of the upper frame 301 by the fastening bolts 53 (see FIG. 4). Thereby, the iron core 10 and the upper frame 301 are brought into conduction through the ground plate 50, and the iron core 10 is grounded. At this time, since the ground plate 50 is fixed to the upper frame 301, the grounding work at a low position can be avoided, and the work efficiency of the grounding work on the iron core 10 can be improved. Through the series of steps as described above, the transformer 1 according to the present embodiment is completed.

  As described above, in the transformer 1 according to the present embodiment, the iron core 10 has the frame 30 (with the inner surface 103 c supported by surface contact by the support plate 40 disposed in the opening 103. The upper frame 301 and the lower frame 302) are fixed. For this reason, it can prevent that stress concentrates locally in order to support the iron core 10 like the case where the outer periphery of the iron core 10 is wound by the steel fastening band. Thereby, the iron core 10 can be supported without deteriorating the magnetic characteristics of the iron core 10. As a result, it is possible to prevent the generation of excitation sound accompanying the deterioration of the magnetic characteristics in the iron core 10.

  In particular, the support plate 40 is disposed in all the openings 103 formed in the iron core 10. For this reason, since the iron core 10 is supported by the support plate 40 arrange | positioned at all the opening parts 103, the stress which generate | occur | produces in order to support the iron core 10 can be disperse | distributed to multiple places. Thereby, deterioration of the magnetic characteristics in the iron core 10 can be effectively prevented.

  The iron core 10 is fixed to the upper frame 301 by the upper support plates 41 and 42, and is fixed to the lower frame 302 by the lower support plates 43 and 44. Thereby, since the iron core 10 can be fixed to the frame 30 at a plurality of positions arranged vertically, the iron core 10 can be firmly supported while preventing deterioration of the magnetic characteristics of the iron core 10.

  Further, the insertion piece 52 of the ground plate 50 is inserted outside the central portion of the iron core 10 in the stacking direction, more specifically, between the amorphous alloy ribbon layers constituting the outer iron core portion 102. For this reason, since the insertion piece 52 of the ground plate 50 is inserted at a position outside the central portion of the iron core 10 in the stacking direction, the amount of the amorphous alloy ribbon disposed on the ground member can be reduced, and the ground plate It is possible to avoid an excessive load from acting on 50 (insertion piece 52). Thereby, the situation where a load concentrates locally in the iron core 10 due to the insertion of the ground plate 50 can be avoided, and the deterioration of the magnetic characteristics in the iron core 10 can be prevented.

  Further, the insertion piece 52 of the ground plate 50 is inserted between the layers of the amorphous alloy ribbon at a position away from the closed position of the iron core 10. For this reason, the influence of the load which acts on the grounding board 50 with the closing operation | work of the iron core 10 can be reduced. Thereby, the load which acts on the grounding board 50 with a closing operation | work between the transformers 1 from which a manufacturing process differs can be equalize | homogenized, and the grounding performance by the grounding board 50 can be equalized.

  In addition, this invention is not limited to the said embodiment, It can implement variously. In the above-described embodiment, the size, shape, and the like illustrated in the accompanying drawings are not limited thereto, and can be appropriately changed within a range in which the effect of the present invention is exhibited. In addition, various modifications can be made without departing from the scope of the object of the present invention.

  For example, in the above embodiment, the case where the iron core 10 is fixed to the frame 30 by the four support plates 40 (the upper support plates 41 and 42 and the lower support plates 43 and 44) has been described. However, the configuration of the support plate 40 is not limited to this and can be changed as appropriate. For example, one support plate 40 fixed to the upper frame 301 and the lower frame 302 may be provided. That is, the function of the upper support plates 41 and 42 (or the lower support plates 43 and 44) may be provided in the single support plate 40. Even in such a change, the iron core 10 can be supported without deteriorating the magnetic characteristics of the iron core 10 as in the above embodiment.

  Moreover, in the said embodiment, the case where the iron core 10 is fixed to the upper side frame 301 and the lower side frame 302 via the upper side support plates 41 and 42 and the lower side support plates 43 and 44 is demonstrated. However, the manner of fixing the iron core 10 by the support plate 40 is not limited to this and can be changed as appropriate. For example, it is good also as an aspect fixed to the upper flame | frame 301 using only the upper side support plates 41 and 42. FIG.

  Further, in the above embodiment, the case where the iron core 10 is grounded by the ground plate 50 has been described. However, the grounding aspect of the iron core 10 is not limited to this and can be changed as appropriate. For example, the grounding potential may be secured by plating the surface of the support plate 40 and the iron core 10 may be grounded. In this case, since the ground plate 50 can be omitted, the number of parts constituting the transformer 1 can be reduced. Moreover, since the operation | work which inserts the grounding board 50 between the layers of the amorphous alloy ribbon which comprises the iron core 10 can be abbreviate | omitted, the process required for manufacture of the transformer 1 can be simplified.

  According to the iron core support structure of the transformer 1 of the present invention, there is an effect that the iron core can be supported without deteriorating the magnetic properties of the iron core, and in particular, the iron core wound with an amorphous alloy ribbon. It can use suitably for a transformer provided with.

DESCRIPTION OF SYMBOLS 1 Transformer 10 Iron core 101 Inner iron core part 102 Outer iron core part 103, 103a, 103b Opening part 103c Inner side surface 20 Winding 30 Frame 30a Flange part 301 Upper frame 302 Lower frame 40 Support plate 401 Flat plate part 402, 402a, 402b Tongue Pieces 403, 403a, 403b Shaft 404 Hanging parts 41, 42 Upper support plate 43, 44 Lower support plate 50 Ground plate 51 Fixing piece 52 Insertion piece 53 Tightening bolt IM1 Insulating tube IM2 Insulating washer

Claims (7)

A wound core in which an opening is formed, a winding into which the wound core is inserted, a frame that houses a part of the wound core, and a support member that is fixed to the frame and supports the wound core. ,
The support member is disposed in the opening of the wound core, and is a transformer core support structure for supporting the inner surface of the wound core in surface contact with the wound core ;
The support member is disposed in a flat plate portion having a width wider than the width of the wound iron core, and a plurality of plates disposed at positions on the opposite side of the wound iron core with the flat plate portion disposed outside the wound core. A transformer core support structure , comprising: a fixed portion of the flat plate portion; and a hanging portion provided on a side edge portion of the flat plate portion .   The said support member is arrange | positioned in all the opening parts formed in the said wound iron core, The iron core support structure of the transformer of Claim 1 characterized by the above-mentioned. The frame has an upper frame that accommodates an upper end portion of the wound core, and a lower frame that accommodates a lower end portion of the wound core,
3. The transformer core according to claim 1, wherein the support member includes an upper support member fixed to the upper frame and a lower support member fixed to the lower frame. Support structure.   The said support member is fixed so that a clamping pressure can be adjusted with respect to the said flame | frame, The iron core support structure of the transformer in any one of Claims 1-3 characterized by the above-mentioned. Among the plurality of fixing portions, while the fixed portion disposed on the side of the width direction of the wound core are both of claims 1 to 4, characterized in that fixed to the frame via an insulating member core support structure of the transformer crab according. The transformer core support structure according to any one of claims 1 to 5 , wherein the wound iron core is formed of a wound iron core wound with an amorphous alloy ribbon. A wound core in which an opening is formed, a winding into which the wound core is inserted, a frame that houses a part of the wound core, and a support member that is fixed to the frame and supports the wound core. ,
The support member is disposed in a flat plate portion having a width wider than the width of the wound iron core, and a plurality of plates disposed at positions on the opposite side of the wound iron core with the flat plate portion disposed outside the wound core. A winding core support method of a transformer having a fixed portion and a hanging portion provided on a side edge portion of the flat plate portion ,
Placing the support member in the opening of the wound core;
Bringing the support member into surface contact with the inner surface of the wound core;
Fixing the support member to the frame and supporting the wound iron core;
A method for supporting an iron core of a transformer, comprising:

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