TW201801104A - Structure of iron core joint portion of electromagnetic device - Google Patents

Abstract

The present invention provides a structure for reducing loss that occurs in a fastening metal fitting, without increasing the height of an iron core. As a means for solving the problem, according to the present invention, a stacked core of a stationary induction electric device comprises stacked layers of electromagnetic steel sheets or amorphous ribbons, and is characterized in that a maximum size in the horizontal direction of a cross section of a yoke arranged in the horizontal direction on an upper part of the iron core is greater than a maximum size in the horizontal direction of a cross section of a leg in the vertical direction on which a core winding wire is wound.

Description

電磁機器的鐵心接合部構造 Core joint structure of electromagnetic machine

本發明有關電磁機器中，特別是靜止感應機器的鐵心構造。 The present invention relates to a core structure of an electromagnetic machine, particularly a stationary induction machine.

靜止感應機器乃是利用磁場的作用，經由調整阻抗的電抗器或磁的耦合，變更電壓之機器。此乃是大量用鐵心與繞線所構成。鐵心係根據磁通密度與剖面積，與繞線的捲繞數等基本的規格成關係之部位。作為其構造材，係利用有電磁鋼板或磁性薄帶。材質係根據用途靈活運用，例如，被利用到變電所的變壓器或桿上變壓器等的電力用變壓器係利用層疊了電磁鋼板或鐵系的非晶質之構造的鐵心者。在內鐵型的變壓器中，把配置在鐵心的上部及下部的水平方向的部位稱為上部及下部軛，把垂直配置繞線在繞線的軸方向的部位稱為腳。鐵心係作為構造體，為了保持形狀，具有鎖緊上部及下部軛之金屬製的鎖緊用金屬具、或連結到雙方的鎖緊用金屬具之無頭螺栓、其他設在鐵心下部之金屬具等。特別是，鎖緊用金屬具係位置在繞線的軸方向的上下處，因為作用有從繞線所發生的交流磁通(以下，記為漏磁通)，因電磁感應的作用，在金屬具內部發生電流(以 下，記為渦電流)。因為該電流，鎖緊用金屬具係發生焦耳熱損，招致效率的惡化。為此，有關變壓器的低損失化方面，要在抑制在鎖緊用金屬具的焦耳熱損方面下功夫。 The static induction machine is a machine that changes the voltage by using the action of a magnetic field and adjusting the impedance through a reactor or magnetic coupling. This is composed of a large number of cores and windings. The core is a part that is related to basic specifications such as the number of windings based on the magnetic flux density and the cross-sectional area. As its structural material, an electromagnetic steel plate or a magnetic strip is used. The material is flexibly used according to the application. For example, a power transformer such as a transformer used in a substation or a pole-mounted transformer is a core made of an amorphous structure laminated with an electromagnetic steel plate or an iron system. In the inner-iron type transformer, the horizontally disposed portions on the upper and lower portions of the core are referred to as upper and lower yokes, and the vertically disposed portions of the winding in the axial direction of the winding are referred to as feet. The iron core is used as a structural body. In order to maintain the shape, it has metal locking metal fittings for locking the upper and lower yokes, or headless bolts connected to both locking metal fittings, and other metal fittings provided under the iron core. Wait. In particular, the locking metal fixtures are positioned above and below the axis of the winding because AC magnetic flux (hereinafter, referred to as leakage magnetic flux) generated from the winding acts on the metal due to the effect of electromagnetic induction on the metal. With internal current (to (Hereinafter referred to as eddy current). Due to this current, Joule heat loss occurs in the metal fittings for locking, resulting in deterioration of efficiency. For this reason, in order to reduce the loss of the transformer, efforts must be made to suppress the Joule heat loss of the metal fittings for locking.

作為先前技術，日本特開2014-216524號專利公報(專利文獻1)是廣為人知的。在專利文獻1，提案有經由在鎖緊用金屬具與線圈之間放入磁性材的塊狀體，形成朝鐵心側的磁路的方式，達成使來自繞線的漏磁通不會朝鎖緊用金屬具進入的構造。經此，抑制在鎖緊用金屬具的損失發生。 As a prior art, Japanese Patent Application Laid-Open No. 2014-216524 (Patent Document 1) is widely known. Patent Document 1 proposes a method of forming a magnetic circuit toward the core side through a block body in which a magnetic material is interposed between a locking metal tool and a coil, so that the leakage magnetic flux from the winding is not directed toward the lock. Structure to enter with metal fittings tightly. As a result, the occurrence of a loss in the locking metal fixture is suppressed.

[先前技術文獻] [Prior technical literature]

[專利文獻] [Patent Literature]

[專利文獻1]日本特開2014-216524號專利公報 [Patent Document 1] Japanese Patent Laid-Open No. 2014-216524

但是於在繞線與鎖緊用金屬具之間配置磁性材的塊狀體的情況下，是有必要確保配置該磁性材的塊狀體之空間，有鐵心的高度變高的問題。在此，在本發明，提供有不用增高鐵心的高度，且減低在鎖緊用金屬具發生的損失之構造。 However, when a block of a magnetic material is arranged between a winding and a metal fixture for locking, it is necessary to secure a space where the block of the magnetic material is arranged, and there is a problem that the height of the core becomes high. Here, in the present invention, there is provided a structure that does not increase the height of the core and reduces the loss that occurs in the metal fittings for locking.

為了解決上述課題，本發明係利用有一種鐵心構造，在成為捲繞了繞線的鐵心範圍的腳、與配置在 水平方向的軛中，該軛的剖面形狀比起該腳的剖面形狀，在水平方向為長。經此，因為在繞線上部配置軛，可以減低在鎖緊用金屬具發生的損失。 In order to solve the above-mentioned problems, the present invention utilizes a core structure. In the horizontal yoke, the cross-sectional shape of the yoke is longer in the horizontal direction than the cross-sectional shape of the leg. As a result, the yoke is arranged at the upper portion of the winding wire, so that the loss occurring in the metal fixture for locking can be reduced.

根據本發明，利用在成為捲繞了繞線的鐵心範圍的腳、與配置在水平方向的軛中，該軛的剖面形狀比起該腳的剖面形狀，在水平方向為長這樣的特徵的鐵心構造，具有減低在鎖緊用金屬具發生的損失的效果。 According to the present invention, an iron core having a characteristic that the cross-sectional shape of the yoke is longer in the horizontal direction than the cross-sectional shape of the leg is used in the leg that is in the range of the core around which the winding is wound, and the yoke that is arranged in the horizontal direction The structure has the effect of reducing the loss occurring in the metal fittings for locking.

1‧‧‧鐵心 1‧‧‧ Iron core

2‧‧‧低壓繞線 2‧‧‧ low voltage winding

3‧‧‧高壓繞線 3‧‧‧ high voltage winding

4‧‧‧鎖緊用金屬具 4‧‧‧ metal fittings for locking

5‧‧‧絕緣物 5‧‧‧ insulator

6‧‧‧剛性高的零件 6‧‧‧ Highly rigid parts

7‧‧‧壓固螺栓 7‧‧‧ compression bolt

11‧‧‧上部軛 11‧‧‧ Upper yoke

12‧‧‧下部軛 12‧‧‧ lower yoke

13‧‧‧腳 13‧‧‧ feet

20‧‧‧槽 20‧‧‧slot

21‧‧‧槽蓋 21‧‧‧Slot cover

22‧‧‧漏磁通 22‧‧‧ leakage flux

30‧‧‧絕緣物的塊狀體 30‧‧‧ block of insulator

[圖1]為表示本發明的型態之說明圖。 FIG. 1 is an explanatory diagram showing a mode of the present invention.

[圖2]為本發明的型態的鐵心的說明圖。 Fig. 2 is an explanatory diagram of an iron core according to a mode of the present invention.

[圖3]為習知的鐵心的說明圖。 Fig. 3 is an explanatory diagram of a conventional iron core.

[圖4]為習知的鐵心及周邊構造的說明圖。 [Fig. 4] Fig. 4 is an explanatory diagram of a conventional iron core and a surrounding structure.

[圖5]為習知的鐵心及周邊構造的說明圖。 FIG. 5 is an explanatory diagram of a conventional iron core and its surrounding structure.

[圖6]為表示本發明的第2實施方式之說明圖。 FIG. 6 is an explanatory diagram showing a second embodiment of the present invention.

以下，說明有關本發明的實施例。 Examples of the present invention will be described below.

[實施例1] [Example 1]

一開始，說明有關變壓器的構造。於圖3表示變壓器的鐵心。變壓器的鐵心40係層疊電磁鋼板或非晶質薄帶而形成。把配置在鐵心的上部及下部的水平方向的部分稱為上部軛41及下部軛43，把垂直配置繞線 在繞線的軸方向的部分稱為腳43。於圖4表示變壓器的構造。變壓器，係在層疊了電磁鋼板或非晶質薄帶所形成的鐵心14，捲繞低壓繞線15及高壓繞線16。尚且，繞線係雖未圖示，由低壓繞線、高壓繞線、抽頭繞線(tapped coil）等2個以上所構成者。於鐵心，為了保持形狀，設有鎖緊用金屬具17。該鎖緊金屬具17，係配置成壓縮在鐵心14的上部軛的層疊方向。而且，作為保持繞線15及16的構造，在繞線上部及下部配置絕緣物18，介隔著金屬等的剛性高的零件20，利用有設在鎖緊用金屬具17的壓固螺栓19。把如此構成的鐵心14、繞線15及16放入到槽20，使其含浸到油，用槽蓋21蓋上。 Initially, the structure of the transformer will be explained. The core of the transformer is shown in FIG. 3. The core 40 of the transformer is formed by laminating electromagnetic steel plates or amorphous ribbons. The horizontally arranged portions on the upper and lower portions of the core are referred to as the upper yoke 41 and the lower yoke 43, and the wires are vertically arranged. The part in the axial direction of the winding is called a foot 43. The structure of the transformer is shown in FIG. 4. The transformer is wound on a core 14 formed by stacking electromagnetic steel plates or amorphous ribbons, and winding a low-voltage winding 15 and a high-voltage winding 16. In addition, although the winding system is not shown, it is composed of two or more of a low-voltage winding, a high-voltage winding, and a tapped coil. In order to maintain the shape, the iron core is provided with a locking metal tool 17. The locking metal tool 17 is arranged so as to be compressed in the stacking direction of the upper yoke of the core 14. In addition, as a structure for holding the windings 15 and 16, an insulator 18 is disposed at the upper and lower portions of the winding, and a fixing bolt 19 provided in a locking metal tool 17 is used through a rigid component 20 such as a metal. . The iron core 14 and the windings 15 and 16 thus constructed are put into the groove 20, impregnated with oil, and covered with the groove cover 21.

接著，說明有關在鎖緊用金屬具17發生的損失。在如以上般構成的變壓器的繞線15及16流動有電流的話，發生漏磁通21。漏磁通21，係擴散在空間，於金屬物發生因電磁感應的法則所致之渦電流。該渦電流所致之焦耳熱損成為變壓器的損失之1要因。特別是鎖緊用金屬具17，乃是靠近繞線的構造物，大大受到其影響，所以如圖5所表示，進行對策。對策方面，在鎖緊用金屬具32與配置在繞線的上下的零件31之間，設有磁性材料之塊狀體30。關於該塊狀體30，一般是層疊矽鋼板而構成者。經由這樣的構造，從繞線33及34所發生的漏磁通35，係不會到達鎖緊用金屬具32，而流入到鐵心36。亦即，可以抑制在鎖緊用金屬具32發生的損失。 Next, a description will be given of a loss occurring in the locking metal tool 17. When a current flows through the windings 15 and 16 of the transformer configured as described above, a magnetic flux leakage 21 occurs. The leakage magnetic flux 21 is diffused in space, and an eddy current caused by a rule of electromagnetic induction occurs in a metal object. The Joule heat loss caused by this eddy current becomes a factor of the transformer loss. In particular, the locking metal tool 17 is a structure that is close to the winding and is greatly affected by it. Therefore, as shown in FIG. 5, measures are taken. As a countermeasure, a block 30 made of a magnetic material is provided between the locking metal tool 32 and the upper and lower parts 31 arranged on the winding. The bulk body 30 is generally formed by laminating silicon steel plates. With this structure, the leakage magnetic flux 35 generated from the windings 33 and 34 does not reach the locking metal fixture 32 and flows into the iron core 36. That is, it is possible to suppress a loss occurring in the locking metal tool 32.

接著在圖1及圖2表示本發明的第1實施方式。圖1為第一實施方式的說明圖。本實施例，係不增 加鐵心的高度且減低鎖緊金屬具的損失之構造。鐵心1，係層疊方向的幅寬在上部軛50與腳51為相異。具體方面，上部軛的層疊方向的厚度L1與腳的L2，為(1)式之關係。尚且，雖未圖示，也就有關鐵心的下部軛，是以與上部軛50同樣的L1形成層疊方向的幅寬。 Next, a first embodiment of the present invention is shown in Figs. 1 and 2. FIG. 1 is an explanatory diagram of the first embodiment. This embodiment is not increased A structure that increases the height of the iron core and reduces the loss of the locking hardware. The width of the iron core 1 in the stacking direction is different in the upper yoke 50 and the leg 51. Specifically, the thickness L1 in the stacking direction of the upper yoke and the L2 of the leg are in a relationship of the formula (1). In addition, although not shown, the lower yoke of the iron core has a width in the lamination direction formed by the same L1 as the upper yoke 50.

L1>L2…(1) L1> L2 ... (1)

經此，成為上部軛50存在於繞線2及3的上部之構造。在繞線2及3的上部，配置絕緣物5與剛性高的零件6。剛性高的零件6係以設在上部軛的鎖緊用金屬具4的壓固螺栓7來保持繞線。以這樣的構造，以繞線2及3所發生的漏磁通，係可以直接流入到鐵心1。尚且，雖未圖示，關於鐵心1的下部軛也是同樣的構造。圖2係表示3相器的鐵心構造。如上述般，該鐵心10，係上部軛11及下部軛12的層疊方向的幅寬L1與腳13的層疊方向的幅寬L2之關係是與(1)式同樣。尚且，有關三相5腳器及單相器的構造也是同樣。 As a result, the structure in which the upper yoke 50 exists in the upper part of the windings 2 and 3 is formed. On the upper part of the windings 2 and 3, an insulator 5 and a component 6 having high rigidity are arranged. The high-rigidity component 6 is held by the compression bolt 7 of the locking metal tool 4 provided on the upper yoke. With such a structure, the leakage magnetic flux generated by the windings 2 and 3 can flow directly into the core 1. Although not shown, the lower yoke of the iron core 1 has the same structure. Fig. 2 shows the core structure of a three-phase device. As described above, the relationship between the width L1 of the lamination direction of the upper yoke 11 and the lower yoke 12 of the iron core 10 and the width L2 of the lamination direction of the legs 13 is the same as the expression (1). The same applies to the structure of the three-phase 5-pin device and the single-phase device.

在構成以上般的本實施方式中，以上述圖1及圖2的構造，習知的構造也就是圖5的磁性體的塊狀體30係可以為非必要的緣故，可以削減配置有磁性體的塊狀體30的空間。其結果，可以提供可以降低鐵心的高度方向的尺寸之鐵心構造。 In the present embodiment configured as described above, with the structure of FIGS. 1 and 2 described above, the conventional structure, that is, the magnetic block 30 of FIG. 5, may be unnecessary, and the arrangement of the magnetic body may be reduced. Space for the massive body 30. As a result, it is possible to provide a core structure capable of reducing the size in the height direction of the core.

[實施例2] [Example 2]

接著，於圖6表示本發明的第2實施方式。本實施例係與第1實施方式相比，鐵心的構造為相異 者。把從繞線61及62所發生的漏磁通吸收到鐵心60之上部軛63的體積，係上部軛63中上部範圍的效果為小的緣故，可以在該範圍設有絕緣物64。在繞線61及62的上部，配置絕緣物67與剛性高的零件68。剛性高的零件68係以設在上部軛的鎖緊用金屬具65的壓固螺栓69來保持繞線61及62。該情況下，把上部軛63的層疊方向的幅寬為最大的部位作為L1，與腳的層疊方向的幅寬L2的關係，是與(1)式同樣的。以這樣的構造，可以減少矽鋼板的量。 Next, a second embodiment of the present invention is shown in FIG. 6. This example is different from the first embodiment in the structure of the iron core By. The effect of absorbing the leakage magnetic flux generated from the windings 61 and 62 to the volume of the upper yoke 63 above the iron core 60 is small, and an insulator 64 may be provided in this range. On the upper portions of the windings 61 and 62, an insulator 67 and a highly rigid component 68 are arranged. The high-rigidity component 68 holds the windings 61 and 62 with a compression bolt 69 of a lock metal 65 provided on the upper yoke. In this case, the position where the width in the stacking direction of the upper yoke 63 is the largest is L1, and the relationship with the width L2 in the stacking direction of the feet is the same as that in the formula (1). With such a structure, the amount of silicon steel sheet can be reduced.

在構成以上般的本實施方式中，以上述圖1及圖2的構造，習知的構造也就是圖5的磁性體的塊狀體30係可以為非必要的緣故，可以削減配置有磁性體的塊狀體30的空間。其結果，可以提供可以降低鐵心的高度方向的尺寸之鐵心構造。 In the present embodiment configured as described above, with the structure of FIGS. 1 and 2 described above, the conventional structure, that is, the magnetic block 30 of FIG. 5, may be unnecessary, and the arrangement of the magnetic body may be reduced. Space for the massive body 30. As a result, it is possible to provide a core structure capable of reducing the size in the height direction of the core.

1‧‧‧鐵心 1‧‧‧ Iron core

2‧‧‧低壓繞線 2‧‧‧ low voltage winding

3‧‧‧高壓繞線 3‧‧‧ high voltage winding

4‧‧‧鎖緊用金屬具 4‧‧‧ metal fittings for locking

5‧‧‧絕緣物 5‧‧‧ insulator

6‧‧‧剛性高的零件 6‧‧‧ Highly rigid parts

7‧‧‧壓固螺栓 7‧‧‧ compression bolt

50‧‧‧上部軛 50‧‧‧ Upper yoke

51‧‧‧腳 51‧‧‧ feet

Claims (3)

一種變壓器鐵心構造，係層疊了靜止感應電器的電磁鋼板或是非晶質薄帶之層積鐵心中，配置在鐵心的上部的水平方向之鐵心軛的剖面的水平方向的最大尺寸，係比起捲繞鐵心的繞線之垂直方向的鐵心腳的剖面的水平方向的最大尺寸，還大。 A transformer core structure, which is the largest horizontal dimension of the cross section of the horizontal core yoke arranged in the upper part of the core of the laminated steel core of the static induction electrical appliance or the laminated thin core of the amorphous ribbon, is compared with the roll The maximum dimension in the horizontal direction of the cross section of the core leg in the vertical direction of the winding around the core is also large. 如請求項1的變壓器鐵心構造，其中，從前述鐵心腳的最大尺寸，在大的軛的範圍中，在軛的上部包含有絕緣物。 The transformer core structure according to claim 1, wherein an insulator is included in the upper part of the yoke from the maximum size of the core leg in the range of the large yoke. 一種變壓器鐵心構造，係具有：保持如請求項2記載的變壓器鐵心構造與前述鐵心軛之鎖緊用金屬具、配置在設在該鎖緊用金屬具的繞線上部之絕緣物、以及用於按壓該絕緣物之施壓零件。 A transformer core structure comprising: a metal fixture for locking a transformer core structure according to claim 2 and the core yoke; an insulator disposed on a winding portion provided on the metal fixture for locking; Press the pressing part of the insulator.