JPS6125231Y2 - - Google Patents
Info
- Publication number
- JPS6125231Y2 JPS6125231Y2 JP5553981U JP5553981U JPS6125231Y2 JP S6125231 Y2 JPS6125231 Y2 JP S6125231Y2 JP 5553981 U JP5553981 U JP 5553981U JP 5553981 U JP5553981 U JP 5553981U JP S6125231 Y2 JPS6125231 Y2 JP S6125231Y2
- Authority
- JP
- Japan
- Prior art keywords
- iron core
- case
- filling
- filler
- coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 13
- 239000000945 filler Substances 0.000 claims description 7
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920001187 thermosetting polymer Polymers 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
Landscapes
- Insulating Of Coils (AREA)
- Transformers For Measuring Instruments (AREA)
Description
【考案の詳細な説明】
この考案は鉄心にコイルを巻回し充填物でケー
スに固定した変流器に関するものである。[Detailed description of the invention] This invention relates to a current transformer in which a coil is wound around an iron core and fixed to a case with a filling material.
従来の変流器の構造を第１図及び第２図に示
す。図において１は環状の鉄心、２は鉄心１にト
ロイダル状に巻かれた２次コイル、３は環状の中
空部を有するケース、４はコイル２をケース３に
固定するための充填物である。充填物４にはエポ
キシレジンなどの熱硬化性樹脂が使用され、常温
より高い温度で硬化させる。このため充填物は温
度が下るにつれて熱膨張率に従つて収縮する。一
方鉄心１にはケイ素鋼体、ケース３にはアルミ等
が使用される。熱膨張率は充填物４が一番大きく
次にケース３そして鉄心１の順になり、充填物４
とケース３の差は小さいが、充填物４と鉄心１の
差は大きい。このため充填物４が硬化した温度よ
り下ると収縮量は鉄心１より充填物４の方が大き
くなり鉄心１で拘束された充填物４は収縮する事
が出来ず内部応力が高くなる。この内部応力が充
填物４の破壊応力を越えると充填物４にクラツク
が発生する。充填物にクラツクが発生するとコイ
ル２の導体を断線するという事態が生じる。 The structure of a conventional current transformer is shown in FIGS. 1 and 2. In the figure, 1 is an annular iron core, 2 is a secondary coil wound toroidally around the iron core 1, 3 is a case having an annular hollow part, and 4 is a filling for fixing the coil 2 to the case 3. A thermosetting resin such as epoxy resin is used for the filler 4, and is cured at a temperature higher than room temperature. Therefore, as the temperature decreases, the filling contracts according to its coefficient of thermal expansion. On the other hand, the iron core 1 is made of silicon steel, and the case 3 is made of aluminum. The coefficient of thermal expansion is the largest for packing 4, followed by case 3, and then iron core 1.
The difference between case 3 and case 3 is small, but the difference between filling 4 and iron core 1 is large. For this reason, when the temperature drops below the temperature at which the filling material 4 hardens, the amount of shrinkage of the filling material 4 is greater than that of the iron core 1, and the filling material 4 restrained by the iron core 1 cannot contract, resulting in high internal stress. If this internal stress exceeds the breaking stress of the filler 4, a crack will occur in the filler 4. If a crack occurs in the filling, the conductor of the coil 2 may be disconnected.
この考案は上記欠点を除去するためになされた
ものである。 This invention was made to eliminate the above-mentioned drawbacks.
以下、図について説明する。第３図および第４
図において、充填物４はコイル２の内径側のみに
注入する。充填物４とケース３の熱膨張率の差は
小さいので充填物４の内部応力は緩和され、充填
物４のクラツク発生を阻止することができる。 The figures will be explained below. Figures 3 and 4
In the figure, the filler 4 is injected only into the inner diameter side of the coil 2. Since the difference in coefficient of thermal expansion between the filling 4 and the case 3 is small, the internal stress of the filling 4 is relaxed, and the occurrence of cracks in the filling 4 can be prevented.
以上のようにこの考案によれば、充填物４をコ
イル２の内径側のみに注入することによつて、ク
ラツクの発生を阻止できる効果がある。 As described above, according to this invention, by injecting the filler 4 only into the inner diameter side of the coil 2, it is possible to prevent the occurrence of cracks.
第１図は従来の変流器を示す正面図、第２図は
第１図の−線における断面図、第３図はこの
考案の一実施例を示す正面図、第４図は第３図の
−線における断面図である。
図中、１は鉄心、２はコイル、４は充填物であ
る。なお、各図中同一符号は同一又は相当部分を
示す。
Fig. 1 is a front view showing a conventional current transformer, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a front view showing an embodiment of this invention, and Fig. 4 is Fig. 3. FIG. In the figure, 1 is an iron core, 2 is a coil, and 4 is a filling. Note that the same reference numerals in each figure indicate the same or corresponding parts.
Claims (1)
収める環状のケース、このケース内に充填され、
上記鉄心を固定する熱硬化性樹脂からなる充填物
を備えたものにおいて、上記充填物を上記鉄心の
内径側のみに充填したことを特徴とする変流器。 A ring-shaped iron core with a coil wound around it, a ring-shaped case that contains this iron core, and a magnet that is filled in the case.
A current transformer comprising a filler made of a thermosetting resin for fixing the iron core, the filler being filled only on the inner diameter side of the iron core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5553981U JPS6125231Y2 (en) | 1981-04-16 | 1981-04-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5553981U JPS6125231Y2 (en) | 1981-04-16 | 1981-04-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57168225U JPS57168225U (en) | 1982-10-23 |
| JPS6125231Y2 true JPS6125231Y2 (en) | 1986-07-29 |
Family
ID=29852093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5553981U Expired JPS6125231Y2 (en) | 1981-04-16 | 1981-04-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6125231Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0447747Y2 (en) * | 1986-08-25 | 1992-11-11 |
-
1981
- 1981-04-16 JP JP5553981U patent/JPS6125231Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57168225U (en) | 1982-10-23 |
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