JPS59108302A - Electric device - Google Patents
Electric deviceInfo
- Publication number
- JPS59108302A JPS59108302A JP21867382A JP21867382A JPS59108302A JP S59108302 A JPS59108302 A JP S59108302A JP 21867382 A JP21867382 A JP 21867382A JP 21867382 A JP21867382 A JP 21867382A JP S59108302 A JPS59108302 A JP S59108302A
- Authority
- JP
- Japan
- Prior art keywords
- melting point
- point metal
- current
- low melting
- low
- 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.)
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Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
この発明は通電体に過大な電流が流れたとき、その温度
上昇による周辺への悪影響を防止するようにした電気装
置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrical device that prevents an adverse effect on the surrounding area due to a rise in temperature when an excessive current flows through a current-carrying body.
一般に、サイリスタを使用した高電圧の電力変換装置に
おいては、通常の動作電圧を考慮して素子の直列個数が
決定される。そして、散発的に印加される雷インパルス
や、開閉サージ等はアレスタで所定の電圧に制限してい
る。Generally, in a high-voltage power converter using a thyristor, the number of elements connected in series is determined in consideration of the normal operating voltage. Sporadically applied lightning impulses, switching surges, etc. are limited to a predetermined voltage by arresters.
従来のものは第1図に示すように、各サイリスク素子(
TI)(Tり(Ts)にアレスタ(A、 )(AI )
(As )及びスナバ回路(St)(謁)(Sl)が並
列に接続されている。As shown in Fig. 1, the conventional type has each cyrisk element (
TI) (Ts) Arrester (A, ) (AI)
(As) and a snubber circuit (St) (audience) (Sl) are connected in parallel.
この場合、各サイリスク素子(TI)(Tり(TI)に
は外部から爾インパルス等の過電圧が印加された場合も
、並列に接続されたアレスター(At)(AI)(AI
)及びスナバ回路(81)(Sり(SS)により、制限
された電圧VMLか印加しないため、各サイリスタ素子
(T1)(’r、)(’rs)は保護される。In this case, even if an overvoltage such as an impulse is applied from the outside to each thyrisk element (TI), the arrester (At) (AI) (AI) connected in parallel will
) and the snubber circuit (81) (SS), each thyristor element (T1) ('r, ) ('rs) is protected because the limited voltage VML is not applied.
しかし、各サイリスタ(TI)(Tり(Tl)に導通指
令が出たとき、点弧回路の故障によって、サイリスク素
子(T1)のみが導通しなかったとすると、サイリスク
素子(T1)を残して他のサイリスタが導通し、サイリ
スタ素子(T、)と並列に接続されたアレスター(A1
)には外部回路条件で決まる負荷電流が強制的に流れ、
その端子電圧はアレスター(A1)の電圧−電流特性に
よって決まる値となる。However, when a conduction command is issued to each thyristor (TI) (Tl), if only the thyristor (T1) does not conduct due to a failure in the ignition circuit, the other thyristors (TI) and other thyristors (T1) do not conduct. The thyristor conducts and the arrester (A1) connected in parallel with the thyristor element (T,)
), the load current determined by the external circuit conditions is forced to flow,
The terminal voltage has a value determined by the voltage-current characteristics of the arrester (A1).
通常、アレスタは負荷電流のような過大な電流を長時間
流す能力をもっていないので、過熱して周辺に熱的な悪
影榔を及ぼすことになる。さらに、過熱して機械的な破
壊を起こすと、飛散した破片で周辺を損傷することがあ
るので、第2図で示すように、アレスタに過大な電流が
流れたら、アレスタの両端を電気的に接続するように構
成されたものが提案されている。Generally, arresters do not have the ability to carry large currents such as load currents for long periods of time, so they overheat and cause adverse thermal effects on the surrounding area. Furthermore, if the arrester overheats and mechanically breaks, the surrounding area may be damaged by flying debris, so as shown in Figure 2, if an excessive current flows through the arrester, connect both ends of the arrester electrically. It has been proposed that the device be configured to connect.
すなわち、第2図では、酸化亜鉛形アレスタなどの過電
圧制限要素(3)に半田などの低融点金R(4)を当接
させ、一対の電極(1) (2)間に過電圧制限要素(
3)と低融点金属(4)とを電気的に直列接続し、低融
点金属(4)と密着された導電性のプレート(9)を介
してばネQG チ一方ノjl! i (1) ニ押圧し
、他方(7)l! aii (2)とはシャン) Ql
)で接続し、溶融した低融点金属(4)で両通電部(1
1)(2!l)が電気的に接続されるように、対向した
両通電部(1!1)(211)が低融点金属(4)の下
部に配置しである。That is, in FIG. 2, a low melting point gold R (4) such as solder is brought into contact with an overvoltage limiting element (3) such as a zinc oxide type arrester, and the overvoltage limiting element (3) is placed between a pair of electrodes (1) and (2).
3) and a low melting point metal (4) are electrically connected in series, and a spring QG is connected via a conductive plate (9) that is in close contact with the low melting point metal (4). i (1) Press 2 and press the other (7) l! aii (2) is Shan) Ql
) and connect both current-carrying parts (1) with molten low melting point metal (4).
1) (2!l) are electrically connected to each other, the opposing current-carrying parts (1!1) (211) are arranged under the low melting point metal (4).
上記構成において、過電圧制限要素(3)に過大な電流
が流れる場合、電極(1)−過電圧制限要素(3)−低
融点金属(4)−シャントαη−電ai (2)の回路
を通る。In the above configuration, when an excessive current flows through the overvoltage limiting element (3), it passes through the circuit of electrode (1) - overvoltage limiting element (3) - low melting point metal (4) - shunt αη - electric ai (2).
これによって、過電圧制限要素(3)の温度が上昇する
ので、低融点金属(4)が溶融して両通電部(1a)(
21)間に落下し、両電極(1) (2)間が電気的に
接続される。したがって、過電圧制限要素(3)に流れ
ていた電流は、両通電部(1s+)(2a)間に落下し
た低融点金属(4)を経由して流れるので、過電圧制限
要素(3)の過熱が抑制できる。As a result, the temperature of the overvoltage limiting element (3) increases, so the low melting point metal (4) melts and both current-carrying parts (1a) (
21), and the two electrodes (1) and (2) are electrically connected. Therefore, the current that was flowing through the overvoltage limiting element (3) flows through the low melting point metal (4) that has fallen between the two current-carrying parts (1s+) (2a), which prevents overheating of the overvoltage limiting element (3). It can be suppressed.
しかし、過電圧制限要素の一部が電気的に破壊してそこ
に過大な電流が集中した場合には、その近傍の低融点金
属は瞬時に溶融して落下するが、電流が集中した個所に
よって低融点金属の溶融量が異なるので、両通電部の接
続が不安定であるという欠点があった。However, if a part of the overvoltage limiting element electrically breaks down and excessive current concentrates there, the low melting point metal in the vicinity will instantly melt and fall, but the Since the melting amounts of the melting point metals were different, there was a drawback that the connection between the two current-carrying parts was unstable.
この発明は、上記欠点を解消するためになされたもので
、低融点金属に電極と過電圧制限要素などの通電体との
間に所定の間隔を保持する間隔部材を埋設し、所定の比
抵抗及び融点を有する無機質繊維を所定の大きさの目に
編んだ囲続部材で包み多量の溶融した低融点金属をw1
電極に落下させるようにした電気装置を提供する。This invention was made to eliminate the above-mentioned drawbacks, and includes a spacing member that maintains a predetermined distance between an electrode and a current-carrying body such as an overvoltage limiting element embedded in a low-melting point metal, and a predetermined resistivity and a predetermined resistivity. W1 wraps a large amount of molten low melting point metal with a surrounding member made of inorganic fibers having a melting point woven into meshes of a predetermined size.
To provide an electrical device that is dropped onto an electrode.
以下図について説明する。第8図に詔いて、(1)は第
1の通電部(1a)を有する第1の電極、(2)は第1
の通電部(1a)と所定の間隔をあけて対向した第2の
通電部(2a)を有する第2の11極、(8)は酸化亜
鉛素子などの過電圧制限要素などからなる通電体、(4
)は第2の電極(2)と通電体(3)間に配置されたは
んだなどの低融点金属、(5)は低融点金属(4)に埋
設され第2の電極(2)と通電体(3)との間隔を維持
する間隔部材、(6)は両端がそれぞれ第2の電極(2
)と通電体(3)とに固着され低融点金属(3)を囲続
する部材で、囲繞部材(6)はセラミックスファイバ等
の高融点、高抵抗の無機質繊維を所定の大きさの網目に
編んで構成されている。(7)は第1の電極(1)と通
電体(3)間に配置された通電可能なばね、(8)は通
電体(3)が収納される各型aii (1) (2)が
保持された絶縁筒で、両通電部(la)<2m)の下部
と当接し溜り部(7a)を構成している。このように構
成されたものは、第1の電ai (1)と第2の電極(
2)間が電気的に接続されている。The figures will be explained below. Referring to FIG. 8, (1) is a first electrode having a first current-carrying part (1a), (2) is a first electrode having a first current-carrying part (1a),
A second 11-pole having a second current-carrying part (2a) facing the current-carrying part (1a) of 4
) is a low melting point metal such as solder placed between the second electrode (2) and the current carrying body (3), and (5) is embedded in the low melting point metal (4) and is connected between the second electrode (2) and the current carrying body. (3), and (6) have both ends connected to the second electrode (2).
) and the current carrying body (3) to surround the low melting point metal (3).The surrounding member (6) is made by forming a mesh of a predetermined size with high melting point, high resistance inorganic fibers such as ceramic fibers. It is composed of knitting. (7) is a energized spring placed between the first electrode (1) and the current carrying body (3), and (8) is the spring for each type aii (1) (2) in which the current carrying body (3) is housed. The held insulating cylinder constitutes a reservoir part (7a) that comes into contact with the lower part of both current-carrying parts (la)<2m). The device configured in this way has a first electrode ai (1) and a second electrode (
2) They are electrically connected.
つぎに動作を説明する。第8図において、通電体(3)
に過大な電流が流れ温度が上昇すると、低融点金属(4
)が通電体(3)と接触した側から順次溶融し、表面張
力の関係で囲続部材(6)の網目によって短時間保持さ
れ、溶融量の増大による圧力の増加で、液滴となって網
目から落下するので、溜り部(8a)は多量の溶融した
低融点金属(4)で充たされるため、両通電部(1g)
(2m)間の通電容量が確保される。Next, the operation will be explained. In Figure 8, current carrying body (3)
When an excessive current flows through the metal and the temperature rises, the low melting point metal (4
) melts sequentially from the side that comes into contact with the current-carrying body (3), is held for a short time by the mesh of the surrounding member (6) due to surface tension, and as the pressure increases due to the increase in the amount of melting, it becomes droplets. Since it falls through the mesh, the pool part (8a) is filled with a large amount of molten low melting point metal (4), so both current-carrying parts (1g)
(2m) current carrying capacity is ensured.
発明者は第8図のものを次のようlこ構成して所定の機
能を発揮することを確認した。The inventor has confirmed that the device shown in FIG. 8 is constructed as follows and exhibits the desired function.
すなわち、通電体(3)に酸化面船形バリスタ(600
人で約70)、低融点金属(4)にpb−sn共品はん
だ、囲続部材(6)には市販のセラミックスファイバ平
織クロス0.45m厚さから、適宜目を粗くしたもの、
あるいはファイバー材を手編みしたもの等を用いた。That is, the oxidized surface boat-shaped varistor (600
70), low melting point metal (4) is solder with PB-SN, and surrounding member (6) is a commercially available ceramic fiber plain weave cloth 0.45m thick, coarsened as appropriate.
Alternatively, hand-knitted fiber materials were used.
このように構成したものに、600A、5.5mgのパ
ルスを16.6mg毎に通電した場合、上記の動作によ
って再通電部(la)(2m)間の通電容量が確保され
た。なお、囲続部材(6)の編目は0.1〜0.5mg
の目の粗さとなるときに最も安定した閉路条件が得られ
た。When a pulse of 600 A and 5.5 mg was applied every 16.6 mg to the device configured in this way, the above operation ensured the current carrying capacity between the re-energizing parts (la) (2 m). In addition, the mesh of the surrounding member (6) is 0.1 to 0.5 mg.
The most stable closed circuit conditions were obtained when the mesh was coarse.
上記実施例では、低融点金属にpb−sn共品はんだを
用いたが、pb、Sn、B1等の純金属、pb−5u−
8b、pb−8n−Bi、その他ウッドメタル等の合金
を用いてもよく、セラ之ツクファイバーの代りに、グラ
スファイバーやカーボンファイバーを、それぞれ容量に
応じて必要とされる特性を有するものから選んで用いて
も、上記実施例と同様の効果を期待することができる。In the above example, pb-sn solder was used as the low melting point metal, but pure metals such as pb, Sn, B1, pb-5u-
Alloys such as 8b, pb-8n-Bi, and other wood metals may be used, and instead of ceramic fiber, glass fiber or carbon fiber may be selected from those having the required characteristics depending on the capacity. Even when used in the above embodiment, the same effects as in the above embodiment can be expected.
さらに、上記実施例においては、囲続部材を無機繊維で
構成し、両端をそれぞれ通電体と第2の電極とに固着し
た場合について説明したが、囲続部材の一端を低融点金
属の側面に沿って折曲げ、通電体と当接可能にすること
によって、囲繞部材を金属繊維で構成することができる
。Furthermore, in the above embodiment, the case where the surrounding member is made of inorganic fibers and both ends are fixed to the current carrying body and the second electrode respectively is explained, but one end of the surrounding member is attached to the side surface of the low melting point metal. The surrounding member can be made of metal fibers by bending the metal fibers along the metal fibers so that they can come into contact with the current-carrying body.
この発明によれば、過大な電流が流れたとき通電体の発
熱で溶融される低融点金属を、所定の繊維を所定の大き
さの目に編んだ囲続部材で包み、溶融された低融点金属
を短時間保持するように構成することによって、多量の
溶融した低融点金属をほとんど同時に滴下するので、両
電極間の通電容量が十分確保される。According to this invention, the low melting point metal that is melted by the heat generated by the current carrying body when an excessive current flows is wrapped in a surrounding member made of predetermined fibers woven into meshes of a predetermined size. By configuring the metal to be held for a short time, a large amount of molten low-melting point metal is dropped almost simultaneously, so that a sufficient current carrying capacity between both electrodes is ensured.
第1図は電力変換装置の構成図、第2図は従来の電気装
置を示す断面図、第8図はこの発明の一実施例を示す断
面図である。図において、(1)は第1の電極、(2)
は第2の電極、(3)は通電体、(4)は低融点金属、
(6)は囲続部材である。
なお各図中同一符号は同−又は相当部分を示す。
代理人 葛野信−
凶
7−
第3図
8 1a 8a 2aFIG. 1 is a block diagram of a power conversion device, FIG. 2 is a sectional view showing a conventional electric device, and FIG. 8 is a sectional view showing an embodiment of the present invention. In the figure, (1) is the first electrode, (2)
is the second electrode, (3) is the current carrying body, (4) is the low melting point metal,
(6) is an enclosing member. Note that the same reference numerals in each figure indicate the same or equivalent parts. Agent Makoto Kuzuno - Akira 7 - Figure 3 8 1a 8a 2a
Claims (3)
対の電極間に互いに密着された通電体と低融点金属とを
電気的に直列に接続して配置し、上記低融点金属が上記
再通電部の上部になるように構成されたものにおいて、
上記低融点金属は上記通電体と上記電極との間を所定の
間隔に保つ間隔部材が埋設され比抵抗及び融点が低融点
金属の比抵抗及び融点より大きい繊維を所定の大きさの
目に編んだ囲続部材で包まれていることを特徴とする電
気装置。(1) A current-carrying body and a low-melting point metal are electrically connected in series and arranged between a pair of electrodes having respective current-carrying parts facing each other at a predetermined interval, and the low-melting point metal is electrically connected in series with the low-melting point metal. In those configured to be the upper part of the re-energizing part,
The low melting point metal has a spacing member embedded therein to maintain a predetermined distance between the current carrying body and the electrode, and fibers having a specific resistance and melting point larger than that of the low melting point metal are woven into a predetermined size. An electrical device characterized in that the electrical device is wrapped in an enclosing member.
温度を有する金属又は合金であることを特徴とする特許
請求の範囲第1項記載の電気装置。(2) The electrical device according to claim 1, wherein the low melting point metal is a metal or alloy having a freezing point or liquidus temperature of 8279C or lower.
特徴とする特許請求の範囲第1項記載の電気装置。(3) The electrical device according to claim 1, wherein the mesh of the surrounding member is 0.1 to 0.5 mm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21867382A JPS59108302A (en) | 1982-12-14 | 1982-12-14 | Electric device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21867382A JPS59108302A (en) | 1982-12-14 | 1982-12-14 | Electric device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS59108302A true JPS59108302A (en) | 1984-06-22 |
JPH0211001B2 JPH0211001B2 (en) | 1990-03-12 |
Family
ID=16723623
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21867382A Granted JPS59108302A (en) | 1982-12-14 | 1982-12-14 | Electric device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS59108302A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5724050A (en) * | 1994-09-12 | 1998-03-03 | Matsushita Electric Industrial Co., Ltd. | Linear-circular polarizer having tapered polarization structures |
US5760658A (en) * | 1993-09-03 | 1998-06-02 | Matsushita Electric Industrial Co., Ltd. | Circular-linear polarizer including flat and curved portions |
US5852390A (en) * | 1995-11-13 | 1998-12-22 | Matsushita Electric Industrial Co., Ltd. | Circularly polarized wave-linearly polarized wave transducer |
-
1982
- 1982-12-14 JP JP21867382A patent/JPS59108302A/en active Granted
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5760658A (en) * | 1993-09-03 | 1998-06-02 | Matsushita Electric Industrial Co., Ltd. | Circular-linear polarizer including flat and curved portions |
US5724050A (en) * | 1994-09-12 | 1998-03-03 | Matsushita Electric Industrial Co., Ltd. | Linear-circular polarizer having tapered polarization structures |
US5937509A (en) * | 1994-09-12 | 1999-08-17 | Matsushita Electric Industrial Co., Ltd. | Method of manufacturing linear-circular polarizer |
US5852390A (en) * | 1995-11-13 | 1998-12-22 | Matsushita Electric Industrial Co., Ltd. | Circularly polarized wave-linearly polarized wave transducer |
Also Published As
Publication number | Publication date |
---|---|
JPH0211001B2 (en) | 1990-03-12 |
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