JPH02144904A - Heat sink device - Google Patents

Heat sink device

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Publication number
JPH02144904A
JPH02144904A JP29878288A JP29878288A JPH02144904A JP H02144904 A JPH02144904 A JP H02144904A JP 29878288 A JP29878288 A JP 29878288A JP 29878288 A JP29878288 A JP 29878288A JP H02144904 A JPH02144904 A JP H02144904A
Authority
JP
Japan
Prior art keywords
heat sink
refrigerant
heat
container
air
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.)
Granted
Application number
JP29878288A
Other languages
Japanese (ja)
Other versions
JP2619707B2 (en
Inventor
Masaichi Matsumoto
正市 松本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP63298782A priority Critical patent/JP2619707B2/en
Publication of JPH02144904A publication Critical patent/JPH02144904A/en
Application granted granted Critical
Publication of JP2619707B2 publication Critical patent/JP2619707B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To make the device compact and improve cooling efficiency by providing a plurality of flat plate heat sink members above the top of a container in which a heater is housed and which is filled with a refrigerant with a space therebetween, and cooling through the flat plate heat sink members the refrigerant that rise in temperature as a result of absorbing a heat from the heater by cooling air flowing through the space from opposite ends of the container. CONSTITUTION:A refrigerant 3 that rises in temperature as a result of absorbing a heat from a heater 2 is cooled by air around the outer circumferential portion thereof through a heat sink plate 21 and lowers through a common header 23 to a side in a container 1 defined by a barrier 4 where no heater 2 is existent, and further passes through the lower portion of the barrier 4 to again cool the heater 2. The air 16 around the outer circumferential portion of a plurality of the heat sink plates 21 absorbs the heat by the refrigerant 3 through the heat sink plates 21 to cool the refrigerant 3 and rises in temperature by itself. Thus, the air is reduced in its density and made light-weight and hence ascends. Fresh air 16 flows into from a space A2 between the lower edges of the heat sink plates 21 and a cover 5 and from the opposite ends of the heat sink plates 21 so as to compensate the air ascending as described above. The title device is constructed to produce natural convection as such, so that the size of the space 2A between the heat sink plates 21 and the cover 5 can be reduced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は冷媒を介して発熱体を空冷する放熱装置に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a heat radiating device that air-cools a heating element through a refrigerant.

〔従来の技術〕[Conventional technology]

第4図a及びbは従来の放熱装置としての、容器の上部
に放熱器を設けた変圧器の筐体の正面図および側面図で
ある。図において、(1)は容器、(2)は容器(1)
に収納され、コイルと鉄心からなり1通電されて発熱す
る発熱体、(3)は容器(1)内に充満された絶縁油等
の冷媒、(4)は冷媒(3)を効率良く自然対流により
循環させるために容器(1)内に設けたバリア、(5)
は容器(1)のカバー、 (6)、 (7)は容器カバ
ー(5)の両端部に設けられたフランジである。 (1
0)は放熱器であり、その詳細を第5図a、bに示す。
FIGS. 4a and 4b are a front view and a side view of a casing of a transformer, which is a conventional heat radiating device, and has a radiator provided in the upper part of the container. In the figure, (1) is a container, (2) is a container (1)
(1) is a heating element that generates heat when energized, consisting of a coil and an iron core; (3) is a refrigerant such as insulating oil filled in the container (1); (4) is an efficient natural convection system for refrigerant (3). (5) a barrier provided within the container (1) for circulation by
is a cover of the container (1), and (6) and (7) are flanges provided at both ends of the container cover (5). (1
0) is a heat sink, the details of which are shown in FIGS. 5a and 5b.

放熱器(10)は複数枚の中空の放熱器(II)と、こ
の複数枚の放熱板(11)の両端部に接合されたJ(通
ヘッダ(12)、 (+3)、および共通ヘッダ(12
)。
The heatsink (10) includes a plurality of hollow heatsinks (II), J (through headers (12), (+3)), and a common header (J) joined to both ends of the plurality of heatsinks (11). 12
).

(13)のそれぞれに設けられ、上記カバー(5)のフ
ランジ(6)、 (7)と接続されたフランジ(+4)
、 (15)から構成されている。なお、複数枚の放熱
板(11)とカバー(5)の間には冷却用空気(16)
が流入するための間隙A、が設けられている。
Flange (+4) provided on each of (13) and connected to flanges (6) and (7) of the cover (5)
, (15). In addition, cooling air (16) is provided between the plurality of heat sinks (11) and the cover (5).
A gap A is provided for the inflow of water.

次に第4図により、動作について説明する。容器(1)
内に収納されている発熱体(2)が発熱するとその周辺
の冷媒(3)がその発熱を傳っで発熱体(2)を冷却す
ると共に、それ自身は昇温して密度が小さくなる。バリ
ア(4)を境にして容器(1)内の発熱体(2)側とそ
の反対側では冷媒に比較的大きな密度差を生じるので、
密度の小さな発熱体(2)側の冷媒(3)はト昇し、共
通ヘッダー(12)で′Fu数枚の放熱板(+1)に分
流され、この放熱板(11)にて空冷され共通ヘッダ(
13)を通って再び容器(+)内に戻る自然対流による
循環が生じる。上記放熱板(11)の外側の空気(16
)は放熱板(11)を介して冷媒(3)より熱を奪って
軽くなり、ヒ昇すると共に、新たな空気がカバー(5)
と放熱板(11)の間の間隙A1部より流入する。 F
記間隙Δ1は複数枚の放熱板(11)を冷却するための
空気供給口の役目を有するので十分な寸法を必要とする
Next, the operation will be explained with reference to FIG. Container (1)
When the heating element (2) housed inside generates heat, the refrigerant (3) around it absorbs the heat and cools the heating element (2), and at the same time, the temperature of the heating element (2) increases and its density decreases. Since there is a relatively large density difference in the refrigerant between the heating element (2) side and the opposite side of the container (1) with the barrier (4) as the boundary,
The refrigerant (3) on the side of the heating element (2), which has a small density, rises, is divided into several heat sinks (+1) by the common header (12), and is air-cooled by this heat sink (11) to the common header(
13) and back into the container (+) again due to natural convection. The air outside the heat sink (11) (16
) absorbs heat from the refrigerant (3) through the heat dissipation plate (11), becomes lighter, rises, and new air flows into the cover (5).
It flows in from the gap A1 between the heat sink and the heat sink (11). F
The gap Δ1 has a role of an air supply port for cooling the plurality of heat sinks (11), so it needs to have a sufficient size.

〔発明が解決しようとする問題点〕 従来の放熱装置は以1−.のように構成されているので
、容器(1)に収納された発熱体(2)を冷却する冷媒
(3)を、上記容器(1)の上側に並設された複数枚の
放熱板(11)を介して空冷する冷却空気(16)の供
給は、上記放熱板(11)の両側端が共通ヘッダー(1
2)、 (13)でふさがれるために、その下側端と上
記容器(1)のカバー(5)間からだけに限定されるた
めこの間隙寸法Δ1を比較的大きくすることが必要で、
放熱装置の高さ寸法が大きなものとなり、屋内設置の場
合に支障を生ずるという問題点があったこの発明は上記
のような問題点を解消するためになされたもので、放熱
装置の高さ寸法が比較的小さく、かつ、同一・体積では
比較的大きな放熱面積を確保できる放熱装置を得ること
を目的とする〔課題を解決するための手段〕 この発明に係る放熱装置は1発熱体を収納して冷媒を充
填した容器と、中空部が形成されると共に下縁両端部に
旧記容器の内部と連通ずる開口部がそれぞれ形成された
複数枚の平板状放熱部材を備え、上記複数枚の平板状放
熱部材はその両端側より冷却空気が流入し、上記平板状
放熱部材を介してL記冷媒が冷却されるように、上記容
器の天板上部に間隙を設けて並設されたものである。
[Problems to be solved by the invention] The conventional heat dissipation device has the following problems. Since the structure is as follows, the refrigerant (3) for cooling the heating element (2) housed in the container (1) is transferred to a plurality of heat sinks (11) arranged in parallel on the upper side of the container (1). ) The cooling air (16) is supplied via the common header (1
2) and (13), it is necessary to make this gap dimension Δ1 relatively large because it is limited to only from between the lower end and the cover (5) of the container (1).
This invention was made to solve the above problems, as the height of the heat dissipation device becomes large, causing problems when installed indoors. [Means for Solving the Problem] A heat radiating device according to the present invention accommodates one heating element. a container filled with a refrigerant, and a plurality of flat heat dissipating members each having a hollow portion and an opening communicating with the inside of the former container at both ends of the lower edge; The heat radiating members are arranged side by side with a gap provided above the top plate of the container so that cooling air flows in from both ends of the heat radiating members and the L refrigerant is cooled through the flat heat radiating members.

〔作用〕[Effect]

この発明における複数枚の平板状放熱部材は発熱体を収
納して冷媒を充填した容器の天板」一部に間隙を設けて
並設され、その両端側より一上記間隙に流入する冷却空
気により、上記平板状放熱部材を介して一上記発熱体が
発熱する熱を奪って昇温した冷媒を冷却する。
A plurality of flat heat radiating members according to the present invention are arranged side by side with a gap in a part of the top plate of a container that houses a heating element and is filled with a refrigerant, and cooling air flows into the gap from both ends of the plate. , the refrigerant whose temperature has risen is cooled by removing the heat generated by the heating element through the flat heat radiating member.

〔発明の実施例〕[Embodiments of the invention]

第1図aおよびbはこの発明の一実施例を示す放熱装置
としての、容器の上部に放熱器を設けた変圧器筐体の正
面図および側面図である。なお。
FIGS. 1A and 1B are a front view and a side view of a transformer housing having a heat radiator provided in the upper part of the container, which serves as a heat radiator according to an embodiment of the present invention. In addition.

図中、従来例のものと同一符号で示したものは同−又は
相当部分を示す。
In the drawings, the same reference numerals as in the conventional example indicate the same or corresponding parts.

第1図a、bにおいて、 (20)は放熱器であり そ
の詳細を第2図a ”−cに示す。放熱器(2o)は中
空部が形成された複数枚の放熱板(21)、共通ヘッダ
(22)、 (23)、および共通ヘッダにそれぞれ形
成されたフランジ(24)、 (25)、から構成され
ており、第2図Cに示すように、その中央部において複
数の中空部に仕切られ2両端部において統合されており
かつ、下縁両端部において共通ヘッダ(22)、 (2
3)とそれぞれ一体に結合されている。L記数熱板(2
1)の下縁両端部における共通ヘッダ(22)、 (2
3)、との結合部分は開口されて両者間は連通している
と共に、上記共通ヘッダ(22)、 (23)にはそれ
ぞれフランジ(24)、 (24)が設けられ、容器(
+)のカバー(5)のフランジ(6)、 (7)、にそ
れぞれ取り付けられることにより、L記数熱板(21)
の中空部は容器(+)の内部と連通される。そして、放
熱板(21)の中空部および共通ヘッダ(22)、 (
23)には容器(1)内と同様に冷媒(3)が充満され
ている。また、複数枚の放熱板(21)の下端部と容器
(])のカバー(5)間には共通ヘッダ(22)、 (
23)およびそのフランジ<24>、 (25)、カバ
ー(5)のフランジ(6)、 (7)により間隙式が形
成されている。
In Figures 1a and 1b, (20) is a heat radiator, the details of which are shown in Figure 2 a''-c. It is composed of common headers (22), (23), and flanges (24), (25) formed on the common header, respectively, and as shown in Fig. 2C, a plurality of hollow portions are formed in the center thereof. It is partitioned into 2 and integrated at both ends, and has a common header (22) at both ends of the lower edge, (2
3) and are each integrally combined. L number hot plate (2
Common header (22) at both ends of the lower edge of 1), (2
3), is opened to communicate between them, and the common headers (22) and (23) are respectively provided with flanges (24) and (24),
+) is attached to the flanges (6) and (7) of the cover (5), respectively, so that the L heat plate (21)
The hollow part of is communicated with the inside of the container (+). Then, the hollow part of the heat sink (21) and the common header (22), (
23) is filled with refrigerant (3) in the same way as in the container (1). In addition, a common header (22), (
23), its flanges <24>, (25), and flanges (6), (7) of the cover (5) form a gap type.

次に動作について説明する。なお、この実施例と先に説
明した従来例とは放熱器(20)の構造が異なるもので
あり、従来例の場合と同様に、容器(1)内のバリア(
4)で仕切られた発熱体(2)側の冷媒(3)が発熱体
(2)の発熱した熱を奪って自からは昇、温し、密度が
小さくなり軽くなってヒ昇し、共通ヘッダ(22)を通
り、複数枚の放熱板(21)に分流され、また、各放熱
板(21)において、第2図Cに示すように分割された
空隙を流路として平行に分流する。上記発熱体(2)か
ら熱を奪って昇温した冷媒(3)は放熱板り21)を介
してその外周部の空気により冷却され、共通ヘッダ(2
3)を通って容器(1)内のバリア(4)で仕切られた
発熱体(2)が存在しない側に下降し、バリア(4)の
下部を通って発熱体(2)を再び冷却する。
Next, the operation will be explained. This embodiment differs from the conventional example described earlier in the structure of the radiator (20), and as in the conventional example, the barrier (
The refrigerant (3) on the side of the heating element (2) separated by 4) takes away the heat generated by the heating element (2) and rises in temperature, becomes less dense and lighter, and rises in temperature. The flow passes through the header (22) and is divided into a plurality of heat sinks (21), and in each heat sink (21), the flow is divided in parallel using divided gaps as shown in FIG. 2C. The refrigerant (3), whose temperature has risen by taking heat from the heating element (2), is cooled by the air around its outer periphery via the heat dissipation plate 21),
3) to the side of the container (1) separated by the barrier (4) where the heating element (2) is not present, and passes through the lower part of the barrier (4) to cool the heating element (2) again. .

複数枚の放熱板(21)の外周の空気(16)は、放熱
板(21)を介して冷媒(3)より熱を奪ってこれを冷
却すると共に、自からは昇温しで密1りが小さ(なって
軽くなり上昇する。そしてL記−ヒ昇した空気を補うよ
うに、新たな空気(16)が放熱板(21)の下縁部と
カバー(5)間の間隙Aおよび放熱板(21)の両側端
部より流入する。
The air (16) around the plurality of heat sinks (21) removes heat from the refrigerant (3) through the heat sinks (21) and cools it, and at the same time heats up and becomes denser. becomes smaller (and lighter) and rises.Then, new air (16) flows into the gap A between the lower edge of the heat sink (21) and the cover (5) to compensate for the air that has risen. It flows in from both ends of the plate (21).

複数枚の放熱板(21)の下縁部側からだけでなく両側
端部側からも冷却空気が流入し、放熱板(21)から熱
を奪って界温し、上部へ流出する自然対流が生じる構造
であるために、従来例の場合に比較して、放熱板(21
)とカバー(5)間の間隙Δの寸法がこの間隙へを通過
する放熱板(21)の冷却用空気(16)が少なくて済
む分小さくて良い。
Cooling air flows in not only from the lower edge side of the plurality of heat sinks (21) but also from both end sides, absorbs heat from the heat sink (21), becomes a field temperature, and flows out to the top due to natural convection. Because of this structure, the heat dissipation plate (21
) and the cover (5) may be small because less air (16) for cooling the heat sink (21) is required to pass through this gap.

第3図aおよびbはこの発明の別の実施例における放熱
器(30)および容器(1)のカバー(5)の平面図お
よびm面図である。発熱体(2)を収納した容器(1)
の内部構造は、第1図に示した実施例と同一であり2図
示することを省略している。図において、 (31)は
1枚の板から製作された複数枚のコルゲートフィンであ
り、容器(図示せず)のカバー(5)に配設されている
。 カバー(5)の所定の間隙で並設された各フィン(
31)の下縁両端部に対応する箇所において、コルゲー
トフィン(31)の中空部とL記容器の内部のバリア(
図示せず)で仕切られた各室とが連通されるように、[
−記カバー(5)に一対の穴が形成されており、かつ各
フィン(3I)の両側端縁部およびカバー(5)との当
接部は溶接により接合され1密封されている。1−記所
定の間隙で並設されたコルゲートフィン(31)が溶接
されたカバー(5)は上記容器に取り付けられ、各フィ
ン(31)の中空部には一上記容器内充填されたものと
同じ冷媒(3)が充満されている。
FIGS. 3a and 3b are a plan view and an m-plane view of a radiator (30) and a cover (5) of a container (1) in another embodiment of the present invention. Container (1) containing heating element (2)
The internal structure is the same as that of the embodiment shown in FIG. 1, and is not shown in FIG. In the figure, (31) is a plurality of corrugated fins made from a single plate, and is arranged on a cover (5) of a container (not shown). Each fin (
31) At locations corresponding to both ends of the lower edge, the hollow part of the corrugated fin (31) and the barrier (
(not shown) so that the rooms separated by [
- A pair of holes are formed in the cover (5), and both end edges of each fin (3I) and the contact portion with the cover (5) are joined by welding and sealed. 1- A cover (5) to which corrugated fins (31) arranged in parallel with a predetermined gap are welded is attached to the container, and the hollow part of each fin (31) is filled with one of the corrugated fins (31) filled in the container. It is filled with the same refrigerant (3).

この実施例は第1図に示した実施例における共通ヘッダ
(22)、 (23)、が省略されたものと等価であり
、冷媒(3)は容器(図示せず)とフルゲートフィン(
31)間で自然対流により循環し2発熱体(図示せず)
より熱を今い、コルゲートフィン(31)からなる放熱
器(30)より放熱することにより、上記発熱体を冷却
する。ただし複数枚のコルゲートフィン(31)を冷却
する空気(16)は各フィン(31)の両側端部から流
入し、各フィン(3I)から熱を奪って冷却して上側へ
流出するような自然対流を生じる。
This embodiment is equivalent to the embodiment shown in FIG. 1 in which the common headers (22) and (23) are omitted, and the refrigerant (3) is connected to a container (not shown) and a full gate fin (
31) Circulate by natural convection between two heating elements (not shown)
The heating element is cooled by radiating more heat from the radiator (30) made of corrugated fins (31). However, the air (16) that cools the multiple corrugated fins (31) flows in from both ends of each fin (31), absorbs heat from each fin (3I), cools it, and flows out upward. Causes convection.

この実施例は第1図に示した実施例と比較して放熱板(
21)の下端とカバー間の間隙Aに相当する冷却用流入
空気の供給口が存在しないので、その分、冷却効率が悪
くなるが1.L記間隙Aが存在しないために、容器およ
び放熱器(30)を含めた全高さ寸法が比較的小さくな
り、屋内設置等の設置空間に制約が存在する場合に大き
なメリットとなる〔発明の効果〕 以ヒのように、この発明によれば複数枚の平板状放熱部
材を1発熱体を収納して冷媒を充填した容器の天板−り
部に間隙を設けて並設し、その両端側より上記間隙に流
入する冷却空気により、上記発熱体が発熱する熱を奪っ
て昇温した冷媒を]二記羽板状放熱部材を介して冷却す
るようにしたのでコンパクトで冷却効率の良いものが得
られる効果がある。
This embodiment is different from the embodiment shown in FIG.
21) Since there is no supply port for cooling inflow air corresponding to the gap A between the lower end and the cover, the cooling efficiency deteriorates accordingly.1. Since the L gap A does not exist, the total height including the container and the radiator (30) is relatively small, which is a great advantage when there are restrictions on installation space such as indoor installation [Effects of the invention] ] As described below, according to the present invention, a plurality of flat heat dissipating members are arranged side by side with a gap in the top plate portion of a container containing one heating element and filled with a refrigerant, and both ends thereof are arranged side by side with a gap between them. The cooling air flowing into the gap removes the heat generated by the heating element and cools the refrigerant, which has risen in temperature, through the plate-like heat dissipation member, resulting in a compact and highly efficient cooling device. There are benefits to be gained.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図aおよびbはこの発明の一実施例による放熱装置
としての、放熱器を1一部取り付けた変圧器の正面図お
よび側面図、第2図a、b、cは第1図に示した放熱器
の詳細を示す、それぞれ平面図正面図および断面図、第
3図aおよびbはこの発明の別の実施例による放熱装置
の放熱器の正面図および側面図である。図において、(
1)は容器、(2)は発熱体、(3)は冷媒、(4)は
バリア、(5)はカバー(16)は冷却用空気、 (2
0)、 (30)は放熱器、 (21)は複数枚の放熱
板、 (22)、(23)は共通へラダー、(31)は
コルゲートフィンを示す。 なお1図中、同一符号は同一、又は相当部分を示す。
Figures 1a and b are front and side views of a transformer with a heat radiator partially attached as a heat radiator according to an embodiment of the present invention, and Figures 2 a, b, and c are shown in Figure 1. Figures 3a and 3b are a front view and a sectional view, respectively, showing details of a heat radiator according to another embodiment of the present invention. In the figure, (
1) is a container, (2) is a heating element, (3) is a refrigerant, (4) is a barrier, (5) is a cover (16) is cooling air, (2)
0) and (30) are a heat sink, (21) is a plurality of heat sinks, (22) and (23) are a common ladder, and (31) is a corrugated fin. In addition, in FIG. 1, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims] 発熱体を収納して冷媒を充填した容器と,中空部が形成
されると共に下縁両端部に上記容器の内部と連通する開
口部がそれぞれ形成された複数枚の平板状放熱部材を備
え,上記複数枚の平板状放熱部材はその両端側より冷却
空気が流入し,上記平板状放熱部材を介して上記冷媒が
冷却されるように,上記容器の天板上部に間隙を設けて
並設されたことを特徴とする放熱装置。
A container containing a heating element and filled with a refrigerant, and a plurality of flat heat dissipating members each having a hollow portion and openings communicating with the inside of the container at both ends of the lower edge. The plurality of flat heat radiating members are arranged side by side with a gap above the top plate of the container so that cooling air flows in from both ends thereof and the refrigerant is cooled through the flat heat radiating members. A heat dissipation device characterized by:
JP63298782A 1988-11-26 1988-11-26 Heat dissipation device Expired - Lifetime JP2619707B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63298782A JP2619707B2 (en) 1988-11-26 1988-11-26 Heat dissipation device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63298782A JP2619707B2 (en) 1988-11-26 1988-11-26 Heat dissipation device

Publications (2)

Publication Number Publication Date
JPH02144904A true JPH02144904A (en) 1990-06-04
JP2619707B2 JP2619707B2 (en) 1997-06-11

Family

ID=17864149

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63298782A Expired - Lifetime JP2619707B2 (en) 1988-11-26 1988-11-26 Heat dissipation device

Country Status (1)

Country Link
JP (1) JP2619707B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6143983B1 (en) * 2016-09-12 2017-06-07 三菱電機株式会社 Transformer for vehicle
JP2017135324A (en) * 2016-01-29 2017-08-03 株式会社日立産機システム Stationary induction apparatus
JP6180684B1 (en) * 2016-09-13 2017-08-16 三菱電機株式会社 Transformer for vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61207007A (en) * 1985-03-11 1986-09-13 Meidensha Electric Mfg Co Ltd Oil-immersed electric apparatus
JPS62291106A (en) * 1986-06-11 1987-12-17 Tokyo Electric Power Co Inc:The Coller for oil-filled transformer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61207007A (en) * 1985-03-11 1986-09-13 Meidensha Electric Mfg Co Ltd Oil-immersed electric apparatus
JPS62291106A (en) * 1986-06-11 1987-12-17 Tokyo Electric Power Co Inc:The Coller for oil-filled transformer

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017135324A (en) * 2016-01-29 2017-08-03 株式会社日立産機システム Stationary induction apparatus
JP6143983B1 (en) * 2016-09-12 2017-06-07 三菱電機株式会社 Transformer for vehicle
JP6180684B1 (en) * 2016-09-13 2017-08-16 三菱電機株式会社 Transformer for vehicle
WO2018051403A1 (en) * 2016-09-13 2018-03-22 三菱電機株式会社 Transformer for vehicle

Also Published As

Publication number Publication date
JP2619707B2 (en) 1997-06-11

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