JPH09294372A - Switching power supply device - Google Patents
Switching power supply deviceInfo
- Publication number
- JPH09294372A JPH09294372A JP12784596A JP12784596A JPH09294372A JP H09294372 A JPH09294372 A JP H09294372A JP 12784596 A JP12784596 A JP 12784596A JP 12784596 A JP12784596 A JP 12784596A JP H09294372 A JPH09294372 A JP H09294372A
- Authority
- JP
- Japan
- Prior art keywords
- copper bar
- power supply
- switching power
- supply device
- heat radiation
- 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.)
- Pending
Links
Landscapes
- Dc-Dc Converters (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】 本発明はスイッチング電源装置
に関するものであり，特に放熱構造について改良したス
イッチング電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switching power supply device, and more particularly to a switching power supply device having an improved heat dissipation structure.
【０００２】[0002]
【従来技術】 スイッチング電源装置において，１次側
についてはスイッチング素子で高周波スイッチングする
ことにより変換効率を高めることができる。その２次側
回路については大電流を流す場合には，この電流経路の
ダイオードは発熱量が大きく，放熱が設計上の大きな問
題となる。例えば100 アンペアの場合には，ダイオード
の電圧降下を0.5 ボルトとして50ワットの電力損失が熱
として集中発生することから問題の重要性は理解され
る。2. Description of the Related Art In a switching power supply device, conversion efficiency can be improved by performing high frequency switching on a primary side with a switching element. When a large current flows through the secondary side circuit, the diode in this current path generates a large amount of heat, and heat dissipation becomes a major design problem. For example, in the case of 100 amperes, the importance of the problem is understood because the power loss of 50 watts is concentrated as heat when the voltage drop of the diode is 0.5 volt.
【０００３】 特に出力側を同種のものを含めて他の電
源装置と共に並列運転する場合には，並列運転時の逆流
防止のためのダイオードが電流経路の出力端子の直前に
配設される。この並列運転用直列ダイオードの電気的に
出力端子の直前であるため，電気的特性をより向上させ
るためには，物理的位置は出力端子の直前が好ましい。
しかし出力端子はスイッチング電源装置の端の位置にあ
るため，この並列運転用直列ダイオードの位置も端にす
ることになる。しかし，放熱の条件からは放熱フィン等
の端の位置では熱分布がかたよって不都合となる。Particularly, when the output side is operated in parallel with other power supply devices including the same type, a diode for preventing backflow during parallel operation is arranged immediately before the output terminal of the current path. Since the series operation diode for parallel operation is immediately before the output terminal, the physical position is preferably immediately before the output terminal in order to further improve the electrical characteristics.
However, since the output terminal is located at the end of the switching power supply unit, the position of the series diode for parallel operation is also located at the end. However, depending on the heat radiation conditions, the heat distribution at the edge positions such as the heat radiation fins becomes difficult, which is inconvenient.
【０００４】[0004]
【発明が解決しようとする課題】 本発明はスイッチン
グ電源装置において並列運転用直列ダイオードの放熱特
性を向上させることを課題とする。SUMMARY OF THE INVENTION It is an object of the present invention to improve the heat dissipation characteristic of a series diode for parallel operation in a switching power supply device.
【０００５】[0005]
【課題解決へのみちすじ】 図１は課題解決へのみちす
じを図解するものである。一般的には図１(a) に示すよ
うに，発熱体16は放熱フィン23のほぼ中央部に配設する
と熱が四方端部に向かってあまねく伝達放散するため，
放熱条件として好ましくかつそのように予定されてい
る。しかし並列運転用直列ダイオードについては，図１
(b) に示すように，端部に発熱体16を配設せざるを得な
い。この場合には，放熱フィン23の右端に伝達する熱
は，中央部に発熱体を置く場合と比較して距離が倍とな
るのでおおむね半分程度となる。そこで図１(c) に示す
ように，放熱フィン23に銅バー25を裏打ちして，熱伝達
の等価的厚さを倍増しようと考えた。そうすれば，発熱
体16を放熱フィン23の端部に配設しても，中央部に配設
した場合と同様の効果が期待できる。そして銅バー25を
単に伝熱補強手段としてではなく，電気的接続手段とし
て有効利用しようと考えた。[Problems for solving problems] FIG. 1 illustrates a scheme for solving problems. In general, as shown in FIG. 1 (a), when the heating element 16 is arranged in the substantially central portion of the radiation fin 23, heat is generally transferred and dissipated toward the four end portions,
Heat dissipation conditions are preferred and planned as such. However, the series diode for parallel operation is shown in Fig. 1.
As shown in (b), there is no choice but to dispose the heating element 16 at the end. In this case, the heat transmitted to the right end of the radiating fin 23 is approximately half because the distance is doubled as compared with the case where the heating element is placed in the central portion. Therefore, as shown in Fig. 1 (c), we thought to double the equivalent thickness of heat transfer by lining the heat dissipation fin 23 with a copper bar 25. Then, even if the heating element 16 is arranged at the end of the heat radiation fin 23, the same effect as when it is arranged at the center can be expected. And I thought that the copper bar 25 should be effectively used not only as a heat transfer reinforcement means but as an electrical connection means.
【０００６】[0006]
【課題を解決するための手段】 上記の考え方をまとめ
て課題を解決するための手段を以下のように提案する。
出力側に並列運転用直列ダイオードを備えるスイッチン
グ電源装置において，放熱フィンの平面側に銅バーを伝
熱・電気絶縁薄シートを介して密着させて，この銅バー
の一端に前記並列運転用直列ダイオードを取付けること
を特徴とするスイッチング電源装置を提案する。[Means for Solving the Problems] The means for solving the problems is proposed as follows by summarizing the above ideas.
In a switching power supply device having a series diode for parallel operation on the output side, a copper bar is adhered to the flat side of a heat radiation fin via a thin sheet for heat transfer and electrical insulation, and the series diode for parallel operation is attached to one end of the copper bar. We propose a switching power supply device which is characterized by mounting.
【０００７】 また，第２の手段として，二次側に整流
ダイオードと並列運転用直列ダイオードとを備えるスイ
ッチング電源装置において，放熱フィンの平面側に銅バ
ーを伝熱・電気絶縁薄シートを介して密着させて，この
銅バーのほぼ両端に前記整流ダイオードと前記並列運転
用直列ダイオードとを取付けることを特徴とするスイッ
チング電源装置を提案する。As a second means, in a switching power supply device having a rectifying diode and a series diode for parallel operation on the secondary side, a copper bar is provided on the flat side of the heat dissipation fin via a heat transfer / electrically insulating thin sheet. We propose a switching power supply device characterized in that the rectifier diode and the series diode for parallel operation are attached to both ends of the copper bar in close contact with each other.
【０００８】 以上の手段は一般的に利用することがで
きる。つまり，スイッチング電源装置において，放熱フ
ィンの平面側に銅バーを伝熱・電気絶縁薄シートを介し
て密着させて，この銅バーの一端に発熱部品を取付ける
こととして利用できる。The above means can be generally used. That is, in the switching power supply device, the copper bar may be adhered to the flat side of the heat radiation fin via the heat transfer / electrical insulation thin sheet, and the heat generating component may be attached to one end of the copper bar.
【０００９】[0009]
【実施例】 図２は本発明を実施するスイッチング電源
装置の回路図を示す。入力端子１，３から商用交流電源
を受け，スイッチング回路５で整流し，高周波スイッチ
ングを行う。この高周波電圧を変圧器７の１次巻線に送
り，その２次巻線からは降圧した電圧を得て，ダイオー
ド９と11とにより整流する。さらにチョークコイル13と
コンデンサ15により平滑して所定の直流出力電圧を得て
出力端子19と21に出力する。ここでコンデンサ15の一端
と，出力端子21との間には並列運転用直列ダイオード17
が接続される。このダイオードは出力端子19と21との間
に，並列に他の電源装置が接続された場合に逆流を防止
するために設けられている。Embodiment FIG. 2 shows a circuit diagram of a switching power supply device for implementing the present invention. It receives commercial AC power from the input terminals 1 and 3, rectifies it in the switching circuit 5, and performs high-frequency switching. This high-frequency voltage is sent to the primary winding of the transformer 7, the step-down voltage is obtained from the secondary winding, and rectified by the diodes 9 and 11. Further, it is smoothed by the choke coil 13 and the capacitor 15 to obtain a predetermined DC output voltage and output it to the output terminals 19 and 21. Here, a series diode 17 for parallel operation is provided between one end of the capacitor 15 and the output terminal 21.
Is connected. This diode is provided between the output terminals 19 and 21 to prevent backflow when another power supply device is connected in parallel.
【００１０】 図３は本発明に係るスイッチング電源装
置の構造の一実施例の上面図である。図２に示す回路部
品のうち，発熱量の大きい整流用のダイオード９と11お
よび並列運転用ダイオード17のみについて示してある。FIG. 3 is a top view of an embodiment of the structure of the switching power supply device according to the present invention. Of the circuit components shown in FIG. 2, only the diodes 9 and 11 for rectification and the diode 17 for parallel operation, which generate a large amount of heat, are shown.
【００１１】 放熱フィン23はアルミニウムの引き抜き
加工でされた一般的なものであり，フィン部24と平板部
22とからなる。フィン部24が垂直に効率よく放熱される
よう配設される。平板部22にはほぼ全面にわたって銅バ
ー25が平行密着するよう取りつけられる。このとき，平
板部22と銅バー25との間には伝熱電気絶縁シート27が挿
入される。またそれぞれ複数の取付ネジ29と絶縁ワッシ
ャ31とナット33とにより，放熱フィン23と銅バー25とを
固定する。The radiating fin 23 is a general one made by drawing aluminum, and has a fin portion 24 and a flat plate portion.
Consists of 22. The fin portions 24 are arranged vertically so as to efficiently radiate heat. A copper bar 25 is attached to the flat plate portion 22 so as to be in parallel and substantially parallel contact with the flat plate portion 22. At this time, the heat transfer electrically insulating sheet 27 is inserted between the flat plate portion 22 and the copper bar 25. Further, the radiation fins 23 and the copper bar 25 are fixed by a plurality of mounting screws 29, insulating washers 31, and nuts 33, respectively.
【００１２】 銅バー25上の端部（図３紙面の上端）
に，並列運転用直列ダイオード17をそれぞれ複数の取付
ネジ35と絶縁ワッシャ37とにより，銅バー25を挟んで放
熱フィン23に固定する。また，銅バー25上の端部（図３
紙面の下端）に，整流ダイオード９，11を同様に銅バー
25を挟んで放熱フィン23に固定する。そして整流ダイオ
ード11のアノードと並列運転用直列ダイオード17のカソ
ードとは，銅バー25によって電気的に接続される。The end on the copper bar 25 (the upper end of the paper surface of FIG. 3)
Then, the parallel operation series diode 17 is fixed to the heat radiation fin 23 with the copper bar 25 sandwiched by the plurality of mounting screws 35 and the insulating washers 37, respectively. In addition, the end part on the copper bar 25 (Fig. 3
At the bottom edge of the paper, connect the rectifier diodes 9 and 11 to the copper bar
It is fixed to the radiation fin 23 with 25 in between. The anode of the rectifying diode 11 and the cathode of the series diode 17 for parallel operation are electrically connected by the copper bar 25.
【００１３】 図示されていないが，銅バー25上の端部
（図３紙面の上端）近傍には出力端子19，21があるの
で，並列運転用直列ダイオード17とは至近距離にあり，
電気的には好ましい配置となる。Although not shown, since there are output terminals 19 and 21 in the vicinity of the end (upper end of the paper surface of FIG. 3) on the copper bar 25, there is a close distance to the series diode 17 for parallel operation,
This is an electrically favorable arrangement.
【００１４】 すでに段落０００５で説明したように，
放熱フィン23は熱伝導性の良好な材質の銅バー25によっ
て裏打ちされており，発熱体である並列運転用直列ダイ
オード17や整流ダイオード９，11が，放熱フィン23の端
部に配設されていても，充分な放熱作用を得ることがで
きる。As already explained in paragraph 0005,
The radiating fin 23 is lined with a copper bar 25 made of a material having good thermal conductivity, and the series operation diode 17 for parallel operation and the rectifying diodes 9 and 11 which are heating elements are arranged at the end of the radiating fin 23. However, a sufficient heat dissipation effect can be obtained.
【００１５】[0015]
【発明の効果】 本発明は以上述べたような特徴を有
し，スイッチング電源装置の放熱フィンに銅バーを裏打
ちしてあり，実質的な放熱フィンの厚さが厚くなるの
で，発熱部品の取付け位置による，温度分布を改善する
作用がある。EFFECTS OF THE INVENTION The present invention has the above-described characteristics, and the heat radiation fins of the switching power supply device are lined with copper bars, and the thickness of the heat radiation fins is substantially increased. It has the effect of improving the temperature distribution depending on the position.
【図１】本発明の原理を説明するための図である。FIG. 1 is a diagram for explaining the principle of the present invention.
【図２】スイッチング電源装置の回路図を示す。FIG. 2 shows a circuit diagram of a switching power supply device.
【図３】本発明に係るスイッチング電源装置の構造の一
実施例の上面図である。FIG. 3 is a top view of one embodiment of the structure of the switching power supply device according to the present invention.
１，３…入力端子 ５…変換回路 ７…
変圧器 ９，11…整流ダイオード 13…チョークコイル 15
…コンデンサ 17…並列運転用直列ダイオード 19，21…出力端子 23…放熱フィン 25…銅バー 27…伝熱
電気絶縁シート 29…取付ネジ 31…絶縁ワッシャ 33…
ナット 35…取付ネジ 37…絶縁ワッシャ1, 3 ... Input terminal 5 ... Conversion circuit 7 ...
Transformer 9, 11… Rectifier diode 13… Choke coil 15
… Capacitor 17… Series diode for parallel operation 19, 21… Output terminal 23… Radiating fin 25… Copper bar 27… Heat transfer electrical insulation sheet 29… Mounting screw 31… Insulation washer 33…
Nut 35… Mounting screw 37… Insulation washer
Claims (3)
るスイッチング電源装置において，放熱フィンの平面側
に銅バーを伝熱・電気絶縁薄シートを介して密着させ
て，この銅バーの一端に前記並列運転用直列ダイオード
を取付けることを特徴とするスイッチング電源装置。1. In a switching power supply device having a series diode for parallel operation on the output side, a copper bar is brought into close contact with a flat side of a heat radiation fin via a heat transfer / electrically insulating thin sheet, and one end of the copper bar is connected to the copper bar. A switching power supply device comprising a series diode for parallel operation.
ダイオードとを備えるスイッチング電源装置において，
放熱フィンの平面側に銅バーを伝熱・電気絶縁薄シート
を介して密着させて，この銅バーのほぼ両端に前記整流
ダイオードと前記並列運転用直列ダイオードとを取付け
ることを特徴とするスイッチング電源装置。2. A switching power supply device comprising a rectifying diode and a parallel operation series diode on the secondary side,
A switching power supply characterized in that a copper bar is adhered to a flat side of a heat radiation fin via a heat transfer / electrical insulation thin sheet, and the rectifying diode and the series diode for parallel operation are attached to substantially both ends of the copper bar. apparatus.
ンの平面側に銅バーを伝熱・電気絶縁薄シートを介して
密着させて，この銅バーの一端に発熱部品を取付けるこ
とを特徴とするスイッチング電源装置。3. A switching power supply in a switching power supply, characterized in that a copper bar is closely adhered to the flat side of a radiation fin via a heat transfer / electrically insulating thin sheet, and a heat-generating component is attached to one end of the copper bar. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12784596A JPH09294372A (en) | 1996-04-24 | 1996-04-24 | Switching power supply device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12784596A JPH09294372A (en) | 1996-04-24 | 1996-04-24 | Switching power supply device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09294372A true JPH09294372A (en) | 1997-11-11 |
Family
ID=14970098
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12784596A Pending JPH09294372A (en) | 1996-04-24 | 1996-04-24 | Switching power supply device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09294372A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001238465A (en) * | 2000-02-25 | 2001-08-31 | Sharp Corp | Inverter device |
| JP2012227374A (en) * | 2011-04-20 | 2012-11-15 | Mitsubishi Electric Corp | Heat radiation structure of electronic apparatus |
-
1996
- 1996-04-24 JP JP12784596A patent/JPH09294372A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001238465A (en) * | 2000-02-25 | 2001-08-31 | Sharp Corp | Inverter device |
| JP2012227374A (en) * | 2011-04-20 | 2012-11-15 | Mitsubishi Electric Corp | Heat radiation structure of electronic apparatus |
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| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20030409 |