JPS6440235U - - Google Patents
Info
- Publication number
- JPS6440235U JPS6440235U JP13321287U JP13321287U JPS6440235U JP S6440235 U JPS6440235 U JP S6440235U JP 13321287 U JP13321287 U JP 13321287U JP 13321287 U JP13321287 U JP 13321287U JP S6440235 U JPS6440235 U JP S6440235U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- primary winding
- main transformer
- series
- switch element
- 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
- 238000010586 diagram Methods 0.000 description 4
- 239000003990 capacitor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案による過電流保護回路を実施し
たブリツヂ型ＤＣ／ＤＣコンバータの回路構成図
、第２図は本考案の実施例の動作を説明する回路
図、第３図は従来の技術の回路構成図である。
１……第１のスイツチ素子、２……第２のスイ
ツチ素子、３，４……インピーダンス素子（コン
デンサ）、５……メイントランス、６……カレン
トトランス、７，８……ドライブ回路、９……整
流回路、１０……平滑回路、１１……電流検出回
路、１２……制御回路。
Fig. 1 is a circuit diagram of a bridge type DC/DC converter implementing an overcurrent protection circuit according to the present invention, Fig. 2 is a circuit diagram explaining the operation of the embodiment of the present invention, and Fig. 3 is a circuit diagram of the conventional technology. FIG. 3 is a circuit configuration diagram. DESCRIPTION OF SYMBOLS 1... First switch element, 2... Second switch element, 3, 4... Impedance element (capacitor), 5... Main transformer, 6... Current transformer, 7, 8... Drive circuit, 9 ... Rectifier circuit, 10 ... Smoothing circuit, 11 ... Current detection circuit, 12 ... Control circuit.
Claims (1)
る第１、第２のインピーダンス素子を並列に接続
してブリツヂを構成し、この並列接続点間に直流
入力電圧を加え、各直列する素子の接続点の間に
メイントランスの１次巻線を接続し、各スイツチ
素子を交互にＯＮ、ＯＦＦする手段を有し、メイ
ントランスの１次巻線に印加される電圧の極性を
交互に変化させ、メイントランスの２次巻線に誘
起する電圧を整流平滑して直流出力電圧を得ると
ともに、この直流出力電圧が一定になるように第
１、第２のスイツチ素子のＯＮ、ＯＦＦ周期を制
御する制御回路を備えたブリツヂ型ＤＣ／ＤＣコ
ンバータに於いて、メイントランスの１次巻線の
一端と第１のスイツチ素子の間、及びメイントラ
ンスの１次巻線の一端と第２のスイツチ素子の間
に、１次巻線が接続されたカレントトランスを設
け、このカレントトランスの２次巻線に誘起する
電圧が所定の電圧値を越えたとき、前記制御回路
は前記第１、第２のスイツチ素子をＯＦＦとする
ことを特徴とするブリツヂ型コンバータの過電流
保護回路。 The first and second switch elements connected in series and the first and second impedance elements connected in series are connected in parallel to form a bridge, and a DC input voltage is applied between these parallel connection points to increase the voltage of each series element. The primary winding of the main transformer is connected between the connection points and has means for alternately turning ON and OFF each switch element, thereby alternately changing the polarity of the voltage applied to the primary winding of the main transformer. , rectify and smooth the voltage induced in the secondary winding of the main transformer to obtain a DC output voltage, and control the ON and OFF periods of the first and second switch elements so that this DC output voltage is constant. In a bridge type DC/DC converter equipped with a control circuit, there is a connection between one end of the primary winding of the main transformer and the first switch element, and between one end of the primary winding of the main transformer and the second switch element. A current transformer with a primary winding connected therebetween is provided, and when the voltage induced in the secondary winding of this current transformer exceeds a predetermined voltage value, the control circuit switches between the first and second switches. An overcurrent protection circuit for a bridge type converter characterized by turning off an element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13321287U JPS6440235U (en) | 1987-09-02 | 1987-09-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13321287U JPS6440235U (en) | 1987-09-02 | 1987-09-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6440235U true JPS6440235U (en) | 1989-03-10 |
Family
ID=31390869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13321287U Pending JPS6440235U (en) | 1987-09-02 | 1987-09-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6440235U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114212A (en) * | 1981-12-28 | 1983-07-07 | Fujitsu Denso Ltd | Overcurrent protecting circuit of constant-voltage electric power supplying circuit |
-
1987
- 1987-09-02 JP JP13321287U patent/JPS6440235U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58114212A (en) * | 1981-12-28 | 1983-07-07 | Fujitsu Denso Ltd | Overcurrent protecting circuit of constant-voltage electric power supplying circuit |
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