JPH03169258A - Dc power supply - Google Patents
Dc power supplyInfo
- Publication number
- JPH03169258A JPH03169258A JP30546289A JP30546289A JPH03169258A JP H03169258 A JPH03169258 A JP H03169258A JP 30546289 A JP30546289 A JP 30546289A JP 30546289 A JP30546289 A JP 30546289A JP H03169258 A JPH03169258 A JP H03169258A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- output
- power supply
- circuit
- secondary side
- 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
- 230000010355 oscillation Effects 0.000 claims abstract description 17
- 230000007257 malfunction Effects 0.000 abstract description 4
- 238000004804 winding Methods 0.000 description 15
- 239000003990 capacitor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000009499 grossing Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、商用電ｔＡ（ＡＣ電圧）を入力し、次側に直
流電圧を発生ずるスインチング方式の直流電源装置に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a switching type DC power supply device which inputs commercial electricity tA (AC voltage) and generates a DC voltage on the next side.
従来の技術
従来のスイソチング方式（ＲＣＣ方式）の直流電源装置
の回路例を第３図に示す。2. Description of the Related Art FIG. 3 shows an example of a circuit of a conventional Swiss switching method (RCC method) DC power supply device.
第３図に於いて、電源入力端子１には商用電源（ＡＣＩ
ＯＯＶ）が入力され、整流ダイオード２と平滑用電解コ
ンデンサ３で直流電圧に変換する。In Figure 3, power input terminal 1 is connected to a commercial power source (ACI).
OOV) is input and converted into a DC voltage by a rectifier diode 2 and a smoothing electrolytic capacitor 3.
直？Ｍ電圧はスイノチング［・ランス４の一次側巻線の
端子ＰＩに供給され、上記一次側巻線の他端子Ｐ２は、
出力トランジスタ５のコレククに接続され、工ξンクは
接地されている。出力トランジスタ５のベースには上記
直流１「より抵抗６を介してハイアス電圧と上記スイッ
チング１・ランス４のドライブ巻線端子Ｂ Ｉよりダイ
オート８と抵抗９を介してトライブ電圧が供給され、−
上記ドライブ巻線端子Ｂ２は接地されている。straight? The M voltage is supplied to the terminal PI of the primary winding of the switching lance 4, and the other terminal P2 of the primary winding is
It is connected to the collector of the output transistor 5, and the terminal is grounded. The base of the output transistor 5 is supplied with a high-ass voltage from the DC 1 through a resistor 6 and a drive voltage from the drive winding terminal BI of the switching 1/lance 4 through a diode 8 and a resistor 9.
The drive winding terminal B2 is grounded.
上記抵抗６とスイノチングトランス４のトライブＳ線と
ダイオート８と抵ｊ７Ｌ９により発振回路を形威し、出
力トランジスタ５のベースに駆動電圧を供給し一次側の
電圧を出力している。The resistor 6, the drive S line of the switching transformer 4, the diode 8, and the resistor j7L9 form an oscillation circuit, which supplies a driving voltage to the base of the output transistor 5 and outputs the primary side voltage.
上記スインチングトランス４の二次側巻線の端子Ｓ１は
接地され、−Ｅ記二次側巻線の他端子Ｓ２に整流用ダイ
オード１０が接続され、整流後平滑用電解コンデンサ１
１で平滑された直流電圧（出力電圧）が出力端子ｌ２に
供給される。A terminal S1 of the secondary winding of the switching transformer 4 is grounded, a rectifying diode 10 is connected to the other terminal S2 of the secondary winding marked -E, and a smoothing electrolytic capacitor 1 is connected after rectification.
The DC voltage (output voltage) smoothed by 1 is supplied to the output terminal 12.
ダイオード１３と抵抗１４は上記スイソチング１・ラン
ス４の一次側巻線の端子間（ＰＩ、Ｐ２間）に接続され
、スナ八回路を形威している。A diode 13 and a resistor 14 are connected between the terminals of the primary windings of the switch 1 and the lance 4 (between PI and P2), forming a snap circuit.
上記のような回路で構威した直流電源装置の入出力特性
を第２図に示す。図中Ａ点に特性の変化点があり、人力
電圧が高くなっても出力電圧が変化しない（変動が微小
）が、逆に低くなった場合には、出力電圧も直線的に低
下する特性を示す。Figure 2 shows the input/output characteristics of a DC power supply configured with the circuit as described above. There is a characteristic change point at point A in the figure, and even if the human voltage increases, the output voltage does not change (the fluctuation is minute), but when it decreases, the output voltage also decreases linearly. show.
すなわち入力の電源電圧に依存した特性を示す。In other words, it exhibits characteristics that depend on the input power supply voltage.
発明が解決しようとする課題
上述した従来のスイノチング方式の直流電源装置では人
力電圧（商用電ａＡｃＩｏＯＶ）が極端に低下した場合
に二次側出力電圧も同様に低ｒし、負荷回路＠ｌで誤動
作が発生（回路毎６こ正常動作電圧範囲のハラツキがあ
る）する。Problems to be Solved by the Invention In the above-mentioned conventional switching type DC power supply device, when the human power voltage (commercial electricity aAcIoOV) drops extremely, the secondary output voltage also decreases, resulting in malfunction in the load circuit @l. occurs (there are 6 variations in the normal operating voltage range for each circuit).
本発明は」二述した問題点を解決するもので、人力電圧
が極端に低下した場合に出力電圧を発生しないようにす
ることを目白勺とする。The present invention is intended to solve the above-mentioned problems, and its purpose is to prevent the output voltage from being generated when the human power voltage drops extremely.
課題を解決するためのＦ段
本発明は、上記目的を達威ずるためにスイッチングブｊ
式直流電諒公置の発振回路の起動回路に抵抗と定電圧ダ
イオー１”を糺メ合わせて入力電圧検出と駆動回路を兼
ねる回路を構威し、人力電圧が似ドした場合、発振を停
止し、二次｛１１リ出力電圧の発牛をＰＩ１ｌずるよう
乙こしたちのＣある。F-stage for solving the problems The present invention provides a switching block in order to achieve the above object.
A resistor and a constant voltage diode (1") are connected to the starting circuit of the oscillation circuit of the formula DC power supply to create a circuit that also serves as the input voltage detection and drive circuit, and when the human input voltage becomes similar, the oscillation is stopped. , there is a possibility that the output voltage of the secondary output voltage should be changed by PI1l.
作用
本発明は、上記構或により、スイノチング方式直ｌｌｔ
電源装置の発振回路に電圧検出回路を設Ｊｌ、入力電厘
が低下１た場合に、上記発振回路の電圧検出回路が作動
して、発振回路の発振が停正し、次側出力電圧を停止し
、負荷の回路誤動作を保護するものである。Operation The present invention has the above-mentioned structure.
A voltage detection circuit is installed in the oscillation circuit of the power supply.When the input voltage drops by 1, the voltage detection circuit of the oscillation circuit is activated, the oscillation of the oscillation circuit stops, and the next output voltage is stopped. This protects the load from circuit malfunction.
実施例 第１図は、本発明の一実施例の回路図を示す。Example FIG. 1 shows a circuit diagram of an embodiment of the present invention.
図中電源入力端子１には商用電源（ＡＣＩＯＯＶ）が入
力され、整流ダイオード２と平滑用電解コンデン４ノ３
で直流電圧に変換され、スイッチングトランス４の一次
側巻線の端子Ｐ１に供給される。In the figure, a commercial power supply (ACIOOV) is input to power input terminal 1, and rectifier diode 2 and smoothing electrolytic capacitor 4 and 3
The voltage is converted into a DC voltage and supplied to the terminal P1 of the primary winding of the switching transformer 4.
上記一次側巻線の他端子Ｐ２は、出力トランジスタ５の
コレクタに接続され、出力１・ランジスタ５の工ξンタ
は接地されている。出力トランジスタ５のベースには上
記直流電圧より抵抗６と定電圧ダイオート７を介してハ
イアス電圧と、上記スイソチング１・ランス４の１ライ
ブ巻線端子Ｂ１よりダイオード８と抵抗９を介してトラ
イブ電圧が供給され、上記ドライブ巻線端子Ｂ２は接地
されている。The other terminal P2 of the primary winding is connected to the collector of the output transistor 5, and the output 1 terminal of the transistor 5 is grounded. The base of the output transistor 5 receives a high-ass voltage from the above DC voltage via a resistor 6 and a constant voltage diode 7, and a tribe voltage from the 1 live winding terminal B1 of the switch 1/lance 4 via a diode 8 and a resistor 9. The drive winding terminal B2 is grounded.
上記抵抗６と定電圧ダイオード７とスイッチングｌ・ラ
ンス４のドライブ巻線とダイオード８と抵抗９により発
振回路を構威し、出力］・ランジスタ５のベースに駆動
電圧を供給し、一次側の電圧を出力している。The above resistor 6, constant voltage diode 7, switching L-Lance 4's drive winding, diode 8, and resistor 9 form an oscillation circuit, and the output]-The drive voltage is supplied to the base of the transistor 5, and the primary side voltage is outputting.
１二記スイノチングＩ一ランス４の二次側巻線の端子Ｓ
１は接地され、上記二次側巻線の他端子Ｓ２に整流用ダ
イオード１０が接続され、整流後平滑用電解コンデンサ
ＩＩで平滑された直流電圧（出力電圧）が出力端子ｊ２
に供給される。12 Suinoting I - Terminal S of the secondary winding of lance 4
1 is grounded, a rectifying diode 10 is connected to the other terminal S2 of the secondary winding, and the DC voltage (output voltage) smoothed by the smoothing electrolytic capacitor II after rectification is output to the output terminal j2.
is supplied to
ダイオード１３と抵抗１４は上記スイッチング１・ラン
ス４の一次側巻線の端子間（Ｉ）１、！） ２間）に接
続され、スナハ回路を形成している。The diode 13 and the resistor 14 are connected between the terminals of the primary winding of the switching 1 and the lance 4 (I) 1,! ) 2) to form a Snach circuit.
−１−，記構戒で、上記定電圧ダイオーＦ７の閾｛ｉＮ
より高い電圧が入力されている場合、ト記出力１・ラン
ジスタ５のベースに駆動電圧を供給し、発振動作をし二
次側に所定の電圧を発生ずる。逆に上記定電圧ダイオー
ト７の閾値より低い電圧が入力されている場合、上記出
力トランジスタ５のベースに供給ずる電圧を停止し、二
次側の出力電圧を停止する。−1−, the threshold of the voltage regulator diode F7 is expressed as {iN
When a higher voltage is input, a drive voltage is supplied to the output 1 and the base of the transistor 5, and an oscillation operation is performed to generate a predetermined voltage on the secondary side. Conversely, if a voltage lower than the threshold of the constant voltage diode 7 is input, the voltage supplied to the base of the output transistor 5 is stopped, and the output voltage on the secondary side is stopped.
発明の効果
以」二述べたように本発明によれば、スインチング方式
直流電ｔｊ．装置の発振回路部の起動回路に定電圧ダイ
オードを接続し、入力電圧が停止した場合に二次側の出
力電圧の発生を停止するようにしたもので、負荷回路側
での電ａ電圧の減電圧による誤動作を防止することがで
きる。Effects of the Invention As described above, according to the present invention, the switching type DC current tj. A constant voltage diode is connected to the startup circuit of the oscillation circuit section of the device, and when the input voltage stops, the output voltage on the secondary side is stopped from being generated.This reduces the voltage on the load circuit side. Malfunctions due to voltage can be prevented.
第１図は本発明の一実施例における直流電源装置の回路
図、第２図は人力電圧（ＡＣ電圧）対出力電圧の特性を
示す図、第３図は従来の直流電源ｇ置の回路図である。
Ｉ・・・・・・電源人ツノ端子、２・・・・・整流ダイ
オード、３、１１ ・・・・電解コンデンザ、４・・・
・・・スインチングｌ・ランス、５・・・・・・出力１
・ランジスタ、６、９、１４・・・・・・抵抗、７・・
・・・・定電圧ダイオー１・、Ｂ３１０、ｌ３・・・・
ダイオート、１２・・・出力端子。Fig. 1 is a circuit diagram of a DC power supply according to an embodiment of the present invention, Fig. 2 is a diagram showing the characteristics of human power voltage (AC voltage) versus output voltage, and Fig. 3 is a circuit diagram of a conventional DC power supply in g position. It is. I... Power supply horn terminal, 2... Rectifier diode, 3, 11... Electrolytic capacitor, 4...
...Sinching lance, 5...Output 1
・Landister, 6, 9, 14... Resistor, 7...
... Constant voltage diode 1, B310, l3...
Diauto, 12... Output terminal.
Claims (1)
を一次側の電圧源にして、二次側に直流電圧を発生する
ＤＣ−ＤＣコンバータで、上記一次側電圧源から抵抗と
定電圧ダイオードを介して、一次側出力トランジスタの
ベースに起動電圧を供給して発振動作を行い、二次側に
電圧を発生するように構成し、上記商用電源の入力電圧
が任意の電圧値より低くなると上記定電圧ダイオードが
カットオフし、上記一次側出力トランジスタのベース電
圧の供給を停止することにより発振を停止せしめ、二次
側の出力電圧も停止するようにした直流電源装置。A DC-DC converter that inputs commercial power to a rectifier circuit, uses the output voltage of this rectifier circuit as a primary voltage source, and generates DC voltage on the secondary side. is configured to supply a starting voltage to the base of the primary side output transistor to perform oscillation operation and generate a voltage on the secondary side, and when the input voltage of the commercial power supply becomes lower than an arbitrary voltage value, the above A DC power supply device in which a constant voltage diode is cut off to stop supplying the base voltage of the primary side output transistor, thereby stopping oscillation and also stopping the output voltage on the secondary side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30546289A JPH03169258A (en) | 1989-11-24 | 1989-11-24 | Dc power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30546289A JPH03169258A (en) | 1989-11-24 | 1989-11-24 | Dc power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03169258A true JPH03169258A (en) | 1991-07-22 |
Family
ID=17945439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30546289A Pending JPH03169258A (en) | 1989-11-24 | 1989-11-24 | Dc power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03169258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5917714A (en) * | 1997-05-29 | 1999-06-29 | Funai Electric Co., Ltd. | Switching power supply with input voltage reduction detection |
-
1989
- 1989-11-24 JP JP30546289A patent/JPH03169258A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5917714A (en) * | 1997-05-29 | 1999-06-29 | Funai Electric Co., Ltd. | Switching power supply with input voltage reduction detection |
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