JPH0451086U - - Google Patents
Info
- Publication number
- JPH0451086U JPH0451086U JP9044590U JP9044590U JPH0451086U JP H0451086 U JPH0451086 U JP H0451086U JP 9044590 U JP9044590 U JP 9044590U JP 9044590 U JP9044590 U JP 9044590U JP H0451086 U JPH0451086 U JP H0451086U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- switching element
- switching
- circuit
- frequency
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims 3
- 238000009499 grossing Methods 0.000 claims 1
- 230000006641 stabilisation Effects 0.000 claims 1
- 238000011105 stabilization Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 2
Landscapes
- Dc-Dc Converters (AREA)
Description
第１図は本考案を説明する構成ブロツク図、第
２図は本考案の一実施例を示す回路図、第３図は
入力電圧検出回路２０の動作説明図、第４図は電
圧／周波数変換部３０の動作説明図、第５図はス
イツチング損失率ηＬＯＳＳと入力電圧Ｅｉｎの
関係図、第６図は具体的な回路で実験した結果の
説明図である。第７図は従来の直流安定化電源の
特性図である。
１０……コンバータ部、２０……入力電圧検出
回路、３０……電圧／周波数変換部。
Fig. 1 is a configuration block diagram explaining the present invention, Fig. 2 is a circuit diagram showing an embodiment of the present invention, Fig. 3 is an explanatory diagram of the operation of the input voltage detection circuit 20, and Fig. 4 is voltage/frequency conversion. 5 is a diagram illustrating the relationship between the switching loss rate ηLOSS and the input voltage E in , and FIG. 6 is a diagram illustrating the results of an experiment using a specific circuit. FIG. 7 is a characteristic diagram of a conventional DC stabilized power supply. 10... converter section, 20... input voltage detection circuit, 30... voltage/frequency conversion section.
Claims (1)
接続されたスイツチング素子によりオンオフして
二次巻線にスイツチング信号を誘起し、この誘起
された信号を整流平滑化回路により直流電圧にし
て出力すると共に、この出力される直流電圧を所
定電圧に安定化する制御信号を当該スイツチング
素子に送る出力電圧安定化回路とを有するコンバ
ータ部、 この入力電圧を検出する回路、 この入力電圧検出回路の検出した信号と所定の
基準電圧とを比較し、基準電圧以下であれば予め
定められたスイツチング周波数で前記スイツチン
グ素子をオンオフし、基準電圧を超過したときは
超過量に応じて前記スイツチング周波数よりも低
く定められる周波数で前記スイツチング素子をオ
ンオフする電圧／周波数変換部、 を具備することを特徴とする直流安定化電源の過
大入力電圧保護回路。[Claims for Utility Model Registration] Input voltage is applied to the primary winding, a switching element connected to the primary winding is turned on and off to induce a switching signal in the secondary winding, and this induced signal is rectified. A converter section that has an output voltage stabilization circuit that converts the output DC voltage into a DC voltage using a smoothing circuit and sends a control signal to the switching element to stabilize the output DC voltage to a predetermined voltage; The circuit compares the signal detected by this input voltage detection circuit with a predetermined reference voltage, and if it is less than the reference voltage, turns on and off the switching element at a predetermined switching frequency, and if it exceeds the reference voltage, it turns on and off the switching element by the amount of excess. An excessive input voltage protection circuit for a DC stabilized power supply, comprising: a voltage/frequency converter that turns on and off the switching element at a frequency determined to be lower than the switching frequency according to the switching frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9044590U JPH0451086U (en) | 1990-08-29 | 1990-08-29 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9044590U JPH0451086U (en) | 1990-08-29 | 1990-08-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0451086U true JPH0451086U (en) | 1992-04-30 |
Family
ID=31825208
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9044590U Pending JPH0451086U (en) | 1990-08-29 | 1990-08-29 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0451086U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08127339A (en) * | 1994-10-28 | 1996-05-21 | West Japan Railway Co | Vehicle full water detecting device |
-
1990
- 1990-08-29 JP JP9044590U patent/JPH0451086U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08127339A (en) * | 1994-10-28 | 1996-05-21 | West Japan Railway Co | Vehicle full water detecting device |