JPS63113969U - - Google Patents
Info
- Publication number
- JPS63113969U JPS63113969U JP451787U JP451787U JPS63113969U JP S63113969 U JPS63113969 U JP S63113969U JP 451787 U JP451787 U JP 451787U JP 451787 U JP451787 U JP 451787U JP S63113969 U JPS63113969 U JP S63113969U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- power supply
- fluctuates
- transformer
- output
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 3
Landscapes
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
- Magnetically Actuated Valves (AREA)
Description
第１図は本考案に係る過電流検出回路の一実施
例を示す回路図、第２図は従来技術の一例を示す
回路図、第３図Ａ，Ｂはそれぞれ入力電源電圧が
低い時と高い時の電流トランスの出力波形を示す
説明図である。
１０……比較器、１２……入力電源、Ｔ……ス
イツチングトランス、Ｑ……スイツチングトラン
ジスタ、ＣＴ……電流トランス、Ｄ，Ｄ１……ダ
イオード、Ｔ１……補助トランス、Ｒ，Ｒ１，Ｒ
２，Ｒ３……抵抗。
Fig. 1 is a circuit diagram showing an example of the overcurrent detection circuit according to the present invention, Fig. 2 is a circuit diagram showing an example of the conventional technology, and Figs. 3 A and B are respectively when the input power supply voltage is low and high. FIG. 3 is an explanatory diagram showing an output waveform of a current transformer at a time. 10...Comparator, 12...Input power supply, T...Switching transformer, Q...Switching transistor, CT...Current transformer, D, D1 ...Diode, T1 ...Auxiliary transformer, R, R 1 ,R
2 , R3 ...Resistance.
Claims (1)
る電流トランスと、その出力を整流するダイオー
ドと、その整流出力のピーク値と定電圧を分圧し
た基準電圧とが入力し、それらを比較して過電流
検出信号を生成する比較器を備えた回路において
、前記比較器の基準電圧入力端に、入力電源電圧
の変動と共に変動する電圧も抵抗を介して同時に
印加されるように接続した過電流検出回路。 ２ 入力電源電圧の変動と共に変動する電圧が、
補助電源のトランスの出力電圧である実用新案登
録請求の範囲第１項記載の回路。[Claims for Utility Model Registration] 1. A current transformer that detects the primary current of a switching transformer, a diode that rectifies its output, and a reference voltage obtained by dividing the peak value of the rectified output and a constant voltage. , in a circuit including a comparator that compares them and generates an overcurrent detection signal, such that a voltage that fluctuates along with fluctuations in the input power supply voltage is simultaneously applied to the reference voltage input terminal of the comparator via a resistor. Overcurrent detection circuit connected to. 2 The voltage that fluctuates as the input power supply voltage fluctuates is
The circuit according to claim 1, which is an output voltage of a transformer of an auxiliary power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP451787U JPH0537253Y2 (en) | 1987-01-16 | 1987-01-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP451787U JPH0537253Y2 (en) | 1987-01-16 | 1987-01-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63113969U true JPS63113969U (en) | 1988-07-22 |
| JPH0537253Y2 JPH0537253Y2 (en) | 1993-09-21 |
Family
ID=30785248
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP451787U Expired - Lifetime JPH0537253Y2 (en) | 1987-01-16 | 1987-01-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0537253Y2 (en) |
-
1987
- 1987-01-16 JP JP451787U patent/JPH0537253Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0537253Y2 (en) | 1993-09-21 |
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