JPS61162250U - - Google Patents
Info
- Publication number
- JPS61162250U JPS61162250U JP4534385U JP4534385U JPS61162250U JP S61162250 U JPS61162250 U JP S61162250U JP 4534385 U JP4534385 U JP 4534385U JP 4534385 U JP4534385 U JP 4534385U JP S61162250 U JPS61162250 U JP S61162250U
- Authority
- JP
- Japan
- Prior art keywords
- overcurrent detection
- current transformer
- diodes
- reference voltage
- generation section
- 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 4
- 238000009499 grossing Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Emergency Protection Circuit Devices (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図はそれによる過負荷特性
を示す説明図、第３図は本考案の他の実施例を示
す回路図、第４図はそれによる過負荷特性を示す
説明図、第５図は従来技術の一例を示す回路図で
ある。
１０……比較増幅器、１２……整流平滑回路、
１４……基準電圧発生部、ＣＴ……電流トンス、
Ｄ３，Ｄ４……ダイオード、Ｃ２……コンデンサ
。
Fig. 1 is a circuit diagram showing one embodiment of the overcurrent detection circuit according to the present invention, Fig. 2 is an explanatory diagram showing the overload characteristics thereof, and Fig. 3 is a circuit diagram showing another embodiment of the present invention. , FIG. 4 is an explanatory diagram showing overload characteristics resulting from this, and FIG. 5 is a circuit diagram showing an example of the prior art. 10... Comparison amplifier, 12... Rectifier smoothing circuit,
14...Reference voltage generation section, CT...Current tons,
D3 , D4 ...Diode, C2 ...Capacitor.
Claims (1)
流トランスと、該電流トランス出力を整流平滑化
するダイオードとコンデンサを含む整流平滑回路
と、その整流平滑化された出力電圧と基準電圧発
生部からの電圧とを比較増幅して過電流検出信号
を出力する比較増幅器を備えている過電流検出回
路において、前記基準電圧発生部には前記整流平
滑回路に用いられているのと同種のダイオードが
組み込まれ、それらのダイオードは前記比較増幅
器の入力端に同じ極性の端子が向くように接続さ
れる過電流検出回路。 Compare the current transformer inserted in the inverter section of the switching power supply, the rectifier and smoothing circuit that includes a diode and capacitor that rectifies and smoothes the output of the current transformer, and the rectified and smoothed output voltage with the voltage from the reference voltage generation section. In an overcurrent detection circuit that includes a comparison amplifier that amplifies and outputs an overcurrent detection signal, the reference voltage generation section includes diodes of the same type as those used in the rectification and smoothing circuit, and these diodes is an overcurrent detection circuit connected to the input terminal of the comparator amplifier so that terminals of the same polarity face.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4534385U JPS61162250U (en) | 1985-03-28 | 1985-03-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4534385U JPS61162250U (en) | 1985-03-28 | 1985-03-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61162250U true JPS61162250U (en) | 1986-10-07 |
Family
ID=30558767
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4534385U Pending JPS61162250U (en) | 1985-03-28 | 1985-03-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61162250U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579219A (en) * | 1980-06-20 | 1982-01-18 | Meidensha Electric Mfg Co Ltd | Ac detecting relay |
-
1985
- 1985-03-28 JP JP4534385U patent/JPS61162250U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS579219A (en) * | 1980-06-20 | 1982-01-18 | Meidensha Electric Mfg Co Ltd | Ac detecting relay |
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