JPS6416132U - - Google Patents
Info
- Publication number
- JPS6416132U JPS6416132U JP10900487U JP10900487U JPS6416132U JP S6416132 U JPS6416132 U JP S6416132U JP 10900487 U JP10900487 U JP 10900487U JP 10900487 U JP10900487 U JP 10900487U JP S6416132 U JPS6416132 U JP S6416132U
- Authority
- JP
- Japan
- Prior art keywords
- input
- circuit
- load
- abnormality
- abnormality detection
- 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
- 230000005856 abnormality Effects 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 4
- 230000008054 signal transmission Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 2
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
Landscapes
- Emergency Protection Circuit Devices (AREA)
Description
第１図はこの考案に係る電源入力保護回路の一
実施例を示すブロツク図、第２図は従来の電源入
力保護回路を示すブロツク図である。
１……入力直流電源、２ａおよび２ｂ……電源
端子、４……突入電流防止回路、５……入力コン
デンサ、６……負荷回路、７……負荷異常検出回
路、８……絶縁形信号伝達素子、９……入力スイ
ツチ、１０……直列抵抗、１１……トランジスタ
、１２および１３……抵抗、１４……サイリスタ
、１５……継電器、１６……駆動用トランジスタ
。
FIG. 1 is a block diagram showing an embodiment of a power input protection circuit according to the present invention, and FIG. 2 is a block diagram showing a conventional power input protection circuit. 1...Input DC power supply, 2a and 2b...Power terminal, 4...Inrush current prevention circuit, 5...Input capacitor, 6...Load circuit, 7...Load abnormality detection circuit, 8...Isolated signal transmission Element, 9...Input switch, 10...Series resistor, 11...Transistor, 12 and 13...Resistor, 14...Thyristor, 15...Relay, 16...Drive transistor.
Claims (1)
電源入力を遮断する電源入力保護回路において、
入力直流電源と突入電流防止回路との間に直列に
接続された直列抵抗、この直列抵抗の電圧がベー
ス・エミツタ間に印加するように接続されたトラ
ンジスタからなる入力電流異常入力遮断回路と、
負荷異常を検出して異常検出信号を出力する負荷
異常検出回路、この異常検出信号を受けて動作す
る絶縁形信号伝達素子からなる出力異常入力遮断
回路とを備え、前記トランジスタの動作でサイリ
スタをターンオフ動作によりあるいは絶縁形信号
伝達素子の動作により駆動用トランジスタを遮断
状態にして直流電源および負荷回路を保護してな
る電源入力保護回路。 In a power input protection circuit that detects abnormal increases in input current and load abnormalities and cuts off power input,
an input current abnormality input cutoff circuit consisting of a series resistor connected in series between an input DC power source and an inrush current prevention circuit, and a transistor connected so that the voltage of the series resistor is applied between the base and emitter;
It is equipped with a load abnormality detection circuit that detects a load abnormality and outputs an abnormality detection signal, and an output abnormality input cutoff circuit consisting of an isolated signal transmission element that operates in response to this abnormality detection signal, and turns off the thyristor by the operation of the transistor. A power supply input protection circuit that protects a DC power supply and load circuit by cutting off a driving transistor by operation or by operation of an isolated signal transmission element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10900487U JPS6416132U (en) | 1987-07-17 | 1987-07-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10900487U JPS6416132U (en) | 1987-07-17 | 1987-07-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6416132U true JPS6416132U (en) | 1989-01-26 |
Family
ID=31344864
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10900487U Pending JPS6416132U (en) | 1987-07-17 | 1987-07-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6416132U (en) |
-
1987
- 1987-07-17 JP JP10900487U patent/JPS6416132U/ja active Pending