JPH0468436U - - Google Patents
Info
- Publication number
- JPH0468436U JPH0468436U JP11094490U JP11094490U JPH0468436U JP H0468436 U JPH0468436 U JP H0468436U JP 11094490 U JP11094490 U JP 11094490U JP 11094490 U JP11094490 U JP 11094490U JP H0468436 U JPH0468436 U JP H0468436U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- thyristor
- converter
- light
- turns
- 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
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 230000005856 abnormality Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Protection Of Static Devices (AREA)
- Dc-Dc Converters (AREA)
Description
第１図は本考案の一実施例のＤＣ−ＤＣコンバ
ータの保護回路を示す回路図、第２図は本考案の
他の実施例の回路図、第３図は従来のＤＣ−ＤＣ
コンバータの保護回路を示す回路図、第４図は従
来回路の動作波形を示す波形図である。
１……入力電源、２……スイツチ、３……補助
電源、４……制御回路、５，８，９，１５，１８
，２４……抵抗、６……サイリスタ、７，１６，
２３……容量、１０……ダイオード、１１……オ
ペアンプ、１２……基準電源、１３，１４……フ
オトカプラ、１７……出力監視回路、１９……負
荷、２０……ＤＣ−ＤＣ変換回路、２１……リレ
ー、２２……リレー接点。
Fig. 1 is a circuit diagram showing a protection circuit of a DC-DC converter according to one embodiment of the present invention, Fig. 2 is a circuit diagram of another embodiment of the present invention, and Fig. 3 is a circuit diagram showing a protection circuit of a DC-DC converter according to an embodiment of the present invention.
FIG. 4 is a circuit diagram showing a protection circuit of a converter. FIG. 4 is a waveform diagram showing operating waveforms of a conventional circuit. 1...Input power supply, 2...Switch, 3...Auxiliary power supply, 4...Control circuit, 5, 8, 9, 15, 18
,24...Resistor, 6...Thyristor, 7,16,
23... Capacitance, 10... Diode, 11... Operational amplifier, 12... Reference power supply, 13, 14... Photocoupler, 17... Output monitoring circuit, 19... Load, 20... DC-DC conversion circuit, 21 ...Relay, 22...Relay contact.
Claims (1)
て、フオトカプラの発光素子を発光させる出力監
視回路と、前記フオトカプラの発光素子が受光す
るとオンとなるサイリスタと、前記サイリスタが
オンとなるとＤＣ−ＤＣ変換動作命令を出力する
制御回路とを備えたＤＣ−ＤＣコンバータの保護
回路において、前記受光素子と前記サイリスタの
ゲートとの間に、遅延時間を与える回路を介在さ
せたことを特徴とするＤＣ−ＤＣコンバータの保
護回路。 an output monitoring circuit that detects an abnormality in the voltage or current supplied to the load and causes a light emitting element of a photocoupler to emit light; a thyristor that turns on when the light emitting element of the photocoupler receives light; and a DC-DC when the thyristor turns on. A protection circuit for a DC-DC converter comprising a control circuit for outputting a conversion operation command, characterized in that a circuit for providing a delay time is interposed between the light receiving element and the gate of the thyristor. Protection circuit for DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11094490U JPH0468436U (en) | 1990-10-23 | 1990-10-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11094490U JPH0468436U (en) | 1990-10-23 | 1990-10-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0468436U true JPH0468436U (en) | 1992-06-17 |
Family
ID=31858351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11094490U Pending JPH0468436U (en) | 1990-10-23 | 1990-10-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0468436U (en) |
-
1990
- 1990-10-23 JP JP11094490U patent/JPH0468436U/ja active Pending