CN205265224U - Current foldback circuit - Google Patents
Current foldback circuit Download PDFInfo
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- CN205265224U CN205265224U CN201520940148.3U CN201520940148U CN205265224U CN 205265224 U CN205265224 U CN 205265224U CN 201520940148 U CN201520940148 U CN 201520940148U CN 205265224 U CN205265224 U CN 205265224U
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Abstract
The utility model provides a current foldback circuit, includes U1, U2 and U3, U1, U2 and U3 interconnect constitute the protection circuit, U1 comprises the TRANS3 mutual -inductor, and U2 comprises 7812 mutual -inductors, and U3 comprises the LM358 -1 mutual -inductor, compared with the prior art, the utility model discloses following beneficial effect has: except that having high voltage conversion, the voltage ratio is exported than the function in addition, and the usage is very extensive, and the frequency characteristic, gain, the passband that can be used to the test or overhaul the low frequency amplifier in the various electronic instrument equipment also can be used as protection circuits high and various electronic instrument, and in industry, civilian class of equipment has wide usage.
Description
Technical field
The utility model is a kind of current foldback circuit, belongs to Electronic Protection field.
Background technology
More and more at the electronic equipment of Technology for Modern Equipment, and condition of work is more severe than general electronic product, as running car situation with environment is fast changing, can produce very large transient peak voltage etc. when automobile start. Therefore,, being in the supporting power supply adaptor of these electronic equipments, generally all need to install overcurrent and overvoltage protection element simultaneously. ) according to statistics, in the fault occurring at electronic product, have 75% because overcurrent/overvoltage causes. IBM once analyzed the failure cause of computer power supply, and wherein 88.5% because overcurrent/overvoltage causes. Along with overcritical to Quality of electronic products of people, manufacturing firm, in order to improve the market competitiveness, just must adopt circuit protecting elements in a large number. The components and parts of protection in electronic circuit are not damaged in the situations such as overvoltage, overcurrent, surge, electromagnetic interference being subject to; along with scientific and technical development; electric power/electronic product is variation, complicated day by day; the own non-simple glass tube fuse in the past of applied circuit protecting element, protection device has piezo-resistance, TVS, gas-discharge tube etc. conventionally. Current foldback circuit is own through developing into a new electronics direction field of a great variety.
Utility model content
The deficiency existing for prior art, the utility model object is to provide a kind of current foldback circuit, and to solve the problem proposing in above-mentioned background technology, the utility model is easy to use, convenient operation, good stability, reliability is high.
To achieve these goals, the utility model is to realize by the following technical solutions: a kind of current foldback circuit, comprise U1, U2 and U3, and described U1, U2 and U3 are interconnected to constitute holding circuit; U1 is made up of TRANS3 transformer, and U2 is made up of 7812 transformers, and U3 is made up of LM358-1 transformer; One end of the T1 mono-pin connecting valve S1 of described TRANS3 transformer, another pin of switch S 1 connects a pin of fuse F3, a pin of another pin connecting valve S8 of fuse F3, another pin of switch S 8 connects A phase, one end of another pin connecting luminous diode of the T1 of TRANS3 transformer DS1, a pin of another pin connecting valve S5 of diode DS1, another pin of switch S 5 connects external power source zero line N; One end of the T2 mono-pin connecting valve S2 of TRANS3 transformer, another pin of switch S 2 connects a pin of fuse F2, a pin of another pin connecting valve S7 of fuse F2, another pin of switch S 7 connects external power source C phase, one end of another pin connecting luminous diode of the T2 of TRANS3 transformer DS2, a pin of another pin connecting valve S5 of diode DS2, another pin of switch S 5 connects external power source zero line N; One end of the T3 mono-pin connecting valve S3 of TRANS3 transformer, another pin of switch S 3 connects a pin of fuse F1, a pin of another pin connecting valve S6 of fuse F1, another pin of switch S 6 connects external power source C phase, one end of another pin connecting luminous diode of the T3 of TRANS3 transformer DS3, a pin of another pin connecting valve S5 of diode DS3, another pin of switch S 5 connects external power source zero line N; The T1 mono-pin ground connection of TRANS3 transformer, another pin connects the anode of diode D2, and another pin negative terminal of diode D2 connects the negative terminal of diode D3, D7; The T2 mono-pin ground connection of TRANS3 transformer, another pin connects the negative terminal of diode D3, D5; The positive ending grounding of diode D5; The negative terminal of diode D3 connects the negative terminal of diode D2, D7; A pin ground connection of the T3 of TRANS3 transformer, another pin connects the anode of diode D7 and the negative terminal of diode D8, and the negative terminal of diode D7 connects the negative terminal of diode D2 and D3, the positive ending grounding of diode D8, switch S 4 one pin connect contactor 13, and another pin connects contactor 14; Contactor 14 connects contactor coil A2; 1 pin of described 7812 transformers connects the anode of capacitor C 3 and a pin of capacitor C 1; The negativing ending grounding of capacitor C 1 another pin and capacitor C 3; 1 pin of 7812 transformers connects 2 pin of rectifier bridge stack D1; 2 pin of 7812 transformers connect ground; 3 pin of 7812 transformers connect the anode of capacitor C 4, the negativing ending grounding of capacitor C 4; 3 pin of 7812 transformers connect a pin of capacitor C 2, another pin ground connection of capacitor C 2; 3 pin of 7812 transformers connect power supply 12V; 1 pin of rectifier bridge stack D1 connects alternating current 15V one end, and 3 pin of rectifier bridge stack D1 connect the alternating current 15V other end, and 4 pin of rectifier bridge stack D1 connect ground; 1 pin of the U2A of described LM358-1 transformer connects the anode of diode D9, and the negative terminal of diode D9 is connected to a pin of resistance R 4, and another pin of resistance R 4 is connected to the base stage of triode Q1; The centre cap of the 2 pin contact resistance device R3 of the U2A of LM358-1 transformer, a pin ground connection of resistor R3, another pin of resistor R3 is connected to a pin of resistance R 2, and another pin of resistance R 2 connects power supply; 3 pin of the U2A of LM358-1 transformer are connected to a pin of resistance R 1, R6, and another pin of resistance R 1 is connected to anode and capacitor C 6 one pin of electrochemical capacitor C5, the negativing ending grounding of electrochemical capacitor C5, and another pin of capacitor C 6 connects ground; 4 pin of the U2A of LM358-1 transformer connect ground; 8 pin of the U2A of LM358-1 transformer connect power supply; 1 pin of relay K 1 is connected to the anode of the colelctor electrode of triode Q1 and a pin of resistance R 5 and diode D6; Another pin of resistance R 5 connects the negative terminal of diode D14, and the negative terminal of diode D6 is connected power supply 12V with the anode of diode D14; A pin of 2 pin connecting valve S2 of relay K 1, another pin of S2 connects ground; 3 pin of relay K 1 are unsettled; 4 pin of relay K 1 connect the anode of diode D10 and diode D11, and the negative terminal of diode D10 connects a pin of loudspeaker LS1, and another pin of loudspeaker LS1 connects ground; 5 pin of relay K 1 connect power supply 12V; 6 pin of relay K 1 connect unsettled; 7 pin of relay K 1 connect 1 pin of relay K 1; A pin of 8 pin contact resistance R7 of relay K 1, another pin of resistance R 7 connects power supply 12V; 1 pin of relay K 2 is connected 380V with 2 pin; 3 pin of relay K 2 are unsettled; 4 pin of relay K 2 and 6 pin are connected to a pin of switch S 3, a pin of another pin connecting valve S4 of switch S 3, and another pin of switch S 4 connects contactor 13; 5 pin of relay K 2 are unsettled; 7 pin of relay K 2 connect ground; 8 pin of relay K 2 connect the negative terminal of diode D11, D12, D13, and diode D11 connects 4 pin of relay K 1, and the anode of diode D12 connects ground, and the anode of diode D13 connects control end.
The beneficial effects of the utility model: a kind of current foldback circuit of the present utility model; except having high voltage conversion; also has voltage ratio compared with fuction output; purposes is very extensive; the frequency characteristic, gain, the passband that can be used for test or overhaul the low-frequency amplifier in various electronic equipments; also can be used as the holding circuit of high and various electronic instruments, in industry, the civilian equipment that waits has wide purposes.
Brief description of the drawings
By reading the detailed description of non-limiting example being done with reference to the following drawings, it is more obvious that other features, objects and advantages of the present utility model will become:
Fig. 1 is the structural representation of a kind of current foldback circuit of the utility model;
Detailed description of the invention
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with detailed description of the invention, further set forth the utility model.
Refer to Fig. 1, the utility model provides a kind of technical scheme: a kind of current foldback circuit, comprise U1, U2 and U3, and U1, U2 and U3 are interconnected to constitute holding circuit; U1 is made up of TRANS3 transformer, and U2 is made up of 7812 transformers, and U3 is made up of LM358-1 transformer;
One end of the T1 mono-pin connecting valve S1 of TRANS3 transformer, another pin of switch S 1 connects a pin of fuse F3, a pin of another pin connecting valve S8 of fuse F3, another pin of switch S 8 connects A phase, one end of another pin connecting luminous diode of the T1 of TRANS3 transformer DS1, a pin of another pin connecting valve S5 of diode DS1, another pin of switch S 5 connects external power source zero line N; One end of the T2 mono-pin connecting valve S2 of TRANS3 transformer, another pin of switch S 2 connects a pin of fuse F2, a pin of another pin connecting valve S7 of fuse F2, another pin of switch S 7 connects external power source C phase, one end of another pin connecting luminous diode of the T2 of TRANS3 transformer DS2, a pin of another pin connecting valve S5 of diode DS2, another pin of switch S 5 connects external power source zero line N; One end of the T3 mono-pin connecting valve S3 of TRANS3 transformer, another pin of switch S 3 connects a pin of fuse F1, a pin of another pin connecting valve S6 of fuse F1, another pin of switch S 6 connects external power source C phase, one end of another pin connecting luminous diode of the T3 of TRANS3 transformer DS3, a pin of another pin connecting valve S5 of diode DS3, another pin of switch S 5 connects external power source zero line N; The T1 mono-pin ground connection of TRANS3 transformer, another pin connects the anode of diode D2, and another pin negative terminal of diode D2 connects the negative terminal of diode D3, D7; The T2 mono-pin ground connection of TRANS3 transformer, another pin connects the negative terminal of diode D3, D5; The positive ending grounding of diode D5; The negative terminal of diode D3 connects the negative terminal of diode D2, D7; A pin ground connection of the T3 of TRANS3 transformer, another pin connects the anode of diode D7 and the negative terminal of diode D8, and the negative terminal of diode D7 connects the negative terminal of diode D2 and D3, the positive ending grounding of diode D8, switch S 4 one pin connect contactor 13, and another pin connects contactor 14; Contactor 14 connects contactor coil A2;
1 pin of 7812 transformers connects the anode of capacitor C 3 and a pin of capacitor C 1; The negativing ending grounding of capacitor C 1 another pin and capacitor C 3; 1 pin of 7812 transformers connects 2 pin of rectifier bridge stack D1; 2 pin of 7812 transformers connect ground; 3 pin of 7812 transformers connect the anode of capacitor C 4, the negativing ending grounding of capacitor C 4; 3 pin of 7812 transformers connect a pin of capacitor C 2, another pin ground connection of capacitor C 2; 3 pin of 7812 transformers connect power supply 12V; 1 pin of rectifier bridge stack D1 connects alternating current 15V one end, and 3 pin of rectifier bridge stack D1 connect the alternating current 15V other end, and 4 pin of rectifier bridge stack D1 connect ground;
1 pin of the U2A of LM358-1 transformer connects the anode of diode D9, and the negative terminal of diode D9 is connected to a pin of resistance R 4, and another pin of resistance R 4 is connected to the base stage of triode Q1; The centre cap of the 2 pin contact resistance device R3 of the U2A of LM358-1 transformer, a pin ground connection of resistor R3, another pin of resistor R3 is connected to a pin of resistance R 2, and another pin of resistance R 2 connects power supply; 3 pin of the U2A of LM358-1 transformer are connected to a pin of resistance R 1, R6, and another pin of resistance R 1 is connected to anode and capacitor C 6 one pin of electrochemical capacitor C5, the negativing ending grounding of electrochemical capacitor C5, and another pin of capacitor C 6 connects ground; 4 pin of the U2A of LM358-1 transformer connect ground; 8 pin of the U2A of LM358-1 transformer connect power supply; 1 pin of relay K 1 is connected to the anode of the colelctor electrode of triode Q1 and a pin of resistance R 5 and diode D6; Another pin of resistance R 5 connects the negative terminal of diode D14, and the negative terminal of diode D6 is connected power supply 12V with the anode of diode D14; A pin of 2 pin connecting valve S2 of relay K 1, another pin of S2 connects ground; 3 pin of relay K 1 are unsettled; 4 pin of relay K 1 connect the anode of diode D10 and diode D11, and the negative terminal of diode D10 connects a pin of loudspeaker LS1, and another pin of loudspeaker LS1 connects ground; 5 pin of relay K 1 connect power supply 12V; 6 pin of relay K 1 connect unsettled; 7 pin of relay K 1 connect 1 pin of relay K 1; A pin of 8 pin contact resistance R7 of relay K 1, another pin of resistance R 7 connects power supply 12V; 1 pin of relay K 2 is connected 380V with 2 pin; 3 pin of relay K 2 are unsettled; 4 pin of relay K 2 and 6 pin are connected to a pin of switch S 3, a pin of another pin connecting valve S4 of switch S 3, and another pin of switch S 4 connects contactor 13; 5 pin of relay K 2 are unsettled; 7 pin of relay K 2 connect ground; 8 pin of relay K 2 connect the negative terminal of diode D11, D12, D13, and diode D11 connects 4 pin of relay K 1, and the anode of diode D12 connects ground, and the anode of diode D13 connects control end.
A kind of current foldback circuit of the present utility model; except having high voltage conversion; also has voltage ratio compared with fuction output; purposes is very extensive; the frequency characteristic, gain, the passband that can be used for test or overhaul the low-frequency amplifier in various electronic equipments; also can be used as the holding circuit of high and various electronic instruments, in industry, the civilian equipment that waits has wide purposes.
More than show and described general principle of the present utility model and principal character and advantage of the present utility model, to those skilled in the art, obviously the utility model is not limited to the details of above-mentioned example embodiment, and in the situation that not deviating from spirit of the present utility model or essential characteristic, can realize the utility model with other concrete form. Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, is therefore intended to all changes that drop in the implication and the scope that are equal to important document of claim to include in the utility model. Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this description is described according to embodiment, but be not that each embodiment only comprises an independently technical scheme, this narrating mode of description is only for clarity sake, those skilled in the art should make description as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (1)
1. a current foldback circuit, comprises U1, U2 and U3, it is characterized in that: described U1, U2 and U3 are interconnected to constitute holding circuit; U1 is made up of TRANS3 transformer, and U2 is made up of 7812 transformers, and U3 is made up of LM358-1 transformer;
One end of the T1 mono-pin connecting valve S1 of described TRANS3 transformer, another pin of switch S 1 connects a pin of fuse F3, a pin of another pin connecting valve S8 of fuse F3, another pin of switch S 8 connects A phase, one end of another pin connecting luminous diode of the T1 of TRANS3 transformer DS1, a pin of another pin connecting valve S5 of diode DS1, another pin of switch S 5 connects external power source zero line N; One end of the T2 mono-pin connecting valve S2 of TRANS3 transformer, another pin of switch S 2 connects a pin of fuse F2, a pin of another pin connecting valve S7 of fuse F2, another pin of switch S 7 connects external power source C phase, one end of another pin connecting luminous diode of the T2 of TRANS3 transformer DS2, a pin of another pin connecting valve S5 of diode DS2, another pin of switch S 5 connects external power source zero line N; One end of the T3 mono-pin connecting valve S3 of TRANS3 transformer, another pin of switch S 3 connects a pin of fuse F1, a pin of another pin connecting valve S6 of fuse F1, another pin of switch S 6 connects external power source C phase, one end of another pin connecting luminous diode of the T3 of TRANS3 transformer DS3, a pin of another pin connecting valve S5 of diode DS3, another pin of switch S 5 connects external power source zero line N; The T1 mono-pin ground connection of TRANS3 transformer, another pin connects the anode of diode D2, and another pin negative terminal of diode D2 connects the negative terminal of diode D3, D7; The T2 mono-pin ground connection of TRANS3 transformer, another pin connects the negative terminal of diode D3, D5; The positive ending grounding of diode D5; The negative terminal of diode D3 connects the negative terminal of diode D2, D7; A pin ground connection of the T3 of TRANS3 transformer, another pin connects the anode of diode D7 and the negative terminal of diode D8, and the negative terminal of diode D7 connects the negative terminal of diode D2 and D3, the positive ending grounding of diode D8, switch S 4 one pin connect contactor 13, and another pin connects contactor 14; Contactor 14 connects contactor coil A2;
1 pin of described 7812 transformers connects the anode of capacitor C 3 and a pin of capacitor C 1; The negativing ending grounding of capacitor C 1 another pin and capacitor C 3; 1 pin of 7812 transformers connects 2 pin of rectifier bridge stack D1; 2 pin of 7812 transformers connect ground; 3 pin of 7812 transformers connect the anode of capacitor C 4, the negativing ending grounding of capacitor C 4; 3 pin of 7812 transformers connect a pin of capacitor C 2, another pin ground connection of capacitor C 2; 3 pin of 7812 transformers connect power supply 12V; 1 pin of rectifier bridge stack D1 connects alternating current 15V one end, and 3 pin of rectifier bridge stack D1 connect the alternating current 15V other end, and 4 pin of rectifier bridge stack D1 connect ground;
1 pin of the U2A of described LM358-1 transformer connects the anode of diode D9, and the negative terminal of diode D9 is connected to a pin of resistance R 4, and another pin of resistance R 4 is connected to the base stage of triode Q1; The centre cap of the 2 pin contact resistance device R3 of the U2A of LM358-1 transformer, a pin ground connection of resistor R3, another pin of resistor R3 is connected to a pin of resistance R 2, and another pin of resistance R 2 connects power supply; 3 pin of the U2A of LM358-1 transformer are connected to a pin of resistance R 1, R6, and another pin of resistance R 1 is connected to anode and capacitor C 6 one pin of electrochemical capacitor C5, the negativing ending grounding of electrochemical capacitor C5, and another pin of capacitor C 6 connects ground; 4 pin of the U2A of LM358-1 transformer connect ground; 8 pin of the U2A of LM358-1 transformer connect power supply; 1 pin of relay K 1 is connected to the anode of the colelctor electrode of triode Q1 and a pin of resistance R 5 and diode D6; Another pin of resistance R 5 connects the negative terminal of diode D14, and the negative terminal of diode D6 is connected power supply 12V with the anode of diode D14; A pin of 2 pin connecting valve S2 of relay K 1, another pin of S2 connects ground; 3 pin of relay K 1 are unsettled; 4 pin of relay K 1 connect the anode of diode D10 and diode D11, and the negative terminal of diode D10 connects a pin of loudspeaker LS1, and another pin of loudspeaker LS1 connects ground; 5 pin of relay K 1 connect power supply 12V; 6 pin of relay K 1 connect unsettled; 7 pin of relay K 1 connect 1 pin of relay K 1; A pin of 8 pin contact resistance R7 of relay K 1, another pin of resistance R 7 connects power supply 12V; 1 pin of relay K 2 is connected 380V with 2 pin; 3 pin of relay K 2 are unsettled; 4 pin of relay K 2 and 6 pin are connected to a pin of switch S 3, a pin of another pin connecting valve S4 of switch S 3, and another pin of switch S 4 connects contactor 13; 5 pin of relay K 2 are unsettled; 7 pin of relay K 2 connect ground; 8 pin of relay K 2 connect the negative terminal of diode D11, D12, D13, and diode D11 connects 4 pin of relay K 1, and the anode of diode D12 connects ground, and the anode of diode D13 connects control end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520940148.3U CN205265224U (en) | 2015-11-20 | 2015-11-20 | Current foldback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520940148.3U CN205265224U (en) | 2015-11-20 | 2015-11-20 | Current foldback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205265224U true CN205265224U (en) | 2016-05-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520940148.3U Expired - Fee Related CN205265224U (en) | 2015-11-20 | 2015-11-20 | Current foldback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205265224U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947558A (en) * | 2017-12-06 | 2018-04-20 | 英特尔产品（成都）有限公司 | AC-AC Conversion device and control circuit |
-
2015
- 2015-11-20 CN CN201520940148.3U patent/CN205265224U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107947558A (en) * | 2017-12-06 | 2018-04-20 | 英特尔产品（成都）有限公司 | AC-AC Conversion device and control circuit |
| CN107947558B (en) * | 2017-12-06 | 2019-01-01 | 英特尔产品（成都）有限公司 | AC-AC converter device and control circuit |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 Termination date: 20201120 |