CN206340956U - A kind of electric device fault secure circuit - Google Patents
A kind of electric device fault secure circuit Download PDFInfo
- Publication number
- CN206340956U CN206340956U CN201720035878.8U CN201720035878U CN206340956U CN 206340956 U CN206340956 U CN 206340956U CN 201720035878 U CN201720035878 U CN 201720035878U CN 206340956 U CN206340956 U CN 206340956U
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- resistance
- triode
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- thermistor
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Abstract
The utility model discloses a kind of electric device fault secure circuit of protection circuit technical field, including electrode input end mouthful A, the electrode input end mouthful A is simultaneously connected to resistance R1 inputs, triode D1 emitter stages, resistance R2 inputs and electric capacity C1 top crowns, the output end of the resistance R1 is simultaneously connected to triode D1 base stage and large power triode D2 emitter stage, it is variable resistor R3 by resistance R3, resistance is adjustable, convenient and thermistor R0 is used cooperatively, improve the overtemperature protection scope of circuit, electric capacity C1 is multi-layer ceramic capacitance C1, capacity is big, dependable performance, high temperature resistant, thermistor R0 is critical temperature thermistor R0, susceptibility is high, it is easy to the external temperature control warning device of circuit simultaneously, the circuit is easy to use, occurs overvoltage to electric device, it can be powered off in time during under-voltage and superheating phenomenon, avoid damaging circuit.
Description
Technical field
The utility model is related to protection of field of circuit technology, specially a kind of electric device fault secure circuit.
Background technology
The operating voltage of electrical equipment has a safe range, and super go beyond the scope of mains fluctuations can cause electrically
Equipment job insecurity is even damaged, and present every household all installed electric protective device, break down in home circuit or
Person's overload makes meeting automatic trip to protect the safety of household electricity, still, overtemperature protection effect of the contact protector for circuit
It is poor, while superheating phenomenon can often occur in the line, therefore, I proposes a kind of electric device fault secure circuit.
Utility model content
The purpose of this utility model is to provide a kind of electric device fault secure circuit, to solve in above-mentioned background technology
What is proposed need to carry out the problem of voltage and overtemperature protection to electric device voltage pulsation and circuit overheat.
To achieve the above object, the utility model provides following technical scheme：A kind of electric device fault secure circuit, bag
Include electrode input end mouthful A, the electrode input end mouthful A and be connected to resistance R1 inputs, triode D1 emitter stages, resistance R2 inputs
End and electric capacity C1 top crowns, the output end of the resistance R1 are simultaneously connected to triode D1 base stage and large power triode D2 transmitting
Pole, the output end of the resistance R2 is simultaneously connected to the 1 of triode D1 colelctor electrode, large power triode D2 base stage and voltage-stablizer P1
Number interface, the bottom crown of the electric capacity C1 is simultaneously connected to negative input mouthful A, voltage-stablizer P1 No. 2 interfaces and cathode output end mouthful
B, the large power triode D2 collector series connection have thermistor R0 inputs, the output end concatenation of the thermistor R0
There is triode D3 emitter stage, the base stage of the triode D3 is serially connected with voltage-stablizer P1 No. 3 interfaces, the collection of the triode D3
Electrode is serially connected with resistance R3 inputs, and the output end of the resistance R3 is serially connected with cathode output end mouthful B.
It is preferred that, the resistance R3 is variable resistor R3.
It is preferred that, the electric capacity C1 is multi-layer ceramic capacitance C1.
It is preferred that, the thermistor R0 is critical temperature thermistor R0.
Compared with prior art, the beneficial effects of the utility model are：The circuit uses some simple, cheap electronics members
Part, constitutes a kind of stable electric device fault secure circuit of simple in construction, performance, among power equipment, greatly side
People use, be variable resistor R3 by resistance R3, resistance is adjustable, convenient and thermistor R0 is used cooperatively, improve
The overtemperature protection scope of circuit, electric capacity C1 is multi-layer ceramic capacitance C1, and capacity is big, dependable performance, high temperature resistant, and thermistor R0 is
Critical temperature thermistor R0, susceptibility is high, while being easy to the external temperature control warning device of circuit, the circuit is easy to use, to electricity
Power apparatus occurs to power off in time during over-pressed, under-voltage and superheating phenomenon, it is to avoid damage circuit.
Brief description of the drawings
Fig. 1 is the utility model circuit diagram.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of the utility model protection.
Referring to Fig. 1, the utility model provides a kind of technical scheme：A kind of electric device fault secure circuit, including just
Pole input port A, the electrode input end mouthful A and be connected to resistance R1 inputs, triode D1 emitter stages, resistance R2 inputs and
Electric capacity C1 top crowns, the output end of the resistance R1 is simultaneously connected to triode D1 base stage and large power triode D2 emitter stage,
The output end of the resistance R2 is simultaneously connected to No. 1 of triode D1 colelctor electrode, large power triode D2 base stage and voltage-stablizer P1
Interface, the bottom crown of the electric capacity C1 is simultaneously connected to negative input mouthful A, voltage-stablizer P1 No. 2 interfaces and cathode output end mouthful B,
The collector series connection of the large power triode D2 has thermistor R0 inputs, and the output end of the thermistor R0 is serially connected with
Triode D3 emitter stage, the base stage of the triode D3 is serially connected with voltage-stablizer P1 No. 3 interfaces, the current collection of the triode D3
Pole is serially connected with resistance R3 inputs, and the output end of the resistance R3 is serially connected with cathode output end mouthful B.
Wherein, the resistance R3 is variable resistor R3, and resistance is adjustable, and convenient and thermistor R0 is used cooperatively, and improves electricity
The overtemperature protection scope on road, the electric capacity C1 is multi-layer ceramic capacitance C1, and capacity is big, dependable performance, high temperature resistant, the temperature-sensitive electricity
Resistance R0 is critical temperature thermistor R0, and susceptibility is high, while being easy to the external temperature control warning device of circuit.
Operation principle：Pass through resistance R1, R2, large power triode D2 again after the rectification coupling that input power passes through electric capacity C1
The voltage of power supply is protected with voltage-stablizer P1, it is to avoid under-voltage, overvoltage, utilize thermistor R0, triode D3 and resistance R3
Overtemperature protection is carried out to circuit, resistance R3 is variable resistor R3, and resistance is adjustable, and convenient and thermistor R0 is used cooperatively, and is improved
The overtemperature protection scope of circuit, electric capacity C1 is multi-layer ceramic capacitance C1, and capacity is big, dependable performance, high temperature resistant, and thermistor R0 is
Critical temperature thermistor R0, susceptibility is high, while being easy to the external temperature control warning device of circuit, the circuit is easy to use, to electricity
Power apparatus occurs to power off in time during over-pressed, under-voltage and superheating phenomenon, it is to avoid damage circuit.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out in the case where not departing from principle of the present utility model and spirit a variety of changes, repaiies
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of electric device fault secure circuit, including electrode input end mouthful A, it is characterised in that：The electrode input end mouthful A
And it is connected to resistance R1 inputs, triode D1 emitter stages, resistance R2 inputs and electric capacity C1 top crowns, the output of the resistance R1
Hold and be connected to triode D1 base stage and large power triode D2 emitter stage, the output end of the resistance R2 is simultaneously connected to triode
No. 1 interface of D1 colelctor electrode, large power triode D2 base stage and voltage-stablizer P1, the bottom crown of the electric capacity C1 is simultaneously connected to negative
Pole input port A, voltage-stablizer P1 No. 2 interfaces and cathode output end mouthful B, the collector series connection of the large power triode D2 have
Thermistor R0 inputs, the output end of the thermistor R0 is serially connected with triode D3 emitter stage, the triode D3's
Base stage is serially connected with voltage-stablizer P1 No. 3 interfaces, and the collector series connection of the triode D3 has resistance R3 inputs, the resistance R3
Output end be serially connected with cathode output end mouthful B.
2. a kind of electric device fault secure circuit according to claim 1, it is characterised in that：The resistance R3 is variable
Resistance R3.
3. a kind of electric device fault secure circuit according to claim 1, it is characterised in that：The electric capacity C1 is multilayer
Ceramic condenser C1.
4. a kind of electric device fault secure circuit according to claim 1, it is characterised in that：The thermistor R0 is
Critical temperature thermistor R0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720035878.8U CN206340956U (en) | 2017-01-12 | 2017-01-12 | A kind of electric device fault secure circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720035878.8U CN206340956U (en) | 2017-01-12 | 2017-01-12 | A kind of electric device fault secure circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206340956U true CN206340956U (en) | 2017-07-18 |
Family
ID=59304631
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720035878.8U Expired - Fee Related CN206340956U (en) | 2017-01-12 | 2017-01-12 | A kind of electric device fault secure circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206340956U (en) |
-
2017
- 2017-01-12 CN CN201720035878.8U patent/CN206340956U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170718 Termination date: 20180112 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |