CN101442199A - Electronic breaker - Google Patents
Electronic breaker Download PDFInfo
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- CN101442199A CN101442199A CNA2008100425985A CN200810042598A CN101442199A CN 101442199 A CN101442199 A CN 101442199A CN A2008100425985 A CNA2008100425985 A CN A2008100425985A CN 200810042598 A CN200810042598 A CN 200810042598A CN 101442199 A CN101442199 A CN 101442199A
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Abstract
The invention provides an electronic-type circuit breaker, which consists of a signal collector, a power supply source, an amplification unit, an excitation unit and a power driving unit, wherein the signal collector is serially connected with a main power loop; the signal collector is connected with the positive input end of the amplification unit; the output end of the amplification unit is connected with the excitation unit; the excitation unit consists of a switching element; the output end of the excitation unit is connected with the input end of the power driving unit; and a load is connected with an output loop of the power driving unit. As the electronic-type circuit breaker consists of electronic components, and as the sampling of current signals and the output control on switch motions are both realized by the electronic components, the circuit breaker can not falsely act under the influence of ambient temperature or produce arcs, so that the service life of the circuit breaker is prolonged.
Description
Technical field:
The present invention relates to electricity field, relate in particular to overcurrent protection, overvoltage, earth leakage protective miniature circuit breaker, particularly a kind of electronic breaker.
Background technology:
In the prior art, circuit breaker is to sense the heat that electric current produces by bimetallic element to realize that under the effect of heat, circuit breaker produces disjunction from the action of the disjunction of threading off.Ambient temperature when the external world raises, and heat transferred is to circuit breaker inside, and two gold rise the genus element can produce directed displacement too, also forces the circuit breaker free tripping mechanism to be threaded off, and forces the circuit breaker disjunction.This disjunction that produced by ambient temperature is misoperation, can't overcome.Simultaneously, conventional circuit breaker links into an integrated entity power circuit and load, its moving contact produces electric arc with fixed contact in the instantaneous meeting that separates, electric arc is between moving contact and fixed contact, heat in the electric arc spreads towards periphery, load is heavy more, loop current is big more, the electric arc that produces is strong more, and diffusion area is just big more towards periphery for heat in the electric arc, in the time of the outside diffusion area of electric arc, also heat directly is dissipated on the functional part of periphery, moving to being distributed in, the functional part of fixed contact periphery adds unnecessary heat, and this heat damage functional part also can make shorten the useful life of circuit breaker.
Summary of the invention:
The object of the present invention is to provide a kind of electronic breaker, described this electronic breaker will solve circuit breaker in the prior art because variation of ambient temperature produces the technical problem that produces electrical discharge arc between misoperation, the dynamic/static contact.
This electronic breaker of the present invention is made of signal picker, power supply, amplifying unit, exciting unit and power drive unit, wherein, described signal picker is connected in the main power circuit, signal picker is connected with the input of described amplifying unit, the output of amplifying unit is connected with described exciting unit, exciting unit is made of electronic switching element, and the output of exciting unit is connected with the input of described power drive unit.
Further, be connected with load in the output loop of described power drive unit.
Further, described power supply is by diode, variable resistance, resistor, capacitor, triode and voltage stabilizing didoe constitute, described diode, variable resistance, resistor, capacitor is linked in sequence in described main power circuit, the positive terminal of diode is connected with main power source, one end of capacitor is connected with the earth terminal of main power source, be provided with output between resistor and the capacitor, described output is connected with the collector electrode of triode, voltage stabilizing didoe is arranged between the base stage and main power source earth terminal of triode, and the emitter of triode is connected with the power end of amplifying unit.
Further, described signal picker is made of resistor, and an end of described resistor is connected with the earth terminal of main power circuit, and the other end of resistor is connected with the positive input terminal of described amplifying unit by another resistor.
Further, described amplifying unit is made of operational amplifier, input resistor, loading resistor and feedback resistor, the output of described signal picker is connected with the positive input terminal of described operational amplifier by described input resistor, the output of operational amplifier is connected with the earth terminal of main power source with feedback resistor by described loading resistor, and feedback resistor is arranged between the output and negative input end of operational amplifier.
Further, described exciting unit is made of photoelectrical coupler, resistor and charging capacitor, the output of described operational amplifier is connected with the positive input terminal of photoelectrical coupler by described resistor, described charging capacitor is arranged between the positive input terminal and negative input end of photoelectrical coupler, and the power end of exciting unit is connected with the electric power end.
Further, described power drive unit is made of power switch pipe and resistor, the output of described excitation electric unit is connected with the grid of described power switch pipe, be provided with first resistor between the source electrode of power switch pipe and the earth terminal, be provided with load between the drain electrode of power switch pipe and the earth terminal, be provided with second resistor between described grid and the earth terminal.
Further, described signal picker is made of capacitive element or inductive element.
Further, described power supply is DC power supply, the heterogeneous or single phase poaer supply of interchange.
Concrete, the voltage of the output in the power supply between resistor and the capacitor is+15 volts.
Further, the reverse voltage of voltage stabilizing didoe is 12 volts in the power supply.
Further, described main power source is DC power supply, the heterogeneous or single phase poaer supply of interchange.
Operation principle of the present invention is: when major loop has 48V voltage, electric current is arranged by being connected on the signal picker in the major loop, produce faint analog signal voltage signal, this voltage drop passes to the positive input terminal of operational amplifier by the input resistance of amplifying unit, operational amplifier is worth in proportion with this analog signal amplification, the aanalogvoltage that is produced after the amplification is delivered to the input of photoelectrical coupler by resistance, make the charging capacitor of exciting unit enter charging process, this process allows voltage begins slow rising from 0V between two input pins of photoelectrical coupler, and play time-lag action, when voltage between photoelectrical coupler two input pins rises to 0.5V when above, the output pin of photoelectrical coupler produces high level, this level is by the power switch pipe of the output pin exciting power amplifying unit of photoelectrical coupler, power switch pipe is from saturated by entering, make load current increase to 16A (ampere) from original zero, played power supply function thereby make load obtain electric current.Embodiment provided by the invention judges that electric current is to rely on sampler to realize, does not adopt traditional bimetallic element, does not produce misoperation so be not subjected to the temperature effect of environment; Simultaneously, power circuit and load linked into an integrated entity not to be to separate with fixed contact with closed by moving contact, but power switch pipe enters saturated realization by ending, and does not produce electric arc and does not also produce electric spark, the ambient substance of more can and not burning.
The present invention compares with prior art, and its effect is actively with tangible.The present invention adopts electronic devices and components to constitute in electronic breaker, the sampling of current signal and the output control of switch motion are realized by electronic device, can not be subjected to the influence of ambient temperature and misoperation can not produce electric arc yet, prolong the useful life of circuit breaker.
Description of drawings:
Fig. 1 is the circuit diagram of electronic breaker of the present invention.
Fig. 2 is the circuit diagram of the signal picker in the electronic breaker of the present invention.
Fig. 3 is the circuit diagram of the power supply in the electronic breaker of the present invention.
Fig. 4 is the circuit diagram of the amplifying unit in the electronic breaker of the present invention.
Fig. 5 is the circuit diagram of the exciting unit in the electronic breaker of the present invention.
Fig. 6 is the circuit diagram of the power drive unit in the electronic breaker of the present invention.
Embodiment:
Embodiment 1:
As Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and shown in Figure 6, electronic breaker of the present invention is by signal picker 1, power supply 2, amplifying unit 3, exciting unit 4 and power drive unit 5 constitute, described signal picker 1 is connected between main power circuit 10 and 20, described signal picker 1 is connected with the positive input terminal of described amplifying unit 3, the output of described amplifying unit 3 is connected with described exciting unit 4, described exciting unit 4 is made of sub-switch element 41, the output of described exciting unit 4 is connected with the input of described power drive unit 5, and load 6 is connected in the output loop of described power drive unit 5.
Further, described power supply 2 is by diode 21, variable resistance 22, resistor 23, electric capacity 24, triode 25 and voltage stabilizing didoe 26 constitute, described diode 21, variable resistance 22, resistor 23, capacitor 24 is connected in described main power circuit 10 and 20 in turn, the positive terminal of described diode 21 is connected with the main power source end and connects, one end of described capacitor 24 is connected with the earth terminal of main power source, be provided with output 27 between described resistor 23 and the capacitor 24, this output 27 is connected with the collector electrode of described triode 25, described voltage stabilizing didoe 26 is arranged between the base stage and main power source earth terminal of described triode 25, be provided with a resistor between the base stage of described triode and the collector electrode, the output 28 of the very described power supply 2 of the emission of described triode 25, this output 28 is connected with the power end of described amplifying unit 3.
Further, described signal picker 1 is made of resistor 100, and an end of described resistor 100 is connected with the earth terminal of main power circuit, and the other end of described resistor 100 is connected by the positive input terminal of resistor with described amplifying unit 3.
Further, described amplifying unit 3 is made of operational amplifier 31, input resistor 32, loading resistor and feedback resistor 34, the output of described signal picker 1 is connected with the positive input terminal of described operational amplifier 31 by described input resistor 32, the output of described operational amplifier 31 is connected with the earth terminal of main power source with feedback resistor 34 by described loading resistor 33, and described feedback resistor 34 is arranged between the output and negative input end of described operational amplifier 31.
Further, described exciting unit 4 is made of photoelectrical coupler 41, resistor 42 and charging capacitor 43, the output of described operational amplifier 31 is connected with the positive input terminal of described photoelectrical coupler 41 by described resistor 42, be provided with described charging capacitor 43 between the positive input terminal of described photoelectrical coupler 41 and the negative input end, be provided with resistor between the output 45 of described exciting unit 4 and the earth terminal, the power end 44 of 46 described exciting units 4 is connected with electric power end 30 and connects, and the earth terminal of electric power supply is 40.
Further, described power drive unit 5 is made of power switch pipe 51 and resistor, power switch pipe 51 can be a power MOS pipe 51, the output 45 of described excitation electric unit 4 is connected with the grid of described power MOS pipe 51, be provided with first resistor 52 between the source electrode of described power MOS pipe 51 and the earth terminal, be provided with described load 6 between the drain electrode of described power MOS pipe 51 and the earth terminal, also be provided with second resistor 53 between described grid and the earth terminal.
Further, described signal picker 1 is made of capacitive element or inductive element.
Further, the voltage of output 27 is+15 volts between the resistor 23 of described power supply 2 and the capacitor 24.
Further, the reverse voltage of the voltage stabilizing didoe 26 of described power supply 2 is 12 volts.
Further, described main power source is DC power supply, the heterogeneous or single phase poaer supply of interchange.
Claims (8)
1. electronic breaker, constitute by signal picker, power supply, amplifying unit, exciting unit and power drive unit, it is characterized in that: described signal picker is connected in the main power circuit, signal picker is connected with the input of described amplifying unit, the output of amplifying unit is connected with described exciting unit, exciting unit is made of electronic switching element, and the output of exciting unit is connected with the input of described power drive unit.
2. electronic breaker as claimed in claim 1 is characterized in that: be connected with load in the output loop of described power drive unit.
3. electronic breaker as claimed in claim 1, it is characterized in that: described power supply is by diode, variable resistance, resistor, capacitor, triode and voltage stabilizing didoe constitute, described diode, variable resistance, resistor, capacitor is linked in sequence in described main power circuit, the positive terminal of diode is connected with main power source, one end of capacitor is connected with the earth terminal of main power source, be provided with output between resistor and the capacitor, described output is connected with the collector electrode of triode, voltage stabilizing didoe is arranged between the base stage and main power source earth terminal of triode, and the emitter of triode is connected with the power end of amplifying unit.
4. electronic breaker as claimed in claim 1, it is characterized in that: described signal picker is made of resistor, one end of described resistor is connected with the earth terminal of main power circuit, and the other end of resistor is connected with the positive input terminal of described amplifying unit by another resistor.
5. electronic breaker as claimed in claim 1, it is characterized in that: described amplifying unit is made of operational amplifier, input resistor, loading resistor and feedback resistor, the output of described signal picker is connected with the positive input terminal of described operational amplifier by described input resistor, the output of operational amplifier is connected with the earth terminal of main power source with feedback resistor by described loading resistor, and feedback resistor is arranged between the output and negative input end of operational amplifier.
6. electronic breaker as claimed in claim 1, it is characterized in that: described exciting unit is made of photoelectrical coupler, resistor and charging capacitor, the output of described operational amplifier is connected with the positive input terminal of photoelectrical coupler by described resistor, described charging capacitor is arranged between the positive input terminal and negative input end of photoelectrical coupler, and the power end of exciting unit is connected with the electric power end.
7. electronic breaker as claimed in claim 1, it is characterized in that: described power drive unit is made of power switch pipe and resistor, the output of described excitation electric unit is connected with the grid of described power switch pipe, be provided with first resistor between the source electrode of power switch pipe and the earth terminal, be provided with load between the drain electrode of power switch pipe and the earth terminal, be provided with second resistor between described grid and the earth terminal.
8. electronic breaker as claimed in claim 1 is characterized in that: described signal picker is made of capacitive element or inductive element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100425985A CN101442199A (en) | 2008-09-05 | 2008-09-05 | Electronic breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100425985A CN101442199A (en) | 2008-09-05 | 2008-09-05 | Electronic breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101442199A true CN101442199A (en) | 2009-05-27 |
Family
ID=40726504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100425985A Pending CN101442199A (en) | 2008-09-05 | 2008-09-05 | Electronic breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101442199A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254415A (en) * | 2010-05-18 | 2011-11-23 | 上海东自电气有限公司 | Signal acquisition device for AC-DC (alternating current direct current) optoelectronic coupler |
| CN104577971A (en) * | 2014-12-26 | 2015-04-29 | 余姚市嘉荣电子电器有限公司 | Outage trip protection plug |
| CN113964786A (en) * | 2021-07-23 | 2022-01-21 | 南京华士电子科技有限公司 | Long-life output circuit capable of monitoring output current and forcibly turning off after overcurrent |
-
2008
- 2008-09-05 CN CNA2008100425985A patent/CN101442199A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102254415A (en) * | 2010-05-18 | 2011-11-23 | 上海东自电气有限公司 | Signal acquisition device for AC-DC (alternating current direct current) optoelectronic coupler |
| CN104577971A (en) * | 2014-12-26 | 2015-04-29 | 余姚市嘉荣电子电器有限公司 | Outage trip protection plug |
| CN104577971B (en) * | 2014-12-26 | 2017-11-14 | 余姚市嘉荣电子电器有限公司 | Power off trip protection plug |
| CN113964786A (en) * | 2021-07-23 | 2022-01-21 | 南京华士电子科技有限公司 | Long-life output circuit capable of monitoring output current and forcibly turning off after overcurrent |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090527 |