CN207398816U - A type low-voltage leakage protector circuits - Google Patents
A type low-voltage leakage protector circuits Download PDFInfo
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- CN207398816U CN207398816U CN201721490073.9U CN201721490073U CN207398816U CN 207398816 U CN207398816 U CN 207398816U CN 201721490073 U CN201721490073 U CN 201721490073U CN 207398816 U CN207398816 U CN 207398816U
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Abstract
The utility model is related to a kind of A types low-voltage leakage protector circuit, including signal sampling module, comparator, time delay module, simulation bistable circuit, leakage protection module.Using the A type low-voltage leakage protection circuits of this kind of circuit structure; the earth leakage protective output state of circuit detection triggering is maintained by simulating bistable circuit; so that it is guaranteed that the silicon-controlled stabilization in periphery can be driven and reliably powered off, effectively leakage protection is played.Simultaneously; the simulation bistable circuit is simple for structure; it is in stable condition; reduce the complexity of circuit entirety; moreover, which has also incorporated in design while power on/off reset function, also increases the enabled control signal with the certain time-delay time all the way and carrys out filtering circuit interference that may be present in power up; it prevents circuit false triggering, further improves circuit overall work state and stability, reliability and security on earth leakage protective trip operation.
Description
Technical field
The utility model is related to power supply technique field more particularly to electric leakage protection technology field, in particular to a kind of A types are low
Press circuit for electric leakage protector.
Background technology
Existing common A types circuit for electric leakage protector employs arteries and veins on earth leakage protective tripping control signal realization is triggered
It rushes widening circuit and the electric leakage signal pulse broadening detected is controlled into drive module for the control signal of fixed pulse width, driving is outer
Silicon-controlled disconnection system power supply is enclosed, realizes earth leakage protective.The design there are the problem of be that the pulsewidth of stretch circuit broadening is consolidated
Fixed, the width duration time is to drive the silicon-controlled power-off in periphery, since the power-off needs for controlling silicon-controlled stabilization continue enough
Long time, therefore in the adaptation silicon-controlled individual in periphery and model difference etc. too short cannot be controlled there are the fixed pulse width time
Make the silicon-controlled risk reliably powered off.Simultaneously as pulse stretcher circuit structure is relative complex, complicated structural theory enterprising one
Step reduces the reliability and stability of circuit entirety, is particularly applied to such field of earth leakage protective, for security and can
It is required by property high.
The Chinese patent of Patent No. 200910247438.9 discloses a kind of earth leakage protective device (please referring to Fig.1), including：
Amplifier (101), rectifier (102), signal detector (103), comparator (104), impulse generator (105), electric current driving
Device (106).The electric leakage signal pulse broadening detected is come for the control signal of fixed pulse width which employs stretch circuit
Drive module is controlled, drives silicon-controlled disconnection system power supply, but the driving peripheral silicon-controlled control signal duration deposits
Random or too short the problem of, due to the power-off for controlling silicon-controlled stabilization need it is long enough, it is outer in adaptation
Whens enclosing silicon-controlled individual and model difference etc., too short the silicon-controlled wind reliably powered off cannot be controlled there are the fixed pulse width time
Danger.Simultaneously as the electric leakage signal duration is random, and pulse stretcher circuit structure is relative complex, complicated structure it is actual into
One step reduces the reliability and stability of circuit entirety, is particularly applied to such field of earth leakage protective, for security and
Reliability requirement is high.
Utility model content
The purpose of the utility model is to overcome the shortcomings that the above-mentioned prior art, earth leakage protective can be realized by providing one kind
A type low-voltage leakage protector circuits.
To achieve these goals, the A type low-voltage leakage protectors circuit of the utility model has following form：
The A type low-voltage leakage protector circuits, are mainly characterized in that, the electricity of the A type low-voltage leakage protector circuits
Line structure includes：
Signal sampling module for receiving electric leakage signal, and exports detection signal；
Comparator, for exporting earth leakage protective comparison signal, the input terminal of the comparator and the signal sampling module
Output terminal be connected；
Time delay module, should for filtering interference signals, and by the earth leakage protective comparison signal into exporting after line delay
The input terminal of time delay module is connected with the output terminal of the comparator；
Simulate bistable circuit, for keep through time delay module export earth leakage protective comparison signal, and receive one when
The reset signal that clock enable signal and electrification reset module generate, the input terminal of the simulation bistable circuit and the delay
The output terminal of module is connected；
Leakage protection module is used to implement earth leakage protective, the input terminal of the leakage protection module and the simulation bistable
The output terminal of state circuit is connected.
The signal sampling module of the A type low-voltage leakage protector circuits includes：
Amplifier for receiving electric leakage signal, and exports amplified signal；
Rectifier, for receiving the amplified signal and the amplified signal being carried out rectification to export rectified signal；
Signal detector for receiving and detecting the rectified signal, and exports detection signal.
Detection signal described in the positive grade input terminal input of the comparator of the A type low-voltage leakage protector circuits, it is described
The negative input input bandgap voltage reference of comparator.
The output of the time delay module of the A type low-voltage leakage protector circuits terminates a capacitance.
It is laggard that the rectified signal is converted to DC level signal by the signal detector of the A type low-voltage leakage protector circuits
Row detection.
The rectified signal of the A type low-voltage leakage protector circuits is ac leakage signal.
The leakage protection module of the A type low-voltage leakage protector circuits is specially tripping controller, tripping control
Device is used to control the switch of external relay by simulating the earth leakage protective state that bistable circuit is kept.
The tripping controller of the A type low-voltage leakage protector circuits includes driver, for driving earth leakage circuit-breaker.It should
A type low-voltage leakage protector circuits leakage protection module control external relay cut off the power power supply when, the simulation
Bistable circuit departs from the earth leakage protective state kept.
The A type low-voltage leakage protector circuits in the utility model are employed, are examined circuit by simulating bistable circuit
It surveys the earth leakage protective output state of triggering to maintain, so that it is guaranteed that the silicon-controlled stabilization in periphery can be driven and reliably powered off, rise
To effectively leakage protection.Meanwhile simulation bistable circuit is simple for structure, and it is in stable condition, reduce answering for circuit entirety
Miscellaneous degree, moreover, the simulation bistable circuit have also incorporated electrification reset, power-off reset function in design, can will do
Signal is disturbed to be filtered out.The enabled control with the certain time-delay time all the way is also added in the simulation bistable circuit structure to believe
Number carry out filtering circuit interference that may be present in power up, prevent circuit false triggering, further improve circuit entirety work
Make state and stability, reliability and security on earth leakage protective trip operation.
Description of the drawings
Fig. 1 is the electrical block diagram of circuit for electric leakage protector in the prior art.
Fig. 2 is the electrical block diagram of the A type low-voltage leakage protector circuits of the utility model.
Fig. 3 is the particular circuit configurations schematic diagram of the A type low-voltage leakage protector circuits of the utility model.
Specific embodiment
In order to more clearly describe the technology contents of the utility model, come with reference to specific embodiment into traveling one
The description of step.
It refers to shown in Fig. 2, is the electrical block diagram of the A type low-voltage leakage protector circuits of the utility model,
It includes amplifier 201, rectifier 202, signal detector 203, comparator 204, time delay module 205, simulation bistable circuit
206th, tripping controller 207, wherein, the voltage value of electric leakage signal of the amplifier to detecting generates amplification letter after being amplified
Number, rectifier carries out rectification to the amplified signal of input, and adjusts amplified signal waveform and voltage amplitude scope, whole for generating
Flow signal.Signal detector is detected the crest voltage or RMS voltage of the rectified signal of input, can be by AC signal
DC level signal is converted into, generates detection signal.Comparator by the detection signal of input compared with bandgap voltage reference,
Judge whether to trigger earth leakage protective, export control signal.If judging, detection signal is more than bandgap voltage reference, and letter is compared in output
Number (comparison signal be with electric leakage signal change pulse signal).Above-mentioned comparison signal is inputted to time delay module, control delay
Module generates certain delay time.Above-mentioned comparison signal exports after time delay module is delayed.If electric leakage signal non-interference signal,
It remains to export effective comparison signal after being then delayed.Bistable circuit is simulated, the effective ratio that will be exported after time delay module delay filtering
It is maintained compared with signal condition, ensures that the comparison signal state exported after keeping is no longer influenced by input electric leakage signal, meanwhile,
It has been incorporated in design and has powered on/off reset function, it is contemplated that circuit signal interference problem that may be present in power up,
Cause the mistake latch of signal condition, so as to influence circuit allomeric function.Circuit overall work is further improved in design
State and stability, reliability and security on earth leakage protective trip operation.The signal condition of above-mentioned holding is exported to jump
Brake controller controls protection switch.When detecting leaky, leakage protection is played in power supply of cutting off the power.
In practical applications, which can be integrated on same chip, to improve the integrated of system
Degree.
It refers to shown in Fig. 3, is the particular circuit configurations signal of the A type low-voltage leakage protector circuits of the utility model
Figure mainly includes amplifier 201, rectifier 202, signal detector 203, comparator 204, time delay module 205, simulation bistable
State circuit 206, tripping controller 207 etc..Its input signal be electric leakage signal that the winding that is wrapped on iron core generates (in figure not
Show), amplified signal is generated after amplification.The amplifier uses switched capacitor amplifier structure, and circuit internal clocking is needed to send out
Raw device 213 generates clock signal, and cooperation switching capacity amplifier uses.The rectifier is using complementary switch capacitance sampling electricity
Road, sampling clock control switched capacitor amplifier structure with clock 214 to generate in time from circuit internal clock generator.It is described
Rectifier carries out rectification to the amplitude range and waveform of the amplified signal of input, generates rectified signal.It is and described after over commutation
Amplified signal is stablized relatively compared to the amplitude of rectified signal, therefore for the different electric leakage signal of amplitude range, pair need not set
Fixed earth leakage protective triggering bandgap voltage reference is adjusted.The signal detector be RMS to DC, above-mentioned rectified signal
Input is to signal detector, and signal detector is by electric leakage signal (detection electric leakage signal is AC signal) equivalency transform after rectification
For with input electric leakage signal Strength Changes DC level signal, for signal detection.The comparator negative terminal input band gap electricity
The bandgap voltage reference that benchmark 210 is pressed to export, anode input the detection signal.If the detection signal voltage value of input is enough
Greatly, more than the bandgap reference voltage, then so that the output voltage of operational amplifier is overturn, output earth leakage protective is effective
Comparison signal.The time delay module, can external capacitor 2051, it is that the effective comparison for exporting above-mentioned earth leakage protective is believed to realize function
It is exported again after number delay a period of time, plays filtering interference signals, prevent unnecessary earth leakage protective false triggering, it is dynamic to improve tripping
The reliability and stability of work.The simulation bistable circuit will export comparison signal effectively, i.e. earth leakage protective after delay
State maintains.The state control tripping controller of the holding takes trip operation, the silicon-controlled disconnection system power supply in driving periphery.
Meanwhile overall structure has incorporated electrification reset, i.e. power-off reset function in design, it is contemplated that circuit can in power up
Signal interference problem existing for energy causes the mistake latch of signal condition, the problem of so as to influence circuit allomeric function.It is designing
On further improve circuit overall work state and stability, reliability and security on earth leakage protective trip operation.
The tripping controller, control external relay are cut off the power power supply, play creepage protection function.Complete earth leakage protective action
Meanwhile simulate bistable circuit and reset, depart from hold mode.
In a specific embodiment, the A type low-voltage leakage protector circuits of the utility model further include：
Voltage clamping 208, by externally fed voltage clamping near the representative value of leakage protection circuit operating voltage；
Biasing 209, the bias current needed for generation circuit internal work；
Bandgap reference voltage for conventional bandgap reference voltage structure, generates one with voltage change very little, zero-temperature coefficient
Bandgap voltage reference for using inside circuit；
Reference voltage 211, based on bandgap reference voltage, using the routine of electric resistance partial pressure combination amplifier negative feedback type
Known technology structure, a series of obtained required reference voltages inside circuit for using；
Electrification reset circuit 212, to will including clock generator, control clock, simulation bistable circuit including electricity
Circuit component is initialized；
Clock generator can mainly be realized for generating internal clocking by RC oscillators；
Clock module is controlled, for coordinating clock generator, the clock signal of frequency and phase needed for generation circuit work
It is used for circuit inside, and the control clock module is mainly used for coordinating amplifier, rectifier and signal detector one
Play work.
In the technical solution of the A type low-voltage leakage protector circuits of the utility model, wherein included each function mould
Block and modular unit can correspond to the particular hardware circuit in integrated circuit structure, therefore only relate to particular hardware circuit
It improves, hardware components not only only belong to perform the carrier of control software or computer program, therefore solve corresponding technology
Problem simultaneously obtains the application that corresponding technique effect is also not directed to any control software or computer program, that is to say, that
The utility model can solve to want just with the improvement in terms of the hardware circuit involved by these modules and unit
The technical issues of solution, and corresponding technique effect is obtained, and and need not aid in specific control software or computer
Program can realize corresponding function.
The A type low-voltage leakage protector circuits in the utility model are employed, are examined circuit by simulating bistable circuit
It surveys the earth leakage protective output state of triggering to maintain, so that it is guaranteed that the silicon-controlled stabilization in periphery can be driven and reliably powered off, rise
To effectively leakage protection.Meanwhile simulation bistable circuit is simple for structure, and it is in stable condition, reduce answering for circuit entirety
Miscellaneous degree, moreover, the simulation bistable circuit have also incorporated electrification reset, power-off reset function in design, can will do
Signal is disturbed to be filtered out.The enabled control with the certain time-delay time all the way is also added in the simulation bistable circuit structure to believe
Number carry out filtering circuit interference that may be present in power up, prevent circuit false triggering, further improve circuit entirety work
Make state and stability, reliability and security on earth leakage protective trip operation.
In this description, the utility model is described with reference to its specific embodiment.It but it is clear that still can be with
The spirit and scope that various modification can be adapted and converts without departing from the utility model.Therefore, specification and drawings should be considered as
It is illustrative and not restrictive.
Claims (6)
- A kind of 1. A types low-voltage leakage protector circuit, which is characterized in that the circuit of the A type low-voltage leakage protector circuits Structure includes：Signal sampling module；Comparator is connected with the signal sampling module；Time delay module is connected with the comparator；Bistable circuit is simulated, is connected with the time delay module；Leakage protection module is connected with the simulation bistable circuit.
- 2. A types low-voltage leakage protector circuit according to claim 1, which is characterized in that the signal sampling module Including：Amplifier；Rectifier is connected with the amplifier；Signal detector is connected with the rectifier.
- 3. A types low-voltage leakage protector circuit according to claim 1, which is characterized in that the positive grade of the comparator Input terminal is connected with the output terminal of a detection signal, and the negative input of the comparator is connected with bandgap voltage reference It connects.
- 4. A types low-voltage leakage protector circuit according to claim 1, which is characterized in that the time delay module it is defeated Outlet is connected with a capacitance.
- 5. A types low-voltage leakage protector circuit according to claim 1, which is characterized in that the leakage protection module For tripping controller, the tripping controller is connected with the simulation bistable circuit.
- 6. A types low-voltage leakage protector circuit according to claim 5, which is characterized in that the tripping controller bag Include driver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721490073.9U CN207398816U (en) | 2017-11-09 | 2017-11-09 | A type low-voltage leakage protector circuits |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721490073.9U CN207398816U (en) | 2017-11-09 | 2017-11-09 | A type low-voltage leakage protector circuits |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207398816U true CN207398816U (en) | 2018-05-22 |
Family
ID=62325981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721490073.9U Active CN207398816U (en) | 2017-11-09 | 2017-11-09 | A type low-voltage leakage protector circuits |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207398816U (en) |
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2017
- 2017-11-09 CN CN201721490073.9U patent/CN207398816U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 214135 -6, Linghu Avenue, Wuxi Taihu international science and Technology Park, Wuxi, Jiangsu, China, 180 Patentee after: China Resources micro integrated circuit (Wuxi) Co., Ltd Address before: 214135 Jiangsu city of Wuxi province Taihu international science and Technology Park Linghu Road No. 180 -22 Patentee before: WUXI CHINA RESOURCES SEMICO Co.,Ltd. |
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| CP03 | Change of name, title or address |