CN1206679C - Under voltage/subexcitation drop-away device circuit - Google Patents
Under voltage/subexcitation drop-away device circuit Download PDFInfo
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- CN1206679C CN1206679C CN 02138669 CN02138669A CN1206679C CN 1206679 C CN1206679 C CN 1206679C CN 02138669 CN02138669 CN 02138669 CN 02138669 A CN02138669 A CN 02138669A CN 1206679 C CN1206679 C CN 1206679C
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Abstract
The present invention relates to an undervoltage/shunt release circuit which is composed of a rectifying filter circuit, a wide voltage DC regulated circuit, a magnetic hysteresis comparison circuit, a pulse latch circuit, a pulse width modulation generating circuit, a triggering circuit, a sampling feedback circuit, an MOSFET tube drive circuit and a program control timing circuit, wherein the rectifying filter circuit is connected with the wide voltage DC regulated circuit and the sampling feedback circuit; the wide voltage DC regulated circuit is connected with the magnetic hysteresis comparison circuit, the pulse latch circuit, the pulse width modulation generating circuit, the triggering circuit, the MOSFET tube driving circuit and the program control timing circuit; the magnetic hysteresis comparison circuit is connected with the pulse latch circuit and the program control timing circuit; the pulse latch circuit is connected with the pulse width modulation generating circuit and the triggering circuit; the output end of the pulse width modulation generating circuit is connected with the MOSFET tube driving circuit; a feedback signal wire of the trigger circuit is connected with the pulse width modulation generating circuit; the sampling feedback circuit is in an optical coupling state to the triggering circuit; the program control timing circuit is connected with the pulse latch circuit. The present invention has the advantages of high reliability, high stability, low electromagnetic system temperature increase, large maintenance force, accurate time delay, convenient modification and high product universality.
Description
Technical field
What the present invention relates to is a kind of under voltage/shunt release circuit that integrates under-voltage release and shunt release, belongs to low tension switch attachment technique field.
Background technology
The comparator that prior art is made up of two triodes detects the voltage after the rectification, and clamp-pulse generator work.Pulse generator is to utilize the voltage and a certain voltage (threshold values) of the front and back of power supply zero crossing to compare.Power tube is (this moment, voltage was less than threshold values) conducting in the surrounding time of zero crossing, and remaining time then turn-offs.The main impulse electricity by electric capacity of time-delay realizes that regulator potentiometer is realized the change of time-delay.Its major defect is that whole circuit all is with high pressure, if when having peak voltage, and fragile components and parts; System's poor anti jamming capability, easily misoperation; The electromagnetic system temperature rise is higher; Because the triggered time is long, special fragile power tube, repair rate height; Confining force is not enough when under-voltage; Delay time error is big, and revises inconvenient; Can not be general between the different product, the stock is bigger; Volume is bigger, and is not attractive in appearance;
Summary of the invention
The objective of the invention is to defective at above-mentioned existence, propose a kind ofly can easily realize transient voltage by jumper switch SW1, SW2 or the dual-in-line toggle switch Dip-switch that is provided with on the wiring board, (fixing) time-delay is under-voltage, adjustable delay is under-voltage, help inhale under-voltage, self-priming is under-voltage and under voltage/the shunt release of function such as shunt opening driving.Technical solution of the present invention: be made up of current rectifying and wave filtering circuit, wide voltage direct current regulation circuit, magnetic hysteresis comparison circuit, pulse latch cicuit, pulse-width modulation generation circuit, circuits for triggering, sampling feedback circuit, MOSFET tube drive circuit, high-precision program control timing circuit, wherein the voltage behind current rectifying and wave filtering circuit is given wide voltage direct current regulation circuit and sampling feedback circuit and load use; The voltage one road that wide voltage direct current regulation circuit produces is supplied with magnetic hysteresis comparison circuit, pulse latch cicuit, pulse-width modulation generation circuit, circuits for triggering, the use of MOSFET tube drive circuit, another road is passed on connector XP1, the XP5 in the high-precision program control timing circuit by connector XS1, XS5, use for the high-precision program control timing circuit, the zero passage sampled signal is given comparison circuit IC4 by the connector XP2 in connector XS2 and the high-precision program control timing circuit; The under-voltage signal of magnetic hysteresis comparison circuit is given the pulse latch cicuit on the one hand, triggers or stop the work of high-precision program control timing circuit on the other hand by connector XS3, XP3; The pulse latch cicuit provides a reference voltage to pulse-width modulation generation circuit on the one hand, provides an inceptive impulse to circuits for triggering on the other hand; Pulse-width modulation generation circuit provides triggering signal for the MOSFET tube drive circuit; The comparator IC1C that circuits for triggering are given feedback signal in the pulse-width modulation generation circuit compares the generation triggering signal; The sampling feedback circuit is given circuits for triggering with detection signal by the light emitting diode light lotus root; Field effect transistor Q1 conducting in the MOSFET tube drive circuit then load LOAD is connected, otherwise, then turn-off; The timing signal that the high-precision program control timing circuit produces turn-offs the transistor T2 in the pulse latch cicuit by connector XP4, XS4.
Wide voltage direct current regulation circuit is made up of voltage stabilizing didoe DZ1, the DZ2 that transistor T2 is connected in series with it.
Comparator IC1B in the pulse latch cicuit+end and its output between and meet diode D6, comparator IC1B-be connected in series transistor T2, switch SW 1 respectively between holding over the ground.Circuits for triggering are made up of two and the transistor T3, the T4 that connect and diode D7, switch SW 2, variable resistor R28, light lotus root, capacitor C 6.
The sampling feedback circuit by light-emitting diode anti-and meet diode D12, electricity group R29,30,31 forms.The high-precision program control timing circuit is made up of transistor T7, comparison circuit IC4, counter circuit IC3.
Major advantage of the present invention is that reliability and stability greatly improve; The electromagnetic system temperature rise is low, and confining force is big; Time-delay is accurate, and precision can reach 0.01 second, and revises conveniently; The product highly versatile, the stock significantly reduces; Outward appearance is small and exquisite.And have and can easily realize transient voltage by jumper switch SW1, SW2 or the dual-in-line toggle switch Dip-switch that is provided with on the wiring board, (fixing) time-delay is under-voltage, adjustable delay is under-voltage, help inhale under-voltage, self-priming is under-voltage and function such as shunt opening driving.
Description of drawings
Accompanying drawing is the embodiments of the invention structural representations.
Among the figure 1 is current rectifying and wave filtering circuit, the 2nd, be a wide voltage direct current regulation circuit, the 3rd, be a magnetic hysteresis comparison circuit, the 4th, be the pulse latch cicuit, the 5th, pulse-width modulation generation circuit, 6 is circuits for triggering, the 7th, the sampling feedback circuit, the 8th, MOSFET tube drive circuit, the 9th, high-precision program control timing circuit.Diode D1～D4 model is 1N4007, and triode T3, T4 model are 9013, and triode T2, T5, T6 model are 5401, and diode D5～D8, D13～D22 model is 1N4148, and diode D9～D11 model is FR107.The IC4 model is LM358, and the IC3 model is CD4040.The IC2 model is the P521 photoelectric coupling circuit.IC1 (IC1A, IC1B, IC1C) model is LM324.Resistance R 2 resistance 200K/1W, resistance R 3 resistance 36K/0.5W, resistance R 4 resistance 200K/1W, resistance R 5 resistance 200K/0.25W, resistance R 6, R7, R12, R15, R16, R17, R18, R27 resistance 104, resistance R 8, R9 resistance 1213, resistance R 10 resistances 912, resistance R 11 resistances 392, resistance R 13, R14 resistance 514, resistance R 19, R23, R24 resistance 203, resistance R 20, R25, R22 resistance 103, resistance R 26 resistances 513, resistance R 28 resistances 503 (above-mentioned resistance unit is for beatting up nurse (Ω))
Embodiment
The contrast accompanying drawing, current rectifying and wave filtering circuit 1, AC power is introduced by input P1, P2, and through Electromagnetic interference filter (EMI Filter) filtering that capacitor C 1, C2, transformer T1 ', voltage-stabiliser tube DZ0 form, diode D1～D4 rectification goes out pulsating direct current and uses for subsequent conditioning circuit.Electromagnetic interference filter not only can suppress the electromagnetic interference (EMI) that electrical network is introduced, and can prevent that the noise that under voltage/shunt release produces from outwards transmitting through power line.Wherein, DZ0 is a two-way transient state recovery diode (TVS).Wide voltage direct current regulation circuit 2 produces about 12V DC-voltage supply road and uses.This circuit is when exchanging 50V, just can export the 11.5V direct current reliably, exchanging under the 300V, output voltage only is 13V, the circuit of the low pressure reduction of this wide region has greatly satisfied the demand of under voltage/shunt release logical circuit to power supply, wherein DZ1, DZ2 are the 6V voltage-stabiliser tube, and T1 is transistor (model BUX87P); Hysteresis comparator 3 is when power connection, if this moment, voltage was lower than 150V, comparison circuit IC1A-is the pin output low level 1.; If when being higher than 150V, comparison circuit IC1A-is pin output high level 1.; When the voltage normal value drops to 110V, comparison circuit IC1A-1. pin becomes low level by high level, and the connection by connector XS3 → XP3, trigger timer and carry out work, have only when this voltage by the under-voltage 150V of rising to or when above, comparison circuit IC1A-1. pin just becomes high level, simultaneously timer is resetted, and realizes whole hysteresis loop.Just often transistor T2 or switch SW 1 are connected, as the comparison circuit IC1B-in the latch cicuit 4 when 1. pin produces from low to high pulse, IC1B-in the latch cicuit 4 7. pin is upgraded to high level by low level immediately, in the delay time of setting, no matter the comparison circuit IC1B-in the latch cicuit 1. the level of pin how to change, the comparison circuit IC1B-in the latch cicuit 4 7. pin remains high level; Have only in the latch cicuit 4 comparison circuit IC1B-1. pin be low level and set delay time and arrive that the level saltus step just takes place the comparison circuit IC1B-in the latch cicuit 4 7. pin.Therefore, it can effectively suppress line voltage moment and interference signal such as fall, and has avoided unnecessary misoperation, has improved reliability of system operation greatly.When shorting switch SW1, this device is transient voltage/shunt release; Pwm generator 5 can produce the output signal of two kinds of frequencies, and a kind of is pulse-width signal when zero crossing, and frequency is 100Hz, and when input voltage descended, this pulse was with broadening; Also have a kind of about 10KHz high frequency feedback signal, this frequency is by the system parameters decision, because the inertia of electromagnetic system is very little, so the frequency of feedback signal is very high.As the comparison circuit IC1C-in the pulse-width modulation generation circuit 5 when 8. pin is low level, field effect transistor Q1 (model IRFBG30) conducting, on the contrary then end; Trigger 6 need have the process of a high voltage adhesive about 0.1S during under-voltage or shunt opening at self-priming, need load voltage to remain on the subnormal voltage operation state for a long time after the adhesive again, in order to avoid burn electromagnetic system, this trigger designs for satisfying this requirement.Capacitor C 3, resistance R 24, R25, transistor T3, pulsewidth of diode D7 generation are the pulse about 0.1S.Resistance R 25, R26, R28, transistor T4 have formed an active pull down circuit, regulate resistance R 28 and can make output voltage remain on needed magnitude of voltage.Therefore resistance R 25 is much smaller than resistance R 28, thus moment pick-up voltage to be higher than normal output valve far away.Resistance R 26, R28, transistor T4 remove and are the shunt release circuit, when capacitor C 6, resistance R 24, R25, R26, transistor T3, T4 remove and during short circuit jumper switch SW2, be and help the suction under-voltage release; Sampling feedback circuit 7 is because the inertia of electromagnetic system is very little, so preceding under-voltage release all adopts open loop control, but its open-loop gain can not be transferred De Taigao again, the too high electromagnetic system that burns easily, low excessively when under-voltage electromagnetic system keep again incessantly.This circuit has adopted the sampling feedback circuit originally, makes it to constitute a closed-loop system.By constantly feeding back and compensating high-frequency energy, the stability of a system and reliability are improved greatly.Same load is compared test show, under the identical situation of confining force, the output voltage that adopts this circuit only is 30% of open loop like product, and thorough the indelible noise problem of original product that solved.Wherein, IC2 (model P521) is a photoelectric coupling circuit; MOSFET tube drive circuit 8 because the interelectrode capacitance of power MOSFET is bigger, in order to reduce the power consumption of pipe, just necessarily requires trigger impulse that enough fast rising and decrease speed are arranged, and is precipitous along requiring before and after the pulse just.As the comparison circuit IC1C-in the pulse-width modulation generation circuit 5 when 8. pin is low level, the T5 conducting, the 12V power supply charges to interelectrode capacitance by D8; When the comparison circuit IC1C-in the pulse-width modulation generation circuit 5 when 8. pin is high level transistor T5 end, transistor T6 conducting, grid capacitance is discharged rapidly by transistor T6 and resistance R 23.DZ3 punctures MOSFET for the 15V voltage-stabiliser tube prevents peak voltage.Wherein, field effect transistor Q1 adopts the IRFBG30 of U.S. international semiconductor company; High-precision program control timing circuit 9 can be provided with time of 1024 kinds of different lengths by programming.Comparison circuit IC4 (model LM358) produces the zero-crossing pulse of 100Hz.When taking place when under-voltage, 1. comparison circuit IC1A-is that connector XS3 → XP3 joins is that low level starts timing.Diode D13～D22 and R17 have constituted ten inputs and door.Ten way switch of timer programming IC3 (model is CD4040) by dual-in-line DIP-Switch make up to be realized, the combination that each is possible provide the different time.When timing then, the connector XP4 in the high-precision program control timing circuit 9 goes up by low and uprises, thereby turn-offs transistor T7 and T2, and then turn-offs field effect transistor Q1.
Claims (6)
1, under voltage/shunt release circuit, it is characterized in that being made up of current rectifying and wave filtering circuit (1), wide voltage direct current regulation circuit (2), magnetic hysteresis comparison circuit (3), pulse latch cicuit (4), pulse-width modulation generation circuit (5), circuits for triggering (6), sampling feedback circuit (7), MOSFET tube drive circuit (8), high-precision program control timing circuit (9), wherein the voltage behind current rectifying and wave filtering circuit (1) is given wide voltage direct current regulation circuit (2) and sampling feedback circuit (7) and load use; The voltage one road that wide voltage direct current regulation circuit (2) produces is supplied with magnetic hysteresis comparison circuit (3), pulse latch cicuit (4), pulse-width modulation generation circuit (5), circuits for triggering (6), MOSFET tube drive circuit (8) use, another road is passed on connector (XP1) in the high-precision program control timing circuit (9), (XP5) by connector (XS1), (XS5), use for high-precision program control timing circuit (9), the zero passage sampled signal is given comparator (IC4) by connector (XS2) and the connector (XP2) in the high-precision program control timing circuit (9); The under-voltage signal of magnetic hysteresis comparison circuit (3) is given pulse latch cicuit (4) on the one hand, triggers or stop the work of high-precision program control timing circuit (9) by connector (XS3), (XP3) on the other hand; Pulse latch cicuit (4) provides a reference voltage to pulse-width modulation generation circuit (5) on the one hand, an inceptive impulse is provided on the other hand circuits for triggering (6); Pulse-width modulation generation circuit (5) provides triggering signal for MOSFET tube drive circuit (8); The comparator (IC1C) that circuits for triggering (6) are given feedback signal in the pulse-width modulation generation circuit (5) compares the generation triggering signal; Sampling feedback circuit (7) is given circuits for triggering (6) with detection signal by the light emitting diode light lotus root; Then load of field effect transistor (Q1) conducting (LOAD) in the MOSFET tube drive circuit (8) is connected, otherwise, then turn-off; The timing signal that high-precision program control timing circuit (9) produces turn-offs the transistor (T2) in the pulse latch cicuit (4) by connector (XP4), (XS4).
2, under voltage according to claim 1/shunt release circuit is characterized in that wide voltage direct current regulation circuit (2) is made up of voltage stabilizing didoe (DZ1), (DZ2) that transistor (T2) is connected in series with it.
3, under voltage according to claim 1/shunt release circuit, it is characterized in that in the pulse latch cicuit (4) comparator (IC1B)+end and its output between and connect diode (D6), comparator (IC1B)-be connected in series transistor (T2), switch (SW1) respectively between holding over the ground.
4, under voltage according to claim 1/shunt release circuit is characterized in that circuits for triggering (6) are made up of two and transistor (T3), (T4) and the diode (D7), switch (SW2), variable resistor (R28), light lotus root, the electric capacity (C6) that connect.
5, under voltage according to claim 1/shunt release circuit is characterized in that sampling feedback circuit (7) is anti-and connect diode (D12), electricity group (R29), (30), (31) and form by light-emitting diode.
6, under voltage according to claim 1/shunt release circuit is characterized in that high-precision program control timing circuit (9) is made up of transistor (T7), comparison circuit (IC4), counter circuit (IC3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138669 CN1206679C (en) | 2002-11-26 | 2002-11-26 | Under voltage/subexcitation drop-away device circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02138669 CN1206679C (en) | 2002-11-26 | 2002-11-26 | Under voltage/subexcitation drop-away device circuit |
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| Publication Number | Publication Date |
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| CN1411012A CN1411012A (en) | 2003-04-16 |
| CN1206679C true CN1206679C (en) | 2005-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 02138669 Expired - Fee Related CN1206679C (en) | 2002-11-26 | 2002-11-26 | Under voltage/subexcitation drop-away device circuit |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101752829B (en) * | 2009-12-21 | 2014-06-25 | 海洋王照明科技股份有限公司 | Undervoltage protection circuit and switching power supply |
| DE102012215310B4 (en) * | 2012-08-29 | 2020-09-03 | Siemens Aktiengesellschaft | Circuit arrangement for an electrical protective device |
| EP3543533B1 (en) | 2016-11-17 | 2021-03-31 | Hangzhou Sanhua Research Institute Co., Ltd. | Control system and control method |
| CN108073101A (en) * | 2016-11-17 | 2018-05-25 | 杭州三花研究院有限公司 | Communication control system |
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