CN102097779B - Anti-interference electricity intelligent control device - Google Patents
Anti-interference electricity intelligent control device Download PDFInfo
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- CN102097779B CN102097779B CN201110039608.1A CN201110039608A CN102097779B CN 102097779 B CN102097779 B CN 102097779B CN 201110039608 A CN201110039608 A CN 201110039608A CN 102097779 B CN102097779 B CN 102097779B
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Abstract
The invention relates to a novel anti-interference electricity intelligent control device. The novel anti-interference electricity intelligent control device aims to enable an anti-interference electricity protection function of an anti-interference electricity control module when the anti-interference electricity intelligent control module works normally, and switch a switching circuit on, automatically switch an AC power supply circuit on, switch a power supply circuit of the anti-interference electricity intelligent control module off, work as an ordinary AC contactor system, simultaneously transmit an alarming signal and replace the control module at a proper time when the anti-interference electricity control module fails per se. The novel anti-interference electricity intelligent control device has the characteristics of working reliability, high capacity of resisting disturbance, complete protection functions, small volume, wide application range, DC low voltage keeping, energy-saving noiseless running and the like.
Description
Technical field
The present invention relates to apparatus field of intelligent control, particularly a kind of anti-flashover intelligent control device.
Background technology
Along with social development and technological progress, new technological industry constantly occurs, power consumer is all paid close attention to the problem of the quality of power supply more than ever.For large-scale iron and steel enterprise, petroleum chemical enterprise, chemical enterprises etc., affect huge because power grid quality problem causes the economic loss that electrical fault causes.Electric power system can run into various faults when operation, due to reasons such as thunderbolt, short trouble reclosing, enterprise outside or internal electric network fault, main equipment startings, cause voltage instantaneous to fluctuate by a relatively large margin or short supply interruption recovers again, this phenomenon is called rolling electric fault.
Nowadays the method for anti-shake electricity mainly can be summed up as following four kinds on the market: (1) application power-off delay relay, motor are restarted device.Under the protection of this rolling electric fault, contactor coil voltage is subject to shaking the impact of electric fault, and operating characteristic will change, contact disconnection.The method control loop principle is complicated, and motor to restart the cost of device very high.(2) adopt energy storage delay cell, for contactor coil continues to provide energy during rolling electric fault, guarantee the adhesive of main contact, contactor operating state does not change.This voltage shock avoiding mode type selecting is dumb, range of choice is little, increased the complexity of control circuit.(3) time delay snap close head unit, after contactor adhesive, coil proceeds to battery saving mode, and by snap close head snap action, keeps the on-state of main contact.When the electric fault that shakes occurs, contactor operating characteristic changes, but due to the effect of snap close head, probe of contactor does not disconnect, and operating state does not change.This snap close head can only be used in conjunction with custom-designed special contactor, and the main contact being locked by snap close head disconnects and need independently power supply in the situation that of power-off, when being greater than the contactor of 170A, and supporting locker with it not.(4) adopt dual power supply mode.While shaking electric fault, contactor coil voltage is constant, and contactor operating characteristic does not change.This method cost is high, complex circuit.
Along with the intelligent control technology of power electronic technology, computer technology, intelligent control technology, low-voltage electrical apparatus etc. develops rapidly, research has the electric equipment products of anti-shake Electricity Functional and is paid close attention to widely.As anti-flashover intelligent AC contactor, anti-shake electric time delay module, anti-shake electric intelligent controller for electrical motor etc.It utilizes electronic technology and single-chip microcomputer control technology, by testing circuit, judges whether to occur to shake electric fault, and when shaking electric fault generation, starting energy storage delay circuit, enters anti-shake electric protection program, makes control system carry out anti-shake electric fault protection by the program of setting in advance.But, in the time of these anti-shake electric product application, also to system, increased a unreliable factor, once control module itself breaks down, will cause the faults such as shutdown of control system.Due to anti-flashover intelligent, control protection product and be mostly applied in the important industrial and mining enterprises such as oil, chemical industry, what first will guarantee is the safe operation of system and stable.Be badly in need of a kind of Novel anti-interference electricity intelligent control device of development, when occurring to shake electric fault, module has the anti-shake Electricity Functional of time delay, and when system is not shaken electric fault, contactor normally moves; Once itself breaks down control module, module, by automatic switch-over circuit, by control module excision, and is sent alarm signal so, and meanwhile, starting ac power supply circuit, normally moves system, in the suitable moment, shuts down and changes control module.This Ideas and ways can be applied in similar Based Intelligent Control product.
Summary of the invention
The object of the invention is when anti-flashover intelligent control module is normal; start the anti-shake electric protection function of anti-shake electric control module; when anti-shake electric control module itself breaks down; starting commutation circuit; automatically start ac power supply circuit, the power supply circuits that cut off anti-flashover intelligent control module, by common A.C. contactor system works; send alarm signal simultaneously, at reasonable time, change control module.There is the features such as reliable operation, antijamming capability is strong, defencive function is perfect, also there is the features such as volume is little, accommodation is wide, DC low-voltage maintenance, energy-saving, noiseless operation simultaneously.
The present invention is achieved in that a kind of anti-flashover intelligent control device, comprise the power rectifier circuit that is connected to electric main, rectification circuit, the interchange power transmission loop that the first normally-closed contact by mechanical switch is connected with the second normally-closed contact, it is characterized in that: the out-put supply of described power rectifier circuit is leaded up to one first switching tube and clamp circuit, be applied to protective circuit two ends, with described protective circuit parallel connection be the ac contactor coil loop that the first normally opened contact by mechanical switch is connected with the second normally opened contact, bidirectional protective circuit module in two ends parallel connection in described ac contactor coil loop, when supply voltage one powers on, connect circuit of mechanical switch control, make first, the second normally-closed contact is opened, first, the second normally opened contact is closed, now, start in DC high voltage in described ac contactor coil loop, the wait state that DC low-voltage keeps, described clamp circuit is used for judging A.C. contactor operating state, and the output of described clamp circuit is divided into two-way ，Yi road one first conversion control circuit and is connected with host scm, and another Lu Jingyi second change-over circuit is connected with circuit of mechanical switch control, another Lu Jingyi switching tube module of the out-put supply of described power rectifier circuit is connected with a switch power module, described switch power module comprises four tunnel outputs, and its first via output circuit is applied to ac contactor coil loop by first, second normally opened contact of voltage regulator module, a second switch pipe, clamp circuit, mechanical switch, No. second output circuit provides bias voltage for the first switching tube and second switch pipe, ，Yi road, Third Road output circuit Fen San road provides charge power supply for back-up source charging module, the auxiliary single-chip microcomputer power supply of another Lu Weiyi, and also having a road 1 the 3rd conversion control circuit is circuit of mechanical switch control power supply, the output of described circuit of mechanical switch control is provided with first, second normally-closed contact and first, second normally opened contact ， No. tetra-output circuits are host scm power supply, the output of described Si road output circuit is connected with power supply feedback module, and the output of described power supply feedback module is connected with described switching tube module, the output of described host scm is connected with the control module of second switch pipe with the drive control module of the first switching tube, described host scm is also connected with and gathers the starting voltage sampling circuit of rectification circuit output signal, control circuit and man-machine interaction, alarm module and a back-up source control module of collection clamp circuit output signal, the output of described back-up source control module is connected with a power backup circuit, and described power backup circuit is also respectively host scm and the power supply of auxiliary single-chip microcomputer through first, second voltage reduction module,
After this anti-flashover intelligent control device powers on, first by host scm, through the 4th change-over circuit, to circuit of mechanical switch control, send control signal, mechanical switch is obtained electric, it is first years old, two normally opened contacts are closed, first, two normally-closed contacts are opened, simultaneously, starting voltage sampling circuit, host scm is by port judgement supply voltage situation, if voltage is within the scope of A.C. contactor normal working voltage, by main single-chip microcomputer system, send instruction, by control signal, to drive control module, apply high level, the first switching tube conducting, now A.C. contactor enters DC high voltage start-up period, when A.C. contactor starting process finishes, by host scm, send instruction, turn-off the first switching tube, pass through control module, starting second switch pipe, A.C. contactor enters low-voltage direct and keeps the stage, the second tunnel of AC power offers power rectifier circuit, this power rectifier circuit is after rectification filtering module, out-put supply is leaded up to the first switching tube, pass through clamp circuit, be applied to protective circuit two ends, in parallel with protective circuit is by first of mechanical switch, the ac contactor coil that two normally opened contacts connect, in the parallel connection of the two ends of ac contactor coil, bidirectional protective circuit module, when supply voltage one powers on, connect circuit of mechanical switch control, make first, two normally-closed contacts are opened, first, two normally opened contacts are closed, described ac contactor coil starts in DC high voltage, the wait state that DC low-voltage keeps, by host scm, in the suitable moment, send A.C. contactor adhesive and sticking instruction, the Third Road of AC power offers rectification circuit, by voltage sample loop, directly supply voltage is sampled,
When anti-flashover intelligent control device is normal, first and second normally opened contact of mechanical switch is closed, anti-shake electric protection function and normal DC high voltage starting, the DC low-voltage that does not affect anti-flashover intelligent control device keeps, energy-saving, noiseless operation operating state, while not shaking electric fault, the operating state of quick disjunction; When anti-flashover intelligent control device itself breaks down, this anti-flashover intelligent control device will start ac power supply circuit automatically, connect first and second normally-closed contact of mechanical switch, automatically cut off anti-flashover intelligent control device, A.C. contactor, directly by ac power supply, does not affect the continuous operation of anti-flashover intelligent control device, starts warning device simultaneously, send alarm signal, on suitable opportunity, change again anti-flashover intelligent control device.
Tool of the present invention has the following advantages:
(1) malfunctioning module excision function.During control module normal operation, starting control module power supply and working procedure, make it to be used in conjunction with A.C. contactor, the effect with anti-flashover intelligent protection, when control module breaks down, supply voltage is when normal, starting commutation circuit, realize AC power and do not pass through control module, the working method of directly powering to ac contactor coil, maintain the normal operation of whole system, send the alarm signal of control module fault simultaneously, on suitable opportunity, change control module, guarantee that the production system of operation works on continuously;
(2) direct current soft start function.The control feature keeping according to DC high voltage starting, low-voltage, designed the control model of start loop, at start-up period, according to contactor state, control its starting process, the spring of close stage unshakable in one's determination and collision are reduced to minimum value, realize the closing course " soft start " of contactor;
(3) anti-shake electric protection function.While occurring to shake electrification in circuit, by control module, control A.C. contactor and remain on sticking state, disjunction under normal circumstances, inoperative back-up source continuous current circuit, the quick disjunction of contactor;
(4) direct current sticking adjustable function.According to the coil of different model A.C. contactor, iron core parameter, the sticking direct voltage of designed, designed and adjustment contactor, module adaptive scope is wide;
(5) crawl that has quick disjunction is controlled function.After adopting intelligent object to control, starting and the dwell time of A.C. contactor are all extended, this is a common fault of current intelligent AC contactor, running into crawl, QA occasion cannot meet the demands, modular design clamper control circuit and conversion control circuit, in the occasion of the quick disjunction contactor of needs, directly make contactor enter quick disjunction mode of operation;
(6) there is demonstration, warning, function that guard time is adjustable.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
As shown in Figure 1, the invention provides a kind of Novel anti-interference electricity intelligent control device, comprise the power rectifier circuit D1 that is connected to electric main, rectification circuit D2, the interchange power transmission loop that the first normally-closed contact K1 by mechanical switch is connected with the second normally-closed contact K2, it is characterized in that: the out-put supply of described power rectifier circuit D1 is leaded up to the first switching tube A, by clamper control circuit I, be applied to protective circuit B1 two ends, with B1 parallel connection be the ac contactor coil loop C that the normally opened contact K3 by mechanical switch is connected with K4, bidirectional protective circuit module B2 in two ends parallel connection at this ac contactor coil loop C, when supply voltage one powers on, connect circuit of mechanical switch control C1, make first, the second normally-closed contact K1, K2 opens, first, the second normally opened contact K3, K4 is closed, described ac contactor coil loop C starts in DC high voltage, the wait state that DC low-voltage keeps, clamper control circuit I is used for judging A.C. contactor operating state, and the output of described clamper control circuit I is divided into two-way ，Yi road one conversion control circuit J1 and is connected with host scm S, and another Lu Jingyi changes shifting circuit J2 and is connected with circuit of mechanical switch control C1, another Lu Jingyi switching tube module K of the out-put supply of described power rectifier circuit D1 is connected with a switch power module M, described switch power module M comprises four tunnel outputs, and its first via output circuit P1 is applied to ac contactor coil loop C by clamp circuit I, second switch pipe B, voltage regulator module R, first, second normally opened contact of mechanical switch K3, K4, No. second output circuit P2 provides bias voltage for the first switching tube A and second switch pipe B, Third Road output circuit P3Fen tri-，Yi roads, road provide charge power supply for back-up source charging module U, and another road is auxiliary single-chip microcomputer S1 power supply, also has a road one conversion control circuit J3, are circuit of mechanical switch control C1 power supply, it is host scm S power supply that the output of described circuit of mechanical switch control C1 has first, second normally-closed contact K1, K2 and first, second normally opened contact K3, K4 ， No. tetra-output circuit P4, the output of described output circuit P4 is connected with power supply feedback module N, and the output of described power supply feedback module N is connected with described switching tube module K, the output of described host scm S is connected with the first control module E of the first switching tube A and the second control module F of second switch pipe B, described host scm S is also connected with and gathers the sampling module H signal 7 of rectification circuit D2 output signal, control circuit J1 signal and man-machine interaction, alarm module S2 and a back-up source control module Q of collection clamp circuit I output signal, the output of described back-up source module Q is connected with a power backup circuit L, and described back-up source is also respectively host scm S1 and auxiliary single-chip microcomputer S2 power supply through first, second voltage reduction module V1, V2.
In order to allow the clearer understanding the present invention of those skilled in the art, below in conjunction with accompanying drawing, operation principle of the present invention is described:
As shown in Figure 1, alternating current 220V power supply is from 1, 2 Fen San road, two ends inputs, one tunnel is through the normally-closed contact K1 of mechanical switch C1, K2 directly provides AC power (this is a key point of the present invention) to contactor coil, after supply voltage powers on, first by host scm S, through change-over circuit J4, to mechanical switch C1, send control signal, mechanical switch C1 is obtained electric, its normally opened contact K3, K4 is closed, normally-closed contact K1, K2 opens, simultaneously, starting voltage sampling circuit H, host scm S is by port 7 judgement supply voltage situations, if voltage is within the scope of A.C. contactor normal working voltage, by main single-chip microcomputer system, send instruction, by control signal 3, apply high level to drive control module E, the first switching tube A conducting, now A.C. contactor enters DC high voltage start-up period, when contactor starting process finishes, by host scm, S sends instruction, turn-off the first switching tube A, by control module F, starting second switch pipe B, contactor enters low-voltage direct and keeps the stage, the second tunnel of AC power offers power rectifier circuit D1 module, this module is after rectification filtering module G1, out-put supply is leaded up to the first switching tube A, by clamp circuit I, be applied to protective circuit B1 two ends, with B1 parallel connection be the ac contactor coil C that the normally opened contact K3 by mechanical switch is connected with K4, in the parallel connection of the two ends of coil C, bidirectional protective circuit module B2, when supply voltage one powers on, connect circuit of mechanical switch control C1, make normally-closed contact K1, K2 opens, normally opened contact K3, K4 is closed, described coil C starts in DC high voltage, the wait state that DC low-voltage keeps, by host scm, in the suitable moment, send contactor adhesive and sticking instruction, the Third Road of AC power offers rectification circuit D2, by sampling module H, directly supply voltage is sampled, and this sample mode has greatly reduced Switching Power Supply to the interference of sampled voltage and impact, has improved the operational reliability of system.
In this stage, there is an important module, i.e. mechanical switch module C1, this module is one of important module of the present invention and characteristic.When anti-flashover intelligent control module is normal, normally opened contact K3, the K4 of mechanical switch are closed, and anti-shake electric protection function and normal DC high voltage starting, the DC low-voltage that does not affect whole control module keeps, energy-saving, noiseless operation operating state.While not shaking electric fault, the operating state of quick disjunction.When anti-flashover intelligent module itself breaks down, this module will be started ac power supply circuit automatically, connect normally-closed contact K1, the K2 of mechanical switch, automatically cut off anti-flashover intelligent control module, A.C. contactor, directly by ac power supply, does not affect the continuous operation of whole control system, starts warning device simultaneously, send alarm signal, on suitable opportunity, change again anti-flashover intelligent control module.This thinking and invention, can be applied in intelligent control module of the same type.
A wherein road of alternating current 220V power supply, after power rectifier circuit D1 rectification, filtering, becomes DC power supply, is divided into following two-way:
(1) the high voltage startup power supply of A.C. contactor.This power supply is added on the coil of A.C. contactor through the first switching tube A, clamp circuit I, mechanical switch normally opened contact K3, K4, and B1, B2 are protective circuit.In the running of A.C. contactor; usually can run into the state of a control that needs fast cut-off circuit or crawl to control; this is difficult for adopting the A.C. contactor system of intelligent control module, and adopting the later contactor of Based Intelligent Control often to start with disjunction all needs the regular hour.Therefore, the present invention to the coil design of A.C. contactor a clamper control circuit I, the function of this circuit is for to judge that whether A.C. contactor is in attracting state, if A.C. contactor is in attracting state, wire loop has electricity, and this clamp circuit will be exported a signal to conversion control circuit J1 so, and this circuit will send control command 5 to host scm, main single-chip microcomputer system is received after the signal of instruction 5, and all control programs normally move; Otherwise, if A.C. contactor in disjunction state, the electromagnetic mechanism of contactor is in off-position; this clamper control circuit will make main single-chip microcomputer system automatically reset; realize being forced shutdown of moment, realize the quick disjunction of contactor or realize crawl and control, inoperative anti-shake electric protection program.Another effect of this clamp circuit I is if supply voltage is normal, after contactor enters the low-voltage direct sticking stage, through conversion control circuit J2, to mechanical switch C1, send command signal, if there is electricity in contactor coil loop, mechanical switch continues to maintain sticking state so, normally opened contact K3, K4 are closed, and normally-closed contact K1, K2 open, inoperative ac power supply circuit; If because control module breaks down; switch power module defencive function will start, and keep loop power-off, and now contactor coil loop is by dead electricity; mechanical switch C1 dead electricity so; its normally opened contact K3, K4 open, and normally-closed contact K1, K2 are closed, now start alternating current (AC) directly-powered loop; by AC power, directly to contactor coil, powered; contactor still maintains sticking state, sends alarm signal simultaneously, and reminding user is changed anti-flashover intelligent control module in due course.
(2), in the present embodiment, described switch power module has adopted the wide voltage input high frequency switch power design based on TinySwith-HX single-chip switching power supply chip TOP254YN.TOP254YN has the functions such as wide range input, under-voltage protection, overvoltage protection, overtemperature protection, current-limiting protection, power switch pipe self adaptation.Once control module breaks down; for example, under overload, short circuit or open loop case; can realize the defencive function of automatic lockout switch power supply; the system for the treatment of recovers normal; can realize again autoboot moving; this power module has good defencive function, stable performance, the feedback circuit that N is Switching Power Supply.This switch power module has four-way power supply output.P1 is the power supply of DC low-voltage holding circuit, normally opened contact K3, K4 through voltage regulator module R, second switch pipe B, clamp circuit I, mechanical switch are applied to contactor coil loop, by voltage regulator module R, can adjust the sticking of contactor and control voltage, to adapt to different A.C. contactors, on panel, this module can be set and adjust.After the reliable adhesive of A.C. contactor, main single-chip microcomputer system S turn-offs control signal 3, opens control signal 4, the first switching tube A is turn-offed, second switch pipe B conducting, A.C. contactor enters DC low-voltage and keeps the stage, F is the control module of second switch pipe B, conducting and the shutoff of control switch pipe B.
P2 provides bias voltage E1, F1 for high-power switch tube A and B, and this power supply and all the other power modules can not be altogether.
When supply voltage being detected lower than A.C. contactor operating voltage, main single-chip microcomputer system turn-offs control signal 4, opens control signal 8, back-up source control module Q starts working, starting power backup circuit L, because now supply voltage power supply is undesired, therefore back-up source is also necessary for main single-chip microcomputer system S power supply, back-up source produces a suitable power supply through step-down control module V1, for main single-chip microcomputer system power supply, through step-down control module V2, producing a suitable power supply is auxiliary single-chip microcomputer power supply.
P3 provides required supply voltage for back-up source module U, auxiliary computer S1, mechanical switch C1.Full-automatic charging circuit is by auxiliary single-chip microcomputer S1 control system monitoring and starting, back-up source charging system adopts separately auxiliary computer chip S1 to control, this charging system can Real-Time Monitoring back-up source electric weight, once find that electric weight is not enough, just start charging control loop, to battery real time charging, guarantee that the electric weight of battery is in normal range (NR).Main single-chip microcomputer system is realized DC high voltage starting, low-voltage maintenance, anti-flashover intelligent control protection, malfunctioning module excision conversion, display alarm, energy-saving, noiseless operation control.This scheme is controlled flexibly, reliable operation.
P4 is the power supply of main single-chip microcomputer system.At supply voltage, during in normal value, main single-chip microcomputer system is powered by P4, and backup power system is all the time in stand-by state, and battery is isolated with circuit completely, except self-discharge phenomenon, does not have the consumption of other any electric energy.Once there is voltage, fall fault, the power supply of starting back-up source.
Switching Power Supply adopts the shielding winding high frequency transformer of autonomous Design, adopts stack winding, not only saves wire, reduces volume and cost, can also strengthen mutual induction amount between winding, increases degree of coupling; Shield winding simultaneously and can strengthen jamproof ability, prevent that High-frequency Interference is to space radiation, system works performance is more reliable.
Display module S2 has the functions such as anti-shake electric fault guard time is adjustable, fault alarm, normal operation indication, control board failover, holding voltage is adjustable.
The foregoing is only preferred embodiment of the present invention, all equalizations of doing according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (1)
1. an anti-flashover intelligent control device, comprise the power rectifier circuit that is connected to electric main, rectification circuit, the interchange power transmission loop that the first normally-closed contact by mechanical switch is connected with the second normally-closed contact, it is characterized in that: the out-put supply of described power rectifier circuit is leaded up to one first switching tube and clamp circuit, be applied to protective circuit two ends, with described protective circuit parallel connection be the ac contactor coil loop that the first normally opened contact by mechanical switch is connected with the second normally opened contact, bidirectional protective circuit module in two ends parallel connection in described ac contactor coil loop, when supply voltage one powers on, connect circuit of mechanical switch control, make first, the second normally-closed contact is opened, first, the second normally opened contact is closed, now, start in DC high voltage in described ac contactor coil loop, the wait state that DC low-voltage keeps, described clamp circuit is used for judging A.C. contactor operating state, and the output of described clamp circuit is divided into two-way ，Yi road one first conversion control circuit and is connected with host scm, and another Lu Jingyi second change-over circuit is connected with circuit of mechanical switch control, another Lu Jingyi switching tube module of the out-put supply of described power rectifier circuit is connected with a switch power module, described switch power module comprises four tunnel outputs, and its first via output circuit is applied to ac contactor coil loop by first, second normally opened contact of voltage regulator module, a second switch pipe, clamp circuit, mechanical switch, No. second output circuit provides bias voltage for the first switching tube and second switch pipe, ，Yi road, Third Road output circuit Fen San road provides charge power supply for back-up source charging module, the auxiliary single-chip microcomputer power supply of another Lu Weiyi, and also having a road 1 the 3rd conversion control circuit is circuit of mechanical switch control power supply, the output of described circuit of mechanical switch control is provided with first, second normally-closed contact and first, second normally opened contact ， No. tetra-output circuits are host scm power supply, the output of described Si road output circuit is connected with power supply feedback module, and the output of described power supply feedback module is connected with described switching tube module, the output of described host scm is connected with the drive control module (E) of the first switching tube and the control module (F) of second switch pipe, described host scm is also connected with and gathers the starting voltage sampling circuit of rectification circuit output signal, control circuit and man-machine interaction, alarm module and a back-up source control module of collection clamp circuit output signal, the output of described back-up source control module is connected with a power backup circuit, and described power backup circuit is also respectively host scm and the power supply of auxiliary single-chip microcomputer through first, second voltage reduction module,
After this anti-flashover intelligent control device powers on, first by host scm (S), through the 4th change-over circuit (J4), send control signal to circuit of mechanical switch control (C1), mechanical switch is obtained electric, it is first years old, two normally opened contact (K3, K4) closure, first, two normally-closed contact (K1, K2) open, simultaneously, starting voltage sampling circuit (H), host scm (S) is by port (7) judgement supply voltage situation, if voltage is within the scope of A.C. contactor normal working voltage, by main single-chip microcomputer system, send instruction, by control signal (3), apply high level to drive control module (E), the first switching tube (A) conducting, now A.C. contactor enters DC high voltage start-up period, when A.C. contactor starting process finishes, by host scm (S), send instruction, turn-off the first switching tube (A), by control module (F), starting second switch pipe (B), A.C. contactor enters low-voltage direct and keeps the stage, the second tunnel of AC power offers power rectifier circuit (D1), this power rectifier circuit is after rectification filtering module (G1), out-put supply is leaded up to the first switching tube (A), by clamp circuit (I), be applied to protective circuit (B1) two ends, in parallel with protective circuit (B1) is by first of mechanical switch, two normally opened contact (K3, K4) ac contactor coil (C) connecting, in the two ends parallel connection of ac contactor coil (C), bidirectional protective circuit module (B2), when supply voltage one powers on, connect circuit of mechanical switch control (C1), make first, two normally-closed contact (K1, K2) open, first, two normally opened contact (K3, K4) closure, described ac contactor coil (C) starts in DC high voltage, the wait state that DC low-voltage keeps, by host scm (S), in the suitable moment, send A.C. contactor adhesive and sticking instruction, the Third Road of AC power offers rectification circuit (D2), by voltage sample loop (H), directly supply voltage is sampled,
When anti-flashover intelligent control device is normal, first and second normally opened contact of mechanical switch (K3, K4) closure, anti-shake electric protection function and normal DC high voltage starting, the DC low-voltage that does not affect anti-flashover intelligent control device keeps, energy-saving, noiseless operation operating state, while not shaking electric fault, the operating state of quick disjunction; When anti-flashover intelligent control device itself breaks down, this anti-flashover intelligent control device will start ac power supply circuit automatically, connect first and second normally-closed contact (K1, K2) of mechanical switch, automatically cut off anti-flashover intelligent control device, A.C. contactor, directly by ac power supply, does not affect the continuous operation of anti-flashover intelligent control device, starts warning device simultaneously, send alarm signal, on suitable opportunity, change again anti-flashover intelligent control device.
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| CN105098972A (en) * | 2014-05-23 | 2015-11-25 | 上海华建电力设备股份有限公司 | Anti-interference electricity contactor time delay device |
| CN108521169B (en) * | 2018-06-11 | 2023-05-23 | 泰豪科技股份有限公司 | Anti-interference circuit and system |
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| US6731023B2 (en) * | 2001-03-29 | 2004-05-04 | Autoliv Asp, Inc. | Backup power supply for restraint control module |
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2011
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101309003A (en) * | 2008-06-27 | 2008-11-19 | 东南大学 | Synthetic apparatus of anti-flashover and protection for low-voltage three phase asynchronous motor |
| CN101866777A (en) * | 2010-05-14 | 2010-10-20 | 东南大学 | Reverse flux-weakening control type intelligent permanent magnet contactor with no position sensor |
| CN101976880A (en) * | 2010-11-11 | 2011-02-16 | 福州大学 | Intelligent device for voltage dip protection |
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