CN201673862U - Intelligent permanent magnetic alternating current contactor controlled by weak magnet - Google Patents
Intelligent permanent magnetic alternating current contactor controlled by weak magnet Download PDFInfo
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- CN201673862U CN201673862U CN201020191420XU CN201020191420U CN201673862U CN 201673862 U CN201673862 U CN 201673862U CN 201020191420X U CN201020191420X U CN 201020191420XU CN 201020191420 U CN201020191420 U CN 201020191420U CN 201673862 U CN201673862 U CN 201673862U
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Abstract
The utility model discloses an intelligent permanent magnetic alternating current contactor controlled by weak magnet, which comprises a microprocessor, a rectifier filter circuit, a control voltage detection module, a switch control circuit, a power switch, a coil voltage/current detection circuit, a switch power supply circuit, a reserve power supply control module and the like, wherein a first switch control circuit drives power switches Q1 and Q3 to break over and achieve reverse weak magnet of coils. The intelligent permanent magnetic alternating current contactor controlled by weak magnet estimates real time displacement signals of movable iron cores during the switching on process of the contactor through detecting coil voltage in real time to achieve a no-displacement sensor detection method. The switching on process of the contactor forms intelligent closed loop operation of detection-feedback-adjustment-control by the feedback of the displacement signals of movable iron cores through using a reverse weak magnet control strategy, thereby leading dynamic suction power and counter force thereof to be excellent matched, reducing primary and secondary bounce of contacts, and increasing the electrical and the mechanical life of the contactor.
Description
Technical field
The utility model relates to the intelligent permanent magnet contactor of the oppositely weak magnetic control system of a kind of position-sensor-free, has realized the intelligent dynamically control of the making process of permanent magnet contactor, belongs to intelligent low voltage electrical apparatus technology field.
Background technology
Permanent magnet contactor is as a kind of new switching equipment based on new principle and permanent magnetism application technology, it is except the repertoire of realizing electromagnetic contactor, also have considerable energy saving, noiselessness, be not subjected to that voltage ripple of power network influences, coil is difficult for burning, advantages such as anti-rolling electrical property and high reliability, become a research focus of appliance field.In recent years, focus mostly in novel permanent magnetic operating mechanism, simulation and electronic control circuit aspect, obtained quite useful achievement about the research of permanent magnet contactor.By retrieval, the patent No. is the Chinese patent of 200920038135.1 patent " a kind of control device of permanent magnet contactor " and the Chinese patent of the patent " permanent-magnet double steady-state contactor " that the patent No. is 200410062796.x, and the patent No. is that the Chinese patent of 200920041428.5 patent " energy-saving run noiseless permanent magnet mechanism contactor and control unit thereof " all discloses a kind of novel permanent magnetic operating mechanism and adopts analog controlling unit to realize divide-shut brake control to permanent magnet contactor.Yet, existing permanent-magnet manipulating mechanism of joining the simulation electronic control unit can only be realized branch, the "on" position control of contactor, can not control its course of action, thereby can not realize controlling moving contact, movingly unshakable in one's determinationly carry out the dynamic characteristic that branch, closing operation improve the permanent magnet contactor motion process by desirable curve movement.Can only obviously can not satisfy simultaneously the requirement of distribution system automation as the permanent magnet contactor of single switchgear, this has just promoted contactor to develop to intelligent, multi-functional, high-performance direction.Along with sensor technology, electronic technology and improvement of computer science, intelligent electrical apparatus has been subjected to people's attention, the observation and control technology that with the microprocessor is core successfully is applied in the various low-voltage electrical apparatuses, has improved the dynamic quality of low-voltage electrical apparatus, the reliability of power supply and the fail safe of electrical network.The patent No. is that 03108018.9 the patent Chinese patent that " reduces the method for Twin coil bistable permanent magnet organization probe of contactor spillage of material " and the patent No. are the Chinese patent of 200920089918.2 patent " intelligent permanent magnet vacuum A.C. contactor ", and the patent No. is that the Chinese patent that 200820126036.4 patent " is applicable to the intelligent permanent magnet contactor of industrial motor control " has all adopted digitized process chip to realize the function of intellectuality control, detection and the communication of permanent magnet contactor.Yet in the intelligent control circuit of above patent permanent magnet contactor, not making full use of various signal feedback by the introducing microprocessor makes it have closed-loop control, adopt the modern digital control device to realize the intelligent close loop maneuver of permanent magnet contactor detection-feedback-adjusting-control, thereby the permanent magnet contactor motion process is carried out Intelligent Dynamic control, make the dynamic suction and the counter-force of contactor reach good fit, reduce the impact velocity between sound iron core and dynamic/static contact, realize the adhesive control under the optimal motion characteristic, reduce one of contact effectively, the secondary spring, the electric and mechanical endurance of improving contactor.
When adhesive permanent magnet contactor under the 85%-110% rated voltage of GB regulation, in whole motion process, voltage is higher, pull characteristics are more precipitous, much larger than counter-force, under this suction, moving iron core constantly is accelerated, impact velocity is too fast when causing the contact of dynamic and static contact, has aggravated the once spring of contact.After contact closure, moving iron core also is kept in motion, has certain kinetic energy, simultaneously along with moving reducing of displacement unshakable in one's determination, the suction increasing degree that permanent magnet produces is very big, this moment, suction comprised the two-part active force of suction that electromagnetic attraction and permanent magnet produce, make contactor very big in the suction nargin in latter stage of closing a floodgate, in self kinetic energy, the effect of electromagnetic attraction and permanent magnetism suction three parts drives down moving motion unshakable in one's determination and overcomes the spring counter-force and make permanent magnet contactor realize closing a floodgate, thereby cause moving, the fixed core impact velocity is too fast, collision energy is bigger, thereby the generation that the secondary that has aggravated contact bounces and then the electric arc of generation seriously reduce the contactor electrical endurance to the ablation effect of contact, the harm that the secondary spring causes is more moving, fixed contact rigidly connects when touching collision and serious many of harm that the once spring that produces causes, particularly when connecting motor or lighting load, because of starting current often greatly to 6～10 times of rated current, the repeatedly spring that occurs under this big electric current can aggravate the erosion of electric arc to contact greatly, even can produce the melting welding fault of contact, have a strong impact on and work in (the starting of cage induction motor of AC3 use classes, disjunction in the running) the electric and mechanical endurance of contactor under.Therefore avoiding first and second spring of contact is the key that improves contactor electrical endurance and reliability.
For obtaining of the moving displacement unshakable in one's determination of contactor, be to adopt at first in the inner way that displacement or velocity measuring device are installed of contactor, as optical pickocff, linear induction transducer etc.This method has the following disadvantages: at first, the price of displacement or velocity transducer is higher, and this can cause the increase greatly of cost; Secondly, the inner space of contactor is the environment of big noise, strong vibration or even a high temperature, and existing various transducers often are not enough to bear hundreds of thousands even inferior reciprocating action up to a million on the market; Once more, the size of displacement or velocity transducer is all bigger, has obviously increased the volume of contactor.Contactor for small dimension can't be installed, and versatility is not strong, and the increase of movable link quantity simultaneously not only can make the fault probability rise also can produce certain influence to the dynamic characteristic of contactor itself.
Summary of the invention
Technical problem: at the defective or the deficiency of above-mentioned prior art existence, the purpose of this utility model is to provide a kind of intelligent permanent magnet AC contactor of oppositely weak magnetic control system, adopt the Modern microprocessor control device, realize the intelligent dynamically control of Making Process of Permanent Magnet Contactor.Analyze from magnetic circuit and circuit aspect, seek the contact between them, derive the computing formula of moving displacement unshakable in one's determination of permanent magnet contactor and coil voltage, coil current, and then realize estimating the method that displacement unshakable in one's determination is moved in each detection of a kind of position-sensor-free of moving displacement signal unshakable in one's determination constantly of contactor making process by the live signal of magnetic test coil voltage, coil current.As feedback signal, the making process of contactor is formed the intelligent close loop maneuver of detection-feedback-adjusting-control with the displacement moving unshakable in one's determination of this real-time tracking.According to displacement signal, at the preliminary stage that closes a floodgate (i.e. shake-up stage to overtravel stage), apply a pwm voltage that is lower than a fixed duty cycle under the rated voltage, feedback by displacement signal and coil voltage signal, control voltage at this displaced segments hold-in winding is stable, make a little higher than spring load characteristic of dynamic suction of its generation, reduce the speed that dynamic and static contact contacts moment, effectively reduce the once spring of contactor.When the displacement point moving unshakable in one's determination that detects oppositely weak magnetic control system, microprocessor power controlling switch conduction respectively applies reverse voltage with shutoff to coil, control coil produces reverse current, realize the oppositely weak magnetic of coil magnetic field to permanent magnet, make the dynamic suction and the counter-force of permanent magnet contactor reach good fit, realize the low speed collision of dynamic and static iron core in combined floodgate latter stage even reach moving soft landing unshakable in one's determination, effectively reduce the secondary spring of contact, thereby realized the combined floodgate control under the permanent magnet contactor optimal motion characteristic, the electric and mechanical endurance of comprehensively improving permanent magnet contactor.
Technical scheme: for achieving the above object, the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system of the present utility model adopts following technical scheme:
The intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system of the present utility model is the center with the microprocessor, the input of microprocessor connects the output of control voltage detection module, stand-by power supply control module, coil voltage/current detection circuit respectively, and the output of microprocessor connects the input of first ON-OFF control circuit, second switch control circuit respectively; The AC power input connects the input of current rectifying and wave filtering circuit, control voltage detection module, switching power circuit respectively; The output one tunnel of current rectifying and wave filtering circuit connects first power switch, coil, the 3rd power switch successively, and another road connects second power switch, coil, the 4th power switch successively; The input of coil connecting coil voltage/current detection circuit; The first ON-OFF control circuit output connects the input of first power switch, the 3rd power switch respectively, and second switch control circuit output connects the input of second power switch, the 4th power switch respectively; Switching power circuit connects the input of stand-by power supply control module, and the output of stand-by power supply control module connects the input of microprocessor, second switch control circuit respectively.
Described control voltage detection module is a core with Hall voltage transducer VSM025A, an input L of AC power input links to each other with the 1st pin of Hall voltage transducer by the 28 resistance, and another input N links to each other with the 2nd pin of Hall voltage transducer; The 3rd pin of DC/DC module, the 5th pin link to each other with the 4th pin, the 5th pin of Hall voltage transducer respectively; An end links to each other with the 3rd pin of Hall voltage transducer, an end of the 30 resistance after the 29 resistance and the 7th voltage-stabiliser tube parallel connection, and the other end links to each other with the power supply ground of first via working power VCC, the 4th pin of DC/DC module, an end of the 24 electric capacity; The other end of the 30 resistance links to each other with the 18th pin of the other end of the 24 electric capacity, microprocessor, and two inputs of DC/DC module link to each other with Third Road working power 5V, 0V in the switching power circuit respectively.
First electric capacity is parallel to the two ends of AC power input in the described switching power circuit, the L end of AC power input connects the 1st pin of an AC/DC module, the 2nd AC/DC module respectively, and the N end of AC power input connects the 2nd pin of an AC/DC module, the 2nd AC/DC module respectively; Second electric capacity, the 3rd electric capacity are parallel between the 4th pin and the 3rd pin of first via output of an AC/DC module, export first via working power VCC; The 4th electric capacity, the 5th electric capacity are parallel between the 6th pin and the 5th pin of an AC/DC module the second tunnel output, export the second tunnel working power VCC1; The 6th electric capacity, the 7th electric capacity are parallel between the 3rd pin and the 4th pin of the 2nd AC/DC module output, output Third Road 5V working power, and wherein an AC/DC module model is XMA3.5-WD05P05M, the 2nd AC/DC module model is DBA2.5-S05W.
Described first ON-OFF control circuit, second switch control circuit comprise the input connector that is connected with the input of alternating current 220V power supply, the input of AC power links to each other with the input of rectifier bridge through fuse, and the 8th electric capacity, piezo-resistance are parallel to the input of rectifier bridge; The anode of rectifier bridge output connects the J2-1 end of electric current input connector through first diode, the 9th electric capacity, the tenth electric capacity, first resistance link to each other with the negative terminal of first diode with the 11 electric capacity, the 12 electric capacity, second resistance series connection back, one end respectively, and the other end links to each other with the output negative terminal of rectifier bridge; One end of the negative terminal of the 9th electric capacity, the tenth electric capacity, first resistance links to each other with the anode of the 11 electric capacity, the 12 electric capacity, an end of second resistance respectively; The 3rd resistance, the 4th resistance series connection back one end link to each other with electric current input connector J2-1 end, and the other end links to each other with the output negative terminal of rectifier bridge; The first via working power VCC of switching power circuit is respectively by the 5th resistance, the 8th resistance respectively with the 5th optocoupler, the 1st pin of the 6th optocoupler links to each other, the 5th optocoupler, the 2nd pin of the 6th optocoupler connects the 26th pin of microprocessor, the 3rd DC/DC module, output the 4th pin of the 4th DC/DC module connects the 5th optocoupler respectively, the 4th pin of the 6th optocoupler, the 5th optocoupler, the 3rd pin of the 6th optocoupler is respectively by the 6th resistance, the 9th resistance respectively with the first power switch Q1, the grid of the 3rd power switch Q3 connects, simultaneously the 3rd pin of the 5th optocoupler by the 7th resistance respectively with the source class of the first power switch Q1, the 3rd pin of the 3rd DC/DC module, coil connector J3-2 end, the drain electrode of the 4th power switch Q4 is connected, the 3rd pin of the 6th optocoupler by the tenth resistance respectively with the source class of the 3rd power switch Q3, the 3rd pin of the 4th DC/DC module, the output negative terminal of rectifier bridge, the source electrode of the 4th power switch Q4, be connected together the power supply of the second tunnel working power VCC1; Power supply CPU_VCC in the stand-by power supply control module is respectively by the 11 resistance, the 12 resistance respectively with the 9th optocoupler, the 1st pin of the tenth optocoupler links to each other, the 9th optocoupler, the 2nd pin of the tenth optocoupler connects the 15th pin of microprocessor, the 7th DC/DC module, output the 4th pin of the 8th DC/DC module connects the 9th optocoupler respectively, the 4th pin of the tenth optocoupler, the 9th optocoupler, the 3rd pin of the tenth optocoupler is respectively by the 12 resistance, the 15 resistance respectively with the second power switch Q2, the grid of the 4th power switch Q4 connects, the 3rd pin of the 9th optocoupler by the 13 resistance respectively with the source class of the second power switch Q2, the 3rd pin of the 7th DC/DC module, coil connector J3-1 end, the drain electrode of the 3rd power switch Q3 is connected; The 3rd pin of the tenth optocoupler is connected with the source class of the 4th power switch Q4, the 3rd pin of the 8th DC/DC module respectively by the 16 resistance; The drain electrode of the first power switch Q1, the second power switch Q2 and connector J2-2 end are connected together; Two inputs of the 3rd DC/DC module, the 4th DC/DC module link to each other with first via working power VCC, GND in the switching power circuit respectively, input the 1st pin of the 7th DC/DC module, the 8th DC/DC module links to each other with the CPU_VCC in the stand-by power supply control module, and the 2nd pin of the 7th DC/DC module, the 8th DC/DC module links to each other with GND; Second diode, the 3rd diode, the 4th diode, the 5th diode are connected anti-parallel to respectively between the drain electrode and source electrode of power switch Q1, Q2, Q3, Q4, are used for the protection of power switch; Wherein the model of the 3rd DC/DC module, the 4th DC/DC module, the 7th DC/DC module, the 8th DC/DC module is 14D-05S12NCNL, and the model of power switch Q1, Q2, Q3, Q4 is MOSFET-IRFP350.
Described first ON-OFF control circuit drives the first power switch Q1 and the real-time conducting of the 3rd power switch Q3 realizes that the forward of coil in the making process increases magnetic; The second switch control circuit drives the second power switch Q2 and the real-time conducting of the 4th power switch Q4, realizes the oppositely weak magnetic of coil in the making process.
Described coil voltage/current detection circuit is a core with linear optical coupling device HCNR200, by the 3rd resistance, the 4th resistance to the coil voltage dividing potential drop after, enter the input port COIL_Vol of coil voltage testing circuit, link to each other with first amplifier by the 19 resistance one tunnel then, link to each other with the 1st pin of linear optical coupling device by the 20 resistance, the second tunnel working power VCC1 links to each other with the 2nd pin of linear optical coupling device; The 3rd pin of another road and linear optical coupling device connects, and the 4th pin of linear optical coupling device links to each other with the power supply ground of the second tunnel working power VCC1; Output the 5th, 6 pins of linear optical coupling device link to each other with the 3rd, 2 pins of second amplifier respectively, the 11st pin of second amplifier links to each other with the power supply ground of first via working power VCC, the anode of 5V voltage-stabiliser tube respectively, and 5V voltage-stabiliser tube negative terminal connects the 17th pin of microprocessor after by the 22 resistance, the 20 capacitor filtering; The connector input port J2-1 of coil current by the 23 resistance with input port J2-2, link to each other to Third Road 5V working power, the connector input port J2-1 of coil current is leaded up to the 24 resistance and is linked to each other with the 3rd amplifier, link to each other with the 1st pin of linear optical coupling device by the 25 resistance, Third Road working power 5V links to each other with the 2nd pin of linear optical coupling device; Another road links to each other with the 3rd pin of linear optical coupling device, and the 4th pin of linear optical coupling device links to each other with the power supply ground of Third Road working power 5V; Output the 5th, 6 pins of linear optical coupling device link to each other with the 3rd, 2 pins of four high guaily unit respectively, the 11st pin of four high guaily unit links to each other with the power supply ground of first via working power VCC, the anode of 5V voltage-stabiliser tube respectively, and the negative terminal of 5V voltage-stabiliser tube connects the 20th pin of microprocessor after by the 27 resistance, the 23 capacitor filtering.
Beneficial effect: the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system of the present utility model, adopt modern digital chemical control system means, realized the intelligent dynamically control of the detection-feedback-adjusting-control of Making Process of Permanent Magnet Contactor.Go out the relational expression of the moving displacement unshakable in one's determination of permanent magnet contactor and coil voltage, coil current by analytical derivation, and then realize estimating a kind of position-sensor-free detection method that the contactor making process moves real-time displacement signal unshakable in one's determination by the live signal of magnetic test coil voltage, coil current to the magnetic circuit model of equivalence and circuit model.According to displacement signal feedback moving unshakable in one's determination, the preliminary stage that is closing a floodgate, the coil two ends apply a little higher than spring load characteristic of electromagnetic attraction that a pwm voltage less than the fixed duty cycle of rated voltage makes its generation, reduce moving kinetic energy unshakable in one's determination and slow down moving movement velocity unshakable in one's determination, reduce the collision energy that dynamic and static contact contacts moment, effectively reduce the once spring of contactor.When the displacement point moving unshakable in one's determination that detects oppositely weak magnetic control system is the overtravel stage, with this displacement as feedback signal, microprocessor power controlling switch conduction and shutoff respectively makes coil apply reverse voltage, control is by the reverse current of coil, realize the oppositely weak magnetic of the magnetic field of coil generation to permanent magnet, contactor is reduced significantly at the permanent magnetism suction that closes a floodgate latter stage, make the dynamic suction and the counter-force of contactor reach best fit, to realize moving soft landing unshakable in one's determination, realize the combined floodgate control under the optimal motion characteristic, effectively reduce the secondary spring of contact, the electric and mechanical endurance of comprehensively having improved permanent magnet contactor.
Description of drawings
Fig. 1 is the intelligent permanent magnet AC contactor theory diagram of described a kind of oppositely weak magnetic control system;
Fig. 2 is described oppositely weak magnetic control system policy map;
Fig. 3 is described control voltage detection module circuit diagram;
Fig. 4 is described microprocessor circuit figure;
Fig. 5 is described switching power circuit figure;
Fig. 6 is the described energy supply control module circuit diagram that has;
Fig. 7 is described ON-OFF control circuit figure;
Fig. 8 is described coil voltage/current detection circuit figure;
Fig. 9 is the intelligent permanent magnet AC contactor program main flow chart of described a kind of oppositely weak magnetic control system;
Figure 10 (a) is the described contact bounce experimental waveform figure under the oppositely weak magnetic control system that do not adopt; Figure 10 (b) is contact bounce experimental waveform figure under the oppositely weak magnetic control system of described employing.
Embodiment:
As shown in Figure 1, the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system of the present utility model mainly comprises microprocessor 1, current rectifying and wave filtering circuit 2, control voltage detection module 3, ON-OFF control circuit, power switch, coil voltage/current detection circuit 8, switching power circuit 4, stand-by power supply control module 5 etc.Wherein first ON-OFF control circuit, 6 driving first power switch Q1 and the 3rd power switch Q3 conducting realize that the forward of coil increases magnetic; Second switch control circuit 7 drives the oppositely weak magnetic of the second power switch Q2 and the 4th power switch Q4 conducting realization coil.AC power is imported 14 first via through current rectifying and wave filtering circuit 2, for coil provides required smooth dc voltage.AC power is imported 14 the second the tunnel and is linked to each other with the input of microprocessor 1 through control voltage detection module 3, and control voltage detection module 3 detection external communication magnitudes of voltage are for microprocessor 1 divide-shut brake permanent magnet contactor provides foundation.AC power is imported 14 Third Roads provide three tunnel+5V for whole operating circuit through switching power circuit 4 working power.Wherein first via VCC working power is mainly as the working power of module chips such as stand-by power supply control module 5, first ON-OFF control circuit 6, the second road VCC1 working power is mainly as the working power of coil voltage testing circuit 8, and Third Road 5V working power is mainly as the working power of coil current testing circuit 8.First via VCC working power in the switching power circuit 4 is 5 chargings of stand-by power supply control module simultaneously, and stand-by power supply control module 5 provides reliable working power for microprocessor 1, second switch control circuit 7, so that the reliable separating brake of the contactor after the outage.
As shown in Figure 2, the oppositely weak magnetic control system policy map of the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system of the present utility model, during the adhesive permanent magnet contactor, in whole motion process, voltage is higher under the rated voltage of regulation, thereby pull characteristics are more precipitous, much larger than counter-force, under this suction, moving iron core constantly is accelerated, impact velocity is too fast when causing the contact of dynamic and static contact, has aggravated the once spring of contact.Simultaneously along with moving reducing of displacement unshakable in one's determination, the suction increasing degree that permanent magnet produces is very big, this moment is by electromagnetic attraction and the two-part active force of permanent magnetism suction, make it very big in the suction nargin in latter stage of closing a floodgate, thereby cause dynamic and static impact velocity unshakable in one's determination too fast, collision energy is bigger, and the electric arc that has aggravated the generation of secondary spring of contact and then generation seriously reduces the contactor electrical endurance to the ablation effect of contact, has a strong impact on the electric and mechanical endurance that works in contactor under the AC3 use classes.Based on above reason, the present invention proposes oppositely weak magnetic control system strategy in the making process, according to moving displacement signal unshakable in one's determination, during the shake-up stage to overtravel stage of closing a floodgate, (be displacement 0≤x≤x among Fig. 2
1), apply a PWM modulation voltage U less than the fixed duty cycle of 85%-110% rated voltage
1, and the feedback by its displacement signal and coil voltage, stable at the control voltage of this displaced segments hold-in winding, make a little higher than spring load characteristic of electromagnetic attraction of generation, control the dynamic and static contact contact impact velocity of moment, effectively reduce the once spring of contactor.When the displacement point that detects oppositely weak magnetic control system (is a displacement x among Fig. 2
1≤ x≤x
2), microprocessor 1 power controlling switch conduction respectively applies reverse voltage U with shutoff to coil
2The reverse current of control coil, realize the oppositely weak magnetic of the magnetic field of coil generation to permanent magnet, make the dynamic suction and the counter-force of permanent magnet contactor reach good fit, realize moving soft landing unshakable in one's determination, reduce the secondary spring of contact effectively, thus the electric and mechanical endurance of comprehensively improving permanent magnet contactor under the AC3 operation class (of an amplifying stage).
As shown in Figure 3, control voltage detection module 3 of the present utility model is a core with Hall voltage transducer VSM025A, an input L of AC power input 14 links to each other with the 1st pin of Hall voltage transducer U14 by the 28 resistance R 28, and another input N links to each other with the 2nd pin of Hall voltage transducer U14.The 3rd pin of DC/DC module U15, the 5th pin link to each other with the 4th pin, the 5th pin of Hall voltage transducer U14 respectively.An end links to each other with the 3rd pin of Hall voltage transducer U14, an end of the 30 resistance R 30 after the 29 resistance R 29 and the 7th voltage-stabiliser tube D7 parallel connection, and the other end links to each other with the power supply ground of first via working power VCC, the 4th pin of DC/DC module U15, an end of the 24 capacitor C 24.The other end of the 30 resistance R 30 links to each other with the 18th pin of the other end of the 24 capacitor C 24, microprocessor 1, and two inputs of DC/DC module U15 link to each other with Third Road working power 5V, 0V in the switching power circuit 4 respectively.The Hall element that is adopted is used Hall effect closed loop principle, can under electrically isolated condition, measure the voltage or the electric current of direct current, interchange, pulse and various irregular waveforms, be widely used in the systems such as frequency control, servomotor traction, motor measurement and control.During measuring voltage, the 28 resistance R of connecting in loop, the former limit of transducer 28 backs are in parallel with AC power, for making transducer reach optimum precision, select the size of the 28 resistance R 28 to make former limit input current about rated value 10mA as far as possible, for guaranteeing the stability of measuring resistance, the power of the 28 resistance R 28 is selected in more than the 10W.The 29 resistance R 29 is converted to voltage signal with transducer secondary output current signal; the 7th voltage-stabiliser tube D7 plays the voltage-stabilizing protection effect, and voltage signal is sent into the 18th pin of microprocessor 1 after the 7th voltage-stabiliser tube D7 overvoltage protection and the 24 composition filter circuit filtering of the 30 resistance R the 30, the 24 capacitor C.The turn ratio of VSM025A is 3000: 1200, so control voltage actual value Cntrl_Vol and alternating voltage U
JLFollowing relation: Cntrl_Vol=0.4 (R28/R29) * U is arranged
JL
As shown in Figure 4, microprocessor 1 of the present utility model is the core of the dynamic control of whole intellectuality, drives first ON-OFF control circuit 6 and the corresponding operation of second switch control circuit 7 execution by the signal that receives control voltage detection module 3, the signal of coil voltage/current detection circuit 8.Satisfy anti-interference, miniaturization and the fast requirement of execution speed for fine, microprocessor 1 of the present invention has been selected the STC12 series monolithic, and its model is STC12C5612AD.STC12C5612AD is the single-chip microcomputer of the single clock/machine cycle (1T) of macrocrystalline science and technology production, is high speed, low-power consumption and superpower jamproof 8051 single-chip microcomputers of new generation.The fully compatible tradition 8051 of its instruction code, but speed than fast 8-12 times, be particularly useful for strong jamming occasions such as Electric Machine Control.Operating voltage: 3.5V-5.5V; Operating frequency: 0-35MHz is equivalent to common 8051 0-420MHz; Inside is integrated the RAM of 768 bytes (256 routines, 512 expansions), 8 tunnel 10 precision high-speed a/d converters, and speed can reach 100KHz (100,000 times/second); 4 road programmable counter arrays (PCA), all PCA modules all can be used as PWM output; Two special uses, 16 bit timing device T0 and T1 are arranged, and the PCA module can realize 4 16 bit timing devices again; Utilize the ISP/IAP technology Data Flash of inner 12K byte can be used as EEPROM and use, carry out easily that byte is read, byte programming and sector erasing etc., its erasable number of times reaches more than 100,000 times.In addition, watchdog function has been introduced in inside, is very easy to the reliability design of Single Chip Microcomputer (SCM) system.The 3rd of microprocessor 1 the links to each other with crystal oscillator Y1, the 13 capacitor C the 13, the 14 capacitor C 14 respectively with 4 pins among the figure, as the clock circuit of microprocessor 1.The 31st pin of microprocessor 1 links to each other with CPU_VCC through the 15 capacitor C 15, links to each other as the reset circuit of microprocessor 1 with power supply ground through the 18 resistance R 18.The 28th pin of microprocessor 1 links to each other as the working power of microprocessor 1 with CPU_VCC, the 16 capacitor C the 16, the 17 capacitor C 17 respectively.The 26th, 15 pins of microprocessor 1 are as the PWM output port of first ON-OFF control circuit 6 with second switch control circuit 7.The 1st pin of microprocessor 1 and the 32nd pin are as online burning program port, and the 17th, 20 pins of microprocessor 1 are as the input port of coil voltage/current detection circuit 8, and the 18th pin of microprocessor 1 is as the input port of control voltage detection module 3.JP2 is the online programming interface among the figure, is used for the online of microprocessor 1 and downloads and the online upgrading program.
As shown in Figure 5, first capacitor C 1 is parallel to the two ends of AC power input 14 in the switching power circuit 4 of the present utility model, the L end of AC power input 14 connects the 1st pin of an AC/DC module U1, the 1st pin of the 2nd AC/DC module U2 respectively, and the N end of AC power input 14 connects the 2nd pin of an AC/DC module U1, the 2nd AC/DC module U2 respectively.Second capacitor C 2, the 3rd C3 are parallel between the 4th pin and the 3rd pin of first via output of an AC/DC module U1, export first via working power VCC; The 4th capacitor C 4, the 5th capacitor C 5 are parallel between the 6th pin and the 5th pin of an AC/DC module U1 the second tunnel output, export the second tunnel working power VCC1; The 6th capacitor C 6, the 7th capacitor C 7 are parallel between the 3rd pin and the 4th pin of the 2nd AC/DC module U2 output, output Third Road 5V working power.Wherein an AC/DC module U1 model is XMA3.5-WD05P05M, and the 2nd AC/DC module U2 model is DBA2.5-S05W.Wherein first via VCC working power is mainly as the working power of module chips such as stand-by power supply control module 5, first ON-OFF control circuit 6, the second road VCC1 working power is mainly as the working power of coil voltage testing circuit 8, and Third Road 5V working power is mainly as the working power of coil current testing circuit 8.First via VCC working power in the switching power circuit 4 is 5 chargings of stand-by power supply control module simultaneously, and stand-by power supply control module 5 provides reliable working power for microprocessor 1, second switch control circuit 7, so that the reliable separating brake of the contactor after the outage.
As shown in Figure 6, stand-by power supply control module 5 of the present utility model, among the figure in the switching power circuit 4 first via working power VCC link to each other with the anode of germanium diode D6 by the 17 resistance R 17, the negative terminal of germanium diode D6 links to each other with positive pole, the connector JP1-4 pin of reserve battery BYDY1 respectively, and the negative pole of reserve battery BYDY1 links to each other with power supply ground.Connector Jp1-2, Jp1-3 pin link to each other with the working power CPU_VCC of microprocessor 1, and connector JP1-1 pin links to each other with first via working power VCC in the switching power circuit 4.Under the normal operating conditions, utilize short circuit spare that connector JP1-3, Jp1-4 pin are linked together.In order to realize that system is in the external power source outage back scheduled time, intelligent permanent magnet contactor still can work on to finish the transmission of separating brake instruction, the working power CPU_VCC of microprocessor 1 directly takes from the switching power circuit 4, but take among the reserve battery BYDY1, during switching power circuit 4 operate as normal the reserve battery BYDY1 charging in the stand-by power supply control module 5; When external ac power source input 14 outages, though switching power circuit 4 quits work immediately, but this moment, the operate as normal of microprocessor 1, second switch control circuit 7 was enough kept in reserve battery BYDY1 energy storage in required time, guaranteed the reliable separating brake of permanent magnet contactor.
As shown in Figure 7, first ON-OFF control circuit 6 of the present utility model, the input connector J1 that second switch control circuit 7 comprises to be connected with the input of alternating current 220V power supply, the input of AC power links to each other with the input of rectifier bridge D0 through fuse F1, and the 8th capacitor C 8, piezo-resistance RY1 are parallel to the input of rectifier bridge D0.Wherein the 8th capacitor C 8 is a filter capacitor, and RY1 is an overvoltage protection.The anode of rectifier bridge D0 output connects input connector J2-1 end through the first diode D1, the 9th capacitor C 9, the tenth capacitor C 10, first resistance R 1 link to each other with the negative terminal of the first diode D1 with the 11 capacitor C the 11, the 12 capacitor C 12, second resistance R, 2 series connection backs, one end respectively, and the other end links to each other with the output negative terminal of rectifier bridge D0.The negative terminal of the 9th capacitor C 9, the tenth capacitor C 10, an end of first resistance R 1 link to each other with the anode of the 11 capacitor C 11, the 12 capacitor C 12, an end of second resistance R 2 respectively.Wherein the 9th capacitor C 9, the tenth capacitor C the 10, the 11 capacitor C the 11, the 12 capacitor C 12 and first resistance R 1, second resistance R 2 are formed compound filter circuit, so that provide level and smooth direct voltage for coil.The 3rd resistance R 3, the 4th resistance R 4 series connection backs one end link to each other with connector J2-1 end, and the other end links to each other with the output negative terminal of rectifier bridge D0.Wherein connector J2 is the detection port that coil current detects.The first via working power VCC of switching power circuit 4 is respectively by the 5th resistance R 5, the 8th resistance R 8 respectively with the 5th optocoupler U5, the 1st pin of the 6th optocoupler U6 links to each other, the 5th optocoupler U5, the 2nd pin of the 6th optocoupler U6 connects the 26th pin of microprocessor 1, the 3rd DC/DC module U3, output the 4th pin of the 4th DC/DC module U4 meets the 5th optocoupler U5 respectively, the 4th pin of the 6th optocoupler U6, the 5th optocoupler U5, the 3rd pin of the 6th optocoupler U6 is respectively by the 6th resistance R 6, the 9th resistance R 9 respectively with the first power switch Q1, the grid of the 3rd power switch Q3 connects, simultaneously the 3rd pin of the 5th optocoupler U5 by the 7th resistance R 7 respectively with the source class of the first power switch Q1, the 3rd pin of the 3rd DC/DC module U3, coil connector J3-2 end, the drain electrode of the 4th power switch Q4 is connected, the 3rd pin of the 6th optocoupler U6 by the tenth resistance R 10 respectively with the source class of the 3rd power switch Q3, the 3rd pin of the 4th DC/DC module U4, the output negative terminal of rectifier bridge D0, the source electrode of the 4th power switch Q4, be connected together the power supply of the second tunnel working power VCC1.Wherein the first power switch Q1 and the 3rd power switch Q3 are respectively power device MOSFET.The 3rd DC/DC module U3 and the 4th DC/DC module U4 become+the DC/DC module of 12V for+5V.The first power switch Q1 and the 3rd power switch Q3 utilize optocoupler to realize it is driven, and provide between the 3rd and the 4th DC/DC module U3, the U4 output+12V grid source electrode for the first power switch Q1, the 3rd power switch Q3+conducting voltage of 12V.The 26th pin output low level when microprocessor 1, thereby make the 5th optocoupler U5 and the 6th optocoupler U6 conducting respectively, + 12V voltage is added to the grid source electrode two ends of the first power switch Q1, the 3rd power switch Q3, thereby first ON-OFF control circuit 6 drives the first power switch Q1 and the 3rd power switch Q3 conducting realizes that the forward of coil increases magnetic.Power supply CPU_VCC in the stand-by power supply control module 5 is respectively by the 11 resistance R 11, the 12 resistance R 12 respectively with the 9th optocoupler U9, the 1st pin of the tenth optocoupler U10 links to each other, the 9th optocoupler U9, the 2nd pin of the tenth optocoupler U10 connects the 15th pin of microprocessor 1, the 7th DC/DC module U7, output the 4th pin of the 8th DC/DC module U8 meets the 9th optocoupler U9 respectively, the 4th pin of the tenth optocoupler U10, the 9th optocoupler U9, the 3rd pin of the tenth optocoupler U10 is respectively by the 12 resistance R 12, the 15 resistance R 15 respectively with the second power switch Q2, the grid of the 4th power switch Q4 connects, the 3rd pin of the 9th optocoupler U9 by the 13 resistance R 13 respectively with the source class of the second power switch Q2, the 3rd pin of the 7th DC/DC module U7, coil connector J3-1 end, the drain electrode of the 3rd power switch Q3 is connected.The 3rd pin of the tenth optocoupler U10 is connected with the source class of the 4th power switch Q4, the 3rd pin of the 8th DC/DC module U8 respectively by the 16 resistance R 16.The drain electrode of the first power switch Q1, the second power switch Q2 and connector J2-2 end are connected together.Two inputs of the 3rd DC/DC module U3, the 4th DC/DC module U4 link to each other with first via working power VCC, GND in the switching power circuit 4 respectively, input the 1st pin of the 7th DC/DC module U7, the 8th DC/DC module U8 links to each other with the CPU_VCC in the stand-by power supply control module 5, and the 2nd pin of U7, U8 links to each other with GND.Wherein Q2 and Q4 are respectively power device MOSFET.The 7th DC/DC module U7 and the 8th DC/DC module U8 become+the DC/DC module of 12V for+5V.The second power switch Q2 and the 4th power switch Q4 utilize optocoupler to realize it is driven, and provide between the 7th DC/DC module U7, the grid source electrode of the 8th DC/DC module U8 output+12V for the second power switch Q2, the 4th power switch Q4+conducting voltage of 12V.The 15th pin output low level when microprocessor 1, thereby make the 9th optocoupler U9 and the tenth optocoupler U10 conducting, + 12V voltage is added to the grid source electrode two ends of the second power switch Q2, the 4th power switch Q4, thereby makes second switch control circuit 7 drive the oppositely weak magnetic of the second power switch Q2 and the 4th power switch Q4 conducting realization coil.Wherein the second diode D2, the 3rd diode D3, the inverse parallel of the 4th diode D4, the 5th diode D5 difference are used for Q1, the Q2 of power switch, the protection of Q3, Q4 between the drain electrode and source electrode of the first power switch Q1, the second power switch Q2, the 3rd power switch Q3, the 4th power switch Q4.
As shown in Figure 8, coil voltage/current detection circuit 8 of the present utility model is a core with linear optical coupling device HCNR200, and HCNR200 is made of a high-performance LED and two photodiode PD1 and PD2 with strict proportionate relationship.LED and PD1 form the importation that isolates change-over circuit and form negative feedback, and PD2 is then as the output of isolating change-over circuit.Both receive the light that LED sends by the back, thereby produce the output current that is directly proportional with luminous intensity at device output end, PD1 with the current feedback of generation to LED, so that input signal is carried out FEEDBACK CONTROL.This circuit by the 3rd precision resistance R3, the 4th precision resistance R4 to the coil voltage dividing potential drop after, enter the input port COIL_Vol of coil voltage testing circuit, link to each other with the first amplifier U1A by the 19 resistance R 19 one tunnel then, link to each other by the 1st pin of the 20 resistance R 20 with linear optical coupling device U12, the second tunnel working power VCC1 links to each other with the 2nd pin of linear optical coupling device U12; Another road links to each other with the 3rd pin of linear optical coupling device U12, and the 4th pin of linear optical coupling device U12 links to each other with the power supply ground of the second tunnel working power VCC1.Output the 5th, 6 pins of linear optical coupling device U12 link to each other with the 3rd, 2 pins of the second amplifier U2A respectively, the 11st pin of the second amplifier U2A links to each other with the power supply ground of first via working power VCC, the anode of 5V voltage-stabiliser tube D8 respectively, and voltage-stabiliser tube D8 negative terminal connects the 17th pin of microprocessor 1 after by the 22, the 20 capacitor C 20 filtering of the 22 resistance R.The connector input port J2-1 of coil current by the 23 resistance R 23 with input port J2-2, link to each other to Third Road 5V working power, the connector input port J2-1 of coil current is leaded up to the 24 resistance R 24 and is linked to each other with the 3rd amplifier U3A, link to each other by the 1st pin of the 25 resistance R 25 with linear optical coupling device U13, Third Road working power 5V links to each other with the 2nd pin of linear optical coupling device U13; Another road links to each other with the 3rd pin of linear optical coupling device U13, and the 4th pin of linear optical coupling device U13 links to each other with the power supply ground of Third Road working power 5V.Output the 5th, 6 pins of linear optical coupling device U13 link to each other with the 3rd, 2 pins of four high guaily unit U4A respectively, the 11st pin of four high guaily unit U4A links to each other with the power supply ground of first via working power VCC, the anode of 5V voltage-stabiliser tube D9 respectively, and the negative terminal of voltage-stabiliser tube D9 connects the 20th pin of microprocessor 1 after by the 27, the 23 capacitor C 23 filtering of the 27 resistance R.Wherein the first amplifier U1A and the 20 resistance R 20 and the 3rd amplifier U3A and the 25 resistance R 25 are used to regulate elementary amplifier input bias current I
FSize.Along with the increase of coil voltage and current signal, the reverse input end voltage of the first amplifier U1A, the 3rd amplifier U3A raises, and the output end voltage of the first amplifier U1A, the 3rd amplifier U3A reduction simultaneously will be tending towards 0V, and LED flows through electric current I
FIncrease, the irradiation that PD1 is subjected to LED makes electric current I
PD1Increase, thereby the reverse input end voltage of the first amplifier U1A, the 3rd amplifier U3A is retracted 0V again.At this moment, I
FNo longer increase, circuit forms stable negative feedback.21 feedback effects of the 18 capacitor C the 18, the 21 capacitor C, the burr signal in the filtering circuit avoids the LED of linear optical coupling device HCNR200 to be subjected to accidental shock simultaneously.The output end voltage of linear optical coupling device U12 and U13 protects with 5V voltage-stabiliser tube D8 and D9 respectively after the 22 resistance R the 22, the 20 capacitor C 20 and the 27 resistance R the 27, the 23 capacitor C 23 filter circuit filtering high-frequency voltage signals, sends into the 17th pin and the 20th pin of microprocessor 1 at last respectively.
As shown in Figure 9, the intelligent permanent magnet AC contactor program main flow chart of a kind of oppositely weak magnetic control system of the present utility model.Because there are four road programmable counter arrays (PCA) STC12C5612AD single-chip microcomputer inside, PCA contains 16 special bit timing devices, has four 16 catch/comparison modules to be attached thereto.Each module is able to programme to be operated under four kinds of patterns: but rising/trailing edge is caught, software timer, at a high speed output or modulating pulse output (being the PWM pattern).Utilization of the present invention is operated in module 0 (PWM0) under the PWM pattern and module 1 (PWM1) produces pwm control signal, and the gate pole of power switch MOSFET is triggered, and realizes the closing of permanent magnet contactor, sub-switching operation and oppositely weak magnetic control system.The PCA timer is benchmark common time of four PCA modules, and when being operated in PWM pattern following time, the PCA timer is split as two independently 8 bit timing devices, and special function register CL and CH are used for depositing the least-significant byte and the most-significant byte of PCA timer respectively.The output frequency of PWM depends on the clock source of PCA timer.PCA clock input source can be in following four kinds any one: overflow and the ECI/P3.4 of Fosc/12, Fosc/2, timer 0 import.The present invention selects overflowing as PCA clock source of timer 0.Because the PWM timer is 8, thus PWM cycle=256/ timer 0 overflow frequency.The initial value that timer 0 suitably is set just can obtain the PWM output in required cycle.Among the figure, x
2Be the moving total kilometres that move to closing position from the separating brake position unshakable in one's determination, PWM0, PWM1 are respectively the weak magnetic of permanent magnet contactor and increase magnetic PWM drive signal.The intelligent permanent magnet contactor workflow of the oppositely weak magnetic control system of position-sensor-free is: program begins to detect the external communication magnitude of voltage by control voltage detection module 3, if the voltage that detection obtains is in 70%～115% scope, then by the corresponding PWM control wave initialization PCA timer of microprocessor 1 output, each sampling period begins to detect simultaneously, voltage u and current i to coil are sampled, and calculate and set out displacement x unshakable in one's determination, select corresponding PWM1 duty ratio according to the size of x.When detecting displacement 0≤x≤x
1The time, microprocessor 1 is selected corresponding PWM1 duty ratio to drive first ON-OFF control circuit 6 and is made the first power switch Q1, the 3rd power switch Q3 conducting, makes permanent magnet contactor realize increasing magnetic; When detecting displacement x
1≤ x≤x
2The time, microprocessor 1 is selected corresponding PWM0 duty ratio to drive second switch control circuit 7 and is made the second power switch Q2, the 4th power switch Q4 conducting, makes permanent magnet contactor realize weak magnetic, when the value that detects displacement x arrives maximum x
2The time, turn-off closing circuit rapidly, make so strict coupling of electric transit time and mechanical action time, device for power switching conducting and fever time have been shortened greatly, prolonged the life-span of power device, and reduced first and second of contact to a great extent and bounced the electric and mechanical endurance of having improved permanent magnet contactor effectively.
Electric and the mechanical endurance that the number of times of contact first and second spring that produces in the Making Process of Permanent Magnet Contactor can intuitively reflect contactor, the number of times of contact first and second spring is many more, and electrical endurance is short more.In order to reflect the spring number of times of contact, two kinds of situations that the contactor that the present invention is directed to the E shape permanent magnet mechanism of KFC2-250A utilizes the oppositely weak magnetic control system strategy of this position-sensor-free and do not have an Intelligent Control Strategy have been carried out experimental verification.Contact bounce adopts and with the 5V direct voltage resistance is connected with probe of contactor in the experiment, obtains the situation of contact generation vibration in the making process by the variation of measuring resistance both end voltage.Figure 10 shows that two kinds of experimental waveforms under the control situation.As can be seen from the figure, be compared to Figure 10 (a) contactor under the oppositely weak magnetic control system strategy of the position-sensor-free shown in Figure 10 (b), make permanent magnet contactor reach good fit in the dynamic suction and the counter-force of making process, moving motion process unshakable in one's determination is tending towards slowing down, especially moving unshakable in one's determination the combined floodgate latter stage, because coil has been applied reverse current, reduced the moving moment end speed of closing a floodgate unshakable in one's determination to a great extent, realized that effectively moving soft landing unshakable in one's determination is in fixed core, reduced the collision energy of sound iron core, make contact one, two spring number of times obviously reduce, and have improved the electric and mechanical endurance of permanent magnet contactor.
Claims (6)
1. reverse intelligent permanent magnet AC contactor of weak magnetic control system, it is characterized in that this contactor is the center with microprocessor (1), the input of microprocessor (1) connects the output of control voltage detection module (3), stand-by power supply control module (5), coil voltage/current detection circuit (8) respectively, and the output of microprocessor (1) connects the input of first ON-OFF control circuit (6), second switch control circuit (7) respectively; AC power input (14) connects the input of current rectifying and wave filtering circuit (2), control voltage detection module (3), switching power circuit (4) respectively; The output one tunnel of current rectifying and wave filtering circuit (2) connects first power switch (9), coil (13), the 3rd power switch (11) successively, and another road connects second power switch (10), coil (13), the 4th power switch (12) successively; The input of coil (13) connecting coil voltage/current detection circuit (8); First ON-OFF control circuit (6) output connects the input of first power switch (9), the 3rd power switch (11) respectively, and second switch control circuit (7) output connects the input of second power switch (10), the 4th power switch (12) respectively; Switching power circuit (4) connects the input of stand-by power supply control module (5), and the output of stand-by power supply control module (5) connects the input of microprocessor (1), second switch control circuit (7) respectively.
2. the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system according to claim 1, it is characterized in that, described control voltage detection module (3) is a core with Hall voltage transducer VSM025A, an input L of AC power input (14) links to each other with the 1st pin of Hall voltage transducer (U14) by the 28 resistance (R28), and another input N links to each other with the 2nd pin of Hall voltage transducer (U14); The 3rd pin of DC/DC module (U15), the 5th pin link to each other with the 4th pin, the 5th pin of Hall voltage transducer (U14) respectively; The 29 resistance (R29) links to each other with the 3rd pin of Hall voltage transducer (U14), an end of the 30 resistance (R30) with the 7th voltage-stabiliser tube (D7) back in parallel one end, and the other end links to each other with the power supply ground of first via working power VCC, the 4th pin of DC/DC module (U15), an end of the 24 electric capacity (C24); The other end of the 30 resistance (R30) links to each other with the 18th pin of the other end of the 24 electric capacity (C24), microprocessor (1), and two inputs of DC/DC module (U15) link to each other with Third Road working power 5V, 0V in the switching power circuit (4) respectively.
3. the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system according to claim 1, it is characterized in that, first capacitor C 1 is parallel to the two ends of AC power input (14) in the described switching power circuit (4), the L end of AC power input (14) connects the 1st pin of an AC/DC module (U1), the 2nd AC/DC module (U2) respectively, and the N end of AC power input (14) connects the 2nd pin of an AC/DC module (U1), the 2nd AC/DC module (U2) respectively; Second electric capacity (C2), the 3rd electric capacity (C3) are parallel between the 4th pin and the 3rd pin of first via output of an AC/DC module (U1), export first via working power VCC; The 4th electric capacity (C4), the 5th electric capacity (C5) are parallel between the 6th pin and the 5th pin of an AC/DC module (U1) the second tunnel output, export the second tunnel working power VCC1; The 6th electric capacity (C6), the 7th electric capacity (C7) are parallel between the 3rd pin and the 4th pin of the 2nd AC/DC module (U2) output, output Third Road 5V working power, wherein calculating AC/DC module (U1) model is XMA3.5-WD05P05M, and the 2nd AC/DC module (U2) model is DBA2.5-S05W.
4. the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system according to claim 1, it is characterized in that, described first ON-OFF control circuit (6), second switch control circuit (7) comprise the input connector (J1) that is connected with the input of alternating current 220V power supply, the input of AC power links to each other with the input of rectifier bridge (D0) through fuse (F1), and the 8th electric capacity (C8), piezo-resistance (RY1) are parallel to the input of rectifier bridge (D0); The anode of rectifier bridge (D0) output connects the J2-1 end of electric current input connector through first diode (D1), the 9th electric capacity (C9), the tenth electric capacity (C10), first resistance (R1) link to each other with the negative terminal of first diode (D1) with the 11 electric capacity (C11), the 12 electric capacity (C12), second resistance (R2) series connection back, one end respectively, and the other end links to each other with the output negative terminal of rectifier bridge (D0); One end of the negative terminal of the 9th electric capacity (C9), the tenth electric capacity (C10), first resistance (R1) links to each other with the anode of the 11 electric capacity (C11), the 12 electric capacity (C12), an end of second resistance (R2) respectively; The 3rd resistance (R3), the 4th resistance (R4) series connection back one end link to each other with electric current input connector J2-1 end, and the other end links to each other with the output negative terminal of rectifier bridge (D0); The first via working power VCC of switching power circuit (4) is respectively by the 5th resistance (R5), the 8th resistance (R8) respectively with the 5th optocoupler (U5), the 1st pin of the 6th optocoupler (U6) links to each other, the 5th optocoupler (U5), the 2nd pin of the 6th optocoupler (U6) connects the 26th pin of microprocessor (1), the 3rd DC/DC module (U3), output the 4th pin of the 4th DC/DC module (U4) connects the 5th optocoupler (U5) respectively, the 4th pin of the 6th optocoupler (U6), the 5th optocoupler (U5), the 3rd pin of the 6th optocoupler (U6) is respectively by the 6th resistance (R6), the 9th resistance (R9) respectively with the first power switch Q1, the grid of the 3rd power switch Q3 connects, simultaneously the 3rd pin of the 5th optocoupler (U5) by the 7th resistance (R7) respectively with the source class of the first power switch Q1, the 3rd pin of the 3rd DC/DC module (U3), coil connector J3-2 end, the drain electrode of the 4th power switch Q4 is connected, the 3rd pin of the 6th optocoupler (U6) by the tenth resistance (R10) respectively with the source class of the 3rd power switch Q3, the 3rd pin of the 4th DC/DC module (U4), the output negative terminal of rectifier bridge (D0), the source electrode of the 4th power switch Q4, be connected together the power supply of the second tunnel working power VCC1; Power supply CPU_VCC in the stand-by power supply control module (5) is respectively by the 11 resistance (R11), the 12 resistance (R12) respectively with the 9th optocoupler (U9), the 1st pin of the tenth optocoupler (U10) links to each other, the 9th optocoupler (U9), the 2nd pin of the tenth optocoupler (U10) connects the 15th pin of microprocessor (1), the 7th DC/DC module (U7), output the 4th pin of the 8th DC/DC module (U8) connects the 9th optocoupler (U9) respectively, the 4th pin of the tenth optocoupler (U10), the 9th optocoupler (U9), the 3rd pin of the tenth optocoupler (U10) is respectively by the 12 resistance (R12), the 15 resistance (R15) respectively with the second power switch Q2, the grid of the 4th power switch Q4 connects, the 3rd pin of the 9th optocoupler (U9) by the 13 resistance (R13) respectively with the source class of the second power switch Q2, the 3rd pin of the 7th DC/DC module (U7), coil connector J3-1 end, the drain electrode of the 3rd power switch Q3 is connected; The 3rd pin of the tenth optocoupler (U10) is connected with the source class of the 4th power switch Q4, the 3rd pin of the 8th DC/DC module (U8) respectively by the 16 resistance (R16); The drain electrode of the first power switch Q1, the second power switch Q2 and connector J2-2 end are connected together; Two inputs of the 3rd DC/DC module (U3), the 4th DC/DC module (U4) link to each other with first via working power VCC, GND in the switching power circuit (4) respectively, input the 1st pin of the 7th DC/DC module (U7), the 8th DC/DC module (U8) links to each other with CPU_VCC in the stand-by power supply control module (5), and the 2nd pin of the 7th DC/DC module (U7), the 8th DC/DC module (U8) links to each other with GND; Second diode (D2), the 3rd diode (D3), the 4th diode (D4), the 5th diode (D5) are connected anti-parallel to respectively between the drain electrode and source electrode of power switch Q1, Q2, Q3, Q4, are used for the protection of power switch; Wherein the model of the 3rd DC/DC module (U3), the 4th DC/DC module (U4), the 7th DC/DC module (U7), the 8th DC/DC module (U8) is 14D-05S12NCNL, and the model of power switch Q1, Q2, Q3, Q4 is MOSFET-IRFP350.
5. the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system according to claim 1, it is characterized in that described first ON-OFF control circuit (6) drives the first power switch Q1 and the real-time conducting of the 3rd power switch Q3 realizes that the forward of coil in the making process increases magnetic; Second switch control circuit (7) drives the second power switch Q2 and the real-time conducting of the 4th power switch Q4, realizes the oppositely weak magnetic of coil in the making process.
6. the intelligent permanent magnet AC contactor of a kind of oppositely weak magnetic control system according to claim 1, it is characterized in that, described coil voltage/current detection circuit (8) is a core with linear optical coupling device HCNR200, by the 3rd resistance (R3), the 4th resistance (R4) to the coil voltage dividing potential drop after, enter the input port COIL_Vol of coil voltage testing circuit, link to each other with first amplifier (U1A) by the 19 resistance (R19) one tunnel then, link to each other by the 1st pin of the 20 resistance (R20) with linear optical coupling device (U12), the second tunnel working power VCC1 links to each other with the 2nd pin of linear optical coupling device (U12); Another road links to each other with the 3rd pin of linear optical coupling device (U12), and the 4th pin of linear optical coupling device (U12) links to each other with the power supply ground of the second tunnel working power VCC1; Output the 5th, 6 pins of linear optical coupling device (U12) link to each other with the 3rd, 2 pins of second amplifier (U2A) respectively, the 11st pin of second amplifier (U2A) links to each other with the power supply ground of first via working power VCC, the anode of 5V voltage-stabiliser tube (D8) respectively, and 5V voltage-stabiliser tube (D8) negative terminal connects the 17th pin of microprocessor (1) after by the 22 resistance (R22), the 20 electric capacity (C20) filtering; The connector input port J2-1 of coil current by the 23 resistance (R23) with input port J2-2, link to each other to Third Road 5V working power, the connector input port J2-1 of coil current is leaded up to the 24 resistance (R24) and is linked to each other with the 3rd amplifier (U3A), link to each other by the 1st pin of the 25 resistance (R25) with linear optical coupling device (U13), Third Road working power 5V links to each other with the 2nd pin of linear optical coupling device (U13); Another road links to each other with the 3rd pin of linear optical coupling device (U13), and the 4th pin of linear optical coupling device (U13) links to each other with the power supply ground of Third Road working power 5V; Output the 5th, 6 pins of linear optical coupling device (U13) link to each other with the 3rd, 2 pins of four high guaily unit (U4A) respectively, the 11st pin of four high guaily unit (U4A) links to each other with the power supply ground of first via working power VCC, the anode of 5V voltage-stabiliser tube (D9) respectively, and the negative terminal of 5V voltage-stabiliser tube (D9) connects the 20th pin of microprocessor (1) after by the 27 resistance (R27), the 23 electric capacity (C23) filtering.
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| CN201020191420XU CN201673862U (en) | 2010-05-14 | 2010-05-14 | Intelligent permanent magnetic alternating current contactor controlled by weak magnet |
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| CN201020191420XU CN201673862U (en) | 2010-05-14 | 2010-05-14 | Intelligent permanent magnetic alternating current contactor controlled by weak magnet |
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