CN101477919B - Intelligent control module for permanent magnet contactor - Google Patents
Intelligent control module for permanent magnet contactor Download PDFInfo
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- CN101477919B CN101477919B CN2009100283851A CN200910028385A CN101477919B CN 101477919 B CN101477919 B CN 101477919B CN 2009100283851 A CN2009100283851 A CN 2009100283851A CN 200910028385 A CN200910028385 A CN 200910028385A CN 101477919 B CN101477919 B CN 101477919B
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Abstract
The invention discloses an intelligent control module of a permanent magnet contactor, which mainly comprises a microprocessor, a rectifier and filter, an internal working power circuit, a rechargeable battery control circuit, a closing operation module, an opening operation module, an energy-storage capacitor voltage detection circuit, a control voltage detection circuit, a power off detection circuit, and a key-press setting and display control circuit; wherein, the closing operation module consists of a first MOSFET driving protection circuit and a first MOSFET; and the opening operation module consists of a second MOSFET driving protection circuit and a second MOSFET. The intelligent control module can set delay time parameters of transient interference electricity through key-presses according to requirements of a customer, realizes delay disconnection of the permanent magnet contactor and can ensure the stable and continuous operation of equipment through staying away from influences of interference electricity; and as for conditions of requiring urgent opening operation, the intelligent control module can immediately cut off the contactor through key-press control, so as to ensure the safety of the operating equipment.
Description
Technical field
The present invention relates to a kind of intelligent control module for permanent magnet contactor, realized the intellectuality control of permanent magnet contactor, belong to the intelligent electrical apparatus technical field.
Background technology
Permanent magnet contactor has been inherited all functions of traditional electromagnetic treadle, and have simple in structure, energy-conservation, noise is little, be subjected to voltage ripple of power network to influence little and coil such as is difficult for burning at advantage, for the development of high performance and energy-saving device for switching provides new evolutionary path.Thereby caused widely for the research of permanent magnet contactor and to have paid close attention to.
Existing permanent magnet contactor control circuit adopts analog control circuit to realize the many of divide-shut brake control.By retrieval, the patent No. is that the Chinese patent of 200510040937.2 patent " permanent magnet contactor and control device thereof " and the patent No. are the Chinese patent of 200520044326.0 patent " permanent magnet contactor control circuit ", and the patent No. is that the Chinese patent of 200710018279.6 patent " based on the permanent magnet mechanism controller of pulse modulation technology " all openly adopts analog control circuit to realize divide-shut brake control to permanent magnet contactor.Yet along with the development of modern electronic technology and Computer Control Technology, the contactor function of traditional analog control can not satisfy the requirement of distribution system automation, and people have proposed intelligentized requirement to low-voltage electrical apparatus.Low voltage electrical apparatus industry Eleventh Five-Year Plan development plan also clearly proposes low-voltage electrical apparatus will have highly intelligentized function.Therefore, studying intelligentized permanent magnet contactor, have great importance, also is the main developing direction of contactor.
In the actual use of permanent magnet contactor, because short circuit, main equipment start the influence with factor such as out of service, low-voltage or the outage (this phenomenon is called " rolling ") of moment can appear in supply voltage, at present the permanent magnet contactor of research is when the reliable adhesive greater than 85% time of control voltage, reliable separating brake when controlling voltage and be lower than 70%.Therefore when the rolling electricity takes place, contactor will discharge immediately, and major loop disconnects, and makes the equipment that is in the production out of service, the serialization large production equipment is had a strong impact on generation, the continuity production of enterprise is brought very big influence (especially petrochemical industry, iron and steel enterprise).Phenomenon at the rolling electricity, the patent No. is the Chinese patent of 200710014488.3 patent " a kind of permanent-magnetic AC contact of preventing the instantaneous interruption of voltage ", adopt capacitor discharge to realize that the contactor time-delay discharges in the analog control circuit, and the patent No. is the Chinese patent of 200810018875.9 patent " anti-dazzling-electric exterior adjustable delay time type permanent magnetism type A.C. contactor ", adopted two electric capacity parallel connections that Capacity Ratio is bigger in the analog control circuit, realized that the time-delay of contactor discharges.The circuit delay pattern is intended circuit characteristic and is set, alterability is poor, and different field demands need be changed different control circuits, also needs to change big electric capacity if increase delay time, cause volume to increase, delay time can't be adjusted in real time according to on-the-spot needs simultaneously.
Permanent magnet contactor works under the AC3 use classes, it requires the closed rated current that is equivalent to 6 times in motor starting electric current under rated voltage, and under 0.17Ue, disconnect rated current, thereby the electric life that works in contactor under the AC3 use classes depends on making process, and the interrupted arc that dynamic and static contact collision energy causes in the making process is to produce the main cause that contact corrodes and influence the contactor electric life.Permanent magnet contactor is in making process, overcoming the spring counter-force by electromagnetic attraction and the two-part active force of permanent magnetism suction makes contactor realize closing a floodgate, and it is very little at permanent magnet contactor combined floodgate initial stage permanent magnetism suction, at this moment the suction that needs bigger electromagnetic attraction and permanent magnet to produce drives the moving contact action, in the process of closing a floodgate, along with reducing of air gap, the suction increase that permanent magnet produces is very fast, and the suction that is produced by electromagnetic attraction and permanent magnet in the latter stage of closing a floodgate makes contactor realize closing a floodgate.Therefore, suction nargin is bigger in Making Process of Permanent Magnet Contactor, causes dynamic and static impact velocity unshakable in one's determination too fast, and collision energy is bigger in the making process, thereby makes dynamic and static contact produce the secondary spring, has had a strong impact on the electric life and the mechanical endurance of permanent magnet contactor.
Summary of the invention
Technical problem: the object of the present invention is to provide a kind of intelligent control module for permanent magnet contactor, adopt microminiaturized intelligent chip, realize the intellectuality control of permanent magnet contactor.This intelligent control module can make permanent magnet contactor reliably avoid the influence of rolling electricity, guarantees the steady and continuous operation of equipment.In delay time, running into the situation that needs urgent separating brake, by realizing that by key control contactor disconnects immediately, guarantee the safety of operational outfit.Employing pwm pulse control technology raising permanent magnet contactor works in electric life and the mechanical endurance under the AC3 use classes.Accurately control charging voltage on the storage capacitor by the storage capacitor voltage detecting circuit, improve charge efficiency, shorten the charging interval, guarantee that simultaneously the voltage on the storage capacitor is stable, press for the disjunction permanent magnet contactor provides galvanic current.
Technical scheme: for achieving the above object, intelligent control module for permanent magnet contactor of the present invention adopts following technical scheme:
Intelligent control module for permanent magnet contactor of the present invention, it is characterized in that this module is the center with the microprocessor, the input of microprocessor connects the output of rechargeable battery control circuit, storage capacitor voltage detecting circuit, control voltage detecting circuit, power failure detection circuit, button setting and display control circuit respectively, and the output of microprocessor engages the MOSFET Drive Protecting Circuit in the lock operational module, the 2nd MOSFET Drive Protecting Circuit in the sub-switching operation module respectively; The external ac power source input connects current rectifying and wave filtering circuit respectively; the internal work power circuit; the input of control voltage detecting circuit; the output of current rectifying and wave filtering circuit engages the MOSFET in the lock operational module; MOSFET in the closing operation module links to each other with coil; coil links to each other with storage capacitor; the output of internal work power circuit connects the rechargeable battery control circuit respectively; the storage capacitor voltage detecting circuit; the control voltage detecting circuit; power failure detection circuit; the input of the MOSFET Drive Protecting Circuit in button setting and display control circuit and the closing operation module; the input of output termination the 2nd MOSFET of the 2nd MOSFET Drive Protecting Circuit in the sub-switching operation module, the coil of the output termination outside of the 2nd MOSFET.
Intelligent control module for permanent magnet contactor of the present invention, described internal work power circuit comprises the 1st input connector J1 that is connected with the external ac power source input, the input L of AC power and the 1st fuse F1, the 1st thermistor RT1 links to each other, the 2nd piezo-resistance RV2 is parallel to the input of the 1st rectifier bridge D1, the 1st capacitor C 1, the 2nd capacitor C 2 and the 1st inductance L 1 are formed LC-∏ type filter circuit, be parallel to the output of the 1st rectifier bridge D1, after the 3rd capacitor C 3 and 2 parallel connections of the 2nd resistance R again with the out-primary that is parallel to the 1st transformer T1 after the 2nd backward diode D2 connects, the anode of the 2nd diode D2 links to each other with the 4th pin of the 1st chip U1, the 5th pin of the elementary winding of the 1st transformer T1 links to each other with the 4th pin of the 1st chip U1, the 1st pin of the 1st transformer T1, the end of capacitor C Y1 links to each other with the positive output end of the 1st rectifier bridge D1, the other end of capacitor C Y1 links to each other with ground, first secondary winding of the 1st transformer T1 by the 3rd diode D3 rectification after by entering the input of the 3rd chip U3 after 5 filtering of the 5th capacitor C, the output of the 3rd chip U3 is by the filtering output first via+5V power supply of the 6th capacitor C 6, second secondary winding of the 1st transformer T1 is by after the 4th diode D4 rectification, by the 7th capacitor C 7, the 2nd inductance L 2, after the filtering LC-∏ type filtering that the 8th capacitor C 8 is formed, again by output the second tunnel+5V power supply after 9 filtering of the 9th capacitor C, the negative electrode of the 4th diode D4 links to each other with the 1st pin of the 2nd optocoupler U2 by the 3rd resistance R 3 backs, link to each other with the 2nd pin of the 2nd optocoupler U2 by the 4th resistance R 4 backs simultaneously, the negative electrode of the 5th voltage-stabiliser tube D5 links to each other with the 2nd pin of the 2nd optocoupler U2, the anode of the 5th voltage-stabiliser tube D5 links to each other with ground, the 4th pin of the 2nd optocoupler U2 links to each other with the 1st pin of the 1st chip U1, the 3rd pin of the 2nd optocoupler U2 links to each other with the 2nd pin of the 1st chip U1 by the 4th capacitor C 4, the 3rd resistance R 3, the 4th resistance R 4, the 5th voltage-stabiliser tube D5 and the 2nd optocoupler U2 are used for detecting the 4th diode D4 output and feed back to the 1st chip U1, adjust the output voltage stabilization of the 4th diode D4.
Intelligent control module for permanent magnet contactor of the present invention, described rechargeable battery control circuit is made up of the rechargeable battery BT2 of the 11st charging resistor R11, the 6th germanium diode D6 and 5.5V, the second tunnel+5V power supply VCC links to each other with the anode of the 6th germanium diode D6 by the 11st charging resistor R11 in the internal work power circuit, the negative electrode of the 6th germanium diode D6 links to each other with the CPU_VCC of microprocessor the 28th pin by the positive pole of rechargeable battery BT2, and the negative pole of rechargeable battery BT2 links to each other with ground.
Intelligent control module for permanent magnet contactor of the present invention, described power failure detection circuit comprise with the internal work power circuit in the second tunnel+5V power supply VCC link to each other with the 2nd pin of comparator LM293, an end of the 8th resistance R 8 respectively by the 6th resistance R 6, the CPU_VCC of microprocessor the 28th pin links to each other with the 3rd pin of comparator LM293, an end of the 9th resistance R 9 respectively by the 7th resistance R 7, the other end of the other end of the 8th resistance R 8, the 9th resistance R 9, the 11st pin of comparator LM293 and be connected together.The CPU_VCC of microprocessor the 28th pin links to each other with the 4th pin of comparator LM293, and the CPU_VCC of microprocessor the 28th pin links to each other with the 1st pin, the microprocessor port DropTest of comparator LM293 respectively by the 10th resistance R 10 simultaneously.
Intelligent control module for permanent magnet contactor of the present invention, a MOSFET and the 11st diode D11 form buck circuit in the described closing operation module.
Intelligent control module for permanent magnet contactor of the present invention, the PWM control impuls of the MOSFET in the described closing operation module is provided by a MOSFET Drive Protecting Circuit, and a MOSFET and the 2nd MOSFET all adopt optocoupler to realize its driving.
Intelligent control module for permanent magnet contactor of the present invention, described control voltage detecting circuit is a core with the acquisition chip ATT7022A of microminiaturization, the external ac power source input is by 1 of the 1st resistance R 1 and the 2nd voltage transformer T2,2 two ends link to each other, the 19th resistance R 19 is parallel to the 3rd of the 2nd voltage transformer T2,4 pin two ends, the 3rd pin of the 2nd voltage transformer T2 links to each other with an end of the 20th resistance R 20, the other end of the 20th resistance R 20, one end of the 22nd resistance R 22, one end of the 16th capacitor C 16, the 3rd pin of the 5th chip U5 is connected together, the 4th pin of the 2nd voltage transformer T2 links to each other with an end of the 21st resistance R 21, the end of the other end of the 21st resistance R 21 by the 23rd resistance R 23 respectively with an end of the 17th capacitor C 17, the 4th pin of the 5th chip U5 links to each other, the other end of the 16th capacitor C 16, the other end of the 17th capacitor C 17 is connected with ground, the 22nd resistance R 22, the 23rd resistance R 23 links to each other with the 11st pin of the 5th chip U5, the 1st pin of the 5th chip U5 respectively with an end of the 20th capacitor C 20, one end of the 24th resistance R 24 links to each other, the other end of the 20th capacitor C 20 links to each other with ground, the other end of the 24th resistance R 24 links to each other with the second tunnel+5V power supply VCC in the internal work power circuit, the 21st capacitor C 21, the 22nd capacitor C 22 back one end side by side links to each other with the 5th pin of the 5th chip U5, the other end links to each other with ground, the 12nd pin of the 5th chip U5 and the 18th pin are respectively through the 28th capacitor C 28, the 29th capacitor C 29 links to each other with ground, and the other end links to each other with the second tunnel+5V power supply VCC in the internal work power circuit.The 26th capacitor C 26 links to each other with the 33rd pin of the 5th chip U5 with the 27th capacitor C 27 backs in parallel one end, the 26th capacitor C 26 links to each other with ground with the 27th capacitor C 27 back in parallel other ends, one end of the 25th capacitor C 25 respectively with the internal work power circuit in the second tunnel+5V power supply VCC, the 34th pin of the 5th chip U5 links to each other, the other end of the 25th capacitor C 25 links to each other with ground, the 35th pin of the 5th chip U5, the 36th pin, the 37th pin and the 38th pin respectively with the 27th pin of microprocessor, the 29th pin, the 30th pin, the 10th pin links to each other, the 41st pin of the 5th chip U5 links to each other with the second tunnel+5V power supply VCC in the internal work power circuit, the 42nd and 43 pins and the crystal oscillator Y2 of the 5th chip U5, the 18th capacitor C 18, the 19th capacitor C 19 links to each other, and wherein the 5th chip U5 is ATT7022A.
Intelligent control module for permanent magnet contactor of the present invention, described button setting and display control circuit are core with microminiaturized display control chip SM1623B, the 1st pin of the 13rd chip U13 links to each other with ground by the 34th resistance R 34, the 2nd pin of the 13rd chip U13, the 3rd pin, the 4th pin, the 5th pin respectively with the 10th pin of microprocessor, the 30th pin, the 29th pin, the 26th pin links to each other, the 10th pin of the 13rd chip U13, the 11st pin, the 12nd pin, the 14th pin, the 15th pin, the 16th pin, the 17th pin, 8 sections output of the 18th pin respectively with 1LED charactron DS1, two the 8 sections inputs of 2LED charactron DS2 connect, the 23rd pin of the 13rd chip U13, the 24th pin, the 27th pin, the 28th pin, the 30th pin, 6 positions output of the 31st pin respectively with 1LED charactron DS1, six position inputs of 2LED charactron DS2 connect, the 6th pin of the 35th resistance R 35 and the 13rd chip U13, button S1, S2, S3, the end of S4 links to each other, button S1, S2, S3, the other end of S4 respectively with the 10th pin of the 13rd chip U13, the 11st pin, the 12nd pin, the position input of the 14th pin and 2LED charactron DS2 links to each other, the 33rd capacitor C 33 1 ends link to each other with ground, the second tunnel+5V power supply VCC in the 33rd capacitor C 33 other ends and the internal work power circuit, the 9th pin of the 13rd chip U13 links to each other, the 34th capacitor C 34, the 35th capacitor C 35 backs in parallel one end links to each other with ground, the 34th capacitor C 34, the second tunnel+5V power supply VCC in the 35th capacitor C 35 back other ends in parallel and the internal work power circuit, the 25th pin of the 13rd chip U13 links to each other, the 26th pin of the 13rd chip U13, the 29th pin and the 32nd pin link to each other with ground, and wherein the 13rd chip U13 is SM1623B.
Intelligent control module for permanent magnet contactor of the present invention, described storage capacitor voltage detecting circuit is by precision resistance the 32nd resistance R 32, after the dividing potential drop of 33 couples the 32nd storage capacitor C32 of the 33rd resistance R, enter the input port CAP_Vol of storage capacitor voltage detecting circuit, this port CAP_Vol links to each other with emitter follower U5A, link to each other with the 6th sign-changing amplifier U6A by the 12nd resistance R 12, link to each other with the 7th sign-changing amplifier U7B by the 15th resistance R 15, by the 18th resistance R 18, link to each other with the 8th emitter follower U8B after the 15th capacitor C 15 links to each other, output connects the 16th pin AD0 port of microprocessor then.
Beneficial effect: intelligent control module for permanent magnet contactor of the present invention has been realized the intellectuality control of permanent magnet contactor by introducing microprocessor and adopting the rechargeable battery control circuit.Can by button the electric delay time parameter value of permanent magnet contactor moment rolling be set according to the curstomer`s site needs, when the rolling electricity takes place line voltage, avoid the electric influence that brings of rolling reliably, guarantee the continuous operation of production system.In delay time, when running into the situation that needs urgent separating brake, can be by realizing that by key control contactor disconnects immediately, to guarantee the safety of operational outfit.
Intelligent control module for permanent magnet contactor of the present invention, under the prerequisite that guarantees the reliable adhesive of permanent magnet contactor, by the PWM chopper control, pull characteristics cooperate with the reasonable of spring load characteristic in the control dynamic process, realize the combined floodgate control under the optimal motion characteristic, reduced the erosion of the spring of dynamic and static contact and interrupted arc, the electric life and the mechanical endurance of having improved permanent magnet contactor to contact.
Intelligent control module for permanent magnet contactor of the present invention, the charging voltage value according on the storage capacitor that is provided with by the charging voltage on the accurate control capacitance of storage capacitor voltage detecting circuit, has improved the switching frequency of charge efficiency and permanent magnet contactor.Adopted the storage capacitor voltage detecting circuit to detect the value of feedback of storage capacitor voltage in real time simultaneously and adjusted PWM control impuls duty ratio to keep storage capacitor voltage stable, guaranteed that permanent magnet contactor has the energy of reliable release.
Intelligent control module for permanent magnet contactor of the present invention, the switching voltage of permanent magnet contactor can be widened to 70%～115% rated voltage.
Intelligent control module for permanent magnet contactor of the present invention adopts microminiaturized intelligent chip by introducing microprocessor control system, has realized the intellectuality control of permanent magnet contactor.When permanent magnet contactor was in running order, when external ac power source outage, permanent magnet contactor needed separating brake, but since this moment the internal work power circuit quit work, microprocessor and sub-switching operation module do not have working power, contactor can't be realized separating brake.The present invention is by introducing the rechargeable battery control circuit, when power failure detection circuit detects external ac power source input outage, the rechargeable battery control circuit is devoted oneself to work, for microprocessor and sub-switching operation module provide reliable working power, to guarantee the reliable disconnection of permanent magnet contactor.Intelligent control module for permanent magnet contactor of the present invention can be according to client's needs, the delay time parameter of moment rolling electricity is set by button, work as voltage ripple of power network, and make external ac power source low-voltage or when outage of moment occur, can realize that the permanent magnet contactor time-delay disconnects, reliably avoid the influence of rolling electricity, guarantee the steady and continuous operation of equipment.In delay time, if run into emergency, need contactor separating brake immediately, can be by realizing that by key control contactor disconnects immediately, to guarantee the safety of operational outfit.Because permanent magnet contactor is in making process, suction nargin is bigger, adopt the pwm pulse control technology to make the pull characteristics of permanent magnet contactor and spring load characteristic reach rational cooperation among the present invention, make the adhesive impulsive force of dynamic and static iron core reduce to minimum, reduce the contact vibration, improved electric life and the mechanical endurance of permanent magnet contactor under the AC3 operation class (of an amplifying stage).Charge at electric capacity simultaneously, can charging voltage value on the storage capacitor be set by button, the charging voltage by on the accurate control capacitance of storage capacitor voltage detecting circuit has improved charge efficiency, shorten the charging interval, improved the switching frequency of permanent magnet contactor.Because there is the phenomenon of energy leakage in storage capacitor, voltage on the electric capacity reduces along with time lengthening, this control circuit detects storage capacitor voltage in real time by the storage capacitor voltage detecting circuit, adjust PWM control impuls duty ratio and keep the voltage on the storage capacitor stable, press for the disjunction permanent magnet contactor provides galvanic current.
Description of drawings
Fig. 1 is the circuit block diagram of described intelligent control module for permanent magnet contactor;
Fig. 2 is described internal work power circuit diagram;
Fig. 3 is described closing operation module and sub-switching operation module circuit diagram;
Fig. 4 is described microprocessor circuit figure;
Fig. 5 is described storage capacitor voltage detecting circuit figure;
Fig. 6 is described power failure detection circuit figure;
Fig. 7 is described rechargeable battery control circuit figure;
Fig. 8 is described control voltage detecting circuit figure;
Fig. 9 is described button setting and display control circuit figure;
Figure 10 (a) is the program main flow chart of described control unit; Figure 10 (b) is described low-voltage or outage subroutine flow chart;
Figure 11 (a) is the described contact bounce oscillogram under the PWM control impuls that do not adopt; Figure 11 (b) is a contact bounce oscillogram under the described employing pwm pulse;
The storage capacitor charging voltage oscillogram that Figure 12 is 185V and 220V for described storage capacitor charging voltage value of setting;
Figure 13 is described under moment rolling electric work energy, and the low-voltage delay time is the oscillogram of 3.8S;
Figure 14 is described under moment rolling electric work energy, and the outage delay time is the oscillogram of 3.8S.
Embodiment:
As shown in Figure 1, intelligent control module for permanent magnet contactor of the present invention mainly comprises microprocessor 1, current rectifying and wave filtering circuit 2, internal work power circuit 3, rechargeable battery control circuit 4, closing operation module 5, sub-switching operation module 6, storage capacitor voltage detecting circuit 7, control voltage detecting circuit 8, power failure detection circuit 9 and button setting and display control circuit 10.Wherein closing operation module 5 is made up of a MOSFET Drive Protecting Circuit 51 and a MOSFET52, and sub-switching operation module 6 is made up of the 2nd MOSFET Drive Protecting Circuit 61 and the 2nd MOSFET62.
External ac power source is imported 11 first via through internal work power circuit 3, and the working power of two-way+5V is provided for whole operating circuit.Wherein the first via+5V power supply is mainly as the working power of storage capacitor voltage detecting circuit 7, a MOSFET Drive Protecting Circuit 51, and the second tunnel+5V power supply is mainly as the working power of module chips such as rechargeable battery control circuit 4, button setting and display control circuit 10 and control voltage detecting circuit 8.The second tunnel+5V working power in the internal work power circuit 3 is 4 chargings of rechargeable battery control circuit simultaneously, and rechargeable battery control circuit 4 provides reliable working power for microprocessor 1, power failure detection circuit 9 and the 2nd MOSFET Drive Protecting Circuit 61.Simultaneously, it is the less direct voltage of the required ripple of buck circuit through current rectifying and wave filtering circuit 2 rectifying and wave-filterings that external ac power source imports 11 the second the tunnel, this direct voltage is added on adjustable DC voltage on the permanent magnet contactor coil 12 by the buck circuit that a MOSFET52 forms.
The intelligent control module for permanent magnet contactor operation principle is: before permanent magnet contactor is started working, set relevant parameters by button, be specially low-voltage delay time parameter, outage delay time parameter and storage capacitor charging voltage value, these parameters are kept in the storage chip by microprocessor 1, must could change by remodifying in case write, have the power down hold function simultaneously.When permanent magnet contactor need close a floodgate; control voltage detecting circuit 8 detects the external voltage value; if the voltage that detection obtains is in 70%～115% scope; then by the corresponding PWM control wave of microprocessor 1 output; this control impuls is by a MOSFET Drive Protecting Circuit 51 controls the one MOSFET52 conducting in the closing operation module 5; adjustable DC voltage is added on the contactor coil 12; contactor coil 12 has passed through the pulse current of forward, and the electromagnetic attraction of generation and the acting in conjunction of permanent magnetism suction make permanent magnet contactor realize combined floodgate.Accurate control by storage capacitor voltage detecting circuit 7 makes the voltage on the storage capacitor 13 be charged to set point, detect the feedback of the energy of storage capacitor 13 simultaneously by storage capacitor voltage detecting circuit 7 in real time, adjust the PWM control impuls and keep the voltage on the storage capacitor 13 stable.After contactor closes a floodgate, control voltage detecting circuit 8 detects external voltage signal in real time, be lower than 70% rated voltage when detected voltage, then according to the low-voltage delay time time-delay certain hour that sets, if recover normal at low-voltage delay time inside and outside voltage, then contactor still is in "on" position.Otherwise then microprocessor 1 stops output control pulse, and a MOSFET52 is disconnected.Microprocessor 1 output control command is controlled the 2nd MOSFET conducting 62 by the 2nd MOSFET Drive Protecting Circuit 61 in the sub-switching operation module 6 simultaneously, and contactor is realized separating brake.Equally, cut off the power supply when power failure detection circuit 9 detects external voltage, then according to behind the outage delay time time-delay certain hour that sets, if recover normally at outage delay time inside and outside voltage, then contactor still is in "on" position.Otherwise then microprocessor 1 output control command is controlled the 2nd MOSFET62 conducting by the 2nd MOSFET Drive Protecting Circuit 61 in the sub-switching operation module 6, and contactor is realized separating brake.Under permanent magnet contactor is in "on" position; can be by making permanent magnet contactor realize separating brake immediately at any time by key control in button setting and the display control circuit 10; guaranteed the disjunction immediately of the contactor under being in an emergency like this, the safety of protection operational outfit.
As shown in Figure 2; internal work power circuit 3 of the present invention comprises the 1st input connector J1 that is connected with the input of alternating current 220V power supply; the input L of AC power links to each other with the 1st fuse F1, the 1st thermistor RT1; the 2nd piezo-resistance RV2 is parallel to the input of the 1st rectifier bridge D1, and the 1st fuse F1, the 1st thermistor RT1, the 2nd piezo-resistance RV2 are used for the protection of power supply.The 1st capacitor C the 1, the 2nd capacitor C 2 and the 1st inductance L 1 are formed LC-∏ type filter circuit, are parallel to the output of the 1st rectifier bridge D1, make the DC voltage waveform of rectifier bridge output more level and smooth.After the 3rd capacitor C 3 and 2 parallel connections of the 2nd resistance R again with the elementary winding that is parallel to the 1st transformer T1 after the 2nd backward diode D2 connects, the 4th pin of the anode of the 2nd diode D2, the 1st chip U1 links to each other, the 3rd capacitor C the 3, the 2nd resistance R the 2, the 2nd diode D2 forms clamp circuit together, and the peak electricity electrification pointing peak of closing of the 4th pin D of the 1st chip U1 end is restricted to safe degree.The other end the 5th pin of the elementary winding of the 1st transformer T1 links to each other with the 4th pin of the 1st chip U1, drives by the MOSFET power switch among the 1st chip U1.The 1st pin of the 1st transformer T1 links to each other with the end of capacitor C Y1, the output anode of the 1st rectifier bridge D1 respectively.The other end of capacitor C Y1 links to each other with ground.First of the 1st transformer T1 secondary by after the 3rd diode D3 rectification by entering the input of the 3rd chip U3 and 7805 after 5 filtering of the 5th capacitor C, the 3rd chip U3 and 7805 output are by the filtering output first via+5V power supply of the 6th capacitor C 6, second of the 1st transformer T1 is secondary pass through the 4th diode D4 rectification after, after the filtering LC-∏ type filtering by the 7th capacitor C the 7, the 2nd inductance L the 2, the 8th capacitor C 8 compositions, again by output the second tunnel+5V power supply after 9 filtering of the 9th capacitor C.The negative terminal of the 4th diode D4 links to each other with the 1st pin of the 2nd optocoupler U2 by the 3rd resistance R 3 backs, links to each other with the 2nd pin of the 2nd optocoupler U2 by the 4th resistance R 4 backs simultaneously.The end of the 5th voltage-stabiliser tube D5 links to each other with the 2nd pin of the 2nd optocoupler U2, the other end of the 5th voltage-stabiliser tube D5 links to each other with ground, the 4th pin of the 2nd optocoupler U2 links to each other with the 1st pin of the 1st chip U1, and the 3rd pin of the 2nd optocoupler links to each other with the 2nd pin of the 1st chip U1 by the 4th capacitor C 4.The 3rd resistance R the 3, the 4th resistance R the 4, the 5th voltage-stabiliser tube D5 and the 2nd optocoupler U2 are used for detecting the 4th diode D4 output and feed back to the 1st chip U1, thereby adjust the output voltage stabilization that makes the 4th diode D4.The 1st chip U1 in the internal work power circuit 3 of the present invention adopts chip TNY274, and this internal work power circuit 3 produces two-way insulating power supply of 3.5W altogether, and the first via is+power supply of 5V/0.1A, the second tunnel is+power supply of 5V/0.6A.Wherein the first via+5V/0.1A power supply is mainly as the working power of storage capacitor voltage detecting circuit 7, a MOSFET Drive Protecting Circuit 51, and the second tunnel+5V/0.6A power supply is mainly as the working power of module chips such as rechargeable battery control circuit 4, button setting and display control circuit 10 and control voltage detecting circuit 8.The working power of the second tunnel+5V/0.6A wherein is 4 chargings of rechargeable battery control circuit simultaneously, and rechargeable battery control circuit 4 provides reliable working power for microprocessor 1, power failure detection circuit 9 and the 2nd MOSFET Drive Protecting Circuit 61.
As shown in Figure 3, closing operation module 5 of the present invention comprises the 2nd input connector J2 that is connected with the input of alternating current 220V power supply with sub-switching operation module 6 circuit, the 30th capacitor C 30 is parallel to power input with piezo-resistance RV1, power supply is through the 7th rectifier bridge D7, and the 31st capacitor C 31 is parallel to the 7th rectifier bridge D7 output two ends.Wherein the 30th capacitor C the 30, the 31st capacitor C 31 is a filter capacitor, and RV1 is an overvoltage protection.The drain electrode of the positive termination Q3 of the 7th rectifier bridge D7 output; the 8th diode D8 inverse parallel is between the drain electrode and source electrode of Q3; be used for the protection of Q3; the first via of internal work power circuit 3+5V output links to each other with the 1st pin of the 11st optocoupler U11 by the 27th resistance R 27; the 2nd pin of the 11st optocoupler U11 connects the 13rd pin of microprocessor 1; output the 4th pin of DC/DC module U9 connects the 4th pin of the 11st optocoupler U11; the 3rd pin of the 11st optocoupler U11 is connected with the grid of Q3 by the 25th resistance R 25; simultaneously the 3rd pin of the 11st optocoupler U11 by the 26th resistance R 26 respectively with the source class of Q3; the 3rd pin of DC/DC module U9 is connected with the anode of the 9th diode D9; the negative terminal of the 9th diode D9 and the 31st resistance R 31; the 1st pin of the end of the 11st diode D11 and the 3rd connector J3 is connected together; the pin of CPU_VCC in the rechargeable battery control circuit 4 links to each other with the 1st pin of the 12nd optocoupler U12 by the 28th resistance R 28; the 2nd pin of the 12nd optocoupler U12 is connected with the 14th pin of microprocessor 1; output the 4th pin of DC/DC module U10 connects the 4th pin of optocoupler U12; the 3rd pin of DC/DC module U10 by the 29th resistance R 29 respectively with the negative terminal of the 7th rectifier bridge D7 output; the 3rd pin of DC/DC module U10 is connected; the 3rd pin of DC/DC module U10 links to each other with the grid of Q4 by the 30th resistance R 30 simultaneously; the drain electrode of Q4 links to each other with the other end of the 31st resistance R 31; the 10th diode D10 inverse parallel is in the Q4 two ends; be used for protection to Q4; the source electrode of Q4 respectively with the anode of the 11st diode D11; the negative terminal of storage capacitor 13C32; the negative pole of output end of the 7th rectifier bridge D7 is connected; the 2nd pin of the anode of storage capacitor 13C32 and the 3rd connector J3 links; in parallel with storage capacitor 13C32 after the 32nd resistance R 32 is connected with the 33rd resistance R 33, the CAP_Vol among the figure is connected with the input port of storage capacitor voltage detecting circuit 7.Two inputs of DC/DC module U9 link to each other with the first via+5V, 0V in the internal work power circuit 3 respectively, and input the 1st pin of DC/DC module U10 links to each other with the CPU_VCC in the rechargeable battery control circuit 4, and the 2nd pin of U10 links to each other with GND.Wherein Q3 and Q4 are respectively a MOSFET52 and the 2nd MOSFET62.U9 and U10 become+the DC/DC module of 12V for+5V.The one MOSFET52 and the 2nd MOSFET62 utilize optocoupler to realize it is driven, and provide between the grid source electrode of DC/DC module U9 output+12V for a MOSFET52 and Q3+conducting voltage of 12V.When the 13rd pin output low level of microprocessor 1, thereby make the optocoupler conducting ,+12V voltage is added to the grid source electrode two ends of Q3, drives the MOSFET52 conducting in the closing operation module 5.Provide between the grid source electrode of DC/DC module U10 output+12V for the 2nd MOSFET62 and Q3+conducting voltage of 12V, the 14th pin output low level when microprocessor 1, thereby make the optocoupler conducting, + 12V voltage is added to the grid source electrode two ends of Q4, drives the 2nd MOSFET62 conducting in the sub-switching operation module 6.
As shown in Figure 4, microprocessor 1 of the present invention is the core of whole intelligent control module, carries out corresponding operation by the signal, the signal of power failure detection circuit 9, the signal of storage capacitor voltage detecting circuit 7 and the signal of button setting and display control circuit 10 that receive control voltage detecting 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 STC12C5410AD.The single-chip microcomputer of this model has high speed, low-power consumption, miniaturization and superpower jamproof characteristics, fast 8～12 times than common single-chip microcomputer speed.This single-chip microcomputer internal resource is abundant, and 8 tunnel 10 A/D conversions are at a high speed arranged, and 6 16 bit timing device/counters are arranged, and ISP is in the system programmable function, EEPROM function and built-in watchdog function, and the PWM control impuls is provided by the single-chip microcomputer timer internal.The 3rd of single-chip microcomputer the links to each other with crystal oscillator Y1, the 11st capacitor C the 11, the 12nd capacitor C 12 respectively with 4 pins among the figure, as the clock circuit of single-chip microcomputer.The 31st pin of single-chip microcomputer links to each other as the reset circuit of single-chip microcomputer with CPU_VCC, the 5th resistance R the 5, the 10th capacitor C 10 respectively.The 28th pin of single-chip microcomputer links to each other as the working power of single-chip microcomputer with CPU_VCC, the 13rd capacitor C the 13, the 14th capacitor C 14 respectively.One-chip machine port SPI_DOUT, SPI_DIN, be the read/write channel between single-chip microcomputer and the chip ATT7022A, SPI_SCL and ATT7022_CS port are clock signal and the chip selection signal of chip ATT7022A.One-chip machine port SPI_DOUT, SPI_DIN, be the read/write channel between single-chip microcomputer and the chip SM1623B, SPI_SCL and SM1623_CS are clock signal and the chip selection signal of chip SM1623B.The 1st pin of single-chip microcomputer and the 32nd pin are as online burning program port, the 7th pin of single-chip microcomputer is as the port of power failure detection circuit 9, the 13rd pin and the 14th pin of single-chip microcomputer drive port as optocoupler, and the 16th pin of single-chip microcomputer is as the input port of storage capacitor voltage detecting circuit 7.JP1 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, storage capacitor voltage detecting circuit 7 of the present invention is used for the detection to storage capacitor 13 voltages, make the voltage on the storage capacitor 13 be charged to set point by the 7 accurate controls of storage capacitor voltage detecting circuit, adjust pwm pulse by the storage capacitor voltage detecting circuit 7 real-time feedbacks that detect the energy of storage capacitor 13 by microprocessor 1 simultaneously and keep the voltage on the storage capacitor 13 stable, for the disjunction permanent magnet contactor provides the galvanic current pressure.Storage capacitor 13 enters the input port of storage capacitor voltage detecting circuit 7 by after 33 pairs of capacitance voltage dividing potential drops of precision resistance the 32nd resistance R the 32, the 33rd resistance R, is adjusted into the voltage signal of 0～5V then through the sqignal conditioning circuit.The input port CAP_Vol of storage capacitor voltage detecting circuit links to each other with emitter follower U5A, link to each other with sign-changing amplifier U6A by the 12nd resistance R 12, link to each other with the 7th sign-changing amplifier U7B by the 15th resistance R 15, link to each other with the 8th emitter follower U8B by the 18th resistance R the 18, the 15th capacitor C 15 continuous backs, output connects the 16th pin AD0 port of microprocessor 1 then.Emitter follower can improve input impedance, increases the load capacity of sampling end.The 18th resistance R the 18, the 15th capacitor C 15 constitutes the low pass filter filters out high order harmonic component.
As shown in Figure 6, power failure detection circuit 9 of the present invention comprise the second tunnel+5V power supply VCC in the internal work power circuit 3 by the 6th resistance R 6 respectively with the 2nd pin of comparator LM293, one end of the 8th resistance R 8 links to each other, CPU_VCC among the figure by the 7th resistance R 7 respectively with the 3rd pin of comparator LM293, one end of the 9th resistance R 9 links to each other, the other end of the 8th resistance R 8, the other end of the 9th resistance R 9, the 11st pin of comparator LM293 be connected together, CPU_VCC among the figure links to each other with the 4th pin of comparator LM293, simultaneously CPU_VCC by the 10th resistance R 10 respectively with the 1st pin of comparator LM293, microprocessor 1 port DropTest links to each other.Power failure detection circuit 9 is used to detect the powering-off state of external ac power source input 11 and internal work power circuit 3, when microprocessor 1 detects the 7th pin and is high level, then enters the outage subprogram.
As shown in Figure 7, rechargeable battery control circuit 4 of the present invention, VCC links to each other with the anode of the 6th germanium diode D6 by the 11st resistance R 11 among the figure, and the negative terminal of the 6th germanium tube D6 links to each other with positive pole, the CPU_VCC of the 2nd battery BT2 respectively, and the negative pole of battery links to each other with ground.When external ac power source input 11 outages, internal work power circuit 3 quits work, and this moment, rechargeable battery control circuit 4 provided reliable working power for microprocessor 1, power failure detection circuit 9 and sub-switching operation module 6, guaranteed the reliably working of permanent magnet contactor.
As shown in Figure 8, control voltage detecting circuit 8 of the present invention, external ac power source input 11 is by 1 of the 1st resistance R 1 and the 2nd voltage transformer T2 among the figure, 2 two ends link to each other, the 19th resistance R 19 is parallel to the 3rd of voltage transformer T2,4 pin two ends, the 3rd pin of the 2nd voltage transformer T2 links to each other with an end of the 20th resistance R 20, the other end of the 20th resistance R 20, one end of the 22nd resistance R 22, one end of the 16th capacitor C 16 and the 3rd pin of chip ATT7022A are connected together, the 4th pin of the 2nd voltage transformer T2 links to each other with an end of the 21st resistance R 21, the other end of the 21st resistance R 21 respectively with an end of the 23rd resistance R 23, one end of the 17th capacitor C 17, the 4th pin of chip ATT7022A links to each other, the other end of the 16th capacitor C 16, the other end of the 17th capacitor C 17 is connected with ground, the 22nd resistance R 22 respectively with the 23rd resistance R 23, the 11st pin of chip ATT7022A links to each other.The 1st pin of chip ATT7022A links to each other with an end of the 20th capacitor C 20, an end of the 24th resistance R 24 respectively, the other end of the 20th capacitor C 20 links to each other with ground, the other end of the 24th resistance R 24 links to each other with VCC, and VCC, the 20th capacitor C 20 and the 24th resistance R 24 constitute the reset circuit of chip ATT7022A.The 21st capacitor C the 21, the 22nd capacitor C 22 backs in parallel one end links to each other with the 5th pin of chip ATT7022A, and the other end links to each other with ground.The 12nd pin of chip ATT7022A links to each other with ground through the 28th capacitor C the 28, the 29th capacitor C 29 respectively with the 18th pin, and the other end links to each other with VCC.The 26th capacitor C 26 links to each other with the 33rd pin of chip ATT7022A with the 27th capacitor C 27 backs in parallel one end, and the other end links to each other with ground.One end of the 25th capacitor C 25 links to each other with the 34th pin of VCC, chip ATT7022A respectively, and the other end of the 25th capacitor C 25 links to each other with ground.The 35th pin of chip ATT7022A, the 36th pin, the 37th pin and the 38th pin link to each other with the 27th pin, the 29th pin, the 30th pin, the 10th pin of microprocessor 1 among Fig. 4 respectively, be used for and chip ATT7022A between sheet choosing, clock and read/write channel.The 41st pin of chip ATT7022A links to each other with VCC, for chip provides working power.The 42nd of chip ATT7022A links to each other with crystal oscillator Y2, the 18th capacitor C the 18, the 19th capacitor C 19 with 43 pins, as the clock circuit of chip operation.Use chip ATT7022A in the control voltage detecting circuit 8 among the present invention, it is a high accuracy, the microminiaturized special-purpose computation chip of three-phase electric energy, inner integrated 16 ADC of 6 passages and high performance 24 bit DSPs.This chip provides SPI interface, and the data passes between convenience and the outside MCU can read the voltage and current effective value by the special-purpose register mode area of SPI in sheet.The function of control voltage detecting circuit 8 is to detect the external voltage situation of change, and detected value is delivered to the port of microprocessor 1, sends the divide-shut brake that corresponding control wave is controlled permanent magnet contactor by microprocessor 1.
As shown in Figure 9, adopted chip SM1623B in button setting of the present invention and the display control circuit 10, its circuit such as MCU digital interface, data latches, LED high drive, keyboard scan that have been a kind of with keyboard scan interface, microminiaturized LED drive controlling special circuit, inner integrated.Built-in serial line interface convenience and the data passes between the outside MCU.Chip internal has electrostatic protection and anti-jamming circuit, so anti-static ability and anti-power supply interference performance are stronger.The 1st pin of figure chips SM1623B links to each other with ground by the 34th resistance R 34, and the operating frequency of chip is provided.The 2nd pin of chip SM1623B, the 3rd pin, the 4th pin, the 5th pin link to each other with the 10th pin, the 30th pin, the 29th pin, the 26th pin of microprocessor 1 respectively, be used for and chip SM1623B between data passes.8 section outputs of the 10th pin of chip SM1623B, the 11st pin, the 12nd pin, the 14th pin, the 15th pin, the 16th pin, the 17th pin, the 18th pin are connected with two the 8 sections inputs of LED charactron DS1, DS2 respectively.6 position outputs of the 23rd pin of chip SM1623B, the 24th pin, the 27th pin, the 28th pin, the 30th pin, the 31st pin are connected with six position inputs of LED charactron DS1, DS2 respectively.The 35th resistance R 35 links to each other with the end of the 6th pin of chip SM1623B, button S1, S2, S3, S4 respectively, and the other end of button S1, S2, S3, S4 links to each other with the position input of the 10th pin, the 11st pin, the 12nd pin, the 14th pin and the LED charactron DS2 of chip SM1623B respectively.The 33rd capacitor C 33 1 ends link to each other with ground, the other end links to each other with the 9th pin of VCC, chip SM1623B respectively, the 34th capacitor C the 34, the 35th capacitor C 35 backs in parallel one end links to each other with ground, the 34th capacitor C the 34, the 35th capacitor C 35 back in parallel other ends link to each other with the 25th pin of VCC, chip SM1623B respectively, and SM1623B provides working power for chip.The 26th pin of chip SM1623B, the 29th pin and the 32nd pin link to each other with ground respectively.The button demonstration shows and setting with the parameter that control circuit 10 is used for low-voltage delay time, outage delay time and storage capacitor charging voltage value, simultaneously when being in an emergency, can realize separating brake immediately by make permanent magnet contactor by key control, guarantee the safety of operational outfit.The menu of its button S1, S2, S3, S4 is as shown in table 1.Low-voltage delay time, outage delay time and storage capacitor charging voltage value that parameter area is set is as shown in table 2.
Table 1 keypress function table
Table 2 is provided with parameter list
| Title | Unit | Parameter area |
| The low-voltage time-delay | S | 0～5 |
| The outage time-delay | S | 0～5 |
| The storage capacitor charging voltage value | V | 0～320 |
As shown in figure 10, the program main flow chart of the control unit of intelligent control module for permanent magnet contactor of the present invention and low-voltage or outage subroutine flow chart are as Figure 10 (a), shown in 10 (b).After permanent magnet contactor powers on; Single Chip Microcomputer (SCM) system detects control voltage earlier; if the voltage that detection obtains is in 70%～115% scope; then by the corresponding PWM control wave of microprocessor 1 output; this control impuls is by a MOSFET Drive Protecting Circuit 51 controls the one MOSFET52 conducting in the closing operation module 5; adjustable DC voltage is added on the contactor coil 12; contactor coil 12 has passed through the pulse current of forward, and the electromagnetic attraction of generation and the acting in conjunction of permanent magnetism suction make permanent magnet contactor realize combined floodgate.Accurately controlling by storage capacitor voltage detecting circuit 7 simultaneously makes the voltage on the storage capacitor 13 be charged to set point, utilize storage capacitor voltage detecting circuit 7 to detect the value of feedback of the energy of storage capacitor 13 in real time, adjust the PWM control impuls and keep the voltage on the storage capacitor 13 stable.After permanent magnet contactor closes a floodgate, control voltage detecting circuit 8 detects external voltage signal in real time, when detected voltage is lower than 70% rated voltage or external voltage outage, then according to low-voltage delay time parameter that sets or outage delay time parameter time-delay certain hour, if in the low-voltage delay time or outage delay time inside and outside voltage recover normal, then contactor still is in "on" position.Otherwise then microprocessor 1 sends control command, and by the 2nd MOSFET Drive Protecting Circuit 61 controls the 2nd MOSFET62 conducting in the sub-switching operation module 6, contactor is realized separating brake.When permanent magnet contactor is in the time-delay state, can guarantee the disjunction immediately of the contactor under being in an emergency like this by making permanent magnet contactor realize separating brake immediately at any time, the safety of protection operational outfit by key control.
The permanent magnet contactor that the present invention is directed to the circular mechanism of KFC2-140A utilizes this intelligent control module for permanent magnet contactor to carry out experimental verification.Experiment measuring permanent magnet contactor be in 70%～115% scope at control voltage, the reliable adhesive of contactor, when not setting the electric delay time parameter of rolling, permanent magnet contactor is reliably to disconnect in 10%～60% scope at control voltage.
The contact bounce of contactor is the key reason that influences the permanent magnet contactor electric life in the making process, and spring duration in making process between dynamic and static contact and spring number of times are few more, electric life and the mechanical endurance that can effectively improve permanent magnet contactor.Experiment measuring adopt the contact bounce waveform under the PWM control impuls condition in this intelligent control module for permanent magnet contactor and do not adopt contact bounce waveform under the PWM control impuls condition.From not adopting under the PWM control impuls condition of Figure 11 (a), the spring duration of contact is 3.6mS as can be seen, and the spring number of times of contact is 4 times, adopts under the PWM control impuls from Figure 11 (b), the spring duration of contact is 0.8mS as can be seen, and the spring number of times of contact is 1 time.Therefore, the intelligent control module for permanent magnet contactor of employing PWM control impuls effectively raises the working life under the AC3 classification of permanent magnet contactor.
Accurately control charging voltage on the storage capacitor by the storage capacitor voltage detecting circuit, improved charge efficiency, shortened the charging interval, improved the switching frequency of permanent magnet contactor.The stored energy of storage capacitor reduces along with time lengthening, this intelligent control module detects the feedback of the energy of storage capacitor in real time by the storage capacitor voltage detecting circuit, adjust the PWM control impuls and keep the voltage on the storage capacitor stable, press for the disjunction permanent magnet contactor provides galvanic current.Experiment measuring the charging voltage value on the storage capacitor, when the beginning of experiment, earlier the parameter area according to table 2 sets the storage capacitor charging voltage value by button.Shown in Figure 12 (a) and Figure 12 (b), the charging voltage waveform on the storage capacitor when set point 185V and 220V.
Because when the low-voltage of moment or outage appearred in the fluctuation of line voltage, external ac power source, this intelligent control module for permanent magnet contactor had the characteristic of anti-rolling electricity.Experiment measuring taking place under the fluctuation situation of line voltage, the anti-rolling electrical characteristics of contactor are provided with low-voltage delay time parameter and outage delay time parameter by button, have realized that the permanent magnet contactor time-delay disconnects, reliably avoid the influence of rolling electricity, guarantee the steady and continuous operation of equipment.When the beginning of experiment, the parameter area according to table 2 sets rolling electrical parameter values and low-voltage delay time parameter and outage delay time parameter by button earlier.Figure 13 is the oscillogram of 3.8S for low-voltage delay time parameter, when detecting external voltage, the control voltage detecting circuit is lower than 70% rated voltage, if recover normal at the low-voltage delay time 3.8S inside and outside voltage that sets, then contactor still is in "on" position.Shown in Figure 13 (a).Otherwise then microprocessor sends control impuls, controls the 2nd MOSFET conducting by the 2nd MOSFET Drive Protecting Circuit in the sub-switching operation module, and contactor is realized separating brake.Shown in Figure 13 (b).Figure 14 is the oscillogram of 3.8S for outage delay time parameter, when power failure detection circuit detects the external voltage outage, if in the outage delay time 3.8S inside and outside voltage recovery that sets normally, then contactor still is in "on" position, shown in Figure 14 (a).Otherwise then microprocessor sends control impuls, controls the 2nd MOSFET conducting by the 2nd MOSFET Drive Protecting Circuit in the sub-switching operation module, and contactor is realized separating brake, shown in Figure 14 (b).
Simultaneously, experiment measuring when contactor is in the delay working state, by by key control, can realize the disconnection immediately of contactor at any time, effectively guaranteed the disjunction immediately of the contactor under being in an emergency, thereby protected the safety of operational outfit.
Claims (7)
1. intelligent control module for permanent magnet contactor, it is characterized in that this module is the center with microprocessor (1), the input of microprocessor (1) connects the output of rechargeable battery control circuit (4), storage capacitor voltage detecting circuit (7), control voltage detecting circuit (8), power failure detection circuit (9), button setting and display control circuit (10) respectively, and the output of microprocessor (1) engages the MOSFET Drive Protecting Circuit (51) in the lock operational module (5), the 2nd MOSFET Drive Protecting Circuit (61) in the sub-switching operation module (6) respectively;
External ac power source input (11) connects the input of current rectifying and wave filtering circuit (2), internal work power circuit (3), control voltage detecting circuit (8) respectively;
The output of current rectifying and wave filtering circuit (2) engages the MOSFET (52) in the lock operational module (5);
The output of internal work power circuit (3) connects the input of the MOSFET Drive Protecting Circuit (51) in rechargeable battery control circuit (4), storage capacitor voltage detecting circuit (7), control voltage detecting circuit (8), power failure detection circuit (9), button setting and display control circuit (10) and the closing operation module (5) respectively;
The input of output termination the 2nd MOSFET (62) of the 2nd MOSFET Drive Protecting Circuit (61) in sub-switching operation module (6),
The output of the output of a described MOSFET (52), the 2nd MOSFET (62) is connected with the input of permanent magnet contactor coil (12) respectively, and the output of described permanent magnet contactor coil (12) is connected with storage capacitor (13);
Described microprocessor (1) adopts the STC12 series monolithic, and its model is STC12C5410AD.
2. intelligent control module for permanent magnet contactor according to claim 1, it is characterized in that, described rechargeable battery control circuit (4) is made up of the rechargeable battery of the 11st charging resistor, the 6th germanium diode and 5.5V, the second tunnel+5V power supply in the internal work power circuit (3) links to each other with the anode of the 6th germanium diode by the 11st charging resistor, the negative electrode of the 6th germanium diode links to each other with the CPU_VCC of microprocessor (1) the 28th pin by the positive pole of rechargeable battery, and the negative pole of described rechargeable battery links to each other with ground.
3. according to the described intelligent control module for permanent magnet contactor of claim 1, it is characterized in that, described power failure detection circuit (9) comprising: the second tunnel+5V power supply in the internal work power circuit (3) links to each other with the 2nd pin of comparator LM293, an end of the 8th resistance respectively by the 6th resistance, the CPU_VCC of microprocessor (1) the 28th pin links to each other with the 3rd pin of comparator LM293, an end of the 9th resistance respectively by the 7th resistance, the other end of the other end of the 8th resistance, the 9th resistance, the 11st pin of comparator LM293 and be connected together; The CPU_VCC of microprocessor (1) the 28th pin links to each other with the 4th pin of comparator LM293, and the CPU_VCC of microprocessor (1) the 28th pin links to each other with the 1st pin, microprocessor (1) the port DropTest of described comparator LM293 respectively by the 10th resistance simultaneously.
4. according to the described intelligent control module for permanent magnet contactor of claim 1, it is characterized in that a MOSFET (52) and the 11st diode are formed buck circuit in the described closing operation module (5).
5. according to claim 1 or 4 described intelligent control module for permanent magnet contactor; it is characterized in that; the PWM control impuls of a MOSFET (52) in the described closing operation module (5) is provided by a MOSFET Drive Protecting Circuit (51), and a MOSFET (52) and the 2nd MOSFET (62) all adopt optocoupler to realize its driving.
6. according to the described intelligent control module for permanent magnet contactor of claim 1, it is characterized in that described button setting and display control circuit (10) are core with the 13rd chip, wherein the 13rd chip is microminiaturized display control chip SM1623B;
The 1st pin of the 13rd chip links to each other with ground by the 34th resistance,
The 2nd pin of the 13rd chip, the 3rd pin, the 4th pin, the 5th pin link to each other with the 10th pin, the 30th pin, the 29th pin, the 26th pin of microprocessor (1) respectively,
8 section outputs of the 10th pin of the 13rd chip, the 11st pin, the 12nd pin, the 14th pin, the 15th pin, the 16th pin, the 17th pin, the 18th pin are connected with two 8 sections inputs of 1LED charactron, 2LED charactron respectively,
6 position outputs of the 23rd pin of the 13rd chip, the 24th pin, the 27th pin, the 28th pin, the 30th pin, the 31st pin are connected with six position inputs of 1LED charactron, 2LED charactron respectively,
The end of the 6th pin of the 35th resistance and the 13rd chip, button S1, S2, S3, S4 links to each other,
The other end of button S1, S2, S3, S4 links to each other with the position input of the 10th pin, the 11st pin, the 12nd pin, the 14th pin and the 2LED charactron of the 13rd chip respectively,
The 33rd electric capacity one end links to each other with ground, and the second tunnel+5V power supply in the 33rd electric capacity other end and the internal work power circuit (3), the 9th pin of the 13rd chip link to each other,
An end links to each other with ground after the 34th electric capacity, the 35th electric capacity parallel connection, after the 34th electric capacity, the 35th electric capacity parallel connection in the other end and the internal work power circuit (3) the 25th pin of the second tunnel+5V power supply, the 13rd chip link to each other, the 26th pin of the 13rd chip, the 29th pin and the 32nd pin link to each other with ground.
7. according to the described intelligent control module for permanent magnet contactor of claim 1, it is characterized in that, described storage capacitor voltage detecting circuit (7) is by the 32nd resistance, after the dividing potential drop of the 33rd resistance to the 32nd storage capacitor, enter the input port of storage capacitor voltage detecting circuit (7), described input port is with after emitter follower links to each other, link to each other with the 6th sign-changing amplifier by the 12nd resistance again, and then link to each other with the 7th sign-changing amplifier by the 15th resistance, and then by the 18th resistance, the 15th electric capacity links to each other with the 8th emitter follower after linking to each other, and output connects the 16th pin AD0 port of microprocessor (1) then; Described the 32nd resistance, the 33rd resistance are precision resistances.
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| CN2009100283851A CN101477919B (en) | 2009-01-23 | 2009-01-23 | Intelligent control module for permanent magnet contactor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100283851A CN101477919B (en) | 2009-01-23 | 2009-01-23 | Intelligent control module for permanent magnet contactor |
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| CN101477919A CN101477919A (en) | 2009-07-08 |
| CN101477919B true CN101477919B (en) | 2011-06-08 |
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| CN111613481B (en) * | 2020-05-28 | 2022-07-22 | 浙江炬诺电器股份有限公司 | Anti-interference electricity intelligent controller based on double energy storage capacitors |
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