CN103247475B - Constant-magnetic maintaining AC contactor control circuit and control method thereof - Google Patents
Constant-magnetic maintaining AC contactor control circuit and control method thereof Download PDFInfo
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- CN103247475B CN103247475B CN201310177422.1A CN201310177422A CN103247475B CN 103247475 B CN103247475 B CN 103247475B CN 201310177422 A CN201310177422 A CN 201310177422A CN 103247475 B CN103247475 B CN 103247475B
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Abstract
The invention discloses a constant-magnetic maintaining AC contactor control circuit and a control method thereof. The control circuit comprises a power source and detection module, a control and driver module and an execution module, wherein a three-wire system is adopted at the periphery of the control circuit; the control circuit is connected to a normally-opened start switch and a normally-closed stop switch externally; the control and driver module comprises a micro control unit (MCU), a first drive circuit, a second drive circuit, a relay coil J1 and a relay coil J2; and the execution module comprises an inductor L1, a rectifier bridge BD1, a capacitor C1, a capacitor C2, a diode D1, a diode D2, five contact terminals of the relay coil J1, five contact terminals of the relay coil J2 and a contactor coil. The control circuit provided by the invention is simple in structure, low in cost, small in work energy consumption, convenient for installation, high in safety, strong in reliability and quick in reaction speed.
Description
Technical field
The present invention relates to a kind of constant-magnet remaining AC contactor, be specifically related to a kind of that control based on Micro-processor MCV, energy-saving constant-magnet remaining AC contactor control circuit and control method thereof, belong to electrical engineering field.
Background technology
A.C. contactor be in electric equipment output large, use one of wide major electrical equipment product, its major control is to liking the various power consumption equipments such as motor, transformer, illumination, resistance furnace, and its application relates to industry, agricultural, communications and transportation, business, people's lives and all sectors of the national economy.Constant-magnet remaining AC contactor is structurally with the maximum difference of traditional electrical magnetic mechanism: the maintenance function that after adhesive, coil can realize attracted position without the need to being energized, tool reliability is high, and energy-saving effect is remarkable.At present, about the design of permanent magnetic structure and control circuit, structure is comparatively complicated, and there is arcing short circuit phenomenon, needs to improve its performance further.
Chinese patent 200820216240.5 discloses a kind of constant-magnet remaining AC contactor.When providing forward current for coil, contactor adhesive, and after electric current disconnects, keep attracting state by permanent magnetic force; Utilize storage capacitor to discharge for coil provides reverse current, overcome permanent magnetic force and disconnect contactor.There is following defect in its control circuit: (1) circuit structure is complicated, and particularly accumulator part components and parts are more, improve cost; (2) in the contactor course of work, control relay works all the time, and therefore circuit energy consumption is still higher.
Chinese patent 201210287412.9 discloses the control circuit after a kind of improvement, and this circuit structure is simple, components and parts are few, and after contactor adhesive, control relay is no longer energized, and reduces energy consumption.But this control circuit adopts Stroke Key, installation is comparatively complicated and closed rear disconnection of travel switch button has phenomenon of arc discharge, easily causes both positive and negative polarity arcing short circuit.In addition, in dispose procedure when the coil is energized between long time, contactor adhesive again can be caused.
Summary of the invention
The present invention be overcome the complex structure of above-mentioned existing control circuit, energy consumption is high, the discharge and recharge burst length is longer, reliability is not high, reaction speed is slow, cannot the thorough problem such as arc extinguishing, provide that a kind of structure is simple, cost is low, operating power consumption is little, easy for installation, security performance is high, reliability is strong, reaction speed is fast, based on the intelligent energy-saving control circuit of Micro-processor MCV.Another object of the present invention is to provide the control method of this control circuit.
The technical scheme that control circuit of the present invention adopts is as follows:
A kind of constant-magnet remaining AC contactor control circuit, be made up of power supply and detection module, control and driver module, Executive Module, the periphery of control circuit adopts three-wire system, and an external starting switch often opened and a normally closed shutdown switch, shutdown switch one end is held with the L of 220V alternating current and is connected, one end is connected with power supply and detection module with one end of starting switch simultaneously in addition, and other one end of described starting switch is connected with power supply and detection module, wherein, control and driver module are by Micro-processor MCV, first drive circuit, second drive circuit, relay J 1 coil and relay J 2 coil composition, the I/O mouth P0 of Micro-processor MCV is connected with one end of the first drive circuit, the other end of the first drive circuit is connected with one end of relay J 1 coil, other one end of relay J 1 is connected with the ground end in the first drive circuit, the I/O mouth P1 of Micro-processor MCV is connected with one end of the second drive circuit, the other end of the second drive circuit is connected with one end of relay J 2 coil, other one end of relay J 2 is connected with the ground end in the second drive circuit, by five contacts of inductance L 1, rectifier bridge BD1, electric capacity C1, electric capacity C2, diode D1, diode D2, relay J 1 coil, (wherein conversion hysteria contact part J1A is 1,2,3 terminals to Executive Module, and when relay coil no power, 1 end is connected with 2 ends, when relay coil is energized, is converted to 1 end and is connected with 3 terminals, dynamic circuit connector type contact part J1B is 4,5 terminals, and disconnect when relay coil no power, adhesive during relay coil energising), (wherein conversion hysteria contact part J2A is 1,2,3 terminals for five contacts of relay J 2 coil, and when relay coil no power, 1 end is connected with 3 ends, when relay coil is energized, is converted to 1 end and is connected with 2 terminals, dynamic circuit connector type contact part J2B is 4, 5 terminals, and disconnect when relay coil no power, adhesive during relay coil energising) and contactor coil composition, one end of inductance L 1 is connected with the L level of 220V alternating current, the other end is connected with wherein one end of rectifier bridge BD1 ac input end, an other ac input end of rectifier bridge BD1 is connected with the N level of 220V alternating current, the direct current output plus terminal of rectifier bridge BD1 is connected with one end of electric capacity C1 and 3 ends of conversion hysteria contact part J1A with relay J 1, 2 ends of the conversion hysteria contact part J2A of relay J 2 are connected, 1 end of the conversion hysteria contact part J1A of relay J 1 and the negative electrode of diode D1 and one end of ac contactor coil, one end of electric capacity C2 is connected, the other end of A.C. contactor and the negative electrode of diode D2, 1 end of another grade of electric capacity C2 and the conversion hysteria contact part J2A of relay J 2 is connected, 5 ends of the other end of diode D1 and the dynamic circuit connector type contact part J1B of relay J 1 and being connected with 3 ends of the conversion hysteria contact part J2A of relay J 2, 5 ends of the another terminal of diode D2 and the dynamic circuit connector type contact part J2B of relay J 2 and being connected with 2 ends of the conversion hysteria contact part J1A of relay J 1, 4 ends of 4 ends of the dynamic circuit connector type contact part J1B of relay J 1 and the dynamic circuit connector type contact part J2B of relay J 2, the other end of electric capacity C1 and the direct current of rectifier bridge BD1 export negative terminal and are connected.
Control method of the present invention is as follows: connect 220V AC power, and when pressing starting switch, level upset occurs the input signal KG of the P2 mouth of Micro-processor MCV, becomes low level from high level; When pressing shutdown switch, there is level upset in the input signal ST of the P3 mouth of Micro-processor MCV, becomes low level from high level; When input signal KG is high level, Micro-processor MCV non-output signal; When input signal KG is low level, the P0 mouth of Micro-processor MCV output signal is low level, makes the conducting of relay J 1 coil, relay J 2 coil obstructed by the first drive circuit, the second drive circuit; When input signal ST is high level, Micro-processor MCV non-output signal; When input signal ST is low level, the output signal of the P1 mouth of Micro-processor MCV is low level, now makes the conducting of relay J 2 coil, relay J 1 coil obstructed by the first drive circuit, the second drive circuit; When relay J 1 coil, the equal no current of relay J 2 coil pass through, contactor coil does not have electric current to flow through, and now contactor is in off-state; When relay J 1 coil electricity, relay J 2 coil no power, the contact 1 of relay J 1 coil is connected with 3, the contact 4 of relay J 1 coil is connected with 5 simultaneously, the contact 1 of relay J 2 coil is connected with 3, the contact 4 and 5 of relay J 2 coil disconnects, and at this moment contactor coil has forward current to flow through, thus makes contactor adhesive, after adhesive under the effect of magnet, two iron cores remain attracting state; When relay J 2 coil electricity, relay J 1 coil no power, the contact 1 of relay J 1 coil is connected with 2, the contact 4 and 5 of relay J 1 coil disconnects, the contact 1 of relay J 2 coil is connected with 2, the contact 4 of relay J 2 coil is connected with 5 simultaneously, at this moment contactor coil reverses current through, thus contactor flicks.
The beneficial effect that the present invention has is:
1, circuit structure is simple, components and parts are few, and cost is low, and coil is almost without temperature rise, and energy consumption is low, noiselessness;
2, adopt decompression capacitor to replace traditional transformer, volume is little, saves the space of instrument and meter greatly, has saved cost;
3, adopt relay to substitute Stroke Key, simplify mounting process and by the pair of terminal design mix breakpoint of relay, protect circuit, thoroughly avoid causing both positive and negative polarity arcing short circuit, security performance is greatly improved;
4, carry out control coil energising with Micro-processor MCV, improve the reaction speed of contactor adhesive, release, avoid the long heavily adhesive phenomenon caused conduction time, improve the precision of system, achieve precision and control;
5, contactor adopts three-wire system, and peripheral circuit directly connects control switch key, can directly replace original contactor, easy for installation.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of contactor of the present invention.
Fig. 2 is the operating circuit schematic diagram of contactor of the present invention.
Embodiment
Energy-saving constant-magnet remaining AC contactor control circuit (Fig. 1) of the present invention by power supply and detection module 101, to control and driver module 102, Executive Module 103 form, peripheral employing three-wire system, an external starting switch SW1 and often opened a normally closed shutdown switch SW2.Power supply and detection module 101 produce the galvanic current needed for circuit; When pressing starting switch SW1, there is level upset in the input signal KG of the P2 mouth of Micro-processor MCV, becomes low level from high level; When pressing shutdown switch SW2, there is level upset in the input signal ST of the P3 mouth of Micro-processor MCV, becomes low level from high level.When input signal KG is high level, Micro-processor MCV non-output signal, when input signal KG is low level, the P0 mouth output low level of Micro-processor MCV, makes the conducting of relay J 1 coil, relay J 2 coil obstructed by drive circuit 201, drive circuit 202, when input signal ST is high level, Micro-processor MCV non-output signal, when input signal ST is low level, the P1 mouth output low level of Micro-processor MCV, makes the conducting of relay J 2 coil, relay J 1 coil obstructed by drive circuit 201, drive circuit 202, when relay J 1 coil, the equal no current of relay J 2 coil pass through, contactor coil 301 does not have electric current to flow through, and now contactor is in the state of flicking, when relay J 1 coil electricity, during relay J 2 coil no power, 1 of the conversion hysteria contact part J1A of relay J 1, 3 contacts be connected simultaneously relay J 1 dynamic circuit connector type contact part J1B 4, 5 contacts are connected, 1 of the conversion hysteria contact part J2A of relay J 2, 3 contacts are connected, 4 of the dynamic circuit connector type contact part J2B of relay J 2, 5 contacts disconnect, so 220V AC power, inductance L 1, rectifier bridge BD1, 1 of relay J 1 coil, 3 contacts and 4, 5 contacts, contactor coil 301, 1 of relay J 2 coil, 3 contacts, just loop is defined, contactor coil 301 is made to have forward current to flow through, thus contactor adhesive, in the effect of magnet after adhesive, two iron cores remain attracting state, when relay J 2 coil electricity, during relay J 1 coil no power relay J 1 conversion hysteria contact part J1A 1, 2 contacts are connected, 4 of the dynamic circuit connector type contact part J1B of relay J 1, 5 contacts disconnect, 1 of the conversion hysteria contact part J2A of relay J 2, 2 contacts are connected, simultaneously relay J 2 dynamic circuit connector type contact part J2B 4, 5 contacts are connected, so electric capacity C1, electric capacity C2, inductance L 1, rectifier bridge BD1, 1 of relay J 2, 2 contacts and 4, 5 contacts, contactor coil 301, 1 of relay J 1, 2 contacts, just loop is defined, contactor coil 301 is reversed current through, thus contactor flicks.
Relay J 1 coil, relay J 2 coil be connected by 1,2 contacts be converted to 1,3 contacts be connected or be connected by 1,3 contacts be converted to 1,2 contacts be connected process in, likely electric arc can be produced, in the present invention, utilize 1,2 contacts of electric capacity C2, diode D1 or D2 and relay J 1 or 1,3 contact composition loops of relay J 2, eliminate this electric arc, and because 4,5 contacts of relay J 1 coil, relay J 2 coil disconnect when relay no power, avoid the appearance of arcing short-circuit conditions.
In contactor dispose procedure, if contactor coil is long for conduction time, contactor adhesive again likely can be caused.In the present invention, utilize the conduction time of the strict control contactor coil of Micro-processor MCV, avoid the risk of contactor adhesive again, improve the reliability of system.
Its course of work is as follows:
1, contactor attracting process: connect 220V AC power, press start key SW1, there is level upset in the input signal KG of Micro-processor MCV input P2, low level is become from high level, after Micro-processor MCV detects the level change of input P2, in output P0 output low level, output P1 exports high level, by drive circuit 201, 202 make relay J 1 coil electricity, relay J 2 coil no power, after relay J 1 coil electricity, it is 1 years old, 2 contacts change disconnection into by adhesive, it is 1 years old, 3 contacts by disconnection change into adhesive simultaneously its 4, 5 contacts change adhesive into by disconnection, relay J 2 coil no power, still keep its 1, 2 contact adhesives 1, 3 contacts and 4, 5 contacts all disconnect.Such alternating current defines a loop through 1,3 terminals of inductance L 1, rectifier bridge BD1, relay J 1 coil and contactor coil 301,1,3 terminals of relay J 2 coil, 4,5 terminals of relay J 1 coil, contactor coil 301 is made to have forward current to flow through, thus contactor adhesive.
2, contactor dispose procedure: press stop key SW2, there is level upset in the input signal ST of Micro-processor MCV input P3, low level is become from high level, after Micro-processor MCV detects the level change of input P3, high level is exported at output P0, output P1 output low level, by drive circuit 201, 202 make relay J 1 coil blackout, relay J 2 coil electricity, after relay J 1 coil blackout, it is 1 years old, 2 contacts change adhesive into by disconnection, it is 1 years old, 3 contacts by adhesive change into disconnect simultaneously its 4, 5 contacts change disconnection into by adhesive, after relay J 2 coil electricity, it is 1 years old, 2 contacts change disconnection into by adhesive, it is 1 years old, 3 contacts by disconnection change into adhesive simultaneously its 4, 5 contacts change adhesive into by disconnection.1,2 terminals of such electric capacity C1, electric capacity C2, relay J 2 coil and the coil 301 of contactor, 1,2 terminals of relay J 1 coil, 4,5 terminals of relay J 2 coil define a loop, make contactor coil 301 have reverse current to flow through, thus contactor is flicked.
Claims (2)
1. a constant-magnet remaining AC contactor control circuit, be made up of power supply and detection module, control and driver module, Executive Module, it is characterized in that, the periphery of control circuit adopts three-wire system, and an external starting switch often opened and a normally closed shutdown switch, shutdown switch one end is held with the L of 220V alternating current and is connected, and one end is connected with power supply and detection module with one end of starting switch simultaneously in addition, and other one end of described starting switch is connected with power supply and detection module, wherein, control and driver module are by Micro-processor MCV, first drive circuit, second drive circuit, relay J 1 coil and relay J 2 coil composition, the I/O mouth P0 of Micro-processor MCV is connected with one end of the first drive circuit, the other end of the first drive circuit is connected with one end of relay J 1 coil, other one end of relay J 1 coil is connected with the ground end in the first drive circuit, the I/O mouth P1 of Micro-processor MCV is connected with one end of the second drive circuit, the other end of the second drive circuit is connected with one end of relay J 2 coil, other one end of relay J 2 coil is connected with the ground end in the second drive circuit, Executive Module is by inductance L 1, rectifier bridge BD1, electric capacity C1, electric capacity C2, diode D1, diode D2, the contact of relay J 1 coil, the contact of relay J 2 coil and contactor coil composition, the contact of described relay J 1 coil comprises 1 terminal of conversion hysteria contact part J1A, 2 terminals, 4 terminals of 3 terminals and dynamic circuit connector type contact part J1B, 5 terminals, the contact of described relay J 2 coil comprises 1 terminal of conversion hysteria contact part J2A, 2 terminals, 4 terminals of 3 terminals and dynamic circuit connector type contact part J2B, 5 terminals, one end of described inductance L 1 is held with the L of 220V alternating current and is connected, the other end is connected with wherein one end of rectifier bridge BD1 ac input end, an other ac input end of rectifier bridge BD1 is held with the N of 220V alternating current and is connected, the direct current output plus terminal of described rectifier bridge BD1 be connected with one end of electric capacity C1 and with 3 terminals of conversion hysteria contact part J1A, 2 terminals of conversion hysteria contact part J2A are connected, 1 terminal of conversion hysteria contact part J1A and the negative electrode of diode D1 and one end of contactor coil, one end of electric capacity C2 is connected, the other end of described contactor coil and the negative electrode of diode D2, the other end of electric capacity C2 and 1 terminal of conversion hysteria contact part J2A are connected, the anode of described diode D1 is with 5 terminals of dynamic circuit connector type contact part J1B and be connected with 3 terminals of conversion hysteria contact part J2A, the anode of described diode D2 is with 5 terminals of dynamic circuit connector type contact part J2B and be connected with 2 terminals of conversion hysteria contact part J1A, 4 terminals of dynamic circuit connector type contact part J1B and 4 terminals of dynamic circuit connector type contact part J2B, the other end of electric capacity C1 and the direct current of rectifier bridge BD1 export negative terminal and are connected.
2. the control method of a kind of constant-magnet remaining AC contactor control circuit as claimed in claim 1, specific as follows:
Connect 220V AC power, when pressing starting switch, there is level upset in the input signal KG of the P2 mouth of Micro-processor MCV, becomes low level from high level; When pressing shutdown switch, there is level upset in the input signal ST of the P3 mouth of Micro-processor MCV, becomes low level from high level;
When input signal KG is high level, Micro-processor MCV non-output signal; When input signal KG is low level, the P0 mouth of Micro-processor MCV output signal is low level, makes the conducting of relay J 1 coil, relay J 2 coil obstructed by the first drive circuit, the second drive circuit;
When input signal ST is high level, Micro-processor MCV non-output signal; When input signal ST is low level, the output signal of the P1 mouth of Micro-processor MCV is low level, now makes the conducting of relay J 2 coil, relay J 1 coil obstructed by the first drive circuit, the second drive circuit;
When relay J 1 coil, the equal no current of relay J 2 coil pass through, contactor coil does not have electric current to flow through, and now contactor is in off-state; When relay J 1 coil electricity, relay J 2 coil no power, 1 terminal, 3 terminals of the conversion hysteria contact part J1A of relay J 1 coil are connected, simultaneously 4 terminals of the dynamic circuit connector type contact part J1B of relay J 1 coil, 5 terminals are connected, 1 terminal, 3 terminals of the conversion hysteria contact part J2A of relay J 2 are connected, simultaneously 4 terminals of the dynamic circuit connector type contact part J2B of relay J 2 coil, 5 terminals disconnect, now contactor coil has forward current to flow through, thus make contactor adhesive, after adhesive under the effect of magnet, two iron cores remain attracting state;
When relay J 2 coil electricity, relay J 1 coil no power, 1 terminal, 2 terminals of the conversion hysteria contact part J1A of relay J 1 coil are connected, simultaneously 4 terminals of the dynamic circuit connector type contact part J1B of relay J 1 coil, 5 terminals disconnect, 1 terminal, 3 terminals of the conversion hysteria contact part J2A of relay J 2 coil are connected, simultaneously 4 terminals of the dynamic circuit connector type contact part J2B of relay J 2 coil, 5 terminals are connected, now contactor coil reverses current through, thus contactor flicks.
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| CN201310177422.1A CN103247475B (en) | 2013-05-15 | 2013-05-15 | Constant-magnetic maintaining AC contactor control circuit and control method thereof |
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| CN201310177422.1A CN103247475B (en) | 2013-05-15 | 2013-05-15 | Constant-magnetic maintaining AC contactor control circuit and control method thereof |
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| CN103247475B true CN103247475B (en) | 2015-03-04 |
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| CN105192144A (en) * | 2015-10-21 | 2015-12-30 | 华南农业大学 | Oolong roller type fine manipulation machine full automatic control system and method |
| CN107064440A (en) * | 2017-05-05 | 2017-08-18 | 内蒙古塞飞亚农业科技发展股份有限公司 | Free skating dynamic formula candler |
| CN108735552B (en) * | 2018-08-17 | 2024-01-16 | 广州金升阳科技有限公司 | Coil control circuit of contactor |
| CN113410908B (en) * | 2021-06-18 | 2022-07-26 | 卡斯柯信号有限公司 | Driving interface system of single-coil relay supporting master and standby driving |
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| JP2007200817A (en) * | 2006-01-30 | 2007-08-09 | Furukawa Electric Co Ltd:The | Switching device for power supply |
| CN201673862U (en) * | 2010-05-14 | 2010-12-15 | 东南大学 | Intelligent permanent magnetic alternating current contactor controlled by weak magnet |
| US20120002332A1 (en) * | 2010-06-30 | 2012-01-05 | Riley Joseph D | Overvoltage circuit, and motor starter, overload relay and low-power system including the same |
| CN202633175U (en) * | 2012-06-25 | 2012-12-26 | 福州大学 | Voltage sagging prevention wide voltage alternating current contactor controller based on low voltage capacitance |
| CN203250689U (en) * | 2013-05-15 | 2013-10-23 | 江苏大学 | Constant magnetic-holding alternating-current contactor control circuit |
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