CN2634635Y - DC operated three phase AC contactor intelligent control module - Google Patents

DC operated three phase AC contactor intelligent control module Download PDF

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Publication number
CN2634635Y
CN2634635Y CN 03268568 CN03268568U CN2634635Y CN 2634635 Y CN2634635 Y CN 2634635Y CN 03268568 CN03268568 CN 03268568 CN 03268568 U CN03268568 U CN 03268568U CN 2634635 Y CN2634635 Y CN 2634635Y
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contactor
diode
microprocessor
triode
circuit
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CN 03268568
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Chinese (zh)
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王稳忠
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Abstract

The utility model is an intelligent control module for three-phase AC contactor of direct current operation, comprising a module solidification shell educing end of lines, and an inner electric circuit solidified in the shell which comprises a three-phase bridge rectifier circuit with a public-exposed structure that is composed of diodes and a current-limit and step-down rectifier circuit that is composed of diodes and reactance, and being characterized in that the former three-phase bridge rectifier circuit provides a direct current electromagnetic coils with opening currents at the moment of pulling in and starting of the contactor while the latter rectifier circuit provides direct current electromagnetic coils with pulling and maintaining currents after pulling in the contactor, and the model is further composed of a microprocessor and a power supply circuit of the microprocessor, a bidirectional silicon controlled rectifier S1 being cascaded in the pulling-in power supply circuit of the contactor, a controlled branch circuit which controls the switch of the two rectifier circuits. The utility model has the advantages of being structured easily, being used durably and reliably, saving sources and being provided with intelligent controlling function which is contributed to the microprocessor supported by the corresponding software in the internal memory that intelligently controls the on and off of the contactor through the output end of the microprocessor.

Description

Dc operation three-phase ac contactor intelligent control module
Technical field
The utility model relates to a kind of electrical equipment control device, and particularly the control assembly of dc operation three-phase ac contactor is specially dc operation three-phase ac contactor intelligent control module.
Background technology
Traditional A.C. contactor is to adopt AC electromagnetic coil, is directly powered by AC power.Its shortcoming is that the loss of electromagnetic system of contactor is bigger, and the suction of electromagnetic system is subjected to the influence of supply voltage height, and the stability of contactor is just relevant with supply voltage with reliability.According to measurement, in the active power of ac contactor electromagnetic system loss, iron loss accounts for 65-75%, and the divided magnetic ring loss accounts for 25-30%, and the coil copper loss only accounts for 3-5%.As can be seen, the A.C.power loss in the electromagnetic consumable just accounts for more than 90% from above-mentioned measurement result.
For this reason, occurred the dc operation three-phase ac contactor now, promptly the solenoid of contactor adopts dc powered, and the three-phase contact of contactor links with the three-phase alternating current power supply circuits, is used to control the break-make and the conversion of three-phase alternating current electrical appliance.Change ac electromagnetism system into dc operation, result of the test shows, can save loss in iron core and the magnet ring up to more than 90%, also can eliminate the noise of electromagnetic system, reduces the temperature rise of coil, improves the reliability and stability of electromagnetic system.
Along with the dc operation A.C. contactor, how being extensive use of of dc operation three-phase ac contactor particularly makes the good and structure of its control circuit or control module performance simply more and more be subject to people's attention relatively.The control module of known dc operation three-phase ac contactor has: the German golden clock-DIL M of a new generation of Moeller company series contactor control module, " its control power supply is shaped to pulse control circuit voltage through electronic circuit; by best spring load characteristic of inhaling of microprocessor (CPU) internal memory; come the regulating and controlling coil current according to characteristic curve; at contactor adhesive stage input broad pulse voltage; make the safe and reliable closure of main contact; in the maintenance stage, feed-in burst pulse voltage, so not only reliably but also energy-conservation ".China Keyou Electromechanical Inst., Haidian Dist., Beijing energy-saving control module, " it has S1 and two groundwork states of S2.The S1 state is a starting state, and power supply is added in full voltage on the coil through rectifier bridge under this state, lasts about 80ms, and circuit is transformed into S2 state, i.e. hold mode automatically then.Under hold mode, coil obtains the dither sustaining voltage about 10V ".
The control module of existing dc operation three-phase ac contactor, structure are complicated, exist module easily to generate heat, defectives such as failure rate height.
Summary of the invention
The utility model solves defective and the deficiency that existing dc operation three-phase ac contactor control module exists, the intelligent control module of the simpler and reliable dc operation three-phase ac contactor of a kind of structure is provided, and is purpose only with the hardware configuration that connects for this intelligent control module.
The utility model is to adopt following technical scheme to realize: dc operation three-phase ac contactor intelligent control module, comprise and have module curing housing of drawing line end and the internal circuit that solidifies in housing, internal circuit comprises by diode D1, D3, D5 and diode D7, D8, D9 constitutes, be used for three-phase bridge rectifier circuit to the power supply of contactor d-c solenoid, internal circuit also comprise respectively by resistance R 1 and capacitor C 1 parallel connection again with diode D2 differential concatenation, resistance R 2 and capacitor C 2 parallel connections again with diode D4 differential concatenation, three branch roads that resistance R 3 and capacitor C 3 parallel connections constitute with diode D6 differential concatenation again, diode D2 in three branch roads, D4, the positive terminal of D6 links to each other, form the common reference place (GND) of module, the other end of three branch roads respectively with diode D7, D8, the negative pole end of D9 (also is diode D1 simultaneously, D3, the positive terminal of D5) links to each other, the negative pole end of the d-c solenoid of contactor and diode D7, D8, be in series with the normally closed auxiliary contact of contactor between the positive pole of D9, the power supply circuits that in internal circuit, also comprise a microprocessor (CPU) and microprocessor, the negative pole end of the d-c solenoid of contactor and diode D7, D8, also be in series with bidirectional triode thyristor S1 between the positive pole of D9, the control utmost point g of bidirectional triode thyristor S1 is connected with the bidirectional triode thyristor on-off control circuit that is subjected to little processing controls, and the negative pole end of d-c solenoid is linked to each other by the controlled branch road of microprocessor control with the common reference place of module by one.
The foregoing circuit structure of module is made equivalent analysis just as can be seen, this module has comprised two rectification circuits in fact, one is by diode D1, D3, D5 and diode D7, D8, the three-phase bridge rectifier circuit of the known configurations that D9 constitutes, another is by diode D1, D3, D5 and three rectification circuits that have current limliting buck functionality (the current limliting buck functionality is realized by resistance and the electric capacity reactance that forms in parallel) that branch road constitutes, the former provides starting current to d-c solenoid when the contactor adhesive starts, the latter provides adhesive to keep electric current to d-c solenoid after the contactor adhesive, and microprocessor is finished between the two switching by the break-make of control bidirectional triode thyristor S1 and controlled branch road.When the contactor adhesive started, controllable silicon was in conducting state, and AC power provides big adhesive starting current through known three-phase bridge rectifier circuit to direct current magnet-wire magnetic, makes the reliable adhesive of contactor; After the contactor adhesive, bidirectional triode thyristor by and controlled branch road lead can, this moment, the rectification circuit of AC power through having the current limliting buck functionality provided less adhesive to keep electric current to d-c solenoid.
Functional circuit moduleization has been development trend.Functional circuit forms product with the form of module, directly sells on market.The intelligent control module of dc operation three-phase ac contactor described in the utility model, its circuit structure has simple, durable, reliable, energy-conservation characteristics.The corresponding software support that microprocessor is deposited within it can be carried out Based Intelligent Control to the switching of contactor down and by its signal output part, promptly can realize the switching of contactor according to the designed switching time of software.Under the precondition that guarantees the reliable adhesive of contactor, can reduce the impact velocity during the contact closure, thereby this control module has the function of intelligent control.
Description of drawings
Fig. 1 is a module appearance structure schematic diagram described in the utility model;
Fig. 2 is the schematic diagram of inside modules circuit described in the utility model;
Embodiment
Dc operation three-phase ac contactor intelligent control module, comprise and have module curing housing 1 of drawing line end and the internal circuit that solidifies in housing, internal circuit comprises by diode D1, D3, D5 and diode D7, D8, D9 constitutes, be used for three-phase bridge rectifier circuit to the power supply of contactor d-c solenoid, internal circuit also comprise respectively by resistance R 1 and capacitor C 1 parallel connection again with diode D2 differential concatenation, resistance R 2 and capacitor C 2 parallel connections again with diode D4 differential concatenation, three branch roads that resistance R 3 and capacitor C 3 parallel connections constitute with diode D6 differential concatenation again, diode D2 in three branch roads, D4, the positive terminal of D6 links to each other, form the common reference place (GND) of module, the other end of three branch roads respectively with diode D7, D8, the negative pole end of D9 (also is diode D1 simultaneously, D3, the positive terminal of D5) links to each other the negative pole end of the d-c solenoid of contactor and diode D7, D8, be in series with the normally closed auxiliary contact J of contactor between the positive pole of D9 b, in internal circuit, also comprising the power supply circuits of a microprocessor (CPU) and microprocessor, the power supply circuits of microprocessor comprise by triode BG 3, be serially connected with triode BG 3The single knife switch K of base loop 1, resistance R 4, voltage stabilizing didoe DW 1The direct-current voltage reducing circuit of forming and by three terminal regulator IC 2The voltage stabilizing circuit of forming, wherein triode BG 3Collector electrode link to each other emitter and three terminal regulator IC with the positive voltage output end of three-phase bridge rectifier circuit 2The positive voltage input be connected, at three terminal regulator IC 2Positive voltage input and output be parallel with filter capacitor C5, C6 respectively, also be in series with bidirectional triode thyristor S1 between the positive pole of the negative pole end of the d-c solenoid of contactor and diode D7, D8, D9, its control utmost point g is connected with the bidirectional triode thyristor on-off control circuit that is subjected to little processing controls, the on-off control circuit of this bidirectional triode thyristor S1 comprises triode BG1, bidirectional triode thyristor S 1Control utmost point g by current-limiting resistance R 12With triode BG 1Collector electrode link to each other triode BG 1Grounded emitter, triode BG 1Base stage by base resistance R 5, earth resistance R 6Be connected to the output port P1 of microprocessor, the negative pole end of d-c solenoid is linked to each other by the controlled branch road of microprocessor control with the common reference place of module by one, this controlled branch road comprises triode B62, and the negative pole end of d-c solenoid is often opened auxiliary contact J through contactor aWith triode BG 2Collector electrode link to each other triode BG 2Grounded emitter, triode BG 2Base stage by base resistance R 8, earth resistance R 9Be connected to the corresponding output end mouth P2 of microprocessor.Three terminal regulator IC 2Select the 78L05 model for use.
Two ends at the d-c solenoid of contactor are parallel with energy storage capacitor C4.Capacitor C 4 can make contactor stablize adhesive.
Between the positive pole of the negative pole end of the d-c solenoid of contactor and diode D7, D8, D9, be in series with thermistor RT1.Thermistor RT1 plays the current-limiting protection effect of the starting current supply circuit of d-c solenoid.
The power supply circuits of the microprocessor in the internal circuit also comprise optocoupler controllable silicon G1, and the controllable silicon among the optocoupler controllable silicon G1 is parallel to the two ends of single knife switch K1, and to cause the module solidifying shell external as drawing line end for the two ends of the light-emitting diode among the optocoupler controllable silicon G1.After voltage signal is received at light-emitting diode two ends among the optocoupler controllable silicon G1, can make the conducting of optocoupler controllable silicon, thereby play the effect of the control microprocessor power supply circuits break-make identical with single knife switch K1.Can realize Long-distance Control by optocoupler controllable silicon (being specially lead-out wire) to module by the light-emitting diode in the optocoupler controllable silicon.
According to circuit structure, this module has 10 to draw line end.During use, line end 1,2,3 is the introducing line end of three-phase alternating-current supply, and line end 4,5 links to each other with the d-c solenoid two ends of contactor, line end 5,6 and contactor often open auxiliary contact J aTwo ends link to each other, the normally closed auxiliary contact J of line end 7,8 and contactor bTwo ends link to each other, and line end 9,10 is the lead-out wire at the light-emitting diode two ends of optocoupler controllable silicon G1, as the Long-distance Control line of module.Three-phase alternating-current supply is through the interchange contact of contactor (J A, J B, J C) link to each other with load.On the curing housing of module, be provided with the PAL interface 2 able to programme of microprocessor.
Light-emitting diode two ends (being between the line end 9,10) by single knife switch K1 on the lower module or optocoupler controllable silicon G1 provide voltage signal, make triode BG3 conducting, the power supply circuits of microprocessor are started working, and the pulsating dc voltage that is provided by three-phase bridge rectifier circuit is via triode BG 3, resistance R 4, voltage stabilizing didoe DW 1, capacitor C 5, K switch 1With light activated power thyristor S 1The step-down filter circuit seamless of forming forms the direct voltage about 15V, and then via three terminal regulator IC 2, capacitor C 6Form filter circuit of pressure-stabilizing, 15 volts direct voltages are shaped to 5 volts of voltages stably, thereby for microprocessor provides required working power, under the microprocessor support of corresponding software within it, its output P1, P2 provide working signal, and make triode BG1 and BG2 conducting.Work as K switch 1When not having closure or light activated power thyristor not to receive external control signal, because triode BG 3Base stage does not have reference voltage, therefore is in cut-off state, and the power supply circuits of microprocessor are not worked, thereby whole module also is in off position; In the contacts of contactor adhesive stage, because the normally closed auxiliary contact J of contactor bBe in closure state, and bidirectional triode thyristor S1 also is in conducting state (because triode BG1 conducting, the control circuit of bidirectional triode thyristor S1 is a conducting state), AC power is through three-phase bridge rectifier circuit, bidirectional triode thyristor S1 and normally closed auxiliary contact J bProvide bigger attract current to d-c solenoid, make the reliable adhesive in its contact, exchange contact (J A, J B, J C) power to the load after the adhesive; After the contacts of contactor adhesive, normally closed auxiliary contact J bDisconnect, often open auxiliary contact J aClosed (triode BG2 also conducting this moment) makes controlled branch road conducting, and the rectification circuit that has the current limliting buck functionality provides the less electric current of keeping to d-c solenoid, and contactor is kept adhesive.Under software is supported, the signal of signal output part P1, the P2 output of microprocessor can have individual lag time, be that the P1 end provides signal earlier, make the adhesive current supply circuit elder generation conducting of d-c solenoid, then, P2 end provides signal again, and what make d-c solenoid keeps the current supply circuit conducting, thereby makes d-c solenoid be subjected to often to open auxiliary contact J a, normally closed auxiliary contact J bWith the dual control of output end of microprocessor signal, make control module have the function of Based Intelligent Control.

Claims (5)

1, a kind of dc operation three-phase ac contactor intelligent control module, comprise and have the module of drawing line end and solidify housing (1) and solidify internal circuit in housing, internal circuit comprises by diode D1, D3, D5 and diode D7, D8, D9 and constitutes, is used for the three-phase bridge rectifier circuit to contactor d-c solenoid power supply, it is characterized by:
Internal circuit also comprise respectively by resistance R 1 and capacitor C 1 parallel connection again with diode D2 differential concatenation, resistance R 2 and capacitor C 2 parallel connections again with diode D4 differential concatenation, three branch roads that resistance R 3 and capacitor C 3 parallel connections constitute with diode D6 differential concatenation again, diode D2 in three branch roads, D4, the positive terminal of D6 links to each other, form the common reference place (GND) of module, the other end of three branch roads respectively with diode D7, D8, the negative pole end of D9 links to each other, the negative pole end of the d-c solenoid of contactor and diode D7, D8, be in series with the normally closed auxiliary contact J of contactor between the positive pole of D9 b,
Also comprise the power supply circuits of a microprocessor (CPU) and microprocessor in internal circuit, the power supply circuits of microprocessor comprise by triode BG 3, be serially connected with triode BG 3The single knife switch K of base loop 1, resistance R 4, voltage stabilizing didoe DW 1The direct-current voltage reducing circuit of forming and by three terminal regulator IC 2The voltage stabilizing circuit of forming, wherein triode BG 3Collector electrode link to each other emitter and three terminal regulator IC with the positive voltage output end of three-phase bridge rectifier circuit 2The positive voltage input be connected,
Also be in series with bidirectional triode thyristor S1 between the positive pole of the negative pole end of the d-c solenoid of contactor and diode D7, D8, D9, its control utmost point g is connected with the bidirectional triode thyristor on-off control circuit that is subjected to little processing controls, the on-off control circuit of this bidirectional triode thyristor S1 comprises triode BG1, bidirectional triode thyristor S 1Control utmost point g by current-limiting resistance R 12With triode BG 1Collector electrode link to each other triode BG 1Grounded emitter, triode BG 1Base stage by base resistance R 5, earth resistance R 6Be connected to the output port P1 of microprocessor,
The negative pole end of d-c solenoid is linked to each other by the controlled branch road of microprocessor control with the common reference place of module by one, this controlled branch road comprises triode BG2, and the negative pole end of d-c solenoid is often opened auxiliary contact J through contactor aWith triode BG 2Collector electrode link to each other triode BG 2Grounded emitter, triode BG 2Base stage by base resistance R 8, earth resistance R 9Be connected to the corresponding output end mouth P2 of microprocessor.
2, dc operation three-phase ac contactor intelligent control module as claimed in claim 1, it is characterized by: the power supply circuits of the microprocessor in the internal circuit also comprise optocoupler controllable silicon G1, controllable silicon among the optocoupler controllable silicon G1 is parallel to the two ends of single knife switch K1, and to cause the module solidifying shell external as drawing line end for the two ends of the light-emitting diode among the optocoupler controllable silicon G1.
3, dc operation three-phase ac contactor intelligent control module as claimed in claim 1 or 2 is characterized by: the two ends at the d-c solenoid of contactor are parallel with capacitor C 4.
4, dc operation three-phase ac contactor intelligent control module as claimed in claim 1 or 2 is characterized by: be in series with thermistor RT1 between the positive pole of the negative pole end of the d-c solenoid of contactor and diode D7, D8, D9.
5, dc operation three-phase ac contactor intelligent control module as claimed in claim 3 is characterized by: be in series with thermistor RT1 between the positive pole of the negative pole end of the d-c solenoid of contactor and diode D7, D8, D9.
CN 03268568 2003-06-28 2003-06-28 DC operated three phase AC contactor intelligent control module Expired - Fee Related CN2634635Y (en)

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CN 03268568 CN2634635Y (en) 2003-06-28 2003-06-28 DC operated three phase AC contactor intelligent control module

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100341090C (en) * 2005-06-09 2007-10-03 王稳忠 Intelligent switch-on controlling module of AC contactor
CN105897020A (en) * 2014-10-20 2016-08-24 河南金马信捷电气科技有限公司 Anti-explosion frequency converter rectifying circuit suitable for two kinds of voltage power supplies

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100341090C (en) * 2005-06-09 2007-10-03 王稳忠 Intelligent switch-on controlling module of AC contactor
CN105897020A (en) * 2014-10-20 2016-08-24 河南金马信捷电气科技有限公司 Anti-explosion frequency converter rectifying circuit suitable for two kinds of voltage power supplies
CN105897020B (en) * 2014-10-20 2018-08-17 河南金马信捷电气科技有限公司 It is suitble to the explosion-proof frequency converter rectification circuit of two kinds of power voltage supplies

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C19 Lapse of patent right due to non-payment of the annual fee
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