CN2469544Y

CN2469544Y - Intelligence magnetic memory AC contactor

Info

Publication number: CN2469544Y
Application number: CN 01209424
Authority: CN
Inventors: 郦凤根; 章友梅; 周增忠
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-03-16
Filing date: 2001-03-16
Publication date: 2002-01-02
Anticipated expiration: 2011-03-16

Abstract

The utility model belongs to an electromagnetic relay, which comprises an iron core, a coil, a keeper, a fixed contact, a moving contact, a release spring and a circuit control device, wherein the circuit control device is arranged with an automatic return switch, a pull-in circuit, a breaking circuit and an electronic switch. The utility model is characterized in that the circuit control device also comprises a pull-in signal generation modular circuit (XHD), a breaking or time-delay breaking signal generation modular circuit (FYD) and a voltage detection modular circuit (DJD). Applicable to alternating-current contactors of various power equipments, the utility model solves the problem of one-module circuits and further improves the operational stability and reliability of alternating-current contactors.

Description

Intellectual magnetic memory A.C. contactor

The utility model belongs to electromagnetic relay, is specifically related to the improvement of control relay circuit.

Magnetic memory A.C. contactor utilizes the characteristic of electromagnetic core, to omit the mode of holding current, operation energy consumption is significantly reduced, and has improved its stability, reliability.The disclosed before this magnetic memory of inventor A.C. contactor comprises iron core, coil, armature, fixed contact, moving contact and retracting spring, and circuit control device.Be provided with separate attraction circuit and branch deenergizing in the technical scheme, but voltage detecting circuit is wherein all arranged, be not easy to improve performance; And be that the variation that adapts to line voltage in service will be set by manual methods; set and require height; the waveform width of adhesive signal is too short will to cause adhesive insufficient; longly then may burn contactor coil; particularly when line voltage decline; during near the under-voltage protection value, the reliability of its adhesive can descend.

The purpose of this utility model is to propose a kind of improved intellectual magnetic memory A.C. contactor; it adopts the circuit design of modular; can be automatically realize control to the A.C. contactor user mode improving protective value, ensure the safe operation of power consumption equipment according to the variation of line voltage.

Intellectual magnetic memory A.C. contactor of the present utility model, comprise iron core, coil, armature, fixed contact, moving contact and retracting spring, and circuit control device, be provided with self-resetting switch, attraction circuit, branch deenergizing and electronic switch in the circuit control device, it is characterized in that also comprising in the circuit control device:

(1), an adhesive signal generating module circuit (XHD), form by amplifier 1/2LM393 and related elements thereof, being used to produce triggering signal opens electronic switch (K2) work and makes the attraction circuit conducting, its input L21 power supply that gets access to grid, L22 connects the hot end of electronic switch (K1), and output L23 connects the trigger control end of electronic switch (K2);

(2), a disjunction or the breaking signal generation modular circuit (FYD) of delaying time, mainly containing the low pass discharge circuit parallel connection of being made up of the charging circuit and an electronic switch (K31) of storage capacitor (C32) formation combines, output L34, the L35 of module and the two ends of coil join, make its current direction and attract current opposite, provide breaking current to realize disjunction with it, its input: the charge power supply end L31 power supply that gets access to grid, control end L32 connects the back of power input self-resetting switch S2 in succession, and earth terminal L33 is by electronic switch (K1) ground connection;

(3), a voltage detection module circuit (DJD), constitute by two amplifier 1/2LM393 and peripheral cell, be used for the detection of grid supply voltage, the voltage ratio of setting with 2 pin, 5 pin, by 1 pin, 7 pin output control level, from motion tracking with set the operating state of A.C. contactor, its input L41 power supply that gets access to grid, the direct ground connection of earth terminal L42, output L43 connects the trigger control end of electronic switch (K1).

Intellectual magnetic memory A.C. contactor of the present utility model has adopted mutually independently function module circuit, makes it antijamming capability and strengthens, and has further improved A.C. contactor operation stability and reliability.Version of the present utility model in addition is convenient to test more, safeguards, change, and Combination Design.For example design the electronic lock button-type, under voltage protection type, under voltage/overvoltage protection type, under voltage time-delay disjunction type, open-phase protection type, the Series AC Contactor of different characteristic modules such as outage time-delay disjunction type according to different application and needs.

Followingly make specific description according to embodiment and accompanying drawing thereof.

Fig. 1 is a modular organization schematic diagram of the present utility model.

Fig. 2 is adhesive signal generating circuit (module) figure.

Fig. 3 is disjunction or time-delay breaking signal generation circuit (module) figure.

Fig. 4 is voltage detecting circuit (module) figure.

Shown in accompanying drawing.Fig. 1 has provided the basic structure content of intellectual magnetic memory A.C. contactor, and it comprises iron core 1, coil 2, armature 3, fixed contact 4, moving contact 5 and back-moving spring 6, and the circuit arrangement of controlling their work.Circuit arrangement is provided with self-resetting switch S1, S2, provide the attraction circuit of exciting curent to coil, the branch deenergizing of erasing current is provided, present coiler part of disjunction circuit table and attraction circuit are overlapping, its electric current is different and flow to opposite, the electronic switch that is located in the circuit has K1, and K2, and relevant control circuit is fairly simple in Fig. 1, detailed structure content has moved on to XHD, FYD, among the DJD, just Fig. 2, Fig. 3, control circuit illustrated in fig. 4.L1, L2, the position at L3 place corresponds to the connection end point of the introducing electric network source of live wire or phase line, and L4 then is ground wire or O line connection end point.The power supply direct current that rectifier diode VD1 provides work to use for line chart 2.A1, A2 are coil pile crown contact.

Figure 2 shows that adhesive signal generating module circuit (XHD), form by amplifier 1/2LM393 and related elements thereof, being used to produce triggering signal opens electronic switch (K2) work and makes the attraction circuit conducting, its input L21 power supply that gets access to grid, L22 connects the hot end of electronic switch (K1), and output L23 connects the trigger control end of electronic switch (K2); VD21 is a rectifier diode among the figure, and R21, R22 are divider resistance.Capacitor C 21 and resistance R 23 makes voltage-stabiliser tube VD22, VD23 stable working as voltage stabilizing, provides burning voltage by resistance R 25 for 5 pin of amplifier.Resistance R 25 and electric capacity 22 can be the pulse duration that amplifier is determined output waveform.Amplifier 7 pin output partly composition is just exported with door.

Figure 3 shows that disjunction or time-delay breaking signal generation modular circuit (FYD), mainly containing the low pass discharge circuit parallel connection of being made up of the charging circuit and an electronic switch (K31) of storage capacitor (C32) formation combines, the output L34 of module, the two ends of L35 and coil join, make its current direction and attract current opposite, provide breaking current to realize disjunction with it, its input: the charge power supply end L31 power supply that gets access to grid, control end L32 connects the L3 connection end point of power supply in succession, earth terminal L33 is by electronic switch K1 (Fig. 1) ground connection, by the earth terminal ground connection of K1.Diagram shows: connect power supply from L31, to current-limiting resistance R31 and capacitor C 32, C33, unidirectional conducting is formed charging circuit with diode VD36 through rectifier diode VD31.The external self-resetting switch S2 of L32, its closed interchange that inserts is through rectifier diode VD32 rectification, with R32, R33 shunt resistance dividing potential drop, its pulsating voltage is by capacitor C 31, K31 opens and conducting by force with electronic switch, and then from capacitor C 32: L34 → coil 2 → L35 → R35 → K31 → C32 constitutes the Low ESR discharge loop.Coil current oppositely passes through, disjunction rapidly.

Wherein be used to delay time the signal generating circuit of disjunction by storage capacitor C32, current-limiting resistance R37, charging capacitor C33, bidirectional diode VD33, the outer coil 2 of electronic switch K31 and module is formed, and by storage capacitor C32 from high impedance discharge circuit discharge, simultaneously to capacitor C 33 chargings, for the electronic switch K31 in the Low ESR discharge circuit provides voltage triggering signal.The time-delay disjunction of this circuit is automatic disjunction.If the electric network source end that L31 connected disconnects, then will cause charging circuit to interrupt, at this moment storage capacitor C32 is among the high impedance discharge loop by C32 → L34 → coil 2 → L35 → R37 → C33 → C32, to capacitor C 33 reverse chargings, when raising, voltage makes bidirectional diode VD33 conducting after current-limiting resistance R34 opens electronic switch K31, the low impedance circuit discharge of storage capacitor C32 by being made of electronic switch then still can make the A.C. contactor disjunction., and then make bidirectional diode be conducting to electronic switch K31 to trigger and open the process that the process that forms the discharge disjunction is the time-delay disjunction, decide the delay time of disjunction by the time constant of adjusting the high impedance discharge loop to C33 charging by capacitor C 32.

Figure 4 shows that voltage detection module circuit (DJD), constitute by two amplifier 1/2LM393 and peripheral cell, be used for voltage ratio that detection of grid supply voltage and 2 pin, 5 pin set, by 1 pin, 7 pin output control level, automatically floating voltage changes and determines the operating state of A.C. contactor, its input L41 power supply that gets access to grid, L42 ground connection, output L43 connects the trigger control end of electronic switch (K1).Specifically electric network source inserts the information of the mains voltage variations that just has, insert 6 pin of amplifier through rectifier diode VD41 rectification and resistance R 41, R47 dividing potential drop, provide a specific level through a road 3 pin that insert amplifier of divider resistance R42 and R43, R45.The output that is provided by voltage-stabiliser tube VD42, VD43 is respectively as operating voltage and reference level.In the normal voltage scope, output L43 should make electronic switch K1 conducting, overtension or cross and lowly all to make it to close, and under its closed condition, not adhesive of A.C. contactor perhaps is under the attracting state but gives disjunction automatically.

The course of work of this intellectual magnetic memory A.C. contactor is summarized as follows:

1. A.C. contactor is operated in the normal voltage scope, electronic switch K1 conducting, when pressing self-resetting switch S1, the adhesive signal generating circuit connects because of input L21, make electronic switch K2 conducting, breaking signal generation this moment circuit is also in running order, thus the formation of the work loop of coil 2 (L1 → VD1 → A1 → coil 2 → K2 → L4).By the adhesive exciting curent, iron core 1 magnetizes in the coil 2, and its powerful electromagnetic force attracts armature 3 to come, and it overcomes the pushing tow resistance of retracting spring 6, drives moving contact 5 and contacts with fixed contact 4.Attracting process is finished, and the external major loop of A.C. contactor is connected.At this moment self-resetting switch S1 discharges automatically and resets.Reset the back in the input of L1 end no current, and iron-core coil relies on its magnetic memory characteristic, still remains the adhesive operating state.

2. A.C. contactor is in improper voltage range, and then electronic switch K1 closes, and K2 also is in closed condition, no adhesive effect, and power consumption equipment is not worked.

3. when wanting the disjunction A.C. contactor, press self-resetting switch S2, at this moment breaking signal generation circuit FYD still has the access power supply because of its input L31, output L34 is that the A2 point connects electricity, and because of connecting then electronic switch K31 conducting immediately of S2, the erasing current that flows through K31 again from L34 coils 2 to L35 produces immediately, iron core is lost magnetism, elastic force effect lower armature at retracting spring resets, and moving contact separates with fixed contact, cuts off major loop.

4. during the sticking after the A.C. contactor adhesive, when changing to of line voltage is too high or too low, voltage detecting circuit DJD will make electronic switch K1 close, by breaking signal generation circuit FYD immediately or time-delay produce erasing current, the corresponding automatic disjunction of A.C. contactor.

Claims

1, a kind of intellectual magnetic memory A.C. contactor, comprise iron core (1), coil (2), armature (3), fixed contact (4), moving contact (5) and retracting spring (6), and circuit control device, be provided with self-resetting switch (S1, S2), attraction circuit, branch deenergizing and electronic switch (K1, K2) in the circuit control device, it is characterized in that also comprising in the circuit control device:

(1), adhesive signal generating module circuit, form by amplifier 1/2LM393 and related elements thereof, being used to produce triggering signal opens electronic switch (K2) work and makes the attraction circuit conducting, its input L21 power supply that gets access to grid, L22 connects the hot end of electronic switch (K1), and output L23 connects the trigger control end of electronic switch (K2);

(2), a disjunction or the breaking signal generation modular circuit of delaying time, mainly containing the low pass discharge circuit parallel connection of being made up of the charging circuit and an electronic switch (K31) of storage capacitor (C32) formation combines, output L34, the L35 of module and the two ends of coil join, make its current direction and attract current opposite, provide breaking current to realize disjunction with it, its input: the charge power supply end L31 power supply that gets access to grid, control end L32 connects the back (L3) of power input self-resetting switch (S2) in succession, and earth terminal L33 connects electronic switch (K1) ground connection;

(3), voltage detection module circuit, constitute by two amplifier 1/2LM393 and peripheral cell, be used for the detection of grid supply voltage, the voltage ratio of setting with 2 pin, 6 pin, by 1 pin, 7 pin output control level, from motion tracking with set the operating state of A.C. contactor, its input L41 power supply that gets access to grid, L42 ground connection, output L43 connects the trigger control end of electronic switch (K1).