CN2368643Y

CN2368643Y - Automatic electronic energy saver for arc welder

Info

Publication number: CN2368643Y
Application number: CN 99210122
Authority: CN
Inventors: 吕德武
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-05-08
Filing date: 1999-05-08
Publication date: 2000-03-15
Anticipated expiration: 2009-05-08

Abstract

The utility model relates to an automatic electronic energy saver for a welder, which can enable the welder to be automatically started in contact for welding and automatically shut at the time of zero load and time delay. The automatic electronic energy saver for a welder is matched with a contactor, and controls a main circuit of the welder. When a welding stick at the output end of the welder is in contact with a workpiece for welding work, a control circuit is triggered by a produced short circuit signal and a welder signal to be connected; Therefore, the welder is automatically started. A circuit for identifying the welder signal sends a signal into a comparator according to two different voltage signals of the welding and the zero load of the welder, so that the zero load signal is checked. When the welder is in the zero load. The comparator outputs low electrical levels, and a time delay halt circuit begins to delay time. When the zero load exceeds the prescribed time of the zero load, the welder is shut automatically to complete the complete process of automatic start and automatic shut.

Description

Welding machine electronics automatic energy saving device

The utility model relates to a kind of interchange, metal rectifier welding set versatility electronics automatic energy saving switching device, is the welding machine electronics automatic energy saving device that can make welding machine striking welding Auto Power On and unloaded time-delay autostop by it.

Welding machine electronics automatic energy saving device adopts the electronics new technology, and all electronic original part is contained in the plastic casing, and volume is 110mm * 100mm * 45mm.

Employed common welding machine does not possess automatic open and close machine function at present, and this makes troubles for remote welding, aerial welding, underground welding, causes welding machine long idle time, wastes a large amount of electric energy.

The purpose of this utility model provides a kind of versatility and exchanges, metal rectifier welding set electronics automatic energy saving device.Cooperate the welding machine contactor, the control main circuit of the welding machine, butt welding machine is realized Auto Power On, the purpose of unloaded time-delay autostop.

Solution of the present invention is: in plastic casing, the welding rod of AC welding set output 1,2, metal rectifier welding set

output

3,4 and workpiece striking welding job or no-load running and the alternating signal that produces enter integrated circuit NE555 by the work of R-S trigger electronic auto-control mode.Resistance R ₂With diode D ₁Series connection is connected power supply V _DAnd between the metal rectifier welding set output 3, resistance R ₃, capacitor C ₂And connect the back with diode D ₂Series connection is connected power supply V _CAnd between the metal rectifier welding set output 3, welding terminal 3, diode D ₁, D ₂The contact of negative electrode and AC welding set airborne signals diode D ₅Negative electrode connects, welding terminal 4 ground connection; Resistance R ₃, capacitor C ₂, diode D ₂, D ₄Anode, triode T ₂The contact of colelctor electrode is connected with R-S trigger trigger end S, and the AC welding set triggering signal is through diode D ₄Also be connected, form welding machine striking welding triggering signal path with R-S trigger trigger end S.By power supply V _CPass through resistance R ₃Provide high level signal S=1 to trigger S end, at this moment, R-S trigger output Q=0 is a low level, presents cut-off state.When

welding machine output

3,4 end welding rods and workpiece striking welding job, the short-circuit signal of generation makes diode D ₂Conducting, R-S trigger trigger end S=0 ground connection, output Q=1 is a high level, the R-S trigger becomes conducting state by cut-off state, has set up R-S trigger trigger control circuit; Resistance R ₄Be connected across R-S trigger output Q end and triode T ₁Between the base stage, triode T ₁Connect with midget relay, be connected power supply V _DAnd between the ground wire.When the welding machine welding job, R-S trigger output Q=1 is a high level, and before the unloaded time-delay shutdown of welding machine reset signal did not arrive, conducting state (Q=1) was kept consistent, and passes through resistance R ₄To triode T ₁Base voltage is provided, makes triode T ₁Saturation conduction, midget relay is by power supply V _DAdhesive, the control main circuit of the welding machine is connected; Resistance R ₈, R ₉Series connection is connected between

welding machine output

3 and 4 ends resistance R ₈, R ₉Contact be connected with comparator inverting input in the welding machine signal recognition circuit, after airborne signals V is detected, be connected with the unloaded time-delay of welding machine halt circuit again, airborne signals V is by reset diode D ₃Negative electrode, resistance R ₆, R ₇Triode T ₂The contact of colelctor electrode is connected with R-S trigger reset end R, and reset terminal R passes through resistance R ₇Ground connection (R=0).Surpass its setting 30 seconds-60 seconds when welding machine idle time, unloaded time-delay automatic shutdown circuitry output high level signal, reset diode D ₃Be connected across between unloaded time-delay halt circuit output and the R-S trigger reset end R, unloaded time-delay halt circuit output high level signal makes diode D ₃Conducting, when reset terminal R=1 was high level, the R-S trigger was become by conducting and ends, and output Q=0 is a low level, passes through resistance R ₄Make triode T ₁End, the midget relay dead electricity forces unloaded time-delay autostop.Solved welding machine no-load running and consumed a large amount of electric energy, brought convenience for welding machine open and close machine.

Owing to adopt technique scheme, can not add any element on line in welding machine output, only utilize the whether striking welding job of welding rod and workpiece on the electrode holder, reach the welding machine Auto Power On, the purpose of the unloaded autostop of delaying time.

The invention will be further described below in conjunction with the drawings and specific embodiments.

Shown in Figure 1 is voltage-stabilized power supply circuit.

Shown in Figure 2 is welding machine signal triggering control circuit.

Shown in Figure 3 is the welding machine signal recognition circuit.

Shown in Figure 4 is the unloaded time-delay of welding machine automatic shutdown circuitry.

Shown in Figure 5 is the AC welding set signal transformation circuit.

The described alternating voltage of Fig. 1 (380V, 220V) is through isolating transformer B step-down, full-bridge Dz ₁Rectification, capacitor C ₁Filtering, resistance R ₁Current limliting, Zener diode Dw voltage stabilizing provide the operating voltage V of this energy-saving appliance respectively _DAnd V _C

Welding machine signal triggering control circuit shown in Figure 2, metal rectifier welding set output 3 and diode D ₁, D ₂, D ₅Negative electrode connects, resistance R ₂With diode D ₁Series connection is connected power supply V _DAnd between the metal rectifier welding set output 3, provide signal voltage, make diode D to welding terminal ₂End.Integrated circuit NE555 presses the work of R-S trigger electronic auto-control mode.The logic function of R-S trigger 5 is: (1) S=1, R=0, Q=0 output are low level.S=0, R=0, Q=1 were output as high level when low level triggered.(2) R=1, S=1, Q=0 are output as low level, and R=0, S=1, Q=0 output still keep low level.R is a reset terminal.Resistance R ₃, capacitor C ₂, diode D ₂, D ₄Anode, triode T ₂The contact of colelctor electrode is connected with R-S trigger trigger end S, and S=1 is again with diode D ₂Series connection is connected between power supply Vc and the metal rectifier welding set output 34 end ground connection; Resistance R ₆, R ₇Reset diode D ₃Contact be connected resistance R with the reset terminal R of R-S trigger 5 ₇Ground connection (R=0) is equivalent to S=1, R=0, and when welding machine was static, its output Q=0 did not have high level signal.When welding rod and workpiece (3 and 4) striking welding job, the short-circuit signal of generation is by diode D ₂Trigger the S end of R-S trigger 5, be equivalent to S=0, the R end passes through resistance R ₇Ground connection is equivalent to R=0, so its output Q=1 is a high level signal.This high level passes through resistance R ₄Triode T is provided ₁Base voltage makes its saturation conduction, and midget relay 6 is through power supply V _DGet electric adhesive, connect main circuit of the welding machine, the welding machine operate as normal.

Also has output Q, a resistance R in this circuit from R-S trigger 5 ₄Contact and resistance R ₅, triode T ₂Base stage, T ₃The self-locking circuit of collector contact series connection.Triode T ₂Colelctor electrode is connected its grounded emitter with the trigger end S of R-S trigger 5.When the high level signal of R-S trigger 5 output Q through resistance R ₄Triode T is provided ₁In the time of base voltage, also pass through resistance R ₅To triode T ₂Base voltage is provided, makes triode T ₂Saturation conduction, T ₂Current collection is low level very.The trigger end S=0 of coupled R-S trigger 5 still keeps stable low level to trigger state.

This circuit also comprises a unloaded reset diode D ₃, the reset terminal R of R-S trigger 5, resistance R ₇Contact and resistance R ₆, triode T ₃The reset signal of series connection is removed self-locking circuit.When zero load time-delay high level signal enters diode D from the output 12 of time base circuit 11 ₃, when the reset terminal R=1 high level of R-S trigger 5 is resetted, through resistance R ₆Triode T is provided ₃Base voltage makes triode T ₃Saturation conduction, T ₃Colelctor electrode conducting ground connection and with triode T ₂Base stage connects, triode T ₂End T ₂Colelctor electrode is high level (S=1) by the low level upset, forces R-S trigger 5 to remove self-locking when resetting.The foundation in this two loop has guaranteed the stability of welding machine welding job and the reliability of unloaded time-delay autostop.

Comparator 7 shown in Figure 3 constitutes the welding machine signal recognition circuit.The AC welding set airborne signals is passed through diode D through shaping circuit ₅Join 4 end ground connection with metal rectifier welding set output 3.Resistance R ₁₁, R ₁₂Series connection is connected between power supply Vc and the ground, and the normal phase input end 9 of comparator 7 is by divider resistance R ₁₁, R ₁₂Contact determine reference voltage U.Resistance R ₈, R ₉Series connection is connected between metal rectifier welding set output 3 and 4 ends resistance R ₈, R ₉, R ₁₀Contact be connected with comparator inverting input 10, as the unloaded identification of welding machine voltage V control signal, resistance R ₁₀, diode D ₇Compensating circuit for power supply Vc.When the welding machine welding job, 65V during by zero load---80V voltage is reduced to 30V---fluctuates between the 50V, and the welding machine floating voltage signal V that produce this moment passes through resistance R ₈, R ₉Dividing potential drop detects the inverting input 10 that enters comparator 7, V＜U, and the output 8 output high level of comparator 7 are through resistance R ₁₃, R ₁₄Make switch triode T ₄End, unloaded time-delay automatic shutdown circuitry does not have operating voltage Vc ₁When welding machine was unloaded, output voltage was raised to 65V at once---and about 80V, this moment, welding machine floating voltage V was through resistance R ₈, R ₉Dividing potential drop detects the inverting input 10 that enters comparator 7, V＞U, and output 8 upsets of comparator 7 are passed through resistance R for electronegative potential ₁₃, R ₁₄Make triode T ₄Conducting, the time-delay automatic shutdown circuitry must be established the beginning time-delay by cable.The time-delay halt circuit is when starting working, and before welding machine does not reach regulation idle time, carries out welding job, switch triode T more this moment ₄Close immediately, cut off time-delay automatic shutdown circuitry operating voltage Vc ₁Switch triode T ₄In this circuit conducting or end along with the variation of welding machine welding job and no-load running.

The operating voltage Vc and the switch triode T of the unloaded time-delay of the described welding machine of Fig. 4 automatic shutdown circuitry ₄Emitter-base bandgap grading be connected.Resistance R ₁₅, capacitor C ₃The contact and the

input

13,14 of time base circuit 11 and connect after be connected in series again.By common mode and power supply Vc ₁System's ground wire connects.Reset diode D ₃Be connected across between the output 12 and R-S trigger 5 reset terminal R of time base circuit 11, as shown in Figure 2 circuit.When welding machine was unloaded, the time-delay automatic shutdown circuitry must be established the beginning time-delay by cable, and delay time is by capacitor C ₃, resistance R ₁₅Product decides: T=0.6931R ₁₅C ₃

When welding machine idle time during greater than the stipulated time (30 seconds---60 seconds), output 12 upsets of time base circuit 11 are high potential, by diode D ₃Provide high level signal (R=1) to the reset terminal R of R-S trigger 5, the output (Q=0) of R-S trigger 5 is overturn immediately be low level.Through resistance R ₄Make triode T ₁End, midget relay 6 dead electricity are cut off main circuit of the welding machine, make welding machine time-delay autostop.

Fig. 5 is the AC welding set signal transformation circuit.AC welding set output 1,2 presents low resistive, can not be directly and the R-S trigger match.The active step-down signal of definite value that AC welding set must be provided with by output 1,2 through full-bridge DZ ₂Behind the rectifying conversion, by diode D ₅, D ₆Unloaded stopping signal and triggering signal are provided respectively.Full-bridge DZ ₂Output and resistance R ₁₈, diode D ₅, D ₆Contact connect, D is provided simultaneously ₆The blanking voltage signal.Diode D ₅With resistance R ₁₈Series connection is connected between metal rectifier welding set

output

3 and 4 ends.AC welding set output 1,2 and full-bridge DZ ₂Input connects.When AC welding set is unloaded through full-bridge DZ ₂Rectification, resistance R ₁₈Dividing potential drop is by diode D ₅Through resistance R ₈, R ₉To the unloaded time-delay of welding machine signal recognition circuit, welding machine automatic shutdown circuitry, floating voltage signal V is provided, its principle is as described in Fig. 3, Fig. 4.

D ₆It is AC welding set triggering signal diode.The inverting input 16 of comparator 18 and the normal phase input end 9 of comparator 7 also connect, and reference voltage still is U, as shown in Figure 3.Resistance R ₁₆, R ₁₇Contact with connect again after the normal phase input end 17 of comparator 18 is connected, also be connected power supply V _CAnd between the ground, set up comparator 18 and trigger reference voltage U ₁, U in the static design of this circuit ₁＞U.Diode D ₆Be that the high pressure isolating diode is again a striking welding signal diode when AC welding set moves.D ₆Be connected across full-bridge DZ ₂Output and the normal phase input end 17 of comparator 18 between, because of U ₁＞U, the output 15 of comparator 18 is a high level, diode D ₄End its D ₄Anode is connected with the trigger end S of R-S trigger 5, and S=1 is a high level, as shown in Figure 2.When the welding rod of AC welding set output 1,2 and workpiece striking welding job, the short-circuit signal of generation has been removed full-bridge DZ immediately ₂Rectified signal is to diode D ₆Cut-off state.Diode D ₆Resistance R is passed through in conducting ₁₈Ground connection, the positive input 17 of comparator 18 triggers reference voltage U ₁＜U, the output 15 of its comparator 18 is a low level by static high level upset, diode D ₄Conducting ground connection, the trigger end S=0 of R-S trigger 5 is triggered, and its trigger output Q=1 is a high level, and its principle is as described in Figure 2.

Resistance R ₁₇, R ₁₈Proportioning is 2: 1 in its practical scope, and representative value is 10K Ω, 5K Ω, and when AC welding set output 1,2 welding rods and workpiece striking welding job, the short-circuit signal of generation makes diode D like this ₆During conducting, resistance R ₁₇, R ₁₈Be parallel form: r=(R ₁₇+ R ₁₈)/(R ₁₇R ₁₈) its resistance is very little, guarantees the triggering reference voltage U of comparator 18 normal phase input ends 17 ₁＜U, the output 15 that the forces comparator 18 high level upset during by static state is a low level, makes diode D ₄Obtain the triggering signal of correct low-level, guarantee the trigger end S=0 of R-S trigger 5.

(accompanying drawing 2 is the specification digest accompanying drawing)

Claims

1 one kinds of interchanges, rectification versatility welding machine electronics automatic energy saving device is characterized in that: in plastic casing, integrated circuit NE555 presses the work of R-S trigger electronic auto-control mode, resistance R ₂With diode D ₁Series connection is connected power supply V _DAnd between the metal rectifier welding set output (3), resistance R ₃, capacitor C ₂And connect the back with diode D ₂Series connection is connected between power supply Vc and the metal rectifier welding set output (3), (4) end ground connection, resistance R ₃, capacitor C ₂, diode D ₂, D ₄Anode, triode T ₂The contact of colelctor electrode is connected with the trigger end S of R-S trigger (5), when welding machine is static, and S=1, D ₄For AC welding set triggering signal diode also is connected with the trigger end S of R-S trigger (5), form welding machine striking welding triggering signal path; Resistance R ₄Be connected across the output Q and the triode T of R-S trigger (5) ₁Between the base stage, Q=0 when welding machine is static, triode T ₁Connect with midget relay (6), be connected power supply V _DAnd between the ground wire, set up trigger (5) output control circuit; Resistance R ₈, R ₉Be connected in series between welding terminal (3) and (4) resistance R ₈, T ₉, R ₁₀Contact be connected output (8) and resistance R with the inverting input (10) of comparator (7) in the welding machine signal recognition circuit ₁₃, triode T ₄Base stage is connected in series, floating voltage signal V after testing after, by triode T ₄Provide operating voltage Vc to zero load time-delay automatic shutdown circuitry ₁, reset diode D ₃Be connected across between the reset terminal R of the output (12) of time base circuit (11) and R-S trigger (5) resistance R ₆, R ₇, triode T ₂The contact of colelctor electrode also is connected resistance R with the reset terminal R of R-S trigger (5) ₇Ground connection, R=0 when static sets up the trigger time-delay path that automatically resets.

2 welding machine electronics automatic energy saving devices according to claim 1 is characterized in that: output Q, the resistance R of R-S trigger (5) ₄Contact and resistance R ₅Connect resistance R ₅, triode T ₂Base stage, T ₃The contact of colelctor electrode is connected in series, T ₂Emitter grounding, triode T ₂Colelctor electrode is connected with the trigger end S of R-S trigger (5), when Q=1 is high level, passes through resistance R ₅, make triode T ₂Saturation conduction ground connection makes trigger end S=0 that a stable self-locking form be arranged.

3 welding machine electronics automatic energy saving devices according to claim 1 is characterized in that: R-S trigger (5) reset terminal R, diode D ₃Negative electrode, resistance R ₇Contact and resistance R ₆Connect resistance R ₆With triode T ₃Base stage is connected in series, triode T ₃Emitter grounding, T ₃Colelctor electrode and triode T ₂Base stage, resistance R ₅Contact connect, when reset terminal R=1 high potential signal passes through resistance R ₆Make triode T ₃Saturation conduction ground connection forces triode T ₂End, make the trigger end S=1 of R-S trigger (5), overturn and remove self-locking circuit into high level forms a reset signal.

4 welding machine electronics automatic energy saving devices according to claim 1 is characterized in that: reset terminal R, the resistance R of R-S trigger (5) ₆, R ₇Contact and reset diode D ₃Negative electrode connects, reset diode D ₃Anode is connected successively with unloaded time-delay automatic shutdown circuitry, welding machine signal recognition circuit; Resistance R ₁₁, R ₁₂Series connection is connected between power supply Vc and the ground resistance R ₁₁, R ₁₂Contact be connected with the normal phase input end (9) of comparator (7), set up the reference voltage U of comparator (7), resistance R ₈, R ₉Series connection is connected between welding machine output (3) and (4) end resistance R ₈, R ₉, R ₁₀Contact be connected with the inverting input (10) of comparator (7), set up welding machine floating voltage signal V control end; Resistance R ₁₀, diode D ₇Be power supply Vc compensating circuit, resistance R ₁₃Be connected across the output (8) and triode T of comparator (7) ₄Between the base stage, R ₁₄Be the biasing resistor of triode T4, T ₄Be the unloaded time-delay of welding machine automatic shutdown circuitry power switch triode, its emitter-base bandgap grading and power supply Vc join T ₄Colelctor electrode provides operating voltage Vc to the unloaded time-delay of welding machine halt circuit ₁Time base circuit (11) is pressed temporary steady state way work, resistance R ₁₅, capacitor C ₃Be connected in series in power supply Vc ₁And between the ground, resistance R ₁₅, capacitor C ₃Contact and input (13), (14) of time base circuit (11) and meet reset diode D ₃Be connected across between the reset terminal R of the output (12) of time base circuit (11) and R-S trigger (5).

5 welding machine electronics automatic energy saving devices according to claim 1 is characterized in that: trigger end S, the resistance R of R-S trigger (5) ₃, capacitor C ₃, diode D ₂Anode, triode T ₂The contact of colelctor electrode and AC welding set signal diode D ₄Anode connects, and its negative electrode is connected with the output (15) of comparator (18); Full-bridge Dz ₂Input is connected with AC welding set output (1), (2), and the step-down signal is through full-bridge Dz ₂Rectification output end and diode D ₅, D ₆, resistance R ₁₈Contact connect, diode D is provided simultaneously ₆Anti-phase blanking voltage signal, diode D ₅With resistance R ₁₈Series connection is connected between metal rectifier welding set output (3) and (4) end, sets up AC welding set airborne signals path; The inverting input (16) of comparator (18) and its comparator (7) normal phase input end (9) also connect also and resistance R ₁₁, R ₁₂Contact connect public its reference voltage U, resistance R ₁₆, R ₁₇Series connection also is connected between power supply Vc and the ground wire resistance R ₁₆, R ₁₇Diode D ₆The contact of anode is connected with comparator (18) normal phase input end (17), has set up AC welding set triggering signal reference voltage U ₁Control end, diode D ₆Be connected across full-bridge Dz ₂Between the normal phase input end (17) of rectification output end and comparator (18), in the static design of this circuit, U ₁＞U, comparator (18) output (15) is a high level like this, diac D ₄Anti-phase ending, when AC welding set output (1), (2) end welding rod and workpiece striking welding, the short-circuit signal of generation has been removed full-bridge Dz immediately ₂Rectified signal is to diode D ₆Cut-off state, make diode D ₆Conducting, resistance R ₁₈, R ₁₇Because of diode D ₆Conducting, its value in parallel is very little, and normal phase input end (17) welding machine of comparator (18) triggers reference voltage U ₁＜U, output (15) upset is low level, diode D ₄Conducting ground connection (S=0), diode D ₄Be connected across between comparator (18) output (15) and R-S trigger (5) the trigger end S.

6 welding machine electronics automatic energy saving devices according to claim 1 is characterized in that: resistance R ₁₇, R ₁₈Proportioning be 2: 1.