CN106624270A - Alternating current welding machine based on linkage control design - Google Patents

Abstract

The invention discloses an alternating current welding machine based on linkage control design. The alternating current welding machine is provided with a no-load protection circuit, a power supply circuit, a fan system and a welding machine circuit, wherein the no-load protection circuit is connected with the power supply circuit, the power supply circuit is connected with the welding machine circuit, the fan system is connected with the power supply circuit, a transformer T3, a bridge type rectifier stack IC3, a filter capacitor C6 and a direct current motor M are arranged inside the fan system, the secondary terminal of the transformer T3 is connected with the input terminal of the bridge type rectifier stack IC3, and the output terminal of the bridge type rectifier stack IC3 is connected with the filter capacitor C6 and the direct current motor M in parallel; a power supply transformer T1, a rectifier diode D1, a rectifier D2, a power supply chip IC1, a voltage regulator tube VS, a capacitor C2, an inductance L1, a capacitor C5 and a potentiometer RP1 are arranged in the power supply circuit. The alternating current welding machine disclosed by the invention can realize no-load protection on the welding machine, and the fan system is designed, so that the fan system can effectively dissipate heat of the alternating current welding machine.

Description

A kind of A.C. welder designed based on coordinated signals

Technical field

The present invention relates to the field such as material science and technology, welding machine technology, is that one kind is designed based on coordinated signals specifically A.C. welder.

Background technology

Welding machine is exactly the electrical equipment of the power supply for providing certain characteristic for welding, is welded due to flexible simple and convenient solid and reliable, Even each industrial circle, such as Aero-Space, ship, automobile, container are widely used in after welding with the advantage of mother metal equality strength Deng.

Electric welding machine (electric welding machine) actually has the transformer for declining external characteristics, will 220V and 380V alternating currents are changed into the direct current of low pressure, and electric welding machine typically can be divided into two kinds by out-put supply species, and one kind is to hand over Stream power supply；One kind is galvanic.The electric welding machine of direct current is it may be said that be also a powerful rectifier, point both positive and negative polarity is handed over During stream electricity input, Jing after transformer transformation, then by rectifier rectification, then output has the power supply for declining external characteristics, output end Huge voltage change can be produced when switching on and off, ignite electric arc in instantaneous short circuit at the two poles of the earth, using produce electric arc come Consumable electrode and wlding, cooling reached later the purpose for combining them.The characteristics of welding transformer has itself, external characteristics is just It is voltage drastically declines after welding rod ignites characteristic.

The critical piece of electric welding machine is a step-down transformer, and the two ends of secondary coil are welded part and welding rod, work As when ignite electric arc, welding rod is fused in the gap of workpiece in the high temperature of electric arc.Because the iron core of welding transformer has certainly The characteristics of body, therefore the characteristic drastically declined with voltage, i.e., voltage declines after welding rod ignites；In the short circuit of welding rod adhesion When, voltage even more drastically declines.

In welding operation, although the electric current in circuit is equal everywhere, but because resistance everywhere is different, do not fixing Resistance maximum (this resistance is contact resistance) of contact position, according to the fuel factor law (being also Joule's law) of electric current, i.e. Q= IR.t understands：When electric current is equal, then the bigger position heating of resistance is higher, therefore in welding, the contact of welding rod is namely The contact resistance of the contact position of the metallic object for being connect is maximum, then the electric heating for producing at this position is naturally also just most, welds in addition Bar is the relatively low alloy of fusing point, naturally easily fusing.Alloy electrode core after fusing is bonded on welded article body, after cooling just Welding object is bonded in one piece.

The content of the invention

It is an object of the invention to provide a kind of A.C. welder designed based on coordinated signals, can realize electric welding machine No-load protection, when carrying out no-load protective circuit and powering, is designed using the voltage stabilizing chip based on adjustable type, can be according to difference Need the regulation for carrying out direct current supply voltage, reach it is adjustable carry out DC voltage supply, carry out rectification circuit arrange when, base In full-wave rectification design, the raising power factor that can be automated, it is to avoid the situation of voltage waste occur, so as to reach energy-saving ring The purpose of guarantor；Design simultaneously is exported based on rectifier rectification, and the blower fan system of capacitor filtering output so that blower fan system The A.C. welder can effectively be radiated, it is to avoid because the situation that is bad and affecting whole machine operation that radiates occurs.

The present invention is achieved through the following technical solutions：A kind of A.C. welder designed based on coordinated signals, arranges free Protection circuit, power-supplying circuit, blower fan system and welder circuit are carried, the no-load protective circuit is connected with power-supplying circuit Connect, power-supplying circuit is connected with welder circuit, blower fan system connection power-supplying circuit is arranged in the blower fan system There are transformer T3, rectifier IC3, filter capacitor C6 and direct current generator M, the secondary end connection bridge-type of the transformer T3 is whole The input of stream heap IC3, output end the parallel filtering electric capacity C6 and direct current generator M of rectifier IC3；Power in the power supply Power transformer T1, commutation diode D1, commutation diode D2, power supply chip IC1, voltage-stabiliser tube VS, electric capacity are provided with circuit C2, inductance L1, electric capacity C5 and potentiometer RP1, the two ends of the secondary end W2 of power transformer T1 pass through respectively commutation diode D1 Be connected with commutation diode D2 with 1 pin of power supply chip IC1,3 pin and 5 pin of power supply chip IC1 connect altogether and with secondary end W2 Centre tap connect and be grounded, 3 pin of power supply chip IC1 are also connected by voltage-stabiliser tube VS with 2 pin of power supply chip IC1, Electric capacity C2, inductance L1, electric capacity C5 connect and compose LC π type filter circuits, and the input of LC π type filter circuits is connected to power supply core Between 2 pin and 3 pin of piece IC1, the output end of LC π type filter circuits is connected with no-load protective circuit, and potentiometer RP1 is connected in parallel on In the output end of LC π type filter circuits, and the adjustable end of potentiometer RP1 is connected with 4 pin of power supply chip IC1；Power supply transformation The primary side W1 of device T1 for power-supplying circuit input, and primary side W1 is connected with welder circuit, and secondary end W1 is also It is in parallel with the primary side of transformer T3.

Further is that the present invention is better achieved, especially using following setting structures：The filter capacitor C6 is using electricity Solution electric capacity, and the positive pole of filter capacitor C6 connects the positive pole of direct current generator M, the negative pole of the commutation diode D1 and the pole of rectification two The negative pole of pipe D2 is all connected with 1 pin of power supply chip IC1, and the negative pole of voltage-stabiliser tube VS connects 2 pin of power supply chip IC1.

Further is that the present invention is better achieved, especially using following setting structures：Also include that being connected to power supply powers Switch protecting circuit on the input of circuit, the switch protecting circuit includes ganged switch QS and protective tube FU, and double Connection switch QS it is each on a protective tube FU is all set, protective tube FU is arranged on ganged switch QS with power-supplying circuit Between input.

Further is that the present invention is better achieved, especially using following setting structures：In the no-load protective circuit The current detection control circuit and delay control circuit being connected with each other is provided with, resistance R7, electricity are provided with delay control circuit Hold C3, electric capacity C4, when base chip IC 2, relay K and A.C. contactor KM；The moving contact K1 of A.C. contactor KM and relay K It is in series and is arranged on the input of power-supplying circuit, the moving contact K2 of relay K is arranged on transformer T3 primary sides On one end, and moving contact K2 controls the on/off of transformer T3 primary sides；The first end of resistance R7 respectively with LC π type filtered electricals 4 pin and 8 pin of the timely base chip IC 2 of first end of the output end on road are connected, and second end of resistance R7 is respectively with electric capacity C3's First end is connected with current detection control circuit, second end of electric capacity C3 respectively with current detection control circuit, electric capacity C4 1 pin of the timely base chip IC 2 in the second end is connected, when base chip IC 26 pin and 7 pin connect altogether and with the second end phase of resistance R7 Connection, when base chip IC 26 pin connect the first end of electric capacity C4, when base chip IC 22 pin connection current detection control circuit, When relay K is arranged between 3 pin and 1 pin of base chip IC 2.

Further is that the present invention is better achieved, especially using following setting structures：The electric capacity C3 is using electrolysis electricity Hold, and the positive pole of electric capacity C3 connects second end of resistance R7.

Further is that the present invention is better achieved, especially using following setting structures：In current detecting control electricity Current transformer TA, diode VD1, diode VD2, diode VD3, resistance R2, resistance R3, resistance R4, electricity are provided with road Resistance R5, resistance R6, transistor V1 and transistor V2, the current transformer TA is connected with welder circuit sensing, and diode VD1 is simultaneously It is associated on current transformer TA, resistance R2, diode VD2, diode VD3 and diode VD1 are sequentially connected, and diode VD22 The termination connect altogether with diode VD3 is connected by resistance R3 with the base stage of transistor V1, diode VD1 and diode VD3's Connects end altogether connects the base stage of transistor V1 by resistance R4, and resistance R4 is connected in parallel on the emitter junction of transistor V1；Transistor V1 Colelctor electrode connected by resistance R5 LC π type filter circuits output end first end, the colelctor electrode of transistor V1 passes through resistance R6 connects the base stage of transistor V2, and 2 pin of base chip IC 2 when the colelctor electrode of transistor V1 connects, the emitter stage of transistor V2 connects Second end of connecting resistance R7,1 pin of base chip IC 2 and ground connection when the colelctor electrode of transistor V2 connects.

Further is that the present invention is better achieved, especially using following setting structures：The positive pole of the diode VD1 connects The negative pole of diode VD3 is connect, the negative pole of diode VD2 connects the positive pole of diode VD3, and transistor V1 adopts NPN triode, brilliant Body pipe V2 adopts PNP triode.

Further is that the present invention is better achieved, especially using following setting structures：The diode VD1 and diode VD2 all adopts light emitting diode.

Further is that the present invention is better achieved, especially using following setting structures：Arrange in the welder circuit There are potentiometer RP2, electric capacity C1 and welder transformer T2, electric capacity C1 is connected in parallel between the adjustable end of potentiometer and the second fixing end, The normally open contact KM1 of A.C. contactor KM is connected in parallel on potentiometer RP2 two ends, the end that A.C. contactor KM connects with moving contact K1 non-co- Head is connected with first fixing end of potentiometer RP2, the second fixing end connection welder transformer T2 primary side W3 of potentiometer RP2 The second end, the termination that moving contact K1 connects with A.C. contactor KM non-co- is connected the first end of primary side W3, the Current Mutual Inductance Device TA is connected with the secondary end W4 sensings of welder transformer T2.

Further is that the present invention is better achieved, especially using following setting structures：The power supply chip IC1 is adopted LM2596 series voltage stabilizing chips, the electric capacity C2 is the input of LC π type filter circuits, and the electric capacity C5 is LC π type filtered electricals The output end on road.

The present invention compared with prior art, with advantages below and beneficial effect：

The present invention can realize the no-load protection of electric welding machine, when carrying out no-load protective circuit and powering, using based on adjustable The voltage stabilizing chip of type and design, can be needed to carry out the regulation of direct current supply voltage according to difference, reaching adjustable carries out direct current Voltage is supplied, and when rectification circuit setting is carried out, is designed based on full-wave rectification, the raising power factor that can be automated, it is to avoid There is the situation that voltage is wasted, so as to reach the purpose of energy-conserving and environment-protective；Design simultaneously is exported based on rectifier rectification, and electricity The blower fan system of capacitor filter output so that blower fan system can effectively be radiated to the A.C. welder, it is to avoid due to dissipating The situation generation that heat is bad and affects whole machine to run.

The present invention accesses moving contact K2 when electric welding machine stops welding in blower fan system, and in energy-saving protective state when, Synchronously blower fan system power-off is realized, so that blower fan system can also be at energy-saving run state, so as to reach the purpose of energy-conservation.

The present invention can realize the no-load protection of electric welding machine, be carried out by arranging current detection control circuit butt welding machine circuit Detection, determines if to be still in working condition, and enters line delay with reference to delay control circuit, after more than delay time, Whole electric welding machine automatically carries out power-off energy saving protection, has the effect of energy-conservation while reaching safe welding.

The present invention carry out current detection control circuit design when, using light emitting diode can Real Time Observation its whether locate In the state of normal operation.

The present invention is used cooperatively by A.C. contactor and relay, can while playing empty load energy-saving and protecting, The control of high current is carried out using small current, the purpose of security control is reached.

Base chip when the present invention is based on and the delay control circuit that designs can be carried out under the control condition of high sensitivity Delays time to control.

Description of the drawings

Fig. 1 is the electrical block diagram of the present invention.

Specific embodiment

The present invention is described in further detail with reference to embodiment, but embodiments of the present invention not limited to this.

Embodiment 1：

A kind of A.C. welder designed based on coordinated signals, can realize the no-load protection of electric welding machine, carry out zero load When protection circuit is powered, designed using the voltage stabilizing chip based on adjustable type, can be needed to carry out direct current supply electricity according to difference The regulation of pressure, reach it is adjustable carry out DC voltage supply, carry out rectification circuit arrange when, based on full-wave rectification design, energy The raising power factor of enough automations, it is to avoid the situation of voltage waste occur, so as to reach the purpose of energy-conserving and environment-protective；Design simultaneously Exported based on rectifier rectification, and the blower fan system of capacitor filtering output so that blower fan system can be to the exchange electric welding Machine is effectively radiated, it is to avoid because the situation that is bad and affecting whole machine operation that radiates occurs, as shown in figure 1, especially adopting Following setting structures：It is provided with no-load protective circuit, power-supplying circuit, blower fan system and welder circuit, the no-load protection Circuit is connected with power-supplying circuit, and power-supplying circuit is connected with welder circuit, and blower fan system connection power supply is powered electricity Road, is provided with transformer T3, rectifier IC3, filter capacitor C6 and direct current generator M, the change in the blower fan system The secondary end of depressor T3 connects the input of rectifier IC3, the output end parallel filtering electric capacity C6 of rectifier IC3 and Direct current generator M；Power transformer T1, commutation diode D1, commutation diode D2, electricity are provided with the power-supplying circuit Source chip IC1, voltage-stabiliser tube VS, electric capacity C2, inductance L1, electric capacity C5 and potentiometer RP1, the two of the secondary end W2 of power transformer T1 End is connected respectively by commutation diode D1 and commutation diode D2 with 1 pin of power supply chip IC1,3 pin of power supply chip IC1 Connect altogether with 5 pin and be connected and be grounded with the centre tap of secondary end W2,3 pin of power supply chip IC1 are also by voltage-stabiliser tube VS and electricity 2 pin of source chip IC1 are connected, and electric capacity C2, inductance L1, electric capacity C5 connect and compose LC π type filter circuits, and LC π type filtered electricals The input on road is connected between 2 pin of power supply chip IC1 and 3 pin, the output end and no-load protective circuit of LC π type filter circuits It is connected, potentiometer RP1 is connected in parallel in the output end of LC π type filter circuits, and adjustable end and the power supply chip of potentiometer RP1 4 pin of IC1 are connected；The primary side W1 of power transformer T1 for power-supplying circuit input, and primary side W1 and welding machine Circuit is connected, and secondary end W1 is also in parallel with the primary side of transformer T3.

Embodiment 2：

The present embodiment is further optimized on the basis of above-described embodiment, further for the present invention is better achieved, As shown in figure 1, especially adopting following setting structures：The filter capacitor C6 adopts electrochemical capacitor, and the positive pole of filter capacitor C6 The positive pole of connection direct current generator M, the negative pole of the commutation diode D1 and the negative pole of commutation diode D2 all with power supply chip IC1 1 pin be connected, the negative pole of voltage-stabiliser tube VS connects 2 pin of power supply chip IC1.

Embodiment 3：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：Also include that the switch being connected on the input of power-supplying circuit is protected Protection circuit, the switch protecting circuit include ganged switch QS and protective tube FU, and ganged switch QS it is each on all set A protective tube FU is put, protective tube FU is arranged between ganged switch QS and the input of power-supplying circuit.

Embodiment 4：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：The electric current inspection being connected with each other is provided with the no-load protective circuit Survey control circuit and delay control circuit, be provided with delay control circuit resistance R7, electric capacity C3, electric capacity C4, when base chip IC2, relay K and A.C. contactor KM；The moving contact K1 of A.C. contactor KM and relay K is in series and is arranged on power supply and supplies On the input of circuit, the moving contact K2 of relay K is arranged on one end of transformer T3 primary sides, and moving contact K2 is controlled The on/off of transformer T3 primary sides；The first end of resistance R7 respectively with the first end of the output end of LC π type filter circuits and When base chip IC 24 pin and 8 pin be connected, second end of resistance R7 controls respectively with the first end and current detecting of electric capacity C3 Circuit is connected, second end of electric capacity C3 respectively with the timely base chip IC 2 in the second end of current detection control circuit, electric capacity C4 1 pin is connected, when base chip IC 26 pin and 7 pin connect altogether and be connected with second end of resistance R7, when base chip IC 26 pin The first end of connection electric capacity C4, when base chip IC 22 pin connection current detection control circuit, base chip when relay K is arranged on Between 3 pin and 1 pin of IC2；Preferably, when arranging, the end that moving contact K2 and moving contact K1 are connected with A.C. contactor KM It is arranged on the two ends of A.C. contactor KM.

Embodiment 5：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：The electric capacity C3 adopts electrochemical capacitor, and the positive pole connection electricity of electric capacity C3 Second end of resistance R7.

Embodiment 6：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：Be provided with the current detection control circuit current transformer TA, Diode VD1, diode VD2, diode VD3, resistance R2, resistance R3, resistance R4, resistance R5, resistance R6, transistor V1 and crystalline substance Body pipe V2, the current transformer TA are connected with welder circuit sensing, and diode VD1 is connected in parallel on current transformer TA, resistance R2, diode VD2, diode VD3 and diode VD1 are sequentially connected, and the termination that diode VD22 and diode VD3 connects altogether leads to Cross resistance R3 to be connected with the base stage of transistor V1, diode VD1 is connected crystal with the connects end altogether of diode VD3 by resistance R4 The base stage of pipe V1, and resistance R4 is connected in parallel on the emitter junction of transistor V1；The colelctor electrode of transistor V1 connects LC π by resistance R5 The first end of the output end of type filter circuit, the colelctor electrode of transistor V1 connects the base stage of transistor V2, crystal by resistance R6 2 pin of base chip IC 2 when the colelctor electrode of pipe V1 connects, the emitter stage of transistor V2 connects second end of resistance R7, transistor V2 Colelctor electrode 1 pin of base chip IC 2 and ground connection when connecting.

Embodiment 7：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：The negative pole of the cathode connecting diode VD3 of the diode VD1, two poles The negative pole of pipe VD2 connects the positive pole of diode VD3, and transistor V1 adopts NPN triode, transistor V2 to adopt PNP triode.

Embodiment 8：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：The diode VD1 and diode VD2 all adopt light emitting diode.

Embodiment 9：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：Potentiometer RP2, electric capacity C1 and weldering are provided with the welder circuit Machine transformer T2, electric capacity C1 are connected in parallel between the adjustable end of potentiometer and the second fixing end, the normally open contact of A.C. contactor KM KM1 is connected in parallel on potentiometer RP2 two ends, and the termination that A.C. contactor KM connects with moving contact K1 non-co- is consolidated with the first of potentiometer RP2 Fixed end is connected, and second fixing end of potentiometer RP2 connects second end of welder transformer T2 primary side W3, moving contact K1 and friendship The termination that stream contactor KM non-co- connects connects the first end of primary side W3, and the current transformer TA and welder transformer T2's is secondary Level end W4 sensing connections.

Embodiment 10：

The present embodiment is further optimized on the basis of any of the above-described embodiment, and further is that this is better achieved It is bright, as shown in figure 1, especially adopting following setting structures：The power supply chip IC1 is described using LM2596 series voltage stabilizing chips Electric capacity C2 is the input of LC π type filter circuits, and the electric capacity C5 is the output end of LC π type filter circuits.

When design is used, the secondary end of welder transformer T2 is connected into respectively electrode holder A and weldment B, connect ganged switch QS, the normally open contact KM1 for exchanging 380V voltages (or alternating current 220V voltage) Jing A.C. contactors KM all the way adds to welder transformer On first winding (primary side) W3 of T2；Another road Jing power transformers T1 step-downs, commutation diode D1, commutation diode D2 are complete Ripple rectification, power supply chip IC1, voltage-stabiliser tube VS and potentiometer RP1 voltage stabilizings are adjusted, and after electric capacity C2, inductance L1 and electric capacity C5 filtering, are Transistor V1, transistor V2 and Shi Ji chip IC 2 provide direct-current working volts.

At electric welder no-load (unwelded), non-inductive electric current in current transformer TA, at transistor V1 and transistor V2 In cut-off state, when base chip IC 2 (base chip when preferably adopting NE555) 2 pin for high potential, when base chip IC 23 pin Output low level, relay K and A.C. contactor KM is in release conditions, and the normally open contact KM1 of A.C. contactor KM disconnects, electricity In holding C1, the potentiometer RP2 primary circuit (primary side W3) for accessing welder transformer T2 in parallel, electric welding machine is set to enter no-load saving State.

When soldered, the welding rod on electrode holder A is touched with weldment B, makes A.C. contactor TA produce induced-current, magnetic induction electricity Flow through resistance R2 current limlitings, make transistor V1 and transistor V2 conductings after diode VD2 rectifications, when base chip IC 22 pin be changed into low Level, when base chip IC 23 pin output high level, relay K and A.C. contactor KM energization adhesives, A.C. contactor KM's Normally open contact KM1 is short-circuit by potentiometer RP2 and electric capacity C1, and electric welding machine enters normal weld state.

To prevent KM frequent movements in electric welding machine intermittently operated, circuit to be provided with delays time to control function.When welding is stopped, Transistor V1 and transistor V2 ends, and electric capacity C3 is charged by resistance R7, is only charged to setting level in electric capacity C3 both end voltages When (preferably 8V), when base chip IC 23 pin just export low level, make relay K and A.C. contactor KM power-off release, Electric welding machine just proceeds to stand-by energy-saving state.

When in use, it is synchronous to cause dynamic touching due to relay K power-off release when electric welding machine proceeds to stand-by energy-saving state Head K2 also disconnects, and so as to reach power supply, phase transformer T3 is not powered, and then realizes that blower fan system power-off does not work, so as to reality The purpose of existing energy-conservation.

When in use, preferred resistance R7 can be replaced using potentiometer, when the resistance or change electric capacity that change resistance R7 The capacity of C3, can change the length of delay time.

The above, is only presently preferred embodiments of the present invention, not does any pro forma restriction to the present invention, it is every according to According to any simple modification, equivalent variations that the technical spirit of the present invention is made to above example, the protection of the present invention is each fallen within Within the scope of.

Claims (10)

1. it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：It is provided with no-load protective circuit, power supply to power Circuit, blower fan system and welder circuit, the no-load protective circuit is connected with power-supplying circuit, power-supplying circuit with weldering Electromechanical road is connected, blower fan system connection power-supplying circuit, and transformer T3, bridge rectifier are provided with the blower fan system Heap IC3, filter capacitor C6 and direct current generator M, the secondary end of the transformer T3 connects the input of rectifier IC3, bridge Output end the parallel filtering electric capacity C6 and direct current generator M of formula rectistack IC3；Power supply change is provided with the power-supplying circuit Depressor T1, commutation diode D1, commutation diode D2, power supply chip IC1, voltage-stabiliser tube VS, electric capacity C2, inductance L1, electric capacity C5 and The two ends of the secondary end W2 of potentiometer RP1, power transformer T1 are respectively by commutation diode D1 and commutation diode D2 and electricity 1 pin of source chip IC1 is connected, and 3 pin and 5 pin of power supply chip IC1 connect altogether and are connected and connect with the centre tap of secondary end W2 Ground, 3 pin of power supply chip IC1 are also connected by voltage-stabiliser tube VS with 2 pin of power supply chip IC1, electric capacity C2, inductance L1, electric capacity C5 connects and composes LC π type filter circuits, and the input of LC π type filter circuits be connected to power supply chip IC1 2 pin and 3 pin it Between, the output end of LC π type filter circuits is connected with no-load protective circuit, and potentiometer RP1 is connected in parallel on the defeated of LC π type filter circuits Go out on end, and the adjustable end of potentiometer RP1 is connected with 4 pin of power supply chip IC1；The primary side W1 of power transformer T1 is electricity The input of source power supply circuits, and primary side W1 is connected with welder circuit, and secondary end W1 also with the primary side of transformer T3 It is in parallel.

2. it is according to claim 1 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：The filtering Electric capacity C6 adopts electrochemical capacitor, and the positive pole of filter capacitor C6 connects the positive pole of direct current generator M, and the commutation diode D1's is negative The negative pole of pole and commutation diode D2 is all connected with 1 pin of power supply chip IC1, the negative pole connection power supply chip of voltage-stabiliser tube VS 2 pin of IC1.

3. it is according to claim 1 and 2 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：Also wrap Include the switch protecting circuit being connected on the input of power-supplying circuit, the switch protecting circuit include ganged switch QS and Protective tube FU, and ganged switch QS it is each on a protective tube FU is all set, protective tube FU is arranged on ganged switch QS And the input of power-supplying circuit between.

4. it is according to claim 1 and 2 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：Institute State and the current detection control circuit and delay control circuit being connected with each other is provided with no-load protective circuit, in delay control circuit Be provided with resistance R7, electric capacity C3, electric capacity C4, when base chip IC 2, relay K and A.C. contactor KM；A.C. contactor KM with after The moving contact K1 of electrical equipment K is in series and is arranged on the input of power-supplying circuit, and the moving contact K2 of relay K is arranged on change On one end of depressor T3 primary sides, and moving contact K2 controls the on/off of transformer T3 primary sides；The first end of resistance R7 point It is not connected with 4 pin and 8 pin of the timely base chip IC 2 of first end of the output end of LC π type filter circuits, second end of resistance R7 Be connected with the first end and current detection control circuit of electric capacity C3 respectively, second end of electric capacity C3 respectively with current detecting control Circuit, 1 pin of the timely base chip IC 2 in the second end of electric capacity C4 are connected, when base chip IC 26 pin and 7 pin connect altogether and and resistance Second end of R7 is connected, when base chip IC 26 pin connect the first end of electric capacity C4, when base chip IC 22 pin connection electric current Detection control circuit, when relay K is arranged between 3 pin and 1 pin of base chip IC 2.

5. it is according to claim 4 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：The electric capacity C3 adopts electrochemical capacitor, and the positive pole of electric capacity C3 connects second end of resistance R7.

6. it is according to claim 4 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：In the electricity Current transformer TA, diode VD1, diode VD2, diode VD3, resistance R2, resistance are provided with stream detection control circuit R3, resistance R4, resistance R5, resistance R6, transistor V1 and transistor V2, the current transformer TA connects with welder circuit sensing Connect, diode VD1 is connected in parallel on current transformer TA, resistance R2, diode VD2, diode VD3 and diode VD1 sequentially phase Connect, and the termination that diode VD22 connects altogether with diode VD3 is connected by resistance R3 with the base stage of transistor V1, diode VD1 is connected the base stage of transistor V1 with the connects end altogether of diode VD3 by resistance R4, and resistance R4 is connected in parallel on sending out for transistor V1 Penetrate and tie；The colelctor electrode of transistor V1 connects the first end of the output end of LC π type filter circuits by resistance R5, transistor V1's Colelctor electrode connects the base stage of transistor V2 by resistance R6,2 pin of base chip IC 2, crystal when the colelctor electrode of transistor V1 connects The emitter stage of pipe V2 connects second end of resistance R7,1 pin of base chip IC 2 and ground connection when the colelctor electrode of transistor V2 connects.

7. it is according to claim 6 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：Two pole The negative pole of the cathode connecting diode VD3 of pipe VD1, the negative pole of diode VD2 connects the positive pole of diode VD3, and transistor V1 is adopted With NPN triode, transistor V2 adopts PNP triode.

8. according to claim 6 or 7 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：It is described Diode VD1 and diode VD2 all adopt light emitting diode.

9. it is according to claim 4 it is a kind of based on coordinated signals design A.C. welder, it is characterised in that：In the weldering Potentiometer RP2, electric capacity C1 and welder transformer T2 are provided with electromechanical road, electric capacity C1 is connected in parallel on the adjustable end and second of potentiometer Between fixing end, the normally open contact KM1 of A.C. contactor KM is connected in parallel on potentiometer RP2 two ends, A.C. contactor KM and moving contact The termination that K1 non-co- connects is connected with first fixing end of potentiometer RP2, the second fixing end connection welding machine transformation of potentiometer RP2 Second end of device T2 primary side W3, the termination that moving contact K1 connects with A.C. contactor KM non-co- is connected the first end of primary side W3, The current transformer TA is connected with the secondary end W4 sensings of welder transformer T2.

10. according to claim 1, a kind of A.C. welder designed based on coordinated signals described in 2,5-7,9 any one, it is special Levy and be：The power supply chip IC1 is the input of LC π type filter circuits using LM2596 series voltage stabilizing chips, the electric capacity C2 End, the electric capacity C5 is the output end of LC π type filter circuits.