CN103986321A - Arc welding power supply safe starting device and method - Google Patents
Arc welding power supply safe starting device and method Download PDFInfo
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- CN103986321A CN103986321A CN201410253431.9A CN201410253431A CN103986321A CN 103986321 A CN103986321 A CN 103986321A CN 201410253431 A CN201410253431 A CN 201410253431A CN 103986321 A CN103986321 A CN 103986321A
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Abstract
The invention discloses an arc welding power supply safe starting device and method. The arc welding power supply safe starting device comprises a fan and relay control circuit and a main loop starting control circuit, wherein the fan and relay control circuit is connected with the main loop starting control circuit, the fan and relay control circuit is connected with a fan and relay control circuit, the main loop starting control circuit is connected with an inverter main loop, and the fan and relay control circuit and the main loop starting control circuit are connected with an auxiliary power circuit, respectively. The method comprises the steps of after a first preset time is started by a current limiting power circuit in an arc welding power supply, triggering the fan and relay control circuit in the arc welding power supply to work; after a second preset time is started by the current limiting power circuit in the arc welding power supply, triggering the inverter main loop to start to work. With the adoption of the arc welding power supply safe starting device and method, before the main loop normally works during arc welding, functional modules of the arc welding power supply are successively opened according to a time sequence without mutual interference, and thus the purpose that the arc welding power supply starts to work safely and reliably is reached.
Description
Technical field
The present invention relates to welding technology field, relate in particular to a kind of device and method for Arc Welding Power clean boot.
Background technology
Welding machine is the visual plant in production and processing field, and inverter type welder is as the mainstream development direction of welding machine product, across multi-door subjects such as welding procedure, electric arc and power electronics, high-power soft starts power technology and has become now the studying technological domain of forefront in power electronics.Well-known arc welding is under high current conditions, and the produced heat that discharges during by ionized gas, melts welding rod and workpiece and make it after condensation, form weld seam.
Current Arc Welding Power starts, and especially Arc Welding Power is all direct startup.The moment that existing Arc Welding Power is starting, blower fan, IGBT (Insulated Gate Bipolar Transistor, insulated gate bipolar transistor) device such as inversion major loop is opened work simultaneously, cause Switching Power Supply power to provide not enough, further cause that Arc Welding Power cannot normally work, even cause that power device damages the phenomenons such as inefficacy.Meanwhile, when existing Arc Welding Power starts, each functional module is opened simultaneously, may interfere with each other and affects normal unlatching.The person skilled in this field is easy to ignore this problem, in fact this problem is extremely important for arc-welding field, as power supply is relied on to very strong arc welding, the clean boot of its power supply is not only being related to the problems such as equipment, components and parts, welding efficiency, energy conservation, is being related to especially the problems such as personal security of this field work.Technical scheme provided by the invention has solved above-mentioned technical barrier.
Summary of the invention
Based on this, the invention provides a kind of Arc Welding Power safety starting device, comprise that blower fan and control relay circuit and major loop start control circuit, described blower fan and control relay circuit connect described major loop and start control circuit, described blower fan and control relay circuit connect blower fan and the relay circuit in Arc Welding Power, described major loop starts control circuit and connects the inverter major loop in Arc Welding Power, and described blower fan and control relay circuit start with described major loop the auxiliary power circuit that control circuit is connected respectively current limliting power circuit rear class;
Described blower fan and control relay circuit, after starting the first Preset Time, trigger blower fan and relay circuit work in Arc Welding Power for the current limliting power circuit at Arc Welding Power;
Described major loop starts control circuit, after starting the second Preset Time, triggers the inverter major loop work in Arc Welding Power for the current limliting power circuit at Arc Welding Power; Wherein, described the second Preset Time is greater than described the first Preset Time.
As one of them embodiment, described blower fan and control relay circuit and major loop start control circuit, by the first diode, be connected, wherein the anode of the first diode is connected with major loop startup control circuit, and negative electrode is connected with blower fan and control relay circuit.
As one of them embodiment, described blower fan and control relay circuit are connected by triode with blower fan and relay circuit.
As one of them embodiment, described blower fan and control relay circuit comprise the first resistance and the first electric capacity, comparator, the second resistance, triode.
Described first resistance one end is connected with power supply, and the other end is connected with the normal phase input end of the first electric capacity and comparator; Described first electric capacity one end is connected with the first resistance and comparator normal phase input end, the output of described comparator is connected with the second resistance, described the first electric capacity other end ground connection, the described second resistance other end is connected with transistor base, described transistor collector is connected with blower fan and relay circuit, grounded emitter.
As one of them embodiment, described major loop starts control circuit and comprises the 3rd resistance and the second electric capacity, the 4th resistance, voltage-stabiliser tube.
Described the 3rd resistance one end is connected with power supply, the other end is connected with the 4th resistance with the second electric capacity, described the second electric capacity other end ground connection, described the 4th resistance other end is connected with voltage-stabiliser tube, and the other end of described voltage-stabiliser tube is connected with inverter major loop.
As one of them embodiment, the charging interval that first and second described Preset Time is first and second electric capacity.
Compare with traditional technology, the present invention is directed to the safety starting device that Arc Welding Power partly provides Arc Welding Power, by the blower fan in this device and control relay circuit, control the blower fan in blower fan and relay circuit, the operating state of relay; By the current limliting power circuit in the job control Arc Welding Power of relay, further by major loop, start control circuit control inverter major loop and work particularly.Before the normal work of inverter major loop, each functional circuit of Arc Welding Power priority unlatching chronologically, does not interfere with each other, thereby reaches the object of the safe and reliable unlatching work of Arc Welding Power.
Corresponding with said apparatus, the present invention also provides a kind of Arc Welding Power safe starting method, and the method comprises:
After current limliting power circuit in Arc Welding Power starts the first Preset Time, trigger blower fan and relay circuit work in Arc Welding Power;
After current limliting power circuit in Arc Welding Power starts the second Preset Time, trigger the inverter major loop work in Arc Welding Power.
Described the second Preset Time is greater than described the first Preset Time.
As one of them embodiment, after the current limliting power circuit in Arc Welding Power starts the first Preset Time, by the output of current limliting power circuit described in the Control of described blower fan and relay circuit.
As one of them embodiment, in the first described Preset Time, the power supply after described current limliting power circuit output current limiting, after the first described Preset Time, the power supply of described current limliting power circuit output inverter major loop need of work.
As one of them embodiment, first and second described Preset Time starts simultaneously.
Compare with traditional technology, the present invention is directed to Arc Welding Power provides a kind of method of Arc Welding Power clean boot, after starting the first Preset Time by the current limliting power circuit in Arc Welding Power particularly, trigger blower fan and relay circuit work in Arc Welding Power; Relay is further controlled the current limliting power circuit in Arc Welding Power, after the current limliting power circuit in Arc Welding Power starts the second Preset Time, triggers the inverter major loop work in Arc Welding Power.Before the normal work of inverter major loop, each functional circuit of Arc Welding Power priority unlatching chronologically, does not interfere with each other, thereby reaches the object of the safe and reliable unlatching work of Arc Welding Power.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of a preferred embodiment of Arc Welding Power safety starting device of the present invention.
Fig. 2 is current limliting circuit construction of electric power figure in Arc Welding Power.
Fig. 3 is the schematic flow sheet of Arc Welding Power safe starting method of the present invention.
Embodiment
For further setting forth the technological means that the present invention takes and the effect obtaining, below in conjunction with accompanying drawing and preferred embodiment, to technical scheme of the present invention, know and complete description.
Shown in figure 1,2, wherein Fig. 1 is the circuit structure diagram of a preferred embodiment of Arc Welding Power safety starting device of the present invention; Fig. 2 is current limliting circuit construction of electric power figure in Arc Welding Power.
The invention provides a kind of Arc Welding Power safety starting device 100, comprise that blower fan and control relay circuit 110 and major loop start control circuit 120, described blower fan and control relay circuit 110 connect described major loop and start control circuit 120, blower fan and relay circuit 130 that described blower fan and control relay circuit 110 connect in Arc Welding Power, described major loop starts the inverter major loop that control circuit 120 connects in Arc Welding Power, described blower fan and control relay circuit 110 start with described major loop the auxiliary power circuit 150 that control circuit 120 is connected respectively current limliting power circuit 140 rear classes in Arc Welding Power, described rear class auxiliary power circuit 150, for the power supply that current limliting power circuit 140 is exported, be converted to this and install the needed accessory power supply of 100 electronic devices and components work.
Described blower fan and control relay circuit 110, after auxiliary power circuit 150 startup the first Preset Times for the current limliting power circuit 140 at Arc Welding Power and rear class thereof, trigger blower fan and relay circuit 130 work in Arc Welding Power.
Described major loop starts control circuit 120, after auxiliary power circuit 150 startup the second Preset Times for the current limliting power circuit 140 at Arc Welding Power and rear class thereof, triggers the inverter major loop work in Arc Welding Power; Wherein, described the second Preset Time is greater than described the first Preset Time.
Described blower fan and relay circuit 130, comprise relay J, the second diode D
2and blower fan F, wherein said relay J, the second diode D
2and blower fan F three be connected in parallel after one end be connected with accessory power supply, the other end is connected with blower fan and control relay circuit 110.
Described Arc Welding Power is controlled by the relay in current limliting power circuit 140, when 3,4 contacts of the relay J in described current limliting power circuit 140 disconnect, for Arc Welding Power complete machine powering current-limited startup process, when described current limliting power circuit 140 repeat circuit J 3, during 4 closing of contact, described blower fan and relay circuit 130 work, complete machine powering current limliting process finishes, and described major loop starts control circuit 120 output control signal U
0, trigger inverter major loop startup work.
As one of them embodiment, described blower fan and control relay circuit 110 comprise the first resistance R
1with the first capacitor C
1, comparator U
1, the second resistance R
2, triode Q
1.
Described the first resistance R
1one end is connected with accessory power supply, the other end and the first capacitor C
1and comparator U
1normal phase input end be connected, described comparator U
1output and the second resistance R
2one end be connected, described the first capacitor C
1other end ground connection, described the second resistance R
2the other end and triode Q
1base stage is connected, described triode Q
1collector electrode is connected with blower fan and relay circuit 130, grounded emitter, described comparator U
1reverse input end connect reference voltage, described accessory power supply, the power supply of exporting for the auxiliary power circuit 150 being connected with current limliting power circuit 140.Described reference voltage is according to described the first resistance R
1with the first capacitor C
1the voltage of the parameter setting of the charge-discharge circuit forming is generally 3～10 volts.
According to above-mentioned blower fan and control relay circuit, can be by the R wherein arranging
1with C
1the R/C charge-discharge circuit forming, gives capacitor C
1charging, works as capacitor C
1voltage be greater than comparator U
1voltage time just can, control triode Q
1conducting state, further play the operating state of controlling follow-up blower fan and relay circuit, C
1the charging interval of electric capacity is above-mentioned the first Preset Time.This circuit design is simple, and components and parts all very common matching degree are high, and compatibility is also high.
As one of them embodiment, described major loop starts control circuit 120 and comprises the 3rd resistance R
3with the second capacitor C
2, the 4th resistance R
4, voltage-stabiliser tube ZD
1.
Described the 3rd resistance R
3one end is connected with power supply, the other end and the second capacitor C
2with the 4th resistance R
4be connected, described the second capacitor C
2other end ground connection, described the 4th resistance R
4the other end and voltage-stabiliser tube ZD
1be connected, described voltage-stabiliser tube ZD
1the other end be connected with inverter major loop.
According to above-mentioned major loop, start control circuit, can be by the R wherein arranging
3with C
2the R/C charge-discharge circuit forming, gives capacitor C
2charging, works as capacitor C
2voltage reach voltage-stabiliser tube ZD
1reverse breakdown voltage time, voltage-stabiliser tube ZD
1breakdown, major loop starts control circuit will export high level U
0, trigger inverter major loop startup work, C
2the charging interval of electric capacity is above-mentioned the second Preset Time.This circuit design is simple, and components and parts all very common matching degree are high, and compatibility is also high, and simple design just can realize control object.
As one of them embodiment, described blower fan and control relay circuit 110 start control circuit 120 with major loop, by the first diode D
1be connected, wherein the first diode D
1anode and major loop start control circuit 120 and be connected, negative electrode is connected with blower fan and control relay circuit 110.
Between described blower fan and control relay circuit and major loop startup control circuit, the first diode is set, for control described major loop before described triode conducting, start control circuit A point in low level state, now major loop starts the signal U of the output output of control circuit
0for low level, control inverter major loop and do not work, to guarantee that inverter major loop is not worked before blower fan and relay circuit conducting.
As one of them embodiment, described blower fan and control relay circuit 110 pass through triode Q with blower fan and relay circuit 130
1be connected.
Between described blower fan and control relay circuit and blower fan and relay circuit, triode is set; for controlling the operating state of blower fan, relay; particularly when transistor base is high level; triode conducting; blower fan, relay startup work; be arranged in addition described blower fan and the second diode in relay circuit for filtering the reverse potential producing when relay is worked, for the protection of triode.
Further, first and second described Preset Time is the first capacitor C
1, the second capacitor C
2charging interval, described first, second Preset Time, preferably realizes by the time that discharges and recharges of electric capacity in R/C charge-discharge circuit, wherein, first, second described electric capacity is preferably polarity electrochemical capacitor.
As shown in Figure 2, the current-limiting resistance TH arranging in the current limliting power circuit 140 in described Arc Welding Power
1, material is preferably thermistor or high-power cement resistor.
As one of them preferred embodiment, the specific implementation process of device 100 of the present invention is as follows: when opening welding machine electric power, pass through current-limiting resistance TH
1arc-welding power circuit output accessory power supply VCC after starting.
In the blower fan shown in Fig. 1 and control relay circuit 110, accessory power supply VCC is by the first resistance R
1give the first capacitor C
1charge and be input to comparator U
1normal phase input end, comparator U
1inverting input input preset reference voltage Vref.When the first capacitor C
1upper charging voltage is during higher than Vref, comparator U
1output high level is by the second resistance R
2receive triode Q
1base stage, makes triode Q
1conducting; Q
1after conducting, blower fan and relay circuit 130 work, blower fan F, relay J startup work, now 3 of relay J, 4 contact adhesives, current-limiting resistance TH
1short circuit, the diode D being wherein connected in parallel with blower fan F, relay J in blower fan and relay circuit 130
2for filtering the reverse potential protection triode Q of relay
1.
In major loop startup control circuit 120 as shown in Figure 1, VCC is by the 3rd resistance R
3give the second capacitor C
2charging, and by the 4th resistance R
4receive the point of A shown in figure, A point is respectively by diode D
1receive the triode Q of blower fan and control relay circuit 110 parts
1base stage, and voltage-stabiliser tube ZD
1reverse input end, its forward output output control signal U
0, further control the operating state of inverter major loop.
As shown in Figure 1, at comparator U
1before output high level, A point current potential is always by diode D
1be placed in low level, now U
0export a low level control, inverter major loop is in off position.As comparator U
1during output high level, A point current potential is no longer subject to the restriction of blower fan and control relay circuit 110 parts, and when the second capacitor C
2charging voltage make voltage-stabiliser tube ZD
1u while puncturing
0export a high level and control inverter major loop unlatching work.The above is arc welding clean boot implementation procedure of the present invention.
The safety starting device of above-mentioned Arc Welding Power, controls the blower fan in blower fan and relay circuit, the operating state of relay by the blower fan in this device and control relay circuit; By the current limliting power circuit in the job control Arc Welding Power of relay, further by major loop, start control circuit control inverter major loop and work particularly.Before the normal work of inverter major loop, each functional circuit of Arc Welding Power priority unlatching chronologically, does not interfere with each other, thereby reaches the object of the safe and reliable unlatching work of Arc Welding Power.
As shown in Figure 3, Fig. 3 is the schematic flow sheet of Arc Welding Power safe starting method of the present invention.The present invention also provides a kind of Arc Welding Power safe starting method, and the method comprises the steps:
After the current limliting power circuit of S101 in Arc Welding Power starts the first Preset Time, trigger blower fan and relay circuit work in Arc Welding Power;
After the current limliting power circuit of S102 in Arc Welding Power starts the second Preset Time, trigger the inverter major loop work in Arc Welding Power;
Described the second Preset Time is greater than described the first Preset Time.
As one of them embodiment, after the current limliting power circuit in Arc Welding Power starts the first Preset Time, by the output of current limliting power circuit described in the Control of described blower fan and relay circuit.
As one of them embodiment, in the first described Preset Time, the power supply after described current limliting power circuit output current limiting, after the first described Preset Time, the power supply of described current limliting power circuit output inverter major loop need of work.
As one of them embodiment, first and second described Preset Time starts simultaneously.
As a preferred embodiment, Arc Welding Power safety starting device is as shown in Figure 1 that example is described Arc Welding Power safe starting method of the present invention.The specific works process of device 100 of the present invention is as follows:
When opening welding machine electric power, pass through current-limiting resistance TH
1arc-welding power circuit output accessory power supply VCC after starting.
In the blower fan shown in Fig. 1 and control relay circuit 110, accessory power supply VCC is by the first resistance R
1give the first capacitor C
1charge and be input to comparator U
1normal phase input end, comparator U
1inverting input input preset reference voltage Vref.When the first capacitor C
1upper charging voltage is during higher than Vref, comparator U
1output high level is by the second resistance R
2receive triode Q
1base stage, makes triode Q
1conducting; Q
1after conducting, blower fan and relay circuit 130 work, blower fan F, relay J startup work, now 3 of relay J, 4 contact adhesives, current-limiting resistance TH
1short circuit, the diode D being wherein connected in parallel with blower fan F, relay J in blower fan and relay circuit 130
2for filtering the reverse potential protection triode Q of relay
1.
In major loop startup control circuit 120 as shown in Figure 1, VCC is by the 3rd resistance R
3give the second capacitor C
2charging, and by the 4th resistance R
4receive the point of A shown in figure, A point is respectively by diode D
1receive the triode Q of blower fan and control relay circuit 110 parts
1base stage, and voltage-stabiliser tube ZD
1reverse input end, its forward output output control signal U
0, further control the operating state of inverter major loop.
As shown in Figure 1, at comparator U
1before output high level, A point current potential is always by diode D
1be placed in low level, now U
0export a low level control, inverter major loop is in off position.As comparator U
1during output high level, A point current potential is no longer subject to the restriction of blower fan and control relay circuit 110 parts, and when the second capacitor C
2charging voltage make voltage-stabiliser tube ZD
1u while puncturing
0export a high level and control inverter major loop unlatching work.The above is arc welding clean boot implementation procedure of the present invention.
The method of above-mentioned Arc Welding Power clean boot, after starting the first Preset Time, triggers blower fan and relay circuit work in Arc Welding Power by the current limliting power circuit in Arc Welding Power; Relay is further controlled the current limliting power circuit in Arc Welding Power, after the current limliting power circuit in Arc Welding Power starts the second Preset Time, triggers the inverter major loop work in Arc Welding Power.Before the normal work of inverter major loop, each functional circuit of Arc Welding Power priority unlatching chronologically, does not interfere with each other, thereby reaches the object of the safe and reliable unlatching work of Arc Welding Power.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. an Arc Welding Power safety starting device, it is characterized in that, comprise that blower fan and control relay circuit and major loop start control circuit, described blower fan and control relay circuit connect described major loop and start control circuit, described blower fan and control relay circuit connect blower fan and the relay circuit in Arc Welding Power, described major loop starts control circuit and connects the inverter major loop in Arc Welding Power, and described blower fan and control relay circuit start control circuit with described major loop and be connected respectively auxiliary power circuit;
Described blower fan and control relay circuit, after starting the first Preset Time, trigger blower fan and relay circuit work in Arc Welding Power for the current limliting power circuit at Arc Welding Power;
Described major loop starts control circuit, after starting the second Preset Time, triggers the inverter major loop work in Arc Welding Power for the current limliting power circuit at Arc Welding Power;
Wherein, described the second Preset Time is greater than described the first Preset Time.
2. Arc Welding Power safety starting device according to claim 1, is characterized in that, described blower fan and control relay circuit comprise the first resistance and the first electric capacity, comparator, the second resistance, triode;
Described first resistance one end is connected with accessory power supply, the other end is connected with the normal phase input end of the first electric capacity and comparator, the output of described comparator is connected with one end of the second resistance, described the first electric capacity other end ground connection, the described second resistance other end is connected with transistor base, described transistor collector is connected with blower fan and relay circuit, grounded emitter, the reverse input end of comparator connects reference voltage, and described accessory power supply is the power supply of described auxiliary power circuit output.
3. Arc Welding Power safety starting device according to claim 1, is characterized in that, described major loop starts control circuit and comprises the 3rd resistance and the second electric capacity, the 4th resistance, voltage-stabiliser tube;
Described the 3rd resistance one end is connected with accessory power supply, the other end is connected with the 4th resistance one end with the second electric capacity, described the second electric capacity other end ground connection, described the 4th resistance other end is connected with voltage-stabiliser tube, the other end of described voltage-stabiliser tube is connected with inverter major loop, and described accessory power supply is the power supply of described auxiliary power circuit output.
4. Arc Welding Power safety starting device according to claim 1, it is characterized in that, described blower fan and control relay circuit and major loop start control circuit, by the first diode, be connected, wherein the anode of the first diode is connected with major loop startup control circuit, and negative electrode is connected with blower fan and control relay circuit.
5. Arc Welding Power safety starting device according to claim 1, is characterized in that, described blower fan and control relay circuit are connected by triode with blower fan and relay circuit.
6. Arc Welding Power safety starting device according to claim 2, is characterized in that, described the first Preset Time is the charging interval of described the first electric capacity.
7. Arc Welding Power safety starting device according to claim 3, is characterized in that, described the second Preset Time is respectively the charging interval of described the second electric capacity.
8. an Arc Welding Power safe starting method, is characterized in that, comprises the following steps:
After current limliting power circuit in Arc Welding Power starts the first Preset Time, trigger blower fan and relay circuit work in Arc Welding Power;
After current limliting power circuit in Arc Welding Power starts the second Preset Time, trigger the inverter major loop work in Arc Welding Power;
Wherein, described the second Preset Time is greater than described the first Preset Time.
9. Arc Welding Power safe starting method according to claim 8, it is characterized in that, after current limliting power circuit in Arc Welding Power starts the first Preset Time, by the output of current limliting power circuit described in the Control of described blower fan and relay circuit.
10. Arc Welding Power safe starting method according to claim 8, is characterized in that, in the first described Preset Time, and the power supply after described current limliting power circuit output current limiting; After the first described Preset Time, the power supply of described current limliting power circuit output inverter major loop need of work.
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| Publication number | Publication date |
|---|---|
| CN103986321B (en) | 2016-07-13 |
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