CN203933436U - A kind of power driving circuit of single inversion large power stud welding machine - Google Patents
A kind of power driving circuit of single inversion large power stud welding machine Download PDFInfo
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- CN203933436U CN203933436U CN201420340587.6U CN201420340587U CN203933436U CN 203933436 U CN203933436 U CN 203933436U CN 201420340587 U CN201420340587 U CN 201420340587U CN 203933436 U CN203933436 U CN 203933436U
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Abstract
The utility model discloses a kind of power driving circuit of single inversion large power stud welding machine, described power supply comprises the inverter circuit with four brachium pontis, and four brachium pontis of described inverter circuit form by N inverse switch pipe in parallel; Described power driving circuit comprises the first drive circuit for the each inverse switch pipe of brachium pontis under brachium pontis, the second half-bridge on independent driving inverter circuit the first half-bridge, for driving separately under inverter circuit the first half-bridge the second drive circuit of the each inverse switch pipe of brachium pontis on brachium pontis, the second half-bridge, and send the inversion pulse-generating circuit of inversion pulse signal to described first, second drive circuit; The first described drive circuit includes with the second drive circuit the DC power supply, driving tube module, the N driving transformer that are connected successively.The utility model not only can be realized the steady operation of single inversion large power stud welding machine, and can reduce the failure rate of welding machine electric power, has improved welding machine quality.
Description
Technical field
The utility model relates to a kind of power driving circuit of single inversion large power stud welding machine, belongs to stud welding machine technical field.
Background technology
Stud welding is exactly by metallic stud or welding method that similarly other metal fastenings (bolt, nail etc.) vertical welding gets on to another workpiece (being generally plate), stud welding can be saved drilling and tapping replacement and is threaded or rivets, and oneself is widely used in the industries such as automobile, shipbuilding, locomotive, aviation.
The stud welding machine that oneself knows has two large classes, one class is the energy-storage type double screw-bolt welding machine of electric capacity as welding power, its advantage is can be with little electric current as 220V power for illumination, electric energy is stored in to (J=CV2/2 in capacitor fast, J is energy joule, C is capacitance F, V is tank voltage), then produce point discharge by control system and welding gun by means of the small salient point of double-screw bolt self, form the even electric arc of up to ten thousand amperes of thousands of amperes of moment, metal between double-screw bolt and mother metal is melted rapidly, and under the elastic force pressure of welding gun, both are linked together, form welding point, welding process is l～3 millisecond only, can not cause burning variable color, can not be out of shape, but because melting zone is very shallow, only 0.1mm, be only suitable for being no more than 3mm and not being subject in mother metal thickness the instrument of bearing load, household electrical appliances, ornament, the stud welding of cabinet stainless steel products.Another kind of is the drawn arc stud welding machine of transformer as welding power, it welds as power supply using arc welding rectifier, its advantage is on thickness exceedes the sheet material of 3mm, to weld bearing type double-screw bolt more than 8mm, the electric arc of this class welding machine is by welding gun, double-screw bolt and mother metal short circuit also to be promoted and formed rapidly, so much bigger (A=D × 100 of the common covered-electrode welding of current ratio of welding, D is double-screw bolt diameter) generally as long as several one hundred ampere to thousands of amperes, therefore the welding transformer of welding machine and external power capacity must be enough large, certainly will increase like this weight and volume of product, and that inversion stud welding machine has power output is large, volume is little, the advantage such as lightweight, become the major product of arc pulling type arc stud welding.
But existing high power contravariant stud welding machine (as carbon arc gas welding, submerged-arc welding, arc stud welding) is all 2 or 3 inversion systems to be combined.Its total current in parallel and discrete inversion system are difficult for regulating, and many inversion systems work together easy phase mutual interference and have that manufactured parts is many, complex manufacturing, production efficiency are low, bulky, the weight problem such as still heavier, failure rate is high so that still there is bottleneck in the application of inversion stud welding machine.
Summary of the invention
The problems referred to above that exist for prior art, the purpose of this utility model is to provide a kind of power driving circuit of single inversion large power stud welding machine, realizes the steady operation of single inversion large power stud welding machine.
To achieve these goals, the utility model adopts following technical scheme:
A power driving circuit for single inversion large power stud welding machine, described power supply comprises the inverter circuit with four brachium pontis, four brachium pontis of described inverter circuit form by N inverse switch pipe in parallel, it is characterized in that: described power driving circuit comprises the first drive circuit for the each inverse switch pipe of brachium pontis under brachium pontis, the second half-bridge on independent driving inverter circuit the first half-bridge, for driving separately under inverter circuit the first half-bridge the second drive circuit of the each inverse switch pipe of brachium pontis on brachium pontis, the second half-bridge, and send the inversion pulse-generating circuit of inversion pulse signal to described first, second drive circuit, the first described drive circuit includes with the second drive circuit the DC power supply, driving tube module, the N driving transformer that are connected successively, described driving transformer has an armature winding and two secondary winding, the output of described driving tube module is connected with the armature winding of N driving transformer respectively, driving transformer secondary winding Same Name of Ends in the first drive circuit, different name end respectively with inverter circuit in brachium pontis on the first half-bridge, inverse switch pipe under the second half-bridge in brachium pontis is connected, driving transformer secondary winding Same Name of Ends in the second drive circuit, different name end respectively with inverter circuit in brachium pontis on the second half-bridge, inverse switch pipe under the first half-bridge in brachium pontis is connected, one end of described driving transformer armature winding is connected to capacitance in parallel and resistance.
The utility model also has following further improvement:
1, described driving tube module is the full-bridge inverting drive circuit being made up of 4 driving tubes.
2, described driving tube is any one in field effect transistor, triode, IGBT pipe.
3, described driving tube module is integrated drive chips.
4, the finite both control ZVZCS-PWM full-bridge waveform that described inversion pulse-generating circuit is made up of loop Current-type PWM Controller and time-base circuit.
5, power driving circuit according to claim 1, is characterized in that: described N is greater than 1 natural number, and each switching tube has driving transformer correspondence.
Compared with prior art, the utlity model has following beneficial effect:
The utility model designs by driving transformer, can realize the inverse switch pipe in all inverter circuits is driven separately, and do not interfere with each other, belong to the suffered triggering waveform of the inverse switch pipe of same group the same, can not affect because of one of them inverse switch pipe fault the normal work of other inverse switch pipe.Therefore this drive circuit has not only been realized the steady operation of single inversion large power stud welding machine, and has reduced the failure rate of welding machine electric power, has improved product quality.
Brief description of the drawings
Fig. 1 is the structural representation of the inverter circuit of a kind of single inversion large power stud welding machine of providing of the utility model.
Fig. 2 is the electrical schematic diagram of the first drive circuit described in the utility model.
Fig. 3 is the electrical schematic diagram of the second drive circuit described in the utility model.
Fig. 4 is the triggering signal sequential chart described in the utility model.
Fig. 5 is the circuit theory diagrams of the inversion pulse-generating circuit described in the utility model.
Embodiment
For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with accompanying drawing, the technical scheme in the utility model embodiment is clearly and completely described.
Fig. 1 is the structural representation of the inverter circuit of a kind of single inversion large power stud welding machine of providing of the utility model, as shown in Figure 1, inverter circuit in described power supply is the full bridge inverter with four brachium pontis, four brachium pontis form by 3 inverse switch pipes in parallel, but switching tube several, each switching tube has driving transformer correspondence, first group of inverse switch pipe G1, G3, G5 and the 4th group of inverse switch pipe G8, G10, G12 forms the first half-bridge, second group of inverse switch pipe G2, G4, G6 and the 3rd group of inverse switch pipe G7, G9, G11 forms the second half-bridge.The drive circuit of the present embodiment drives for these inverse switch pipes exactly, thereby realizes the normal work of inverter circuit.
As Fig. 2, shown in Fig. 3, the power driving circuit that the present embodiment provides comprises: for brachium pontis inverse switch pipe G1 on inverter circuit the first half-bridge shown in independent driving Fig. 1, G3, G5, inverse switch pipe G2 in brachium pontis under the second half-bridge, G4, the first drive circuit (as Fig. 2) of G6, for driving separately brachium pontis inverse switch pipe G8 under inverter circuit the first half-bridge, G10, G12, inverse switch pipe G7 in brachium pontis on the second half-bridge, G9, the second drive circuit (as Fig. 3) of G11, and to first, the second drive circuit sends the inversion pulse-generating circuit (seeing Fig. 4) of inversion pulse signal, the first drive circuit is identical with the structure of the second drive circuit, taking the first drive circuit shown in Fig. 2 as example, this drive circuit comprises successively the DC power supply (V+, V-) that connects, driving tube module, 3 driving transformer T2, T3, T4, each driving transformer has an armature winding and two secondary winding, and the output of driving tube module is connected with the armature winding of 3 driving transformer T2, T3, T4 respectively, taking driving transformer T2 as example, one end of armature winding is connected to capacitance C15 in parallel and resistance R 15, brachium pontis inverse switch pipe G1 on the first half-bridge in secondary winding termination inverter circuit of the same name, inverse switch pipe G2 in brachium pontis under different name termination the second half-bridge.The armature winding of corresponding driving transformer T3, T4 is connected to respectively capacitance C16 in parallel and resistance R 16, capacitance C17 and resistance R 17 in parallel, secondary winding Same Name of Ends meets respectively inverse switch pipe G3, G5, and different name end meets respectively inverse switch pipe G4, G6.For driving transformer T5, T6, the T7 of the second drive circuit, its armature winding is connected to capacitance C18 in parallel and resistance R 18, capacitance C19 and resistance R 19 in parallel, capacitance C20 and resistance R 20 in parallel, secondary winding termination inverse switch of the same name pipe G7, G9, G11, different name termination inverse switch pipe G8, G10, G12.Driving transformer magnetic core is ferrite and amorphous, also T2, T3, T4 (Fig. 2), T5, T6, T7 (Fig. 3) can be made respectively to two transformers, but secondary separating, each secondary switching tube that connects.In Fig. 2, Fig. 3, VF1-VF8 is driving tube, play the effect that drives driving transformer T2-T7, the driving tube using in the present embodiment is effect pipe, also can replace by triode or little electric current I GBT pipe belt, drive circuit also can drive with integrated drivings such as multiple EXB840 series, M57957 series or with optocoupler, but must be each separately, each inverse switch pipe G1-G12 and drive circuit drive separately.As shown in FIG., RG1-RG12 is the control electrode resistance of inverse switch pipe G1-G12, and R7-R14 is the controlling resistance of driving tube VF1-VF8, and a, b, c, d are the triggering signals of inversion pulse-generating circuit (Fig. 5) interlocking of sending.The interlocking signal of sending, but must separate by each control utmost point, multichip integrated circuit or optocoupler drive separately each inverse switch pipe G1-G12.In experiment if by each switch controlled utmost point not separately, if adopt the direct RG resistance Parallel Control utmost point in parallel of driver, if there is a switch to have problem, collector electrode with control utmost point short circuit, whole group of switching tube all can all be blown up by controlled stage voltage height; Control separately after utmost point driving and adopt to separate, collector electrode and the short circuit of the control utmost point, be own fault, switching tube of artificial damage, and other does not also affect, and welding machine can be protected, and reaches design effect.
Figure 4 shows that triggering signal sequential chart, as seen from Figure 4: when a and d trigger, b and c are zero; In the time that a has triggering, driving tube VF1, VF4 conducting, driving tube VF2, VF3 cut-off, drives first group of inverse switch pipe G1, G3, G5 open-minded; When d has triggering, driving tube VF6, VF7 conducting, driving tube VF5, VF8 cut-off, drives the 4th group of inverse switch pipe G8, G10, G12 open-minded; Principal current is by G1, G3, G5, G8, G10, G12 generation current, when a and d have triggered the Dead Time by tf; B and c start to trigger, and a, d are that zero, c triggers the 3rd group of inverse switch pipe G7, G9, G11 are open-minded, b triggers second group of inversion G2, G4, G6 is open-minded, principal current is by G7, G9, G11, G2, G4, G6 generation current, and after b and c have triggered, by tf Dead Time, a and b trigger again.Trigger rate is 18KHZ-60KHZ.
As shown in Figure 5, the finite both control ZVZCS-PWM full-bridge impulse waveform that described inversion pulse-generating circuit can be made up of loop Current-type PWM Controller and time-base circuit.Triggering signal can be coordinated by chip UC3846 and chip NE556, when No. 11 pins and No. 14 pins of UC3846 are exported leading arm signal, lagging leg is by NE556 time delay, the leading arm waveform of broadening, turn-off and realize finite both control waveform ZVZCS-PWM waveform (seeing Fig. 3) by No. 10 pins of UC3846, a b c d also can be used in conjunction with UC3846 and CD4013, also can produce pwm signal by MCU, DSP, FBGA.
Finally be necessary described herein: foregoing is only for being described in further detail the technical solution of the utility model; can not be interpreted as the restriction to the utility model protection range, some nonessential improvement that those skilled in the art makes according to foregoing of the present utility model and adjustment all belong to protection range of the present utility model.
Claims (6)
1. a power driving circuit for single inversion large power stud welding machine, described power supply comprises the inverter circuit with four brachium pontis, four brachium pontis of described inverter circuit form by N inverse switch pipe in parallel, it is characterized in that: described power driving circuit comprises the first drive circuit for the each inverse switch pipe of brachium pontis under brachium pontis, the second half-bridge on independent driving inverter circuit the first half-bridge, for driving separately under inverter circuit the first half-bridge the second drive circuit of the each inverse switch pipe of brachium pontis on brachium pontis, the second half-bridge, and send the inversion pulse-generating circuit of inversion pulse signal to described first, second drive circuit, the first described drive circuit includes with the second drive circuit the DC power supply, driving tube module, the N driving transformer that are connected successively, described driving transformer has an armature winding and two secondary winding, the output of described driving tube module is connected with the armature winding of N driving transformer respectively, driving transformer secondary winding Same Name of Ends in the first drive circuit, different name end respectively with inverter circuit in brachium pontis on the first half-bridge, inverse switch pipe under the second half-bridge in brachium pontis is connected, driving transformer secondary winding Same Name of Ends in the second drive circuit, different name end respectively with inverter circuit in brachium pontis on the second half-bridge, inverse switch pipe under the first half-bridge in brachium pontis is connected, one end of described driving transformer armature winding is connected to capacitance in parallel and resistance.
2. the power driving circuit of single inversion large power stud welding machine according to claim 1, is characterized in that: described driving tube module is the full-bridge inverting drive circuit being made up of 4 driving tubes.
3. the power driving circuit of single inversion large power stud welding machine according to claim 2, is characterized in that: described driving tube is any one in field effect transistor, triode, IGBT pipe.
4. the power driving circuit of single inversion large power stud welding machine according to claim 1, is characterized in that: described driving tube module is integrated drive chips.
5. the power driving circuit of single inversion large power stud welding machine according to claim 1, is characterized in that: the finite both control ZVZCS-PWM full-bridge waveform that described inversion pulse-generating circuit is made up of loop Current-type PWM Controller and time-base circuit.
6. the power driving circuit of single inversion large power stud welding machine according to claim 1, is characterized in that: described N is greater than 1 natural number, and each switching tube has driving transformer correspondence.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420340587.6U CN203933436U (en) | 2014-06-24 | 2014-06-24 | A kind of power driving circuit of single inversion large power stud welding machine |
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| CN201420340587.6U CN203933436U (en) | 2014-06-24 | 2014-06-24 | A kind of power driving circuit of single inversion large power stud welding machine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667281A (en) * | 2018-07-09 | 2018-10-16 | 珠海格力电器股份有限公司 | Half-bridge drive circuit, chip and air-conditioning |
| CN111684694A (en) * | 2018-10-29 | 2020-09-18 | 深圳配天智能技术研究院有限公司 | Drive circuit and switching power supply |
| CN113437762A (en) * | 2021-07-30 | 2021-09-24 | 易事特集团股份有限公司 | Photovoltaic inverter power system |
-
2014
- 2014-06-24 CN CN201420340587.6U patent/CN203933436U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108667281A (en) * | 2018-07-09 | 2018-10-16 | 珠海格力电器股份有限公司 | Half-bridge drive circuit, chip and air-conditioning |
| CN111684694A (en) * | 2018-10-29 | 2020-09-18 | 深圳配天智能技术研究院有限公司 | Drive circuit and switching power supply |
| CN113437762A (en) * | 2021-07-30 | 2021-09-24 | 易事特集团股份有限公司 | Photovoltaic inverter power system |
| CN113437762B (en) * | 2021-07-30 | 2023-11-03 | 易事特集团股份有限公司 | Photovoltaic inverter power system |
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