CN205520013U - Be applied to drive circuit of CO2 contravariant welding machine - Google Patents
Be applied to drive circuit of CO2 contravariant welding machine Download PDFInfo
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- CN205520013U CN205520013U CN201620225047.2U CN201620225047U CN205520013U CN 205520013 U CN205520013 U CN 205520013U CN 201620225047 U CN201620225047 U CN 201620225047U CN 205520013 U CN205520013 U CN 205520013U
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Abstract
The utility model discloses a be applied to drive circuit of CO2 contravariant welding machine, including main circuit, frequency dividing circuit, electric buffer circuit, drive signal circuit, the main circuit is full bridge inverter, the main circuit is equipped with the ICBT transistor, the IGBIT transistor is provided with the main switch pipe, the main switch pipe is provided with a drive switching tube V1, the 2nd drive switching tube V2, the 3rd drive switching tube V3, fourth drive switching tube V4, frequency dividing circuit guarantees the switch tube break -make is complementary, electric buffer circuit realizes keeping apart between strong, the light current, reduces mutual interference between DSP output and the drive circuit, acquire IGBT transistor reliable turn -off and the gate driving signal who switches on the drive signal circuit. Beneficial effect for prior art is, adopts above -mentioned scheme, the utility model discloses can design simply on the way, it is with low costs, have higher price / performance ratio, the different occasions that can adapt to the welding machine.
Description
Technical field
This utility model relates to electric and electronic technical field, refers more particularly to one and is applied to CO2The drive circuit of inverter type welder.
Background technology
CO2Inverter type welder have that volume is little, light quality, efficiency high and the response advantage such as rapidly and be widely used.IGBT is the core parts of this inverter type welder, and its break-make controls quality and directly determines that the overall performance of welding machine plays.Inverter type welder workplace is harsh, drive IGBT and have higher requirement.General IGBT drive circuit tends not to adapt to welding machine occasion, needs to analyze its drive circuit voluntarily and design；Therefore prior art existing defects, needs to improve.
Utility model content
Technical problem to be solved in the utility model is to provide one and is applied to CO2The drive circuit of inverter type welder.
For achieving the above object, this utility model be have employed following technical scheme: one is applied to CO2The drive circuit of inverter type welder, including main circuit, frequency dividing circuit, electrical isolation circuit, drive signal circuit；Described main circuit is full bridge inverter；Described main circuit is provided with igbt transistor；Described igbt transistor is provided with main switch；Described main switch is provided with the first driving switching tube V1, the second driving switching tube V2, the 3rd driving switching tube V3, the 4th driving switching tube V4；Described first drives switching tube V1 to drive switching tube V4 to constitute first to brachium pontis with the described 4th；Described second drives switching tube V2 to drive switching tube V3 to constitute second to brachium pontis with the described 3rd；Described frequency dividing circuit ensures that described switching tube break-make is complementary；Isolate between described electrical isolation circuit realiration strong, weak electricity, reduce and interfere between DSP output and drive circuit；Obtain the described drive signal circuit of the gate drive signal of described igbt transistor reliable turn-off and conducting.
Preferably, described frequency dividing circuit is to ensure that switching tube break-make described in described first pair of brachium pontis and described second pair of brachium pontis is complementary, and leaves certain Dead Time, prevents described first pair of brachium pontis and described second pair of bridge arm direct pass from forming power supply short circuit；Described frequency dividing circuit module is provided with AND circuit module and trigger；Described AND circuit module is CD4081 components and parts；Described trigger is CD4027 components and parts.
Preferably, described trigger is provided with outfan Q1, outfan, input K1, input J1;Described outfan Q1 feeds back to described input K1;Described outfan feeds back to described input J1, the pwm signal of the 40KHz exported by DSP is added to the clock CLOCK end of described trigger, produce the first pulse signal and second pulse signal of two-way opposite in phase, described first pulse signal, the second pulse signal are carried out and computing with the output pulse of described DSP, obtain the pwm signal of 20KHz, drive described first to drive switching tube V1, the second driving switching tube V2.
Preferably, described electrical isolation circuit is provided with photoelectrical coupler, the push-pull circuit of energy drive signal level, and the outfan of described photoelectrical coupler is connected with described push-pull circuit.
Preferably, described drive signal circuit is provided with pulse transformer, and the primary side of described pulse transformer accesses in the H-shaped electric bridge being made up of switching tube, and described electric bridge is provided with switch transistor T 1, switch transistor T 2, switch transistor T 3, switch transistor T 4;Described switch transistor T 1 and described switch transistor T 3 use P-channel switching tube, use IRF9530；Described switch transistor T 2 and described switch transistor T 4 use N-channel switching tube, use IRF640, and described N-channel switching tube uses common drain connection.
Preferably, described pulse transformer secondary side output signal is connected with electric capacity, plays pressure stabilization function, and the series-parallel circuit of diode and resistance is to shorten level conversion time, improves the dynamic property of system.
Preferably, described igbt transistor is provided with gate drive voltage, and described gate drive voltage is the biggest, and on-state voltage drop and turn-on consumption can reduce.
Providing the benefit that relative to prior art, use such scheme, this utility model can design simple in road, and low cost has higher cost performance；Can adapt to the different occasions of welding machine.
Accompanying drawing explanation
Fig. 1 inverter circuit main circuit diagram；
The preferable trigger waveform of Fig. 2 switching tube；
Fig. 3 frequency dividing circuit figure；
Fig. 4 electrical isolation circuit diagram；
Fig. 5 drive signal circuit figure.
Detailed description of the invention
For the ease of understanding this utility model, below in conjunction with the accompanying drawings and specific embodiment, this utility model is described in detail.Accompanying drawing gives preferred embodiment of the present utility model.But, this utility model can realize in many different forms, however it is not limited to the embodiment described by this specification.On the contrary, providing the purpose of these embodiments is to make the understanding to disclosure of the present utility model more thorough comprehensively.
It should be noted that be referred to as " being fixed on " another element when element, it can be directly on another element or can also there is element placed in the middle.When an element is considered as " connection " another element, and it can be directly to another element or may be simultaneously present centering elements.The term that this specification is used " is fixed ", " one-body molded ", "left", "right" and similar statement for illustrative purposes only.
Unless otherwise defined, all of technology that this specification is used and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model are generally understood that.This specification is intended merely to describe the purpose of specific embodiment at term used in the description of the present utility model, is not intended to limit this utility model.
As it is shown in figure 1, an embodiment of the present utility model is: one is applied to CO2The drive circuit of inverter type welder, including main circuit, frequency dividing circuit, electrical isolation circuit, drive signal circuit；Described main circuit is full bridge inverter；Described main circuit is provided with igbt transistor；Described igbt transistor rated operational voltage 1200V, rated current 100A；Described igbt transistor is provided with main switch；Described main switch is provided with the first driving switching tube V1, the second driving switching tube V2, the 3rd driving switching tube V3, the 4th driving switching tube V4；Described first drives switching tube V1 to drive switching tube V4 to constitute first to brachium pontis with the described 4th；Described second drives switching tube V2 to drive switching tube V3 to constitute second to brachium pontis with the described 3rd；Described first drives switching tube V1 and the described 4th to drive switching tube V4 to simultaneously turn on, described first pair of brachium pontis and described second pair of each conducting of brachium pontis 180 degree；The brachium pontis that brachium pontis is paired is simultaneously turned on by described first pair of brachium pontis second, two pairs replace 180 degree of electric currents of each conducting and drive switching tube V1 through first, when switching tube VT1 ends, electric current in inductance L continues circulation, and induce negative under positive voltage, power to the load through diode VD1, two half-bridge circuits combine to electric capacity C charging simultaneously.VT1 and VT4 is a pair, VT2 and VT3 is that another is right, and paired brachium pontis simultaneously turns on, two pairs of alternately each conductings 180 degree, VT2 turn on, the t1 moment to VT2 cut-off signals, to VT1 Continuity signal, but inductive load current can not suddenly change, so VD2 turns on afterflow, when t3 moment io is down to zero, VD2 ends, VT2 turns on, and io starts reversely.Equally, in the t4 moment to VT2 cut-off signals, after VT1 Continuity signal, VT2 turns off, and VD1 first turns on afterflow, and t5 moment V1 just turns on.During VT1 or VT2 conducting, io and uo is equidirectional, and direct current side loading provides energy.When VD1 or VD2 turns on, io and uo is reverse, and the energy storage in inductance is fed back to DC side, and VD1, VD2 are referred to as feedback diode, also play io continuous print effect, also known as fly-wheel diode.
Preferably, described frequency dividing circuit is to ensure that switching tube break-make described in described first pair of brachium pontis and described second pair of brachium pontis is complementary, and leaves certain Dead Time, prevents described first pair of brachium pontis and described second pair of bridge arm direct pass from forming power supply short circuit；Described frequency dividing circuit module is provided with AND circuit module and trigger；Described AND circuit module is CD4081 components and parts；Described trigger is CD4027 components and parts.
Preferably, described trigger is provided with outfan Q1, outfan, input K1, input J1;Described outfan Q1 feeds back to described input K1;Described outfan feeds back to described input J1, the pwm signal of the 40KHz exported by DSP is added to the clock CLOCK end of described trigger, produce the first pulse signal and second pulse signal of two-way opposite in phase, described first pulse signal, the second pulse signal are carried out and computing with the output pulse of described DSP, obtain the pwm signal of 20KHz, drive described first to drive switching tube V1, the second driving switching tube V2.
Preferably, described electrical isolation circuit is provided with photoelectrical coupler, the push-pull circuit of energy drive signal level, and the outfan of described photoelectrical coupler is connected with described push-pull circuit.
Preferably, described drive signal circuit is provided with pulse transformer, and the primary side of described pulse transformer accesses in the H-shaped electric bridge being made up of switching tube, and described electric bridge is provided with switch transistor T 1, switch transistor T 2, switch transistor T 3, switch transistor T 4;Described switch transistor T 1 and described switch transistor T 3 use P-channel switching tube, use IRF9530；Described switch transistor T 2 and described switch transistor T 4 use N-channel switching tube, use IRF640, and described N-channel switching tube uses common drain connection.
Preferably, described pulse transformer secondary side output signal is connected with electric capacity, plays pressure stabilization function, and the series-parallel circuit of diode and resistance is to shorten level conversion time, improves the dynamic property of system.
Preferably, described igbt transistor is provided with gate drive voltage, and described gate drive voltage is the biggest, and on-state voltage drop and turn-on consumption can reduce.
Providing the benefit that relative to prior art, use such scheme, this utility model can design simple in road, and low cost has higher cost performance；Can adapt to the different occasions of welding machine.
It should be noted that above-mentioned each technical characteristic continues to be mutually combined, form various embodiments the most enumerated above, be accordingly to be regarded as the scope that this utility model description is recorded；Further, for those of ordinary skills, can be improved according to the above description or be converted, and all these modifications and variations all should be belonged to the protection domain of this utility model claims.
Claims (7)
1. one kind is applied to CO2The drive circuit of inverter type welder, it is characterised in that；Including main circuit, frequency dividing circuit, electrical isolation circuit, drive signal circuit；Described main circuit is full bridge inverter；Described main circuit is provided with igbt transistor；Described igbt transistor is provided with main switch；Described main switch is provided with the first driving switching tube V1, the second driving switching tube V2, the 3rd driving switching tube V3, the 4th driving switching tube V4；Described first drives switching tube V1 to drive switching tube V4 to constitute first to brachium pontis with the described 4th；Described second drives switching tube V2 to drive switching tube V3 to constitute second to brachium pontis with the described 3rd；Described frequency dividing circuit ensures that described switching tube break-make is complementary；Isolate between described electrical isolation circuit realiration strong, weak electricity, reduce and interfere between DSP output and drive circuit；Obtain the described drive signal circuit of the gate drive signal of described igbt transistor reliable turn-off and conducting.
2. it is applied to CO according to the one described in claim 12The drive circuit of inverter type welder, it is characterized in that: described frequency dividing circuit is to ensure that switching tube break-make described in described first pair of brachium pontis and described second pair of brachium pontis is complementary, and leave certain Dead Time, prevent described first pair of brachium pontis and described second pair of bridge arm direct pass from forming power supply short circuit；Described frequency dividing circuit module is provided with AND circuit module and trigger；Described AND circuit module is CD4081 components and parts；Described trigger is CD4027 components and parts.
3. it is applied to CO according to the one described in claim 22The drive circuit of inverter type welder, it is characterised in that；Described trigger is provided with outfan Q1, outfan, input K1, input J1;Described outfan Q1 feeds back to described input K1;Described outfan feeds back to described input J1, the pwm signal of the 40KHz exported by DSP is added to the clock CLOCK end of described trigger, produce the first pulse signal and second pulse signal of two-way opposite in phase, described first pulse signal, the second pulse signal are carried out and computing with the output pulse of described DSP, obtain the pwm signal of 20KHz, drive described first to drive switching tube V1, the second driving switching tube V2.
One the most according to claim 1 is applied to CO2The drive circuit of inverter type welder, it is characterised in that: described electrical isolation circuit is provided with photoelectrical coupler, the push-pull circuit of energy drive signal level, and the outfan of described photoelectrical coupler is connected with described push-pull circuit.
One the most according to claim 1 is applied to CO2The drive circuit of inverter type welder, it is characterized in that: described drive signal circuit is provided with pulse transformer, the primary side of described pulse transformer accesses in the H-shaped electric bridge being made up of switching tube, and described electric bridge is provided with switch transistor T 1, switch transistor T 2, switch transistor T 3, switch transistor T 4;Described switch transistor T 1 and described switch transistor T 3 use P-channel switching tube, use IRF9530；Described switch transistor T 2 and described switch transistor T 4 use N-channel switching tube, use IRF640, and described N-channel switching tube uses common drain connection.
One the most according to claim 5 is applied to CO2The drive circuit of inverter type welder, it is characterised in that described pulse transformer secondary side output signal is connected with electric capacity, plays pressure stabilization function, and the series-parallel circuit of diode and resistance is to shorten level conversion time, improves the dynamic property of system.
One the most according to claim 1 is applied to CO2The drive circuit of inverter type welder, it is characterised in that described igbt transistor is provided with gate drive voltage, and described gate drive voltage is the biggest, on-state voltage drop and turn-on consumption can reduce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620225047.2U CN205520013U (en) | 2016-03-23 | 2016-03-23 | Be applied to drive circuit of CO2 contravariant welding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620225047.2U CN205520013U (en) | 2016-03-23 | 2016-03-23 | Be applied to drive circuit of CO2 contravariant welding machine |
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| Publication Number | Publication Date |
|---|---|
| CN205520013U true CN205520013U (en) | 2016-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620225047.2U Expired - Fee Related CN205520013U (en) | 2016-03-23 | 2016-03-23 | Be applied to drive circuit of CO2 contravariant welding machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425034A (en) * | 2016-12-13 | 2017-02-22 | 许昌学院 | Method for wide input voltage of direct current inverter welding machine and wide input voltage circuit thereof |
-
2016
- 2016-03-23 CN CN201620225047.2U patent/CN205520013U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106425034A (en) * | 2016-12-13 | 2017-02-22 | 许昌学院 | Method for wide input voltage of direct current inverter welding machine and wide input voltage circuit thereof |
| CN106425034B (en) * | 2016-12-13 | 2020-11-20 | 许昌学院 | Wide input voltage circuit of direct current inverter welding machine |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170323 |
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| CF01 | Termination of patent right due to non-payment of annual fee |