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  1. #1
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    inverter welder schematic

    hi everybody
    i build an arc inverter welder.
    input voltage is 220 volts
    output voltage is 20 volts
    output current is 160 ampres

    regards.

  2. #2
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    welding inverter schematic

    Friend,
    I found your project very interesting, but it has details of components that are unreadable .
    You can pass more details of this project ?
    Or a detailed drawing more?


    8 members found this post helpful.

  3. #3
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    welding inverter circuit

    Hi,
    Very interesting schematic ! could you please share some details about how should be made the windings (copper wire section, what ferite core)?


    8 members found this post helpful.

    •   Alt18th February 2008, 06:03

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  4. #4
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    inverter welder circuit

    i also want to build a smps welding inverter , i found this schematic (scroll to the end of document)

    sorry , my internet connection in very weak right now, i'll be back.

    Added after 26 minutes:

    ok, i took a look at the circuit in the first post, and i have some question for you guys:
    First of all, the converter's topology is "forward", but that topology need only one tranzistor(i mean, one switch device) and the positiv rail permanently connected to transformmer. In this ciruit both rails are switched on and off to the transformer. Why? I have seen that at my circuit too(i will upload it soon, is a industrial staff).
    2. how does the controll circuit prevent core saturation? or it requested a air gap core?


    5 members found this post helpful.

  5. #5
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    welding inverter schematics

    this is what i talking about


    6 members found this post helpful.

  6. #6
    FvM
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    arc welder schematic

    The two (multiple) switches are series connected, they are electrically equivalent to a single switch. The series circuit reduces the switch voltage. This seems strange at first look, cause a voltage doubling rectifier is used at the same time, but there may be also a 230V circuit version of the tool.

    Having also DC current at the secondary, the forward topology is probably better suited than the push-pull circuit presented at start of the thread. Saturation could happen anyway depending on operating condition, but primary current is limited through current transformer and the control circuit. But a small air gap would simplify the operation, I think.

    Operating frequency and semiconductor types would be interesting in addition, but the circuit is instructive anyway.


    3 members found this post helpful.

  7. #7
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    inverter welder schematics

    The two (multiple) switches are series connected, they are electrically equivalent to a single switch. The series circuit reduces the switch voltage.
    That would be great, because i found some IGBT-s with 1200V C-E voltage. But i'm not pretty sure about that, i think that system is for some protection along with the diodes. Maybe someboby konws and have experience whit these inverters and tell us what is the "couse".
    push-pull circuit presented at start of the thread
    excuseme, but that is farward too.


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  8. #8
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    inverter schematics

    I'm interested too is there a way to isolate it from the mains


    2 members found this post helpful.

    •   Alt31st March 2008, 00:19

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  9. #9
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    inverter welding schematic

    But all the schematics presented here have the outputs isolated from the mains using a ferrite transformer. :D


    4 members found this post helpful.

  10. #10
    FvM
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    dc welder schematic

    Yes, the original circuit has actually the same series topology. I was somewhat confused by the draing style and didn't examine it in detail. Also the voltage annotation is confusing, the DC bus voltage is around 300V as with the INVERTEC circuit.

    The series connected switchers have another purpose, that I didn't understand at first look. It allows free-wheeling to the bus voltage through diodes without an auxilary winding and with effectively no inductive overvoltage. With a single switch, you need an ausxilary winding at the primary or secondary side. Due to stray inductances, the Vds respectively Vce peak voltage is always higher than 2 Vbus. With an 1200V IGBT, you may need a Z-diode active clamping circuit to cut inductive overvoltage at e. g. 700 or 800 V, but that's a usual circuit and should work in this application.


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    •   Alt31st March 2008, 07:01

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  11. #11
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    inverter welding circuit

    Pls Do


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  12. #12
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    arc welder schematics

    i need switdh mode arc welder machine use microcontroller type number and datasheet

    Added after 4 minutes:

    i need to invertor sudura.pdf of the use microcontroller type number it did not write shematic diagram you give microcontoller type number i be very happy
    thanks



  13. #13
    FvM
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    welder inverter circuit

    Obviously, IC2 isn't a microcontroller. It's an analog IC or hybrid circuit, possibly custom made. I didn't recognize a particular known SMPS controller from the schematics.


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  14. #14
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    welding machine schematic

    yes the two igbt's in series will lower the voltage between the two


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    welder schematic

    Very interesting schematic !



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    dc inverter arc welding schematic

    i guess this thing is possible with normal VFD drive (variable frequency drive). Coz u have all min components in one module n just ferrite core n a rectifier is left only.....................................please do correct me if i made some mistake.


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  17. #17
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    welder inverter schematic

    hi
    i am looking for a circuit diagram of switch mode dc/dc inverter whit 48 volt input and 220 volt sin wave out put and 5000 watt
    if you have or know where from i can find it pleas help me
    tanh you


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  18. #18
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    inverter welder circuits

    :cry:

    Added after 19 minutes:

    :cry::cry:'""Iam looking for a circuit diagram of switch mode dc/dc inverter with 220 volt input and 15 - 50 volts out put, center tap system, and 500- 1000 ampheres , this's email-ynnugraha@gmail.com, YANA from Indonesia, your bestfriend
    if you have know where from i can find it please help me
    tank you.
    :cry::cry::cry:


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  19. #19
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    igbt welder schematic

    Hi, I have seen inverter welder schematics, but this was in Russian.
    So I just translated using google translator. Hope some one may find it useful.

    http://translate.google.com/translat...sw.htm&prev=hp

    Regards
    John



  20. #20
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    arc welder circuit diagram

    this great idea,but not easy to build it.the current it's huge.if we not care about this our wire will melt


    3 members found this post helpful.

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