SWITCH MODE ARC INVERTER WELDER SCHEMATIC

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cae20452

Joined: 17 Dec 2005
Posts: 17

01 Mar 2006 22:18 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.

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José Luis

Joined: 14 Feb 2003
Posts: 89
Helped: 7

02 Mar 2006 13:10 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?

dandumit

Joined: 11 Jun 2003
Posts: 10
Location: Romania

18 Feb 2008 7:03 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)?

copilu

Joined: 02 Feb 2008
Posts: 5

27 Mar 2008 1:55 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?

Last edited by copilu on 27 Mar 2008 15:01; edited 1 time in total

copilu

Joined: 02 Feb 2008
Posts: 5

27 Mar 2008 15:00 welding inverter schematics

this is what i talking about

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FvM

Joined: 22 Jan 2008
Posts: 5154
Helped: 766
Location: Bochum, Germany

27 Mar 2008 20:42 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.

copilu

Joined: 02 Feb 2008
Posts: 5

28 Mar 2008 9:35 inverter welder schematics

Quote:

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".

Quote:

push-pull circuit presented at start of the thread

excuseme, but that is farward too.

flail

Joined: 12 Jul 2007
Posts: 0

31 Mar 2008 0:19 inverter schematics

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

mister_rf

Joined: 27 Feb 2008
Posts: 243
Helped: 59
Location: Romania

31 Mar 2008 0:38 inverter welding schematic

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

FvM

Joined: 22 Jan 2008
Posts: 5154
Helped: 766
Location: Bochum, Germany

31 Mar 2008 7:01 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.

zawmintun1

Joined: 21 Nov 2007
Posts: 41

15 May 2008 10:00 inverter welding circuit

Pls Do

ibersoy2006

Joined: 16 May 2008
Posts: 1

17 May 2008 10:34 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

FvM

Joined: 22 Jan 2008
Posts: 5154
Helped: 766
Location: Bochum, Germany

17 May 2008 15:06 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.

dsv1486

Joined: 10 Jun 2008
Posts: 1

11 Jun 2008 15:25 welding machine schematic

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

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11 Jun 2008 15:25 Ads

tojsuja

Joined: 15 Jun 2008
Posts: 1

15 Jun 2008 11:38 welder schematic

Very interesting schematic !

ashish_hal

Joined: 10 Aug 2008
Posts: 2

10 Aug 2008 13:13 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.

beh220

Joined: 08 Sep 2008
Posts: 4

11 Sep 2008 20:02 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

yana

Joined: 14 May 2009
Posts: 1

14 May 2009 11:52 inverter welder circuits

Added after 19 minutes:

Crying or Very sad

'""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(at)gmail.com, YANA from Indonesia, your bestfriend
if you have know where from i can find it please help me
tank you.
Crying or Very sad

johnudt

Joined: 15 Dec 2008
Posts: 3

16 May 2009 20:25 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/translate?hl=en&sl=ru&tl=en&u=http://sg-sg.chat.ru/sg_sw.htm&prev=hp

Regards
John