Thread: Mig star Welder

hi Mate;

Just a question , why do you need 250 Amp + , if it's going to be used for odd jobs around the house ? also why not go for an Inverter MIG instead of 3 phase , 3 phase tend to suck a lot of power when in use , Do you have 3 -phase power hooked up ?

have a looksie in here ...

150 Amp Inverter MIG & Stick Welder

Hi Mate

You know my theory bigger is better: p

I do have 3 phase at home in the work shop what does inverter mean I don’t know anything about welders nor do I know how to weld, well its be ages since I welded last

Originally Posted by HAK

Hi Mate

You know my theory bigger is better: p

I do have 3 phase at home in the work shop what does inverter mean I don’t know anything about welders nor do I know how to weld, well its be ages since I welded last

Basically All welders transform high voltage, low amperage primary power into low voltage, high amperage power used for welding. The welders do this using a transformer, which is an iron core wrapped with hundreds of turns of copper wire.

Variables that determine the physical size of the transformer include the number of turns of wire, the cross-sectional area of the core, the voltage being applied, and frequency of the primary power.

The key variable that inverters address is frequency. This equation that governs the design of a welder states that increasing the frequency of the primary power allows reducing the size and mass of the transformer.

Inverter technology increases the frequency of the primary power reaching the transformer from 60 Hz up to 20,000 Hz to 100,000 Hz. It does this through the on/off action of high power solid-state switches called IGBTs that turn on or off in as little as one millionth of a second.
The on/off action creates ac power, except at a very high frequency and with a rectangular ac waveform.

By controlling power on the primary or line side of the transformer and boosting frequency, lightweight welding equipment is now produced.



People encountering an inverter for the first time usually cannot believe that such a small machine provides so much welding output. For example, small Stick/TIG inverters weigh less than 6.35 Kg, but have enough power to weld with a 3.18-mm Stick electrode. Even an inverter for carbon arc gouging with 9.53-meter carbons at 600A weighs only about 54.43 Kg.

Inverters also provide outstanding power efficiency, which can lower utility bills, and make good use of the primary power being supplied, which is known as good power factor. Good power factor lowers amperage draw, which may enable adding more welders to existing primary power.


Hope that answers your question

Gees. Anyone would think that Disco_owner had done a TAFE course.

Hi Hak,
It looks like you've changed your username AGAIN.

Good to see that you're still around.

Best Wishes,
Peter

Originally Posted by Bushwanderer

Gees. Anyone would think that Disco_owner had done a TAFE course.

Hi Peter ; when are you Enrolling ?

hahahaha yeah I know he gets carried away ah

here I am wanting a 200+amp welder nad the wife come home with ozito bunnings job 90Amp little Mig

I bow my head in shame the wife detected that I wasnt all that impressed with the Ozito 90amp welder for my B'day any way the wife decided we take the welder back to bunning and take a visit to the BOC welding shop she returned the $300 unit and bought me a 200 amp Boc welder Mag Mate Pro $1500 Geeez she a great Wife, I wouldnt put up with me