I have been looking over the schematics of the Hobart mig welders found in their user manuals.
I notice that in addition to an inductor, a capacitor is connected across the postive and negative lines leading to the work being welded.
What does it do?
Thanks
TMT
The capacitor smooths the wave ripple and supports the voltage from collapsing.The result is better arc voltage and stability. Pete
The inductor serves a complementary purpose, it smooths out the current flow in a similar fashion to how the capacitor smooths out the voltage.
Yes, copy the value from the Hobart schematic as a starting point. You don't have to buy this from Hobart, I'm sure you can get it much cheaper from a source such as
Its nice not to have to worry about accidental arcs and flashes, once you use a machine with a contactor you won't want to go back.
Yes, if you improve the air flow to the case you can improve the duty cycle. Doing this the right way takes a little research but if you search around the web I'm sure you can find some info on it, first figure out the difference between a fan and a blower and which would be better in this situation.
Good luck-
Paul T.
Have something to add? Share your thoughts — no account required.
Ask the community — no account required