lanfox

modified 8 years ago

220v induction rectified Welder. Help with easy start circuit

275

05:44:31

Simulating 220vac double pull single throw power supply.

Veritable voltage adjuster, DC Rectifier, and choke.

Now trying to introduce an easy start circuit that will start the arc at full power  then automatically switch to adjusted heat level

published 8 years ago

hurz

8 years ago

Before you continue on complicated things, you should start in understanding the basics and see what the correct peak voltage is for a 220V rms AC source.

hurz

8 years ago

Yes, I also think so, tipp: a DC source with 220V gives you more power then yours here with 220Vpeak. And the DC source is also 220V rms! Yours is about 156Vrms check wiki for this topic.

lanfox

8 years ago

311pv

hurz

8 years ago

Were is your first comment?

piwarna

8 years ago

So, north america uses 220 volt center tapped transformers at the customers house. To simulate a double pole 220 volt breaker for your welding circuit just use a single 311 volt peak to peak ac supply.

piwarna

8 years ago

As for simulating an SCR you could use two diodes in parallel facing opposite directions, and your choice of a switch to turn them on and off, simulating the gate pulse.

piwarna

8 years ago

Correction, SCR just use a single diode with a switch for the gate pulse. TRIAC, use two diodes facing opposite directions with a switch to simulate the gate pulse.

hurz

8 years ago

Hmmm

lanfox

8 years ago

Thanks hurz, for the bump in the right direction. And thanks piwarna for explaining the doubble pole 220 work arround

hurz

8 years ago

How about this http://everycircuit.com/circuit/5738334436720640

lanfox

8 years ago

Nice hurz, but how would i calculate the primary induction on a MOT

hurz

8 years ago

With a scope and the known wire resistance by use of time constant, R and solve to L. I dont say thats easy and accurate, but I think its much better as model then this strange everycircuit motor model.

lanfox

8 years ago

Yeah, this model isn't as practical as id like.

hurz

8 years ago

How would you like it?

rich11292000

8 years ago

Going to screw up with the grounding. This is a phase to phase center tap. Y'all done confused this dude. 👎

lanfox

8 years ago

I wanted to simulate two separate 220v 50amp power supplies parralled with multiple MOTs. But i have no idea how to simulate the MOTs

hurz

8 years ago

Hey ho lets go

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