I am working on Tin Can Seam Welding Machine. I am using 2 Phase 380 V AC supply. I want to use a VFD on the output of a Freite Core Transformer (Primary 380 V Secondary 3 V, f = 50 Hz ~ 200 Hz) . Please let me know which type of VFD I can use

 

Why do You need a Variable-Frequency-Motor-Driver on a Welder ?

Generally, there are Welders designed specifically for this type of Automated-Welding,
and they normally perform flawlessly because hundreds of hours were spent on their design.
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I ask the same question: Why the variable frequency?? I am not familiar with can welding, but obviously the weld power needs to be closely controlled.
As for the "two phase" power, mostly that is actually single phase with a center tap. Some utilities add a "Teaser Phase and provide it as "3-phase" power. I have worked in a shop that had that power and the 3 phase motors ran quite well.
The two-phase power had a neutral in the center.
There are VS drives that will accept either 3-phase mains or single phase mains, and they usually provide true 3-phase output for 3-phase motors.
And I doubt that the drive would be used on the 3 volt OUTPUT of the transformer, but rather to feed the primary side of the transformer. Please verify if that is actually the case.

 

Seam welding takes many forms and situations, and invariable have a welding rate/speed control. If this is 380v (truly) 2 ph, do you not have the full 3ph capability there?
I assume the 2 phases is just for the ferrite transformer for the seam welder?
This is the ones I am familiar with and have worked on in the past, Welding the seams on automotive gas tanks.

 

I ask the same question: Why the variable frequency?? I am not familiar with can welding, but obviously the weld power needs to be closely controlled.
As for the "two phase" power, mostly that is actually single phase with a center tap. Some utilities add a "Teaser Phase and provide it as "3-phase" power. I have worked in a shop that had that power and the 3 phase motors ran quite well.
The two-phase power had a neutral in the center.
There are VS drives that will accept either 3-phase mains or single phase mains, and they usually provide true 3-phase output for 3-phase motors.
And I doubt that the drive would be used on the 3 volt OUTPUT of the transformer, but rather to feed the primary side of the transformer. Please verify if that is actually the case.

Yes
You are right. Please let me know the Drive unit made by any manufacturer , for example INVT, Delta, Fuji, ABB..., with their model number. I will purchase that drive. I have a Ferite core transformer. Frequency from 50 Hz to 200 Hz.
Just like VFD for Induction motors... What are the drives for Transformer for Seam Welding Transform

 

Possibly some confusion was created by associating a VFD with a "Welder".
Could it be that the VFD is for the Motor and gear-train that rotates the metal "Can" as it is being welded ?

Also, just from reading about the various descriptions of "2-Phase" power ...........
This sounds like what is commonly referred to in the USA as a "High-Leg"-System which usually
consists of one of the 3-Phases having a much higher Voltage to Ground than the first 2 Main-Phases.
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OK, from post #1 the TS states that the VFD would be used
to drive a "ferrite core transformer. (Primary 380 V, Secondary 3 V, f = 50 Hz ~ 200 Hz) . That would be three volts at a lot of amps and a variable frequency. So there must be a requirement for best welds to control both voltage and frequency in can welding.
My suggestion is to contact a supplier of VSD packages customer support group.

 

As for the "two phase" power, mostly that is actually single phase with a center tap.

This was my first thought as well; 2 phase ? ? ?

Now, I'm not familiar with any other kind of phasing than split phase (120 - 0 - 120 [or 240VAC]) and three phase. So I can't comment on any of that, but I'm also wondering why we're inventing another wheel. I've done "Some" work in the field of welding, and I certainly don't know much at all. I have a little welder in the garage and use it to make simple things. So I'm no expert in that. But I've seen enough different kinds of welding to be fairly confident there's already a solution to the problem you're trying to solve. Unless there's something I don't know; which can be likely.

 

Two wire AC is single phase, A 2 phase supply requires 3 conductors.
(The 120v-0-12v N.A. system is split phase.)

 

Two wire AC is single phase, A 2 phase supply requires 3 conductors.
(The 120v-0-12v N.A. system is split phase.

Just out of curiosity, what's the phasing on a 2 phase source? And no - I don't want to hijack this thread.

 

Just like VFD for Induction motors... What are the drives for Transformer for Seam Welding Transform

What is the nature of the seam welder and what exactly is the application?

 

Just out of curiosity, what's the phasing on a 2 phase source? And no - I don't want to hijack this thread.

Generally. 120°