filter capacitor in invertor welding machine

Status
Not open for further replies.
D

deepaknarkhede

Newbie level 3
Joined
Sep 14, 2010
Messages
3
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Visit site
Activity points
1,298
dear all,

I consrtucted Invertor welding machine 400A with filter capacitor 50MFD in DC link.
Some machine of same capacity uses 470MFD. I find large variations. How exactly it affects
the performance, can I use 25MFD for 250A machine?

deepak
 

There are several aspects determining the capacitor selection:

- 1 or 3 phase input
- accpeptable DC bus ripple voltage
- capacitor AC current rating

designing an inverter should include a calculation of capacitor parameters, I think
 

FvM said:
There are several aspects determining the capacitor selection:

- 1 or 3 phase input
- accpeptable DC bus ripple voltage
- capacitor AC current rating

designing an inverter should include a calculation of capacitor parameters, I think
Click to expand...

Thanks.
I dindt say I designed, I just copied. Thats why the question raised. The machine is three phase
and being welding machine as far as output is concern, it can accept any level of ripples. Only
it should be acceptable to IGBT and its firing. Will it affect temperature rise or if filter has to do with output ripples only, then I could remove it totally.
pl guide

deepak
 

Status
Not open for further replies.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…