it might work, but little 110 to 220 transformers are really cheap ( a few
dollars each), why not just add a transformer - if this is in the USA, just
pull a neutral to the lathe and you have 110 as well as 220. But I think I
can assure you the VFD won't need extra cooling - if you meant extra cooling
for the motor, I think you will find that 220VAC muffin fans are much
cheaper at surplus stores than 110 ones.


"Paul" wrote in message
. ..
There's metal content as this will be part of a lathe repower project.

If one were to take two fans, something like square framed heat sink
fans,and stack them one after the other would they act as a 'two stage'
fan, so to speak?

I'm changing my lathe over to a VFD and as the motor will be running at
slower speeds I think extra cooling will be required. There's no 120 VAC
on the machine but I can easily get 220 VAC. Yes, I could buy or scrounge
a 220 volt heat sink fan but I'm thinking about wiring two 120 volt fans
in series as those are much more common and as long as I was going to have
two I started thinking if stacking them would offer any advantages.

regards
Paul


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