3ph 2.5kw 380v 50hz 2 speed motor off of 220v single phase

wiseman9986 · Apr 4, 2017

I have a klopp shaper that has a 380v 50hz 2.5kw 2 speed motor 1410/2880 rpm I belive it is dahlander wound so it cannot be run on a lower voltage that I know of. What would be the most economical way to get this running I'm assuming a vfd just hooked up to the high speed and a single phase transformer before the vfd I have 220v single phase 60hz incoming I am just unsure about the transformer or maybe there is a better way

JST · Apr 4, 2017

380V 50 Hz is equivalent to 460V 60 Hz.

So the most direct way to deal with it is probably to use a transformer step up the 220/230 single phase to 460/480 and use a 480V VFD.

SteveBausch · Apr 4, 2017

Tolerate the reduced power and possible abuse of the starter and run it on 220?

Belt drive from motor?

2.5 kw is roughly 3HP, right?

wiseman9986 · Apr 4, 2017

They call it a friction drive the motor has a rubber wheel that drives a big cast iron wheel and yes 3hp. So your saying it's ok running on 460v? Seems like a big difference?

DaveKamp · Apr 15, 2017

Seems like a big difference, but it's a reactive circuit, impedance limits current... it's all about the v/hz ratio.

If it were mine, I'd use a 3kva dry transformer to step up your 220v to 440ish single phase, direct that into a 480v class VFD, and program it to run as you desire. If you're nervous about the 380v number, program the VFD for max voltage of 380... it'll limit it out accordingly.

wiseman9986 · Apr 15, 2017

Thank you very much sounds like a good option any recommendations on where to get the transformer

Search

Largest Manufacturing Technology Community on the Web

Search

3ph 2.5kw 380v 50hz 2 speed motor off of 220v single phase

wiseman9986

Plastic

JST

Diamond

SteveBausch

Stainless

wiseman9986

Plastic

DaveKamp

Titanium

wiseman9986

Plastic

Similar threads