phase converters

[Jon S]

I am somewhat baffled about where this idea of running the motors at a lower voltage has come from, my rotary converter on 240v single phase gives 415v on 3 phases.

[Jonathan]

I am somewhat baffled about where this idea of running the motors at a lower voltage has come from

A VFD run from a 240V supply just rectifies the input, so unless it includes a voltage doubler on the input (don't know if that's something that's available, wouldn't be surprised) it cannot run the motor on 415v.

This article explains about the various ways:
http://reviews.ebay.co.uk/3-THREE-PH...00000001476333

[Jon S]

Well clearly from the ebay article you cite Rotary phase converters are a thing of the past.

Edit - Sarcasm is so easy :-) The chap is clearly considering his options and they are problematic in any direction, I am sure he is aware of that and not planning to install in his attic !

Cheers,

Jon