4 Jan
2022
4 Jan
'22
3:52 p.m.
On Tue, Jan 4, 2022 at 12:00 PM Adrian Stoness via cctalk <
cctalk at classiccmp.org> wrote:
you can use a vfd drives to get 3phase power from
single u just gotta size
them bigger then the load u would normally need
Yes, in principle this is true. In the simplest case, the VFD input is
just a 6
diode full wave rectifier into a capacitor. BUT things like power
factor correction on modern drives means the input circuit is a lot more
complex. Usually the small VFD will be designed for single phase power or
3phase power and the derating is done for you. Using a 3phase drive on
single phase typically won't work because the drive will detect a phase
loss and shut down. I know for one Rockwell drive there was an internal
hack that allowed it to work on single phase so the sales people could plug
into a 120vac outlet.
Chuck D.