Re: [CAD_CAM_EDM_DRO] VFD ??

Ron Kline wrote:

>I'm probably oversimplifying this but it sounds like I could just buy a
>large , like 15 HP one set it on 60 HZ and run all the 3 phase stuff in
>the shop from it ??
>Someone tell me why this won't work .
>
>

VFDs are designed to run ONE motor. Most of them have large warnings in the
manuals to NEVER put any switch between the VFD and the motor. The
inductance
of the motor windings can generate voltage spikes when opened or closed
that can destroy
the VFD. Many VFDs will trip when suddenly presented with a stopped
motor when
they aren't expecting it.

Jon