Re: [CAD_CAM_EDM_DRO] Re: VFD

jmkasunich wrote:

> --- In CAD_CAM_EDM_DRO@yahoogroups.com, "mr_peja <peja@n...>"
> <peja@n...> wrote:
>
>>Hi, group members,
>>
>>I'm planning to build a VFD for 3-phase motor
>>Does anybody know where to find schematic(s).
>>Peja
>
>
> Depending on the required power, you can buy a VFD for
> $200-500. The only way you could possibly justify
> building one from scratch is if you want the learning
> experience. You will learn a lot, like how many ways
> there are to let the smoke out of IGBTs.
>
> I design VFDs for a living, and have been known to
> build things that any sane person would just go out
> and buy, but I would not try to build a VFD at home
> from scratch.
>
> John Kasunich

I remember seeing some older Motorola Ap notes on this, but with all of
Motorola's changes they probably got lost.
Bill Higdon