Re: Question on Power Supply - regulated notes - motor information

>
> I thought it was a cute trick to be able to determine and control

the pump

> speed WITHOUT a tach or feedback device.
>
> Alan KM6VV

A variable speed drive will manipulate the voltage and frequency of a
motor, and by monitoring current and voltage a well as other things on
the power line, one can pretty much tell more than you might imagine
on a motor.. AND... the thing it is driving.

Dave