Re: [CAD_CAM_EDM_DRO] high frequency spindle motors

>
>It might still be possible to rewind these spindles without massive
>effort, depending on the
>way they are built.

Now I'm wondering what I really have here. One of the units has a label
that says 40000rpm at 660hz,120 volts, 8.5 amps. I pulled it apart and
there was no visible (or olfactory) evidence of a burned winding. The
windings actually have 4 wires. There is a resistance of 2 ohms on each
pair of wires. there is no connection between the 2 pairs of wires. I think
I have a *2 phase* AC induction motor. I did a little reading on polyphase
motors and discovered that there were actually 2 phase motors used at one
time. Instead of a 120 degree phasing they require 90 degrees between the
phases.

I think I may be screwed as far as applying a 3 phase inverter to these
motors.

-Bob