On Thu, 13 Apr 2017 07:35:32 -0400, "Jim Wilkins"
wrote:

"DoN. Nichols" wrote in message
...

How well do you think an electric motor would work as a rotary
transformer? They are already balanced and built to withstand the
RPMs.
-jsw

what kind of electric motor? I'm assuming a universal motor. What
advantage do you get using a brushed motor with a commutator in place
of the VERY much simpler slip rings?????? Also, with a rotating
transformer the pulse timing for the solenoid is likely going to get
pretty hairy due to the magnetic retention of the cores.

There is really nothing wrong with using slip rings, and it is the
most elegant solution due to it's sureme symplicity. NOTHING he is
trying to do contraindicates using slip-rings.