On Mon, 24 Sep 2012 17:54:23 -0500, Jon Elson
wrote:

Cross-Slide wrote:

I remember reading a book about motors, and one of the more interesting
ones was referred to as a "Printed Pole Motor" IIRC.

I believe they are now used in high-end machining centers as a way
to get very wide speed ranges at full HP without using gearing or
belt drives. I think they are also called switched reluctance
motors. They do not use any permanent magnets, but rewrite the
poles on an iron rotor.

Jon
Apparently " printed" pole motors are now called "written" pole
motors. See this link: http://www.meridiumpower.ca/C/c_1.html for an
explanation.
Eric