Making a large electric motor from scratch
discussed here about making very simple and small electric motors from
scratch. What I want to do is to make a fairly large and powerful one
(say, somewhere around the size of a coffee can). This is for a
sculpture project, and the motor will be driving a kinetic mechanism.
I'm pretty handy, have a extensive range of tools and am comfortable
working with high voltage. What I am not, however, is knowledgeable
about designing or making electric motors; hence my questions.
I understand that I'll need to wind armatures and so forth, but I
don't know what the advantages/disadvantages would be of making a DC
versus an AC motor (either power could be supplied), nor do I really
understand the differences between the various types of those two. The
motor needs to be able to start by itself under load (as opposed to
some homemade electric motors that seem to need a nudge to get going).
Simplicity, low maintenance and ease of construction would be a plus.
I had thought of making a homopolar motor such as they have at the
) but it seems that homopolar motors like this cause considerable wear
to the part that acts as a brush, which will work against my goal of
low maintenance. Unless...perhaps I could use a rolling conductor
(like a precision bearing) as a brush? Does that make any sense?
Thanks for any advice!