On Fri, 2011-11-11 at 17:15 -0500, gene heskett wrote: > On Friday, November 11, 2011 05:13:00 PM Kirk Wallace did opine: > > > On Fri, 2011-11-11 at 12:42 -0800, Kirk Wallace wrote: > > > I noticed each pole has a split at an angle which reminds me of a > > > split-phase motor which uses the split to get the single phase motor > > > to start in the proper direction. > > > > Oops, correction I meant shaded pole motor: > > http://en.wikipedia.org/wiki/File:Shaded_pole_detail.jpg > > :) > > And you might have had more luck with that had you cut and removed that > single shorted turn of copper around that smaller section of each pole. > > Cheers, Gene
There isn't a copper loop that I can see, just a slot and slight step in the pole foot. There might be one under the main winding, but there is no indication of it. There are three wires, tiny, small, and a little larger, wound in parallel on each pole. My guess is they are wound North then South until the sixth pole where they are commoned to Neutral. The speed switch controls which of the three wires are powered, and therefore how strong the fields are. Without a fan blade the motor turns the same speed, around 1100 RPM, or used to, before I hacked it up. With a fan or load the rotor slips at a rate dependent on the field strength. This is a little strange to me because I am used to induction motors with very little slip. Realizing that the fan speed is dependent on field strength, I guessed that an SCR speed controller would also work, which seems to work fine on one of my speed controllers, but not on the one labeled "router controller" (it may have a lot of DC on the output). I'll have to try a light dimmer next. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
