A short story for the curious. I was hoping to hack a motor to get a short (pancake like) three phase motor. I used a motor from an old box fan, similar to this one: http://www.surpluscenter.com/item.asp?item=10-2121&catname=electric
My motor had a stator core with six poles so I cut the wires between each pole and rewired them to get three sets of opposing pole pairs , connected the South sides together then used the North side wires for U, V, and W. I reprogrammed my VFD to give 100 Volts at maximum frequency and gave it a try. The motor turns slowly with very little torque, but the surprise came when I tried to reverse the direction. The motor came to a stop, hinted at turning the other way then turned forward again. 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. I thought the three phase layout would override the split, but I guess not. Now I need to figure out how to put the motor back the way it was and find a different motor to hack. -- 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 Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
