On Fri, 2010-11-12 at 10:10 -0800, Peter C. Wallace wrote: ... snip > All this three phase stuff makes me wonder if a car alternator (with diodes > removed) would make a fair AC servo motor (you would have to supply the field) > I guess one disadvantage is that they would have fairly high inertia > > The advantage of the separate field would be a wide constant power speed range > (vary field roughly proportional to inverse speed) > > Peter Wallace > Mesa Electronics
I have seen it done on the Internet, but they are very inefficient as alternators, and worse as motors. Although, I am speaking of the older alternators where cost was almost the only consideration. Now-a-days, size, weight and economy are factors as well. Another project I was thinking about, is seeing if my motorcycle permanent magnet alternator would work as a three-phase motor. It is configured just like an out-runner, but this doesn't have a controllable field. Getting rid of delicate magnets is appealing. -- Kirk Wallace http://www.wallacecompany.com/machine_shop/ http://www.wallacecompany.com/E45/index.html California, USA ------------------------------------------------------------------------------ Centralized Desktop Delivery: Dell and VMware Reference Architecture Simplifying enterprise desktop deployment and management using Dell EqualLogic storage and VMware View: A highly scalable, end-to-end client virtualization framework. Read more! http://p.sf.net/sfu/dell-eql-dev2dev _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
