Has anyone looked at microchip's an 843 lately? It's a nice example of a variable voltage-variable frequency drive for three-phase induction motors. It is shown with a three-phase source that is rectified and filtered. I began thinking (scary, eh?!) that this could be fed by a 2 wire single phase line also...and rectified with even less parts... couldn't it? Assuming line current is not an issue, this would result in a 3-phase induction motor controller that could be run from a single phase line. I don't believe I've ever seen such a product... It seems there would be nice demand for such a thing since many places do not have 3-phase power available....Hmmmm Am I on to something here, or am I overlooking the obvious - or not so obvious? Chris -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body