Greg Bernard wrote: > Are you saying a single phase motor can be driven with 2 phase? How would > that be done and how would you control speed with such an arrangement? > Almost all motors that run from single-phase mains are actually 2-phase motors. The exception are the shaded-pole motors. Other motors need a phase rotation to start, and this is typically provided by a "start winding" which is switched in to start the motor. Now, the problem is the start winding was designed for starting, and so is usually not made to handle the heat of continuous operation.
But, capacitor-RUN motors are made to have the start winding energized continuously. If you had a VFD that was designed to produce two outputs with a 90 degree phase shift, you could run a capacitor-run motor from it just fine. You would leave out the start and run capacitors and the starting switch, and let the VFD do all the work. Jon ------------------------------------------------------------------------------ Virtualization & Cloud Management Using Capacity Planning Cloud computing makes use of virtualization - but cloud computing also focuses on allowing computing to be delivered as a service. http://www.accelacomm.com/jaw/sfnl/114/51521223/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
