In March 2011, EXITECH completed its Variable Frequency Drive (VFD) update for the recirculation pump simulation of a Southeastern utility.  The project used first-principles modeling and a collaborative environment to aid and augment the design of the VFD design and circuitry.  The VFD is currently being used for operations training in normal and transient conditions.  Please contact Gus Wanner regarding Variable Frequency Drive modeling support for your plant or industrial site needs.