The Three-Phase Wound-Rotor Induction Machine is a rotating machine mounted in a full-size EMS module. Each phase of the stator windings is independently terminated and identified on the faceplate to permit operation in either delta or star (wye) configuration. The rotor windings are brought out to the faceplate via external slip rings and brushes. This machine can be used as a wound-rotor induction motor, phase shifter, single-phase variable coupling transformer, three-phase transformer, selsyn control, frequency converter or asynchronous induction generator. The speed of the machine can be controlled through the use of the Three-Phase Rheostat.

This version has a 2:1 turn ratio on the rotor, which is optimized for using with a rotor rheostat. There is also a different version that has a higher turn ratio on the rotor, to be used as a DFIG.