The DC Motor/Generator consists of a 4-pole machine rated at 2 kW. It has one shunt field winding, two series field windings, and one inter-pole winding. The winding dimensions permit the study of DC machine operation as a shunt machine, a series machine, a cumulative compound machine, and a different compound machine.

The DC Motor/Generator may also be operated as a dynamometer. It is equipped with a hydraulic torque measuring device calibrated from 0 to 30 N·m (0 to 266 lbf·in).

A handle permits easy displacement of the brushes to study the effect of armature reaction and commutation. Three search coils permit observation of the flux distribution at one pole of the stator, at one tooth, and at full pitch of the rotor through slip rings.