The Universal Motor is a 0.2 kW universal machine mounted in a full-size EMS module. Its commutator bars and adjustable brushes are exposed to allow students to study the effect of armature reactions and commutation while the machine is running under load. The armature winding, the series field winding, and the compensation winding are terminated independently on the module front panel by 4 mm color-coded banana jacks. Students can observe the effects of both inductive and conductive compensation on motor speed and torque for both ac and dc input voltage sources.