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Separately excited field allows adjustment of torque, power factor and efficiency at any speed. Allows lower supply voltages with high speed operation along with high torque output to satisfy demanding applications.

Low starting currents are possible when used with a brushless DC amplifier since Volt/Amp transforms between the input supply and the armature occur with minimal losses.

Brushless DC drives allow variable speed, variable torque and constant torque applications, plus very high speed operation.

Energy densities as high as one horsepower per pound (1.64 Kw/Kg) machine weight at high speeds.

Peak efficiencies as high as 97% with an average operating efficiencies as high as 88% over a load range of 10% to 100% .

Synchronous operation allows line voltage of AC inverter use to provide fixed or variable speed operation.