A twin-engine drive system for a common load, which comprises two synchronous motors, each motor having an armature winding intended to be powered with alternating current and having a field winding, means for supplying direct current excitation to said field windings means for individually controlling the excitation of each field winding, means for mechanically connecting said motors to drive a common load, and means capable of responding to the input powers of said motors to continuously adjust said means of controlling the field excitation to in order to relatively reduce the field excitation of the motor having the highest input power and increase the field excitation of the motor having the lowest input power. (Machine-translation by Google Translate, not legally binding)
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