Versatile AC dynamo-electric machine

摘要

The Invention comprises a versatile AC dynamo-electric machine comprising isolated dual stators, each both concentrated windings energizable with single-phase AC, and main windings and a single high inertia sleeve and drive place connected to a rotor shaft. The sleeve contains independent electrical rotors, one for each stator. Each rotor has an innermost layer of magnetizable permanent magnetic material in which the concentrated coils in the stator produce a desired pattern of magnetic poles reacting with the rotating field of the main windings. The machine can function as a synchronous AC motor, or a constant frequency output dual AC generator or as an AC motor-generator with long ride-through time. A UPS system comprises the machine in the motor-generator mode, with clutch means to connect an engine to the rotor shaft to start the engine.