ABSTRACT
An important factor in the employment of asynchronous or induction generators, which are basically induction motors driven above synchronous speed, is the system to which the generator will be connected and the capability of that system to supply the necessary magnetizing power. The fact that the induction generator derives its excitation from the system and cannot therefore run completely isolated (capacitor bank excitation excepted) is a disadvantage where a suitable system is not available. It also suffers from the disadvantage that the natural inertia of the generator is considerably less than that of the equivalent, specially designed, synchronous generator. This can, however, be compensated for by adding a flywheel. These disadvantages are to some extent offset by the following important advantages.
