A static magnetic exciter for synchronous alternators

By designing the basic exciter circuit of an alternator to make the machine as self-regulating as possible, and using the remaining deviations of output voltage to provide a correction signal to the exciter, the steady-state alternator voltage can easily be kept within ±0.6 per cent. No antihunt means are needed, transient response is rapid, and a short circuit will not cause loss of excitation.