Generator shorted diode protection system

Details Generator shorted diode protection system Generator shorted diode protection system

1982-01-19

1984-12-04

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

361 79, 322 59, 322 69, H02H 706

Patent

active

044868014

ABSTRACT:
This invention relates to a shorted diode protection system for a brushless alternating current generator of the type having an energizeable exciter field winding. The system includes a circuit arrangement for sensing the voltage difference across the exciter field and pairing the voltage difference with generator load current to thereby provide an output signal that falls within a predictable range of values over a normal generator load current range. The output signal is of such a nature that it falls within a higher range of values upon the occurrence of a shorted diode. Another circuit arrangement is responsive to the output signal such that whenever the output signal exceeds a preset value over the normal load current range, an output is generated that operates to cause the interruption of the exciter field.

REFERENCES:
patent: 3210603 (1965-10-01), Calfee et al.
patent: 3478286 (1969-11-01), Dervan
patent: 3534228 (1970-10-01), Hyvarinen et al.
patent: 3705331 (1972-12-01), South et al.
patent: 4219769 (1980-08-01), MacFarlane et al.
patent: 4321681 (1982-03-01), Sackin et al.

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