초록 ▼

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

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.

대표청구항 ▼

A shorted diode protection system for a brushless alternating current generator of the type having an energizeable exciter field winding, said system including: means for sensing a voltage difference across said exciter field and pairing said voltage difference with generator load current at the ins

A shorted diode protection system for a brushless alternating current generator of the type having an energizeable exciter field winding, said system including: means for sensing a voltage difference across said exciter field and pairing said voltage difference with generator load current at the instant said voltage difference is sensed, said sensing means thereby providing an output signal that depends upon said instantaneous voltage sensed and said load current, said output signal falling within a predictable range of voltage difference values over a normal generator load current range, said output signal falling within a higher range of voltage difference values upon the occurrence of a shorted diode, said means for sensing said voltage difference being electrically coupled across said exciter field and including multiplexer means electrically coupled across said exciter winding and to a microprocessor means included in said means responsive to said output signals, said multiplexer means adapted to receive signals from either side of said exciter winding and a control signal from said microprocessor means, means responsive to said output signal such that whenever said output signal representing a voltage difference exceeds a preset value of voltage difference at any given load current in said normal load current range, an output is generated that interrupts the energization of said exciter field.