Short protection device for alternator

Details Short protection device for alternator Short protection device for alternator

2011-04-12

2011-04-12

Fureman, Jared J (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Generator protective circuits

C361S093100

Reexamination Certificate

active

07924536

ABSTRACT:
A short circuit protection device for the protection of an alternator in which turning on/off a trigger switch causes conduction/cutoff of the field current of the field coil of the alternator is disclosed. The protection device enables the field current to pass through a sensor so that when the field current is abnormally high and the voltage drop across the sensor rises, the potential of an input end of a boost circuit electrically connected to the sensor correspondingly arises and an output end of the boost circuit electrically connected to a shutoff device drives the shutoff device to turn off the trigger switch, and the boost circuit further keeps the shutoff device in on-state to hold the trigger switch off till the short circuit condition is eliminated and the protection circuit system is reset.

REFERENCES:
patent: 4555742 (1985-11-01), Gray et al.
patent: 4561036 (1985-12-01), Morishita et al.
patent: 4602205 (1986-07-01), Matsuhashi et al.
patent: 5254935 (1993-10-01), Vercesi et al.
patent: 5744941 (1998-04-01), Bartol et al.
patent: 5990666 (1999-11-01), Sekiya et al.
patent: 7102332 (2006-09-01), Sasaki et al.
patent: 7397224 (2008-07-01), Jabaji
patent: 2008/0084191 (2008-04-01), Harmon et al.

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