Isolated generator control unit (GCU)

Electricity: single generator systems – Generator control – Combined permanent magnet and wound field structure

Reexamination Certificate

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Details

C322S044000

Reexamination Certificate

active

08030905

ABSTRACT:
An apparatus and method for allowing continuous operation of a generator control unit (GCU) despite a ground fault short circuit is disclosed. More specifically, a generator control unit (GCU) that maintains an isolated power pass domain in a completely floating set up with respect to the ground referenced control domain is used to allow continuous operation of a generator control unit (GCU) even when an internal wiring such as a permanent magnet generator wire or a generator field coil wire comes in contact with the chassis due to failure of the insulation. In addition, the apparatus and method also utilizes a high ohmic resistor as the only connection between the isolated power pass domain and the ground referenced control domain to control the voltage spike that occurs during a ground fault short circuit. Finally, the apparatus and method is also capable of detecting the occurrence of a ground fault short circuit by utilizing a ground fault detection to detect a disbalance current passing through a high ohmic resistor.

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patent: 5126658 (1992-06-01), Twerdochlib
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patent: 6130398 (2000-10-01), Schneider et al.
patent: 6936996 (2005-08-01), Uematsu
patent: 7629836 (2009-12-01), Kull et al.
patent: 2001/0048310 (2001-12-01), Takahashi

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