Generator control unit with fast field discharge

Details Generator control unit with fast field discharge Generator control unit with fast field discharge

2008-09-18

2011-11-15

Cuevas, Pedro J (Department: 2839)

Electricity: single generator systems

Generator control

With excitation winding and/or circuit control

C322S044000, C361S064000

Reexamination Certificate

active

08058851

ABSTRACT:
A generator control unit for fast field discharge of a field coil is disclosed. The generator control unit comprises a control domain for detecting an excessive generator output voltage, a buck regulator with a feedback pin fed from the control domain, and an over-voltage protection switch connected in a field coil return path which is bypassed by a voltage limiting device. The control domain receives a point of regulation voltage feedback and upon detection of an over-voltage, emits a disable signal to cause the buck switch shut off along with the over-voltage protection switch. Thus dual breaking points are created at two ends of the field coil to dissipate the field charge quickly through the voltage limiting device. When the buck switch experiences a shorting failure, the over-voltage protection switch provides a second breaking point to allow the field discharge through the voltage limiting device, thereby controlling the field discharge with directly controlled over-voltage protection switch.

REFERENCES:
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patent: 6819537 (2004-11-01), Pohlman et al.
patent: 2003/0015996 (2003-01-01), Pohlman et al.
patent: 2008/0043393 (2008-02-01), Petkov
patent: 2010/0007312 (2010-01-01), Petkov

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