Sustained undervoltage protection
AssigneeHamilton Sundstrand Corporation
InventorRobert L. Seagren
Life of this patent
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Abstract
A method includes detecting a modulating undervoltage state having transients above an undervoltage threshold and triggering a protection upon detecting the modulating undervoltage state. The method can include detecting a steady state undervoltage condition, wherein triggering a protection includes triggering the protection upon detecting the steady state undervoltage condition or the modulating undervoltage state. A system includes a power source including a feedback sensor at a point of regulation (POR) of the power source configured to generate feedback indicative of voltage at the POR. A controller is operatively connected to receive the feedback. The controller includes controller logic that is configured perform a method as described above.
Claims20
A method comprising:
- detecting a modulating undervoltage state having transients above an undervoltage threshold;
- and
- triggering a protection upon detecting the modulating undervoltage state, wherein triggering the protection includes removing a generator output from an electrical system by at least one of opening a generator control unit (GCU) generator control relay, removing generator excitation, or opening a main line contactor.
A system comprising:
- a power source including a feedback sensor at a point of regulation (POR) of the power source configured to generate feedback indicative of voltage at the POR, wherein the power source includes a generator with a generator output configured to supply power to an electrical system;
- and
- a controller operatively connected to receive the feedback, wherein the controller includes controller logic that is configured to:
- detect a modulating undervoltage state having transients above an undervoltage threshold;
- and
- trigger a protection upon detecting the modulating undervoltage state, wherein the protection includes removal of the generator output from the electrical system by at least one of opening of a generator control unit (GCU) generator control relay, removal of generator excitation, or opening of a main line contactor.
A method comprising:
- detecting a modulating undervoltage state having transients above an undervoltage threshold, wherein detecting the modulating undervoltage state comprises:
- receiving feedback from a point of regulation (POR) in a generator system as input voltage;
- comparing the input voltage against a predetermined set threshold;
- and
- setting a latch in response to the input voltage falling below the predetermined set threshold;
- and
- triggering a protection upon detecting the modulating undervoltage state.
Dependencies are inferred from the claim text.