US 12,034,396 B2
Fast POR trim correction
Vlatko Miskovic, Loves Park, IL (US); Shawn J. Young, Sycamore, IL (US); Dwight D. Schmitt, Rockford, IL (US); and Matthew Ryan Hasseman, Poplar Grove, IL (US)
Assigned to Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jan. 4, 2021, as Appl. No. 17/141,012.
Prior Publication US 2022/0216815 A1, Jul. 7, 2022
Int. Cl. H02P 9/00 (2006.01); H02P 9/10 (2006.01); H03H 17/00 (2006.01)
CPC H02P 9/102 (2013.01) [H03H 2017/0081 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system comprising:
a generator control unit (GCU) configured to control a generator;
a first sensor connected to provide feedback to the GCU for generator control, wherein the first sensor is configured to sense voltage and/or current in a feeder connecting between the generator and a load;
a second sensor connected to provide feedback to the GCU for generator control, wherein the second sensor is configured to sense voltage and/or current in the feeder connecting between the generator and the load, wherein the first and second sensors are configured to connect to the feeder apart from one another with feeder impedance therebetween; and
logic in the GCU configured to cause the GCU to use the feedback from the first and second sensors to control the generator,
wherein the logic is configured to detect faults in each of the first and second sensors and continue operation of the generator in the event of only one of the sensors faulting, wherein the logic is configured to cause the GCU to:
detect a discrepancy between the first and second sensors,
decide whether the first sensor is at fault or whether the second sensor is at fault when detecting the discrepancy, and
control the generator based on the feedback from whichever of the first sensor or the second sensor is not at fault, and
wherein the logic is configured to detect the discrepancy by comparing summed magnitudes or magnitudes squared of voltage and/or current sensed for each of three phases of the feeder for each of the first and second sensors versus a respective threshold [V_OSF_TH and −V_OSF_TH] for each of VPOR OSF (voltage open sense failure at a point of regulation for the second sensor) and VGEN OSF (voltage open sense failure at a point of the first sensor), wherein VPOR OSF is logic for comparing the V_OSF_TH threshold to the summed magnitudes or magnitudes squared of voltage and/or current sensed for each of three phases of the feeder for each of the first and second sensor, and wherein VGEN OSF is logic for comparing the −V_OSF_TH threshold to the summed magnitudes or magnitudes squared of voltage and/or current sensed for each of three phases of the feeder for each of the first and second sensor.