US 12,461,138 B2
Circuitry and methods for monitoring power conversion circuitry
Prasanth Sundararajan, Singapore (SG); Mohamed Sathik Mohamed Halick, Singapore (SG); Chandana J Gajanayake, Singapore (SG); and Amit K Gupta, Singapore (SG)
Assigned to ROLLS-ROYCE plc, London (GB)
Filed by ROLLS-ROYCE PLC, London (GB)
Filed on Jul. 26, 2023, as Appl. No. 18/226,597.
Claims priority of application No. 2212285 (GB), filed on Aug. 24, 2022.
Prior Publication US 2024/0069089 A1, Feb. 29, 2024
Int. Cl. G01R 31/26 (2020.01); H02M 1/00 (2006.01); H02M 1/08 (2006.01); H02M 5/293 (2006.01)
CPC G01R 31/2607 (2013.01) [H02M 1/0009 (2021.05); H02M 1/08 (2013.01); H02M 5/293 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A monitoring circuitry connectable to power conversion circuitry enclosed within packaging, the power conversion circuitry comprising terminals providing external connections to nodes of the power conversion circuitry enclosed within the packaging, the monitoring circuitry comprising:
a comparator comprising a first input terminals connectable to first and second terminals of the power conversion circuitry and a second input terminal connected to a reference voltage, wherein the first and second terminals provide external connections to first and second nodes connected along respective current paths each connected to switching circuitry of the power conversion circuitry enclosed within the packaging, wherein the comparator detects a switch state of the switching circuitry based on a voltage generated at the first input terminal and the reference voltage;
processing circuitry connected to the comparator and configured to monitor the power conversion circuitry based on the detected switch state and a signal of the power conversion circuitry; and
first and second current sensors connectable to third and fourth terminals of the power conversion circuitry, respectively, wherein the third and fourth terminals provide external connections to third and fourth nodes connected along respective current paths each connected to a capacitor of the power conversion circuitry enclosed within the packaging, the first and second current sensors configured to generate sensed current signals for indicating currents flowing through the respective third and fourth nodes, wherein the processing circuitry is:
connected to an output of the comparator and the first and second current sensors,
configured to generate a capacitor current signal, indicating a capacitor current flowing through the capacitor, based on the detected switch state and the sensed current signals, and
configured to monitor a condition of the capacitor based on the generated capacitor current signal.