US 12,405,293 B2
Current sensor for power electronic converter
Suman Dwari, Vernon, CT (US); Weilun Chen, Glastonbury, CT (US); Yongduk Lee, Manchester, CT (US); and Sriram Chandrasekaran, Lucas, TX (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jun. 16, 2023, as Appl. No. 18/336,630.
Prior Publication US 2024/0418750 A1, Dec. 19, 2024
Int. Cl. G01R 15/18 (2006.01); H03M 1/12 (2006.01); H03M 1/50 (2006.01)
CPC G01R 15/181 (2013.01) [H03M 1/1255 (2013.01); H03M 1/504 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A system, comprising:
a power switching circuit that provides a drive current to a load, the circuit comprising:
a power source; and
first and second serially connected switches that convert DC power from the power source into an AC current to form the drive current, or vice versa;
a first high-bandwidth current sensor circuit that measures a series of high-side current pulses through the first switch and provides a first analog signal that is proportional to the series of high-side pulses;
a second high-bandwidth current sensor circuit that measures a series of low-side current pulses through the second switch and provides a second analog signal that is proportional to the series of low-side pulses;
a signal processing device operationally coupled to the first and second current sensor circuits and is configured to perform steps including:
converting the first analog signal to a first digital signal and the second analog signal to a second digital signal; and
reconstructing the drive current and obtaining its cycle average values from the first and second digital signals.