US 11,916,374 B2
Fault managed power system
Jason Dewayne Potterf, Austin, TX (US); Chad M. Jones, Doylestown, OH (US); and Joel Richard Goergen, Soulsbyville, CA (US)
Assigned to CISCO TECHNOLOGY, INC., San Jose, CA (US)
Filed by Cisco Technology, Inc., San Jose, CA (US)
Filed on Dec. 27, 2021, as Appl. No. 17/562,464.
Claims priority of provisional application 63/232,817, filed on Aug. 13, 2021.
Claims priority of provisional application 63/229,605, filed on Aug. 5, 2021.
Prior Publication US 2023/0040876 A1, Feb. 9, 2023
Int. Cl. H02H 7/26 (2006.01); G01R 31/52 (2020.01); G06F 1/26 (2006.01); H04B 3/54 (2006.01); H04L 12/10 (2006.01); H04L 25/08 (2006.01)
CPC H02H 7/26 (2013.01) [G01R 31/52 (2020.01); G06F 1/266 (2013.01); H04B 3/54 (2013.01); H04L 12/10 (2013.01); H04L 25/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system comprising:
an alternating current to direct current (AC-DC) conversion circuit coupled to an AC power supply that converts AC power to DC power;
a power transmitter configured to provide power to a current loop;
an isolation circuit coupled between the AC-DC conversion circuit and the power transmitter; and
a power receiver configured to receive the power from the current loop;
wherein the power receiver is configured to, on a periodic basis, disconnect from the current loop to stop pulling power from the current loop for a period of time to enable a safety check to be performed by the power transmitter;
wherein the power transmitter is configured to:
monitor current on the current loop;
determine whether a current level on the current loop passes the safety check within a predetermined time interval since a determination that the current level was not within a safe range; and
control connectivity of the power to the current loop depending on whether the safety check has or has not passed within the predetermined time interval by terminating operation of a pulse control signal to the isolation circuit to provide pulse power from the AC-DC conversion circuit to the current loop.