US 12,253,574 B2
Adaptive impedance tracking
Chin-Feng Huang, New Taipei (TW); Ping-Yang Lai, Taichung (TW); Sin-You Lin, Taichung (TW); and Li-Chung Lin, Luodong Township (TW)
Assigned to Advanced Energy Industries, Inc., Denver, CO (US)
Filed by Advanced Energy Industries, Inc., Denver, CO (US)
Filed on Dec. 29, 2022, as Appl. No. 18/147,966.
Prior Publication US 2024/0219478 A1, Jul. 4, 2024
Int. Cl. G01R 31/40 (2020.01); H02M 3/158 (2006.01); H01J 1/10 (2006.01); H01J 1/14 (2006.01); H02J 1/10 (2006.01); H02J 1/12 (2006.01); H02J 3/46 (2006.01)
CPC G01R 31/40 (2013.01) [H02M 3/158 (2013.01); H01J 1/10 (2013.01); H01J 1/14 (2013.01); H02J 1/106 (2020.01); H02J 1/12 (2013.01); H02J 3/46 (2013.01); H02J 3/466 (2020.01); H02J 3/472 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A method for current sharing in a power system having multiple power supply units (PSUs), the method comprising:
generating a first power by a first PSU and supplying the first power to a load;
generating a second power by a second PSU and supplying the second power to the load;
sensing a remote voltage value received by the load based on an accumulation of the first power and the second power;
determining, by the first PSU:
a local voltage value of the first power;
a current value of the first power;
a real impedance value of the first PSU based on the remote voltage value, the local voltage value of the first power, and the current value of the first power; and
a virtual impedance value of the first PSU based on the real impedance value of the first PSU and a reference impedance value; and
controlling generation of the first power by the first PSU based on the virtual impedance value of the first PSU.