US 12,224,673 B2
Electrical power system
David R. Trainer, Derby (GB); Francisco Javier Chivite Zabalza, Stafford (GB); Mark Sweet, Chesterfield (GB); and Luke George, Derby (GB)
Assigned to ROLLS-ROYCE plc, London (GB)
Filed by ROLLS-ROYCE plc, London (GB)
Filed on Sep. 30, 2022, as Appl. No. 17/956,968.
Claims priority of application No. 2115515 (GB), filed on Oct. 28, 2021.
Prior Publication US 2023/0134788 A1, May 4, 2023
Int. Cl. H02M 3/335 (2006.01); B64D 27/24 (2006.01); H02M 1/00 (2006.01); H02M 1/32 (2007.01)
CPC H02M 3/33576 (2013.01) [B64D 27/24 (2013.01); H02M 1/0009 (2021.05); H02M 1/325 (2021.05); H02M 3/33573 (2021.05)] 20 Claims
OG exemplary drawing
 
1. An electrical power system comprising:
a DC voltage source;
a DC electrical network;
a DC to AC to DC converter comprising:
a transformer;
a primary side comprising a plurality of first transistors and a first inductor connected between the DC voltage source and a primary winding of the transformer, the first inductor being connected in series with the primary winding; and
a secondary side comprising a plurality of second transistors and a second inductor connected between the DC electrical network and a secondary winding of the transformer, the second inductor being connected in series with the secondary winding; and
a controller configured to control the DC to AC to DC converter, and being further configured to:
monitor an electrical current or voltage between the DC voltage source and the DC electrical network;
determine, based on the monitored electrical current or voltage, whether the DC electrical network is in a fault condition; and
increase a switching frequency of the primary side of the DC to AC to DC converter in response to a positive determination that the DC electrical network is in a fault condition.