US 12,224,700 B2
Starter/generator arrangements for gas turbine engines
Brennan Fox, Machesney Park, IL (US); and Mustansir H. Kheraluwala, Lake Zurich, IL (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Jan. 13, 2023, as Appl. No. 18/154,363.
Prior Publication US 2024/0243677 A1, Jul. 18, 2024
Int. Cl. H02P 1/30 (2006.01); B64D 27/10 (2006.01); F02C 6/00 (2006.01); F02C 7/268 (2006.01); H02P 1/52 (2006.01); H02P 3/00 (2006.01); H02P 9/02 (2006.01)
CPC H02P 9/02 (2013.01) [B64D 27/10 (2013.01); F02C 6/00 (2013.01); F02C 7/268 (2013.01); F05D 2220/323 (2013.01); F05D 2220/76 (2013.01); F05D 2260/85 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A variable frequency starter generator (VFSG) system, comprising:
a VFSG having a start mode and a generate mode, a permanent magnet generator (PMG) and a main generator section and an exciter section; and
a controller electrically connected to the VFSG, the controller configured to flow start mode three phase electrical power from aircraft power to the exciter of the VFSG in the start mode and to flow single phase electrical power to the exciter of the VFSG in the generate mode, the controller including:
an input active rectifier that receives input AC power and converts it to DC power and provides it to across a positive rail and negative rail;
an output inverter coupled to an output of the input active rectifier; and
one or more line inductors connected along one or both of the positive rail and negative rail between the input active rectifier and the output inverter through which current is provided to the output inverter.