US 11,850,951 B2
Electric propulsion systems
Tadashi Sawata, Coventry (GB); and Michael C. Harke, DeForest, WI (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Dec. 18, 2019, as Appl. No. 16/718,259.
Claims priority of application No. 19275003 (EP), filed on Jan. 8, 2019.
Prior Publication US 2020/0215922 A1, Jul. 9, 2020
Int. Cl. B60L 50/15 (2019.01); B64C 39/02 (2023.01); B64D 27/10 (2006.01); F02B 63/04 (2006.01); H02P 9/00 (2006.01); B64U 30/20 (2023.01); B64U 50/19 (2023.01)
CPC B60L 50/15 (2019.02) [B64C 39/02 (2013.01); B64D 27/10 (2013.01); F02B 63/042 (2013.01); H02P 9/008 (2013.01); B60L 2200/10 (2013.01); B64U 30/20 (2023.01); B64U 50/19 (2023.01)] 15 Claims
OG exemplary drawing
 
1. An electric propulsion system comprising:
a prime mover;
an electric generator which is arranged to be driven by the prime mover to generate electric power;
an electric propulsion motor arranged to receive electric power directly from the electric generator; and
an integrated generator-motor controller arranged to control the supply of said electric power from the electric generator to the electric propulsion motor in response to a control signal to cause the electric propulsion motor to operate at different speeds;
wherein the integrated generator-motor controller is also arranged to feed-forward to the generator a power demand parameter associated with the control signal so as to control the power output of the generator; and
wherein the prime mover is controlled to operate at a constant speed whilst the electric propulsion motor operates at different speeds.