US 12,244,187 B2
Electric propulsion system for delivering high torque
David B. T. Sercombe, Arundel (AU); and Roei Ganzarski, Redmond, WA (US)
Assigned to MAGNIX USA, INC., Everett, WA (US)
Filed by MagniX USA, Inc., Redmond, WA (US)
Filed on Jun. 1, 2020, as Appl. No. 16/889,246.
Claims priority of provisional application 62/855,143, filed on May 31, 2019.
Claims priority of provisional application 62/855,151, filed on May 31, 2019.
Claims priority of provisional application 62/855,147, filed on May 31, 2019.
Prior Publication US 2020/0381985 A1, Dec. 3, 2020
Int. Cl. H02K 16/00 (2006.01); B64D 27/24 (2006.01); B64D 31/02 (2006.01); B64D 33/08 (2006.01); B64D 41/00 (2006.01); F16H 57/04 (2010.01); H02J 7/34 (2006.01); H02K 5/20 (2006.01); H02K 5/22 (2006.01); H02K 7/116 (2006.01); H02K 9/197 (2006.01); H02K 11/21 (2016.01); H02K 11/30 (2016.01); H02P 6/10 (2006.01); H02P 25/16 (2006.01); H02P 27/08 (2006.01)
CPC H02K 16/00 (2013.01) [B64D 27/24 (2013.01); B64D 31/02 (2013.01); B64D 33/08 (2013.01); B64D 41/00 (2013.01); F16H 57/0476 (2013.01); H02J 7/345 (2013.01); H02K 5/203 (2021.01); H02K 5/225 (2013.01); H02K 7/116 (2013.01); H02K 9/197 (2013.01); H02K 11/21 (2016.01); H02K 11/30 (2016.01); H02P 6/10 (2013.01); H02P 25/16 (2013.01); H02P 27/08 (2013.01); B64D 2221/00 (2013.01); H02K 2213/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A system to convert electrical power to torque configured as a propulsion system, the system comprising:
at least two motor controllers, each motor controller adapted and configured to receive power input commands and to receive direct-current (DC) input power and convert the DC input power to multiphase alternating-current (AC) output power, wherein each motor controller varies its respective multiphase AC output power in response to the power input commands received and each of the at least two motor controllers has a housing;
an electric motor assembly having a main shaft for supplying torque to a propulsor element of an aircraft, the electric motor configured and adapted to receive input power as multiphase AC from the at least two motor controllers to rotate the main shaft, wherein the electric motor assembly comprises one or more stator modules, each stator module having a plurality of stator windings configured to receive the AC output power from the at least two motor controllers;
a governor interface assembly to adjust the pitch of the propulsor element, wherein the governor interface derives a speed reference of the propulsor element from the main shaft of the electric motor assembly and utilizes hydraulic fluid to adjust the pitch of the propulsor element; and
a liquid cooling system having a liquid coolant, wherein the liquid cooling system is configured to direct the liquid coolant to flow through the plurality of stator windings in at least one of the one or more stator modules to cool the plurality of stator windings in the at least one of the one or more stator modules and so that the same liquid coolant that flows through the plurality of stator windings flows through the housing of the at least two motor controllers in parallel to cool the at least two motor controllers and through the electric motor assembly in series with the at least two motor controllers, and wherein the hydraulic fluid used to adjust the pitch of the propulsor element is the same fluid used in the cooling system.