US 12,381,432 B2
Fault tolerant redundant electric motor
Robert P. Gerbetz, Waukegan, IL (US); and Richard Fosdick, Clarence Center, NY (US)
Assigned to Moog Inc., East Aurora, NY (US)
Appl. No. 18/012,601
Filed by Moog Inc., East Aurora, NY (US)
PCT Filed Jul. 19, 2021, PCT No. PCT/US2021/042187
§ 371(c)(1), (2) Date Dec. 22, 2022,
PCT Pub. No. WO2022/020240, PCT Pub. Date Jan. 27, 2022.
Claims priority of provisional application 63/053,790, filed on Jul. 20, 2020.
Prior Publication US 2023/0253846 A1, Aug. 10, 2023
Int. Cl. H02K 3/28 (2006.01); H02K 11/33 (2016.01); H02K 21/16 (2006.01)
CPC H02K 3/28 (2013.01) [H02K 21/16 (2013.01); H02K 11/33 (2016.01); H02K 2213/06 (2013.01)] 24 Claims
OG exemplary drawing
 
1. An electric motor assembly comprising:
a stator;
a rotor mounted for movement about a longitudinal axis relative to said stator;
said rotor comprising at least one permanent magnet;
a radial air gap between said stator and said rotor;
said stator comprising a plurality of circumferentially spaced stator teeth orientated radially about said longitudinal axis and extending axially along said longitudinal axis;
said stator comprising a plurality of circumferentially spaced stator slots orientated radially about said longitudinal axis and extending axially along said longitudinal axis between said plurality of stator teeth;
said stator comprising a first electromagnetic winding disposed in a first slot set of said plurality of stator slots and operatively configured to be selectively energized to exert a torque on said rotor;
said stator comprising a second electromagnetic winding disposed in a second slot set of said plurality of stator slots separate from said first slot set and operatively configured to be selectively energized to exert a torque on said rotor separate from said first electromagnetic winding;
a first motor drive operatively configured to control said first electromagnetic winding;
a second motor drive operatively configured to control said second electromagnetic winding;
said first electromagnetic winding comprising a first coil disposed in a first pair of slots in said first slot set of said plurality of stator slots and a second coil disposed in a second pair of slots in said first slot set of said plurality of stator slots;
said first coil of said first electromagnetic winding comprising a first number of turns in said first pair of slots in said first slot set of said plurality of stator slots;
said second coil of said first electromagnetic winding comprising a second number of turns in said second pair of slots in said first slot set of said plurality of stator slots that is greater than said first number of turns in said first pair of slots in said first slot set of said plurality of stator slots;
said second electromagnetic winding comprising a third coil disposed in a third pair of slots in said second slot set of said plurality of stator slots and a fourth coil disposed in a fourth pair of slots in said second slot set of said plurality of stator slots;
said third coil of said second electromagnetic winding comprising a third number of turns in said third pair of slots in said second slot set of said plurality of stator slots; and
said fourth coil of said second electromagnetic winding comprising a fourth number of turns in said fourth pair of slots in said second slot set of said plurality of stator slots that is greater than said third number of turns in said third pair of slots in said second slot set of said plurality of stator slots.