US 12,348,099 B2
Electric machine end winding design without conductor overlap
Becky Sue Morris, Canton, MI (US); and Franco Leonardi, Dearborn Heights, MI (US)
Assigned to Ford Global Technologies, LLC, Dearborn, MI (US)
Filed by FORD GLOBAL TECHNOLOGIES, LLC, Dearborn, MI (US)
Filed on Dec. 22, 2022, as Appl. No. 18/086,855.
Prior Publication US 2024/0213840 A1, Jun. 27, 2024
Int. Cl. H02K 3/28 (2006.01)
CPC H02K 3/28 (2013.01) 16 Claims
OG exemplary drawing
 
1. An electric machine comprising:
a stator core defining slots having a number of radial positions; and
a winding disposed in the core and having three phases, each of the phases having at least two parallel paths including hurdle-shaped conductors interconnected to form at least two continuous circuits between a terminal and a neutral, each of the hurdle-shaped conductors including first and second uprights disposed in a different one of the slot nd a bridge connecting between the uprights and extending circumferentially over an end surface of the core, wherein the bridges are stacked one on top of the other such that the winding has upper and lower layers, and wherein the bridges have variable thickness such that a number of bridges, at each of the upper and lower layers, extending over one of the slots exceeds the number of radial positions of that slot, wherein each of the paths includes one turn-around conductor that is disposed in a different one of the upper and lower layers than the other of the conductors of the path.