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US 12,738,788 B2Granted
Systems and methods for direct winding heat exchanger in motor
AssigneeBorgWarner US Technologies LLC
InventorsEric Bourniche, Pascal David
Life of this patent
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Abstract
A system includes a rotor core; a rotor stack extending circumferentially from the rotor core, the rotor stack including: a first end; a second end opposite to the first end; and a first slot in the rotor stack, the first slot extending from the first end to the second end; and a hairpin cooling pipe in the first slot of the rotor stack.
Claims17
A system comprising a rotor including:
- a rotor core;
- a rotor stack extending circumferentially from the rotor core, the rotor stack including:
- a first end;
- a second end opposite to the first end;
- a first slot in the rotor stack, the first slot extending from the first end to the second end;
- flattened copper wires in the first slot;
- a first cooling channel and a second cooling channel in the first slot, wherein the first cooling channel and the second cooling channel are proximate to and radially outward of a respective pair of the flattened copper wires;
- a hairpin cooling pipe in the first cooling channel and the second cooling channel in the first slot of the rotor stack, wherein the hairpin cooling pipe includes:
- a first elongated portion in the first cooling channel;
- a second elongated portion parallel to the first elongated portion in the second cooling channel;
- and
- a U-shaped connector connecting the first elongated portion to the second elongated portion at the first end of the rotor stack;
- an inlet circuit extending circumferentially around the rotor at the first end of the rotor;
- and
- an outlet circuit extending circumferentially around the rotor at the first end of the rotor.
12 more elements
Dependencies are inferred from the claim text.