Rotor assembly with heat pipe cooling system
First Claim
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1. An electric motor cooling system, comprising:
- an electric motor rotor assembly comprised of a core assembly rigidly coupled to a rotor shaft, said rotor shaft comprising;
a first end of said rotor shaft, wherein said first end is closed;
a second end of said rotor shaft distal from said first end, wherein said second end of said rotor shaft includes at least one opening;
a least one hollow region within said rotor shaft and extending from said at least one opening in said second end towards said first end of said rotor shaft;
at least one heat pipe, wherein a first portion of said at least one heat pipe is captured within said at least one hollow region within said rotor shaft, wherein said first portion of said at least one heat pipe is thermally coupled to said rotor shaft, and wherein a second portion of said at least one heat pipe extends out of and beyond said at least one opening in said second end of said rotor shaft; and
a heat exchanger thermally coupled to said second portion of said at least one heat pipe;
wherein said at least one hollow region is comprised of a single hollow region within said rotor shaft, wherein a first centerline corresponding to said single hollow region is co-axial with a second centerline corresponding to said rotor shaft, and wherein said at least one heat pipe is comprised of a plurality of heat pipes captured within said single hollow region.
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Abstract
An electric motor cooling system is provided in which at least one heat pipe is captured within at least one hollow region within the motor'"'"'s rotor shaft. An end of the heat pipe that extends out and away from the end of the rotor shaft is coupled to a heat exchanger, for example a heat sink in which the fins of the heat sink are shaped as fan blades. During motor operation, as the rotor heats up thermal energy is absorbed by the heat pipe within the rotor shaft and transferred to the heat sink for efficient removal.
25 Citations
21 Claims
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1. An electric motor cooling system, comprising:
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an electric motor rotor assembly comprised of a core assembly rigidly coupled to a rotor shaft, said rotor shaft comprising; a first end of said rotor shaft, wherein said first end is closed; a second end of said rotor shaft distal from said first end, wherein said second end of said rotor shaft includes at least one opening; a least one hollow region within said rotor shaft and extending from said at least one opening in said second end towards said first end of said rotor shaft; at least one heat pipe, wherein a first portion of said at least one heat pipe is captured within said at least one hollow region within said rotor shaft, wherein said first portion of said at least one heat pipe is thermally coupled to said rotor shaft, and wherein a second portion of said at least one heat pipe extends out of and beyond said at least one opening in said second end of said rotor shaft; and a heat exchanger thermally coupled to said second portion of said at least one heat pipe; wherein said at least one hollow region is comprised of a single hollow region within said rotor shaft, wherein a first centerline corresponding to said single hollow region is co-axial with a second centerline corresponding to said rotor shaft, and wherein said at least one heat pipe is comprised of a plurality of heat pipes captured within said single hollow region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An electric motor cooling system, comprising:
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an electric motor rotor assembly comprised of a core assembly rigidly coupled to a rotor shaft, said rotor shaft comprising; a first end of said rotor shaft, wherein said first end is closed; a second end of said rotor shaft distal from said first end, wherein said second end of said rotor shaft includes at least one opening; a least one hollow region within said rotor shaft and extending from said at least one opening in said second end towards said first end of said rotor shaft; at least one heat pipe, wherein a first portion of said at least one heat pipe is captured within said at least one hollow region within said rotor shaft, wherein said first portion of said at least one heat pipe is thermally coupled to said rotor shaft, and wherein a second portion of said at least one heat pipe extends out of and beyond said at least one opening in said second end of said rotor shaft; and a heat exchanger thermally coupled to said second portion of said at least one heat pipe; wherein said at least one hollow region is comprised of a plurality of hollow regions within said rotor shaft, wherein each centerline corresponding to each of said plurality of hollow regions is parallel to and spaced apart from a rotor shaft centerline, and wherein said at least one heat pipe is comprised of a plurality of heat pipes corresponding to said plurality of hollow regions. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification