CPC H02K 1/2706 (2013.01) [B64D 27/24 (2013.01); H02K 1/32 (2013.01); H02K 9/06 (2013.01)] | 18 Claims |
1. A rotor assembly comprising:
a rotor core having an axial length and configured to rotate about a longitudinal axis, the rotor core comprising:
a first wall;
a second wall radially within the first wall and defining a fluid flow path configured to guide a fluid along an inner surface of the first wall; and
an impeller between the inner surface of the first wall and an outer surface of the second wall, wherein the impeller is configured to impart a radial force on the fluid that drives the fluid radially outwards from the longitudinal axis within the fluid flow path.
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