Patent ID: 9013075
Filing Date: 2015-04-21
Classification: H02K

Abstract:
1. An induction motor rotor core assembly, comprising: a plurality of rotor packages, each rotor package having axial sidewalls, a radial periphery, axial vents passing axially through the rotor packages, and cutouts arranged about the radial periphery adapted to receive rotor bars; and at least one vent spacer positioned between opposing axial sidewalls of the plurality of rotor packages, the at least one vent spacer having a hub and a plurality of individual fins, each individual fin of the plurality of fins coupled directly to the hub, the hub and the plurality of individual fins having a same axial width, and each individual fin of the plurality of fins extending radially from the hub to a location proximate to the radial periphery of the plurality of rotor packages and extending axially to span between the axial sidewalls and form a plurality of radial cooling channels defined by the plurality of fins and the axial sidewalls, wherein the plurality of radial cooling channels extend between the axial vents and the radial periphery, and wherein each individual fin of the plurality of individual fins is positioned between at least two adjacent cutouts of the plurality of rotor packages.