초록 ▼

An electric motor comprises a stator having a plurality of conductive windings radially spaced about a central axis. The motor includes a rotor located radially inward of the stator and rotationally fixed with respect to a shaft disposed along the central axis. The rotor defines an area in which, up

An electric motor comprises a stator having a plurality of conductive windings radially spaced about a central axis. The motor includes a rotor located radially inward of the stator and rotationally fixed with respect to a shaft disposed along the central axis. The rotor defines an area in which, upon rotation of the rotor, a low pressure vacuum is created drawing air radially outward, with respect to the rotor, from the area. The rotor also includes an annular plate disposed at a transverse end of the rotor coaxial with the shaft. The annular plate defines at least one hole extending axially through the annular plate and in pneumatic communication with the area. The hole is configured so air is drawn by the low pressure vacuum through the hole to the area.

대표청구항 ▼

[ What is claimed is:] [1.] An electric motor, said motor comprising:a stator having a plurality of conductive windings radially spaced about a central axis; anda rotor located radially inward of said stator and rotationally fixed with respect to a shaft disposed along said central axis, said rotor

[ What is claimed is:] [1.] An electric motor, said motor comprising:a stator having a plurality of conductive windings radially spaced about a central axis; anda rotor located radially inward of said stator and rotationally fixed with respect to a shaft disposed along said central axis, said rotor defining an area in which, upon rotation of said rotor, a low pressure vacuum is created drawing air radially outward, with respect to said rotor, from said area,wherein said rotor includes an annular plate disposed at a transverse end of said rotor coaxial with said shaft, andwherein said annular plate defines at least one hole extending axially through said annular plate between radially inner and outer edges of said annular plate and in pneumatic communication with said area, said hole including at least one side portion disposed at an acute angle with respect to a plane normal to said central axis so that air is drawn by said low pressure vacuum through said hole to said area.