Patent ID: 7458214

Claim:
An electric motor cartridge ( 1 ) configured for insertion in a housing and to drive a compressor wheel, the electric motor cartridge ( 1 ) comprising: a first cartridge housing portion ( 2 ); a second cartridge housing portion ( 3 ); and a rotor ( 21 ); the cartridge housing portions ( 2 , 3 ) being coupled together so as to assemble the electric motor cartridge ( 1 ) by radially and axially encapsulating a stator ( 4 ) there between, wherein each cartridge housing portion ( 2 , 3 ) has a semi-shell shape substantially comprised by a bottom portion ( 5 , 6 ) and a cylindrical wall portion ( 7 , 8 ), wherein at least one of the cylindrical wall portions ( 7 , 8 ) forms a contact ( 14 , 15 ) upon insertion of the assembled electric motor cartridge ( 1 ) in a housing, wherein one of the bottom portions ( 6 ) forms part of a fixed encapsulation barrier between the stator ( 4 ) and a compressor wheel to be driven by the assembled electric motor cartridge ( 1 ), wherein each cartridge housing portion ( 2 , 3 ) provides a bore ( 12 , 13 ) in the center of its bottom portion ( 5 , 6 ), characterized in that the rotor ( 21 ) has peripheral portions ( 22 , 23 ) inserted through the bores ( 12 , 13 ) of the cartridge housing portions ( 2 , 3 ) and a through hole axially extending through the rotor ( 21 ) and its peripheral portions ( 22 , 23 ) for inserting a shaft ( 34 ) through the rotor ( 21 ).