Patent ID: 7348699

Claim:
A canned motor comprising a rotor ( 10 ) having a rotor shaft ( 24 ); a can ( 18 ) having a cylindrical wall sealed at one end; a stator ( 12 ), the can ( 18 ) interposed between the rotor ( 10 ) and the stator ( 12 ); and a resolver for measuring the rotational position, the rotational speed or the rotational direction of the rotor ( 10 ), the resolver having a resolver rotor ( 14 ) that rotates with the rotor and a stationary annular resolver stator ( 16 ) separated from the resolver rotor ( 14 ) by an air gap, wherein the cylindrical wall of the can ( 18 ) has a section ( 34 ) having a smaller radius which is interposed between the resolver rotor ( 14 ) and the resolver stator ( 16 ).