Patent ID: 6339274
Filing Date: 2002-01-15
Classification: H02K

Abstract:
An electric motor rotor with permanent magnets, said rotor including a core (10) having a cylindrical lateral surface, against which are seated magnets (20) having opposite lateral edges (21), characterized in that it comprises a pair of annular caps (40), each cap being seated and affixed to an adjacent end face (12) of the core (10), said annular caps (40) limiting axial displacements of the magnets and defining, for both directions of circumferential displacement, stops for the circumferential displacement for each magnet (20), the opposing lateral edges (21) of a pair of consecutive magnets (20) being positioned by said annular caps (40), in order to define a previously established minimum circumferential distance, each annular cap (40) comprising positioning means (42), each one limiting the circumferential displacement of a respective magnet (20) in one direction of circumferential displacement, each magnet (20) having its circumferential displacement limited in both directions by two circumferential displacement limiting stops (42), each said limiting stop provided in one of the annular caps (40), said circumferential displacement limiting stops (42) which act on the same magnet (20) being seated against diagonally opposite end portions of lateral edges (21) of said magnet (20).