ELECTRICAL MACHINE MULTIPOLE ROTOR Russian patent published in 1997 - IPC

FIELD: permanent-magnet electrical machines. SUBSTANCE: monolithic rotor is made in the form of hollow retentive-material barrel with external radius R₂ whose saturation 1 at each point is found from expression , where p is pole pair number (p ≥ 2); 1 is saturation vector modulus; are unit vectors of polar coordinate system; a is angular coordinate of rotor point; radius R₁ of internal central bore is found from equation , where b=0.0055; c=0.993; d=3.261. EFFECT: improved efficiency of retentive material application. 2 dwg, 1 tbl