ELECTRIC MOTOR (OPTIONS) Russian patent published in 1997 - IPC

FIELD: low- and medium-power induction and synchronous machines. SUBSTANCE: electric motor has salient-pole stator with four poles and stator winding built up of four concentrated coils, two coils per phase; laminated poles are made of axial plates and axially halved; on external side, halves are joined together through jumper and stator coils are wound either on jumpers or on each pole half; poles are of rectangular section and flush-mounted on internal side in cylindrical shell laminated of plates perpendicular to pole plates; rotor is also halved in axial direction; induction motor has additional end ring placed between two halves of squirrel-cage rotor; synchronous option of motor has field poles of two rotor halves of opposing polarity in any longitudinal section; exciting field can be set up by field winding whose coils are wound on each rotor half or by permanent magnets; round holes provided in magnetic shell in center between pole seats can be used to receive rivets; additional internal slits are made on either side of these holes. EFFECT: reduced input of active materials, improved starting and running characteristics, improved reliability, facilitated manufacture. 10 cl, 4 tbl