SPLIT-PHASE AC MOTOR Russian patent published in 1997 - IPC

FIELD: low-power induction and synchronous motors. SUBSTANCE: motor stator magnetic core has split toroidal yoke, cylindrical magnetic casing, and three poles laminated from plates whose planes are parallel to plane crossing axis of particular pole and motor axis; yoke and magnetic casing are laminated in standard manner from sheets whose planes are perpendicular to machine axis; poles are installed in slots made on external surface of cylindrical casing; two poles are placed on diametrically opposite sides and third pole is installed between them; made in casing diametrically to middle pole is slit and four projections are provided on external surface of casing, their radial axes being inclined through 45 deg. to pole axes; toroidal split yoke is press-fitted onto casing projections and on poles; one phase of winding incorporates two coils placed on either side of middle pole; other phase is split into two phases, each including two coils wound on either side of each of two other poles. EFFECT: reduced input of active materials, facilitated manufacture, reduced labour consumption, improved performance characteristics. 1 dwg