THREE-AND-SINGLE-PHASE ELECTRICAL MACHINE COMBINED WINDING Russian patent published in 1995 - IPC

FIELD: electromechanical engineering; rotary converters. SUBSTANCE: combined winding with pole pairs p₁/p₂= 12/9 is placed in Z slots. It is built up of K=36 coil groups with pitch y_n= Z/24. Winding is connected into four parallel stars. It has leads A,B,C for pole pairs p₁. Auxiliary leads 01-02 brought out of neutral points of stars are provided in winding with pole pairs p₂. Groups are series-connected in first phase of first star as follows: 1,13,25; in second star: 10.29.34; in third star: 7,19,31; in fourth star: 16,28,4. Finishing leads of groups 25 and 34 are connected to lead 01; those of groups 31 and 34, to lead 02. Numbers of coil groups alternate in respect to phase A. For phase B they are connected in four groups and for phase C, in eight groups. EFFECT: improved design. 3 dwg