MULTIPHASE ELECTRICAL MACHINE Russian patent published in 1996 - IPC

FIELD: contactless electric drives. SUBSTANCE: multiphase electrical machine has stator built up of two groups of axially arranged annular or four arc toothed cores. First and third cores are not offset in respect to each other and form transformer group. Second and fourth cores offset in respect to them through pole pitch form motor group of stator, nor are they offset relative to each other. Cores carry annular or arc windings. Each stator group has additional toothed and wound cores. Each group has four arc cores and four or two annular cores. Winding placed on middle part of transformer group is to be connected to single-place AC supply mains; two windings of the same group placed on extreme cores of group are connected through rectifiers to winding of middle part of motor group built up of two parallel circuits. In arc cores, groups are displaced through 2πm rad relative to each other, where m is number of phases. In annular cores, groups are displaced axially relative to each other. Rotor is toothed unwound structure. Rotor tooth pitch equals that of stator. Rotor has two parts of each group. With motor group having four cores, group rotors are similar and made of longitudinal magnetically conductive bars. With two-core motor groups, rotors are built of permanent-magnet bars placed in polarity-alternating manner around rotor circumference. EFFECT: improved design. 5 dwg