COMPOSITE WINDING OF ALTERNATING-CURRENT MACHINE Russian patent published in 2002 - IPC

FIELD: electrical engineering; electrical machines with saturable steel core supplied with three-phase current. SUBSTANCE: one part of winding is star-connected and other one is connected in delta; these parts are spaced apart through ρ, where m is integer number; πm/3ρ is number of pole pairs; winding pitch β is shortened or enlarged within the range of 0,5<β<1,5 except for β = 1 and/or winding is distributed. EFFECT: reduced loading of delta-connected part of winding; reduced dependence of delta-connected part overload on supply voltage. 3 cl, 3 dwg