Patent ID: 9130431
Filing Date: 2015-09-08
Classification: H02K

Abstract:
1. A stator for a rotary electrical machine having multi-phases, comprising: a ring-shaped stator core having a circumferential direction and plurality of slots formed to be arranged in the circumferential direction; and a stator winding having a plurality of phase windings assigned to the multi-phases respectively, each phase winding being divided into N-number of divided phase windings, N being a natural number of two or higher, each of the N-number of divided phase windings being composed of a plurality of segment conductors disposed to be inserted in corresponding ones of the slots, the plurality of segment conductors of each of the N-number of divided phase windings being electrically connected in series to each other and the plurality of segment conductors of the N-number of divided phase windings assigned to the same phase being in parallel with each other, wherein each of the segment conductors has an insulating film that provides electrical insulation on a surface thereof, and the segment conductors of the N-number of divided phase windings of the same phase winding are i) stacked in, of the slots, N-number of mutually adjacent slots which are different in voltage phase from each other and which are assigned to each of magnetic poles of a rotor opposed to the stator with a gap therebetween, and ii) disposed alternatively to be positioned every “N−1”-number of radial layers in each of the N-number of mutually-adjacent slots assigned to each of the magnetic poles of the rotor such that a total of voltages induced by the plurality of segment conductors in each of the N-number of mutually-adjacent slots becomes equal to each other.