COMMUTATOR ELECTRICAL MACHINE WITH EVEN NUMBER OF POLE PAIRS Russian patent published in 1995 - IPC

FIELD: permanent-magnet excited commutator motors. SUBSTANCE: commutator electrical machine with even number of pole pairs (p) has inductor with poles, brushes installed on two brush studs and coming in contact with maximum two commutator bars, armature carrying plain wave winding having equal first and second winding pitches with as many coils in slotted armature as there are slots there, and commutator with number of bars K. Brushed of both polarities are distributed over commutator circumference and spaced (0,5K-0,5(K∓ 1)·p^-1) commutator pitches apart for transposed and non-transposed winding, respectively, inductor has pole pitches of different lengths two pitches being, also to comply with condition of 180(K∓ p∓ 1)·(pK)^-1 geometric degrees with (2p-2) pitches of 180·(K∓ 1)(pK)^-1 geometric degrees inbetween in quantity p on one side and (p-2) on other side. Pole arcs in two above-given first pole pitches differ from remaining pole arcs by value equal in limit to difference in pole pitches and amounts to 1/2K-th part of inductor bore circumference. EFFECT: improved design. 4 dwg