ELECTRICAL MACHINE ARMATURE WINDING Russian patent published in 2006 - IPC H02K3/12 H02K3/04 

FIELD: electrical engineering; low-power electrical machines running under severe switching conditions.

SUBSTANCE: electrical machine armature winding is wound of multiturn sections incorporating series-connected coils placed under all poles so that closest sides of adjacent coils are spaced one tooth pitch apart and any two adjacent coils are wound in opposite directions; coil number in section is greater than pole number; coils disposed under any pole are shifted along armature slots through one tooth pitch and are equally spaced apart on armature. Armature coil pitches under adjacent poles differ by one tooth pitch with odd number of slots and even number of coils per pole pair or with even number of slots and odd number of coils per pole pair. In case of even number of armature slots and odd number of coils per pole pair armature coil pitch is greater under pole wherein coil number is greater. The result is that coils of each section are distributed both under different poles and under separate pole thereby providing for greater number of section coils than pole number of electrical machine and, hence, section inductance is reduced. Essential part of active coil sides of each preceding section is disposed in this case in same slots as active coil sides of next sections thereby enhancing mutual magnetic coupling between adjacent sections.

EFFECT: facilitated switching of armature winding sections and enhanced damping properties of winding.

1 cl, 6 dwg