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

FIELD: electrical engineering; commutator electrical machines.

SUBSTANCE: at least first and last slot sections of armature winding are divided into separate equal-pitch coils offset over armature through equal number of slots; slot pitch of first-section coils is smaller than that of coils of last sections by coil pitch within sections. Part of active sides of coils in each preceding section is disposed in same coils as active coil sides of next sections which ensures high magnetic coupling between adjacent sections.

EFFECT: reduced commutation stress of machine, enlarged service life, enhanced operating reliability of machine.

1 cl, 3 dwg