COMMUTATOR MACHINE ARMATURE Russian patent published in 1998 - IPC

FIELD: electrical machine design. SUBSTANCE: sections of separate coils arranged on either side of armature diameter are provided with additional coils shifted through one tooth pitch in direction of armature rotation at first sections of slots and in opposite direction at last sections of slots. In the process, higher magnetic coupling is ensured between last sections of slots and next ones in commutation sequence. Section coils are placed in different armature slots which reduces their inductance. EFFECT: reduced arcing energy at wiping contact of electrical machine. 8 dwg