ELECTRIC MACHINE Russian patent published in 2000 - IPC

FIELD: electric machine engineering. SUBSTANCE: aim of invention lies in generation of constant component of emf in armature winding by way of electromagnetic conversion without usage of collector or any other commutator. Excitation winding 9 is supplied from alternating voltage source. Magnetic system of electric machine includes poles made in the form of two L-shaped magnetic cores 7 and 8. Each of them has two poles with same permeance joined by guiding rods having size equal to diameter of shaft 3 in plane perpendicular to axis of rotation. Magnetic system is closed through four air gaps between magnetic cores 7 and 8, shaft 3 and armature 5. Armature winding is T-shaped so that each turn has two pairs of active conductors of equal length, one being dropped in slots 4 of shaft 3 and the other one being laid in slots in external surface of armature 5. Turn of armature winding is closed with wires attached to its faces. Outer diameter of armature is A >1 times bigger than diameter of shaft 3. Spatial position of armature winding is so synchronized with phase of induction sinusoid of excitation field that when momentary value of induction is equal to zero axes of excitation windings 9 and armature match. In this case average value of transformer emf in armature winding drops sufficiently. EFFECT: generation of constant component of emf in armature winding by way of electromagnetic conversion. 16 dwg