ELECTRIC MACHINE ROTOR CURRENT CONDUCTING SHAFT Russian patent published in 1997 - IPC

FIELD: electrical engineering. SUBSTANCE: big electric motor has exciting current feeder 5, 6 made inside rotor shaft along axial direction so feeding wires of excitation winding frontal section are under strong action of mechanical and electrical strengths but if current conducting axis 1 in shaft tube 2 has at least three slots 13 made in longitudinal direction and deepened in radial direction up to axial part then shaft is being more flexible in transverse direction and simultaneously possibility of axial rotor shaft cooling will be obtaining. EFFECT: more effective electric machine cooling, more long electric machine life time. 4 cl, 2 dwg