INDUCTION MACHINE Russian patent published in 1996 - IPC

FIELD: electrical engineering. SUBSTANCE: induction machine has stator with main magnetic circuit 1 and ac winding 2 and rotor with main magnetic circuit 12 and winding 13. Stator has auxiliary magnetic circuit 3 with nonmagnetic rings 4 and 20 and unipolar field windings 5 and 6. Rotor incorporates first auxiliary magnetic circuit 14 with winding 15, second toothed auxiliary magnetic circuit 16, and third auxiliary magnetic circuit 18. Third auxiliary magnetic circuit of rotor is placed between auxiliary magnetic circuits 14 and 16. Sealed annular chambers 21 and 22 are arranged inside stator auxiliary magnetic circuit. Hollow ferromagnetic cores 7,8, and 22 and liquid-metal contacts 23 are placed into these chambers. Ferromagnetic cylinders 7,8,25 are free to rotate. Sealed chambers may be filled with inert gas. EFFECT: improved design. 2 cl, 3 dwg