ELECTRICAL MACHINE ROTOR Russian patent published in 1997 - IPC

FIELD: brushless synchronous machines and electromagnetic couplings. SUBSTANCE: rotor has inductor winding 1 in the form of nonmagnetic hollow conducting barrel with nonmagnetic conducting and ferromagnetic segments alternating over circumference. Conducting segments are shorted out on one end of barrel to form single-turn coils. On other end, they are connected to first pair of end rings 10 and 10 of two polarities. Unipolar exciter is, essentially, ferromagnetic ring 8 with nonmagnetic conducting bars shorted out at ends with end rings 12; exciter is installed in sealed annular chamber 9 filled with liquid metal and mounted on rotor. Magnetic core 19 of unipolar exciter is installed on end shield 21 of electric machine and has toroidal unipolar field winding 20. Sealed chamber 9 is formed by other ferromagnetic ring 13 with nonmagnetic conducting bars with second pair of end rings 15 and 15, hollow nonmagnetic barrels 16 with third pair of end rings 17 and 17. Two rings of second and third pairs 15 and 17 closest to inductor are separated by insulation 18 and other two rings of pairs 15 and 17 are electrically interconnected and joined together. Rings 10 and 10 of first pair are electrically and mechanically connected to closest rings of second and third pairs 15 and 17, respectively. Magnetic core 19 of exciter has additional magnetic system 22 of polarity other than that of other winding 23. EFFECT: improved design. 3 cl, 4 dwg