SET FOR INDUCTION HEATING OF MAIN FRAME OF ELECTRIC MACHINE AND INDUCTOR OF SET FOR INDUCTION HEATING OF MAIN FRAME OF ELECTRIC MACHINE Russian patent published in 2001 - IPC

FIELD: electrical engineering, manufacture of electric machines, predominantly, asynchronous motors. SUBSTANCE: set for induction heating of main frame of electric machine includes frame, double-layer table anchored on frame, built-up inductor made of lower immobile U-shaped part of magnetic circuit installed on lower layer of table and of upper mobile U-shaped part coaxial to it and mounted on upper part of frame for vertical movement, induction coils positioned in one of branches as minimum of upper mobile U-shaped and lower immobile U-shaped parts of magnetic circuit. Upper coil is made fast to bracket put on frame and lower coil is made fast to branch of lower immobile part of magnetic circuit. Length of each branch of upper mobile U-shaped part of magnetic circuit of inductor is longer than length of branch of lower immobile U-shaped part of magnetic circuit coaxial to it by value not less than 0.7 height of main frame and not higher than height of main frame. Set is provided with drive of return vertical movement of upper mobile U-shaped part of magnetic circuit of inductor, system of automatic temperature control and warning system. EFFECT: improved uniformity of heating of main frame, prevention of its deformation with heating with simultaneous reduction of energy consumption and increase of productivity. 8 cl, 4 dwg