SOLID ROTOR OF ELECTRICAL MACHINE Russian patent published in 1998 - IPC

FIELD: electrical and electromechanical engineering, variable induction motors operating in transient modes. SUBSTANCE: rotor has circular and axial grooves of definite size spaced apart at definite distances, their width being $$$, depth, $$$, $$$, and distance between circular and axial grooves, $$$, respectively, where $$$ is air gap; $$$ is mean depth of penetration of first pair of tooth harmonics into rotor; $$$ is pole pitch. Circular grooves are filled with ferromagnetic dielectric material through entire depth and axial grooves are filled with electricity conducting material through height $$$. EFFECT: reduced vibration and noise. 2 dwg