BOREHOLE GENERATOR ROTOR Russian patent published in 2002 - IPC

FIELD: electrical engineering; electromechanical power sources of inclination metering systems. SUBSTANCE: rotor has inductor and composite shaft. The latter has two nonmagnetic hubs joined together by means of stud. Hubs are provided with seats for bearings; driving hub has shank for coupling with turbine. Inductor is assembled of annular permanent magnets with central bore passing the stud; annular magnets have projection along diameter on one end surface and slot on other end surface; similar slot is provided in driving hub for joining with adjacent annular magnets. Second hub having smooth end surface is turned onto stud and secures magnets and driving hub to form integral part. EFFECT: twice as high power of generator having same size. 2 dwg