PURPOSE: To attenuate the vibration occurring in a stator core and reduce the magnetic noise by suppressing the deformation of the stator core, which occurs by the tightening of bolts during time assembling or the body of a generator and the attachment of an engine, and making the magnetic force small.
CONSTITUTION: A magnetic noise reducing device is composed of a semicylindrical inner tube 4, an outer tube 3, and an attenuating material inserted between them, and both ends in axial direction of the outer tube 3 are provided with mounting feet 1 which have through holes 2. For a generator, by mounting these devices in a set of two around a stator core, and making them face each other with a spring washer 13 between so that the fellow through holes 2 provided in the mounting feet 1 may fit each other, and inserting a bolt 12 in the through hole 2, and screwing a nut 15 with a washer 14 bitten at the top, this devices are attached to an AC generator.
TANAKA KIHACHIRO
KURIHASHI YASUTAKA
CHIBA MICHIHARU