Magnetoelectric generator

摘要

A magnetoelectric generator includes a bowl-like flywheel ( 3 ) having a bottom portion ( 6 ) formed with ventilation holes ( 20 ), a plurality of permanent magnets ( 7 ) secured to an inner circumferential surface of the flywheel ( 3 ), a stator core ( 10 ) disposed within the flywheel ( 3 ) and having peripheral side surfaces facing the permanent magnets ( 7 ), and a coil assembly ( 11 ) implemented by winding an electric conductor on the core ( 10 ). Electricity is induced in the coil assembly ( 11 ) by AC magnetic field produced by rotating the flywheel ( 3 ). A peripheral edge portion of each ventilation hole ( 20 ) is formed with a projecting portion ( 21 ) by plastic deformation, which protrudes toward the coil assembly ( 11 ) for producing turbulent air flows internally of the flywheel ( 3 ) upon rotation of the flywheel ( 3 ).