Patent ID: 6137199
Filing Date: 2000-10-24
Classification: F02B,H02K

Abstract:
An alternator for supporting a DC electrical system of an internal combustion engine, comprising:a rotor assembly for producing an alternating current of high magnitude and low voltage, said rotor assembly having a cylindrical hub integrally formed with a flywheel, said flywheel being formed at a first end of said cylindrical hub and concentric with a longitudinal axis of said cylindrical hub, a plurality of primary permanent magnets fixedly mounted on an outer surface of said cylindrical hub toward a second end thereof opposite said flywheel, wherein said permanent magnets being operatively positioned so as to generate a continuous ring of alternating high flux density magnetic field along a primary flux path, a plurality of blocking pole permanent magnets fixedly mounted on the outer surface of said cylindrical hub and adjacent said plurality of primary magnets, and means for operatively connecting said first end of said rotor assembly to a crankshaft of an internal combustion engine such that an axis of rotation of said crankshaft is coincident with said longitudinal axis of said cylindrical hub; anda stator assembly having a cylindrical core, a plurality of stator poles fixedly formed along a cylindrical inner surface of said core, and a stator winding circuit wound through said plurality of stator poles, whereinsaid stator assembly is operatively positioned with said rotor assembly such that said primary magnets of said rotor assembly are rotatively aligned with and surrounded by said stator poles of said stator assembly,said primary magnets are operatively positioned so as to generate a continuous alternating high flux density magnetic field along a primary flux path, andsaid blocking pole magnets are operatively positioned so as to force leakage and fringing fluxes into the primary flux path.