Patent ID: 6281613
Filing Date: 2001-08-28
Classification: H02K

Abstract:
An AC generator for charging a vehicle battery comprising:a stator having a stator winding;a rotor having a pair of pole cores with a plurality of claw poles extending axially, a cylindrical field coil enclosed by said claw poles for supplying a magnetic flux to said stator winding, and a plurality of permanent magnets respectively disposed between said claw poles for increasing said magnetic flux supplied to said stator winding;a pulley for transmitting engine rotation to said rotor;a voltage regulator for regulating an output voltage by controlling a field current supplied to said field coil; andmeans, disposed between said pulley and said rotor, for limiting a rotation speed to be transmitted from said pulley to said rotor within a set rotation speed, whereinsaid permanent magnets supply an auxiliary magnetic flux to said stator winding to generate in output voltage that is equal to or lower than a voltage of the battery when said field current is not supplied and said rotor is in said set rotation speed.