Patent ID: 6555993
Filing Date: 2003-04-29
Classification: H02J,H02P

Abstract:
A voltage regulating system for charging a battery of a nominal voltage comprising:a rotor having a magnetic poles therewith, a field coil, an armature winding having a plurality of output terminals for providing multi-phase output voltage, a full-wave rectifier unit connected to said plurality of output terminals, a rotation detection unit, a voltage control unit for controlling current supplied to said field coil, wherein said rotation detection unit comprises a comparator connected to one of said plurality of output terminals, a first means for providing a first threshold voltage that is higher than negative side voltage of said battery and lower than a half of said nominal voltage and a second means for providing a second threshold voltage that is lower than said nominal voltage and higher than said half of said nominal voltage, and said comparator compares voltage of said one of said plurality of output terminals generated while no current is supplied to said field coil with one of said first threshold voltage and second threshold voltage.