Patent ID: 6707184
Filing Date: 2004-03-16
Classification: H02J,H02M,H02P

Abstract:
A vehicle AC generator for charging a battery comprising:a rotor having a permanent magnet; a stator having an armature winding for generating AC power, said armature winding having a number of turns; a rectifier for converting said AC power of said armature winding to DC power; means for short-circuiting said armature winding to provide short-circuit current in said armature winding when said armature winding is connected to said battery through said rectifier; and means for interrupting the short-circuit current, wherein the means for interrupting the short-circuit current cyclically interrupts the short-circuit current to generate fly back voltage for charging said battery and continuously interrupts the short-circuit current to avoid charging the battery, and wherein the number of turns is such that the generator generates a no-load voltage that is lower than a terminal voltage of said battery when said rotor rotates at a regular speed and said means for interrupting the short-circuit current continuously interrupts the short-circuit current.