Patent ID: 6664767
Filing Date: 2003-12-16
Classification: H02J,H02P,Y02T

Abstract:
A voltage regulator of a vehicle AC generator including a field circuit having a field coil and a plurality of magnetic poles and a output circuit having an armature coil, said voltage regulator comprising:first means, having an input terminal and a detection line connecting said input terminal and said armature coil, for detecting a self-excited voltage that is induced in said armature coil by a residual magnetic flux of said rotor; second means for supplying field current to said field coil when said self-excited voltage is detected by said first means; a bypass circuit having a variable resistance, connected between said input terminal and a ground, for bypassing leak current flowing in said armature to the ground; and third means for decreasing said variable resistance of said bypass circuit when said self-excited voltage is not detected and increasing said variable resistance of said bypass circuit when said self-excited voltage is detected.