VOLTAGE CONTROLLER OF ALTERNATOR FOR VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a voltage controller of an alternator in a vehicle which controls attenuation of residual magnetization of iron core of the alternator for the vehicle and thereby can increase the induced voltage by residual magnetization which may be used in various purposes. SOLUTION: In the technology for detection the rotation by utilizing residual magnetization of an iron core, when a field current is gradually attenuated through a circulation diode 72 during the deceleration period for stopping the rotation, such field current is attenuated through the AC demagnetization effect. Therefore, supply of power source voltage to a control circuit 73 can be maintained even during the deceleration period.