Power generation controller for vehicle generator

摘要

A power generation controller (1), which is for regulating an output voltage of a vehicle generator (2) or a battery voltage of a vehicle battery (3) charged by the vehicle generator (2) by controlling an excitation current flowing into an excitation winding (204) of the vehicle generator (2), includes a switching element (11) connected in series between an output terminal (F) of the vehicle generator (2) and the excitation winding (204), a voltage control circuit (40) on/off controlling the switching element (11) such that one of the output voltage of the vehicle generator (2) and the battery voltage is kept at a target voltage, and a contact abnormality detector circuit (20) detecting a voltage of the output terminal (B) as the output voltage of the vehicle generator (2), and detecting abnormality in a contact state between the power generation controller (1) and the output terminal (B) on the basis of the detected output voltage of the vehicle generator (2).