초록 ▼

A voltage control apparatus for a vehicle-onboard electric generator in which wirings inclusive of connectors of the motor vehicle are much simplified to allow the manufacturing cost to be reduced significantly while making the trigger signal constantly available without difficulty even when abnorma

A voltage control apparatus for a vehicle-onboard electric generator in which wirings inclusive of connectors of the motor vehicle are much simplified to allow the manufacturing cost to be reduced significantly while making the trigger signal constantly available without difficulty even when abnormality takes place in association with the charge lamp. The voltage control apparatus includes a voltage control circuit (1A) for controlling a generated voltage of a vehicle-onboard electric generator (2), an external control unit (5A) for supplying a trigger signal to the voltage control circuit (1A), and a single signal line for electrically interconnecting a first terminal of the voltage control circuit (1A) and a first port of the external control unit (5A), wherein the external control unit (5A) is so designed as to output the trigger signal to the voltage control circuit (1A) by way of the single signal line, and wherein the voltage control circuit (1A) is so designed that upon occurrence of abnormality in the vehicle-onboard electric generator (2), the voltage control circuit (1A) informs the external control unit (5A) of abnormality occurrence status through the medium of the single signal line.

대표청구항 ▼

[ What is claimed is:] [1.]1. A voltage control apparatus for a vehicle-onboard electric generator, comprising:a vehicle-onboard electric generator driven by an internal combustion engine and including an armature coil and a field coil;a voltage control circuit including an output transistor for con

[ What is claimed is:] [1.]1. A voltage control apparatus for a vehicle-onboard electric generator, comprising:a vehicle-onboard electric generator driven by an internal combustion engine and including an armature coil and a field coil;a voltage control circuit including an output transistor for controlling a voltage appearing across said field coil to thereby control a generated voltage of said vehicle-onboard electric generator;an external control unit having an output for supplying a trigger signal to said voltage control circuit; anda single signal line for electrically interconnecting a first terminal of said voltage control circuit and a first port of said external control unit,wherein said external control unit is so designed as to output the trigger signal to said voltage control circuit by way of said single signal line, andwherein said voltage control circuit is so designed that upon occurrence of abnormality in association with said vehicle-onboard electric generator, said voltage control circuit informs said external control unit of abnormality occurrence status through the medium of said single signal line.