Patent ID: 8138728

Claim:
An apparatus for controlling electric power generation for vehicles, which controls energization of an excitation winding of a generator driven by an internal-combustion engine controlled by a controller to control output voltage of the generator, comprising: a restraining unit that restrains electric power generation of the generator in response to a given signal; a releasing unit that releases the restraint by the restraining unit when generated voltage of the generator is equal to or less than a first predetermined value; a detecting unit that detects starting of the internal-combustion engine; a measuring unit that measures elapsed time from the detection of the starting by the detecting unit; and a prohibiting unit that prohibits the release of the restraint by the releasing unit until a predetermined time is measured by the measuring unit, wherein the restraining unit restrains the electric power generation by limiting electric conductivity of exciting current of the generator to a value corresponding to the given signal, and the releasing unit prohibits the release of the restraint only when a limit value of the electric conductivity of the excitation current of the restraining unit is equal to or less than a second predetermined value.