A vehicle alternator control device (1) has a power transistor (11), a flywheel diode (12), a voltage control circuit (13), a primary power supply circuit (14), and a secondary power supply circuit (15). When the alternator 2 starts rotation, the secondary...

A control voltage is set to an acceleration control voltage which is higher than a battery voltage V by a predetermined voltage difference DELTA V1 within a range and delayed by a predetermined time DELTA T1 during acceleration at low speeds. During accele...

A multi-function regulator (MFR) regulates generator voltage. A central on-board computer (ZBR) has terminal voltage in an accumulator, output voltage from a generator and speed of an internal combustion engine as input signals. The central on-board comput...