SYSTEM FOR STABILISING A SUPPLY VOLTAGE OF AN ON-BOARD ELECTRICAL SYSTEM OF A MOTOR VEHICLE

摘要

The system of the invention is of the type consisting in limiting a variation in the voltage of a battery (3) powering the on-board electrical system (2) at the moment when a heat engine of the vehicle is started using an electric starter (4) connected to said system (2). The system of the invention includes a resistor (6) that can vary according to the voltage variation, said variable resistor (6) being connected in series with the battery (3) and the starter (4). According to another feature of the invention, the variable resistor (6) is controlled by a main current loop (7) according to a reference current intensity (Iref) generated by a voltage loop (8) according to the voltage variation in relation to a reference voltage (Uref). The variable resistor (6) is typically formed by multiple power transistors in parallel.