PROCESS AND DEVICE FOR OPERATING AS ON-BOARD CHARGING SET THE INVERSE RECTIFIER OF THE THREEPHASE CURRENT DRIVE OF AN ELECTRIC CAR

摘要

A method and a device for operating, as on-board charger group, the inverter (4) of the three-phase current drive (2) of an electric car. During charging, two bridged branches (18, 22) of the inverter (4) function as boosters, so as to supply a direct voltage (Ud) to an intermediate capacitor (16) of the inverter (4) in operation a supply compatible with the network. Another bridge branch (20) of the inverter functions as a step-down, so that the supply battery (10) of the electric car receives a charging current supplied by the intermediate capacitor (16) according to a characteristic. charging the battery. By thus adding simple elements, it is possible to use the inverter (4) of the three-phase current drive (2) of an electric car as on-board charger group, which makes it possible to reduce the volume and the weight compared to known electric cars.