DEVICE AND METHOD FOR STABILISING VOLTAGE APPLIED TO A FIRST ELECTRIC CONSUMER ARRANGED IN A VEHICLE ELECTRICAL SYSTEM

摘要

The invention relates to a device and to a method for stabilising voltage (U2, U2') applied to a first electric consumer (42, 42') arranged in a vehicle electrical system (38, 38'). As long as the voltage (U2, U2') is not required to be stabilised, the control unit (30, 30') controls the switching device (46, 46') in such a manner that the first electric consumer (42, 42') is connected to the first voltage tension supply unit (40, 40') and as soon as a stabilisation is required, the first electric consumer (42, 42') is connected to a series circuit formed by the storage unit (34, 34') and the first voltage supply unit (40, 40'). Following the stabilisation, the second voltage supply unit (36, 76) supplies a charge voltage (U1, U1') if the value is higher than the supply voltage (U2, U2'). An electric current flows from the second voltage supply unit (36, 76) through the second electric consumer (44, 44'). The storage unit (34, 34') can also be charged.