PRECHARGING CIRCUIT FOR CHARGING AN INTERMEDIATE CIRCUIT CAPACITOR

摘要

A precharging circuit (7) for charging an intermediate circuit capacitor (2) is provided having a first electronic component (8), a second electronic component (9) and a diagnostic circuit (14). The diagnostic circuit (14) is designed for functional testing of the first electronic component (8) and/or of the second electronic component (9) and comprises an energy source (21) with a terminal voltage. A voltage drop can be induced on the first electronic component (8) by the energy source (21), as a result of which the functional performance of the first electronic component (8) and/or of the second electronic component (9) can be tested. The diagnostic circuit (14) has a diagnosis switch (20) via which the energy source (21) can be connected to the first electronic component (8) in such a manner that the dropping voltage on the first electronic component (8) corresponds to the terminal voltage.