| 摘要 |
The invention relates to a device (2) for limiting an overvoltage in the DC link (18) of a traction power converter. The inventive device (2) comprises two interruptible semiconductor switches (T7, T8) that are electrically connected in series, an inductor (48), a double-layer capacitor (50), and a resistor (54) which can be connected by means of a switch (S1). The inductor (48) and the double-layer capacitor (50) are electrically connected in series while said series connection is connected between an interconnection point (46) of the two interruptible semiconductor switches (T7, T8) and a negative conductor rail (20) of the DC link (18). Additionally, the connectable resistor (54) can be electrically connected parallel to the double-layer capacitor (50), resulting in a device which is structured in a particularly simple manner and by means of which overvoltages occurring in the DC link (18) of a traction power converter can be suppressed. |
