Abstract: The invention relates to a method for operating a fuel cell arrangement which has a fuel cell for providing electrical energy in a circuit, at least one fuel cell auxiliary unit, the circuit electrically connected to the fuel cell via a DC-DC converter, and a battery. In this case, it is provided that, in order to place the fuel cell into operation, the battery be electrically connected to the circuit and the fuel cell auxiliary unit be operated with electrical energy drawn from the battery, wherein the battery is electrically disconnected from the circuit, and the DC-DC converter is operated in non-clocked mode in at least one operating mode of the fuel cell arrangement after placement into operation. The invention further relates to a fuel cell arrangement.

Abstract: A rectifier device for a motor vehicle. Including a switching unit, which is connected to an intermediate circuit of the rectifier device and which can be operated with a predetermined switching frequency and provided with a plurality of filter elements connected in an intermediate circuit. Each is equipped with an inter intermediate circuit capacitance. A minimum of the magnitude frequency response of a respective filter element is within a different frequency interval, which has a harmonic of the switching frequency as a middle frequency and an interval length corresponding to the switching frequency as a respective minimum of the magnitude frequency response.