Inverter with intermediate circuit capacitor cascade and DC-side common-mode and differential-mode filters

摘要

The invention relates to an inverter having an intermediate circuit capacitor, the connections of which are connected to supply lines for current supply and to a switching device which includes a plurality of half-bridges, wherein the intermediate circuit capacitor has a prespecified intermediate circuit capacitance, the magnitude of which is such that a ripple voltage which is formed in the supply lines by switching processes in the switching device is reduced to a prespecified maximum ripple voltage under prespecified operating conditions. For the purpose of reducing differential-mode interference, the invention proposes that a plurality of intermediate circuit capacitors which are connected in parallel are provided, wherein a sum of the capacitances of the plurality of intermediate circuit capacitors corresponds to the intermediate circuit capacitance.