Method and switch assembly for exciting the intermediate voltage circuit of an inverter

The method involves intermittent loading of intermediate voltage circuit (C-IN) of an inverter from the source. The time range for a possible loading determines the switches (S1 to S6) of the inverter power stage depending on the switching conditions. A direct current voltage source has a voltage step-up switching regulator. An independent claim is also included for a circuit arrangement for controlling the electrical potential process between the electrical power or connection of a direct voltage flow or co-current flow and earth.