Abstract: The invention relates to a voltage converter for converting a primary/secondary voltage into a secondary/primary voltage, comprising at least one controlled switch, wherein a control circuit controls, according to its supplied set points, the at least one controlled switch with a variable pulse duty factor and/or variable control times and/or variable frequency. The invention further comprises a digital signal processor for the running calculation of the set values for the control circuit, and the voltage converter comprises a (bus) interface via which operating parameters can, from an external control center, be transmitted to the digital signal processor and preset.

Abstract: Voltage converter (SCW) for converting a primary/secondary voltage (Up/Us) into a secondary/primary voltage (Us/Up), comprising at least one controlled switch (Sp, Ss), wherein a control circuit (AST) controls, according to its supplied set points, the at least one controlled switch (Sp, Ss) with a variable pulse duty factor and/or variable control times and/or variable frequency, characterized in that a digital signal processor (DSP) for the running calculation of the set points is provided for the control circuit (AST) and the voltage converter (SCW) comprises a (bus) interface (BSS), via which operating parameters (ppm) can be transmitted to the digital signal processor (DSP) and can be preset from an external control center (ELS).

Abstract: A method for supplying alternating current to a network (NET), according to which a direct current is converted to an alternating current with a line frequency, with the aid of an inverter (WER) and the output of the inverter is connected to the network. The terminal voltage (u(t)) is measured and the output current (i(t)) of the inverter (WER) is regulated in such a way that it essentially corresponds to the quotient of the square sine current power P0·sin2(?t) and the terminal voltage (u(t)), thus i(t)=P0·sin2(?t)/u(t).