Patent ID: 8315076

Claim:
Circuit arrangement for producing an alternating voltage or an alternating current from a direct voltage source which is configured unipolar relative to a neutral conductor and with an inverter, the direct voltage source being connected to a converter which converts a unipolar voltage of the direct voltage source into a bipolar intermediate circuit voltage which is stored in a buffer circuit connected to the inverter, wherein the converter comprises a clocked switch and an energy converting unit which is configured as a dual coil having first and second windings, each having a winding start and winding end, and the windings being disposed closely coupled to each other and the converter being configured in such a manner that energy delivered via the clocked switch is stored intermediately and, therefrom, a voltage inverted relative to a potential of the neutral conductor is produced at the first winding and a voltage with an identical polarity as the unipolar voltage is produced at the second winding, and wherein winding starts of the windings of the dual coil are connected to each other via a coupling capacitor.