Bidirectional Flyback Converter Circuit

A bidirectional flyback converter circuit comprising:

• a transformer with inductively coupled primary and secondary windings, the primary winding being connected to a voltage input of the bidirectional flyback converter circuit and the secondary winding being connected to a voltage output of the bidirectional flyback converter circuit;
• a primary-side switching element arranged in series with the primary winding;
• a secondary-side switching element arranged in series with the secondary winding;
• a charge capacitor which is connected via a first terminal to a common potential of the primary and secondary sides, and which is connected by a second terminal via a first diode to a common potential of the primary-side switching element and primary winding and is further connected via a second diode to a common potential of the secondary-side switching element and secondary winding;
• and
• a buck converter arranged on one of an the input side or the output side of the bidirectional flyback converter circuit, said a buck converter regulating a voltage present at a charge capacitor to a predeterminable value.