Achieving zvs in a two quadrant converter using a simplified auxiliary circuit

A zero voltage switch half bridge converter comprising:

• a first diode and a second diode in series, and parallel with a voltage source, wherein the first diode has an anode connected to the negative side of the voltage source, a cathode of the first diode is connected to an anode of the second diode, and a first terminal of an inductor, and a cathode of the second diode is connected to a positive side of the voltage source;
• a first semiconductor auxiliary switch having a first controllable connection, wherein the first controllable connection is connected in series between the voltage source positive side and an anode of a third diode;
• a cathode of the third diode connected to an anode of a fourth diode and the inductor first terminal;
• a cathode of the fourth diode connected to a second semiconductor auxiliary switch having a second controllable connection, wherein the second controllable connection is in series between the fourth diode cathode and the voltage supply negative side;
• a first semiconductor main switch having a first controllable main connection and a second semiconductor main switch having a second controllable main connection, wherein the first controllable main connection and the second main controllable connection are connected in series at a junction, and together connected in parallel with the voltage supply;
• a capacitive voltage divider connected across the voltage source;
• a second terminal of the inductor connected to the junction and a midpoint of the capacitive voltage divider;
• and
• a control circuit configured to provide respective control signals to at least the first semiconductor auxiliary switch and the second semiconductor auxiliary switch.