Dc/dc conversion circuit, inverter, and method for neutral point voltage balancing for inverter

An inverter, wherein the inverter comprises a multi-level inverter circuit and a DC/DC conversion circuit, a direct-current side of the multi-level inverter circuit is electrically connected to a second side of a primary circuit of the DC/DC conversion circuit, and an alternating current side of the multi-level inverter circuit provides an alternating current output;

• and
• the DC/DC conversion circuit is configured to provide direct-current conversion between a first direct-current voltage and a second direct-current voltage, and the DC/DC conversion circuit comprises:
• a transformer, wherein the transformer comprises the primary winding and a secondary winding, and the primary winding comprises a center tap, and a first primary winding and a second primary winding respectively connected to the center tap;
• a primary circuit, wherein a first side of the primary circuit is connected to the primary winding, a second side of the primary circuit comprises a first end, a second end, and a third end arranged between the first end and the second end, and the first direct-current voltage is provided between the first end and the second end of the primary circuit;
• and
• winding, and a second side of the secondary circuit provides the second direct-current voltage, wherein
• the third end of the primary circuit is connected to the center tap, to provide a current loop to balance a voltage between the first end and the third end of the primary circuit and a voltage between the second end and the third end of the primary circuit.