Micro inverter

A micro inverter, comprising:

• a control unit, a transformer, a secondary-side bridge arm and N conversion branches, where Nis an integer greater than one;
• wherein
• an input terminal of each of the conversion branches serves as power-supply input terminal or a load terminal of the micro inverter;
• output terminals of the conversion branches are cascaded, and two terminals of the cascaded conversion branches are connected to an input terminal of the secondary-side bridge arm through the transformer;
• an output terminal of the secondary-side bridge arm serves as an output terminal of the micro inverter;
• and
• the secondary-side bridge arm and the conversion branches are controlled via the control unit;
• wherein a primary-side winding of the transformer is connected to the two terminals of the cascaded conversion branches through a first inductor;
• and/or a secondary-side winding of the transformer is connected to the input terminal of the secondary-side bridge arm through a second inductor;
• wherein the first inductor is independent of the primary-side winding, or the first inductor is a primary-side leakage inductor integrated in the transformer;
• and the second inductor is independent of the secondary-side winding, or the second inductor is a secondary-side leakage inductor integrated in the transformer.