Improved Cockcroft-Walton high step-up ratio quasi-Z-source inverter

The utility model belongs to the technical field of DC-AC conversion equipment, and relates to an improved Cockcroft-Walton high step-up ratio quasi-Z-source inverter, the main body structure comprises a DC power supply, a coupling inductor MCW unit, a quasi-Z-source frame, a switch module and a load module, the coupling inductor MCW unit is adopted to replace an energy storage inductor in an original quasi-Z-source circuit, and the quasi-Z-source frame is connected with the switch module. By means of two-degree-of-freedom adjustment of the straight-through duty ratio of the switching tube and the turn ratio of the coupling inductor, the situation of the lower limit duty ratio of high voltage gain is avoided, wide-range voltage output under the small duty ratio can be achieved, the overall safety of the inverter is guaranteed, and the inverter is scientific and reasonable in overall structural design, reliable in electrical principle, safe to use and suitable for popularization and application. The method is