Single-phase three-level inverter

Abstract

The invention discloses a single-phase three-level inverter which comprises an input capacitor C1, an input capacitor C2, a first switch Q1, a second switch Q2, a third switch Q3, a fourth switch Q4, s fifth switch Q5, a sixth switch Q6, a grid-connected filter inductor L1 and a grid-connected filter inductor L2. The anode of the input capacitor C1 is connected with the anode of the first switch Q1, the anode of the third switch Q3, the grid-connected filter inductor L1 and the grid-connected filter inductor L2 through wires to form a positive level output loop. The anode of the input capacitor C2 is connected with the anode of the second switch Q2, the anode of the fourth switch Q4, the grid-connected filter inductor L1 and the grid-connected filter inductor L2 through wires to form a negative level output loop. When the single-phase three-level inverter is used, the different combinations of the first switch Q1, the second switch Q2, the third switch Q3, the fourth switch Q4, the fifth switch Q5, the sixth switch Q6, the input capacitor C1, the input capacitor C2, the grid-connected filter inductor L1 and the grid-connected filter inductor L2 are controlled so that the input direct current electricity energy can be converted into alternative current electricity energy. By means of the single-phase three-level inverter, the power consumption distribution can be flexibly adjusted, and the single-phase three-level inverter is further provided with the booster function.

Description

technical field [0001] The invention relates to a single-phase three-level inverter, which belongs to the technical field of power electronics. Background technique [0002] Multilevel converters have become a de facto industrial standard in high-power applications such as high-voltage motor drives and smart grids (FACTS HVDC), and gradually penetrate into small and medium power applications. Put forward higher expectations to simplify the complexity of multilevel converter control, improve the convenience of structural design, and reduce the overall cost of the entire device; therefore, although new multilevel converters emerge in endlessly, however, for all The research and exploration of multilevel converters with ideal performance have never stopped. Contents of the invention [0003] In view of the above technical problems, the object of the present invention is to propose a single-phase three-level inverter that can flexibly adjust the distribution of power loss and...

AI Technical Summary

Problems solved by technology

[0002]Multilevel converters have become a de facto industry standard in high-voltage motor drive and smart grid (FACTS HVDC) and other high-power applications, and are gradually moving towards small and medium power Occasion penetration, the industry continues to put forward higher expectations for the inherent characteristics of the multilevel converter itself, in order to simplify the complexity of multilevel converter control, improve the convenience of structural design, and reduce the overall cost of the entire device; therefore, Although new multilevel converters emerge in endlessly, the research and exploration of multilevel converters with ideal performance in all aspects have never stopped.

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