Multilevel converter and topology method thereof

摘要

A multilevel converter includes at least one phase. Each phase of the multilevel converter includes a direct current (DC) link, a first circuit, a second circuit, and a phase capacitor. The DC link includes a first capacitor, a second capacitor, and a third capacitor situated between the first and second capacitors. The first circuit is electrically coupled to two terminals of the first capacitor. The second circuit is electrically coupled to two terminals of the second capacitor. The phase capacitor is electrically coupled between the first circuit and the second circuit.

主权项

1. A multilevel converter comprising:
at least one phase, each phase comprising a direct current (DC) link comprising a first capacitor, a second capacitor, and a supplementary capacitor situated between the first and second capacitors; a first circuit electrically coupled to two terminals of the first capacitor; a second circuit electrically coupled to two terminals of the second capacitor, wherein the supplementary capacitor segments the first circuit and the second circuit respectively, and provides a supplementary voltage selection between the first capacitor and the second capacitor; and a phase capacitor electrically coupled between the first circuit and the second circuit.