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Multilevel Inverter Topology Circuit

A technology of three-level inverter and topological circuit, which is applied in the direction of electrical components, AC power input conversion to DC power output, output power conversion device, etc. It can solve the problems of electromagnetic interference and endangering the personal safety of equipment, and achieve the elimination of High-frequency leakage current, effect of suppressing PID effect

Active Publication Date: 2020-01-24
汪洪亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

High-frequency leakage currents in common-mode loops cause electromagnetic interference, endangering both equipment and personnel
Therefore, high-frequency leakage current has become an important problem that must be solved in the transformerless inverter system

Method used

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Embodiment Construction

[0061] The invention provides a multi-level inverter topology circuit, including a single-phase three-level inverter topology circuit and a five-level inverter topology circuit and a three-phase three-level inverter topology circuit and a five-level inverter topology circuit. In order to enable those skilled in the art to better understand the technical solutions in the present invention and how to implement them, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0062] As shown in the accompanying drawings,...

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Abstract

A multi-level inverter topology circuit. In the three-level and five-level inverter topology circuits, it can still work normally when the AC output end of the inverter part is connected to the negative pole of the DC power supply through the AC grid. . In this way, the DC power supply can always keep the ground potential greater than or equal to zero, so the PID effect can be effectively suppressed; and the high-frequency leakage current of the inverter topology can be completely eliminated.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application US 62 / 174,620, filed June 12, 2015, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0003] The application relates to multi-level inverter topological circuits, in particular to single-phase, three-phase three-level and five-level inverter topological circuits. Background technique [0004] With the intensification of global energy and environmental problems, renewable energy is developing rapidly. Photovoltaic power generation has a good development prospect because of its abundant resources and wide distribution. For photovoltaic power generation systems, how to reduce costs and improve efficiency has become an important issue for photovoltaic power generation. [0005] In photovoltaic power generation systems, photovoltaic power generation arrays are used to convert solar energy into electrical ener...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/483
CPCH02M7/483
Inventor 汪洪亮
Owner 汪洪亮