A double-terminal common-ground inverter

Abstract

The invention discloses a dual-terminal common-ground inverter. The circuit topology of the inverter includes a DC input side source DC, a first switching device S 1 , the second switching device S 2 , the third switching device S 3 , the first inductance L 1 , the second inductance L 2 , the third inductance L 3 , the first capacitance C 1 , the second capacitance C 2 , the third capacitor C 3 and the fourth capacitor C 4 , the present invention can be applied to buck-boost occasions without a transformer or a front-stage DC converter, and can realize that the output voltage amplitude is larger or smaller than the input-side voltage amplitude, and the output voltage range is large. The double-terminal common-ground inverter has few components, simple structure, small volume, low cost, and high gain. At the same time, it adopts a double-terminal common-ground structure to eliminate leakage current; Small input side current ripple.

Description

Technical field [0001] The present invention relates to an inverter in the field of power electronic converter technology, in particular a double-ended common ground inverter. Background [0002] As a kind of power electronic equipment, the basic role of the inverter is to convert the DC input side power supply into an AC power source to meet the load requirements of the load or power grid. Among them, single-phase inverters are mainly used in small and medium-power occasions, with simple structure and low cost, and are widely used in photovoltaic power generation, wind power generation, fuel cells and other new energy power generation occasions. The traditional inverter is mainly divided into voltage source inverter and current source inverter, and the voltage source inverter is used as a step-down inverter, and its output voltage amplitude is lower than the input side voltage amplitude; Current source inverter as a boost inverter, its output voltage amplitude is higher than the...

AI Technical Summary

Problems solved by technology

However, the inverter proposed in this scheme is a step-down inverter, which limits its application in step-up applications

The article A family of three-switch three-state single-phase Z-source inverters published by Huang Long et al. in IEEE Transactions Power Electronics in 2013 proposed two types of three-switch three-state Z-source inverters based on Boost type three Switching three-state Z-source inverter and Buck-Boost-based three-switch three-state Z-source inverter, Professor Wang Baocheng and others published an article in the Electronics journal in 2018 A new CUK-based Z-source inverter proposed a CUK-based Z-source inverter based on the CUK type Three-switch three-state Z-source inverter, the article A novel three-switch Z-source SEPIC inverter published in the Electronics journal in 2019 proposes a SEPIC-based three-switch three-state Z-source inverter, this type of three-switch three-state Z The source inverter is a buck-boost inverter, and its output voltage amplitude of the inverter can be greater than or less than the input-side DC voltage amplitude, and a double-terminal common-ground structure is used to suppress leakage current; but the inverter has a boost capability Insufficient defects

Images