Dual Boost inversion preceding stage high frequency link matrix type three-phase four-arm pair inversion topology

Abstract

The invention relates to a dual Boost inversion preceding stage high frequency link matrix type three-phase four-arm pair inversion topology, belonging to field of isolated high frequency power inversion. The invention comprises a dual Boost high frequency inverting circuit (1), a high frequency link transformer (2), a matrix type three-phase four-arm pair inverter (3) and a system output link (4). The dual Boost circuit realizes amplitude modulation boosting high frequency inversion, the high frequency transformer is used for electrical isolation and energy transfer, the matrix type three-phase four-arm pair inverter performs symmetry under unbalanced load and balanced AC output on the transformer, and the system output link is connected with an electricity using device. The invention has the predominant advantage of simultaneously having the functions of high frequency isolation and inversion, boosting inversion, and three-phase four-arm pair power to solve the load imbalance, as well as other advantages that the number of boosting inverting circuit elements is half of that of a bridge type inverter with the same volume, the number of turns of transformer windings and the influence of parasitic parameters can be reduced during pressure boosting and regulating, and all the backward stage arms have a unitary structure, and modulization and integration are easy to realize.

Description

technical field [0001] The invention relates to a dual-Boost inverter front-stage high-frequency chain matrix type three-phase four-arm pair conversion topology, belonging to the field of isolated high-frequency power conversion. Background technique [0002] An inverter circuit is a topological device that converts DC power into AC power. [0003] Traditional inverters are often divided into square wave output type and sine wave output type. When it comes to isolation and buck-boosting, it is necessary to add a power frequency transformer to the inverter output (or between the public grid), which has the advantages of large size, heavy weight, Disadvantages such as power frequency noise and poor dynamic response. [0004] The high-frequency link inverter uses a high-frequency transformer instead of a power frequency transformer to overcome the shortcomings of traditional transformer isolation applications. The power characteristic of the high-frequency link inverter is a ...

AI Technical Summary

Problems solved by technology

The designed main circuit topology applies the three-phase four-arm pair technology to the matrix inverter topology, and uses it as the rear stage of the high-frequency link inverter, which can not only solve the problem of unbalanced three-phase load, but also Advantages of matrix converters and high-frequency chain conversions

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