Current-source-type multi-input full-bridge converter with single primary winding

Abstract

The invention discloses a current-source-type multi-input full-bridge converter with a single primary winding, belonging to the field of power electronic converters. The converter comprises N input channel circuits, a full-bridge converter circuit (20) and an output rectifier circuit (30), wherein N is a natural number larger than 1, each input channel circuit comprises a DC power source, an inductors, a switching tube and a diode, the cathodes of all the diodes in the N input channel circuits are connected, the cathodes of all the DC power sources are connected, the full-bridge converter circuit (20) comprises four full-bridge switching tubes and one transformer, and the output rectifier circuit (30) comprises a full-bridge rectifier circuit and a filtration capacitor. The transformer of the converter provided by the invention is provided with only one winding and 4+N switching tubes so that small converter size and simple structure are achieved. When the switching tubes in the input channels are simultaneously switched off, the DC power sources are connected in parallel to supply power to the loads so that a plurality of input sources supply power to the loads simultaneously or in shared time.

Description

technical field [0001] The invention relates to a single primary winding current source type multi-input full-bridge converter in a power converter, belonging to the field of power electronic converters. Background technique [0002] With the continuous shortage of fossil energy and the continuous aggravation of environmental pollution, the development and utilization of new energy and renewable energy have received more and more attention. Distributed power generation systems have become a research hotspot, and direct-to-direct converters are an important component of them. part. However, new energy and renewable energy, such as: solar energy, wind energy, etc., vary greatly with climate and regional differences, and the power supply is unstable and discontinuous. In addition, the output voltage of fuel cells changes with changes in load, so in order to ensure Continuous and reliable power supply to loads requires multiple new energy sources to complement each other to for...

AI Technical Summary

Problems solved by technology

The existing multi-input full-bridge converter can use magnetic flux coupling to realize multi-input, but the number of windings on the primary side of the converter is the same as the number of input sources, the number of switching tubes is large, the structure is complex and costly, and the control method is relatively simple

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