Dual-input direct-current (DC) converter

Abstract

The invention discloses a dual-input direct-current (DC) converter, belonging to the field of electronic convertors. Three converters respectively comprise two input sources, a switching tube, a transformer, a secondary circuit and the like, wherein the two input sources are subjected to common ground and are arranged at a primary side of the transformer; and the two input sources are electrically isolated from the load by the transformer. The two input sources adopted by the converter can supply power for the load independently or simultaneously; the converter has strong load matching capacity; the two input sources share the primary side of the transformer; and the number of switching elements is less, and the conversion efficiency is high. The dual-input DC converter is particularly suitable for the fields of new energy resource generating systems and the like.

Description

technical field [0001] The invention relates to three kinds of double-input DC converters in power converters, and belongs to the field of power electronic converters. Background technique [0002] With the increasingly severe energy crisis and environmental pollution, new energy power generation technologies such as solar energy, wind energy, and fuel cells have become the focus of attention and research around the world. [0003] Research and utilization of new energy power generation technology is an effective measure to solve the energy crisis and environmental pollution, but most new energy sources are limited by climate conditions, and have disadvantages such as low energy density, unstable power supply, and discontinuity. In order to overcome the above shortcomings, new energy joint power generation can be adopted, and the complementarity between various new energy sources or between new energy sources and other energy sources can be used to obtain relatively stable e...

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Problems solved by technology

[0004] Such as the literature "Yuan-Chuan Liu, Yao-Ming Chen. A systematic approach to synthesizing multi-input DC-DC converters, IEEE Transactions on Power Electronics, 2009, 24(1): 116-127" and the literature "Yan Li, Xinbo Ruan, Dongsheng Yang, Fuxin Liu and Chi K.Tse.Synthesis of multiple-input DC / DC converters, IEEE Transactions on Power Electronics, 2010, 25(9): 2372-2385" respectively proposed topology generation of multiple-input converters method, and constructed a variety of multi-input DC converter topologies. The construction methods of the multi-input DC converters in the above two documents are similar. In the constructed multi-input DC converters, especially the multi-input source and load isolation DC converter, the number of devices used is large, the utilization rate of devices is low, and the circuit structure and control are relatively complicated

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