Single-primary winding voltage source type multi-input full-bridge converter

Abstract

The invention discloses a single-primary winding voltage source type multi-input full-bridge converter, belonging to the field of power electronic converters. The converter consists of N input channel circuits, a full-bridge converter circuit (20) and an output rectifying circuit (30), wherein N is a natural number greater than 1; each input channel circuit consists of an input source, a switch tube and a fly-wheel diode; the N input channel circuits are connected in series by the fly-wheel diode; the full-bridge converter circuit (20) consists of four full-bridge switch tubes and a transformer; and the output rectifying circuit (30) consists of a full-bridge rectifying circuit, a filtering inductor and a filtering capacitor. The primary edge of the transformer of the converter is only provided with a winding, the number of the switch tubes can be 4+N, and the volume of the converter is small and the structure is simple; when the switch tubes in the input channels are switched on simultaneously, the input source is connected in series to the load for supplying electricity so as to realize that the multiple input sources supply electricity simultaneously or at the different time.

Description

technical field [0001] The invention relates to a single-primary winding voltage 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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