A bidirectional active full-bridge converter based on three-winding transformer

Abstract

The invention discloses a bidirectional active full-bridge converter based on a three-winding transformer. The traditional bidirectional active full-bridge converter topology has obvious deficiencies on an occasion of a relatively large transformer primary side (transformer secondary side) voltage range. According to the bidirectional active full-bridge converter based on the three-winding transformer disclosed by the invention, a circuit works in multiple working modes by control of switching-on and switching-off of corresponding switching tubes, thereby adapting to different occasions; and at the same time, the loss of the circuit is reduced, the efficiency of the circuit is improved, and the transformer primary side (transformer secondary side) voltage range is increased. Under the condition that the switching frequency adjustment range is not changed, the transformer primary side (transformer secondary side) voltage range is effectively increased, the loss of the whole circuit is reduced, and thus the circuit has relatively high conversion efficiency on an occasion of a relatively high voltage transformation ratio.

Description

technical field [0001] The invention relates to a new type of power electronic interface conversion technology field, in particular to a bidirectional active full-bridge converter based on a three-winding transformer, which belongs to the technical field of power electronics and electric engineering. Background technique [0002] In the traditional bidirectional active full-bridge conversion circuit, such as figure 2 As shown, the conversion efficiency of the asymmetric half-bridge conversion circuit and the full-bridge conversion circuit is low and the voltage range of the transformer primary side (transformer secondary side) is narrow. The traditional bidirectional active full-bridge conversion circuit is to change the secondary voltage of the transformer by changing the switching frequency of the switch tube. As the secondary voltage of the transformer increases, the operating frequency of the switching device also increases, which brings about The switching loss on the ...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the problems of low conversion efficiency of bidirectional active full-bridge converter and narrow voltage range of transformer primary side (transformer secondary side), and provide a topology of isolated bidirectional active full-bridge converter of three-winding transformer. By controlling the on-off of the corresponding switch tube, the circuit can work in various working modes, adapt to different occasions, reduce circuit loss, improve circuit efficiency, and increase the voltage range of the primary side of the transformer (transformer secondary side)

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