Dual-active bridge converter based on multi-winding high-frequency transformer and control method

A high-frequency transformer, dual active bridge technology, applied in control/regulation systems, high-efficiency power electronic conversion, output power conversion devices, etc. Efficiency and reliability, effect of low rms current

Pending Publication Date: 2021-12-03
东莞市南博万电子科技有限公司 +1
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Problems solved by technology

[0003] The invention provides a dual active bridge converter based on a multi-winding high-frequency transformer and a control method, the purpose of which is to solve the problem that the traditional push-pull DAB converter cannot realize soft switching in the full load range in a wide voltage range

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  • Dual-active bridge converter based on multi-winding high-frequency transformer and control method
  • Dual-active bridge converter based on multi-winding high-frequency transformer and control method
  • Dual-active bridge converter based on multi-winding high-frequency transformer and control method

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Embodiment Construction

[0055] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0056] Aiming at the problem that the existing push-pull DAB converter cannot realize soft switching in the full load range in a wide voltage range, the invention provides a dual active bridge converter based on a multi-winding high-frequency transformer and a control method.

[0057] Such as Figure 1 to Figure 6 As shown, the embodiment of the present invention provides a dual active bridge converter based on a multi-winding high-frequency transformer, including: an input power supply 1; an input capacitor 2, the first end of the input capacitor 2 is connected to the input power supply 1, the second terminal of the input capacitor 2 is electrically connected to the negative terminal of the input power supply 1; the first switching tube 3, the drain ter...

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Abstract

The invention provides a dual-active bridge converter based on a multi-winding high-frequency transformer and a control method, and the method comprises the steps: 1, sampling an input voltage and an output voltage of the dual-active bridge converter, obtaining an input voltage sampling value of the dual-active bridge converter and an output voltage sampling value of the dual-active bridge converter, and calculating a voltage gain according to the input voltage sampling value of the dual-active bridge converter, the output voltage sampling value of the dual-active bridge converter and the turn ratio of the three-winding high-frequency transformer; and 2, setting an expected value Vref of the output voltage of the dual-active bridge converter, inputting a difference value between the expected value Vref of the output voltage of the dual-active bridge converter and the sampling value of the output voltage of the dual-active bridge converter into a digital PI regulator, and carrying out amplitude limiting through an amplitude limiter to obtain a phase shift ratio. According to the invention, on the premise of realizing soft switching in a full-load range, the lowest effective current value is obtained, the loss of the dual-active bridge converter is reduced, and the efficiency of the dual-active bridge converter is improved.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a dual active bridge converter based on a multi-winding high-frequency transformer and a control method. Background technique [0002] In industrial applications such as energy conversion, distributed power generation systems, and energy storage systems, high-frequency isolated bidirectional DC-DC converters play an important role in charging and discharging operations. Among these high-frequency isolated bidirectional DC-DC converters, the dual active bridge (DAB) converter has the advantages of easy zero-voltage turn-on, large power capacity, symmetrical structure and wide voltage range, etc., which have attracted the attention of scholars. The number of switching tubes of the full-bridge to full-bridge DAB converter is large, so that the switching loss is large in low-voltage and high-current situations, resulting in low efficiency and reduced reliability. To this e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335
CPCH02M3/33584H02M3/33515H02M3/33523Y02B70/10
Inventor 谭文曹华安覃列浓李丽婷许国
Owner 东莞市南博万电子科技有限公司
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