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Subsection subsection sliding mode control and flying capacitor voltage balance method of three-level DC-DC buck converter

A flying capacitor and voltage balance technology, which is applied in the field of segmented sliding mode control and flying capacitor voltage balance, can solve the problems of difficult control and large number of switches

Inactive Publication Date: 2017-09-19
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the three-level Buck DC converter is a typical nonlinear system with a large number of switches, switching between multiple modes, and the output voltage is coupled with the flying capacitor voltage, making it difficult to control
Although the traditional buck converter is controlled by the sliding mode control method in the prior art, for the three-level DC-DC buck converter, the segmented sliding mode control method can be implemented to adjust the output voltage while balancing the flying capacitor voltage The technology is still blank, which urgently requires those skilled in the art to solve the corresponding technical problems

Method used

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  • Subsection subsection sliding mode control and flying capacitor voltage balance method of three-level DC-DC buck converter
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  • Subsection subsection sliding mode control and flying capacitor voltage balance method of three-level DC-DC buck converter

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Embodiment Construction

[0068] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0069] In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or elem...

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Abstract

The present invention provides a subsection segment sliding mode control and flying capacitor voltage balance method of a three-level DC-DC buck converter. The method comprises: the step 1, building and modal analysis of the subsection sliding mode control system of the three-level DC-DC buck converter; the step 2, performing balance of the flying capacitor voltage while controlling the output voltage based on the subsection sliding mode control theory; and the step 3, performing efficient, rapid and stable control based on the subsection sliding mode control method.

Description

technical field [0001] The invention relates to the field of automatic control, in particular to a segmental sliding mode control of a three-level DC-DC buck converter and a method for balancing the voltage of a flying capacitor. Background technique [0002] There are more and more applications for high-voltage input and medium-to-high-power output, but the withstand voltage and current-carrying capacity of power switching devices have not made major breakthroughs. Traditional two-level Buck DC converters are difficult to meet the requirements of high-voltage and high-power electric energy conversion. , but the multilevel Buck DC converter can solve this problem. Compared with the traditional two-level Buck DC converter, the three-level Buck DC converter has many advantages: the voltage stress on the switching tube is halved, the effective switching frequency is twice the switching frequency, the filter inductor and capacitor size are smaller, and the energy Higher density...

Claims

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Application Information

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IPC IPC(8): H02M3/158
CPCH02M3/1584
Inventor 凌睿胡睿黄雪莉张腾
Owner CHONGQING UNIV
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