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Discrete modeling, stability analysis and parameter design method for switching converter

A switching converter, parameter design technology, applied in CAD circuit design, instrument, calculation and other directions, can solve the problems of low model accuracy, complex calculation, insufficient description of circuit nonlinear characteristics, etc., to improve reliability and manual calculation. less effect

Inactive Publication Date: 2016-12-07
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0010] Aiming at the shortcomings of existing modeling and analysis methods for switching converters, such as narrow application range, low model precision, complex calculation, and insufficient description of nonlinear characteristics of circuits, the present invention provides a time-domain analysis method for switching converters. New Approaches to Discrete Modeling, Stability Analysis, and Parametric Design

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  • Discrete modeling, stability analysis and parameter design method for switching converter
  • Discrete modeling, stability analysis and parameter design method for switching converter
  • Discrete modeling, stability analysis and parameter design method for switching converter

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Embodiment Construction

[0042] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0043] Take the single-phase full-bridge inverter as an example to illustrate.

[0044] The circuit structure of single-phase full-bridge inverter is as follows: figure 2 shown. The main circuit of the converter is first-order, and the output is AC current. The output current i=i(t) of the system is selected as the state variable model, and the stroboscopic mapping sampling schematic diagram is as follows image 3 shown.

[0045] The piecewise continuous state equation of the main circuit in the nth switching cycle is as follows:

[0046] d i ...

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Abstract

The invention provides a discrete modeling, stability analysis and parameter design method for a switching converter, and the method is illustrated by taking a single-phase full-bridge inverter and a B00ST converter as examples. The method provided by the invention comprises the steps of solving a state equation in a switching period of the converter by virtue of Matlab to obtain a stroboscopic mapping expression and a numerical solution in an analytical form; and then drawing a bifurcation diagram, a folding diagram, a phase diagram, a Lyapunov exponent spectrum and a Poincare section for performing stability analysis and parameter design on the converter. The modeling, analysis and design processes are finished directly in a time domain. A nonlinear characteristic of the switching converter is reserved in the modeling process, so that the accuracy is higher. The analysis process is finished mainly by utilizing an algorithm of Matlab, so that the manual calculation amount is small and the analysis is simple and convenient. An analysis result can be presented and verified in various forms, and a result of an analytical method can be verified by a result of a numerical method, so that the credibility is ensured.

Description

technical field [0001] The invention provides a method for time-domain discrete modeling, stability analysis and parameter design of a switching converter. Background technique [0002] Switching converters in power electronics technology, including AC-DC converters, DC-AC converters, DC-DC converters and AC-AC converters, have long been widely used in various industries and play an important role. [0003] The first and most critical step in the research and design of switching converters is to model and analyze the stability of the switching converter. Since the switching converter is a strongly nonlinear time-varying system, its modeling and analytical solution have always been a difficult problem. [0004] The existing modeling and analysis methods of switching converters are usually divided into two categories: digital simulation method and analytical modeling method. Digital simulation method is divided into direct digital simulation method and indirect digital simul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/367G06F30/39G06F30/398
Inventor 韩杨方旭李自鹏杨平熊静琪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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