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Index stability analysis method and system for DC/DC converter

A technology of index stability and analysis method, applied in the direction of instrumentation, design optimization/simulation, electrical digital data processing, etc., can solve problems such as discarding, application range limitation, analysis result gap, etc.

Active Publication Date: 2019-10-25
GUANGZHOU UNIVERSITY
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Problems solved by technology

[0004] Using the existing technology to analyze the stability of the DC / DC converter, there are the following problems: when the small signal analysis method is used to analyze the DC / DC converter, since the small signal analysis method is derived from the state space average model, the state variables are discarded There is often a large gap between the analysis results and the actual situation, and the application range is greatly limited; the discrete model analysis method is a linearization method, which is no longer applicable when the converter circuit parameters are greatly disturbed.

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  • Index stability analysis method and system for DC/DC converter
  • Index stability analysis method and system for DC/DC converter
  • Index stability analysis method and system for DC/DC converter

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Embodiment Construction

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0049] see Figure 1-Figure 14 :

[0050] First embodiment of the present invention.

[0051] An embodiment of the present invention provides an exponential stability analysis method of a DC / DC converter, which at least includes the following steps:

[0052] S1. Establishing an augmented cycle switching system model of the DC / DC converter according to the operating mode of the DC / DC converter;

[0053] S2. Establish the basis for judging the exponential stabilit...

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Abstract

The invention discloses an index stability analysis method of a DC / DC converter. The method at least comprises the following steps: establishing an augmented cycle switching system model of the DC / DCconverter according to an operation mode of the DC / DC converter; establishing a DC / DC converter system index stability judgment basis according to a discontinuous control theory; converting the augmented cycle switching system model about a working equalization point to obtain a system state space equation of the DC / DC converter system suitable for a discontinuous control index stability judgmentbasis; and analyzing the system state space equation according to a preset parasitic parameter and a judgment basis to obtain an index stability analysis result of the DC / DC converter system. According to the index stability analysis method and system for the DC / DC converter provided by the invention, the index stability analysis result of the DC / DC converter system can be accurately obtained without approximation.

Description

technical field [0001] The present invention relates to the technical field of DC / DC converters, in particular to an exponential stability analysis method and system for DC / DC converters. Background technique [0002] The DC / DC converter is a typical switching discontinuous system. Due to the introduction of "switching", the DC / DC converter system contains both continuously changing variables and discrete variables. The interaction of continuous variables and discrete variables forms a variety of coupling behaviors, and the dynamic behavior of the system becomes very complex, so the DC / DC converter is a typical hybrid system. Compared with the continuous system, using the discontinuous system to describe the DC / DC converter system is more accurate and can reflect the real situation of the system, but it is more complicated to study, and often requires abstract modern mathematical tools and complex control design methods. Some stability determination theories pose challenges...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 杨汝曾海威揭海胡维黄振明
Owner GUANGZHOU UNIVERSITY
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