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Universal nonlinear modeling module applied to switching power supply and modeling method thereof

A modeling module and switching power supply technology, applied in the direction of electrical components, adjusting electrical variables, CAD circuit design, etc., can solve the problems of increasing the difficulty of modeling and analysis, complex working conditions of switching converters, etc., and achieve the goal of improving efficiency and simplifying difficulty Effect

Active Publication Date: 2020-01-21
NANJING UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

However, the addition of the soft-switching clamp circuit will bring more complex working conditions to the switching converter, further increasing the difficulty of modeling and analysis

Method used

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  • Universal nonlinear modeling module applied to switching power supply and modeling method thereof
  • Universal nonlinear modeling module applied to switching power supply and modeling method thereof
  • Universal nonlinear modeling module applied to switching power supply and modeling method thereof

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Embodiment

[0066] In order to verify the validity of the scheme of the present invention, the modeling steps of the scheme of the present invention are described in detail by taking the Flyback switching converter as the modeling object.

[0067] Figure 5 The main parameters of the Flyback switching converter shown are as follows, input voltage Vg=120V, load resistance R=6Ohm, output capacitor Co=100uF, output capacitor equivalent series resistance Resr=10m Ohm, switching frequency f=65kHz, excitation inductance for L 1 =600uH, the turns ratio of the primary and secondary sides of the transformer n=0.25, the equivalent leakage inductance of the primary side of the transformer L lk1 =50μH, clamping capacitor Cc=47nF, clamping resistor Rc=47k Ohm.

[0068] Considering the dynamic modeling method of switching converter with leakage inductance and clamping circuit, the control steps are as follows:

[0069] Step 1. Analyze the structure of the target switching converter to be modeled, an...

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Abstract

The invention discloses a universal nonlinear modeling module applied to a switching power supply and a modeling method thereof. A universal ITIS module corresponds to three different modeling models,namely, a universal ITIS module steady-state model, a universal ITIS module large-signal model and a universal ITIS module small-signal model. A universal ITIS module is used to carry out unified expression on a nonlinear part including part of inductive elements and a switching device in a switching converter to complete the modeling of the complex nonlinear part in the switching converter in advance. A steady-state model, a large-signal model or a small-signal model of a target converter can be established by only establishing an external linear network state equation of an equivalent ITISmodule of the target converter and substituting the equation into a universal ITIS module. According to the invention, the difficulty of user modeling is greatly simplified, and the efficiency of modeling analysis is improved.

Description

technical field [0001] The invention relates to a power converter modeling technology, in particular to a general nonlinear (ITIS) modeling module and a modeling method applied to a switching power supply. Background technique [0002] Establishing a suitable converter model is the key to the analysis and design of switching power supply. Traditional modeling methods include state space averaging (SSA), average switching model, switching signal flow graph nonlinear modeling (SFG) and so on. These methods are all based on the idea of ​​averaging modeling, the essence of which is to average and linearize the nonlinear switching elements in the switching converter circuit to obtain an equivalent circuit consistent with the original circuit topology, but with the circuit working state With the improvement of the order and order, the modeling will become complicated, which brings difficulties to researchers. In recent years, switching converters mostly use coupled inductors or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/335G06F30/30
CPCH02M3/33523
Inventor 姚佳郑凯升李科唯江平单梁张俊芳
Owner NANJING UNIV OF SCI & TECH
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