MATLAB非隔离式开关电源仿真分析+源代码
毕业论文关键词：开关电源；降压型斩波电路；DC/DC ；SG3525
Abstract Switching power supply plays an important part of electronic products in the modern technological society and gets a lot of development. At the same time , switching power supply replaces the traditional linear power supply because of it is small and efficient. The simulink module of MATLAB which is used in the design can realize modeling and simulation for the power electronic circuit ,which has a advantage of simple and intuitive. This article describes the non-isolated switching based on the DC/DC step-down chopper circuit and the analysis of simulation for the switching power. The main content of the task is analyzing the main circuit, control circuit and drive circui. In addition to this, selecting parameter for these circuit components. In the main circuit, the insulated gate bipolar transistor (IGBT) is selected as a switch.Then,the chip of SG3525 generate a control signal to the drive circuit to control the switch’s condition. This method also realize Pulse-Width Modulation (PWM). Then using simulink module to model and simulate the step-down chopper circuit and get the output voltage waveform which is compared with theoretical output voltage waveform. Meanwhile, Comparing the output inductor current waveform with the theoretical waveform. Finally, Verifing the design of the switching power supply whether reasonable.
Keywords: Switch power supply; Step-down chopper circuit;DC/DC;SG3525
目录
第一章绪论.1
1.1引言.1
1.2国内外发展状况.2
1.3主要研究内容和方法..2
1.3.1主要研究内容.2
1.3.2研究方法和步骤..3
1.4本课题研究的意义和目的3
第二章MATLAB软件介绍.4
2.1MATLAB总体介绍4
2.2MATLAB在电气工程中的应用4
第三章电路设计原理分析6
3.1降压型DC/DC斩波电路工作原理的分析.6
3.2降压型DC/DC斩波电路的工作状态.7
3.3绝缘栅双极型晶体管（IGBT）的简介和优点..9
3.4降压型斩波电路的控制模式与控制方式..10
3.5非隔离式开关电源设计.10
3.5.1主电路设计..12
3.5.2控制电路设计.13
3.5.3驱动电路设计.17
3.5.4保护电路设计.18
3.6本章小结..19
第四章降压斩波电路的仿真分析.20
4.1电路元器件参数选择20
4.1.1电源模块组（Electricalsources）..20
4.1.2电力电子器件组（PowerElectronics）..20
4.1.3测量模块（Measurements）..22
4.1.4示波器（Scope）..22
4.1.5线路元件（Elements）.23
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