毕业设计-直流稳压电源的设计

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1、 摘 要 本设计系统采用PWM发生器及驱动器为核心，设计附有储存、滤波、分时导通的可调直流稳压电源系统，具有结构简单、成本低、精度高等优点。很大程度上满足了稳压电源的应用需求，稳压电源以体积小、可调控范围广、效率高、应用范围广的目的而设计的。设计一个双管正激式它激型开关稳压电源电路，使其符合测量要求，主要过程是两个开关管分别轮流导通，传送能量使变压器变压，电流通过二极管和电感L给电容C充电同时对负载Rl供电。通过导通周期的互补，电容的充放电发生变化，这样就会使输出电源电压的范围发生变化。通过芯片SG3525进行反馈控制电路的占空比，输出采用滤波电路来实现设计要求。 关键词：滤波电路，稳压电源电

2、路，SG3525，双管正激式开关电源。 AbstractThis design system using PWM generator and drive as the core, the design attached storage, filter, time-sharing conduction of adjustable dc regulated power supply system, has the advantages of simple structure, low cost and high accuracy. To a large extent satisfy the app

3、lication demand of regulated power supply, regulated power supply with small size, wide regulating range, high efficiency, wide application scope and the purpose of design.Design a two pipe is shock type it shock type switch stabilized voltage supply circuit, make it conform to the requirements of t

4、he measurement, process are two main switch tube respectively conduction in turn, transmits energy transformer transformer, current through the diode and the inductance L to charging capacitance C to Rl load power supply at the same time. By conducting periodic complementary, charge and discharge ca

5、pacity changes, this will make the output voltage range change. Through the chip SG3525 feedback control circuit of the duty cycle, output filter circuit is used to achieve the design requirements. key words: filter circuit, voltage stabilizing circuit,SG3525, the two pipe is shock type switching po

6、wer supply.目 录第1章 绪 论11.1 选题目的及意义11.2 国内外研究概况21.3 本文主要设计内容3第2章 方案论证与设计52.1 DC/DC主电路拓扑52.2 控制方法及实现方案52.3 提高效率的方法和实现方案7第3章 电路设计和参数计算93.1 主回路器件的选择及参数计算93.2 控制电路设计与参数计算123.3 辅助电源电路设计与参数计算153.3.1 参数计算153.3.2 吸收回路电路的设计173.3.3 MOSFET的选择183.3.4 续流二极管的选择19第4章 测试分析194.1 测试方法204.2 测试仪器204.3 测试数据204.4 测试结果分析20第

7、5章 芯片简介225.1 主控芯片G3525简介225.2 辅助电路主控芯片UC3843简介255.3 运算放大器lm358芯片简介27结 论31致 谢32参考文献33附录A 主电路图35附录B 辅助电路图27附录C 主电路选材清单28附录D 辅助电路选材清单39附录E 实物图40ContentsChapter Introduction11.1 Purpose and significanc11.2 General research situation at home and abroad21.3 Mainly studies design conten3ChapterII Demonstra

8、tion and design52.1 DC/DC main circuit topology52.2 Control methods and implementation schem52.3 Efficiency methods and implementation scheme7ChapterIII Circuit design and parameter calculation93.1 The main circuit components selection and parameter calculation93.2 Control circuit design and paramet

9、er calculation123.3 The auxiliary power circuit design and parameter calculation153.3.1 Parameters are calculated153.3.2 Absorption loop circuit design173.3.3 Choose MOSFET183.3.4 Choose stream tube very nine19ChapterIV Test analysis194.1 Test method204.2 Test instruments204.3 Test data204.4 Test re

10、sults analysis20ChapterV Chips profile225.1 Master control chip G3525 profile225.2 Introduction auxiliary circuit control UC3843 chip255.3 Operational amplifier lm358 chips profile27Conclusion31Acknowledgements32References33Appendix A main circuit diagram35Appendix B auxiliary circuit diagram27Appen

11、dix C main circuit material listing28Appendix D auxiliary circuit selection in listing39Appendix E physical figure40III第1章 绪 论1.1 选题目的及意义随着电子技术的高速发展，电子系统的应用领域越来越广泛，电子设备的种类也越来越多，电子设备与人们的工作、生活的关系益密切。任何电子设备都离不开可靠的电源，它们对电源的要求也越来越高。特别是随着小型电子设备的应用越来越广泛，也要求能够提供稳定的电源，以满足小型电子设备的用电需要1-3。本文基于这个思想，设计和制作了符合指标要求的