1、 毕 业 设 计 说 明 书毕 业 设 计 说 明 书 高稳定度直流电源设计高稳定度直流电源设计 专业专业 电气工程及其自动化 学生姓名学生姓名 班级班级 学号学号 指导教师指导教师 完成日期完成日期 高稳定度直流电源设计（2011） 高稳定度直流电源设计高稳定度直流电源设计 摘 要：叙述开关电源的发展与现状，简要介绍开关电源的分类、发展动向及其 意义；阐述了直流开关电源的结构和工作原理，对开关电源的主电路和控制回路进 行设计：在主电路的输入回路中整流电路采用单相桥式整流，其中还设计了低通滤 波电路、整流滤波电路和其他形式的滤波电路。此设计中功率转换电路采用半桥型 DC/DC 变换器，这是开关
2、电源的核心部分，对此部分进行了重点分析和设计；控制 电路采用电压型 PWM 控制，控制器采用开关电源集成控制器 SG3525A，并对其特 点、结构和工作原理作了简单介绍，对于系统的结构也进行了重点设计，并对其各 个部分进行了元器件的选择和参数计算。其他部分还设计了保护电路和辅助电源电 路。最后，用 MATLAB 仿真软件对主电路进行仿真测试，通过仿真测试结果对该 直流电源设计的合理性进行判断，视其稳定性是否符合设计要求。 关键词：DC/DC 变换器；PWM 控制；SG3525A；MATLAB 仿真 高稳定度直流电源设计（2011） Design of High Stability DC Pow
3、er Supply Abstract: Describing the development and current situation of switching power supply, switching power supply briefly introduced the classification, development trend and its significance;DC switching power supply described the structure and working principle of the switching power supply o
4、f the main circuit and control circuit design:In the main input loop circuit using single-phase rectifier bridge rectifier circuit, which also designed the low-pass filter circuit, the rectifier filter circuit, and other forms of filter circuit.This design, half-bridge type power conversion circuit
5、using DC / DC converters, switching power supply which is the core of the focus of this part of the analysis and design;PWM control circuit with voltage control, switching power supply controller with integrated controller SG3525A, and its characteristics, structure and working principle is briefly
6、introduced, the structure of the system carried on the key design and the various parts of the element of its Device selection and parameter calculations.Also designed to protect other parts of the circuit and the auxiliary power supply circuits.Finally, the main circuit simulation software MATLAB simulation test, the simulation results of the DC power to judge the rationality of the design, depending on whether it meets the design requirements of its stability. Key Words: DC/DC transform
