推挽式开关电源的研究与设计
2023-04-22 15:48:17
论文总字数:15255字
摘 要
本论文介绍了在日常生活中应用最为广泛的推挽式开关电源的设计。推挽式开关电源有很多的长处,例如它的输出损失特别少,输出的电压波形稳定,不需要再次滤波,最终出来的阻抗也很低,最关键的是,它在系统中的运行非常的稳定和可靠。最普遍的作用是用在某些用电系统中,来提高系统运行时候的稳定性。这次设计将会对开关电源变压器和推挽式开关电源的基本的开发原理以及工作模式进行介绍和研究。特别是除开关电源的设计步骤,还有如何在电路中控制它,以及他与电路中其他元件的配合。
这一次的设计是推挽式开关电源,基础输入值与普通家用电压值相同,并且采用功率MOSFET管作为开关。本次设计会先介绍一下推挽式开关电源的工作原理还有组成这个电源的各种内部电路,还会对整个开关电源的变换回路各种桥式电路进行详细的分析,这样就可以选择合适的元器件进行模型的搭建,例如高频变压器、功率MOSFET管等。完成整个设计电路原理图,之后会用ORCAD进行模拟仿真调试。
关键词:推挽式、SG3526、高频变压器
Abstract
This paper describes the daily life of the most widely used push-pull switching power supply design. Push-pull type switching power supply has a lot of strengths, such as its exceptionally low loss of output, the output voltage waveform is stable, does not require re-filtering, and finally out of the impedance is very low, the most critical is that it runs in the system is very stable and reliable. The most common effect is used in some power systems to improve system stability when running. The designs will be presented and the study of switching power supply transformer and basic development principles as well as push-pull mode switching power supply. In particular, in addition to switching power supply design steps, and how to control it in the circuit, as well as his cooperation with the other components of the circuit.
This time the design is a push-pull type switching power supply, basic input values and common household voltage values are the same, and the use of power MOSFET as a switch. This design will first introduce the principle of a push-pull type switching power supply as well as the composition of the various internal circuit power supply, but also on the whole variety of switching power conversion circuit detailed analysis of the bridge circuit, so that you can choose the right the components for building models, such as high-frequency transformers, power MOSFET tube. Complete the design of the circuit schematic, then it will be used ORCAD simulation debugging.
Keywords: push-pull switching power supply; SG526; high-frequency transformers
目录
摘 要 I
Abstract II
第一章 总序 1
1.1课题的研究意义及背景 1
1.2前进的方向 1
1.3开关电源的主要技术指标 2
1.4课题研究的主要内容与难点 3
第二章 开关电源的基本原理 4
2.1开关电源的基本原理 4
图2.1开关电源的结构框图 4
2.2开关电源拓扑结构 4
2.2.1非隔离式开关电源拓扑结构 4
2.2.2隔离式的开关 6
2.3推挽式开关变换电路基本原理 8
第三章 推挽式开关电源电路设计 10
3.1关于参数方面的要求 10
3.2系统总体设计方案 10
3.3开关电源整体电路原理图 10
3.4相关电气元器件的选型与设计 11
3.5高频变压器的选用设计 12
3.5.1高频变压器工作原理及作用 12
3.5.2高频变压器的磁芯及材料选择 13
3.5.3变压器绕组相关参数的计算 13
3.6输出侧的设计 14
3.7功率MOSFET驱动电路设计 14
3.7.1功率MOSFET的选择 15
3.7.2如何选择合适的功率管 15
3.8前端保护与滤波电路的设计 15
3.8.1前端保护电路 15
3.8.2滤波电路设计 16
3.9整流电路的设计 17
3.10启动电路与保护电路 17
3.10.1启动电路 17
3.10.2保护电路 18
3.11辅助电源设计 18
3.12本章小结 19
第四章 系统仿真与实验结果分析 20
4.1简介 20
4.2仿真波形图 20
4.2.1仿真电路图 20
4.2.2 仿真波形图 21
4.3本章小结 21
第五章 设计总结 22
5.1 研究总结 22
5.2 进步前景 22
致 谢 23
参考文献 24
附 录 25
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