自动感应开关电路的设计

自动感应开关电路设计

摘要

随着现代通信技术的飞速发展，已经提出了更高的要求，通信电源的可靠性，重量，体积，效率等。相移和在直流/直流电压和电流全桥变换器结构简单的高功率应用中，输出功率大，效率高，易于实现软开关，具有一系列优点受到功率开关管，如小力，对它的研究具有非常重要的意义。首先，DC / DC升压转换器的电流触发电路，输入电路，反馈电路的控制芯片，详细的推挽式变压器，损耗问题进行了研究和分析的MOS场效应晶体管的焦点。其次，本文还简单介绍了在本实验所使用的设备的设备所必需的参数，建立了模型，用Protel Altium Designer 6.9仿真软件系统的稳定性进行了分析。最后的仿真结果，根据自己的实际电路，从而使调试一切正常，达到了预期的效果。

关键词：DC/DC电压变换器；推挽变压器；反馈电路控制芯片

Abstract

With the rapid development of modern communication technology, higher requirements have been put forward, communication power supply reliability, weight, volume, efficiency etc.. The phase shift and the application in high power DC / DC voltage and current structure of full bridge converter is simple, high output power, high efficiency, easy to realize soft switching, has a series of advantages by the power switch, such as small capacity, it is very important to research on it. First of all, the current DC / DC converter trigger circuit, input circuit, feedback control circuit, push-pull transformer in detail, loss of focus of MOS field effect transistor research and analysis. Secondl. Secondly, the paper simply introduces the parameters required in the use of the experimental equipment, established the model for stability, Protel Altium Designer 6.9 simulation software system is analyzed in the paper. Finally the simulation results. Finally the simulation results, according to the actual circuit of their own, so that all the normal debugging, achieves the expected effect.

Keywords: DC/DC boost converter; push-pull transformer; feedback circuit control chip

目录

摘要....................................................................................................................................... I 1 绪论 . (1)

1.1开关电源的发展历程 (1)

1.2开关电源的分类 (1)

1.2.1按驱动方式分类 (1)

1.2.2按能量转换过程的类型分类 (2)

1.2.3按输入与输出是否隔离分类 (2)

1.2.4按功率开关管关断和开通工作条件分类 (2)

1.3开关电源的特点 (3)

2 开关电源主电路的设计 (4)

2.1逆变器的工作原理 (4)

2.2换器的滤波电容和电感的选取.................................................... 错误!未定义书签。

2.2.1滤波电容的选取.................................................................. 错误!未定义书签。

2.2.2滤波电感的选取.................................................................. 错误!未定义书签。

2.2.3高频逆变电源的设计核心就是变压器的设计.................. 错误!未定义书签。

2.3变压器绕制步骤 (5)

2.4硬件抗干扰措施 (6)

2.5仿真结果 (6)

3 开关电源控制芯片的设计 (8)

3.1 TL494芯片简介 (8)

3.2外围电路的介绍 (13)

3.3仿真结果 (14)

4 开关电源反溃电路的设计 (15)

4.1电源反馈部分的工作原理 (15)

4.2仿真结果 (17)

结论 ............................................................................................ 错误!未定义书签。致谢......................................................................................................... 错误!未定义书签。参考文献. (21)