开关稳压电源设计

文档编号:CK091   文档字数:11048,页数:40

摘  要
 随着电力电子技术的高速发展，电力电子设备与人们的工作、生活的关系日益密切，而电子设备都离不开可靠的电源，进入80年代计算机电源全面实现了开关电源化，率先完成计算机的电源换代，进入90年代开关电源相继进入各种电子、电器设备领域，程控交换机、通讯、电子检测设备电源、控制设备电源等都已广泛地使用了开关电源，更促进了开关电源技术的迅速发展。开关电源是利用现代电力电子技术，控制开关晶体管开通和关断的时间比率，维持稳定输出电压的一种电源，开关电源一般由脉冲宽度调制（PWM）控制IC和MOSFET构成。开关电源和线性电源相比，二者的成本都随着输出功率的增加而增长，但二者增长速率各异。线性电源成本在某一输出功率点上，反而高于开关电源，这一成本反转点。随着电力电子技术的发展和创新，使得开关电源技术在不断地创新，这一成本反转点日益向低输出电力端移动，这为开关电源提供了广泛的发展空间，具有普遍显示意义。
 
关键词：开关电源、脉冲宽度调制、线性电源、MOSFET
 
  
Abstract
With the rapid development of power electronics, power electronics equipment and people work and live closer ties between the electronic equipment can not do without a reliable power supply, computer power in 80 years of the switching power supply with the first to complete the computer's power updating, switching power supply into the 90's have access to a variety of electronic, electrical devices, program-controlled switches, communications, electronic test equipment power supply, power supply and other control devices are widely used in switching power supply, switching power supply also contributed to the rapid development of technology .
 Switching power is the use of modern electronic technology, control switch transistor turn-on and turn-off time ratio of a stable output voltage of one kind of power supply, switching power supply generally pulse width modulation (PWM) control IC and MOSFET form. Switching and linear power supply compared to the cost of both the output power increased with the increase of growth, but growth rate varied between the two.
 Linear power supply costs in a given output, rather than switching power supply, the cost of reversal.With the development of power electronics technology and innovation, making switching power supply technology in constant innovation, increasing the cost of reversal point move to the low output power side, which for the switching power supply provides a broad development space, a general show meaningful.
 
Keywords：Switching power supply, pulse width modulation，linear power supply，MOSFET
 
目录
摘要
第一章 绪论 1
1.1 开关稳压电源的基本概念 1
1.2 开关稳压电源的发展 1
    第二章 总体方案设计 3
2.1 设计任务 3
 2.2 设计要求 3
2.3 题目分析 4
2.4 方案讨论 4
  2.5 提高效率的方法及实现方案 12
第三章 电路设计与参数计算 13
3.1 自制辅助电源设计与参数计算 13
3.2 DC-DC变换器的设计与参数计数 15
3.3 人机交互及保护电路设计 18
3.4 占空比调整模块 20
3.5 基准值设置模块 21
第四章 测试结果与分析 22
4.1测试仪器 22
4.2测试方法 22
4.3测试数据 22
 第五章 误差分析 24
第六章 总结 25
致谢 26
主要参考文献 27
附录 28

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