第1页共20页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共20页课程设计任务书学生姓名：______________专业班级：______电信09________指导教师：____刘运苟____工作单位：____信息工程学院____题目：家电延时保护器初始条件：具备模拟电子电路的理论知识；具备模拟电路基本电路的设计能力；具备模拟电路的基本调试手段；自选相关电子器件；可以使用实验室仪器调试。要求完成的主要任务：（包括课程设计工作量及其技术要求，以及说明书撰写等具体要求）1、输入电压198～240v时，给负载正常供电，显示2、输入电压Vi<198v，及Vi>242v时，对负载断电，并作高低超压显示3、电压恢复正常后，延时5秒，恢复供电4、25w灯泡作负载5、安装调试并完成符合学校要求的设计说明书6、设计电源；7、焊接：采用实验板完成，不得使用面包板。时间安排：十八周一周，其中3天硬件设计，2天硬件调试指导教师签名：年月日第2页共20页第1页共20页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第2页共20页系主任（或责任教师）签名：年月日第3页共20页第2页共20页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第3页共20页目录摘要································································1课题的提出依据和意义············································12本课题的主要任务和研究内容······································12.1本课题的主要任务···········································12.2本课题研究的主要内容·······································23电路组成和工作原理··············································33.1直流稳压电流部分···········································43.2延时电路···················································44电路元器件的选择与计算··········································64.1定时器IC的选择············································64.2电压取样单元元件选择·······································74.3延时电路元件选择···········································84.4直流稳压电源元器件的选择·····························第4页共20页第3页共20页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第4页共20页······85电路的仿真······················································96设计心得体会···················································13参考文献···························································14摘要随着我国人们生活水平的提高，电冰箱已经逐渐成为我国广大居民家庭生活必备的一种家用电器。然而，电冰箱的驱动电机在一定的电压范围内才能正常工作，供电电压过高或过低很容易导致绕组线圈烧毁。因此，电冰箱易损坏或寿命短是困扰人们的一个问题。究其原因，供电电压波动、瞬时断电是电冰箱损坏或寿命缩短的主要原因之一。而对于绝大多数家用电冰箱来说，瞬时断电与电压波动几乎是不可避免的。为此，我们利用变压器，再配以控制电路设计了一种自动稳压、自动延时的电冰箱保护器，该多功能电冰箱保护器能够根...
