家电延时保护器.doc

课程设计任务书 学生姓名： 洪磊 专业班级： 通信1304班 指导教师： 周鹏 工作单位： 信息工程学院 题 目：S66型收音机的设计制作 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，及时，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 时间安排： 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 系主任（或责任教师）签名： 年 月 日 目 录 摘要········································································3 1 本课题的设计任务、技术指标和要求··············································3 1.1 设计任务··································3 1.2 技术指标和要求·····························4 2 总体电路功能框图、电路组成和工作原理·····················4 2.1 直流稳压源部分····················································5 2.2 电压比较器··························································5 2.3 555延时电路·························································6 2.4 电磁继电器···························································7 3 电路元器件的选择与计算····························7 3.1 定时器NE555的选择·····················································7 3.2 直流稳压电源元器件的选择············································9 3.3 电压取样单元元件选择················································9 3.4 延时电路元件选择····················································9 4 电路的仿真································································9 5 实物安装与调试····························································11 5.1装配图································································11 5.2装配、焊接与调试·······················································12 6 调试中出现的问题以及解决办法························12 7 元件清单表································································13 8 设计心得体会、建议································13 9 参考文献··································································14 10 附录：完整电路图，仿真电路图截图·····················14 摘要 电冰箱易损坏或寿命短是困扰人们的一个问题。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。供