文档介绍：正负可调直流稳压电源设计
姓名:张平
学号:141900143
专业:电子信息工程指导老师:李继强
学院:电气信息学院
日期:2015年01月01日
摘要
在电子电路设计中,最离不开的就是电源。不管是调试测试电路,还是驱动电路,这些都离不开电源的应用。在本设计中采用5W,220V—12V的变压器来将220V电压降压。用三端可调节正电压稳压器LM317和三端可调节负电压稳压器LM337形成正负电压生成电路。正负可调直流稳压电源由电源变压器、整流电路、前级滤波电路、稳压电路和后级滤波电路共五部分组成。设计的可调电源具有电压正负可调、电路简单、成本低廉的优点。在电路中由于需要交流变直流,所以采用各种电容,运用电容充放电的原理来调整交流电到直流电。
关键词:可调电源电容滤波稳压
I
Abstracted
Adjustable DC regulated power supply is a DC power supply is often used in the
real experiment, its main principle is divided into four parts, transformer,
rectifier,
filter, adjustable output. The four part is the title of one step one step, are
indispensable. After the regulation and role of the four sector, will put the 220V AC
sinusoidal into positive and negative adjustable DC power supply voltage regulator.
To act with voltage of the chip LM317 and LM337. The two chip can lead in the
middle bridge rectifier, voltage can be adjusted to achieve positive and negative.
Key word: adjustable power source;Capacitance smoothing ;
voltage stabilization ;
II
目录
摘要.............................................................................................................................. I Abstracted ..................................................................................................................... II 目录............................................................................................................................ III
第一章方案论证和比较.............................................................................................. 1
设计任务......................................................................................................... 1
设计方案与选择............................................................................................. 1
设计方案比较...................................................................................... 1
方案选择确定...................................................................................... 1