数控直流稳压电源设计

Design of Digital Control Direct Current Voltage-stabilized Source

系统由直流稳压电源部分、A/D转换及显示部分组成,其中直流稳压电源部分采用单电源可调电路的方法,核心部分通过CW317实现输出电压U_0可调,另外电容C_3、二极管IN4148在R短路时起保护作用,继电器K在CW317短路时起保护作用,A/D转换器及显示部分主要功能是将前一部分输出的电压U_0,通过MC14433、CC4511、MC1413以及相应的共阴极LED数码显示管,变换成可显示的四位数,最终将结果在LED组上显示出来;文章中对数控直流稳压电源的主要性能参数进行了测定,证明该系统已达到设计要求,并详细介绍了直流稳压电源的短路保护。

The system consists of direct current vohage-stabilized source , A/D switching part and displaying corriponent. Specifically, single power adjustable clearance is adopted for the DC voltage-stabilized. Source and the output voltage U0 is adjusted by CW317 in the cen tral section. In addition electric capacity C3 and diode IN4148 can protect the circuit when short circuit happens, and so do relay K. The main function of the A/D switching and displaying segments is to transform the output voltage U0 into displayable 4 bit digit through corresponding chip group and finally displayed in LED. In this article, ensures checking of the primary parameter of direct current voltage-stabilized source. And it confirmed that the system has reached the anticipating objective, and describe how to protect the short circuit of direct current voltage-stabilized source.