二次可调开关直流电源的设计  

Design of a Secondary Adjustable Switching DC Power Supply Design

作　　者：苏成仁[1] 刘永智[1] 

机构地区：[1]甘肃民族师范学院物理系

出　　处：《电子技术（上海）》2013年第2期49-51,共3页Electronic Technology

基　　金：甘肃省科技支撑计划项目:农牧区太阳能光伏CDMA/GSM信号处理器的应用研究(1104GKCP013)

摘　　要：当前实验用的低压直流电源,是把220伏交流电用变压器降压、整流滤波后再通过线性稳压电路和线性稳流电路对外供电。电源变压器体积大、重量大、工作温度高、电压适应范围小,用线性稳压电路稳压恒流电能利用效率低,电能的很大比例消耗在自身的电路上。提高低压直流电源效率的最有效办法采用开关电源,但开关电源只适合于输出电压固定(或变化范围不大的场合),为了解决上述问题,这里利用开关型稳压器件设计出二次可调开关直流电源,以替换现在实验室中普遍使用的直流电源。Current laboratory low-voltage DC power supply uses 220 volts AC to step-down the voltage with transformer, and rectifies and filters, then goes through linear regulator circuit or linear constant current circuit to output. The power transformer has large size and weight, high operating temperature, and small voltage range. Using linear regulator circuit to stabilize current is low in energy utilization efficiency, a large proportion of the electricity is consumed in its own circuit. The most efficient method to improve the efficiency of low-voltage DC power supply is to use switching power supply, but switching power supply is only suitable for fixed（or less variation） output voltage. In order to solve these issues, a secondary adjustable switching DC power is designed using switching voltage regulator, to replace commonly used DC power supply in laboratory.

关 键 词：线性稳压 线性恒流 开关电源 

分 类 号：TM44[电气工程—电器]