小型高压开关电源设计  

Design of Compact High-voltage Switching Mode-power Supply

作　　者：马跃[1] 邓玉福[1] 于桂英[1] 

机构地区：[1]沈阳师范大学物理科学于技术学院,沈阳110034

出　　处：《沈阳师范大学学报（自然科学版）》2011年第1期30-33,共4页Journal of Shenyang Normal University:Natural Science Edition

基　　金：辽宁省自然科学基金资助项目(20092069);沈阳师范大学实验中心主任基金项目(SYZX01)

摘　　要：高压直流电源在科学和工业生产中有着广泛的应用,是光学仪器,医疗设备,质谱分析,静电喷涂,激光器,X射线衍射仪以及其他一些分析成像射线类仪器中不可缺少的重要部件。传统的高压电源多采用线性技术,这种结构形式造成电源变换效率低,体积大,重量沉,操作维修不方便。随着电源技术的发展,人们对高压电源的智能化程度、转换效率和带负载能力提出了更高的要求。设计了一种以单片机和脉宽调制(PMW)技术为基础的智能化小型高压电源。该电源由STC89C51单片机和脉宽调制芯片TL494控制,采用单端式开关电路,高频逆变信号经变压器升压和倍压整流后输出直流。控制电路采用数字调节、闭环实时监控。该高压电源具有通用性强、输出可调范围宽、稳压精度高、控制性能优良等特点。High voltage power is extensively used in scientific and industrial applications.As one indispensable component,custom designed high voltage power supply can be found in instruments for spectroscopy,medicine,mass spectrometry,electrostatic spraying,lasers,spectrometers,X-ray diffraction,and many other analytical imaging and process applications.Traditional high-voltage power supply mainly adopts of linear technology,which is low conversion efficiency,large volume,heavy,and inconvenient of operation and maintenance.With the development and advantage of power supply technology,the requirements of intelligent level,conversion efficiency and load capacity are becoming stronger.This paper describes a high voltage switching power supply that based on SCM and PMW technology.This kind of power supply adopts single ended type promote and controlled by STC89C51 SCM and TL494.By means of combining diodes and capacitors,the circuit converts AC electric power delivered by the transformer to higher DC voltage with the act of rectifying and smoothing.The power adopts digital regulation and closed loop real-time monitoring to cooperate with an analog circuit.The advantages of the power supply are obvious,such as strong generality,wide output range, high stable voltage accuracy,excellent control property,etc.

关 键 词：单片机 高压开关电源 TL494 

分 类 号：TN86[电子电信—信息与通信工程]