高精度、宽输出高压直流电源控制模块的设计  

Design of Control Module for DC Power Supply with High Precision and Output Range of Voltage

作　　者：孙晨晨[1] 张强[1] 徐玮巍 高颂[1] 赵华[1] Sun Chenchen;Zhang Qiang;Xu Weiwei;Gao Song;Zhao Hua(School of Physics and Technology,Nanjing Normal University,Nanjing 210023,China)

机构地区：[1]南京师范大学物理科学与技术学院,江苏南京210023

出　　处：《南京师范大学学报（工程技术版）》2018年第3期69-73,共5页Journal of Nanjing Normal University(Engineering and Technology Edition)

基　　金：江苏省高等学校自然科学研究面上项目(18KJB510020);国家重点研发计划地球观测与导航重点专项(2017YFB0503500);教育部产学合作协同育人项目(201702084020;201702109082)

摘　　要：针对经典的密里根油滴实验对直流电源的高精度、宽输出等要求,进行了高压直流电源中控制模块的硬软件设计.采用了双12 bit数模转换并联构成14 bit数模转换的方法,在不增加成本的基础上,提高了控制电压的分辨率.采用软件补偿的方法提高控制精度,将实际控制电压的最大误差由0.12 V改善到了0.000 6 V.实验结果表明,高压直流电源的输出范围为-1 200～1 200 V,精度为±0.072 V.This paper completes the hardware and software design of the control module in the DC power supply with high precision and output range of voltage. This design uses a double 12-bit digital-to-analog conversion to form a 14-bit digit- al-to-analog conversion method,which improves the resolution of the control voltage without increasing the cost. In order to improve the actual control accuracy feature, the design uses software compensation method to improve actual control voltage maximum error from 0.12 V to 0.000 6 V. Through this design, DC power supply can achieve requirements of the output range of -1200- 1200 V and the accuracy of ±0.072 V.

关 键 词：高压直流电源 控制模块 数模转换模块 软件修正 

分 类 号：TH711[机械工程—测试计量技术及仪器]