基于单片机技术的γ辐射仪高压电源设计  

Design of γ Radiometer High-voltage Power Based on MCU

作　　者：吴寿勇[1] 任家富[1] 侯国利[1] 陶永莉[1] 

机构地区：[1]成都理工大学,成都610059

出　　处：《核电子学与探测技术》2013年第9期1062-1064,1088,共4页Nuclear Electronics & Detection Technology

基　　金：国土资源部公益性行业科研专项

摘　　要：介绍了一种基于单片机产生脉宽调制(PWM)波的高压稳压电源设计,主要用于盖革-弥勒计数器的高压偏置源。由配置C8051f020的可编程计数器阵列PCA产生矩形控制信号,选用变压器隔离正激式变换拓扑结构和倍压整流电路。经过实验测试,当PWM波的占空比为55%时,输出高压400V,系统功耗155mW,电压稳定度小于0.5%,纹波小于100mV。电源性能稳定可靠,可用于γ辐射仪探测器的高压偏置源。The design technology of high -voltage power based on Pulse Width Modulation is introduced ,which is used as Geiger -Muller counter ’ s high voltage bias power .The rectangular signal is produced by configuring the Programmable Counter Array of C8051f020,the forward transformer -isolated topologiesand voltage multipl-ying rectifier circuits isreferenced .By lab testing , while the duty cycle of PWM wave is 55%the output high voltage is 400 V,system consumption is 155 mV,voltage stability is less than 0.5%,ripple is less than 100 mV.Considering the stability and reliability of the high -voltage power , it could be used as source of γRadiom-eter .

关 键 词：脉宽调制 可编程计数器阵列 高压电源 倍压整流占空比 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]