电力操作电源系统的设计

为了进一步提高操作电源的稳定性,设计了一种基于AT89S51单片机控制的UPS-220V/3A电力操作电源系统.该系统主要由整流、直流变换、智能控制三大部分组成.首先整流部分利用该电路特有的两个控制环相互作用提高输入侧功率因数;然后直流变换部分采用高频逆变电路、高频变压器以及全波整流相组合以实现稳定的直流输出;通过输入模块和显示模块,调整充电电流等级和控制充电模式并进行显示;最后控制部分利用AT89S51单片机采集信号并进行处理,通过控制高频逆变模块来控制系统的稳定以及实现输出电压的可调.该操作电源系统在市电输入时能稳定电压;当市电断开或输入异常时,可对负载进行零时间切换供电.结果显示输出电压偏差在±0.5%以内,输出纹波系数在0.1%以内,供电稳定,负载正常运行.

Design of electric operation power supply system

To further improve the stability operation power,a UPS-220V/3A power system based on AT89S51 single chip was designed,which was mainly composed of rectifier,direct current converter and intelligent control.Firstly,the input power factor was increased by the interaction of two unique control loop of circuit in the part of rectifier.Secondly,the stable direct current output was realized by the combining high frequency inverter circuit,high frequency transformer with full wave rectifier in the part of direct converter.The charging current level was adjusted and the charging mode was controlled and displayed by input module and display module.Finally,AT89S51 single chip was used to collect and process the signals in the part of control; the stability of system was controlled and the tunable output voltage was realized by the control of high frequency inverter module.The voltage is stable in the operation power supply system when commercial power inputs.The electricity is switched to supply the load at the zero time when commercial power is off or inputs abnormally.The results show that the power supply stability and the normal operation of load output are realized at voltage error within 0.5 ％ and output ripple coefficient below 0.1％.