《基于ATmega16的智能数控高压直流电源的设计》.pdf

34 4 Vol. 34 No. 4 734 2008 4 High Voltage ngineering Apr. 2008 ATmega16 廖 平, 陈 峰, 马洪秋 ( 中南大学机电工程学院,长沙410083) : , ATmega16 , , PWM / , : , : AT mega16; ; ; PWM ; PWM ; : T M86 : A : 2008 Design of Intelligent Digital Control HVDCPower Supply with ATmega16 LIAO Ping, CH N Feng, MA Hongqiu (College of Mechanical and lectronic ngineering, Central South University, Changsha 410083, China) Abstract: This paper mainly introduces the realization method of hardw are and softw are of intelligent digital control highvoltage direct current pow er supply by taking AT mega16 as the core. Both the softw are emulation and hard w are circuit debugging are adopted to achieve those functions of the power supply. The work principle of the system is generally introduced, then the analogue part and the digital part of the w hole hardw are circuit are also introduced, respectively .The function of the w hole bridge athw art converting circuit and the double voltage commuting circuit and the selection principle of those related components are explained. The generation principle of highfrequency PWM (Pulse Width Modulation) square w ave and its driving technique as w ell as the sampling feedback of the out put voltage/ current signal are focused on. The softw are design adopts the method for dividing the main task into several modules, taking tw o flow charts of PWM control and steady voltage adjustment for examples. The system a dopts keyboard and LCD to implement manmachine conversation and gets friendly manmachine interface. Tests show that this pow er supply can completely be used in the domain such as nucleus radiation detection inst