江苏建筑职业技术学院学报
江囌建築職業技術學院學報
강소건축직업기술학원학보
Journal of XUZHOU Institute of Architectural Technology
2012年
4期
25-27,47
,共4页
MSP%430-G%2553%单片机%恒流源%直流电子负载%电流采样%电压采样
MSP%430-G%2553%單片機%恆流源%直流電子負載%電流採樣%電壓採樣
MSP%430-G%2553%단편궤%항류원%직류전자부재%전류채양%전압채양
M SP430-G 2553%single chip microcomputer%constant--current,source%DC elec-tronic load,current samDling%voltage sampling
直流电子负载系统是基于MSP430-G2553单片机的直流电子负载．主要由核心控制电路（单片机）、功率控制电路、电压采样电路、电流采样电路、集成运放电路、LCD显示电路、报警电路和过压保护电路等组成．通过键盘电路输入设置电流值，单片机输出PWM信号，经内部D／A转换电路，把数字信号转换成模拟信号，以及集成运放后控制功率控制器件的导通，从而改变外接被测电源设备流过电流的大小．具有实时显示电压和电流、过压保护等功能．
直流電子負載繫統是基于MSP430-G2553單片機的直流電子負載．主要由覈心控製電路（單片機）、功率控製電路、電壓採樣電路、電流採樣電路、集成運放電路、LCD顯示電路、報警電路和過壓保護電路等組成．通過鍵盤電路輸入設置電流值，單片機輸齣PWM信號，經內部D／A轉換電路，把數字信號轉換成模擬信號，以及集成運放後控製功率控製器件的導通，從而改變外接被測電源設備流過電流的大小．具有實時顯示電壓和電流、過壓保護等功能．
직류전자부재계통시기우MSP430-G2553단편궤적직류전자부재．주요유핵심공제전로（단편궤）、공솔공제전로、전압채양전로、전류채양전로、집성운방전로、LCD현시전로、보경전로화과압보호전로등조성．통과건반전로수입설치전류치，단편궤수출PWM신호，경내부D／A전환전로，파수자신호전환성모의신호，이급집성운방후공제공솔공제기건적도통，종이개변외접피측전원설비류과전류적대소．구유실시현시전압화전류、과압보호등공능．
DC electronic load system is based on MSP 430 - G 2553 single chip microcomputer (SCM), which is composed of core controlling circuit (SCM), power controlling circuit, voltage sampling circuit, current sampling circuit, integrated operational amplifier circuit, LCD display circuit, alarm circuit and over-voltage protection circuit. Current value is set by keyboard circuit and PWM signals are output by SCM, then the digital signals are transformed into analog signals through inner D/A conversion circuit. According to connectivity situation of power control device after integrated operational amplifier, current value going through external tested power-supply device is changed. The system has function of real time display of voltage as well as current and over-voltage protection.
