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This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage value s.

摘 要：本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

Abstract摘要:This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

论文摘要摘要：本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

Keywords: regulated power supply of direct current; single2ch ip m icrocomputer, digital control Abstract:This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

数控直流稳压电源论文关键词：论文关键词：直流稳压电源单片机数字控制论文摘要：论文摘要：本系统以直流电压源为核心，AT89S52 单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达 0.1V，输出电压范围为 0—9.9V，最大电流为 330mA，并可由液晶屏显示实际输出电压值。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

论文摘要：本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

This system to dc voltage source as the core, mainly AT89S52 SCM, through the keyboard controller to install dc power supply output voltage, setting stepping class can reach.01v output voltage, the range of 0-9.9 V, the maximum current 330mA for, and can show the actual pipe by digital output voltage values.

本系统以直流电压源为核心，AT89S52单片机为主控制器，通过键盘来设置直流电源的输出电压，设置步进等级可达0.1V，输出电压范围为0—9.9V，最大电流为330mA，并可由液晶屏显示实际输出电压值。系统有过流保护电路，当输出电流过大时功率管自动截至，而且有红色指示灯发出警报。

The lead-in voltage and out-of-line voltage of switchbox are detected and converted into frequency signal. The arc voltage signal can be obtained by measuring the two signals. The arc voltage signal and arc light intensity signal are sent to the advanced single-chip microcom puter, PIC16F877, to do synthetic analysis – judgment.

提取配电箱的进线电压和出线电压，分别转换成频率信号进行比较，获得电弧电压信号，并将其和弧光信号一起送入性能先进的PIC16F877单片机，做综合分析判断。

The system voltage instability risk indices that are obtained using the risk assessment method include the voltage instability probability, expected load curtailment to avoid voltage instability, and the relationship between load curtailments and voltage instability probability.

该方法考虑发电机可用发电容量、电网结构及负荷的概率不确定性因素，利用蒙特卡洛模拟法抽样系统样本，并以所提电压稳定校正控制方法来判断样本的静态电压稳定性以及对样本进行电压稳定校正控制。

The transit time and gain characteristics of electrons which travel in the micro-channel plate gated by picoseconds high voltage pulse were simulated. The curves of the transit time versus the voltage pulse width and the voltage amplitude are obtained when the waveforms of the voltage pulse are Gauss, triangle and trapezoid.

对皮秒高压脉冲驱动下微通道板中电子的渡越时间特性和增益特性进行了数值模拟，在电压脉冲波形分别为高斯形、三角形和梯形时，得到了电子渡越时间与电压脉冲宽度、幅度的关系曲线。

Against the models established, the equivalence of DC voltage, OWV and VLF voltage to AC voltage has been widely investigated. It is found that the equivalence factor of OWV is between 1.2 and 1.8, that means OWV has a good equivalence to AC voltage.

针对建立的试验模型，讨论了直流电压、振荡波电压、超低频(0.1Hz)电压与交流电压的等效性，发现振荡波电压的等效系数在1.2-1.8之间，与交流电压等效性较好。

The devices can operate at a supply voltage 110mV above the output voltage under specified load conditions, except the REF3312 which requires a minimum supply voltage of 1.8V.

设备可以在高于输出电压低于规定负载的110MV下操作，除REF3312，因为REF3312要求1.8V的最低电压。

Aquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales.

生活于水中或湿地的蕨类；从新生代生存至今；有时归于石松目之中。

The engine was uprated from a 90hp Franklin to a 125hp Lycoming.

改良过的引擎是从90hp到125hp莱康明富兰克林。