带漏电保护功能的直流稳压电源的设计

本文以STC12C5A60S2单片机为主控制器,设计了一种带漏电保护功能的线性直流稳压电源.电源主电路利用TL431产生2.5V基准源,将输出电压反馈过来和基准源比较,控制TIP127三极管导通,实现稳压输出.单片机首先利用10位内置ADC对输出电压、电流信号采集,然后完成相应的保护功能,最后将各参数送LCD显示.测试结果表明,该电源工作可靠、性能良好、稳定电压稳定,且输出电流可大于1A,电压调整率、负载调整率均在理想的范围之内.     

直流稳压电源及漏电保护装置设计

提供一种线性直流稳压电源及漏电保护装置的设计方法,以芯片LM2577、LM2576和单片机为核心制作DC—DC转换器,提供额定输出电压为5V±0.05V、额定输出电流为1A的直流稳压电源。可以实现直流电压输入5.5~25V,输出电压保持在5V±0.05V,电压调整率SU≤1%;当输入电压为7V,直流稳压电源输出电流由1A减小到0.01A,负载调整率SL≤1%,并能够实现功率测量与实时显示,能够实现对模拟漏电支路的漏电保护动作。     

直流稳压电源及漏电保护装置系统研制

设计了一种输入电压为5.5V～25V,输出电压为5V的直流稳压电源及其漏电保护装置系统.直流稳压电源模块采用达林顿管TIP42、OP07运算放大器及三极管构成一个深度负反馈稳压电路.输出电压经ADS1286转换为数字量后送入单片机采样输出电压,经霍尔电流传感器CSM002A、跟随器OP07后,送入ADS1286,转换为数字量后送入单片机采样负载电流.由软件程序计算功率,并在液晶上显示.通过采样负载电流与总电流的差值实现漏电检测,并进行漏电保护.经测试,系统电压调整率Su≤1％,负载调整率SL≤1％,5.5V ～ 25V输入,输出为5±0.05V.     

基于MSP430F169单片机的直流电子负载的设计

为了智能测量和研究直流稳压电源、蓄电池等电源的负载特性,设计了一台以TI公司的16位超低功耗单片机MSP430F169为中心控制的直流电子负载。外置16位D/A转化芯片ADS1115实时高精度采样电源电压和电流信号,经过单片机程序控制,单片机内置12位D/A转换电路输出一个直流信号并经过运放放大后驱动功率MOS管工作。MOS管作为功率消耗元件,整个电路构成了电压和电流闭环调节系统,可工作于恒压和恒流2种模式。被测电源的输出电压、输出电流和负载调整率可以实时测量并显示在图形液晶显示屏上,电流和电压的测量精度可达（0.02%±0.02%FS）。电子负载人机交互友好,测量精度高,单片机外围电路简单,可靠性高,扩充性好,具有很强的实用价值。     

直流稳压电源及漏电保护装置设计与实现

本设计分两部分:直流稳压电源部分和漏电保护部分,核心思想为PID调整,硬件主要包含4个模块:微控制器核心模块、直流稳压电源调整模块、漏电保护控制模块以及液晶显示模块。微控制器选用STM32,电源额定输出电压5V,微控制器根据采样到的电压计算出功率,并实时显示。漏电保护控制模块的动作电流为30mA,由漏电保护控制模块控制断电。     

程控稳压电源的设计与实现

为设计并实现具有输出电压调节功能的直流稳压电源,采用STC89C51RC单片机为核心控制器,用输出信号采集调理电路对输出的电压、电流进行实时采样,并将采样值送入控制器处理,然后在数码管上显示当前输出的电压或电流值。通过按键可以自己设定输出电压值,然后由DAC转换电路将设定值转换后由模拟电路输出。系统具有过流保护和报警提示功能。实验结果表明该系统性能稳定可靠,有很好的应用价值。     

智能型高压漏电保护装置的改进

提出了一种利用单片机对零序电流和零序电压进行相位比较,改进一般智能漏电保护装置的新方法.该方法可以加快漏电信号的检测速度,减少中间处理环节,提高保护系统的可靠性和灵敏度.     

降压型直流开关稳压电源实验装置设计

以TI公司的同步降压控制器LM5117为主芯片,配以CSD18532KCS MOS场效应管作为驱动,辅以MC9S12XS128单片机控制构成一个开关稳压电源。该系统具有过流保护、负载识别(漏电检测)等功能,可以实现额定输入电压从13V至18V变化时输出稳压为5V,输出电流最大值达3.2A。该电源具有效率高、抗干扰性强等特点。     

磁耦合谐振式无线电能传输的智能稳压电源设计与实践

结合磁耦合谐振式无线电能传输的相关系统,以高性能单片机为控制核心,设计了一款连续可调、两路输出、数字化、智能化的稳压电源。其中将无线电能传输系统产生的电能作为稳压电源系统的驱动电压,采用按键输入的方式,集成各种数据处理电路,在检测和控制软件的支持下,调整和控制稳压电源的工作状态,实现两路电压的输出,并用实验验证了该系统的可行性。实验结果表明,该电源稳定性较好,可靠性较高,其性能优于传统的直流稳压电源。     

一种高效率低纹波的降压型DC-DC变换器设计

为解决DC-DC变换器的效率和纹波之间矛盾,以LM5117和CSD18532KCS为核心器件,采用同步BUCK拓扑结构,实现降压型DC-DC开关稳压电源设计.该电源重量小于70 g,具有50Ω~13.2 kΩ的负载识别功能;在输入电压为10~16 V时,输出为5 V,且在输出电流大于3.2 A时能自动过流保护,负载调整率为0.2%,电压调整率为0.07%,纹波小于30 m V,效率达94%.测试结果表明,该电源效率高,纹波小,重量轻,应具有广泛的应用前景.     

卡思卡特城堡

It is worthy of noting that, whilst Crookston Castle witnessed the earlier and happier portion of Mary's variegated life,     

不同的吃喝玩乐

一、吃和喝吃苹果 eat an apple, 吃药 take medicine,吃糖 have some sweets,吃饭 have one's meals,吃馆子 dine out,吃惊 be surprised/     

漏洞百出的教育

Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help?     

汉字倒说

汉字的六书,《说文》对“转注”一类,语焉不详。后世学者提及转注,也仅限于许慎所举出的例字。《汉字例说》一文,作者从转注的角度综合考虑,对部分现代常用字作了分析,跟传统的解释有所不同。希望能抛砖引玉,互相切磋,以推进学术研究。     

只要努力,不要后悔

There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love.     

浅谈移民问题

Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject.     

Sister Carrie, an Adherent of Desires

Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities.     

Improvement of one-cycle controller by use of proportional integral differential controller

1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec…     

钱生钱!

我们绝大部分人都同意一件事情——我们喜欢金钱。但是你对金钱的喜欢之情足够到让你创立一份事业么?.财富通常被人忽视,主要在于人们不能真正了