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Most electronic devices require AC power to work correctly because they are designed to be plugged into a standard wall outlet, which supplies AC power. These devices need a specific amount of low, regulated voltage in order to operate. AC power is e
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键盘是电子设备常见的输入装置,作为人们与电子设
备交流的重要途径,一旦出错,将影响到电子设备的整体
使用,所以键盘电路虽然简单,但键盘的稳定性、可靠性,
应引起足够的重视。
-The keyboard is a common input device for electronic equipment, as an important way of people and exchange of electronic equipment, once the error will af
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中文翻译
LED是如何工作的
通常被称为LED的发光二极管,使电子世界中真正的无名英雄。LED的功能多达几十种,被广泛的应用于各种装置之中。在其他应用场合,LED可以作为数字钟的数码显示、传送-TRANSIENT VOLTAGE SUPPRESSOR(TVS) Diode PRESENTATION
• High protection on sensitive mobile electronic devices
• Follow strictly to th
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锐志51单片机开发板的整体电路图 包含了很多电子器件的焊接方法-Overall Reiz 51 microcontroller development board circuit diagram contains a lot of electronic devices, welding method
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The inter-harmonics are due to the presence of
additional frequencies which are non-integral multiples of the mains frequency. Moreover,
notching is a periodic voltage disturbance caused by the normal operation of power
electronic devices when
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RFID stands for Radio-Frequency IDentification. The acronym refers to small electronic devices that consist of a small chip and an antenna. The chip typically is capable of carrying 2,000 bytes of data or less.
The RFID device serves the same p
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微电网的概念最早是由美国提出的[1]。2002年美国
CERTS对微电网概念提出了明确的定义,并且给出了微电
网的基本结构。它主要是通过电力电子装置将发电容量小
于500 kW的分布式电源和储能装置组织在一起,就近向
用户提供电能。灵活智能的电力电子装置是CERTS微电网
的关键所在,正是通过该技术来实现“即插即用”的控制
思想。目前,微电网的应用范围和电压等级正在不断的扩
大,已经由原来兆瓦级以下发展到几十兆瓦的规模,并有
望在更大的农村配电网得到进一步发展。-
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电能最基本的形态为:DC、AC
四大基本状态转换:
DC→AC、DC→DC、AC→DC、AC→AC
• 电力电子器件只是工作在两种状态
开通、关断
开通:即工作在高度饱和导通状态
如何利用电力电子器件的开通和关断两种状态实现电能四大基本状态之间的转换就是电力电子学所要研究的核心内容-The most basic form of power: DC, AC
Four basic state transitions:
DC → AC, DC → DC, AC
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Variable capacitors are key elements in electrostatic micro-power generators. In such devices inertial
forces are used to do work against the electric field of the capacitor, thereby converting mechanical
energy to electrical potential energy tha
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A seven-segment display (SSD), or seven-segment indicator, is a form of electronic display device for displaying decimal numerals that is an alternative to the more complex dot-matrix displays. Seven-segment displays are widely used in digital clocks
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Electronic industry now growing towards the automation of everything, It includes development of Touch screen Interface Voice Recognition etc. These are leads to a world in which almost all electronic systems are capable of working in response with h
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基于FPGA的变电站智能电子设备VGA控制器的研究-Research FPGA substation intelligent electronic devices based on the VGA controller
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electronics engineering introduce some semiconductor devices such as diodes, transistors, FET and their applications
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全控型电力电子器件取代半控型器件,变换技术由相位控制转变成脉宽调制 模拟电子控制已基本上让位于数字电子控制 交流可调拖动系统逐步取代直流拖动系统已经成为不争的事实,而且交流拖动控制技术本身也有不小的进展。-Full-controlled power electronic devices to replace semi-controlled devices, transform into the phase control pulse width modulation analog electr
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DNP3(分布式网络协议)是一组在过程自动化系统组件之间使用的通信协议。它的主要用途是在公共事业如电力和自来水公司。用法在其他行业是不常见的。它是为不同类型的数据采集和控制设备之间的通讯而设计的。它在SCADA系统中起着至关重要的作用,它是通过使用SCADA主站(又名控制中心),远程终端单元(RTU)和智能电子设备(IED)。它主要用于一个主站和RTU或IED之间的通信。(符合IEC60870-6的一部分),用于跨主站通信。-DNP3 (Distributed Network Protocol)
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本标准规定了主要为电子设备使用的印制线路板以下称为印制板通用要求相关的有外形等各种尺寸以及由专项标准规定的项目-This standard specifies the various sizes primarily used in printed circuit boards of electronic devices hereinafter referred to general requirements related to the PCB shape, etc., and there is
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Optical communication, also known as optical telecommunication, is communication at a distance using light to carry information. It can be performed visually or by using electronic devices.
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本技术报告适用于变电站自动化系统 (Substation Automation Systems-SAS)。它定义了变电站内智能电子设备(Intelligent Electronic Devices IEDs)之间的通信和相关系统要求。
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为评估电力电子装置对电网产生的危害和影响,为相应补偿装置的具体设计提供数值依据。以阻感负载的三相
桥式全控整流电路为例,理论分析并计算了其交流侧电流的谐波和功率因数;基于 Matlab/Simulink 建立的电力电子变流电
路模型,对三相桥式全控整流电路交流侧功率因数及其产生的谐波进行仿真分析。仿真使复杂的计算变得非常简便、直观,
且仿真结果与理论计算结果相差无几,从而证明了仿真研究的有效性和精确性。-To assess the risks and effects of power
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接地技术最早是应用在强电系统(电力系统、输变电设备、电气设备)中,为了设备和人身的安全,将接地线直接接在大地上。由于大地的电容非常大,一般情况下可以将大地的电位视为零电位。后来,接地技术延伸应用到弱电系统中。对于电力电子设备将接地线直接接在大地上或者接在一个作为参考电位的导体上,当电流通过该参考电位时,不应产生电压降。然而由于不合理的接地,反而会引入了电磁干扰,比如共地线干扰、地环路干扰等,从而导致电力电子设备工作不正常。可见,接地技术是电力电子设备电磁兼容技术的重要内容之一,有必要对接地技术进
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