选择交流电作为工业标准的原因很简单，在早期供电距离很短的电网里，交流电的损耗比直流电小。
The reason was that over the short distances spanned by early power grids, AC transmission suffers lower losses than DC. It thus became the industry standard.
由于在传输过程中采用高压直流电缆输送的损耗要比传统交流电的损耗小得多，因此采用交流电远距离传送电力很不划算。
Energy losses on DC lines are far lower than on the traditional AC ones, which make transmission of energy over long distances uneconomic.
交流电与直流电的不同之处在于交流电不断地改变其电流流动方向。
Alternating current is different from direct current in that it constantly changes its direct of flow.
在连接交流电源之前，请验证交流电压、相位和频率是否与控制装置外壳门参数板上的相应数据相同。
Verify ac line voltage phase and frequency with the controller data plate on the enclosure door prior to connecting ac power.
电瓶充电器，用交流电向飞机内电瓶充电的电气装置。带有交流电的电气装置，该装置产生直流电向飞机上的电瓶充电。
Battery CHARGER, an electrical device supplied with alternating current, which produces a direct current output for charging the battery on the airplane.
AC适配器(这是交流电源更准确的说法)只是把来自墙上插口的交流电转化为低伏特、低安培的直流电源，并通过USB接口充入手机。
The ac adapter (as it's more accurately known) simply converts the ac current from a wall outlet into low-voltage, low-amperage DC current that it provides via a USB port.
在计算电缆群载流量时，交流电阻是一个重要的参数，其中邻近效应是计算交流电阻的一部分。
Ac resistance of cable conductor is an important factor to calculate the ampacity of cable bundles, and proximity effect factor is an important parameter to affect ac resistance.
必须查看本机交流电压选择器之预调状态是否符合本地交流电压。
Selector Setting should be checked to see that it conforms to the local AC supply voltage.
示零器电路改进后的交流电桥，增大了示零器电路的内阻，提高了交流电桥的灵敏度，对任何形式的电容电桥、电感电桥都适用。
The increased internal resistance within an improved zero indicator helps increase the sensitivity of the AC bridge and thus can be available for any type of capacity bridge and induction bridge.
逆变器是负责把直流电转换为交流电，保证交流电负载设备的正常使用。
Inverter is responsible for the direct current into alternating current, AC load equipment to ensure the normal use.
本文阐述了交流电动机软起动控制器的控制原理，与常规的交流电动机起动控制器相比所具有的优点和特点。
This article describes the control principle of soft starter of alternate current electric motor, and the excellence and characteristic than normal starter.
作为参考的交流电机电动势与另一台交流电机或无限大母线电动势之间的相角差。
Phase difference between the e. m. f. of an alternator taken as a reference and that of another alternator or that of an infinite bus.
必须查看本机交流电压选择器之预调状态是否符合本地交流电压。
The voltage Selector Setting should be checked to see that it conforms to the local AC supply voltage.
变交流电为直流电或者变直流电为交流电的装置。
The AC output must therefore be rectified, or changed to dc.
本文介绍交流电桥平衡条件和一种快速调节交流电桥平衡的方法，对初学者大有益处。
This paper presents balanced condition of ac bridge anda kind of fact-adjusting method on ac bridge balance which in a effective method while being applied for teaching.
提出了一种利用正弦交流电压和电流的瞬时值测量正弦交流电参量的新算法。
Adopting sinusoidal instantaneous voltage and current, a new algorithm for measuring sinusoidal electrical parameters has been put forward.
并在此基础上分析了影响交流电参量的实时准确测量因素和交流电实时测量方法。
After that, the author explore the factors which affect the real-time accurate measurement of the alternate current Parameters and discuss the realtime measurement methods of the alternate current.
对逆变方波交流电弧喷涂过程中电弧区的动态行为进行了一定试验分析，得出逆变方波交流电源是理想的电弧喷涂电源。
It is also proved to be the ideal power source for arc spraying process according to the experimental analysis of the dynamic behavior in arc.
该DC /AC转换部分直接转换为电流输入由直流电源成交流电，并输出交流电。
The DC/AC conversion section converts a direct current inputted from a direct current power source into an alternating current, and outputs the alternating current.
设计开发一种工业用三相交流电参数仪，能够测得三相交流电各相的电压、电流、功率、功率因子等参数；
A three-phase alternating current parameters instrument to be used in industry is designed. It can measure the voltages, currents, power factors of each phase of three-phase alternating current.
其基本原理是将交流电机的滑环输出功率通过整流电桥和有源逆变器送回交流电网。
The basic principle of the system lies in feeding back the output power at the motor slip rings of an AC motor into the mains through a bridge rectifier and an inverter.
变压器：属于静止电机，可改变交流电能的电压，变压器：属于静止电机，可改变交流电能的电压，甚至也可改变相数、频率及相位。甚至也可改变相数、频率及相位。
Transformer: It belongs to static EM, It can be used to change the Voltage, the Current, the phase No., the frequency and the phase of the Electrical power.
基于上述三相交流电弧炉电路模型，分析了电流不对称和阻抗不对称对电弧功率的影响，并讨论了交流电弧炉三相电参数互相影响的复杂性。
The influences of the asymmetry of current and impedance on the arc voltage and power were analyzed, and the investigation complexity was also discussed.
依据交流电机的控制策略，提出了适用于电动汽车交流电动机控制的变频变压调速和矢量控制两种控制的实现方法。
According to the control strategy of ac motors, the two control means put forward to be applicable to electric vehicle about VVVF and space vector.
交流电动机——用交流电流来转动的电动机叫交流电动机。
AC motor - with AC current to the motor rotation is called AC motors.
介绍一种按照实际交流电弧的特性设计的三相交流电弧炉仿真试验系统，针对电弧炉电极升降控制提出了一种基于DSP的控制方案。
This paper introduces a simulation experimental system of 3-phase ac arc furnace, developing a DSP based electric-arc furnace electric pole fluctuation control system.
交流耐压试验是交流电气设备最重要的试验项目，是考验被试品绝缘承受交流电压能力的有效方法。
AC Withstand Voltage test is the most important test item to AC electric equipments, is a valid method of trying out the ability of the insulation withstanding AC voltage of tested object.
本发明属于交流电机设计制造领域，特别涉及一种消除定子铁心扣片外鼠笼效应的交流电动机结构。
The invention relates to a field of an ac motor design and manufacture, in particular to an ac motor structure capable of eliminating stator core buckle slab external squirrel cage effect.
本实用新型的名称为交流电动机液态智能软起动装置。属于交流电动机软起动装置技术领域。
The utility model is a liquid intelligent soft starter for AC motor, belonging to the AC motor soft starter technology.
通过对交流电机调速以及变频器的原理分析，确定了利用单片机对交流电机实行遥控控制的方法。
Based on analysis of principle of AC motor speed adjusting through frequency converter, the system of AC motor speed remote regulation by means of MSP430 single-chip microcomputer is explained.
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