The modified types will not be equipped with commutation transformer and the three-phase alternating current power supply directly acquires DC voltage through bridge type rectifier.

改进型不配整流变压器，将三相交流电源直接由桥式整流获得直流电压。

High power factor stabilized voltage supply is a kind of high performance alternating current power supply which can not only steady the output voltage but also enhance the input power factor.

高功率因数稳压电源是一种既能起到稳压作用又可以提高电源输入端功率因数的高性能交流电源。

Some cutting-edge photovoltaic cells offer an even higher initial efficiency but fall behind when the DC power they produce is converted to grid-ready alternating current.

一些先进的光伏电池甚至可以提供更高的效率，但是由于要把直流电源转化为交流电，转换效率有所降低。

The system generates a direct current, so using it to power DC devices locally is more efficient than switching to the alternating current needed to feed it back to the grid.

该系统产生的电流为直流电，所以用来驱动本地的直流点装置比将其转化为交流电输入电网来的更有效率。

Step down transformers provide low voltage AC power for lighting, instruments and other circuits that use alternating current at a lower voltage.

降压变压器低压AC电源提供照明，仪器仪表和其他使用交流电在一个较低的电压的电路。

On the railway of electrization, power supply mode is requested to be the single-phase alternating current.

在铁道电气化牵引区段，牵引供电网采用单相工频交流电供电方式。

Primary electrical power is provided by two engine driven generators which supply three-phase, 115 volt 400 cycle alternating current.

主电力是由两个发动机驱动发电机供应三相，115伏400周期交流电。

Further, the current quadrilateral and admittance quadrilateral, as well as their similarity to the power quadrilateral in non-sinusoidal alternating-current circuits were derived.

由功率四边形进一步确立了非正弦交流电路中的电流四边形和导纳四边形，以及它们和功率四边形的相似关系。

It is intended primarily for alternating current (ac) power use, but has enough battery back-up power for an hour of operation.

该设备主要适用于交流电源(AC)，但是配备的电池储备电源足够使用1小时。

With the alternating current that flows through the power distribution system, the superconducting cables do suffer some losses of energy.

对于输电系统输送的交流电，超导电缆在传导时确实会损失一些能量。

Power supply or circuit capable of regulating either alternating or direct current within 5% of desired value, and limiting the open circuit (source) voltage to 20 millivolts maximum.

电源及能调节交流或直流电流在期望值的5%之内的，控制开路电压到最大20毫伏的路。

AC fault security power source system is to provide alternating current for unit safety shutdown when power cut happens for a long time due to power grid failure or other reasons.

交流事故保安电源系统是当电网发生事故或其他原因致使火电厂厂用电长时间停电时，提供机组安全停机所必需的交流用电系统。

Alternating current motor is the important power equipment applicated in various fields.

交流电动机是广泛用于各领域的重要动力设备。

In commercial models, the oven has a power input of about 1000 watts of alternating current.

在商业模式，烤箱都有一个电源投入约100 0瓦的交流电。

As most of the power loads of the existing merchant ships are driven by the alternating current induction motors, it is necessary to study their drag torque mechanical characteristics.

现代民用船舶的大多数动力负载由交流异步电动机驱动，因此，对其负载阻力机械特性的研究很有必要。

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.

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；

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.

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。

There are several alternate means of transmitting electric power, for example, by alternating or direct current, overhead or underground cable, and all over a wide range of voltages.

有多种送电途径可选择，例如由交流或直流，架室线或地下电缆送电并有各种电压等级。

These included alternating- and direct-current converters, and sensors that could moderate the power consumption of streetlamps, fridges and air conditioners.

这些产品包括交互式和直流转换器，能够节省路灯，冰箱和空调用电的传感器。

It introduces the methods of alternating current sampling for the power parameter of sing chip computer in ferroalloys furnace.

介绍了铁合金电炉单片机电力参数的交流采样方法。

It was analyzed why the tolerance of the measurement unit of alternating current for high-power silicon rectification being large. Some concrete improvement measures on it was given.

分析了造成大功率硅整流交流电能计量装置计量误差大的原因，介绍了具体的改造内容。

A power converter circuit (3) drives a switching device by the pulse-width modulated wave for converting a direct current into the three phase alternating current.

电力变换器主电路部（3），其根据该脉冲宽度调制波对 开关元件进行驱动，将直流电压转换为三相交流电压；

Workless power is an important factor in designing and running of alternating current system. A compensation device is needed in substation and the end users to save electricity.

无功功率是交流电力系统设计和运行中的一个重要因素，为了减少电能损失，需要在电力用户端与电力系统的变电所内合理配置一定的无功补偿装置。

The main coil is wound the main core part, which is used as the output port of the power adapter to output the alternating current.

和主线圈，该主线圈缠绕着主芯部，充当电源适配器的输出端口输出交流电。

When the power machines of wind-tunnel work such as alternating-current machine governor and direct-current machine governor and relay, they will bring about strong interference.

风洞中交流电机调速器、直流电机调速器及继电器等动力设备运行时将产生强干扰。

The function of the power supply is converting the alternating current provided by the power plant into direct current required by normal computer system.

电源供应器主要是用来将发电厂提供的交流电转变为一般电脑系统所需求的直流电。

The utility model relates to a power saving device for an alternating current contactor, composed of a casing, a starting system and a maintaining system.

本实用新型是一种交流接触器的节电器，由壳体、启动系统、维持系统组成。