电流

Three-phase bridge incontrollable full-wave rectifier circuits and the inverter circuit constitute the main circuit of AC-DC-A voltage source inverter system.

该方法通过判断输出电压矢量的角度来获取三相电流的方向，避免了电流检测中多个零点的现象。

Switching Power Supply with the traditional distinction between :(1) not only the output voltage feedback, feedback from the average input current;(2) Current benchmarks signal voltage error signal and full-wave rectifier voltage signal sampling the product.

与传统开关电源的区别是：不仅反馈输出电压，还反馈输入平均电流；(2)电流环基准信号为电压环误差信号与全波整流电压取样信号之乘积。

The "tile"is a power unit but , is voltage and voltaic product, voltage is to maintain fundamental note type computer operation operating voltage , electric current is the situation looking at operation , power consumption having diversity but, power consumption is higher if opening DVD and the trumpet , pure await the opportune moment power consumption is lower , the entirety comes say therefore the machine power consumption is not fixed, but is status have height to have consuming an electricity low.

而"瓦"为功率单位，为电压与电流的乘积，电压为维持笔记型电脑操作的基本工作电压，电流则视操作的状况，而有不同的耗电量，如开启DVD及喇叭耗电量较高，纯待机耗电量较低，所以整体来说，机器的耗电量不是固定的，而是有高有低的耗电状况。

A novel non-positive fundamental sequence voltage and current detecting method is presented based on analyzing the function of trigonometric function in detecting the fundamental positive sequence voltage and current.

针对此问题，本文在分析三角函数提取基波电压电流成分有关信息的基础上，提出了一种检测UPQC电压电流信号的新方法。

A quantitative analysis for dynamic stability of a set of superconducting partial torus in a fusion reactor under a pulse current over a stationary current is given.

对于聚变反应堆中超导载流磁体在稳态电流基础上受到脉冲电流影响时的动力稳定性给出了定量分析方法。

Firstly, Hallen integral equation was performed to analyze the antenna. Then, the Equivalent Theory was used to build the electric field integral equation, the EFIE was translated into matrix equations by Galerkin method, and the scattering field can be calculated by the surface currents of the metal target. Finally, numerical calculation to representative scatters was conducted.

首先推导了有耗媒质中圆柱对称天线的海伦积分方程；然后利用等效原理建立导体表面的电流积分方程，并采用伽略金方法将积分方程组转化为矩阵方程组，求解出散射体表面的等效电流分布，计算出其散射场；最后以典型散射体为例，进行了仿真计算分析。

From the perspective of minimum transmission losses, an instantaneous reactive power theory for systems with any number of phases and with or without neutral line is developed. Under the new definition, each quantity has its own physical meaning, and the zero sequence current can be decomposed into active and reactive components. Furthermore, a generalized compensation method for zero sequence current is developed.

从输电损耗最小的角度出发，提出了任意相无中性线或有中性线系统的瞬时无功功率理论，在新的理论下，每个量都有清晰的物理意义，且能分解出零序电流的有功分量和无功分量，并给出了通用的零序电流补偿方法，揭示了瞬时无功功率理论与传统平均意义下的无功功率理论的联系及本质区别，从而为研究HVDC-VSC及各种FACTS装置的无功功率控制奠定了理论基础。

The contributions to the induced current and voltage by various electromagnetic field components, such as the vertical electrical field, the horizontal electrical field and the horizontal magnetic field, are compared in this paper in terms of integral of Green function and superposition theorem.

结果显示，Agrawal和Taylor模型得到的电压、电流响应是一致的，可以考虑在有界波电磁脉冲模拟器中进行短线缆的效应实验；由于相同的场分量在不同的模型中对电压、电流响应的贡献并不相同，因此在阐述某一场分量对线缆响应贡献大小时，应该首先说明所采用的传输线模型。

According to the development plan of North China Grid and the short circuit current increasing cycle and period of Beijing-Tianjin-Tangshan Grid,rational control scheme of short circuit current and countermeasures are put forward.

根据华北电网的发展规化，针对京津唐电网短路电流增长的周期性和阶段性，提出了合理限制短路电流水平的思路和对策。

The capacitance capacitors and inductors of power grid form parallel resonance circuit .It's frequency may be related to the existing power grid close to the harmonic frequencies, If there is power grid harmonic current sources, harmonic resonance caused by enlarged so that the voltage and current waveform distortion even more serious.

电容器的电容和电网的电感形成并联谐振回路，其频率可能与电网中存在的谐波频率接近，如果电网存在谐波电流源，谐振引起的谐波放大使电压和电流波形畸变更为严重。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。