查询词典 single phase

According to the superposition principle of electric circuits, the post-fault power network is equivalent to the superposition of network in normal state and that composed by fault components; then taking single-phase system for example, the fault distance and asynchronous time are taken as unknown numbers and the fault location equations for normal voltage and current phasors as well as fault components are established; and then the analytical expression for fault distance is deduced, in addition the recognition method of false root is given.

该算法根据电路叠加原理，将故障后的网络等效为正常状态网络和故障分量网络的叠加，然后以单相系统为例，以故障距离和非同步时间作为未知数，对正常电流电压相量和故障分量分别建立测距方程组，推导出故障距离的解析表达式，并给出了伪根的识别方法。

The POD PWM technique is applied to the topology and the control strategies of the new type of single-phase five-level CSI topology in open-loop control system and in closed-loop control system are discussed.

该拓扑结果简单，所用开关数目和分流电感比同类拓扑更少，针对该拓扑，应用多载波POD PWM技术应用，分别研究了开环和闭环控制方案。

The results show that all the samples are single phase with orthorhombic structure, and the grain size and its morphology have no obvious change before and after oxidation.

研究结果表明，所有样品在氧化前后均为单相正交结构，晶粒的大小和形貌在氧化前后无明显变化。

Three reference current detecting methods are presented for single-phase active power filter, i.e. fundamental current detecting method based on parallel resonance of passive LC filter, fundamental current detecting method based on switched-capacitor filter, harmonic current detecting method based on d-q transformation and its improved circuits.

同样通过采用并联变压器二次侧多补偿绕组的结构来提高有源电力滤波器的容量。4、提出三种单相有源电力滤波器指令电流的提取方法，即基于LC并联谐振的基波电流检测方法、基于开关电容滤波器的基波电流检测方法、基于单相d-q变换的谐波电流检测方法及其改进电路。

This paper studies the transient flow rule of single phase gas after the well is opened.

本文对开井后单相气体瞬变流动的规律进行研究。

The dissertation starts with the analysis of voltage-source rectifier. It is analyzed the steady state currents, voltages and their spectrums of uncont rolled single-phase voltage-source rectifier compensated by shunt APF based on piecewise linearization method.

本文以电容滤波型整流电路的分析作为切入点，基于"分段线性化"方法，对并联有源电力滤波器补偿电容滤波型整流负载进行了稳态分析，得到系统的电流和电压波形，进而获得其频谱特性。

Single phase La2Zr2O7 powders were synthesized by co-precipitation method using ammonia and oxalate ammonium as precipitant agent, respectively.

分别采用氨水和草酸铵作沉淀剂，通过化学共沉淀法制备了单相La2Zr2O7粉末。

Integrating C-type of traveling wave location method with AC signal injection method, a compositive location method for single-phase earth fault in 35kV distribution network is proposed, in which firstly the fault is presumedly located by C-type of traveling wave location method to preliminarily determine the position where fault occurs; then the fault is accurately located by AC signal injection method.

基于C型行波法和交流信号注入法提出35 kV配电网单相接地故障的综合定位方法：首先采用C型行波法进行初步定位，确定故障距离和故障所在区段，然后用交流信号注入法进行精确定位。

In a single-phase circuit, the power is of a pulsating nature.

在单相电路中，功率具有波动的本性。

The three-rotor single phase variable voltage and speed motor possess the advantages of simple control, low price, and a wide range of variable speed, particularly good condition for heat scatter in lower speed running.

三转子单相调压调速电动机具有控制简单、价格低廉、调速范围宽等优点，尤其在低速运行下有较好的散热条件。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。