采用多回路的分析方法,对建立在相坐标下的交流励磁发电机的动态性能进行了分析。
Using multi loop analysis method, the dynamic characteristics of ac excited generator are analyzed based on phase coordinate.
能耗制动是在异步电动机切离三相电源后,在定子回路通入直流电流,实现能耗制动。
The dynamic braking means that after three-phase voltage is switched off asynchronous dynamo the dc current flows into the stator circuit to realize dynamo braking.
对于现代电力电子装置的建模,本文提出了一种包含有TCR支路,SVC控制回路和滤波器支路的实用静止无功补偿器(svc)的动态相量模型。
As for the electronic device, the dissertation developed a new model of static var compensator (SVC), which includes TCR branch, SVC control circuit and filter branch.
并将结果与漂移模型计算结果进行比较,结果可为两相自然循环回路设计、运行提供参考。
Furthermore, the results based on different models are compared, which may provide some references for the practical design and operation of two phase natural circulation loop.
分析中考虑了定子电阻及换相期间反电势变化的影响,指出了忽略定子电阻后对分析的精确度带来的影响及主回路设计时所应注意到的一些问题。
The effects on accuracy of analysis and the problems that should be considered in the design of inverter circuit after neglecting the stator resistance are indicated.
差动保护电流回路接线是否正确,可通过相量分析法和带负荷检验法进行判断。
The wiring correctness of differential protection current loop can be verified using phasor analyzing method and on load testing method.
主要原因是锅炉安全阀二次保护回路设计有缺陷,再加上安全阀起跳和回座的整定值与运行额定值相重叠造成的。
The main reasons were due to the defect in the design of safety valve secondary circuit and the overlap of the service rating and the setting for safety valve popping and reseating.
为了对异步发电机十二相功率绕组带整流负载系统进行仿真计算,采用了基于电路拓扑理论的回路电流法。
By means of circuit topology theory and loop current method, simulation and calculation are performed on the 12-phase power winding of an induction generator with rectifier load system.
在自然循环水回路上进行了两相流密度波不稳定性的实验研究,得到了不同工况下的实时脉动曲线。
This paper describes the experimental study of two phase density wave oscillation in natural circulation loop. The oscillation curves under different conditions are obtained.
即使在稳态运行时,两相流体回路系统也经常会发生压力振荡现象。
Pressure Oscillation often occurs in two-phase system even if it operates in steady state.
提出一种以pic单片机为控制核心的三相异步电动机软起动控制器,阐述了该控制器的工作原理、回路结构图和软件程序结构。
A soft starting controller of the asynchronous mot or based upon PIC microprocessor is proposed and the operational principle of the controller, functional block diagram and flow chart are given.
主回路采用由18个晶闸管组成的三相零式电路,并辅以晶闸管的保护电路,通过控制可以得到低频正弦波的电压(电流)输出;
The main circuit is consisted of 18 thyristors circuit and protection circuit. With the help of control subsystem, it can get the output of low frequency voltage (current) with the shape of sine wave;
在水、空气实验回路上对水平管内气液两相泡状流的壁面切应力进口段进行了实验研究。
Experiments were carried out to investigate the developing length due to the wall shear stress in horizontal air water two phase bubbly flows.
在高压汽水回路上对垂直并联管中汽液两相流不稳定性进行了试验研究。
The steam-water two-phase flow instability in vertical parallel pipes was studied experimentally in the high pressure steam-water test loop.
通过工程实践对电压互感器二次回路核相试验进行分析。
Analysis the voltage mutual inductor second time circulation checking phase test during the project engineering.
差动保护电流回路接线是否正确,可通过相量分析法和带负荷测六角图检验法进行判断。简要介绍这两种方法,并介绍了利用潮流方向验证六角图的方法。
The wiring correctness of differential protection current loop can be verified by using phasor analyzing method and on load test method. These two methods were described.
因此,防止三相四线制配电回路断零事故的发生,具有更广泛的意义。
So, it is significant to prevent the occurrence of faulted neutral line within the circuit of three phase and four line system.
就三个变电所CVT故障或异常导致的二次回路电压出现了谐波、三相不平衡及暂态扰动等现象分别进行了分析。
The phenomenon of CVT faults resulting in secondary side voltage harmonics, voltage unbalance or transient disturbance was analyzed in this paper.
报导了在西安交通大学高压汽水实验回路上进行的垂直螺旋管内汽水两相流传热试验研究。
Extensive experiments of steam-water two-phase flow and boiling heat transfer in a vertical helically-coiled tube were carried out in high pressure water test loop of Xi an JiaotongUniversity.
合上电梯供电开关,再分步控制柜内各控制回路电开关。检查所有电源电压和相序(相序继电器)是否正确。
Turn on the power switch, then turn on the switches in controller. Check phase and voltage.
在焊接电源的充电回路中设计了三相桥式半控、恒流高效充电回路,取消了限流电阻;
A three phase half controlled bridge circuit with constant current and high efficiency is designed in the charged loop of the welding power supply. So a limiting current resistance is canceled.
简要介绍了三相感应调压器的负载运行情况,对二次回路参数、负载时一次回路参数、输入参数、相关数据和相量图进行了分析。
The load operation of a three-phase induction-voltage regulator is presented briefly. The related data, phasor drawing and parameters in secondary circuit, primary load circuit and imput are analyzed.
系统主回路含三相全波整流桥电路,三对IGBT功率管组成的逆变器电路,制动电路及保护电路等。
The main loop includes a three-phase bridge, an inverter module with three IGBT power tubes, a braking circuit and protecting circuits, etc.
电能由三相配电变压器经AC DC AC逆变电路输出传送到油管,经油管下部的油套管接触器连接到套管,形成一个完整的回路。
Electric power is output to the oil tube, which is connected with the bushing by the oil bushing connecter on the bottom of the oil tube, via a 3-phase transformer after AC-DC-AC inverse circuit.
液压气门辅助控制单元(12)可借助于一相对于内燃机(1)的主油回路(2)附加设置的辅助油回路(3)接通和切断。
The hydraulic valve auxiliary control unit (12) can be connected and cut off by means of an additional auxiliary oil circle (3) related to a main oil circle (2) of the internal combustion engine (1).
串联H桥多电平变频器的主回路从结构上可分为三相电容滤波不可控整流电路和单相电压型全桥逆变电路。
The series H-bridge multilevel converter's power circuit is composed of uncontrolled rectifier with filtering capacitor and single phase H-bridge voltage-type inverter.
文中以铝硅合金中的富铁相杂质颗粒为分离对象,利用流动试验研究了磁感应强度、分离通道截面形状和金属熔体回路尺寸对分离效率的影响。
Study is made on the influence of electromagnetic field on iron-rich phase of the Al-Si alloy with Mn as de-ironing additive.
文中以铝硅合金中的富铁相杂质颗粒为分离对象,利用流动试验研究了磁感应强度、分离通道截面形状和金属熔体回路尺寸对分离效率的影响。
Study is made on the influence of electromagnetic field on iron-rich phase of the Al-Si alloy with Mn as de-ironing additive.
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