In this paper has analysed high levels of harmonic currents and low Power factor of electronic ballast by circuit study.
通过电路分析对电子镇流器存在的电源电流谐波高和功率因数低等问题。
It has evident effect on low power factor working of motor, decreasing line loss and improving load ability of transformer.
实行电动机无功就地补偿，对改变电动机低功率因数运行、减少线路损耗、提高变压器带载能力，有明显效果。
AC/DC switching converters are highly nonlinear. Therefore they draw a non-sinusoidal current with a very low power factor.
DC开关变换器非线性程度很高，输入电流为非正弦形式，功率因数极低。
In the no-load test of transformer, because of the low power factor and non-sinusoid current waveform, the high precision measurement is difficult.
变压器的空载试验中，由于功率因数低，空载电流不是正弦信号，高精度测量其有功功率具有一定的难度。
Many load in distribution network has low power factor, fluctuates greatly, and changes fleetly. It is hard to achieve perfect compensation by traditional compensator.
配电网中许多负荷功率因数低、波动大、变化快，传统的无功功率补偿装置很难起到理想的补偿效果。
Traditional ballast components of inductance ballast has some disadvantages which include large volume, high self consumption, low power factor and difficult to adjust.
传统的高压钠灯配备的是电感式镇流器，其体积大，本身功耗大、功率因数低、调光困难等。
In the light of low power factor of the former power supply system of Majishan Port, Bao Steel, a new calculation method for wattless compensation capacity is put forward.
针对宝钢马迹山港原供电系统功率因数低下的问题，提出了一种新的无功补偿容量计算方法。
Thyristor cascade control system is a low-cost system, but the traditional cascade control system has some shortages, such as a low power factor, serious harmonic pollution etc.
晶闸管串级调速系统是一种廉价、简易的调速系统，但是传统串调系统存在着诸如功率因数低、谐波污染严重等弊端。
Speed regulation system using cascade control method with thyristor is a low-cost system, but the classic system has some shortages, such as low power factor, serious harmonic pollution and etc.
晶闸管串级调速系统是一种廉价、简易的调速系统，但是传统串调系统存在着诸如功率因数低、谐波污染严重等弊端。
It is pointed out that the power factor requirement for users is too low and should be raised.
文中认为，目前对电力用户功率因数的要求偏低，建议提高。
It can achieve unity power factor and low current distortion.
它可以实现单位功率因数和低电流畸变。
High power factor, high efficiency, low noise, is the character that power supply and electronic equipment pursuing.
高功率因数、高效率、低噪音是电源装置和用电设备普遍追求的品质。
It adopts bidirectional switch and on time rectification, and obtains high power factor, high efficiency and low THD.
它采用双向开关和同期整流，得到了高功率因子、高效率和低高次谐波。
Two circuits, characterized by high Power Factor and low output voltage, are proposed.
这两种电路都具有功率因数高、输出电压较低等特点。
The power factor for the railway substation of the electrified railway is low and can not meet the conditions of severe tractive load to reactive compensation requirements.
针对电气化铁路变电所功率因数低，不能满足剧烈变化的牵引负荷对无功补偿要求的现状。
A novel low conduction loss circuit that can be used for power factor correction is presented in this paper.
本文给出了一种可用于功率因数校正的新型低通态损耗电路。
The experiment results indicate the system has the characteristics of high power factor and low harmonic current.
实验结果表明，该系统具有输出功率因数高，对电网谐波污染小等优点。
Simulation and experimental results show that the proposed converter has sine wave input current and output voltage, low harmonic content, adjustable power factor, and zero voltage commutation.
仿真和实验结果表明：所提出的变换器输入电流和输出电压为正弦，谐波小且输入功率因数可控，并可实现零电压换流。
Experiment results showed that the correction device of power factor could realize high power factor, low harmonic distortion and low ripple of output voltage.
通过实验结果表明，单级功率因数校正装置可以实现较高的功率因数、较低的总谐波畸变，而且输出电压纹波小。
The saving energy control system is proposed for problem of oil drawing machine electric driver which efficiency and power factor is low.
针对抽油机电驱动装置效率和功率因数低、耗能严重的问题，研制了一台新型的抽油机节能控制系统。
This paper improved the harmonic current detection method based on UPF (unity power factor), using the slipped window integral to replace the LPF (low pass filter).
本文对基于单位功率因数的谐波电流检测方法进行了改进，用移动窗积分法取代检测中常用的低通滤波器。
Meanwhile extinction ratio of converted signal can be improved with low probe power, short probe wavelength, long cavity length, high confinement factor, and large biased current.
减小探测光输入功率，选取短波长探测光波长，增加半导体光放大器的腔长和模场限制因子以及大的偏置电流可提高转换光消光比；
Experiment result showed, the topology can make the device get to high Power Factor (PF), low Total Harmonic Distortion (THD) of input current, low ripple of output voltage, and high efficiency.
实验结果表明，应用该电路拓扑的实验装置，其功率因数较高，输入电流的总谐波畸变较低，输出电压纹波小，而且整个装置的效率也比较高。
This paper attempts to design a novel switching power supply with high power factor, high efficiency and low cost performance, to providing the power supply to LCD TV of 32 inch.
本文设计出一款高功率因数、高效率、低性能-价格比的开关电源，为32寸LCD电视作稳压电源用。
The reason is investigated that the power factor large power controlled rectifier's of the aluminum company is low .
研究了电解铝厂大功率可控整流系统功率因数低下的原因，分析了这种整流机组网侧谐波电流和基波感性电流。
The experiment result shows that the adapter owns the advantages of high efficiency, high power factor, and low cost.
实验结果表明此类适配器具有高效率、高功率因数、及低成本等优点。
Test results demonstrated that the converter has the advantages of simple topology, high power density, high conversion efficiency, high power factor, uninterruptible power supply, low cost.
试验结果表明，这种变换器具有电路拓扑简单、功率密度高、变换效率高、功率因数高、不间断供电、成本低等优点。
The motor has characteristics of placid rotation, high power factor and low noise.
该电动机具有转动平稳、功率因数高、噪声低等特点。
Under condition of no power factor regulator, it can generate high power factor and low harmonic rate.
这种镇流器在没有功率因数调节器的情况下能产生高功率因数和低谐波率。
Under condition of no power factor regulator, it can generate high power factor and low harmonic rate.
这种镇流器在没有功率因数调节器的情况下能产生高功率因数和低谐波率。
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