可实现电机输入电源功率因数的改善，减轻其容量。
It can obtain the improve of power factor of the input motor power, and can lighten its capacity.
介绍了一种借助单片机和PC机构成的开关电源功率因数分析系统。
A measuring and analysing system for power factor of switching power supply, based on MCS 51 and PC, is discussed.
分析了该电路的基本工作原理、关键参数的设计计算，仿真结果表明这种新型的单级大功率开关电源功率因数可达到0 . 995。
Moreover, its operation process principles and critical parameters are analyzed, its simulation results proved that the novel single stage high power switch source's power factor can achieve 0.995.
构造基于反激拓扑的单级高功率因数的大功率电源的前提是弄清变压器的储能和释放规律。
The precondition of constructing single-stage high power factor high power supply based on flyback topology is that the release rule of transformer energy-storage is clear.
通过主回路、引弧电路、稳弧电路的共同作用，解决了一般弧焊电源输出脉动大、功率因数低的缺点。
The problem of annual arc welding power source whose output is surge and power factor is lower, is solved by means of main circuit, arc ignition circuit and arc static circuit working together.
在单位功率因数整流器中，利用瞬时值比较法来控制电源电流，不但控制简单，还可有效限制器件的最高开关频率。
The method of instantaneous value comparison for source current control of unity power factor rectifier possesses advantages of simplicity as well as valid restriction for maximum switching frequency.
提出了一种基于临界电流模式的峰值电流控制技术来实现开关电源的功率因数校正任务。
A critical current mode based on the peak current control technology to achieve switching power supply power factor correction task is proposed.
通过优化参数设置，可以使弧焊逆变电源的功率因数提高到95%，电流谐波畸变率低到30%。
Through the parameters optimization, the power factor (PF) can be increased to95%and Total Harmonics Distortion (THD) can be decreased to below30%.
对已建成的功率因数偏低的泵站采用电力电容补偿，可减少电源和线路的电流负荷。
If we compensate the pump station with lower power Numbers for electric power and electric capacity we can reduce the current load in the power source and the lines.
为了抑制谐波污染，改善电网品质，目前多在电源前级加入功率因数校正环节。
In order to restrain harmonic pollution and improve power system quality, power factor correction (PFC) circuit is applied in pre-stage of power supply.
对于两路电源供电给同一用户的情况，目前现场通用的功率因数调整电费有两种计算方法。
In the case of double-source supply to a consumer, there are two kinds of currently prevalent calculation method for tariff regulation by power factors at site.
功率因数校正(PFC)是电源设计中的关键内容之一。
本文讨论了脉宽调制(PWM)逆变式弧焊电源的功率因数。
The power factor of PWM are welding power source has been discussed in this paper.
提出了一类新颖的不间断高功率因数交流开关电源电路结构与拓扑族。
Novel circuit structure and topologies family of uninterruptible AC switching power supplies with high power factor are proposed.
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。
In this paper has analysed high levels of harmonic currents and low Power factor of electronic ballast by circuit study.
介绍了一种采用无源功率因数校正方法降低电源谐波含量的方案。
A proposal using passive power factor correction method to reduce harmonics emission is introduced in this paper.
新型开关电源从网侧接入点获得单位功率因数。
A new type of switching power supply realize of the unity power factor from the network access point adjacent.
基于电流和电压的双环控制策略，研制了一台输出功率300w的功率因数校正电源样机。
A 300w experimental prototype of power supply with power-factor-correction function based on dual-loop control strategy is presented in this paper.
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。
High power factor, high efficiency, low noise, is the character that power supply and electronic equipment pursuing.
因此，高功率因数的大功率开关电源成为研究的热门。
Therefore, the high power factor high-power Switching-Mode power supply becomes the major topic of discussion studying.
近年来，以软开关为特征的逆变电阻焊电源更是以其体积小、重量轻、开关损耗少、功率因数高而备受重视。
In the past years, Inverter resistance welding power source with soft-switching technology has smaller volume, lower quality, higher efficiency.
该文提出了一类基于反激变换器的单级不间断高功率因数直流开关电源电路结构与拓扑族。
Novel circuit structure and topologies of single-stage DC switching power supplies with uninterruptible power supply and high power factor, based on flyback converter, are proposed.
本文设计了一种适用于中大功率、便携式逆变焊机，具有电源输入侧功率因数高，主功率器件实现软开关等特点。
In this paper, a multifunctional welding machine is designed with the characters of high power factor, soft switching and portable remove.
实验表明，作为双馈感应发电机转子励磁电源的三相pwm变换器具有功率因数高、网侧电流谐波小、能量双向流等优点。
Experimental results show that three-phase PWM converters are advantageous in high power factor, small input-line current harmonic distortion and bi-directional power flow.
为提高逆变电源的功率因数，必须采用谐波抑制技术降低输入电流的谐波畸变率。
To increase power factor, the current distortion can be reduced by harmonic suppression technology.
整个电源由输入电路、功率因数校正器、主逆变器、输出滤波电路、辅助电源、均流电路等部分组成。
The system consists of the AC input stage, single phase PFC, main inverter, output low-pass filter, auxiliary power supply, and load current sharing circuit, etc.
对该功率因数校正电路进行了分析和设计，试验结果表明，该直流电源电路达到了很高的功率因数。
This paper analyse and design the boost PFC, the experiment result show that DC circuit attain high high power factor.
对该功率因数校正电路进行了分析和设计，试验结果表明，该直流电源电路达到了很高的功率因数。
This paper analyse and design the boost PFC, the experiment result show that DC circuit attain high high power factor.
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