Principle and class of active power factor correction(APFC) are introduced.
主要介绍了有源功率因数校正（APFC）的工作原理、电路分类。
An APFC control solution for high power variable frequency air conditioner is introduced.
本文介绍了较大功率变频空调的一种APFC方案。
An effective way for research of PFC is given by the development of APFC software package.
该软件包的开发，为研究APFC算法提供了一条有效的途径。
The characteristic and selection of inductance material for use in PPFC and APFC are introduced.
介绍用于无源和有源功率因数校正中电感材料的特性和选择。
With the higher quality requirement of electrical equipment, APFC technique has been widely applied.
随着对用电设备性能指标要求的不断提高，这一技术得到了广泛的实际应用。
It theoretically analyzed and studied a simple DC voltage sensorless single APFC converter by detecting an AC line voltage in the paper.
文章对一种只检测交流输入电压而不需要检测输出直流电压的简化单相pfc变换器进行了理论分析和研究。
The active power factor correction(APFC) technology is introduced into the DC energy storage unit ofUPQC for capacitive voltage control.
将有源功率因数校正技术引入UPQC直流储能单元的电压控制。
When powder core is used to preparation of APFC inductor, lower core loss will be obtained as long as core sizes and coil turns are properly selected.
用来制作APFC电感，只要恰当选择磁心尺寸和线圈匝数就能取得降低磁心损耗的效果。
An APFC circuit based on average current mode control is designed and tested. It is indicated that the average current mode control has many advantages.
用平均电流型控制原理设计一个APFC电路，并进行了实际测试，证明该平均电流型控制的优越性。
Passive Power factor correction circuit, two-stage and single-stage APFC circuits are researched, which applications are given by comparison of their performance.
对无源pfc电路、有源两级PF c电路和有源单级PF C电路进行了分析及性能比较，指出它们分别适用的场合。
The operation principle of APFC circuit is analysed, the design method of the key circuit parameter is particularly introduced, and a design example is also given.
分析了有源功率因数校正电路的工作原理，详细介绍了关键电路参数设计方法，并给出了设计实例。
To enhance the performance of UPQC, active power factor correction (APFC) technology is introduced into the DC energy storage unit of UPQC for capacitive voltage control.
为了进一步提高UPQC的性能，将有源功率因数校正(APFC)技术引入UPQC直流储能单元的直流电容电压控制，详细阐述了其工作原理，并给出了仿真实验结果。
On account of the average current control chosen in the APFC system, a large signal dynamic BUCBB model is built and all the switching elements replaced by dependent sources.
由于变换器工作在平均电流控制的APFC系统中，本文建立了BUCBB变换器的大信号动态模型，并将BUCBB变换器中的开关元件用受控源代替。
This paper introduces the principle of active power factor correction (APFC), circuit-topology, control strategy and soft-switching technology, and predicts the tendency of APFC.
综述了APFC技术的基本原理，拓朴电路，控制策略及软开关技术，并预测了其发展趋势。
This paper based on analyzing the X-Ray tube designs the switching power supply circuit, analyzes the principle of APFC, LCC half bridge resonance convertor and dual rectifier circuit.
本文在分析X射线管外特性的基础上，设计制作了开关电源功率主电路，分析了有源功率因数校正器原理、LCC半桥谐振变换器原理及倍压整流电路原理。
The Power Factor of electronic devices is a main index to judging their performance, while Active Power Factor Correction (APFC) is a radical and effective approach to improve Power Factor.
用电设备的功率因数是衡量其性能的一项重要指标，而提高功率因数的最根本和有效的途径就是采用有源功率因数校正技术。
The self-adaptable control of output voltage could be realized under certain range by adding a APFC in ultrasonic generator and adjusting voltage feedback network with digital potentiometers.
本文在超声发生器中加入功率因数校正电路（APFC），并利用单片机控制数字电位器实现了对电压反馈网络的调节，从而实现APFC输出电压在一定范围内的自适应控制。
The self-adaptable control of output voltage could be realized under certain range by adding a APFC in ultrasonic generator and adjusting voltage feedback network with digital potentiometers.
本文在超声发生器中加入功率因数校正电路（APFC），并利用单片机控制数字电位器实现了对电压反馈网络的调节，从而实现APFC输出电压在一定范围内的自适应控制。
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