开关电源的有源功率因数校正电路设计

有源功率因数校正可减少用电设备对电网的谐波污染,提高电器设备输入端的功率因数。详细分析了有源功率因数校正APFC(active power factor corrector)原理,采用平均电流控制模式控制原理,设计了基于UC3854BN芯片的一种有源功率因数校正电路方案,着重分析了电路主要参数的选择和设计。实践证明,采用APFC后,大大减小了输入电流的谐波分量,实现了功率因数校正。     

单相有源功率因数校正电路的设计与仿真研究

论述了单相功率因数校正(APFC)的原理和方法,通过采用Boost型DC-DC变换器作为功率级,UC3854芯片控制PWM的占空比,并直接驱动MOSFET,使输入电流跟踪输入电压,以提高功率因数。根据设计目标要求对1.2kW平均电流控制的单相Boost功率因数校正电路的主电路及UC3854外围电路参数进行了设计和计算,使功率因数达到了0.9984,并在Orcad环境下进行仿真研究,取得了理想的效果。文中的设计方法和思路对于中小功率直流电源的APFC设计具有一定的借鉴作用。     

开关电源功率因数校正技术的比较分析

本文介绍了开关电源功率因数校正的基本原理,剖析了有源功率因数校正电路的结构、原理,对比各类APFC的特点,并概括了有源功率因数校正技术的发展方向.     

功率因数校正技术及不同控制策略研究

功率因数校正电路广泛应用于交-直电源变换电路中,以消除电力系统的谐波,提高功率因数。为此,对典型的有源PFC的Boost电路进行原理性分析,并对有源功率因数校正的各种控制方法从不同角度进行分析和比较,如连续导通模式、不连续导通模式和临界导通模式,平均电流模式、电流峰值模式和电流滞环控制等。最后以L6561为例说明各种功率因数控制方法不是独立而是相互联系的,实际应用中应该结合考虑各方面具体情况来进行选择。     

有源功率因数校正技术综述

叙述了有源功率因数校正方法分类及其基本工作原理，并分析了各自的优缺点。最后概括了有源功率因数校正技术的发展趋势。     

采用UC3854的有源功率因数校正电路

主要介绍有源功率因数校正电路分类,并对广泛应用的UC3854集成电路的典型应用电路做了分析.     

有源功率因数校正APFC

从功率因数定义入手，分析不良功率因数的来源，介绍改善开关整流器功率因数的措施，说述有源功率因数校正电路ＡＰＦＣ及功率因数校正器ＵＣ３８５４。     

基于TOPSwitch-GX器件的新型有源功率因数校正技术

文中分析了功率因数校正的原理，阐述了最新的TOPSwitch-GX器件在APFC中的应用．给出了计算方法，原理图和一个算例。指出基于TOPSwitch-GX器件Boost拓扑结构的APFC技术是提高中小功率电器功率因数的较好解决方案之一．     

Improved control strategy on single-phase buck-type power factor correction converter

A buck-type power factor correction (PFC) converter is not only effectively capable of eliminating utility input current harmonics; its related characteristics also include high efficiency, absence of inrush current, capability of obtaining low dc output voltage, ability to protect against short circuit, and so forth. On the other hand, because this type of rectifier must employ inductors design for high inductance, the buck-type PFC converter tends to increase the volumetric size and weight, and this has prevented its widespread use. This paper presents a new control strategy for this type of converter which can reduce the size and weight of the inductor and also eliminate the ripple components included in the output voltage waveform. The operating principle, simulation and experimental results obtained by a prototype rectifier are described.     

无桥有源PFC的理论与数字控制技术研究

文中研究一种无桥PFC电路,采用数字控制技术,相比于传统模拟控制的PFC电路,具有结构简单、温飘小、能实现复杂控制算法等优点。详细介绍了无桥PFC的工作原理、数字控制策略及采样方式。最后用Simulink仿真验证理论分析的正确性;并搭建了一台300W实验样机,验证了实践中的可行性。     

Single current sensor control for single-phase active power factor correction

This paper presents the realization of a boost-type active power factor corrector (APFC) using a single current sensor to sense the inductor current for input current shaping and output voltage regulation. Neither input voltage nor output voltage sensing is needed. The sensed inductor current is used for two main functions. The first one is for comparing with a sawtooth signal in order to shape the input current waveform. The second one is for determining the input and output voltages by processing the rate of change of the inductor current when the main switch is in on and off states, respectively. Compared with conventional APFCs, the proposed technique has several advantages. First, no dissipative voltage divider is required. Second, electrical isolation between the power conversion stage and the control stage can be achieved inherently. Finally, no complicated or sophisticated digital sampling and numerical computations are needed. The applicability and accuracy of the proposed technique have been studied experimentally. Steady-state behavior and large-signal response under output load disturbance are also investigated.     

基于BCM的有源功率因数校正电路的实现

分析整流电路的拓扑结构和工作模式,探讨该整流因数校正Boost开关变换器的设计方法.仿真结果表明,所设计的以MC33262为核心的临界导电模式有源功率因数校正(APFC)电路能在90～270 V的宽电压输入范围内输出稳定的400 V直流电压,并使得功率因数达0.99,系统性能优越,达到设计要求.     

A digital power factor correction (PFC) control strategy optimized for DSP

A predictive algorithm for digital control power factor correction (PFC) is presented in this paper. Based on this algorithm, all of the duty cycles required to achieve unity power factor in one half line period are calculated in advance by digital signal processors (DSP). A boost converter controlled by these precalculated duty cycles can achieve sinusoidal current waveform. One main advantage is that the digital control PFC implementation based on this control strategy can operate at a high switching frequency which is not directly dependent on the processing speed of DSP. Input voltage feed-forward compensation makes the output voltage insensitive to the input voltage variation and guarantees sinusoidal input current even if the input voltage is distorted. A prototype of boost PFC controlled by a DSP evaluation board was set up to implement the proposed predictive control strategy. Both the simulation and experimental results show that the proposed predictive strategy for PFC achieves near unity power factor.     

基于BCM的有源功率因数校正电路的实现

分析整流电路的拓扑结构和工作模式,探讨该整流电路关键参数的选取依据,提出临界导电模式（BCM）功率因数校正Boost开关变换器的设计方法。仿真结果表明．所设计的以MC33262为核心的临界导电模式有源功率因数校正（APFC）电路能在90～270V的宽电压输入范围内输出稳定的400V直流电压,并使得功率因数达0．99,系统性能优越．达到设计要求。     

2 kW有源功率因数校正电路设计

有源功率因数校正可减少用电设备对电网的谐波污染,提高电器设备输入端的功率因数.详细分析有源功率因数校正APFC(active power factor corrector)原理,采用平均电流控制模式控制原理,设计一种2 kW有源功率因数校正电路.实验结果表明:以TDA16888为核心的有源功率因数校正器能在90～270V的宽电压输入范围内得到稳定的380V直流电压输出,功率因数达0.99,系统性能优越.     

2kW有源功率因数校正电路设计

有源功率因数校正可减少用电设备对电网的谐波污染,提高电器设备输入端的功率因数。详细分析有源功率因数校正APFC(active power factor corrector)原理,采用平均电流控制模式控制原理,设计一种2 kW有源功率因数校正电路。实验结果表明:以TDA16888为核心的有源功率因数校正器能在90～270 V的宽电压输入范围内得到稳定的380 V直流电压输出,功率因数达0.99,系统性能优越。     

An active power factor correction technique for three-phase dioderectifiers

A novel active power factor correction method for power supplies with three-phase front-end diode rectifiers is proposed and analyzed. The implementation of this method requires the use of an additional single switch boost chopper. The combined front-end converter draws sinusoidal AC currents from the AC source with nearly unity input power factor while operating at a fixed switching frequency. It is shown that when the active input power factor correction stage is also used to regulate the converter DC bus voltage, the converter performance can improve substantially in comparison with the conventional three-phase AC-to-DC converters. These improvements include component count reduction, simplified input synchronization logic requirements, and smaller filter refractive components. Theoretical results are verified experimentally. The proposed method has the disadvantage of substantially increasing the current stresses of the switching devices and the high-frequency ripple content of the prefiltered AC input currents