Search query: PFC input current

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abstract: This paper presents a new current control method for dual boost single phase power factor correction (PFC) converters. A dual boost PFC converter is more efficient than the conventional boost PFC converter by virtue of the elimination of one semiconductor device in the main current path, but is more difficult to control using the existing PFC control method due to the need to sense ac input current and voltage. The proposed current control method is based on sensing of the dc output current, which can be easily accomplished by using a sensing resistor inserted on the negative rail of the dc output. A new pulsewidth modulation based multiplier circuit is also developed as a more robust and cost effective alternative to linear analog multiplier design or mixed signal implementation. Control characteristics and performance of the new method are analyzed using averaged models and verified by measurement results from a 500 W prototype. Operation of the converter with both 60 and 400 Hz line is reported to demonstrate its performance for both terrestrial and airborne applications. Conducted electromagnetic interference measurements of the converter are also presented.
author_names: Tao Qi

Lei Xing

Jian Sun
title: Dual Boost Single Phase PFC Input Current Control Based on Output Current Sensing
venue: IEEE Transactions on Power Electronics
year: 2009

abstract: This paper establishes the generalized explicit expression of variable on time (VOT) for CRM boost PFC converters to eliminate the effect of actual resonant processes. In order to minimize the effect of input filter capacitor (IFC) in medium line frequency, the compensation for the phase leading input current (PLIC) can also be implemented using proposed VOT expression. Due to the crossover distortion of the rectified input voltage, different sampling positions of input voltage result in different dead angle and different input current spine. Then this paper selects sampling before the rectifier bridge to reduce the input current THD and a varying parameter control to suppress the input current spine. The experimental results from a 400Hz/115VAC 160W/270VDC CRM boost PFC prototype are presented to verify the effectiveness and advantages of the proposed VOT control.
author_names: Yuting Zhou

Xiaoyong Ren

Zhehui Guo

Yu Wu

Zhiliang Zhang

Qianhong Chen
title: Variable On time (VOT) Control with Phase Leading Input Current (PLIC) Compensation for 400Hz CRM Boost PFC Converters
venue: 2019 IEEE Applied Power Electronics Conference and Exposition (APEC)
year: 2019

abstract: The bridgeless buck power factor correction (PFC) converters feature the merits of low output voltage and high efficiency while their inherent dead angles in the input current will deteriorate the input current harmonics and power factor (PF) Aiming to reduce the dead angles, a new bridgeless buck PFC converter is proposed in this paper. Through integrating the main buck circuit and the auxiliary flyback circuit with one magnetic core, the dead angles in the input current of the proposed bridgeless buck PFC converter is eliminated so that the PF and input current harmonics are improved. The proposed bridgeless buck PFC converter is designed to operate in discontinuous conduction mode (DCM) with the merits of simple controller and nature current shaping ability. A new logic control circuit is provided. The detailed theoretical derivations and design consideration are presented. The experimental comparison among the proposed bridgeless buck PFC converter, the conventional buck PFC converter, and the conventional bridgeless buck PFC converter is displayed to validate the effectiveness of the new converter.
author_names: Xiang Lin

Faqiang Wang
title: New Bridgeless Buck PFC Converter with Improved Input Current and Power Factor
venue: IEEE Transactions on Industrial Electronics
year: 2018

abstract: A series pass module (SPM) for shaping the input current waveform of flyback power factor corrector (PFC) to be in the same phase and waveshape as the supply voltage is presented. The amplitude of the input current is also controlled to regulate the output voltage of the PFC. The SPM is composed of a high voltage and a low voltage power devices in cascode configuration. The high voltage device, which has low on state resistance, is used to share dominant voltage stress while the low voltage device, which has a high output impedance, is used to profile the current through the SPM. The maximum voltage across the low voltage device is clamped. Such configuration can make the input current exhibit lower total harmonic distortion (THD) than that with a single series pass device (SPD) In order to minimize the power dissipation of the module, the low voltage device is operated around the knee point of the voltage current characteristics. A 100W, 85 265Vac 36Vdc prototype with the proposed SPM has been built and evaluated.
author_names: Chung-Pui Tung

Ke-Wei Wang

Ka-Wai Ho

Jeff P W Chow

John Wing-to Fan

Wan-Tim Chan

Henry Shu-hung Chung
title: Flyback PFC with a Series Pass Module in Cascode Structure for Input Current Shaping
venue: 2018 IEEE Energy Conversion Congress and Exposition (ECCE)
year: 2018

abstract: As time progresses and technology develops in recent years, the demand for networking communication products is on the increase. Almost all nations throughout the world adopt AC power transmission system. To avoid current phase shift or distortion that would indirectly influence energy conversion performance and power quality in the AC DC conversion process, it's important to insert PFC into power supplies. A PFC is to change the waveform of current drawn by a load to improve the power factor, reduce input current spike and control the harmonic current. This proposal aimed to design and implement a high efficiency, high power factor, high power density and low input current harmonic PFC. Due to the fast switching property of Wide Bandgap (WBG) Power Semiconductor Devices, it can reduce the loss and improve conversion efficiency, therefore increase the total power density.
author_names: Yong-Long Syu

Yu-Chen Liu

Ming-Cheng Chen

Yao-Ching Hsieh

Sheng-Yuan Ou

Huang-Jen Chiu
title: High efficiency and low input current distortion Totem Pole Bridgeless PFC
venue: 2016 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)
year: 2016

abstract: This paper proposes a novel single switch quasi active power factor correction (PFC) converter based on two flyback dc/dc modules. To achieve a high efficiency, part of the input power is directly transferred to the load by the first dc/dc module. The rest of the input power is stored in the dc bus capacitor and reprocessed by the second dc/dc module. Together, the dc bus capacitor and the second dc/dc module also serve as a regenerative snubber. Furthermore, a quasi active PFC circuit is provided to improve the power factor and to ensure the continuous current mode (CCM) operation of the input inductor without the need for sophisticated feedforward sensing and control mechanism. The quasi active PFC circuit is driven by a magnetic switch, through the tertiary winding of the transformer of the first flyback module. The input current harmonics of the proposed converter meet the IEC 61000 3 2 (Classes A, C, and D) requirements. The dc bus capacitor voltage is always less than the input voltage regardless of the load condition and is fairly invariant to large variations of the input voltages. High power factor with CCM operation and fast output voltage regulation have been achieved through a single loop controller. Operating principles, analysis, and experimental results are presented to verify the effectiveness of the proposed converter.
author_names: Hussain S Athab

Dylan Dah-Chuan Lu

Amirnaser Yazdani

Bin Wu
title: An Efficient Single Switch Quasi Active PFC Converter With Continuous Input Current and Low DC Bus Voltage Stress
venue: IEEE Transactions on Industrial Electronics
year: 2014

abstract: In this work, analysis and optimization of sliding mode controller parameters are treated, in order to govern a static power converter. In this case, an ac dc boost power factor corrector is used; generally, these kinds of converters are applied to obtain a power factor near to unity. Advantage that the designed controller can give is the improvement of dynamic and static performances in cases of large disturbances. Simple sliding surface contains, in most cases, only one variable; in this study, analyzed surface includes two variables, which are continuous output voltage and rectified sinusoidal input current; the benefit of this surface is getting react against various disturbances, as be at the input power parameters, or the value of the load. The whole controller and converter is tested by simulation and experimentally for steady state and transient responses.
author_names: Abdelhalim Kessal

Lazhar Rahmani
title: Ga Optimized Parameters of Sliding Mode Controller Based on Both Output voltage and Input Current With an Application in the PFC of AC/DC Converters
venue: IEEE Transactions on Power Electronics
year: 2014

abstract: This article presents a comparative analysis of the input current parameters for active power factor corrector (PFC) based on conventional boost converter (BC) and zero current switching quasi resonant boost converter (ZCS QRBC) The comparison was performed taking into account the spectral composition of the input current (individual harmonic levels, total harmonic distortion) and power factor. It has been shown that both converters rated for 1 kW output power are compliant with the requirements of international standard IEC61000 3 2.
author_names: Yuriy Denisov

Serhii Stepenko

Alexey N Gorodny

Andrii O Kravchenko
title: Input current parameters analysis for PFC based on quasi resonant and conventional boost converters
venue: 2014 IEEE 34th International Scientific Conference on Electronics and Nanotechnology (ELNANO)
year: 2014

abstract: This paper presents an interleaved totem pole bridgeless power factor correction (PFC) rectifier which consists of a coupled inductor and two interleaved bridge arms. The core utilization and power density are improved with the use of coupled inductor. However, it also introduces a serious diode reverse recovery problem and increases the turn on loss obviously due to the poor parasitic body diode of MOSFET. In order to solve the problem, a new control method is proposed and zero voltage switching (ZVS) is achieved for all of the MOSFETs. In addition, the input current ripple is reduced further since a half of the output voltage is produced, which makes the voltage across the input inductor present three level characteristic. Because of these merits, high efficiency can be realized under heavy load and volume of electro magnetic interference (EMI) filters can be reduced. The operating principle of the proposed method is described in detail and the parameters designing is provided. Finally, a 500W laboratory prototype is constructed and used to verify the feasibility of the proposed control method.
author_names: Long Huang

Wenxi Yao

Zhengyu Lu
title: Interleaved totem pole bridgeless PFC rectifier with ZVS and low input current ripple
venue: 2015 IEEE Energy Conversion Congress and Exposition (ECCE)
year: 2015

abstract: This paper aims to study the power factor (PF) correction scheme for a single phase on board charger of electric vehicles. The topology is based on a unidirectional current source active rectifier (CSAR) consisting of four insulated gate bipolar transistors in series with four diodes followed by a boost converter. Buck type rectifiers inject low order input current harmonics into the ac mains. Thus, an inductor capacitor (LC) input filter is employed. The capacitor's reactive energy results in a leading grid current. In order to achieve a unity displacement power factor, a phase shift control is implemented. However, the LC filter is prone to series and parallel resonances coming from the grid disturbances and the converter harmonics, respectively. Therefore, the phase shift control strategy combined with the topology of the CSAR results in a periodical resonance of the input filter. This phenomenon is studied in detail. In order to reduce the grid current's distortion level, an active damping control with resonance frequency tracking that achieves a good PF while meeting the IEC's international standards on harmonic current emissions is presented. An experimental test bench is developed to validate the simulations' theoretical findings. Compliance with the standards is achieved and system limitations are discussed.
author_names: Christelle Saber

Denis Labrousse

Bertrand Revol

Alain Gascher
title: Challenges Facing PFC of a Single Phase On Board Charger for Electric Vehicles Based on a Current Source Active Rectifier Input Stage
venue: IEEE Transactions on Power Electronics
year: 2016