Bridgeless SEPIC PFC Rectifier With Reduced Components and Conduction Losses

Mahdavi, Mohammad; Farzanehfard, Hosein

doi:10.1109/tie.2010.2095393

Cited by 243 publications

(103 citation statements)

References 19 publications

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“…Increasing current increases stresses on switching devices, diode reverse recovery current and parasitic resonance currents become greater than the main switch can handle, and the size of the boost inductor should be increased to avoid saturation and overheating problems. The component stresses can be reduced by controlling the turn off rate of the boost diode current by implementing passive or active snubber [4] circuits and the power level can be slightly advanced, but in order to advance the power level significantly the methods including device paralleling, module paralleling, power stage paralleling, and interleaving are widely utilized.…”

Section: Advancing Power Rating Of Pfc Convertermentioning

confidence: 99%

Interleaved Sepic Converters for AC-DC Front-End Converter Application

2016

3rd International Conference on Innovative Engineering Technologies (ICIET'2016) August 5-6, 2016 Bangkok (Thailand)

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Abstract-In ac/dc power factor correction (PFC) applications, where a wide range dc link voltage is required, boost derived topologies are no longer the most suitable circuit topologies for universal grids. In this paper an interleaved SEPIC converter, capable of providing a wide range dc link voltage is investigated. The interleaved converter is able to process more power with reduced circuit ripples and harmonics distortion, and current stresses. Additionally, because the coupled inductors share a common magnetic core, the count of magnetic devices is kept the same as the single-phase topology. Moreover, using coupled inductors effectively solves the current sharing problems caused by the duty cycle mismatch. The phase of the gate signals among different phases can be artificially shifted by a certain degree which would contribute to reduce the circuit harmonics as well as the current ripples.

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Section: Advancing Power Rating Of Pfc Convertermentioning

confidence: 99%

Interleaved Sepic Converters for AC-DC Front-End Converter Application

2016

3rd International Conference on Innovative Engineering Technologies (ICIET'2016) August 5-6, 2016 Bangkok (Thailand)

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“…In order to overcome most of these problems, bridgeless SEPIC PFC topology with reduced component count has been introduced in [5]. But this topology is still suffers from having at least two semiconductors in the current conduction path during each switching cycle.…”

Section: Iilitearture Surveymentioning

confidence: 99%

Analysis of Bridgeless PFC Rectifier using MATLAB-SIMULINK

akumar¹

2015

IJAREEIE

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This paper analyses a bridgeless PFC converter using MATLAB-SIMULINK . The PFC Converter used in this paper works on discontinuous mode, active power factor correction (PFC) techniques are becoming necessary for the electronic equipment to meet harmonic regulations and standards . Here a single phase PFC rectifier is analysed , it has less number of components count, higher power density and less conduction losses . Open loop and closed loop simulation results are provided to verify the performance. KEYWORDS:Bridgeless resonant PFC rectifier , Power factor correction , Single phase rectifier ,Total harmonic distortion(THD). I.INTRODUCTIONAccording to the demand on high efficiency and low harmonic pollution, the active power factor correction (PFC) circuits are commonly employed in ac-dc converters and switched-mode power supplies. Generally, these converters include a full-bridge diode rectifier on an input current path so that conduction losses on the full-bridge diode occur and it will be worse especially at the low line. To overcome this problem, bridgeless converters have recently been introduced to reduce or eliminate the full-bridge rectifier, and hence their conduction losses. Most of the conventional proposed bridgeless PFC converters have at least one of the following drawbacks-high components count, components are not fully utilized over whole ac-line cycle, complex control, lack of galvanic isolation due to the floating ground, some topologies require additional diodes and/or capacitors to minimize EMI.In this paper, the converter operate in resonant mode to obtain an automatic PFC close to unity in a simple manner. The resonant mode operation have zero-current turn-on in the active power switches, zero-current turn-off in the output diode and this reduces the complexity of the control circuitry. The advantages of the converter is less number of components, low switching losses, high efficiency etc. Open loop simulation and closed loop simulation are provided in this report for performance evaluation.Next section discusses the principle of operation of proposed Bridgeless PFC converter and also its modes of operation. Third section deals with the closed loop and open loop simulation diagrams and results. Fourth section concludes the topic. II.LITEARTURE SURVEYPower factor correction is important in switched mode power supplies. Most of the PFC rectifier include a boost/buckboost topology converter at their front end due to its high power factor (PF) capability. The major disadvantage of the conventional PFC converters is its lower efficiency due to significant losses in the diode bridge. In order to reduce these problem, an efficient bridgeless PFC circuit topologies were developed..Bu t these bridgeless PFC topologies also have some following drawbacks like high components count, components are not fully utilized over whole ac-line cycle, complex control, dc output voltage is always higher than the peak input voltage, lack of galvanic isolation, and due to the floating ground, some topologi...

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“…These harmonic currents cause a lower power factor at the ac mains, voltage distortion and noise [1]- [3]. To comply with harmonic standards and to increase transmission efficiency in power systems, PFC techniques are necessary in ac-dc power converters [4], [5]. In addition, electronic equipment benefits from power converters with high efficiency over a wide range of input and output voltages [6].…”

Section: Introductionmentioning

confidence: 99%

Single-Phase Bridgeless Zeta PFC Converter with Reduced Conduction Losses

Khan¹,

Rahim²,

Bakar³

et al. 2015

Journal of Power Electronics

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This paper presents a new single phase front-end ac-dc bridgeless power factor correction (PFC) rectifier topology. The proposed converter achieves a high efficiency over a wide range of input and output voltages, a high power factor, low line current harmonics and both step up and step down voltage conversions. This topology is based on a non-inverting buck-boost (Zeta) converter. In this approach, the input diode bridge is removed and a maximum of one diode conducts in a complete switching period. This reduces the conduction losses and the thermal stresses on the switches when compare to existing PFC topologies. Inherent power factor correction is achieved by operating the converter in the discontinuous conduction mode (DCM) which leads to a simplified control circuit. The characteristics of the proposed design, principles of operation, steady state operation analysis, and control structure are described in this paper. An experimental prototype has been built to demonstrate the feasibility of the new converter. Simulation and experimental results are provided to verify the improved power quality at the AC mains and the lower conduction losses of the converter.

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Bridgeless SEPIC PFC Rectifier With Reduced Components and Conduction Losses

Cited by 243 publications

References 19 publications

Interleaved Sepic Converters for AC-DC Front-End Converter Application

Interleaved Sepic Converters for AC-DC Front-End Converter Application

Analysis of Bridgeless PFC Rectifier using MATLAB-SIMULINK

Single-Phase Bridgeless Zeta PFC Converter with Reduced Conduction Losses

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