A bridgeless Cuk PFC converter

A novel buck-boost converter is presented in this study. This converter is based on Cuk converter. Therefore it inherits all the advantages of Cuk converter such as low output voltage ripple and minimal radio frequency interference. In addition, some implementation problems of KY converters are solved. The proposed converter has higher voltage gain in step-up mode in comparison with Cuk converter. Moreover, this converter expands the continuous conduction mode (CCM) operational region. In the suggested topology, the gate of the switch is referenced to ground, so this converter does not need a floating gate drive. Simulation results of the suggested converter are presented in different operational conditions. To verify the operation of the proposed converter, experimental results are provided using a hardware prototype that operates in both CCM and discontinuous conduction mode.

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“…2a, the voltage ripples of C 3 in modes I and II are the same. For t = (D + D′)T and t 0 = DT in (22), yielding…”

Section: Ccm Operationmentioning

confidence: 99%

“…Recently, some buck–boost converters are also presented for PFC like in [21]. The location of the inductors at the input and output stages of the Cuk converter cause the input and output currents would be never turned off abruptly [22].…”

Section: Introductionmentioning

confidence: 99%

Design, analysis and implementation of a buck–boost DC/DC converter

Ajami

Ardi

Farakhor

2014

IET Power Electronics

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“…Besides, the input voltage and current sources are not in‐phase, which will eventually deteriorate the PF of conventional bridgeless. Nevertheless, the advantage of the conventional bridgeless is it only requires one diode rectifier to conduct during positive‐half and negative‐half cycles [28].…”

Section: Introductionmentioning

confidence: 99%

Modified single‐switch bridgeless PFC SEPIC structure by eliminating circulating current and power quality improvement

Noor

Ponniran

Rashid

et al. 2019

IET Power Electronics

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In this study, a modified single-switch bridgeless power factor correction (PFC) single-ended primary-inductor converter (SEPIC) structure is proposed. The major practical drawbacks of the existing structure are the presence of circulating current and high maximum current stress at the input capacitor and line diodes. Therefore, to overcome these problems, the existing structure is restructured by repositioning the line diodes in series with input inductors. Besides, the principle of design parameters optimisation is used based on the balancing energy compensation between input capacitors and output inductor. This structure is designed to operate in discontinuous conduction mode in order to achieve almost a unity power factor. The operation principle and design consideration of the modified structure is introduced in details. The experimental results demonstrate that the total harmonic distortion current is reduced from 56.3 to 4.9% after the optimisation process is performed, and at the same time the dead zones are inherently eliminated. Furthermore, it is shown that the output voltage ripple frequency is always double from the input line frequency of 50 Hz and the output voltage ripple is constantly lower than the maximum input voltage ripple. Thus, the designed parameters of the experimental converter are verified with ∼160 W of the converter output power.

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“…Several non-boost bridgeless rectifiers have been published lately [6]- [10]. A bridgeless PFC rectifier based on Sepic topology is presented in [8].…”

Section: Introductionmentioning

confidence: 99%

High efficiency Bridgeless Unity Power factor CUK converter Topology

AL-Kaabi¹,

Fardoun²,

Ismail³

2013

REPQJ

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A step-up bridgeless single phase ac-dc power factor correction (PFC) rectifier based on Cuk topology is proposed for high voltage battery charger application. The proposed topology consists of common input stage and parallel output stages. It utilizes one control signal over the whole line cycle. In addition, the proposed converter exhibits low inrush current and low magnetic emissions as classical Cuk topology. The bridgeless topology results in lower conduction losses as compared with conventional Cuk converter. Simulation and experimental results are presented along with the theoretical analysis.

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A bridgeless Cuk PFC converter

Cited by 24 publications

References 8 publications

Design, analysis and implementation of a buck–boost DC/DC converter

Design, analysis and implementation of a buck–boost DC/DC converter

Modified single‐switch bridgeless PFC SEPIC structure by eliminating circulating current and power quality improvement

High efficiency Bridgeless Unity Power factor CUK converter Topology

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