scholarly journals Improvement of Power Factor by Input Filter and Ripple Reduction using Cuk Converter in Continuous Conduction Mode

2019 ◽  
Vol 8 (6) ◽  
pp. 4938-4945
Keyword(s):  
Power Factor ◽  
Closed Loop ◽  
Harmonic Distortion ◽  
Distortion Factor ◽  
Cuk Converter ◽  
Battery Chargers ◽  
Input Filter ◽  
Ripple Reduction ◽  
Source Current ◽  
Sinusoidal Shape

The basic Converters like buck, boost and buckboost provide pulsed ripple currents either on input or output sides. A Cuk Converter has inductors on both input and output sides, thus produces continuous currents with reduced ripple. By extending the Cuk Converter to AC side with the support of additional rectifier circuit the power factor can be assessed. The significant concerns when utilizing DC-DC converters with AC source is large Total Harmonic Distortion (THD) and low power factor. A properly designed filter circuit on AC side reduces THD and improves the power factor. In this paper a Cuk Converter (CC) topology with rectifier and inductive. capacitive. inductive (LCL) filter is proposed to reduce THD and improve the power factor. The CC circuit is designed and analyzed to reduce ripple content of currents. The reduction in ripple on DC side in turn improves the sinusoidal shape of current on AC source side. The closed loop simulation of the proposed circuit is carried out using a systematically derived type III compensator. The proposed circuit is practically validated in closed loop using FPGA controller to confirm the simulated waveforms. The results substantiate the fact that the proposed circuit shrinks ripple on DC source side and reduces harmonics of AC source current. The reduction in harmonics decreases THD to a large extent and improves distortion factor, which enhances the power factor. Also the reduction in ripple trims down losses in the circuit and improves the output power, thus suitable for DC to DC conversions in power supplies for viz. electric vehicles, computers, battery chargers and televisions. The improvement in power factor reduces the power drawn from the source and hence the efficiency of the system is improved.

scholarly journals Input switched closed-loop single phase ĈUK AC to DC converter with improved power quality

2019 ◽  
Vol 10 (3) ◽  
pp. 1373
Author(s):  
Md. Shamsul Arifin ◽  
Nur Mohammad ◽  
Mohammad Ibrahim Khalil ◽  
Mohammad Jahangir Alam
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Closed Loop ◽  
Harmonic Distortion ◽  
Open Loop ◽  
Current Control ◽  
Control Loop ◽  
Cuk Converter ◽  
Wide Range ◽  
A Current

<span lang="EN-US">A new closed loop AC to DC ĈUK converter is presented in this paper. The conventional ĈUK AC to DC converter has no feedback circuit. Thereby, the output voltage of the converter changes while changing the load. The proposed closed loop converter can regulate voltage with the variation of load over a wide range. Moreover, the power factor and Total Harmonic Distortion (THD) of the supply side current found quite satisfactory from this closed loop ĈUK converter. The converter operates in four steps with a different combination of voltage polarities and switching states. The feedback path consists of a voltage control loop and a current control loop. The closed loop ĈUK converter in this study is compared with the open loop version. Additionally, the comparison is made with the conventional converter of the same topology. The effectiveness in terms of power factor and THD of the proposed converter is verified using simulation results.</span>

scholarly journals Power Quality Improvement using Modified Cuk-Converter with Artificial Neural Network Controller Fed Brushless Dc Motor Drive

2019 ◽  
Vol 9 (2) ◽  
pp. 3871-3877
Keyword(s):  
Power Factor ◽  
Harmonic Distortion ◽  
Dc Motor ◽  
Pi Controller ◽  
Brushless Dc Motor ◽  
Motor Drive ◽  
Cuk Converter ◽  
Brushless Dc ◽  
Neural Network Controller ◽  
Network Controller

Power factor rectification converter (PFRC) hinged bridgeless modified CUK (MCUK) converter supplied to brushless DC engine drive utilizing an Artificial Neural Network controller. Presently, alteration for traditional CUK converter can be obtained through adding a voltage multiplier circuit, to decrease converter losses for wide variation of speed to accomplish most extreme Power Factor and to limit the Total Harmonic Distortion (THD). The designed bridgeless PFRC based converter was investigated hypothetically to obtain the circumstances, for example, Power factor (PF) and Total Harmonic Distortion (THD) are assessed and contrasted with traditional Diode Bridge Rectifier hinged CUK converter supplying to brushless DC motor drive and bridgeless altered CUK using PI controller driven brushless DC motor. Here, simulation results uncover that the ANN controllers are viable and productive contrasted with PI controller, as the steady state error when ANN control used is less and the stabilization of the system is better while using it. Additionally in ANN system, the time to perform calculation is less as there are no numerical models. The performance of the designed framework is simulated in MATLAB/Simulink environment.

scholarly journals Performance Between PFC Cuk and Bridgeless PFC Cuk Converter with Various Output Voltages

2019 ◽  
Vol 8 (2S2) ◽  
pp. 41-46
Keyword(s):  
Low Power ◽  
Power Factor ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Input Current ◽  
Unity Power Factor ◽  
Cuk Converter ◽  
Maximum Current ◽  
Simulation Results ◽  
Power Application

This paper presents about the comparison between single-phase PFC Cuk converter and bridgeless PFC (BPFC) Cuk converter for low power application. This study attempts to investigate the characteristics of conventional and bridgeless PFC Cuk converter structures with three different output voltages and verified by the simulation results. The BPFC Cuk converter provides a lower Total Harmonic Distortion (THD) of input current than the conventional PFC Cuk converter. However, the conventional PFC Cuk converter has advantage of less maximum current stress at components compared to the BPFC Cuk converter. Conventional and BPFC Cuk converter can achieve an approximately unity power factor (PF).

A Novel Power Factor Correction Modified Bridge Less-CUK Converter for LED Lamp Applications

2016 ◽  
Vol 7 (3) ◽  
pp. 880
Author(s):  
Saravanan D ◽  
Gopinath M
Keyword(s):  
Power Factor ◽  
Power Supply ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Quality Indices ◽  
Power Utility ◽  
Cuk Converter ◽  
Bridge Rectifier ◽  
Converter Design ◽  
Efficient Power

In recent decades, several research works have been focused on the efficient Power Factor Correction (PFC) converter design in to meet the power supply efficiency. Conventional PFC cuk converter widely uses the full bridge rectifier which had resulted in overall increase of converter losses and inefficiency. This paper is intended to develop a novel PFC Bridgeless cuk converter for LED lamp applications. In this work, the limitations of the conventional PFC Cuk converter are resolved. The major contributions of the proposed work include the minimization in the number of conduction devices and minimization of the power utility devices which in turn resulted in minimal losses and better efficiency. Moreover, the proposed converter works in DCM which requires only one voltage sensor which results in reduced cost. The proposed Modified BL Cuk converter (MBL-CUK) for LED lamp is simulated in MATLAB and the corresponding results show the better power quality indices such as power factor and Total Harmonic Distortion.

Analysis of a Novel Single Phase AC-DC CUK Converter with Low Input Current, THD to Improve the Overall Power Quality Using PFC

2018 ◽  
Author(s):  
Shadman Sakib ◽  
Ahmed Jawad Kabir ◽  
Shajal Khansur ◽  
Jewel Rana
Keyword(s):  
Power Factor ◽  
Single Phase ◽  
Closed Loop ◽  
Power Factor Correction ◽  
Performance Comparison ◽  
Open Loop ◽  
Input Current ◽  
Low Input ◽  
Analysis And Design ◽  
Cuk Converter

In this paper, analysis and design of a novel single phase AC-DC CUK converter circuit has been proposed where Power Factor Correction (PFC) controller scheme has been used in order to obtain better performance than conventional converters. Closed loop technique is applied to the bridgeless converter in order to achieve low input current, Total Harmonic Distortion (THD) at input AC mains along with near unity power factor. Performance comparison between open loop and closed loop of the proposed converter is made without filtering. The problems arise with open loop is sufficiently minimized by using power factor correction controller. The performance comparison between proposed and conventional CUK AC-DC converter operating in Continuous Conduction Mode (CCM) is made based on circuit simulations using PSIM softwere.

scholarly journals A Novel and Cost-Effective Drive Circuit for Supplying a Piezoelectric Ceramic Actuator with Power-Factor-Correction and Soft-Switching Features

Micromachines ◽  
2021 ◽  
Vol 12 (10) ◽  
pp. 1229
Author(s):  
Chun-An Cheng ◽  
Hung-Liang Cheng ◽  
Chien-Hsuan Chang ◽  
En-Chih Chang ◽  
Chih-Yang Tsai ◽  
...  
Keyword(s):  
Power Factor ◽  
Piezoelectric Ceramic ◽  
Power Factor Correction ◽  
Harmonic Distortion ◽  
Cost Effective ◽  
Soft Switching ◽  
Distortion Factor ◽  
Inductive Load ◽  
Power Switches ◽  
Drive Circuit

This paper proposes a novel and cost-effective drive circuit for supplying a piezoelectric ceramic actuator, which combines a dual boost AC-DC converter with a coupled inductor and a half-bridge resonant DC-AC inverter into a single-stage architecture with power-factor-correction (PFC) and soft-switching characteristics. The coupled inductor of the dual boost AC-DC converter sub-circuit is designed to work in discontinuous conduction mode (DCM), so the PFC function can be realized in the proposed drive circuit. The resonant tank of the half-bridge resonant inverter sub-circuit is designed as an inductive load, so that the two power switches in the presented drive circuit can achieve zero-voltage switching (ZVS) characteristics. A 50W-rated prototype drive circuit providing a piezoelectric ceramic actuator has been successfully implemented in this paper. From the experimental results at 110V input utility-line voltage, the drive circuit has the characteristics of high power factor and low input current total-harmonic-distortion factor, and two power switches have ZVS characteristics. Therefore, satisfactory outcomes from measured results prove the function of the proposed drive circuit.

scholarly journals Current Interactions Mitigation in 3-Phase PFC Modular Rectifier through Differential-Mode Choke Filter Boost Converter

2021 ◽  
Vol 11 (4) ◽  
pp. 1684
Author(s):  
José Teixeira Gonçalves ◽  
Stanimir Valtchev ◽  
Rui Melicio
Keyword(s):  
Power Factor ◽  
Harmonic Distortion ◽  
Electrical Energy ◽  
Boost Converter ◽  
International Standards ◽  
Differential Mode ◽  
Driving Mode ◽  
Three Phase ◽  
Sinusoidal Shape

In this paper, a new way to mitigate the current interactions is proposed. The problem of current interactions arises when a modular three-phase (3-phase) rectifier (three single-phase modules) with boost converter for power factor correction (PFC) is used. A new differential-mode choke filter is implemented in the developed boost converter. The choke here is a specially made differential inductor in the input of the boost converter that eliminates the known current interactions. To prove the new concept, a study of the level of mitigation of the current interactions is presented. The control is operated in continuous driving mode (CCM), and the popular UC3854B circuit was used for this. The rectifier proposal is validated through a set of simulations performed on the PSIM 12.0 platform, as well as the construction of a prototype. With the results obtained, it is confirmed that the differential-mode choke filter eliminates the current interactions. It is observed that at the input of the rectifier, a sinusoidal alternating current with a low level of harmonic distortion is consumed from the grid. The sinusoidal shape of the phase current proves that a better power factor capable of meeting the international standards is obtained, and that the circuit in its initial version is operational. This proven result promises a good PFC operation, to guarantee the better quality of the electrical energy, being able to be applied in systems that require a high PFC, e.g., in battery charging, wind systems, or in aeronautics and spacecrafts.

scholarly journals Input switched closed-loop single phase SEPIC controlled rectifier with improved performances

2021 ◽  
Vol 11 (1) ◽  
pp. 1
Author(s):  
Md. Shamsul Arifin ◽  
Mohammad Jahangir Alam
Keyword(s):  
Power Factor ◽  
Closed Loop ◽  
Harmonic Distortion ◽  
Input Voltage ◽  
Input Power ◽  
Open Loop ◽  
Dc Power ◽  
Wide Range ◽  
Input Side ◽  
Flow Through

DC power supply has become the driving source for some essential modern applications. Thereby, DC power conditioning has become a significant issue for engineers. Typically used rectifiers associated with a bridge structure is nonlinear in nature. Thereby, the current at input side of the rectifier contains harmonics, which also flow through the power line. The presence of harmonics causes several interruptions and reduce power quality. In this regard, a new close loop SEPIC controlled rectifier is proposed in this paper. The conventional scheme is arranged with a rectifier connected to a DC-DC converter, which is an open loop system. Consequently, such system cannot regulate voltage at load varying condition. The proposed SEPIC controlled rectifier can regulate voltage under load varying condition for a wide range. Additionally, the performance in terms of total harmonic distortion (THD) of input current and power factor at AC side are also within satisfactory range for the closed loop configuration. The controlled rectifier has four operating phases associated with switching states and input voltage polarity. The close loop configuration also incorporates a current and a voltage loop at the feedback path. The comparative studies have been performed among the proposed closed loop construction, the open-loop structure as well as the conventional construction. The effectiveness of the proposed controlled rectifier is verified in terms of THD and input power factor considering the results obtained from simulation.

scholarly journals Analysis of Non-Minimum Phase System for AC/DC Battery Charger Power Factor Correction Converter

2022 ◽  
Vol 12 (2) ◽  
pp. 868
Author(s):  
Mahmoud Nassary ◽  
Enric Vidal-Idiarte ◽  
Javier Calvente
Keyword(s):  
Power Factor ◽  
Output Voltage ◽  
Transfer Functions ◽  
Dynamic Performance ◽  
Harmonic Distortion ◽  
Phase System ◽  
Minimum Phase ◽  
Input Output ◽  
Voltage Range ◽  
Battery Chargers

Electric mobility is nowadays one of the more important trends regarding pollution reduction and global warming due to fuel consumption. Big efforts are done in order to develop efficient and reliable power electronic systems for electric vehicles. In two stage on board-battery chargers, one way of improving efficiency is by means of ensuring the DC-DC isolated converter always operates in the nominal input/output voltage ratio, that could be achieved with a variable DC-link operation. In this paper, a four-switch buck-boost based AC/DC converter is deeply analyzed in order to improve its dynamic performance, the power factor and the total harmonic distortion. The converter suffers from a non-minimum phase characteristic in different input–output transfer functions, which reduces the closed-loop bandwidth of the system. Therefore, after a deep converter analysis has been done, different solutions have been evaluated and tested. Finally, a control to different output transfer functions of the converter become minimum phase, which allows us to increase the system bandwidth and, consequently, high power factor, low harmonics distortion, single control structure and fast dynamics for wide output voltage range are achieved.

scholarly journals Design, Simulation and Analysis of Single Phase AC to DC Cuk Converter Fed Led Applications

2020 ◽  
pp. 49-56
Author(s):  
R. Kalai Priya
Keyword(s):  
Power Factor ◽  
Fuzzy Logic Control ◽  
Single Phase ◽  
Harmonic Distortion ◽  
Paper Analysis ◽  
Unity Power Factor ◽  
Cuk Converter ◽  
Logic Control ◽  
Bridge Rectifier ◽  
Hysteresis Control

This paper analysis with PFC Cuk converter fed LED drive to overcome the power factor problems. The proposed circuit topology consists of diode bridge rectifier and Cuk converter. Cuk converter is operated to work under CCM mode. This combination of DBR and PFC converter is used to feed a LED drive. This converter is simulated in MATLAB software. This Cuk converter provides better results such as unity power factor and low current harmonic distortion with fuzzy logic control and hysteresis control.

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