Journal articles: 'DC-DC SEPIC converters'

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Litrán, Salvador P., Eladio Durán, Jorge Semião, and Rafael S. Barroso. "Single-Switch Bipolar Output DC-DC Converter for Photovoltaic Application." Electronics 9, no. 7 (July 18, 2020): 1171. http://dx.doi.org/10.3390/electronics9071171.

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Bipolar DC grids have become an adequate solution for high-power microgrids. This is mainly due to the fact that this configuration has a greater power transmission capacity. In bipolar DC grids, any distributed generation system can be connected through DC-DC converters, which must have a monopolar input and a bipolar output. In this paper, a DC-DC converter based on the combination of single-ended primary-inductor converter (SEPIC) and Ćuk converters is proposed, to connect a photovoltaic (PV) system to a bipolar DC grid. This topology has, as main advantages, a reduced number of components and a high efficiency. Furthermore, it can contribute to regulate/balance voltage in bipolar DC grids. To control the proposed converter, any of the techniques described in the literature and applied to converters of a single input and single output can be used. An experimental prototype of a DC-DC converter with bipolar output based on the combination of SEPIC and Ćuk converters was developed. On the other hand, a perturb and observe method (P and O) has been applied to control the converter and has allowed maximum power point tracking (MPPT). The combined converter was connected in island mode and in parallel with a bipolar DC microgrid. The obtained results have allowed to verify the behavior of the combined converter with the applied strategy.

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Palanisamy, R., K. Vijayakumar, V. Venkatachalam, R. Mano Narayanan, D. Saravanakumar, and K. Saravanan. "Simulation of various DC-DC converters for photovoltaic system." International Journal of Electrical and Computer Engineering (IJECE) 9, no. 2 (April 1, 2019): 917. http://dx.doi.org/10.11591/ijece.v9i2.pp917-925.

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This work explains the comparison of various dc-dc converters for photovoltaic systems. In recent day insufficient energy and continues increasing in fuel cost, exploration on renewable energy system becomes more essential. For high and medium power applications, high input source from renewable systems like photovoltaic and wind energy system turn into difficult one, which leads to increase of cost for installation process. So the generated voltage from PV system is boosted with help various boost converter depends on the applications. Here the various converters are like boost converter, buck converter, buck-boost converter, cuk converter, sepic converter and zeta converter are analysed for photovoltaic system, which are verified using matlab / simulink.

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Zhang, Hao, Min Jing, Shuai Dong, Wei Liu, and Zhaohua Cui. "Effect of Modal Interaction on Transient Behavior in Double-Input SEPIC DC–DC Converters." International Journal of Bifurcation and Chaos 30, no. 10 (August 2020): 2050145. http://dx.doi.org/10.1142/s021812742050145x.

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In this paper, we exploit an idea of nonlinear modal series method to investigate the effects of modal interaction in the one-cycle controlled (OCC) double-input SEPIC DC–DC converter. Based on the proposed nonlinear averaged model, the analytical approximate solutions are obtained to characterize the dynamic response characteristic of the transient behaviors in the double-input SEPIC converters. The fundamental modal analysis is utilized to identify the dominant oscillation modes and discover the relationship between parameters, fundamental modes and state variables. Furthermore, the second-order interaction indices are proposed to uncover the underlying mechanism of nonlinear interaction behaviors. In particular, the correlation between parameters and modal interaction are derived to optimize the transient process of the double-input SEPIC converters. Finally, numerical simulations are performed to verify the theoretical analysis.

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Surya, Sumukh, and Sheldon Williamson. "Generalized Circuit Averaging Technique for Two-Switch PWM DC-DC Converters in CCM." Electronics 10, no. 4 (February 5, 2021): 392. http://dx.doi.org/10.3390/electronics10040392.

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Design of DC-DC converters like Cuk and SEPIC, which are fourth-order converters, play a vital role in the design of electric vehicle (EV) charging systems and drivers for LED. These converters possess a unique feature of input current being continuous due to the presence of an inductor in series with the supply voltage. In the present work, a generalized approach for obtaining the frequency response of the transfer function of the duty cycle to output voltage (Gvd) for converters operating in continuous conduction mode (CCM) having two switches is proposed. A practical Cuk converter and SEPIC operating in CCM were selected and their analyses in open loop were studied using the LTSpice simulation tool. The behavior of the output voltage and inductor currents under variable ESR’s (equivalent series resistance) of inductors was studied. It was observed that Gvd of these converters was unstable. Hence, an appropriate controller to stabilize the system and achieve a proper gain margin and phase margin in closed-loop operation is required.

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Ali Azam Khan, Md, and Mohammad Ali Choudhury. "Efficient Voltage Regulation with Modified Hybrid SEPIC DC-DC-Converter." MATEC Web of Conferences 160 (2018): 02004. http://dx.doi.org/10.1051/matecconf/201816002004.

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Switch mode dc-dc converters are attractive for their small size, ease of control and efficient power conversion. Output voltage is regulated by duty cycle control of semiconductor switch of switch mode dc-dc converters. The voltage gain and efficiency of practical switching regulators deviate from ideal values at extreme duty cycles. Also, desired gain /attenuation is not achievable at high/low duty cycles. In applications where high gain or high attenuation of voltage is desired with acceptable energy conversion efficiency, hybrid dc-dc switching converters are used. Hybrid dc-dc converters are combination of voltage multiplier/division circuit with appropriate SMPS circuits. By incorporating voltage multiplier/division cell with conventional SEPIC converters, desired voltage gain (either very low or very high) may be achieved at acceptable energy conversion efficiency. In the present work with an aim to attain very high voltage gain by conventional SEPIC topologies, a new voltage multiplier cell consisting of multiple inductors and diodes is proposed.

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Siddharthan, Niranjana, and Baskaran Balasubramanian. "Performance evaluation of SEPIC, Luo and ZETA converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 1 (March 1, 2019): 374. http://dx.doi.org/10.11591/ijpeds.v10.i1.pp374-380.

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DC-DC converters are devices which convert direct current (DC) from one voltage level to another by changing the duty cycle of the main switches in the circuits. These converters are widely used in switched mode power supplies and it is important to supply a constant output voltage, regardless of disturbances on the input voltage. In this work, the performance of three different converters such as Single-Ended Primary-Inductance Converter (SEPIC), Luo converter and ZETA converter have been analyzed. Further, the parameters values such as ripple voltage, switching losses and efficiency of the proposed three different converters were compared with each other. Also, the simulation work has been carried out using MATLAB/SIMULINK software. From the comparison of obtained results, it is observed that the ZETA converter has high significance than the SEPIC and Luo converter.

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Sehirli, Erdal. "Comparison of Dc-Dc SEPIC, CUK and Flyback Converters Based LED Drivers." Light & Engineering, no. 01-2020 (February 2020): 99–107. http://dx.doi.org/10.33383/2018-70.

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This paper presents the comparison of LED driver topologies that include SEPIC, CUK and FLYBACK DC-DC converters. Both topologies are designed for 8W power and operated in discontinuous conduction mode (DCM) with 88 kHz switching frequency. Furthermore, inductors of SEPIC and CUK converters are wounded as coupled. Applications are realized by using SG3524 integrated circuit for open loop and PIC16F877 microcontroller for closed loop. Besides, ACS712 current sensor used to limit maximum LED current for closed loop applications. Finally, SEPIC, CUK and FLYBACK DC-DC LED drivers are compared with respect to LED current, LED voltage, input voltage and current. Also, advantages and disadvantages of all topologies are concluded.

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Komurcugil, Hasan, Samet Biricik, and Naki Guler. "Indirect Sliding Mode Control for DC–DC SEPIC Converters." IEEE Transactions on Industrial Informatics 16, no. 6 (June 2020): 4099–108. http://dx.doi.org/10.1109/tii.2019.2960067.

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Chilambarasan, M., M. Ramesh Babu, and T. Jones Basil. "Comparison of DC-DC Converters for Photo-Voltaic Application." Applied Mechanics and Materials 787 (August 2015): 864–68. http://dx.doi.org/10.4028/www.scientific.net/amm.787.864.

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Electricity demand is a major concern in the world today. To meet this demand, a number of natural sources are used for electricity production. The produced electrical energy from these natural sources will be given to consumers after going through a lot of conversion stages. So losses mostly occur in these conversion stages. In this paper the four existing converters CUK, SEPIC, Self-lift CUK and Self-lift SEPIC performances are separately compared and analyzed with each other. The voltage-lift (VL) technique is a popular method that is widely applied in electronic circuit design. This technique overcomes the effects of parasitic elements and increases the output voltage effectively along with high power efficiency and high power density with a simple structure. The operating principles of these converters are discussed and Simulation results are provided to verify and compare the feasibility of each systemwith solar photo-voltaic panel incorporated maximum power point tracking (MPPT).

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Bonab, Hossein Ajdar Faeghi, and Mohamad Reza Banaei. "Enhanced Buck-Boost dc–dc Converter with Positive Output Voltage." Journal of Circuits, Systems and Computers 29, no. 05 (July 10, 2019): 2050072. http://dx.doi.org/10.1142/s0218126620500723.

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In this paper, a new transformerless buck-boost converter is presented. The voltage gain of the converter is higher than the classic boost converter, classic buck-boost converter, CUK and SEPIC converters. The proposed converter advantage is buck-boost capability. The proposed converter topology is simple; therefore, the converter control is simple. The converter has one main switch. Hence, the switch with low switching and conduction losses can be used. The stress of the main switch is low; therefore, switch with low on-state resistance can be selected. The principles of the converter and mathematic analyses are presented. The validity of the accuracy of calculations is verified by the experimental results.

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Luthfansyah, Mohammad, Suyanto Suyanto, and Abu Bakarr Momodu Bangura. "Evaluation and Comparison of DC-DC Power Converter Variations in Solar Panel Systems Using Maximum Power Point Tracking (MPPT) Flower Pollination Algorithm (FPA) Control." E3S Web of Conferences 190 (2020): 00026. http://dx.doi.org/10.1051/e3sconf/202019000026.

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Maximum Power Point Tracking (MPPT) is a method that can be used to optimize the electrical power output from solar panels. The performance of the MPPT method on solar panel systems can be influenced by many variables. One of them is the selection of a DC-DC power converter. DC-DC-DC Converter is a component that is used to optimize the performance of solar panels. Several types of DC-DC Converter are Buck, Buck-Boost, Single Ended Primary Inductance Converter (SEPIC), and CUK. Each converter has a different effect on solar panels output power. In order to observe and make a comprehensive analysis, simulations are performed through PSIM (Power Simulator) software on the performance of several DC-DC Converters that use Flower Pollination Algorithm (FPA) as the MPPT algorithm. Variables that observed are the output power characteristic, the response of the voltage-current ripple signal, and the accuracy of the converter in the process of reaching the maximum power point condition. As a result, CUK converter can obtain the highest value of solar panel output power, 145.02 W. A low ripple level with a stable power value response is entirely generated by CUK and SEPIC Converter. Overall, for this system, the CUK converter has better performance than the other converters.

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Gnana Vadivel, J., K. Sree Revathy, S. T. Jaya Christa, and N. Senthil Kumar. "Analysis and Design of Single Phase AC-DC Modified SEPIC Converter." Applied Mechanics and Materials 573 (June 2014): 108–14. http://dx.doi.org/10.4028/www.scientific.net/amm.573.108.

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Power electronic devices with front-end rectifier are widely used in industry, commerce and transportation, which result in low power factor. Though there are several proposed solutions to this, Single Ended Primary Inductance Converter (SEPIC) converter was the most successful one. But the conventional SEPIC converters suffer from high switching losses. Hence in this paper, a modified SEPIC converter is used to improve the power factor at the mains side. This paper presents the simulation and analysis of single phase single-switch, converter topologies of AC-DC SEPIC converter and modified SEPIC converter for Continuous Conduction Mode (CCM) of operation with 48V, 100W output power. The results of SEPIC converter and modified SEPIC converter are compared for closed loop analysis in simulation which is done in PSIM. It is found that modified SEPIC converter has high regulated output voltage and high power factor.

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Zhang, Hailong, Yafei Chen, Sung-Jun Park, and Dong-Hee Kim. "A Family of Bidirectional DC–DC Converters for Battery Storage System with High Voltage Gain." Energies 12, no. 7 (April 3, 2019): 1289. http://dx.doi.org/10.3390/en12071289.

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In low power energy storage systems, to match the voltage levels of the low-voltage battery side and high-voltage direct current (DC) bus, a high voltage gain converter with bidirectional operation is required. In this system, the cost effectiveness of the design is a critical factor; therefore, the system should be designed using a small number of components. This paper proposes a set of bidirectional converters with high voltage gain range based on the integration of the boost converter with a Ćuk converter, single ended primary inductor converter (Sepic), and buck-boost converter. The proposed converters consist of a small number of components with a high voltage gain ratio. Detailed comparisons are made with respect to the operating mode, number of components, voltage, and current ripple and efficiency. The efficiency of proposed converters are higher than the conventional converters in entire power range, and 6% higher efficiency can be achieved in large duty cycle by calculating loss analysis. To verify performances of the proposed converters, three 200-W prototypes of the converters are developed under the same experimental conditions. The results revealed that converter I exhibits the highest efficiency in the boost mode (92%) and buck mode (92.2%). The experimental results are shown to verify the feasibility and performances of the set of converters.

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Verma, Chanchal, and B. Anjanee Kumar. "Comparison of dc-dc converters with SEPIC converter for wind driven Induction generators." International Journal of Engineering Trends and Technology 39, no. 4 (September 25, 2016): 180–83. http://dx.doi.org/10.14445/22315381/ijett-v39p231.

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Islam, Md Maidul, and Md Mamun Ur Rashi. "Development of a New High Frequency Two Quadrant DC-DC Sepic Converter." Asia Pacific Journal of Energy and Environment 5, no. 1 (June 30, 2018): 31–40. http://dx.doi.org/10.18034/apjee.v5i1.248.

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The DC-DC converter find a wide scope in industries, telecommunication sectors, power electronics area, etc. Nowadays bi-directional converters have a higher end over them since the energy from the load during regenerative braking is fed back to the source, thus obtaining energy efficient system. A single topology that can provide Buck-Boost operation with positive output having four quadrant operations is not available in the literature. A common limitation of power coupling effect in some known multiple-input dc-dcconverters has been addressed in many kinds of literatures. In this paper, a new single topology of two quadrants DC-DC Sepic converter has been developed to provide four quadrant operation of a high- frequency dc-dc converter having one supply source and proper control of the converter. The combined topology has been analyzed and studied by spice simulation.

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Vaigundamoorthi, M., R. Ramesh, V. Vasan Prabhu, and K. Arul Kumar. "MPPT oscillations minimization in PV system by controlling non-linear dynamics in SEPIC DC-DC converter." International Journal of Electrical and Computer Engineering (IJECE) 10, no. 6 (December 1, 2020): 6268. http://dx.doi.org/10.11591/ijece.v10i6.pp6268-6275.

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Solar PV power generation has achieved rapid growth in developing countries which has many merits such as absence of noise, longer life, no pollution, less time for installation, and ease of grid interface. A maximum power point tracking circuit (MPPT) consists of DC-DC power electronics converters that are used to improve the energy attainment from solar PV array. This paper presents a detailed analysis to control of chaos, a non-linear dynamic in SEPIC DC-DC converter interfaced solar PV system, to minimize the oscillations near to MPP. In SEPIC DC-DC converter, the input inductor current is continuous and capable of sweeping the whole I-V curve of a PV module from open circuit voltage (Voc) to short circuit current (Isc) operating points. To trace the true maximum power point and to nullify the oscillations near to MPP, the yield output voltage needs to ensure period-1 operation.

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Kalirasu, A. "A Novel Single Source Multiple Output Converter Integrating Buck-Boost and Fly Back Yopology for SMPS Applications." Indonesian Journal of Electrical Engineering and Computer Science 8, no. 3 (December 1, 2017): 733. http://dx.doi.org/10.11591/ijeecs.v8.i3.pp733-736.

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This paper presents a novel single DC input source and multiple DC output suitable for switched mode power supply (SMPS) applications integrating interleaved boost and sepic converter with fly back topology. The proposed converter can be remodeled for any required output voltage power supply without changing hardware structure because wide range of output voltage can be obtained using sepic and boost converters by changing duty cycle command by implementing a simple voltage input pi controller. Conventional fly back topology is added to interleaved circuit to produce desired dc output voltage this voltage can be controlled by choosing turns ratio of fly back transformer. The proposed multi output DC converter is simulated in MATLAB/Simulink environment and results are presented for verifying merits of the converter.

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Uma Maheswari, S., and K. V. Kandasamy. "Development of Zeta Converter for Permanent Magnet Brushless Direct Current Motor." Applied Mechanics and Materials 573 (June 2014): 102–7. http://dx.doi.org/10.4028/www.scientific.net/amm.573.102.

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Converter plays a vital role in modern transferable electronic devices and systems. In the battery operated transferable devices, the battery supplies an input voltage to the converter which in turn converts into the desired voltage. Buck-boost, Cuk, SEPIC and Zeta converter are meeting the operational requirements of DC-DC converters. The DC-DC converters are used in both buck function as well as boost function. But the advantage of Zeta converter is that, it does not suffer the polarity reversal problem. The aim of the proposed work is to design a Zeta converter which can be used to drive the Permanent Magnet Brushless Direct Current Motor. The proposed Zeta converter is suggested to control the speed of the Permanent Magnet Brushless Direct Current Motor, according to the generated switching sequence. The proposed work is generally used for low power applications and occasionally used for medium power applications.

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Kshatriya, Vamshi Krishna Varma, and Ram Kumar A. "A Novel M-SEPIC DC-DC Converter for BLDC Pumping System with Active PFC using ANFIS Controller." Indonesian Journal of Electrical Engineering and Computer Science 11, no. 1 (July 1, 2018): 386. http://dx.doi.org/10.11591/ijeecs.v11.i1.pp386-399.

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An exigent consumer related concerns confronted due to utilization of massive front-end AC-DC rectifier in a grid-tied BLDC pumping system. Harmonic distortions are acquired, which prompts the disruption of power quality at utility grid system due to AC-DC conversion. Several factors for enhancing power-quality concerns are ameliorate the grid power-factor along with reduction of harmonic distortions, tightened regulation of DC output voltage. In this way, the DC-DC boost converter plays a unique role; operated in Continuous Conduction Mode. Based on summarizing advantages & disadvantages of classical DC-DC converters, a single switch high voltage gain M-SEPIC DC-DC converter is more suggestive for water pumping system due to non-existence of coupled inductors, low switching loss, low di/dt stress, high efficiency, compact structure, low cost, etc. This work proposes the novel M-SEPIC DC-DC converter fed brushless-DC motor drive is controlled by voltage source inverter and powered by single-phase grid system with improved power-quality features. Moreover, Adaptive Neuro-Fuzzy Inference System is recommended for prediction of optimal switching states to amplify the BLDC motor speed and torque-ripple depreciation. The effectiveness of the proposed scheme is validated under constant speed situations by real-time operating conditions which are evaluated by Matlab /Simulink tool; and simulation results are conferred with attractive comparisons.

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Premkumar, Manoharan, Umashankar Subramaniam, Hassan Haes Alhelou, and Pierluigi Siano. "Design and Development of Non-Isolated Modified SEPIC DC-DC Converter Topology for High-Step-Up Applications: Investigation and Hardware Implementation." Energies 13, no. 15 (August 1, 2020): 3960. http://dx.doi.org/10.3390/en13153960.

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A new non-isolated modified SEPIC front-end dc-dc converter for the low power system is proposed in this paper, and this converter is the next level of the traditional SEPIC converter with additional devices, such as two diodes and splitting of the output capacitor into two equal parts. The circuit topology proposed in this paper is formulated by combining the boost structure with the traditional SEPIC converter. Therefore, the proposed converter has the benefit of the SEPIC converter, such as continuous input current. The proposed circuit structure also improves the features, such as high voltage gain and high conversion efficiency. The converter comprises one MOSFET switch, one coupled inductor, three diodes, and two capacitors, including the output capacitor. The converter effectively recovers the leakage energy of the coupled inductor through the passive clamp circuit. The operation of the proposed converter is explained in continuous conduction mode (CCM) and discontinuous conduction mode (DCM). The required voltage gain of the converter can be acquired by adjusting the coupled inductor turn’s ratio along with the additional devices at less duty cycle of the switch. The simulation of the proposed converter under CCM is carried out, and an experimental prototype of 100 W, 25 V/200 V is made, and the experimental outcomes are presented to validate the theoretical discussions of the proposed converter. The operating performance of the proposed converter is compared with the converters discussed in the literature. The proposed converter can be extended by connecting voltage multiplier (VM) cell circuits to get the ultra-high voltage gain.

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Khodabandeh, Masih, Ehsan Afshari, and Mahshid Amirabadi. "A Family of Ćuk, Zeta, and SEPIC Based Soft-Switching DC–DC Converters." IEEE Transactions on Power Electronics 34, no. 10 (October 2019): 9503–19. http://dx.doi.org/10.1109/tpel.2019.2891563.

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Zhang, Hao, Chuanzhi Yi, and Tianhang Wei. "Non‐linear modal analysis of transient interaction behaviours in SEPIC DC–DC converters." IET Power Electronics 10, no. 10 (June 27, 2017): 1190–99. http://dx.doi.org/10.1049/iet-pel.2016.0858.

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Sasikala, Rajagopal, and R. Seyezhai. "Review of AC-DC power electronic converter topologies for power factor correction." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 3 (September 1, 2019): 1510. http://dx.doi.org/10.11591/ijpeds.v10.i3.pp1510-1519.

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Increased harmonic content and low power factor in power systems caused by power converters have been of great concern. To overcome this, several converter topologies employing advanced semiconductor devices and control schemes have been proposed. The aim of this paper is to identify a low cost, small size, efficient and reliable ac to dc converter to meet the input performance index of uninterrupted power supply. In this paper, comparison between three converters namely AC-DC Cuk rectifier, Fly back converter & Interleaved SEPIC converter have been carried out. For the above converters both bridged and bridgeless topologies have been analysed. The working of all the three types of converter has been illustrated with relevant waveforms followed by the simulation results. Comparison of the three converters have been done based on the parameters namely Displacement Factor, Supply Power Factor& supply THD. The results are verified.

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Fotso Mbobda, Christophe Raoul, and Alain Moise Dikandé. "A dual-switch cubic SEPIC converter with extra high voltage gain." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 1 (March 1, 2021): 199. http://dx.doi.org/10.11591/ijpeds.v12.i1.pp199-211.

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To provide a high votage conversion ratio, conventional non-isolated DC-DC boost topologies, which have reduced voltage boost capability, have to operate with extremely high duty cycle ratio, higher than 0.9. This paper proposes a DC-DC converter which is mainly based on the narrow range of duty cycle ratio to achieve extra high voltage conversion gain at relatively reduced voltage stress on semiconductors. In addition, it does include any magnetic coupling structure. The structure of the proposed converter combines the new hybrid SEPIC converter and voltage multiplier cells. From the steady-state analysis, this converter has wide conversion ratio and cubic dependence with respect to the duty ratio and then, can increase the output voltage several times more than the conventional and quadratic converters at the same duty cycle ratio. However, the proposed dual-switch cubic SEPIC converter must withstand higher voltage stress on output switches. To overcome this drawback, an extension of the proposed converter is also introduced and discussed. The superiority of the proposed converter is mainly based on its cubic dependence on the duty cycle ratio that allows it to achieve extra high voltage gain at reduced voltage stress on semiconductors. Simulation results are shown and they corroborate the feasibility, practicality and validity of the concepts of the proposed converter.

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Zhang, Hao, Min Jing, Shuai Dong, Dachu Dong, Ye Liu, and Yongpeng Meng. "Stability and Evolutionary Trend of Hopf Bifurcations in Double-Input SEPIC DC–DC Converters." International Journal of Bifurcation and Chaos 29, no. 14 (December 26, 2019): 1950192. http://dx.doi.org/10.1142/s021812741950192x.

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In this paper, the stability and evolutionary trend of Hopf bifurcations are investigated thoroughly for the double-input SEPIC DC–DC converter with one-cycle control (OCC), which is widely used in hybrid power systems. By means of cycle-by-cycle simulations, the evolutionary trend of bifurcation behaviors is identified. The inherent mechanisms of two types of bidirectional Hopf bifurcations are uncovered based on the proposed averaged model. Moreover, stability boundaries in the parameter space are derived with the help of eigenvalue analysis to optimize the circuit design. Furthermore, some important indices with respect to coupling effects are evaluated to assess the coupling effects in the system. Finally, PSpice circuit experiments are performed to verify the bifurcation analysis.

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González-Castaño, Catalina, Carlos Restrepo, Fredy Sanz, Andrii Chub, and Roberto Giral. "DC Voltage Sensorless Predictive Control of a High-Efficiency PFC Single-Phase Rectifier Based on the Versatile Buck-Boost Converter." Sensors 21, no. 15 (July 28, 2021): 5107. http://dx.doi.org/10.3390/s21155107.

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Many electronic power distribution systems have strong needs for highly efficient AC-DC conversion that can be satisfied by using a buck-boost converter at the core of the power factor correction (PFC) stage. These converters can regulate the input voltage in a wide range with reduced efforts compared to other solutions. As a result, buck-boost converters could potentially improve the efficiency in applications requiring DC voltages lower than the peak grid voltage. This paper compares SEPIC, noninverting, and versatile buck-boost converters as PFC single-phase rectifiers. The converters are designed for an output voltage of 200 V and an rms input voltage of 220 V at 3.2 kW. The PFC uses an inner discrete-time predictive current control loop with an output voltage regulator based on a sensorless strategy. A PLECS thermal simulation is performed to obtain the power conversion efficiency results for the buck-boost converters considered. Thermal simulations show that the versatile buck-boost (VBB) converter, currently unexplored for this application, can provide higher power conversion efficiency than SEPIC and non-inverting buck-boost converters. Finally, a hardware-in-the-loop (HIL) real-time simulation for the VBB converter is performed using a PLECS RT Box 1 device. At the same time, the proposed controller is built and then flashed to a low-cost digital signal controller (DSC), which corresponds to the Texas Instruments LAUNCHXL-F28069M evaluation board. The HIL real-time results verify the correctness of the theoretical analysis and the effectiveness of the proposed architecture to operate with high power conversion efficiency and to regulate the DC output voltage without sensing it while the sinusoidal input current is perfectly in-phase with the grid voltage.

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SHI, ZHANGHAI, K. W. ERIC CHENG, and S. L. Ho. "BOUNDARY CONDITION ANALYSIS FOR CUK, SEPIC AND ZETA CONVERTERS USING ENERGY FACTOR CONCEPT." Journal of Circuits, Systems and Computers 22, no. 01 (January 2013): 1250067. http://dx.doi.org/10.1142/s0218126612500673.

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This paper aims to use the concept of energy factor and its associated concepts to analyze high-order converters, such as Cuk, Sepic and Zeta converters. The maximum variation of energy factor (MVEF) of high-order converters exhibits particular characteristic which is different from that of second order converters. To carry out the analysis based on MVEF, boundary conditions for the high-order converters should be restudied. There are new boundary conditions that are derived by analyzing the energy factor. Through the research in this paper, it can be concluded that the MVEF can reveal the amount of energy storage and impact the efficiency of high-order converters. Experimental results have confirmed that the MVEF and efficiency are correlated. MVEF can be a preferred index for DC-DC converters including high-order converters.

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Mani, Gopinath, and G. Gopu. "Closed Loop Analysis of Bridgeless SEPIC Converter for Drive Application." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 2 (June 1, 2015): 253. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp253-259.

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In this paper closed loop analysis of Single phase AC-DC Bridgeless Single Ended Primary Inductance Converter (SEPIC) for Power Factor Correction (PFC) rectifier is analyzed. In this topology the absence of an input diode bridge and the due to presence of two semiconductor switches in the current flowing path during each switching cycle which will results in lesser conduction losses and improved thermal management compared to the conventional converters. In this paper the operational principles, Frequency analysis, and design equations of the proposed converter are described in detail. Performance of the proposed SEPIC PFC rectifier are carried out using Matlab Simulink software and results are presented.

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Muthukumari, T., T. A. Raghavendiran, R. Kalaivani, and P. Selvaraj. "Intelligent tuned PID controller for wind energy conversion system with permanent magnet synchronous generator and AC-DC-AC converters." IAES International Journal of Robotics and Automation (IJRA) 8, no. 2 (June 1, 2019): 133. http://dx.doi.org/10.11591/ijra.v8i2.pp133-145.

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This paper presents the intelligent tuned PID controller-based Single Ended Primary Inductor Converter (SEPIC) for Maximum Power Point Tracking (MPPT) operation of Wind Energy Conversion System (WECS). As the voltage and frequency of the Permanent Magnet Synchronous Generator (PMSG) varies with the wind speed changes, Intelligent controlled SEPIC is utilized to maintain the constant DC link voltage. The intelligent tuned PID controller combines the advantages of both conventional and soft controllers. The 1.5MW variable speed WECS (VSWECS) with AC-DC-AC converter is developed using MATLAB/Simulink software. PMSG delivers a load/utility grid through an uncontrolled diode rectifier, intelligent controlled SEPIC and three phase inverter. The real time implementation of the proposed system is done by the DSP processor MSP430F5529. The performance of the SEPIC is tested in both simulation and experiment at different wind speed conditions. The performance of the proposed Intelligent MPPT control of SEPIC are compared with the conventional PID controller. Intelligent tuning of PID controller such as Fuzzy-PID, and ANFIS-PID is implemented in the proposed system and results are compared. The simulation and experimental results reveals that the proposed ANFIS method provide improved performance than the conventional PID method in terms of power quality.

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Mondal, Santanu, and Madhurima Chattopadhyay. "Comparative study of three different bridge-less converters for reduction of harmonic distortion in brushless DC motor." Indonesian Journal of Electrical Engineering and Computer Science 20, no. 3 (December 1, 2020): 1185. http://dx.doi.org/10.11591/ijeecs.v20.i3.pp1185-1193.

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This paper represents a comparative study of three different types of DC-DC converter that can be used for reduction of Total Harmonic Distortion (THD) in stator current, back electromotive force (EMF) and torque of brush less DC motor. In addition, the topologies of these converters are analysed, and the THD of the output characteristics have also been studied. In this work, SEPIC, Zeta and Flyback converters are considered and their outputs are fed to the BLDCM with the help of universal bridge or six step inverter. Moreover the THD of the output voltages are not only measured for three converters but also reduced by tuning the parameters. At first these three converters are modeled in MATLAB/ Simulink based simulation platform and studied the performance individually and further executed with hardware circuitry. Finally the output parameters from both software simulation and real time hardware are compared for these three converters separately and got satisfactory similar results. Again we studied the performance with these converters in terms of efficiency while fed in the commutation drive circuitry of BLDCM by considering minimum THD. From this comparative simulation results, it has been observed that Zeta converter showed maximum efficiency. Therefore, in real time hardware implementation, the commutation drive circuitry of BLDCM is studied with Zeta converter. With this configuration, a comparatively low THD of stator current, back EMF and electromagnetic torque have been achieved in BLDCM with PID controller.

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Bharathi, M. L. "Comparison of Solar Powerd SEPIC, ZETA and ILBC Converters Fed DC Drives." Indian Journal of Science and Technology 8, S7 (April 1, 2015): 247. http://dx.doi.org/10.17485/ijst/2015/v8is7/67042.

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Jagadish Kumar, B., and Dr Basavaraja Banakara. "Certain investigations on multi input –SEPIC-RE boost-system with enhanced-response." International Journal of Engineering & Technology 7, no. 4 (September 26, 2018): 2718. http://dx.doi.org/10.14419/ijet.v7i4.15678.

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Recent developments in converters have given pathway to high-gain-step up converter having low output voltage ripple. High-gain-step up converters can be found between Photovoltaic Voltage (PV) and Direct-Current (D-C) loads. The intention of this work is to identify multi converter system for multiple input sources and to improve time response of high-gain-step up-converter. Closed-loop Multi-Converter System (MCS) is utilized to regulate load voltage. This effort recommends suitable-controller for “closed-loop-controlled-SEPIC-REBOOST Converter fed DC motor”. The estimation of the yield in ‘open-loop’&‘closed- loop-circuit’ has been done using MATLAB or Simulink. Closed-loop-control of MCS with PI and FOPID-Controllers are investigated and their responses are evaluated in conditions of rise time, peak time, settling time and steady state error. It is seen that FOPID controlled MCS gives better time domain response in terms of motor speed. A ‘Prototype of MCS’ has been fabricated in the laboratory& the ‘experimental-results’ are authenticated with the simulation-results.

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Garriga-Castillo, Juan A., Hugo Valderrama-Blavi, José A. Barrado-Rodrigo, and Àngel Cid-Pastor. "Analysis of Sliding-Mode Controlled Impedance Matching Circuits for Inductive Harvesting Devices." Energies 12, no. 20 (October 12, 2019): 3858. http://dx.doi.org/10.3390/en12203858.

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A sea-wave energy harvesting, articulated device is presented in this work. This hand-made, wooden device is made combining the coil windings of an array of three single transducers. Taking advantage of the sea waves sway, a linear oscillating motion is produced in each transducer generating an electric pulse. Magnetic fundamentals are used to deduce the electrical model of a single transducer, a solenoid-magnet device, and after the model of the whole harvesting array. The energy obtained is stored in a battery and is used to supply a stand-alone system pay-load, for instance a telecom relay or weather station. To maximize the harvested energy, an impedance matching circuit between the generator array and the system battery is required. Two dc-to-dc converters, a buck-boost hybrid cell and a Sepic converter are proposed as impedance adaptors. To achieve this purpose, sliding mode control laws are introduced to impose a loss free resistor behavior to the converters. Although some converters operating at discontinuous conduction mode, like the buck-boost converter, can exhibit also this loss free resistor behavior, they usually require a small input voltage variation range. By means of sliding mode control the loss free resistor behavior can be assured for any range of input voltage variation. After the theoretical analysis, several simulation and experimental results to compare both converters performance are given.

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Şuşcă, Mircea, Vlad Mihaly, Mihai Stănese, Dora Morar, and Petru Dobra. "Unified CACSD Toolbox for Hybrid Simulation and Robust Controller Synthesis with Applications in DC-to-DC Power Converter Control." Mathematics 9, no. 7 (March 28, 2021): 731. http://dx.doi.org/10.3390/math9070731.

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The current article presents the design, implementation, validation, and use of a Computer-Aided Control System Design (CACSD) toolbox for nonlinear and hybrid system uncertainty modeling, simulation, and control using μ synthesis. Remarkable features include generalization of classical system interconnection operations to nonlinear and hybrid systems, automatic computation of equilibrium points for nonlinear systems, and optimization of least conservative uncertainty bounds, with direct applicability for μ synthesis. A unified approach is presented for the step-down (buck), step-up (boost), and single-ended primary-inductor (SEPIC) converters to showcase the use and flexibility of the toolbox. Robust controllers were computed by minimization of the H∞ norm of the augmented performance systems, encompassing a wide range of uncertainty types, and have been designed using the well-known mixed-sensitivity closed loop shaping μ synthesis method.

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Karthikeyan, M., R. Elavarasu, P. Ramesh, C. Bharatiraja, P. Sanjeevikumar, Lucian Mihet-Popa, and Massimo Mitolo. "A Hybridization of Cuk and Boost Converter Using Single Switch with Higher Voltage Gain Compatibility." Energies 13, no. 9 (May 6, 2020): 2312. http://dx.doi.org/10.3390/en13092312.

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In the current era, the desire for high boost DC-to-DC converter development has increased. Notably, there has been voltage gain improvement without adding extra power switches, and a large number of passive components have advanced. Magnetically coupled isolated converters are suggested for the higher voltage gain. These converters use large size inductors, and thus the non-isolated traditional boost, Cuk and Sepic converters are modified to increase their gain by adding an extra switch, inductors and capacitors. These converters increase circuit complexity and become bulky. In this paper, we present a hybrid high voltage gain non-isolated single switch converter for photovoltaic applications. The proposed converter connects the standard conventional Cuk and boost converter in parallel for providing continuous current mode operation with the help of a single power switch, which gives less voltage stress on controlled switch and diodes. The proposed hybrid topology uses a single switch with a lower component-count and provides a higher voltage gain than non-isolated traditional converters. The converter circuit mode of operation, operating performance, mathematical derivations and steady-state exploration and circuit parameters design procedures are deliberated in detail. The proposed hybrid converter circuit components, voltage gain and performance, were compared with other topologies in the literature. The MATLAB/Simulink simulation study and microcontroller-based experimental laboratory prototype of 150 W were implemented. The simulation study and experimentation results were confirmed to be a satisfactory agreement with the theoretical analysis. This topology produced non-inverting output in continuous input current mode using a single switch with high voltage gain (≈5.116 gain) with a maximum efficiency of 92.2% under full load.

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Babenko, V. P., and V. K. Bityukov. "Energy and noise characteristics of a SEPIC buck-boost converter with unipolar and bipolar output." Russian Technological Journal 9, no. 4 (August 26, 2021): 9–19. http://dx.doi.org/10.32362/2500-316x-2021-9-4-9-19.

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Some advantages of the SEPIC buck-boost converter makes it stand out from other configurations. It makes possible to obtain from a unipolar input voltage both unipolar and bipolar output voltage with a good symmetry between positive and negative output voltages. It also provides efficient performance as well as circuit simplicity in unipolar and bipolar topology owing to the use of a single switch which can be operated by available integrated controllers of boost converters. The article considers the topologies of a SEPIC buck-boost converter built according to the traditional scheme (with two inductors) and according to the scheme on magnetically coupled chokes. To analyze the processes and factors affecting the converter operation efficiency, a circuit simulation has been done using the Electronics Workbench. The results of the investigation of a pulsed DC converter of input voltage to unipolar or bipolar output voltage using SEPIC buck-boost topology are presented. The circuit simulation enables to specify the switching process characteristics, to estimate the ripple level of the input current and its spectral characteristics, and to develop recommendations concerning the choice of parameters of converters elements and generation of control signals. Based on the simulation results, the load, control, and noise characteristics of the converter are obtained. The level of symmetry of positive and negative output voltage is investigated for the converter on discrete and magnetically coupled chokes. The assessment of the effect of leakage inductance on converters with magnetic coupling of inductive elements is given. Examples of practical implementation of converters built according to the SEPIC topology are shown. It is found that the resistance of the choke windings, which is less than 0.5 Ohm, has practically no effect on the efficiency of the converter, retaining the factor of about 0.9 in a wide range of load currents, while the main source of conversion losses is a passive diode switch. Synchronous converter circuits of a number of manufacturers are more efficient, but require more complex controllers for active switches with elements for protection against through currents.

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V. Kassick, Enio. "Deriving The Canonical Equivalent Circuit For Small Signal & Low Frequency Ac Model For The Sepic And Zeta Pwm Dc-dc Converters With Two-port Network (quadripoles) Circuit Analysis Technique." Eletrônica de Potência 16, no. 4 (November 1, 2011): 376–82. http://dx.doi.org/10.18618/rep.20114.376382.

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Rosa, Arthur, Matheus Silva, Marcos Campos, Renato Santana, Welbert Rodrigues, Lenin Morais, and Seleme Jr. "SHIL and DHIL Simulations of Nonlinear Control Methods Applied for Power Converters Using Embedded Systems." Electronics 7, no. 10 (October 6, 2018): 241. http://dx.doi.org/10.3390/electronics7100241.

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In this work, a new real-time Simulation method is designed for nonlinear control techniques applied to power converters. We propose two different implementations: in the first one (Single Hardware in The Loop: SHIL), both model and control laws are inserted in the same Digital Signal Processor (DSP), and in the second approach (Double Hardware in The Loop: DHIL), the equations are loaded in different embedded systems. With this methodology, linear and nonlinear control techniques can be designed and compared in a quick and cheap real-time realization of the proposed systems, ideal for both students and engineers who are interested in learning and validating converters performance. The methodology can be applied to buck, boost, buck-boost, flyback, SEPIC and 3-phase AC-DC boost converters showing that the new and high performance embedded systems can evaluate distinct nonlinear controllers. The approach is done using matlab-simulink over commodity Texas Instruments Digital Signal Processors (TI-DSPs). The main purpose is to demonstrate the feasibility of proposed real-time implementations without using expensive HIL systems such as Opal-RT and Typhoon-HL.

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., Reeto Jose K. "DC-DC SEPIC CONVERTER TOPOLOGIES." International Journal of Research in Engineering and Technology 04, no. 05 (May 25, 2015): 20–23. http://dx.doi.org/10.15623/ijret.2015.0405004.

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Gomes de Assis, Bruno, Eduardo Pacheco Carreiro Braga, Claudinor Bitencourt Nascimento, and Eloi Agostini Junior. "High-Voltage-Gain Integrated Boost-SEPIC DC-DC Converter for Renewable Energy Applications." Eletrônica de Potência 24, no. 3 (September 30, 2019): 336–44. http://dx.doi.org/10.18618/rep.2019.3.0025.

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Janarthanan, S. K., and C. Kathirvel. "Multi Input Modified DC-DC SEPIC Converter based Grid Connected System Using MPPT Algorithm." Journal of Advanced Research in Dynamical and Control Systems 11, no. 12-SPECIAL ISSUE (December 31, 2019): 527–35. http://dx.doi.org/10.5373/jardcs/v11sp12/20193248.

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R., Sasikala. "Interleaved Sepic Bridgeless AC-DC Converter for PFC Applications." Journal of Advanced Research in Dynamical and Control Systems 12, no. 01-Special Issue (February 13, 2020): 593–600. http://dx.doi.org/10.5373/jardcs/v12sp1/20201108.

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KJ, Sinu, and G. Ranganathan. "A Novel Hydro Powered Online Power Converter for Marine Lighting Applications." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (January 1, 2018): 15. http://dx.doi.org/10.11591/ijeecs.v9.i1.pp15-19.

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This paper presents a new hydro energy based dc-dc PFC sepic based buck converter for marine lighting applications. The major advantage of the proposed power converter is high power factor and low THD with higher efficiency. SEPIC converter produces continuous smooth ripple free current because of two inductors in series in line in its circuit. Sepic converter produces lower switching losses because of lower voltage stress on power switch employed compared to other buck-boost converter topologies. Tidal wave energy is converted into mechanical energy with the help of a hydro turbine which drives a permanent magnet synchronous generator to produce three phase ac output voltage. It produces a low ac voltage which is converted into DC using passive diode rectifier and fed to sepic converter for voltage regulation as well as to improve quality of power supply such as high power factor, low THD. The proposed sepic based power converter for marine lighting application is simulated in MATLAB/Simulink environment for verifying the performance of proposed scheme.

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Siwakoti, Yam P., Ali Mostaan, Ahmed Abdelhakim, Pooya Davari, Mohsen N. Soltani, Md Noman Habib Khan, Li Li, and Frede Blaabjerg. "High-Voltage Gain Quasi-SEPIC DC–DC Converter." IEEE Journal of Emerging and Selected Topics in Power Electronics 7, no. 2 (June 2019): 1243–57. http://dx.doi.org/10.1109/jestpe.2018.2859425.

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Kavitha, Anbukumar, and Govindarajan Uma. "Control of chaos in SEPIC DC-DC converter." International Journal of Control, Automation and Systems 8, no. 6 (December 2010): 1320–29. http://dx.doi.org/10.1007/s12555-010-0618-5.

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Vinícius Mosconi Ewerling, Marcos, Telles Brunelli Lazzarin, and Carlos Henrique Illa Font. "ISOLATED DC-DC SEPIC CONVERTER WITH REDUCED VOLTAGE STRESS ON SEMICONDUCTORS." Eletrônica de Potência 25, no. 4 (November 17, 2020): 1–11. http://dx.doi.org/10.18618/rep.2020.4.0041.

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Jozwik, J. J., and M. K. Kazimierczuk. "Dual sepic PWM switching-mode DC/DC power converter." IEEE Transactions on Industrial Electronics 36, no. 1 (1989): 64–70. http://dx.doi.org/10.1109/41.20346.

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Oudda, Meryem, and Abdeldjebar Hazzab. "Photovoltaic System with SEPIC Converter Controlled by the Fuzzy Logic." International Journal of Power Electronics and Drive Systems (IJPEDS) 7, no. 4 (December 1, 2016): 1283. http://dx.doi.org/10.11591/ijpeds.v7.i4.pp1283-1293.

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In this work, a fuzzy logic controller is used to control the output voltage of a photovoltaic system with a DC-DC converter; type Single Ended Primary Inductor Converter (SEPIC). The system is designed for 210 W solar PV (SCHOTT 210) panel and to feed an average demand of 78 W. This system includes solar panels, SEPIC converter and fuzzy logic controller. The SEPIC converter provides a constant DC bus voltage and its duty cycle controlled by the fuzzy logic controller which is needed to improve PV panel’s utilization efficiency. A fuzzy logic controller (FLC) is also used to generate the PWM signal for the SEPIC converter.

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SP, Sivakumar. "Isolated Current-Fed Ac to Dc with Sepic Converter for Electric Vehicle Applications." International Journal of Psychosocial Rehabilitation 23, no. 4 (December 20, 2019): 616–26. http://dx.doi.org/10.37200/ijpr/v23i4/pr190396.

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Alhamrouni, Ibrahim, M. K. Rahmat, F. A. Ismail, Mohamed Salem, Awang Jusoh, and T. Sutikno. "Design and development of SEPIC DC-DC boost converter for photovoltaic application." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 1 (March 1, 2019): 406. http://dx.doi.org/10.11591/ijpeds.v10.i1.pp406-413.

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This study highlights a new construction of SEPIC DC-DC converter. The proposed converter aims for some features such as high voltage gain, continuous input current and reduce stress on the power switch. In addition, the circuit construction ensurs the simplicity in design along with signicant cost saving, since its components are readily available and smaller in size compared to the off-shelf components. This type of converter can adjust the DC voltage to maintain its output voltage to be constant. Typically, SEPIC operated in equipment that uses battery and also in wide range input voltage DC power supply. The converter is designed for renewable energy application where it is able to regulate the output voltage of the Photovoltaic (PV). The converter has been analysed based on different switching frequencies and duty cycle. Thus the outcome of the proposed converter can be achieved by using D=0.45 and fs=30 kHz. The proposed converter is supplied by 26V as an input voltage and produces 300V output and gives 94% of efficiency.

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Journal articles on the topic 'DC-DC SEPIC converters'

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