Journal articles: 'Single-ended primary-inductor converter (SEPIC)'

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Sutikno, Tole, Rizky Ajie Aprilianto, Nik Rumzi Nik Idris, and Ahmad Saudi Samosir. "Performance numerical evaluation of modified single-ended primary-inductor converter for photovoltaic systems." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 4 (2023): 3720. http://dx.doi.org/10.11591/ijece.v13i4.pp3720-3732.

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Single-ended primary-inductor converter (SEPIC) was considered a good alternative to a DC-DC converter for photovoltaic (PV) systems. The SEPIC converter can operate with an input voltage greater or less than the regulated output voltage, or as a step-up or step-down. As a step-up converter, SEPIC boosts PV voltage to specific levels. However, gain limitation and voltage stress continue to reduce the efficiency of conventional SEPIC converters. Because of this, researchers created a modified SEPIC converter to improve performance. In this paper, six modified SEPIC converters were compared and evaluated. To compare fairly, all modified SEPIC converters are non-isolated and use a single switch. Power simulator (PSIM) software was used to simulate each converter with a BISOL BMO-250 PV module and maximum power point tracking (MPPT) P&amp;O controller. The converter with the highest static voltage gain and lowest duty cycle has been identified. It results in up to ten times voltage increment with a 0.8-duty ratio. All topologies have the same voltage stress, with maximum and minimum values of 30.1 and 29.5 V, respectively. On the other hand, each topology produces different average efficiencies, with the highest and lowest efficiency at 99.5% and 97.2%, respectively.

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Tole, Sutikno, Ajie Aprilianto Rizky, Rumzi Nik Idris Nik, and Saudi Samosir Ahmad. "Performance numerical evaluation of modified single-ended primary-inductor converter for photovoltaic systems." International Journal of Electrical and Computer Engineering (IJECE) 13, no. 4 (2023): 3720–32. https://doi.org/10.11591/ijece.v13i4.pp3720-3732.

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Single-ended primary-inductor converter (SEPIC) was considered a good alternative to a DC-DC converter for photovoltaic (PV) systems. The SEPIC converter can operate with an input voltage greater or less than the regulated output voltage, or as a step-up or step-down. As a step-up converter, SEPIC boosts PV voltage to specific levels. However, gain limitation and voltage stress continue to reduce the efficiency of conventional SEPIC converters. Because of this, researchers created a modified SEPIC converter to improve performance. In this paper, six modified SEPIC converters were compared and evaluated. To compare fairly, all modified SEPIC converters are nonisolated and use a single switch. Power simulator (PSIM) software was used to simulate each converter with a BISOL BMO-250 PV module and maximum power point tracking (MPPT) P&O controller. The converter with the highest static voltage gain and lowest duty cycle has been identified. It results in up to ten times voltage increment with a 0.8-duty ratio. All topologies have the same voltage stress, with maximum and minimum values of 30.1 and 29.5 V, respectively. On the other hand, each topology produces different average efficiencies, with the highest and lowest efficiency at 99.5% and 97.2%, respectively.

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Do, Hyun Lark. "Non-Isolated Single-Switch Step Up/Down Converter with Wide Conversion Range." Advanced Materials Research 424-425 (January 2012): 777–79. http://dx.doi.org/10.4028/www.scientific.net/amr.424-425.777.

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A non-isolated single-switch step up/down converter with wide conversion range is proposed in this paper. In the porposed converter, a boost converter and a single-ended primary inductor converter (SEPIC) are connected in cascade. Due to the cascade connection of a boost converter and SEPIC, wide conversion range is achieved. By utilizing a single switch, a complex control circuitry problem of conventional cascade converters is solved. The boost converter at the input stage can provide a continuous input current. The operation principle and steady-state analysis of the proposed converter are provided. A prototype of the proposed converter is developed, and its experimental results are presented for validation

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Veenalakshmi, S., P. Nedumal Pugazhenthi, and S. Selvaperumal. "Modeling and PID Control of Single Switch Bridgeless SEPIC PFC Converter." Applied Mechanics and Materials 573 (June 2014): 161–66. http://dx.doi.org/10.4028/www.scientific.net/amm.573.161.

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This paper proposes the modeling of Single Ended Primary Inductor Converter (SEPIC) for Power Factor Correction (PFC) and PID control for the converter using various tuning methods. The SEPIC is capable of operating from an input voltage that is greater or less than the regulated output voltage. A small signal dynamic model for SEPIC PFC converter is obtained using state space averaging technique which provides a fifth order transfer function. The complete model of the converter is simulated using MATLAB (SIMULINK). Then the PID controller is designed for the SEPIC PFC converter and various tuning methods were adopted using SISO tool in MATLAB.

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Journal, IJSREM. "A Review on Control Methods of SEPIC Converters." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 07, no. 10 (2023): 1–11. http://dx.doi.org/10.55041/ijsrem26064.

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In recent years, electric vehicles have witnessed a surge in popularity due to their energy-saving and eco-friendly attributes. Unlike conventional internal combustion engine vehicles, electric vehicles exhibit superior performance and operational efficiency. Within the realm of modern electric vehicles, power electronic circuits, notably including DC-DC converters, play a pivotal role. Among these converters, single- ended primary-inductor converters (SEPIC) find extensive use in scenarios where minimizing input and output ripple currents is essential. The primary objective of this project is to conceive and put into action advanced controllers for SEPIC converters, catering to a diverse range of applications, encompassing battery-powered devices, solar energy systems, and LED lighting systems. Key Words: DC-DC converter, SEPIC converter, PID, SMC, ASMC, Fuzzy logic Control.

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Rai, Nor Akmal, Mohd Junaidi Abdul Aziz, Mohd Rodhi Sahid, and Shahrin Md Ayob. "Bridgeless PFC single ended primary inductance converter in continuous current mode." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 3 (2019): 1427. http://dx.doi.org/10.11591/ijpeds.v10.i3.pp1427-1436.

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This paper presents bridgeless single ended primary inductor (SEPIC) converter operated in continuous conduction mode (CCM). The converter used in the study offers a lesser conduction loss compared to the other bridgeless SEPIC converter. In order to regulate the required output current and output voltage with high efficiency while achieving high power factor correction (PFC) at the input side, average current mode control (ACMC) is applied. The model is simulated using MATLAB/Simulink and it is found that the converter and the proposed control strategy provide a promising result. The preliminary results obtained from the experimental test-rig shows a good agreement as in simulation. The theoretical analysis of the proposed controller is verified on an output 100V to 300W prototype.

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Nor, Akmal Rai, Junaidi Abdul Aziz Mohd, Rodhi Sahid Mohd, and Rodhi Sahid Mohd. "Bridgeless PFC single ended primary inductance converter in continuous current mode." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 3 (2019): 1427–36. https://doi.org/10.11591/ijpeds.v10.i3.pp1427-1436.

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This paper presents bridgeless single ended primary inductor (SEPIC) converter operated in continuous conduction mode (CCM). The converter used in the study offers a lesser conduction loss compared to the other bridgeless SEPIC converter. In order to regulate the required output current and output voltage with high efficiency while achieving high power factor correction (PFC) at the input side, average current mode control (ACMC) is applied. The model is simulated using MATLAB/Simulink and it is found that the converter and the proposed control strategy provide a promising result. The preliminary results obtained from the experimental test-rig shows a good agreement as in simulation. The theoretical analysis of the proposed controller is verified on an output 100V to 300W prototype.

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Do, Hyun Lark. "Bridgeless SEPIC PFC Converter." Applied Mechanics and Materials 313-314 (March 2013): 51–54. http://dx.doi.org/10.4028/www.scientific.net/amm.313-314.51.

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A new bridgeless powerfactor correction (PFC) converter is proposed in this paper. The proposed converter isbased on single-ended primary inductor converter (SEPIC). In the proposed converter, conductionlosses are reduced and efficiency is improved by eliminating bridge diodes. In addition, input currentripple is significantly reduced by utilizing coupled inductors. Like a conventional SEPIC PFCconverter, the proposed converter provides almost unity power factor (PF). Steady-state analysis ofthe proposed converter is performed. Experimental results based on a prototype are alsoprovided to verify the effectiveness and feasibility of the proposed converter.

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Mahmood, Adil Hasan, Mustafa F. Mohammed, Mohammed Omar, and Ali H. Ahmad. "Single phase inverter fed through a regulated SEPIC converter." Bulletin of Electrical Engineering and Informatics 10, no. 6 (2021): 2921–28. http://dx.doi.org/10.11591/eei.v10i6.2853.

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In power electronics, it is necessary to select the best converter circuit topology that has good performance among different converters. The single-ended primary inductor converter (SEPIC) has good performance and is advantageous among different direct current/direct current (DC/DC) converters. In this paper, a design of a SEPIC converter is made by selecting the values of its components according to the required output voltage and power. The design is made by an assumption that both of its inductors have the same value. The converter is tested by using MATLAB Simulink successfully. Later, its output voltage is regulated by using a proportional integral (PI-controller) through tuning its proportional and integral gains. Finally, the SEPIC converter is connected to a single-phase full-bridge inverter to supply its required DC voltage. The role of the SEPIC converter is to regulate the dc-link voltage between its output side and the inverter. The results showed the success of this connection to supply alternating current (AC) loads with low total harmonic distortion (THD).

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Kasasbeh, Abdalkreem, Burak Kelleci, Salih Baris Ozturk, Ahmet Aksoz, and Omar Hegazy. "SEPIC Converter with an LC Regenerative Snubber for EV Applications." Energies 13, no. 21 (2020): 5765. http://dx.doi.org/10.3390/en13215765.

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A Single-Ended Primary-Inductor Converter (SEPIC) converter with an Inductor-Capacitor (LC) regenerative snubber is proposed to reduce Electromagnetic Interference (EMI) for Electric Vehicle (EV) applications. The switching energy is transferred through a capacitor to an inductor which is coupled to SEPIC inductors. This technique reduces the number of components and also returns some of switching energy to SEPIC converter. The mathematical analysis and optimization of LC snubber with respect to number of turns is also presented. Spice simulations and experimental results are provided to verify its performance. The proposed LC regenerative snubber reduces the peak voltage by 16 V on the switching transistor during the switching transient. It is also indicated that 8 dB reduction is achieved in the EMI measurements at ringing frequency and 10 dB reduction at high frequency band.

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Et.al, Dr SP Umayal. "Single Ended Primary Inductor Converter for Delta Conversion of PV Systems." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 3 (2021): 4610–20. http://dx.doi.org/10.17762/turcomat.v12i3.1862.

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Electrical Energy can be generated by Photovoltaic (PV) systems. To achieve desired power range PV modules are connected both in series and parallel. There will be a difference between output power between PV cells, modules due to temporary shading, pollution or spread in cell behaviour. PV output power will be reduced due to this. In this paper in order to get the same output power during such condition delta conversion concept is introduced with the help of a DC/DC SEPIC converter. This is a converter capable of averaging out the difference existing in output power between PV cells, modules existing in PV system. The converter is simulated in MATLAB software and the results obtained are compared with the prototype hardware results.

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A.Ezhilarasi and Ramaswamy M. "Variable Structure Controller for Chaos Elimination in a Single Ended Primary Inductance Converter." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 5 (2020): 503–10. https://doi.org/10.35940/ijeat.E9687.069520.

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The paper attempts to off-set the circuit parasitics and the inherent switching nature of the power switch in a SEPIC (Single Ended Primary Inductance Converter) that eclipses its performance from theoretical predictions. The focus orients to design a control strategy that offers a chaotic free operation of the SEPIC. It envisages the use of a Variable Structure Control (VSC) strategy to irradiate the adverse effects of non-linear dynamics and assuage the operating range of the converter. The scheme projects the creation and elimination of this nonlinear property through time domain waveforms and phase portraits. The methodology underscores the theory to ensure an uniform rate of charging and discharging for the inductor current during the process of the converter operating the load. The scheme realizes the benefits of the mechanism through a correlation between the open and closed loop inductor current time domain waveform, with the help of adjustments in the parametric variations. The effort involves evaluating the performance using MATLAB simulation and experimental validation in a DSPIC (Digital signal peripheral interface controller) environment to illustrate its suitability for practical applications.

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Anuradha, C., N. Chellammal, Md Saquib Maqsood, and S. Vijayalakshmi. "Design and Analysis of Non-Isolated Three-Port SEPIC Converter for Integrating Renewable Energy Sources." Energies 12, no. 2 (2019): 221. http://dx.doi.org/10.3390/en12020221.

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An efficient way of synthesizing a three port non-isolated converter from a single-ended primary inductor converter (SEPIC) is proposed in this paper. The primary SEPIC converter is split into a source cell and a load cell. Two such source cells are integrated through direct current (DC) link capacitors with a common load cell to generate a three-port SEPIC converter. The derived converter features single-stage power conversion with reduced structural complexity and bidirectional power flow capability. For bidirectional power flow, it incorporates a battery along with an auxiliary photovoltaic source. Mathematical analyses were carried out to describe the operating principles and design considerations. Experiments were performed on an in-house-built prototype three-port unidirectional converter, and the results are presented to validate the feasibility of the designed converter.

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Aljafari, Belqasem, Gunapriya Devarajan, Selvi Arumugam, and Indragandhi Vairavasundaram. "Design and Implementation of Hybrid PV/Battery-Based Improved Single-Ended Primary-Inductor Converter-Fed Hybrid Electric Vehicle." International Transactions on Electrical Energy Systems 2022 (August 28, 2022): 1–11. http://dx.doi.org/10.1155/2022/2934167.

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In order to enhance the power transformation stage’s power transfer capabilities and efficiency, in this article, improved three-port two step-up single-ended primary-inductor converters (SEPIC) converter fed (Photovoltaic )PV- Hybrid Electric Vehicle was proposed. In comparison to the standard single-stage SEPIC, the proposed converter accepts a wider range of input voltages. The proposed three-port converter uses a multiple-winding high-frequency transformer (HFT) to integrate the dual sources and provide greater voltage gain with lesser elements. Furthermore, by predicting the drive torque need, the power management algorithm (PMA) included with the proposed PV-hybrid electric vehicle (HEV) minimizes the drive motor’s power consumption. An experimental model with a power output of 6 kW and a voltage range of 12 to 600 volts has been created and tested. The designed model has 94.11% efficiency.

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Anuradha, C., C. Sakthivel, T. Venkatesan, and N. Chellammal. "Analysis of Non-Isolated Multi-Port Single Ended Primary Inductor Converter for Standalone Applications." Energies 11, no. 3 (2018): 539. http://dx.doi.org/10.3390/en11030539.

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A non-isolated Multiport Single Ended Primary Inductor Converter (SEPIC) for coordinating photovoltaic sources is developed in this paper. The proposed multiport converter topologies comprise a Single Input Multi yield (SIMO) and Multi Input Multi Output (MIMO). It is having the merits of decreased number of parts and high power density. Steady state analysis verifies the improved situation of both the proposed topologies, which is further checked through simulation results.

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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 (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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Sinu, KJ, and Ranganathan G. "A Novel Hydro Powered Online Power Converter for Marine Lighting Applications." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (2018): 15–19. https://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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Lakshmi, S. Vijaya, T. Sree Renga Raja, R. Sornavadivu, Lakshmanan Maheswari, and K. R. Vaira Mani. "Time Domain Based Digital Controller for Sepic Converter." Applied Mechanics and Materials 573 (June 2014): 130–35. http://dx.doi.org/10.4028/www.scientific.net/amm.573.130.

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This paper presents a discrete PWM controller for SEPIC (Single ended Primary Inductor Converter) converter. SEPIC is chosen since it has positive voltage gain and higher characteristics than any other converter. To improve the transient response and dynamic stability of the proposed converter, Discrete PID controller is the most preferable one. The proposed controller improves the dynamic performance of the SEPIC converter by achieving a robust output voltage against load disturbances, input voltage variations and changes in circuit components. The converter is designed through simulation using MATLAB / Simulink and performance parameters are also measured. The discrete controller is implemented, design goal is achieved and the same is verified against theoretical calculation using LabVIEW. Keywords: SEPIC converter, Discrete PID Controller, Analog to Digital Converter (ADC), Digital Pulse Width Modulator (DPWM).

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Al-Baidhani, Humam, and Abdullah Sahib. "Robust current-mode control of bridgeless single-switch SEPIC PFC converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 2 (2023): 960. http://dx.doi.org/10.11591/ijpeds.v14.i2.pp960-968.

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In this paper, the nonlinear model of the bridgeless single-switch ac-dc single-ended primary-inductor converter (SEPIC) in discontinuous conduction mode is derived. In addition, a robust control method is introduced to accommodate the variations in input voltage and load current. The current-mode controlled power converter is designed to operate in buck and boost modes. The proposed closed-loop SEPIC converter is simulated in MATLAB to validate the design approach. The current-mode control scheme is also compared with the conventional voltage-mode controller. It is confirmed that the proposed control scheme exhibits precise tracking performance and enhanced transient response under large disturbances.

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Humam, Al-Baidhani, and Sahib Abdullah. "Robust current-mode control of bridgeless single-switch SEPIC PFC converter." International Journal of Power Electronics and Drive System 14, no. 02 (2023): 960~968. https://doi.org/10.11591/ijpeds.v14.i2.pp960-968.

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In this paper, the nonlinear model of the bridgeless single-switch AC-DC single-ended primary-inductor converter (SEPIC) in discontinuous conduction mode is derived. In addition, a robust control method is introduced to accommodate the variations in input voltage and load current. The current-mode controlled power converter is designed to operate in buck and boost modes. The proposed closed-loop SEPIC converter is simulated in MATLAB to validate the design approach. The current-mode control scheme is also compared with the conventional voltage-mode controller. It is confirmed that the proposed control scheme exhibits precise tracking performance and enhanced transient response under large disturbances.

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Sankaralingam, Dheeban Sembulingam, Muthu Selvan Balasubramanian Natarajan, Maheswari Muthusamy, and Sarojini Bagavath Singh. "A novel metaheuristic approach for control of SEPIC converter in a standalone PV system." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 2 (2022): 1082. http://dx.doi.org/10.11591/ijpeds.v13.i2.pp1082-1092.

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Fossil fuels are being replaced by renewables. Most of the renewables are intermittent, to have reliable power the renewables have to be conditioned before injecting into the utility grid. The DC-DC converters are perfect power electronic devices for conditioning the renewables. The single ended primary inductor converter (SEPIC) performs the conditioning with a very high voltage transfer gain and minimum ripples. The maximum power extraction from the PV panels is required for providing good quality DC power. Intelligent controllers can make use of optimization techniques. The particle swarm optimization (PSO) technique can optimize the controller to extract the maximum power. The SEPIC converter duty variation is optimized and a comparative analysis with the Buck-Boost converter is done in a MATLAB/Simulink environment. The proposed SEPIC converter system performed well by improving the power tracking by 40% and the system has been analysed in a battery charging environment.

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Dheeban, Sembulingam Sankaralingam, Selvan Balasubramanian Natarajan Muthu, Muthusamy Maheswari, and Bagavath Singh Sarojini. "A novel metaheuristic approach for control of SEPIC converter in a standalone PV system." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 2 (2022): 1082–92. https://doi.org/10.11591/ijpeds.v13.i2.pp1082-1092.

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Fossil fuels are being replaced by renewables. Most of the renewables are intermittent, to have reliable power the renewables have to be conditioned before injecting into the utility grid. The DC-DC converters are perfect power electronic devices for conditioning the renewables. The single ended primary inductor converter (SEPIC) performs the conditioning with a very high voltage transfer gain and minimum ripples. The maximum power extraction from the PV panels is required for providing good quality DC power. Intelligent controllers can make use of optimization techniques. The particle swarm optimization (PSO) technique can optimize the controller to extract the maximum power. The SEPIC converter duty variation is optimized and a comparative analysis with the Buck-Boost converter is done in a MATLAB/Simulink environment. The proposed SEPIC converter system performed well by improving the power tracking by 40% and the system has been analysed in a battery charging environment.

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Bala Duranay, Zeynep, and Hanifi Guldemir. "SIMULATION OF CLOSED LOOP VOLTAGE CONTROL OF SEPIC CONVERTER." International Journal of Engineering Applied Sciences and Technology 7, no. 1 (2022): 01–08. http://dx.doi.org/10.33564/ijeast.2022.v07i01.001.

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In this study, a robust output SEPIC DC-DC converter is designed and simulated. The studied single ended primary inductor converter (SEPIC) output voltage is regulated to a constant value regardless of its input. A double loop PI controller is designed and tuned for the voltage and current control which yields a control technique that results in simple implementation by reducing complexity. The multiloop control technique is used to improve converter behavior in case of wide system parameter variations. The controller parameters and design procedure are provided for the SEPIC converter for non zero current operation mode. The proposed implementation of the controlled SEPIC converter has been simulated in Matlab/Simulink environment. The simulations have been done with various operating conditions. Results show that the PI-controlled SEPIC rejects the disturbances and provides good tracking performance

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Pradeepa S., A. Danish Raja. "Design and Implementation of Closed Loop SEPIC Converter for PV System Based Smart Home Application." Tuijin Jishu/Journal of Propulsion Technology 44, no. 4 (2023): 3805–13. http://dx.doi.org/10.52783/tjjpt.v44.i4.1550.

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The design, simulation, and analysis of the Single- ended primary-inductor converter (SEPIC), one of the least known Switch mode power converters, are presented in this study. By adjusting the switching element's duty cycle, this dc-dc converter may be utilized as a buck-boost converter. With minimal strain on components, SEPIC offers the specific benefit of offering positive polarity output voltage and ripple-free input and output current. This contrasts with conventional buck-boost converters, which have negative polarity output voltage along with extremely irregular currents and increased component stress. This makes it perfect for both commercial and personal uses, such as smart home gadgets that use PV energy. Under various input circumstances, extensive simulation has been performed in continuous conduction mode (CCM) utilizing SIMULINK-MATLAB. A PI controller has been added to optimize the responsiveness, reduce steady state error, and keep the output voltage constant. The SEPIC converter's hardware implementation verifies the simulation's findings.

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Maheswaran, Devi, and Sreedevi V T. "A Commercial Low Cost, Highly Efficient UC3842 based High Brightness LED (HBLED) Lamp." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (2018): 1. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp1-7.

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The conventional lighting sources like incandescent and fluorescent lamps are replaced by High Brightness Light Emitting Diodes (HB-LEDs). In this paper, a HBLED driver using a Single Ended Primary Inductor Converter (SEPIC) with input Power Factor Correction (PFC) is presented. PFC is accomplished using a commercial inexpensive Peak Current Mode Controller (PCMC) IC UC3842 is newly combined with SEPIC converter. Extensive simulation results are carried out and a laboratory prototype to power 18W LED array from AC mains is implemented and the results are presented in detail.

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A. Mejbel, Ihsan, and Turki K. Hassan. "DESIGN AND SIMULATION OF HIGH GAIN SEPIC DC–DC CONVERTER." Journal of Engineering and Sustainable Development 27, no. 1 (2023): 138–48. http://dx.doi.org/10.31272/jeasd.27.1.12.

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This paper proposes a new model of the converter, a single-ended primary-inductor converter (SEPIC) type with a high gain voltage for clean energy sources. The suggested model is established by combining the traditional SEPIC DC-DC converter with two different circuits. The first circuit is a split-inductor circuit that is made of three diodes and two inductors, while the second circuit consists of two capacitors and two diodes. The suggested SEPIC DC-DC converter achieves a high voltage gain of 7.5 times the supply voltage when the duty cycle value is kept at 0.5 with only a unique controlled switch. The gain of the proposed converter is greatly increased while the ripple of output voltage and the input current is decreased for higher values of the duty cycle. In addition, the decreased value of the input current ripple results in limited switching stress. The suggested converter is analyzed in detail for continuous conduction mode (CCM). A MATLAB/ Simulink program is used to confirm the analysis of the suggested converter.

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Kobori, Yasunori, and Haruo Kobayashi. "Single-Inductor Multi-Output DC-DC Switching Converters Using Exclusive Control Method." Digital Technologies Research and Applications 4, no. 1 (2025): 1–43. https://doi.org/10.54963/dtra.v4i1.880.

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This review paper presents Single-Inductor Dual-Output (SIDO) and Single-Inductor Multi-Output (SIMO) DC-DC converters with our proposed exclusive control method. First, we provide an overview of three fundamental types of switching converters: the buck converter, the boost converter, and the buck-boost converter, all using Pulse Width Modulation (PWM) signals for their control. Next, we introduce SIDO converters with the exclusive control method, including the PWM control, the ripple control, the hysteretic control, and the soft-switching (with zero-voltage switching). In addition, we introduce its extension to a configuration of the dual-output Single Ended Inductor Converter (SEPIC) with the buck-boost converter, the high boost converter and the multiplied boost converter. Finally, we show exploration of four-output converters using our proposed voltage comparative circuit. The exclusive control method requires a few additional components but does not rely on current sensors. Also, it is not influenced by the output voltage or current value. Furthermore, we look ahead to future research directions for improving the subject.

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Periyasamy, Muthu, and Chandrahasan Umayal. "Improved Time Responses of PI & FL Controlled SEPIC Converter based Series Resonant Inverter fed Induction Heating System." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 1 (2018): 305. http://dx.doi.org/10.11591/ijpeds.v9.i1.pp305-315.

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This work deals with the Power Factor Corrected Single-Ended Primary Inductor Converter (PFC-SEPIC) based voltage fed closed loop full bridge series resonant induction heating system for household induction heating applications. The output voltage of the front end PFC-SEPIC converter fed series resonant inverter governs the controllers, which may be PI controller or Fuzzy Logic Controller (FLC). The analysis and comparison of time responses are presented in this paper. The PFC-SEPIC converter is used to improve the output power and the THD of source side current are compared for PI and FLC controllers. PFC-SEPIC converter maintains improved current and voltage at unity power factor through the input mains. The SEPIC converter based Voltage Fed Full Bridge Series Resonant Inverter (VFFBSRI) converts the voltage at a frequency of 10 kHz to a level suitable for household induction heating. A 1 kW SEPIC converter based VFFBSRI with RLC load is designed and simulated using MATLAB/ Simulink and hardware is fabricated.

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Ghayyoor, Muhammad, Mian Muhammad Amir Ayaz, Ajmal Farooq, and M. Ali. "Design of an integrated SEPIC and Buck Converter for High Step-down Applications." International Journal of Advanced Natural Sciences and Engineering Researches 7, no. 6 (2023): 214–23. http://dx.doi.org/10.59287/ijanser.1156.

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To overcome the issues related to special power supply called voltage regulator module (VRM) used for microprocessors, a special DC-DC converter will be designed in this work in which single-ended primary inductor (SEPIC) converter and the inverted form of buck converter are combine. As per available literature the problems associated with conventional VRM’s are slow transient response and narrow duty cycle. Other issue related to the voltage regulator module is the high voltage stress that occurs on switches of VRM. The solution to these problems is presented in the form of a new proposed dc-dc converter topology in which the single ended primary inductor is combined with the inverted form of buck converter. The proposed topology has the advantages of reducing the transient time at moderate duty cycle because of the parallel combination of the inductor. Similarly, the parallel combination of capacitor will step down the voltage from 12v to the appropriate voltage level required for the microprocessor. The steady state operation and transient state operation of the proposed VRM is discussed in this thesis. Various operating states of proposed converter are discussed and related equations for voltage gain, voltage stress and transient response have been derived. Output waveforms are plotted, and mathematical modeling is carried out. Simulation results for proposed and conventional VRM are obtained and from comparison of results, it is clear that proposed VRM is good in performances compared to conventional VRM’s.

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Ghayyoor, Muhammad, Mian Muhammad Amir Ayaz, Ajmal Farooq, and M. Ali. "Design of an integrated SEPIC and Buck Converter for High Step-down Applications." International Conference on Applied Engineering and Natural Sciences 1, no. 1 (2023): 436–44. http://dx.doi.org/10.59287/icaens.1036.

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To overcome the issues related to special power supply called voltage regulator module (VRM) used for microprocessors, a special DC-DC converter will be designed in this work in which single-ended primary inductor (SEPIC) converter and the inverted form of buck converter are combine. As per available literature the problems associated with conventional VRM’s are slow transient response and narrow duty cycle. Other issue related to the voltage regulator module is the high voltage stress that occurs on switches of VRM. The solution to these problems is presented in the form of a new proposed dc-dc converter topology in which the single ended primary inductor is combined with the inverted form of buck converter. The proposed topology has the advantages of reducing the transient time at moderate duty cycle because of the parallel combination of the inductor. Similarly, the parallel combination of capacitor will step down the voltage from 12v to the appropriate voltage level required for the microprocessor. The steady state operation and transient state operation of the proposed VRM is discussed in this thesis. Various operating states of proposed converter are discussed and related equations for voltage gain, voltage stress and transient response have been derived. Output waveforms are plotted, and mathematical modeling is carried out. Simulation results for proposed and conventional VRM are obtained and from comparison of results, it is clear that proposed VRM is good in performances compared to conventional VRM’s.

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Rajaboyana, Narendra Rao, Sreenivasulu Meda, and Ramakrishna Busharaju. "Voltage regulation of DC micro grid system using PV and battery coupled SEPIC converter." International Journal of Power Electronics and Drive Systems 14, no. 01 (2023): 41–50. https://doi.org/10.11591/ijpeds.v14.i1.pp41-50.

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This paper deals with the voltage regulation of DC micro grid system using photovoltaic and battery coupled single-ended primary-inductor converter (SEPIC) converter. SEPIC converter is a DC-to-DC boost converter, it can produce non pulsating DC current with less ripples when compared to buck and buck boost converters. Non pulsating DC current is the demanding condition required in maximum power point tracking (MPPT) applications and battery charging. This paper presents the simulation of the converters for both open and closed loop systems. Firstly, the proposed PV coupled SEPIC converter and the battery coupled buck boost converters are integrated to regulate the voltage in micro grid, and it is compared with the conventional methods in terms of output voltage, ripple voltage and power. The ripple voltage has been reduced to 0.1 V from 0.3 V in the proposed method. Secondly, PI and PID controllers are employed individually to SEPIC and buck boost converter for the voltage regulation of the DC micro grid system. The performance of the closed loop analysis is done in terms of time domain specifications, and it reveals that PID controller has the better response. The proposed system is simulated using MATLAB/Simulink and the prototype has been developed to verify the simulated results.

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Cheng, Hung-Liang, Chun-An Cheng, Chien-Hsuan Chang, En-Chih Chang, Lain-Chyr Hwang, and Yi-Chan Hung. "Interleaved Modified SEPIC Converters with Soft Switching and High Power Factor for LED Lighting Appliance." Applied Sciences 14, no. 15 (2024): 6656. http://dx.doi.org/10.3390/app14156656.

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A novel ac/dc LED driver with power factor correction and soft-switching functions is proposed. The circuit topology mainly consists of two modified single-ended primary inductance converters (SEPIC) with interleaved operation. The first half stage of SEPIC operates like a boost converter and the second half stage operates like a buck–boost converter. Each boost converter is designed to operate in discontinuous current mode (DCM) to function as a power factor corrector (PFC). The two buck–boost converters that share a commonly coupled inductor are designed to operate at near boundary conduction mode (BCM). Without using any active clamping circuit, auxiliary switch or snubber circuit, the active switches can achieve zero-voltage switching on, and all diodes achieve zero-current switching off. First, operation modes in steady state are analyzed, and the mathematical equations for design component parameters are derived. Finally, a prototype circuit of 180 W rated power was built and tested. Experimental results show satisfactory performance of the proposed circuit.

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Susmitha, S. Sai, and D. Abhigna. "Design of Sepic Converter Using PID Controller." International Journal for Research in Applied Science and Engineering Technology 11, no. 10 (2023): 466–72. http://dx.doi.org/10.22214/ijraset.2023.55919.

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Abstract: Single-Ended Primary Inductor Converter (SEPIC) is widely used in battery charging of renewable energy and electric/hybrid vehicles due to its output gains range flexibility,less complex switching design, providing an isolation by capacitor and producing non-inverted output. This project presents a modified PID controller to obtain excellent dynamic performance with zero steady-state error. The controller design is discussed and built in discrete model simulation on MatlabSimulink. The effectiveness of the proposed modified PID control strategy is tested for the transient cases in step-changed reference voltage, and varying input voltages. The results show the proposed controller can reach zero steady-state error and produce lower ripple in voltage.

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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 (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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Rao, Rajaboyana Narendra, Meda Sreenivasulu, and Busharaju Ramakrishna. "Voltage regulation of DC micro grid system using PV and battery coupled SEPIC converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 1 (2023): 41. http://dx.doi.org/10.11591/ijpeds.v14.i1.pp41-50.

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This paper deals with the voltage regulation of DC micro grid system using photovoltaic and battery coupled single-ended primary-inductor converter (SEPIC) converter. SEPIC converter is a DC-to-DC boost converter, it can produce non pulsating DC current with less ripples when compared to buck and buck boost converters. Non pulsating DC current is the demanding condition required in maximum power point tracking (MPPT) applications and battery charging. This paper presents the simulation of the converters for both open and closed loop systems. Firstly, the proposed PV coupled SEPIC converter and the battery coupled buck boost converters are integrated to regulate the voltage in micro grid, and it is compared with the conventional methods in terms of output voltage, ripple voltage and power. The ripple voltage has been reduced to 0.1 V from 0.3 V in the proposed method. Secondly, PI and PID controllers are employed individually to SEPIC and buck boost converter for the voltage regulation of the DC micro grid system. The performance of the closed loop analysis is done in terms of time domain specifications, and it reveals that PID controller has the better response. The proposed system is simulated using MATLAB/Simulink and the prototype has been developed to verify the simulated results.

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Rao, D. S. N. M., M. Jasmin, Megha Pandey, Muntather Almusawi, Ghazi Mohamad Ramadan, and R. Senthil Kumar. "Efficiency Analysis Of Modified Sepic Converter For Renewable Energy Applications." E3S Web of Conferences 564 (2024): 01007. http://dx.doi.org/10.1051/e3sconf/202456401007.

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A boosting module and a traditional SEPIC (single ended primary inductance converter) are combined to create the suggested circuit. As a result, the converter gains from the SEPIC converter’s many benefits. Also, the converter that is being presented is appropriate for renewable energy sources due to its high voltage gain and continuous input current. In comparison to a traditional SEPIC with a single-controlled switch, it offers a higher voltage gain. The voltage gains of the converter that has been suggested is closely related to that of the converter that was recently developed. This converter was constructed on the foundation of the conventional converter, as well as the conventional DC-to-DC converter. One of the most important characteristics of a projected converter is that it is equipped with a single controlled device and has the capability to increase voltage gain without the utilisation of a coupled inductor structure or transformer. The non-idealities of the semiconductor devices and passive components have been taken into consideration in the analysis of voltage gain in continuous current mode (CCM). The conventional SEPIC converter can be modified by incorporating capacitors and diodes. The experimental results indicate that this converter can amplify the output voltage by approximately 10 times and has an efficiency of around 97%.

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Mr., Prasad Arvind Pawar, and R.T.Patil Prof. "SEPIC FOR MAXIMUM POWER EXTRACTION FROM SOLAR PANEL." JournalNX - a Multidisciplinary Peer Reviewed Journal RIT PG Con-18 (April 22, 2018): 204–8. https://doi.org/10.5281/zenodo.1413403.

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The impedance matching circuit is used in between load and PV module to ensure that we are operating at MPP. Impedance matching circuits are nothing but DC-DC converters. With the change in climatic conditions, the duty cycle of converter to operate at MPP changes. Thus the converter must be designed to be able to match MPP under fluctuating atmospheric conditions and load https://journalnx.com/journal-article/20150518

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Kim, Jinwoo, Sanghun Han, Wontae Cho, Younghoon Cho, and Hyunsoo Koh. "Design and Analysis of a Repetitive Current Controller for a Single-Phase Bridgeless SEPIC PFC Converter." Energies 12, no. 1 (2018): 131. http://dx.doi.org/10.3390/en12010131.

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This paper studies a repetitive controller design scheme for a bridgeless single-ended primary inductor converter (SEPIC) power factor correction (PFC) converter to mitigate input current distortions. A small signal modeling of the converter is performed by a fifth-order model. Since the fifth-order model is complex to be applied in designing a current controller, the model is approximated to a third-order model. Using the third-order model, the repetitive controller is designed to reduce the input current distortion. Then, the stability of the repetitive controller is verified with an error transfer function. The proposed controller performance is validated by simulation, and the experiment results show that the input current total harmonic distortion (THD) is improved by applying the proposed controller for an 800 W bridgeless SEPIC PFC converter prototype.

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Lin, Zhong-Rong, and Huang-Jen Chiu. "Design and Implementation of Solar OLED Lighting Driver Circuit with Frequency Modulation Control." Energies 13, no. 21 (2020): 5608. http://dx.doi.org/10.3390/en13215608.

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This paper proposes a single-stage single-ended primary inductor converter (SEPIC) converter circuit, which is applied to the organic light-emitting diodes (OLED) driver circuit. The circuit proposed in this paper replaces the output Schottky diode from the original SEPIC with a power switch. Deadtime is added to prevent the on-state overlapping of two switches with zero voltage switching (ZVS), and the circuit operates in triangular current mode. The digital control methods are maximum power point tracking and frequency modulation using a battery to supply the converter and illuminate the OLED at night. Finally, a prototype is implemented to show the feasibility under the DC input voltage range of 10–40 V. The DC output is 12 V/1 A/12 W, and the conversion efficiency is up to 96.3%.

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Abdalla, Ali I., and Israa Hazem Ali. "Analysis of SEPIC Converter at Different Switching Frequencies." International Journal of Electrical and Electronics Research 12, no. 4 (2024): 1374–81. https://doi.org/10.37391/ijeer.120431.

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Single Ended Primary Inductance Converter (SEPIC) which is commonly devoted as a switched power supply in many applications is presented in this work to conclude the effect of switching frequency on the output voltage time response, elements values, spectral analysis of output voltage and efficiency. For this goal, three circuits of SEPIC converters were designed at switching frequencies of 100KHZ, 400KHZ and 600KHZ. The operating conditions of the three circuits which include input voltage range, output voltage value, output voltage ripple and inductor ripple current are kept the same while the inductors and capacitors of the converters are calculated according to each switching frequency. The LTC1871 controller is utilized to produce a required duty cycle (D) to drive the converter. The implementation of the circuits was carried out using LTspice XVII. The results show that the higher switching leads to better time response of the output voltage with small values of passive components of the converter. However, the efficiency of the converter is decreased and the noise due to harmonics is increased. Therefore, the selection of switching frequency must be set accurately according to converter functions.

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Adil, Hasan Mahmood, F. Mohammed Mustafa, Omar Al Mohammed, and H. Ahmad Ali. "Single phase inverter fed through a regulated SEPIC converter." Bulletin of Electrical Engineering and Informatics 10, no. 6 (2021): 2921~2928. https://doi.org/10.5281/zenodo.5908745.

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In power electronics, it is necessary to select the best converter circuit topology that has good performance among different converters. The singleended primary inductor converter (SEPIC) has good performance and is advantageous among different direct DC/DC converters. In this paper, a design of a SEPIC converter is made by selecting the values of its components according to the required output voltage and power. The design is made by an assumption that both of its inductors have the same value. The converter is tested by using MATLAB/Simulink successfully. Later, its output voltage is regulated by using a proportional integral (PI-controller) through tuning its proportional and integral gains. Finally, the SEPIC converter is connected to a single-phase full-bridge inverter to supply its required DC voltage. The role of the SEPIC converter is to regulate the dc-link voltage between its output side and the inverter. The results showed the success of this connection to supply alternating current (AC) loads with low total harmonic distortion (THD).

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P.I.D.T., Baladuraikannan, Karthikapandi T., Kalaimagal J., and Jayashree P. "SEPIC Converter with High Static Gain for Renewable Energy Applications." Journal of Emerging Trends in Electrical Engineering 2, no. 2 (2020): 1–7. https://doi.org/10.5281/zenodo.3902584.

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In this paper a Single Ended Primary Inductor Converter (SEPIC) with high static gain is proposed for renewable energy applications especially for photovoltaic cell. The advantages of SEPIC are continuous input current and gives constant output voltage even though the range of source voltage is large. Thus this converter is preferred to step up / step down the solar panel input voltage. The simulation results are taken in MATLAB / SIMULINK which shows that a high voltage gain is achieved. In addition to this, it also achieves high efficiency by reducing the circulating current. The proto type kit has the rated input voltage is taken as 15 V DC, the voltage across the SEPIC converter is 150 V DC at switching frequency 65 kHz and the load voltage is 150 AC.

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Akter, Khadiza, S. M. A. Motakabber, AHM Zahirul Alam, and Siti Hajar Yusoff. "A New Topology of High-Efficiency DC-DC Hybrid Boost SEPIC Converter for PV Cell." Asian Journal of Electrical and Electronic Engineering 2, no. 2 (2022): 1–10. http://dx.doi.org/10.69955/ajoeee.2022.v2i2.33.

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This paper initiates a high-gain high efficiency step-up DC-DC converter based on Boost SEPIC (Single Ended Primary Inductor Converter) hybrid topology for photovoltaic application. Customarily DC-DC converter circuit is a widely used technique to improve the voltage level of solar cells. However, for low output voltage and low efficiency, they are not sufficient enough to provide expected outcomes. To defeat the conventional system a hybrid Boost SEPIC topology has been recommended with enhanced performance. The proposed design of the DC-DC converter circuit can provide a high voltage gain without decaying its overall performance. The modified converter topology is being worked by a single switch with low switching voltage stress over the semiconductor devices. The main edge of the proposed design is that it can perform efficiently without using any transformer, the combined design of Boost SEPIC topology increases the voltage gain much higher compared to the conventional Boost or SEPIC. The maximum Power Point Tracking (MPPT) algorithm is used to obtain maximum power from a photovoltaic source. MATLAB Simulink and PSIM software has analyzed the performance of the newly designed converter circuit thoroughly.

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Akash, G. Bhople. "Controlling the Speed of PMBLDC Motor Drive for an Air Conditioner by Using BL-SEPIC Converter." Recent Trends in Control and Converter 2, no. 3 (2020): 1–6. https://doi.org/10.5281/zenodo.3605519.

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This paper presents the smooth speed control of a permanent magnet brushless DC motor drive (PMBLDCM) for an air conditioner. The bridgeless single ended primary inductor converter is used for proposed scheme. A bridgeless single ended primary inductor converter is basically boost converter followed by buck –boost converter. An analysis of speed control of permanent magnet brushless DC motor drive is done. The proposed scheme is used to combine the power factor correction controller and DC link voltage control in a single stage. With the implementation of proposed scheme conduction losses will be less. A single switch topology is used for the proposed speed control scheme. For the better speed control of a PMBLDC motor drive, it is essential to control a DC link voltage.  The Dc link voltage is proportional to the speed of BLDC motor drive. Power factor at input side can be control with the help of proposed scheme. A power factor correction (PFC) controller is design discontinuous Current Mode (DCM). A rate limiter is used for control torque and current in PMBLDCM at DC link. With the help of proposed scheme power factor correction (PFC) controller provides better power quality at input AC mains. From the analysis of various results obtained after simulation of BL-SEPIC it is observed that speed of a permanent magnet brushless DC motor drive can be control in smooth manner with power factor correction at input side. The proposed scheme is designed and results are shown in MATLAB Simulink Environment.

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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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Murali, D. "Steady State Behavior of a Single-Switch Non-isolated DC-DC SEPIC Converter Topology with Improved Static Voltage Gain." Journal Européen des Systèmes Automatisés 54, no. 3 (2021): 445–52. http://dx.doi.org/10.18280/jesa.540307.

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This paper presents the analysis of steady state behavior of a single switch non-isolated Single Ended Primary Inductance Converter (SEPIC) topology for achieving high DC voltage gain using diode-capacitor voltage multiplier. A voltage boosting module consisting of inductor and capacitor in addition with two diodes is introduced in the conventional SEPIC configuration in order to derive the DC-DC conversion technology proposed in this work. The voltage gain of the converter is extended using a diode-capacitor voltage multiplier cell. The converter suggested in this work has a single controlled switch. Hence, the conduction losses and the control complexity of the switch are very much reduced. The open loop configuration of the proposed non-isolated converter is described under continuous inductor current mode. The voltage boosting capability of the presented converter is compared with that of the existing modified SEPIC structure. The presented positive output converter topology has low switch voltage-current stress compared to the existing modified SEPIC topology given in the literature. The inductor and capacitor components of the suggested converter are so chosen that the DC output voltage and current waveforms show very low percentage of ripples. A DC voltage level of 24 V is given as input to the proposed converter. The DC voltage obtained across the load terminals is around 370 V which is achievable with low duty ratio (= 0.7) of the active switch. The voltage conversion ratio is very much influenced by the variation of the duty cycle of the power switch. In this work, the converter topology is presented and its various modes of operation are explained with equivalent circuits. The PSIM software platform is effectively and efficiently utilized to validate the performance of the converter. The obtained results convey that the proposed DC-DC conversion technology with extended voltage gain has the capability to maintain the steady-state output voltage and current profiles with almost negligible amount of ripples owing to the use of suitably designed non-dissipative elements in LC filter.

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Sutikno, Tole, and Rizky Ajie Aprilianto. "Application of SEPIC DC-DC converter for low-voltage energy harvesting systems." Intellectual Journal of Energy Harvesting and Storage 1, no. 1 (2023): 1–7. https://doi.org/10.11591/ehs.v1i1.pp1-7.

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Energy harvesting systems (EHS) have been known as a concept to obtain energy from a clean source and convert it into other energy, including electricity. EHS can be classified into four sources: light, electromagnetic, thermal, and kinetic energy. Unfortunately, most harvester devices generate electricity within the low-voltage level, so voltage conditioning is needed to achieve a feasible level. Single‐ended primary‐inductor converter (SEPIC) DC-DC converter becomes one of the solutions to realize it, which works by increasing DC level voltage. In this study, the role of SEPIC DC-DC converter for HES applications focusing on three of four sources along with its harvester devices, i.e., light by PV, gradient temperature by TEG, and pressure by a piezoelectric device, are reviewed. Also, the overview of challenges and the possibility of HES obtained are described. Then, the application of each harvester device and the SEPIC DC-DC converter is explained to low-voltage EHS applications, for instance, in renewable energy power plants, street lighting, small-scale power applications, or power sources at wearable devices. Lastly, the primary issue in the SEPIC DC-DC converter and research information that may be carried out in future studies are given.

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Krishnakumar, Maheswari C., Rani Thottungal, and Divya A.C. "A Modified Bridgeless Converter for SRM Drive with Reduced Ripple Current." International Journal of Power Electronics and Drive Systems (IJPEDS) 6, no. 2 (2015): 362. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp362-369.

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Single Phase Switched Reluctance Motor is more popular in many industrial purposes for high speed applications because of its robust and rugged construction. For low cost and variable speed drive applications SRM are widely used.Due to doubly salient structure of motor, the torque pulsations are high when compared to other sinusoidal machines. The major drawback in using SRM drive is torque pulsations and increased number of switching components. In order to overcome these drawbacks, a bridgeless Single Ended Primary Inductor Converter (SEPIC) is proposed. The major advantages of this converter are continuous output current,smaller voltage ripple and reduced semiconductor current stress when compared to the conventional SEPIC converter. The ripple free input current is obtained by using additional winding of input inductor and auxiliary capacitors. To achieve high efficiency, active power factor correction circuits (PFC) are employed to precise the power factor. Further, the unity power factor can be obtained by making the input current during switching period proportional to the input voltage is proposed. The proposed system consists of reduced components and it is also capable of reducing the conduction losses. The working principles and the waveforms of proposed converter are analyzed. To analyze the circuit operation, theoretical analysis and simulation results are provided. Finally, the comparison between the waveforms of conventional SEPIC and proposed system is presented by using MATLAB/Simulink tools.

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Abramovich, Boris Nikolaevich, Denis Anatolevich Ustinov, and Wael Joseph Abdallah. "Modified proportional integral controller for single ended primary inductance converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 2 (2022): 1007. http://dx.doi.org/10.11591/ijpeds.v13.i2.pp1007-1025.

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The article highlights and optimizes a controller for the single ended primary inductance converter (SEPIC) direct current-direct current (DC-DC) converter. The SEPIC converter adjusts a range of dc input voltages and delivers a constant and stable output voltage. Three different models of the SEPIC converter are presented in order to derive its transfer function. Being a 4th order, an approximation method for the reduction of this transfer function to 2nd and 1st order is implemented. Two methods for controlling the converter are presented, the first one is based on guessing techniques and the second explains the design steps of the controller based on the internal model control (IMC). Furthermore, an improvement on the IMC controller is proposed and results were shown and discussed. IMC is based on integrating the “process model” in the control operation of the actual system. By using an approximation of the original transfer function of the system, it is expected that the IMC control will be able to achieve the desired results. Control schemes of the SEPIC will be presented and results will be shown. The response of the controller was tested with mathematical models for batteries and supercapacitors in MATLAB, as non-ideal DC-sources, and results were presented.

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Freitas, Tiara, João Caliman, Paulo Menegáz, Walbermark dos Santos, and Domingos Simonetti. "A DCM Single-Controlled Three-Phase SEPIC-Type Rectifier." Energies 14, no. 2 (2021): 256. http://dx.doi.org/10.3390/en14020256.

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A discontinuous conduction mode (DCM) three-phase single-ended primary-inductor converter (SEPIC) is presented in this article. The analyzed converter operates as a high-power factor stage in AC–DC conversion systems. As its main features, it presents three controlled switches and a single control signal with simple implementation and low-current harmonic distortion. The converter topology, its design equations, and its operation modes are presented as well as a simulation analysis considering a 3 kW–220 V three-phase input to 400 V DC output converter. The experimental results are included, considering as an application the rectifier stage in low-power wind energy conversion systems (WECS) based on a 1 kW permanent magnet synchronous generator (PMSG) with variable voltage frequencies. From the analysis performed in the paper and the simulation and experimental results revealed, it is concluded that the converter is indicated to be employed in any AC–DC low-power conversion system, such as DC distribution systems, and distributed generation or hybrid systems containing variable-frequency generation.

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Journal articles on the topic 'Single-ended primary-inductor converter (SEPIC)'

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