Journal articles: 'DC-DC Converter'

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Besekar, Nikita Prashant. "DC-DC Converters Topology." Journal of Image Processing and Intelligent Remote Sensing, no. 32 (February 8, 2023): 11–21. http://dx.doi.org/10.55529/jipirs.32.11.21.

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In this paper the various perspectives on different dc-dc converters are reviewed . The various advantages and disadvantages of both Converter topologies that are classical and recent converters and overview of dc micro grid are discussed. From the data we found that every Converter has some advantages and disadvantages also but the Buck, Boost, Cuk and zeta Converter have less ripple. And Buck and Boost has the best efficiency as per cost. The dc micro grid has lots of advantages over AC microgrids; they can perform reliable operation, higher efficiency, low power loss and no skin effect. Theoretical and practical implications were discussed. Advanced dc converters are also reviewed.

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Faraj, Karrar Saad, and Jasim F. Hussein. "Analysis and Comparison of DC-DC Boost Converter and Interleaved DC-DC Boost Converter." Engineering and Technology Journal 38, no. 5A (May 25, 2020): 622–35. http://dx.doi.org/10.30684/etj.v38i5a.291.

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The step-up converters are widespread use in many applications, including powered vehicles, photovoltaic systems, continuous power supplies, and fuel cell systems. The reliability, quality, maintainability, and reduction in size are the important requirements in the energy conversion process. Interleaving method is one of advisable solution for heavy-performance applications, its harmonious in circuit design by paralleling two or more identical converters. This paper investigates the comparison performance of a two-phase interleaved boost converter with the traditional boost converter. The investigation of validation performance was introduced through steady-state analysis and operation. The operation modes and mathematical analysis are presented. The interleaved boost converter improves low-voltage stress across the switches, low-input current ripple also improving the efficiency compared with a traditional boost converter. To validate the performance in terms of input and output ripple and values, the two converters were tested using MATLAB/SIMULINK. The results supported the mathematical analysis. The cancelation of ripple in input and output voltage is significantly detected. The ripple amplitude is reducing in IBC comparing with a traditional boost converter, and the ripple frequency is doubled. This tends to reduce output filter losses, and size.

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Ahamed, M. Ejas, and S. Senthilkumar. "Review of Bidirectional DC-DC Converters." International Journal of Advance Research and Innovation 5, no. 4 (2017): 33–42. http://dx.doi.org/10.51976/ijari.541706.

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There is a growing importance in bidirectional dc-dc converters for interface battery with energy source. This paper provides a comprehensive review of non-isolated bidirectional dc-dc converter topologies. The classification and explanation of each type of converter is based on the features and applications. This review paper is intended as a convenient reference to future bidirectional dc-dc converter users. The most promising converters in terms of their simplicity, flexibility, and high efficiency are singled out.

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Krishna, P. Mohan. "DESIGN OF MULTI-PORT DC-DC CONVERTER." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 06 (June 9, 2024): 1–5. http://dx.doi.org/10.55041/ijsrem35616.

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Integrating Energy sources to have a sustainable energy supply is an important aspect to handle the significant loads. Multiport power converters are used to connect various types of energy sources and loads. The key advantages of multi-input converters lie in their capability to interface with multiple input sources such as solar panels, wind turbines, batteries, and grid power, thereby optimizing energy utilization and enhancing system reliability. In the paper, a new configuration of single switch Dual– Input Single-Output (DISO) DC-DC converter is proposed. This paper presents an overview of multi-input converters, focusing on their design, operation, and applications in renewable energy integration Multiport converter reduces the system size and cost by reducing the number of components. The proposed converter is verified in MATLAB/ Simulink and validated with simulation results. Key Words: Dul-input single-output converter (DISO), switch, and Multiport converter.

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Cipriano dos Santos Júnior, Euzeli. "Dual-output DC-DC buck converter." Eletrônica de Potência 17, no. 1 (February 1, 2012): 474–82. http://dx.doi.org/10.18618/rep.2012.1.474482.

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Kim, Seong-Hwan, Jae-Jung Hur, Bum-Dong Jeong, and Kyoung-Kuk Yoon. "Improved DC-DC Bidirectional Converter." Journal of the Korean Society of Marine Engineering 41, no. 1 (January 31, 2017): 76–82. http://dx.doi.org/10.5916/jkosme.2017.41.1.76.

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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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Jalbrzykowski, S., and T. Citko. "Push-pull resonant DC-DC isolated converter." Bulletin of the Polish Academy of Sciences: Technical Sciences 61, no. 4 (December 1, 2013): 763–69. http://dx.doi.org/10.2478/bpasts-2013-0082.

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Abstract A new concept of a DC-DC converter with galvanic isolation is proposed in this paper. The converter belongs to the class E resonant converters controlled by pulse width modulation via frequency regulation (PWM FM). Due to the possibility of operation in the boost and buck modes, the converter is characterized by a high range of voltage gain regulation. The principle of converter operation described by mathematical equations is presented. The theoretical investigations are confirmed by p-spice model simulations and the measurement of an experimental model of 1kW laboratory prototype.

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Cherdintsev, A. A., A. V. Shagin, and S. A. Lupin. "Modified Predictive Control System of the DC-DC Boost Converter." Proceedings of Universities. Electronics 26, no. 6 (December 2021): 533–46. http://dx.doi.org/10.24151/1561-5405-2021-26-6-533-546.

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Nowadays, predictive control systems are becoming more and more popular, which significantly reduce the cost of setting up converters. However, DC-DC converter control problem persists. In this work, a modified model of the predictive control system (MPCS) for step-up DC-DC converters is presented. For its implementation, a nonlinear model of a converter with discrete time switching was derived, which describe a continuous conduction mode of operation. The synthesis of the controller was achieved by formulating the objective function that should be minimized considering the dynamic model of the converter. The proposed predictive control strategy, used as a voltage control system, allows keeping the output voltage at the reference level. The modified system for calculating the objective function makes it possible to significantly reduce the required computing power and expand the prediction horizon. The results of modeling have been presented that demonstrate the advantages of the proposed control method: a fast transient response and a high degree of robustness.

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Rouzbehi, Kumars, Arash Miranian, Juan Manuel Escaño, Elyas Rakhshani, Negin Shariati, and Edris Pouresmaeil. "A Data-Driven Based Voltage Control Strategy for DC-DC Converters: Application to DC Microgrid." Electronics 8, no. 5 (April 30, 2019): 493. http://dx.doi.org/10.3390/electronics8050493.

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This paper develops a data-driven strategy for identification and voltage control for DC-DC power converters. The proposed strategy does not require a pre-defined standard model of the power converters and only relies on power converter measurement data, including sampled output voltage and the duty ratio to identify a valid dynamic model for them over their operating regime. To derive the power converter model from the measurements, a local model network (LMN) is used, which is able to describe converter dynamics through some locally active linear sub-models, individually responsible for representing a particular operating regime of the power converters. Later, a local linear controller is established considering the identified LMN to generate the control signal (i.e., duty ratio) for the power converters. Simulation results for a stand-alone boost converter as well as a bidirectional converter in a test DC microgrid demonstrate merit and satisfactory performance of the proposed data-driven identification and control strategy. Moreover, comparisons to a conventional proportional-integral (PI) controllers demonstrate the merits of the proposed approach.

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García-Vite, Pedro Martín, Julio C. Rosas-Caro, Josué Francisco Rebullosa-Castillo, Manuel Alejandro García-Perales, Jesús Eduardo Pedraza-Barrón, and Brenda Lizeth Reyes-García. "Flying Capacitor Double Dual Boost DC-DC Converter." Electronics 13, no. 17 (August 30, 2024): 3451. http://dx.doi.org/10.3390/electronics13173451.

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This article presents a detailed analysis of a previously introduced boost converter based on cascaded capacitor connections. The analyzed converter maintains the same voltage gain as its conventional double-boost converter counterpart. The main advantage of the redesigned converter is that it requires smaller capacitors, rated to a lower voltage, due to the cascaded connection. This makes it suitable for various applications, including distributed generation and microgrids. This paper conducts the mathematical modeling of the converter with large signal models and the equilibrium operation in continuous conduction mode, employed to implement a control scheme. Even though the individual capacitor voltage ripple reaches high values, for voltage gains above five, the output voltage ripple is lower compared with that of other converters. The analysis also includes a comparative study with the conventional double dual boost converter. Simulations assess the proposed topology’s ability to effectively minimize the switching ripple in the output voltage, even with smaller capacitors. Finally, experimental results are also provided to confirm the functionality of the proposed converters under various operational conditions, which confirm its suitability for low-voltage generator applications.

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Antchev, Hristo. "Battery charging system from cascaded DC/DC converters." Science, Engineering and Education 4, no. 1 (December 21, 2017): 28–30. http://dx.doi.org/10.59957/see.v4.i1.2019.4.

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This study considers an accumulator battery charging system from a photovoltaic panel with increased open circuit output voltage. The system consists of two series connected converters - step-down converter (buck) and step down/step up Single Ended Inductance Converter (SEPIC). The first converter limits the output voltage of the photovoltaic panel to the allowable range of input voltage variation of the second con- verter. The last converter implements the charging algorithm - constant current charge with voltage limit.

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Shyu, Kuo-Kai, Yi-Chang Yu, Xin-Lan Lin, Lung-Hao Lee, and Po-Lei Lee. "A Novel Bidirectional-Switched-Capacitor-Based Interlaced DC-DC Converter." Electronics 12, no. 4 (February 5, 2023): 792. http://dx.doi.org/10.3390/electronics12040792.

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This study proposes a novel bidirectional-switched-capacitor-based interleaved converter. In view of the shortcomings of the two well-known unidirectional-switched-capacitor-based interleaved converters, this study improves such converters through combining the novel structure of a switched capacitor circuit. The first effort was to overcome the drawback of the Cockcroft–Walton-based interleaved converter, whose circuit impedance and ripple cause a serious output voltage drop. The second was to solve the Dickson-based interleaved converter with its capacitors subjected to high-voltage stress. The third was to relax the unidirectional boost function of the Cockcroft–Walton- or Dickson-based interleaved converter. This study avoided not only high-circuit impedance and ripple, as in the case of the Cockcroft–Walton converter, but also it had lower component stress than the Dickson converter. In addition, this study redesigned the unidirectional boost function of the Cockcroft–Walton- or Dickson-based interleaved converter, such that the switch-capacitor-based interleaved converters became bidirectional DC-DC converters. Finally, the experimental results are provided to verify the feasibility of the proposed method.

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Yan, Junchi. "Comparison and Optimization of Non-isolated DC-DC Converters for Electric Vehicle Applications." Highlights in Science, Engineering and Technology 76 (December 31, 2023): 609–17. http://dx.doi.org/10.54097/zdpznq48.

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This paper discusses the importance of electric vehicles in solving the problem of environmental pollution. In electric vehicles, DC/DC converter is a vital part to connect many electrical units with high voltage bus, so it plays a vital and indispensable role in electric vehicles. The paper analyzes the disadvantages of isolated DC/DC converter, and concludes that non-isolated DC/DC converter is a more suitable technical solution for electric vehicles. The research paper introduces a number of fundamental non-isolated DC/DC converter topologies before analyzing the technical optimization strategies of a number of DC/DC converters in general. which are Half-bridge converters, Cascaded Half-bridge converter (CHB), multi-phase interleaved parallel converter, tri-level converter, soft-switching converter, and switched-capacitor converter (SC converter). The benefits and drawbacks of these DC/DC converter optimization measures are compared, the findings can serve as a technical framework for guiding the application of DC/DC converter technology in the context of electric vehicles. Finally, this paper analyzes and looks forward to the development prospect of flying switched-capacitor DC/DC converters (FCDCs) technology, puts forward the existing technical problems, and gives suggestions for the solution of these problems, which is conducive to the wider application of this technical solution in electric vehicles.

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Ribes-Mallada, U., R. Leyva, and P. Garcés. "Optimization of DC-DC Converters via Geometric Programming." Mathematical Problems in Engineering 2011 (2011): 1–19. http://dx.doi.org/10.1155/2011/458083.

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The paper presents a new methodology for optimizing the design of DC-DC converters. The magnitudes that we take into account are efficiency, ripples, bandwidth, and RHP zero placement. We apply a geometric programming approach, because the variables are positives and the constraints can be expressed in a posynomial form. This approach has all the advantages of convex optimization. We apply the proposed methodology to a boost converter. The paper also describes the optimum designs of a buck converter and a synchronous buck converter, and the method can be easily extended to other converters. The last example allows us to compare the efficiency and bandwidth between these optimal-designed topologies.

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Vasquez Mayen, Eduardo, and Emmanuel De Jaeger. "Average Modeling of High Frequency AC Link Three-Port DC/DC/DC Converters." Electricity 5, no. 2 (June 17, 2024): 397–425. http://dx.doi.org/10.3390/electricity5020021.

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The current transition towards renewable energies has led to an increased utilization of Photovoltaic (PV) sources and battery energy storage systems to complement the PV panels. To facilitate energy transfer among PVs, batteries, and loads, multiple converters are required. Thus, this transformation in the energy system has resulted in an increase in converter-interfaced elements. Within this context, three-port converters allow for replacing multiple converters with a single one. These three-port converters use a high-frequency AC resonant link for the bidirectional transfer of energy across the different ports. This architecture uses multiple switches and has a variable operating frequency. These characteristics make the simulation of these converters computationally heavy. Thus, averaged models are required, especially for simulating multiple converters connected in parallel or composing a microgrid. In this paper, an averaged model for this type of converter is developed. The methodology is first demonstrated and applied to a two-port DC/DC converter, and subsequently extended to the three-port DC/DC/DC version. Afterwards, control strategies for three-port DC/DC/DC converters are proposed based on the elements connected to their ports. The developed model for three-port DC/DC/DC converters is then implemented in an islanded DC microgrid to demonstrate their parallel operation. The proposed developed averaged models and the test DC microgrid are implemented in MATLAB/Simulink.

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Soman, Sarun, Nishtha Shelly, Ciji Pearl Kurian, and Sudheer Kumar TS. "DC transformer modeling and control of DC-DC buck converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 1 (March 1, 2019): 319. http://dx.doi.org/10.11591/ijpeds.v10.i1.pp319-329.

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Switching Power Converters convert one form of power to another with high ef-ciency and accurate control.One of the most widely used DC-DC Converter is Buck Converter. Control is invariably required to maintain the output voltage/current in spite of variations in source/load. In order to design the controller and gain insight about the system a dynamic model needs to be developed. Modeling techniques widely used are state space averaging and PWM switch model. In this paper DC transformer modeling technique is used to develop the averaged model of the converter. One of the advantages of this model is that it can be implemented in Spice simulator using basic circuit elements. The same model can be used for time domain as well as frequency domain analysis. Analog type-II compensator is designed to compensate the system. Simulation and experimental results for start-up transient and load transient are shown to validate the model.

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Ahmad, Javed, Mohammad Zaid, Adil Sarwar, Chang-Hua Lin, Mohammed Asim, Raj Kumar Yadav, Mohd Tariq, Kuntal Satpathi, and Basem Alamri. "A New High-Gain DC-DC Converter with Continuous Input Current for DC Microgrid Applications." Energies 14, no. 9 (May 4, 2021): 2629. http://dx.doi.org/10.3390/en14092629.

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The growth of renewable energy in the last two decades has led to the development of new power electronic converters. The DC microgrid can operate in standalone mode, or it can be grid-connected. A DC microgrid consists of various distributed generation (DG) units like solar PV arrays, fuel cells, ultracapacitors, and microturbines. The DC-DC converter plays an important role in boosting the output voltage in DC microgrids. DC-DC converters are needed to boost the output voltage so that a common voltage from different sources is available at the DC link. A conventional boost converter (CBC) suffers from the problem of limited voltage gain, and the stress across the switch is usually equal to the output voltage. The output from DG sources is low and requires high-gain boost converters to enhance the output voltage. In this paper, a new high-gain DC-DC converter with quadratic voltage gain and reduced voltage stress across switching devices was proposed. The proposed converter was an improvement over the CBC and quadratic boost converter (QBC). The converter utilized only two switched inductors, two capacitors, and two switches to achieve the gain. The converter was compared with other recently developed topologies in terms of stress, the number of passive components, and voltage stress across switching devices. The loss analysis also was done using the Piecewise Linear Electrical Circuit Simulation (PLCES). The experimental and theoretical analyses closely agreed with each other.

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Valmir de Souza, Eduardo, and Ivo Barbi. "Bidirectional Flyback-push-pull Dc-dc Converter." Eletrônica de Potência 20, no. 2 (May 1, 2015): 195–204. http://dx.doi.org/10.18618/rep.2015.2.195204.

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Mishra, Debani Prasad, Rudranarayan Senapati, and Surender Reddy Salkuti. "Comparison of DC-DC converters for solar power conversion system." Indonesian Journal of Electrical Engineering and Computer Science 26, no. 2 (May 1, 2022): 648. http://dx.doi.org/10.11591/ijeecs.v26.i2.pp648-655.

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This paper covers the comparison between four different DC-DC converters for solar power conversion. The four converters are buck converter, buck-boost converter, boost converter, and noninverting buck-boost converter. An MPPT algorithm is designed to calculate battery voltage, current of PV array, the voltage of PV array, power of PV array, output power. It is observed that the non-inverting buck-boost converter is the finest converter for solar power conversion. The final circuit design has the results of 12.2V battery voltage, 0.31A current of PV array, 34V voltage of PV array, 23mW power of PV panel, and 21.8mW of output power. The efficiency of this system is nearly 95%. All four circuits are simulated in MATLAB/Simulink R2020b.

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Zotov, L. G., and I. M. Bolshakov. "Energy efficient capacitor DC-DC converter for autonomous power supply system." Vestnik IGEU, no. 4 (August 31, 2023): 70–76. http://dx.doi.org/10.17588/2072-2672.2023.4.070-076.

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The main requirement for autonomous power supply systems is improved weight-size and energy parameters. A promising way to solve this problem is to use DC-DC converters based on resonant structures with switched capacitors. Improvement of energy indicators of the converter is achieved due to soft-switching mode of semiconductor elements providing reduction of dynamic power losses and increasing the level of the primary source. Improvement of weight-size parameters of the converter is provided due to the following: multi-cycle principle of the design providing a significant increase of frequency conversion up to several hundred kHz due to multiple reduction of installed capacity of semiconductor elements; high specific energy indicators of modern multilayer ceramic capacitors, more than two orders of magnitude higher than similar indicators of reactors and transformers; optimization of parameters of semiconductor and reactive elements, which also contributes to significant reduction of weight and volume of power supply systems. The authors have conducted the analysis of weight-size parameters of the step-up DC-DC converter and the value of its efficiency under the assumption of proportionality of weight and volume of reactive converter elements to the maximum accumulated energy and proportionality of weight and volume of semiconductor elements to their installed capacity. The authors have proposed and studied the circuit of multipolar DC-DC converter based on structures with switched capacitors, which has the space symmetry. The space symmetry provides a significant improvement of weight-size parameters due to two-fold reduction of the total installed capacity of semiconductor elements. The volume and energy indicators of the converter under study as a part of power supply system have been evaluated. A method to design a power circuit of a capacitor converter with improved energy and weight-size parameters as a part of an autonomous power supply system is proposed. The authors have established the most effective ways to improve the weight-size and energy indicators of DC voltage converters. The improvement of weight-size parameters is achieved due to a twofold reduction of the installed capacity of semiconductor elements and optimization of the parameters of reactive elements. Improvement of energy indicators is achieved due to increasing the input voltage level of the converter and soft switching of its semiconductor elements.

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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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Ding, Huaxing, Guibin Zou, Ning Ding, and Chuanjie Wang. "Study of the IPOS DC/DC Converter for DC Offshore Wind Farm." Journal of Physics: Conference Series 2320, no. 1 (August 1, 2022): 012016. http://dx.doi.org/10.1088/1742-6596/2320/1/012016.

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Abstract With the development of the offshore wind farms, DC offshore wind farm topology is getting more attention due to its low loss and light weight, where the DC/DC converters with high voltage gain are key equipments. This paper studies the Input-Parallel-Output-Series(IPOS) converter based on Dual-Active-Bridge(DAB) topology, discusses the modulation and control method of the converter, and proposes a fault ride-through scheme. Simulation results validate the proposed topologies and control schemes.

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Ivanov, M. D., and R. T. Khazieva. "DC/DC converter in the electric vehicle traction system." Vestnik MGTU 26, no. 4 (December 22, 2023): 361–73. http://dx.doi.org/10.21443/1560-9278-2023-26-4-361-373.

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DC-DC converters are used in various electrical devices including the traction system of electric vehicles. Electric vehicles use synchronous motors with permanent magnets as drives. Their distinctive feature is the nonlinear dependence of the electromagnetic torque of the motor on its input voltage. One of the ways to improve the energy characteristics of an electric vehicle is to include a DC-DC converter in the engine power supply circuit. The study has examined the main types of DC-DC converters, studied their advantages and disadvantages; a method has been determined to increase the energy efficiency of an electric vehicle by using a multi-channel DC-DC converter as part of its power circuit. This structure makes it possible to reduce the requirements for individual power switches and converter elements, and is also optimal from the point of view of weight and size indicators, since converters of this type do not have a transformer. Based on the review, a multichannel DC-DC converter circuit has been selected for integration into the traction electric drive system. The Tesla Model S has been chosen as the base vehicle. Based on the calculated dynamic characteristics of the electric vehicle, main parameters of the DC-DC converter have been determined, computer simulation of the power plant of an electric vehicle with a DC-DC converter has been carried out in the Matlab Simulink software environment. The use of the converter improves the energy efficiency of vehicles, and is also a better solution compared to installing a battery with a higher voltage.

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Babu, Thiruveedula Madhu, Kalagotla Chenchireddy, Jakkani Rohini, Mesaragandla Sai Suhas, Dara Ajitesh, and Kanaparthi Rahul. "High voltage DC-DC converter with standalone application." International Journal of Applied Power Engineering (IJAPE) 12, no. 4 (December 1, 2023): 384. http://dx.doi.org/10.11591/ijape.v12.i4.pp384-390.

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Designing DC-DC converters involves many voltage lift techniques. These techniques have been encouraged for their credible advantages. Most voltage lifting methods are applied in many areas of automotive, motor drives, telecom and electronic welfare in military applications. Voltage lifting techniques are known for their high voltage transfer gain and high efficiency. Ultra-lift converter yields very high output transfer gain with geometric progression compared to other voltage lift techniques such as super lift converters and classical boost converters. It also offers reduced size and improved efficiency when compared. In this proposed method ultra-lift converter operation is analyzed with continuous conduction mode.

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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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Jalbrzykowski, S., and T. Citko. "A bidirectional DC-DC converter for renewable energy systems." Bulletin of the Polish Academy of Sciences: Technical Sciences 57, no. 4 (December 1, 2009): 363–68. http://dx.doi.org/10.2478/v10175-010-0139-7.

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A bidirectional DC-DC converter for renewable energy systemsTo improve the energy quality, most of the renewable energy systems include an energy storage element charged by the bidirectional DC-DC converter. This paper proposes the bidirectional DC-DC converter which employs the two bridge configuration resonant class-E converters on the both sides of the isolating transformer. The low side converter is controlled as step up and the high side converter is controlled as step down. The proposed system is characterized by good dynamic properties and high efficiency because the converter transistors are switched in ZVS conditions. A theoretical analysis to provide relations for system design, and the laboratory model investigations to validate the system characteristic are given in the paper.

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Mitra, Lopamudra, and Ullash Kumar Rout. "Optimal control of a high gain DC- DC converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 13, no. 1 (March 1, 2022): 256. http://dx.doi.org/10.11591/ijpeds.v13.i1.pp256-266.

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Different types of power conditioning systems are mostly used with renewable energy systems. As the output of solar photovoltaic (PV) is low high voltage converters are required. These converters can be used for both standalone and grid tied systems. A high voltage gain DC-DC converter is proposed which can be used with photovoltaic modules to get high output voltage. This converter can provide a high voltage gain and a proportional integral derivative (PID) controller is used to maintain the high output voltage of the proposed converter coupled with solar photovoltaic module. The PID controller is first designed using classical Ziegler Nichol’s method (ZN) and optimal control of the converter is obtained by using different optimisation methods like particle swarm optimisation (PSO), bacteria foraging algorithm (BFA) and its comparison is presented in this paper.

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Aditama, Ridha D. N., Naqita Ramadhani, Jihad Furqani, Arwindra Rizqiawan, and Pekik Argo Dahono. "New bidirectional step-up DC-DC converter derived from buck- boost DC-DC converter." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 3 (September 1, 2021): 1699. http://dx.doi.org/10.11591/ijpeds.v12.i3.pp1699-1707.

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This paper proposes a new bidirectional step-up DC-DC converter, namely modified buck-boost DC-DC converter. The proposed DC-DC converter was derived from the conventional buck-boost DC-DC converter. Output voltage expression of the proposed converter was derived by considering the voltage drops across inductors and switching devices. The results have shown that with the same parameter of input LC filter, proposed DC-DC converter has lower conduction losses. Moreover, the proposed DC-DC converter has lower rated voltage of filter capacitor than the conventional boost DC-DC converter which lead to cost efficiency. Finally, a scaled-down prototype of laboratory experiment was used to verify its theoretical analysis.

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Silva-Vera, Edgar D., Jesus E. Valdez-Resendiz, Gerardo Escobar, Daniel Guillen, Julio C. Rosas-Caro, and Jose M. Sosa. "Data-Driven Modeling of DC–DC Power Converters." Electronics 13, no. 19 (October 1, 2024): 3890. http://dx.doi.org/10.3390/electronics13193890.

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This article presents a data-driven methodology for modeling DC–DC power electronic converters. Using the proposed methodology, the dynamics of a converter can be captured, thereby eliminating the need for explicit theoretical modeling methods. This approach only requires the acquisition of fundamental measurements: currents through inductors and voltages across capacitors. The acquired data are used to construct a linear difference system, which is algebraically manipulated to form a state–space representation of the converter under analysis. Three DC–DC converter topologies were analyzed, and their resulting models were tested and compared with simulation data, yielding an average error deviation of approximately 2% for current signals and 4% for voltage signals, demonstrating precise tracking of the actual dynamics. The proposed data-driven methodology could simplify the implementation of adaptive control strategies in larger-scale solutions or in the interconnection of multiple converters.

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TIAN, XIJIN. "DC-DC CONVERTER RELIABILITY: DESIGN, COMPONENTS AND QUALIFICATION." International Journal of Reliability, Quality and Safety Engineering 12, no. 05 (October 2005): 459–74. http://dx.doi.org/10.1142/s021853930500194x.

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This paper provides a comprehensive study on reliability issues related to DC-DC converter design. First of all, some common reliability issues and DC-DC converter design topologies are discussed. Then, a reliability sensitivity study results on an industry standard VRM is presented using a prediction-based design-for-reliability and sensitivity analysis tool created by the author and colleagues at HP. The thermal design issues and component derating in the converter design are discussed. Since electronic component reliability has been a bottleneck in DC-DC converter reliability, the component reliability issues are discussed and some reliability application guidelines are also provided for the DC-DC converters reliability design. In the last part of the paper, an integrated reliability testing, qualification, and quality control procedure is presented using highly accelerated testing methodology. The use of this procedure by HP on DC-DC converter reliability and quality control has shown promising results.

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Choong, Florence Chiao Mei, and Yin May Yeo. "An Improved DC-DC Boost Converter for Energy Harvesting." Journal of Engineering Technology and Applied Physics 5, no. 2 (September 15, 2023): 69–78. http://dx.doi.org/10.33093/jetap.2023.5.2.8.

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A novel dual-input DC-DC boost converter that can perform the integration of harvested energy from solar and vibrational input energy sources is proposed. Firstly, the background of a hybrid energy system that relates to multi-input DC-DC converters is discussed, and the limitations of the current designs of power converter ICs are highlighted. A detailed design analysis of the proposed converter was done to justify its performance. A current and voltage stress analysis has been performed to ensure suitable switching devices are selected for the converter. Two different power control strategies are proposed for the DIDCB converter to manage output voltage during source and load-side disturbances. Performance analysis of the circuit is carried out using MATLAB Simulink software. Different duty ratios for power switches in the converter were tested to determine the maximum boost ratio and the highest efficiency that can be achieved by the converter. To demonstrate the feasibility of the proposed converter, the performance of the converter is compared with existing converter topologies. The proposed converter achieved a high efficiency of 99.4%, had less fluctuation in the output voltage, and had reduced overshoot. In addition, the proposed converter demonstrated a simpler configuration and required fewer component counts, which helped reduce the cost and size of the system.

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Jovcic, Dragan, and Lu Zhang. "LCL DC/DC Converter for DC Grids." IEEE Transactions on Power Delivery 28, no. 4 (October 2013): 2071–79. http://dx.doi.org/10.1109/tpwrd.2013.2272834.

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Jagadeesh. "Design and analysis of PV-based ZETA converter for EV charging." i-manager’s Journal on Electrical Engineering 17, no. 2 (2023): 10. http://dx.doi.org/10.26634/jee.17.2.20258.

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Conversion of Energy plays a crucial role in present-day and requires efficient converter systems. In the conversion of energy process either AC can be converted to DC or DC can be converted to AC. The conversion of energy is done by Power electronic converters which play a key role in photovoltaic systems that are integrated with energy storage systems such as batteries. These converters allow efficient charging and discharging of batteries, voltage regulation, and synchronization with the grid. DC to DC conversion requires DC to DC converters. To obtain the maximum power from the converter the switching of the power electronics device plays a major role by controlling the time duration of the switch and the output power can be maximized. In this work particle swarm metaheuristic algorithm is used to generate the duty ratio and a PWM pulse generator is used to generate the triggering pulses for the switch. A detailed analysis of the ZETA converter is done with PV as input and EV as application. A 5-by-5 PV system with a Zeta converter is simulated in a MATLAB environment. The simulation results show that the ripples in output are minimal which supports the smooth and efficient charging of EV battery which promotes the use of clean energy.

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Nayanasiri, Dulika, and Yunwei Li. "Step-Down DC–DC Converters: An Overview and Outlook." Electronics 11, no. 11 (May 26, 2022): 1693. http://dx.doi.org/10.3390/electronics11111693.

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Voltage step-down converters have gained attention, with the rapid development in industrial robotics, Internet of things, and embedded system applications. Therefore, a comprehensive analysis has been performed, to identify the topologies and architectures used in step-down converters. Moreover, their operation and performance have been compared. Such an analysis is helpful, in improving performance of the existing systems, besides designing novel converter topologies. Furthermore, the converter-topology-derivation methods have been studied, to identify their applicability for synthesising novel non-isolated DC–DC converters.

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Almakhles, Dhafer, Divya Navamani Jayachandran, Lavanya Anbazhagan, Marwa Hannachi, and Jagabar Sathik Mohamed Ali. "Dynamic Analysis of Extendable Hybrid Voltage Lift DC–DC Converter for DC Microgrid." Processes 10, no. 12 (December 9, 2022): 2652. http://dx.doi.org/10.3390/pr10122652.

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This paper proposes a novel non-isolated high voltage gain dc–dc converter with a boost2 (B2) technique. The derived single-switch hybrid voltage-lift topology generates a higher voltage conversion ratio with less component counts than traditional voltage-lift converters. Furthermore, to show its superiority, the proposed topology is compared with other recent non-isolated dc–dc converters in terms of the number of power components such as inductors, capacitors, diodes, and switches. Moreover, the voltage stress across the power switch is less than the output voltage, which results in using low-rated components and reducing the converter cost. The steady-state analysis of the proposed topology is carried out with the operating modes in continuous and discontinuous conduction modes. The critical inductance for the proposed converter is derived for design considerations. Compared to the other traditional step-up converters, the stresses across the power diodes are highly reduced. The analysis related to the addition of an expander cell with the topology is performed concerning boundary conditions. An efficiency model with loss calculation is presented. Furthermore, the reliability analysis is performed with the military handbook to determine the failure rate of the converter’s components. Finally, the simulation and 50 W prototype model for experimental validation prove the strength of the proposed topology.

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Demirdelen, Tuğçe, R. İlker Kayaalp, and Mehmet Tümay. "Modelling and Analysis of Bidirectional DC-DC Converter." International Journal for Innovation Education and Research 3, no. 12 (December 31, 2015): 16–30. http://dx.doi.org/10.31686/ijier.vol3.iss12.483.

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Bidirectional dc-dc converters are used lots of industrial areas such as electric vehicles, uninterruptable power supplies, fuel cells, solar panel cells as energy sources are searched in order to improve the quality of power at the transmission, distribution lines and other areas. The main contribution of this paper, applying the most common used control method on single phase isolated bidirectional full bridge dc-dc converter and comparing this control method (Extended Phase Shift – EPS) on efficiency way by with/without using snubber capacitors. In this paper, Isolated Bidirectional DC-DC Converter topology is modelled and controller algorithm is written by FORTRAN programming language. According to the results, it is observed that efficiency result of the converter, using snubber capacitors in the converter topology has higher performance than the snubberless system.

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Wang, Dian Long, Zhi Yang Zhang, and Shu Qi Liu. "Analysis on some Key Problems of High Power DCDC Converter for Fuel Cell Electrical Bus." Advanced Materials Research 860-863 (December 2013): 839–42. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.839.

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The significance of researching on fuel cell electrical vehicle (FCEV) DC/DC converter, FCEV driving system structure and requirement with DC/DC converter are introduced firstly. Some key problems of development in FCEV DC/DC converter are particularly analyzed, including of reliability, efficiency, static and dynamic characteristic, etc. The average efficiency of boost or buck circuit can reach more than 95%. The dynamic response time of DC/DC converter is below 160 ms. All kinds of DC/DC converters operate with zero error, and various technical indicators can satisfy the operating requirement. The converters are successfully used in china fuel cell city buses and technical indexes are fulfilled.

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Upendar, Jalla, Sangem Ravi Kumar, Sapavath Sreenu, and Bogimi Sirisha. "Implementation and study of fuzzy based KY boost converter for electric vehicle charging." International Journal of Applied Power Engineering (IJAPE) 11, no. 1 (March 1, 2022): 98. http://dx.doi.org/10.11591/ijape.v11.i1.pp98-108.

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Elecetric vehicle batteries require direct current (DC) current for charging; hence the circuit alternating current (AC) is converted to DC by a battery charger. Battery charger mostly consists of a rectifier and DC-DC converter with a controller built in to serve as a protective circuit. A harmonic source load is a type of electric car charger. During the AC-DC change over method, harmonic current is introduced into the power system, affecting power quality. In this study, a charging station consisting of buck boost and a charging station consisting a KY Boost converter were simulated. To maintain output voltage of DC-DC converters constant controller is used, the controller is either PI or fuzzy logic controller. So, four models are developed and simulated which are buck-boost converter controlled by proportional-integral (PI)-controller, KY-boost converter controlled by proportional integral-controller, buck boost converter controller fuzzy logic controller and KY boost-converter controlled by fuzzy logic controller. The total harmonic distortion (THD) of the four models is compared.

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Thilothama, P., and D. Ashokaraju. "High Gain DC-DC Converter for Photovoltaic System." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 07 (July 20, 2024): 1–10. http://dx.doi.org/10.55041/ijsrem36526.

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The, high-gain DC–DC converters dragged much attention among the researchers. But there is a concern that high-gain converters have less efficiency and high switching stresses. The converter topology has two quasi-impedance source network and a voltage multiplier cell unit to facilitate very high-gain output voltage. The input variations due to varying irradiation of photovoltaic are alleviated by employing the perturb and observe maximum power point tracking mechanism. The simulation of the work is realized in MATLAB/ Simulink arena, and hardware circuits are validated using the dsPIC30F2010 controller. Key Words: High-gain DC–DC converter, non-linear carrier controller, voltage regulation, perturb and observe maximum power point tracking, solar photovoltaic

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V, Triveni. "Design Of Dc -Dc Boost Converter for PV System." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 04 (April 6, 2024): 1–5. http://dx.doi.org/10.55041/ijsrem30188.

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Out of all types of energies electrical energy has high demand universally. So, technologies are developed to convert other forms of energy into electrical energy. Depletion in fossil fuels forces the world to derive energy from renewable energy sources like solar, wind, biomass, etc.., .out of all renewable energy sources solar energy has more advantages. As long as the sun is present, we can derive electrical energy. So, PV technologies are developed to convert solar energy directly into electrical energy. A PV system converts solar energy directly into electrical energy and various components of the solar system are PV system, DC-DC converter, Maximum power point technique controllers. In PV systems generated voltage is at a very low level. To enhance this low voltage level to required voltage level boost converters are introduces in PV systems.in addition to boost up the generated voltage level to required level, boost converters can also be used in a tracking maximum power along with MPPT technique. NOT all boost converter work for all systems .so for constructing a PV system we have to design a suitable boost converter .in the present work we studied design aspects of dc-dc boost converter, and we designed dc-dc boost converter for a PV system. Key Words: Photovoltaic system Photovoltaic cell modelling Design DC-DC boost Converter

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AXELROD, B., Y. BERKOVICH, and A. IOINOVICI. "TRANSFORMERLESS DC–DC CONVERTERS WITH A VERY HIGH DC LINE-TO-LOAD VOLTAGE RATIO." Journal of Circuits, Systems and Computers 13, no. 03 (June 2004): 467–75. http://dx.doi.org/10.1142/s0218126604001556.

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By splitting the output capacitor of a basic boost converter, and combining the resulting capacitors with the main switch in the form of a switched-capacitor circuit, a new step-up structure is realized. Without using a transformer, a high line-to-load DC voltage ratio is obtained. An output filter is added, as usual, in boost converters for getting a free-ripple output. The circuit compares favorably with a quadratic boost converter regarding the count of devices and efficiency, even if it presents a lower DC gain. A DC analysis of the novel converter is presented. Experimental and simulation results confirm the theoretical expectations. By increasing the number of capacitors in the switched-capacitor circuit, higher gains can be obtained. Versatility, high voltage gain and good transient response are the features of the proposed converter.

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ElMenshawy, Mena, and Ahmed Massoud. "Hybrid Multimodule DC-DC Converters for Ultrafast Electric Vehicle Chargers." Energies 13, no. 18 (September 21, 2020): 4949. http://dx.doi.org/10.3390/en13184949.

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To increase the adoption of electric vehicles (EVs), significant efforts in terms of reducing the charging time are required. Consequently, ultrafast charging (UFC) stations require extensive investigation, particularly considering their higher power level requirements. Accordingly, this paper introduces a hybrid multimodule DC-DC converter-based dual-active bridge (DAB) topology for EV-UFC to achieve high-efficiency and high-power density. The hybrid concept is achieved through employing two different groups of multimodule converters. The first is designed to be in charge of a high fraction of the total required power, operating at a relatively low switching frequency, while the second is designed for a small fraction of the total power, operating at a relatively high switching frequency. To support the power converter controller design, a generalized small-signal model for the hybrid converter is studied. Also, cross feedback output current sharing (CFOCS) control for the hybrid input-series output-parallel (ISOP) converters is examined to ensure uniform power-sharing and ensure the desired fraction of power handled by each multimodule group. The control scheme for a hybrid eight-module ISOP converter of 200 kW is investigated using a reflex charging scheme. The power loss analysis of the hybrid converter is provided and compared to conventional multimodule DC-DC converters. It has been shown that the presented converter can achieve both high efficiency (99.6%) and high power density (10.3 kW/L), compromising between the two other conventional converters. Simulation results are provided using the MatLab/Simulink software to elucidate the presented concept considering parameter mismatches.

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Nikolshin, M. Yu, A. V. Frunze, and V. K. Bityukov. "DC/DC converter to power spectral lamps." Russian Technological Journal 11, no. 5 (October 6, 2023): 81–93. http://dx.doi.org/10.32362/2500-316x-2023-11-5-81-93.

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Objectives. The paper describes the creation of a DC/DC converter for powering hollow cathode lamps widely used currently as highly stable sources of spectral lines in spectral absorption analyzers and other applications. Typically, mains power supplies are used for such lamps, since installations using hollow cathode lamps are manufactured as stationary. However, there are no principal obstacles to manufacturing portable versions by simply substituting the power supply. However, special attention should in this case be paid to the power supply of the spectral lamp itself, since the amplitude stability of the radiation depends on the smoothness of its supply voltage. Therefore, the development of the pulse DC/DC converter with high efficiency and low rippling is a relevant and expedient problem.Methods. The set task is solved by methods of mathematical calculations, circuit simulation in LTSpice XVII сomputer-aided design system, and experimental verification.Results. The structural and principal electrical circuit of a prototype converter is developed on the basis of a topological analysis of pulse DC/DC converters, along with its calculations and simulation, and a printed circuit board. The developed autonomous high-voltage DC/DC converter has a low ripple level (~250 mV) of the output voltage (~491 V) at a load current of ~20 mA to ensure highly stable radiation.Conclusions. The possibility of obtaining a high voltage when using the topology of a step-up DC/DC converter with a choke is demonstrated. The experimental verification confirmed the correctness of calculations and modeling of a high-voltage DC/DC converter for powering hollow cathode spectral lamps.

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Thulasiraman, Nivethaa, Lavanya Viswanathan, and Palanidoss Sriramalakshmi. "Review of DC-DC boost converter derived topologies for renewable energy applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 15, no. 2 (June 1, 2024): 947. http://dx.doi.org/10.11591/ijpeds.v15.i2.pp947-957.

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This paper deals with three different power converter topologies for boosting the available dc input voltage. The converters considered for the study are conventional DC-DC boost converter, quasi switched boost DC-DC converter (qSBC) and quasi Z source converter (qZSC). The converters are designed for an input voltage of 24 V to deliver a power of 200 W to a resistive load. The steady-state analysis of all three topologies is discussed to determine the key characteristics of the proposed topologies. All the converters are simulated in MATLAB/Simulink environment and the outcomes are explained in detail. The performance comparison of the converters such as switch stress, diode stress and boost factor versus duty ratio are presented. Thus, this comparison helps to choose a suitable boost converter topology for a specific application.

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Ferreira, José. "DC/DC Boost Converter Controller." U.Porto Journal of Engineering 3, no. 3 (March 27, 2018): 53–59. http://dx.doi.org/10.24840/2183-6493_003.003_0007.

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The DC/DC boost converter is described as a time variant system. State-Space is one of the methods used to approach a time variant system to an invariant time linear system. The present document focuses on a comparative approach of output voltage regulation and system stability and performance. For this document, there were made MatLab tests of PI and PD controllers, with and without fuzzy control.

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Akherraz, M. "IGBT Based DC/DC Converter." Sultan Qaboos University Journal for Science [SQUJS] 2 (December 1, 1997): 49. http://dx.doi.org/10.24200/squjs.vol2iss0pp49-56.

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This paper presents an in-depth analytical and experimental investigation of an indirect DC-DC converter. The DC-AC conversion is a full bridge based on IGBT power modules, and the AC-DC conversion is done via a high frequency AC link and a first diode bridge. The AC link, which consists of snubbing capacitors and a variable air-gap transformer, is analytically designed to fulfill Zero Voltage commutation requirement. The proposed converter is simulated using PSPICE and a prototype is designed built and tested in the laboratory. PSPICE simulation and experimental results are presented and compared.

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Birca-Galateanu, S. "Buck-flyback DC-DC converter." IEEE Transactions on Aerospace and Electronic Systems 24, no. 6 (1988): 800–807. http://dx.doi.org/10.1109/7.18647.

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Homeyer, W. G., R. J. Callanan, E. E. Bowles, and A. Nerem. "1.2 MW DC-DC converter." IEEE Transactions on Magnetics 29, no. 1 (January 1993): 992–96. http://dx.doi.org/10.1109/20.195714.

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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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Journal articles on the topic 'DC-DC Converter'

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