Artigos de revistas: "Multi-phase DC/DC converter"

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Hinov, Nikolay, e Tsvetana Grigorova. "Design Considerations of Multi-Phase Buck DC-DC Converter". Applied Sciences 13, n.º 19 (8 de outubro de 2023): 11064. http://dx.doi.org/10.3390/app131911064.

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The main objective of this article is to propose a rational methodology for designing multi-phase step-down DC-DC converters, which can find applications both in engineering practice and in power electronics education. This study discusses the main types of losses in the multi-phase synchronous buck converter circuit (transistors’ conduction losses, high-side MOSFET’s switching losses, reverse recovery losses in the body diode, dead time losses, output capacitance losses in the MOSFETs, gate charge losses in MOSFETs, conduction losses in the inductor, and losses in the input and output capacitors) and provides analytical dependencies for their calculation. Based on the control examples for applications characterized by low voltage and high output current, the multi-phase buck converter’s output and input current ripples are analyzed and compared analytically and graphically (3D plots). Furthermore, graphical results of the converter efficiency at different numbers of phases (N = 2, 4, 6, 8, and 12) are presented. An analysis of the impact of various parameters on power losses is conducted. Thus, a discussion on assessing the factors influencing the selection of the number of phases in the multi-phase synchronous buck converter is presented. The proposed systematized approach, which offers a fast and accurate method for calculating power losses and overall converter efficiency, reduces the need for extensive preliminary computational procedures and achieves optimized solutions. Simulation results for investigating power losses in 8-phase multi-phase synchronous buck converters are also presented. The relative error between analytical and simulation results does not exceed 4%.

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Krishna, P. Mohan. "DESIGN OF MULTI-PORT DC-DC CONVERTER". INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, n.º 06 (9 de junho de 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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Harimon, M. A., A. Ponniran, A. N. Kasiran e H. H. Hamzah. "A Study on 3-phase Interleaved DC-DC Boost Converter Structure and Operation for Input Current Stress Reduction". International Journal of Power Electronics and Drive Systems (IJPEDS) 8, n.º 4 (1 de dezembro de 2017): 1948. http://dx.doi.org/10.11591/ijpeds.v8.i4.pp1948-1953.

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This paper analyses a 3-phase interleaved DC-DC boost converter for the conversion of low input voltage with high input current to higher DC output voltage. The operation of the 3-phase interleaved DC-DC boost converter with multi-parallel of boost converters is controlled by interleaved of switching signals with 120 degrees phase-shifted. Therefore, with this circuit configuraion, high input current is evenly shared among the parallel units and consequently the current stress is reduced on the circuit and semiconductor devices and contributes reduction of overall losses. The simulation and hardware results show that the current stress and the semiconductor conduction losses were reduced approximately 33% and 32%, respectively in the 3-phase interleaved DC-DC boost converter compared to the conventional DC-DC boost converters. Furthermore, the use of interleaving technique with continuous conduction mode on DC-DC boost converters is reducing input current and output voltage ripples to increase reliability and efficiency of boost converters.

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Kumar, Mukesh, Manoj Kumar Dewangan e Maheedhar Dubey. "Implementation on Modeling and Analysis of Multi Stage with Multi Phase DC-DC Boost Converter". International Journal of Advance Research and Innovation 9, n.º 1 (2021): 35–43. http://dx.doi.org/10.51976/ijari.912106.

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In this paper, a new version of the new Hybrid Boost DC-DC ready to draw power from two different DC sources for standard DC-bus feeds is presented. An important feature of the proposed converter is that both sources provide simultaneous power to a lower load than the reduced current rate. This feature is very attractive for DC grid applications. With the analysis of the time zone, steadystate performance is established and the transformational power correction parameters are obtained. In this paper, a powerful converter is introduced, with its operating principles based on charging pumps and converters of reinforcement series. In addition, although three switches are used, no separate gate driver is required instead of one bridge gate driver and one gate driver on the lower side. As such, the proposed converter is easy to analyze and easy to operate. In addition, additional test results are provided to confirm the effectiveness of the proposed converter.

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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 (31 de dezembro de 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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Verma, Vipin, e Aruna Patel. "(MIMO Buck Converter) Multi-Input Multi-Output DC-DC Buck Converter". International Journal for Research in Applied Science and Engineering Technology 12, n.º 3 (31 de março de 2024): 691–96. http://dx.doi.org/10.22214/ijraset.2024.58908.

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Abstract: Designs of the power electronics circuitry are nowadays reducing the size, space, and weight of converter and inverter circuits. This is possible because of the availability of new high-switching frequency devices. This paper presents a generalized model of buck converters that is multi-input multi-output(MIMO) fixed and variable. The converter used for stepping down the voltage is called a buck converter. The buck converter is designed, analyzed simulated & developed. The proposed model of this Buck converter consists of two parts: (a) Main converter circuits with the components like switch, inductor, diode, capacitor, and load, (b) A control circuit for controlling the operation of the switch using 10 10-turn potentiometer. This model can accurately give the power output voltage.

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Liu, Zhengxin, Jiuyu Du e Boyang Yu. "Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles". World Electric Vehicle Journal 11, n.º 4 (7 de outubro de 2020): 64. http://dx.doi.org/10.3390/wevj11040064.

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Direct current to direct current (DC/DC) converters are required to have higher voltage gains in some applications for electric vehicles, high-voltage level charging systems and fuel cell electric vehicles. Therefore, it is greatly important to carry out research on high voltage gain DC/DC converters. To improve the efficiency of high voltage gain DC/DC converters and solve the problems of output voltage ripple and robustness, this paper proposes a double-boost DC/DC converter. Based on the small-signal model of the proposed converter, a double closed-loop controller with voltage–current feedback and input voltage feedforward is designed. The experimental results show that the maximum efficiency of the proposed converter exceeds 95%, and the output voltage ripple factor is 0.01. Compared with the traditional boost converter and multi-phase interleaved DC/DC converter, the proposed topology has certain advantages in terms of voltage gain, device stress, number of devices, and application of control algorithms.

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Faraj, Karrar Saad, e Jasim F. Hussein. "Analysis and Comparison of DC-DC Boost Converter and Interleaved DC-DC Boost Converter". Engineering and Technology Journal 38, n.º 5A (25 de maio de 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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Zhou, Shijia, Fei Rong, Zhangtao Yin, Shoudao Huang e Yuebin Zhou. "HVDC Transmission Technology of Wind Power System with Multi-Phase PMSG". Energies 11, n.º 12 (26 de novembro de 2018): 3294. http://dx.doi.org/10.3390/en11123294.

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The high voltage DC (HVDC) transmission technology of wind power system, with multi-phase permanent magnetic synchronous generator (PMSG) is proposed in this paper. Each set of three-phase winding of the multi-phase PMSG was connected to a diode rectifier. The output of the diode rectifier was connected by several parallel isolated DC–DC converters. Each DC–DC converter was connected to a sub-module (SM). All SMs and two inductors were connected in a series. The proposed wind power system has several advantages including, transformerless operation, low cost, low voltage stress, and high fault tolerance. The maximum power point tracking (MPPT) and energy balance of the DC–DC converters were achieved by controlling the duty cycles of the DC–DC converters. The HVDC transmission was achieved by the nearest level control (NLC) with voltage sorting. The simulation model with 18-phase PMSG was established. Experimental results were also studied based on RT-Lab.

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Ankur Kumar, Gupta, Mitra Uliya e Verma Hemant Kumar. "A study of converter configurations for vehicular applications". Trends in Computer Science and Information Technology 9, n.º 1 (20 de fevereiro de 2024): 010–22. http://dx.doi.org/10.17352/tcsit.000075.

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Renewable energy sources like hydro, wind, geothermal and solar along with fuel cells are nowadays solutions to the global energy crisis, environmental issues, and fossil fuel exploitation. The nature of the output of these renewable sources is D.C. The role of DC-DC converters in the integration of energy sources with microgrids is vital. These converters find their major applications in power generation, energy systems, vehicular applications, portable electronic devices, aerospace, etc. These converters help to boost the voltage and improve the reliability, stability, efficiency, and performance of the system. This study gives a brief overview of three DC-DC converters of non-isolated topology. They are: Clamped H-type boost DC-DC converter, Multi-Port Dual-Active-Bridge DC-DC Converter, and Four-Phase Interleaved Four-Switch Buck-Boost Converter. This study will make researchers learn and make their concept clear about the operation, performance, and usage of these converters.

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Tan, Zhong Yih, Nadia Mei Lin Tan e Ida Suzana Hussain. "Theoretical Analysis of a Three-Phase Bidirectional Isolated DC-DC Converter Using Phase-Shifted Modulation". International Journal of Power Electronics and Drive Systems (IJPEDS) 9, n.º 2 (1 de junho de 2018): 495. http://dx.doi.org/10.11591/ijpeds.v9.i2.pp495-503.

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A three-phase bidirectional isolated dc-dc converter consists of two six-pulse two-level active converters that enable bidirectional power flow by introducing a lag phase-shift angle of one converter with respect to the other converter. This paper explains the operating modes of a three-phase bidirectional isolated dc-dc converter in detail, taking into account the transfer of energy between the dc voltage sources and high-frequency ac inductances in the three-phase bidirectional isolated dc-dc converter. The power flow of the dc-dc converter is also examined based on the operating modes.

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Zhang, Jingzhang, Shujun Chen, Hongyan Zhao, Yue Yu e Mingyu Liu. "Designing a Multi-Output Power Supply for Multi-Electrode Arc Welding". Electronics 12, n.º 7 (4 de abril de 2023): 1702. http://dx.doi.org/10.3390/electronics12071702.

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Multi-output power converters using different architectures can have significant efficiency advantages. This paper proposes a multi-output welding power supply that is based on the middle DC converter distributed architecture. This machine includes two converter groups, and each group comprises a three-phase rectifier unit, a full-bridge converter unit, a HF (high frequency) transformer, a rectifier unit, and a chopper converter unit. Among these units, the three-phase rectifier unit, full-bridge converter unit, HF transformer, and rectifier unit convert three-phase AC voltage into a low voltage, and the chopper converter unit converts the low voltage into the required current. The welding power supply can output four DC and two AC currents. This paper also analyzes the stability of the welding power supply. Finally, a prototype is designed and verified through experiments, and the maximum output of the prototype is 300 A. The experimental results show that the converter can output different DC and AC currents according to the requirement, the multiple outputs are independent of the others, and the output phase and value are independently adjustable. After verification, the proposed multi-output welding power supply can output steady current according to the requirement.

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S, Chellam, Kuruseelan S e Jasmine Gnanamalar A. "Wind Energy Conversion System using Cascading H-Bridge Multilevel Inverter in High Ripple Scenario". International Journal of Electrical and Electronics Research 12, n.º 1 (15 de março de 2024): 178–86. http://dx.doi.org/10.37391/ijeer.120126.

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This paper presents wind energy conversion system using CHB MLI and phase interleaved boost converter to overcome high voltage and current ripple. Developments in power electronics technology have a direct impact on advances in wind energy conversion systems. WECS output voltage may fluctuate depending on wind speed. For WECS to maintain a constant output voltage, a power converter is required. This paper explains how to configure a phase-interleaved boost converter and voltage controller to maintain a stable intermediate circuit voltage in the system. The proposed cascading H-bridge multilevel inverter (CHB MLI) converts DC/AC using a novel topology. Separate DC sources are not utilizing the suggested topology. Multi-level inverters are operated by specific harmonic disposal pulse width modulation, or SHE-PWM are utilized. PMSG voltage, CHB-MLI voltage, boost converter voltage and rotor speed have seven different levels of simulated waveforms. Among the many advantages of three-phase alternating DC-DC boost converters, that are high efficiency, fast dynamics and very low current ripple. The output voltage is increased to 400 V using a three-phase interleaving converter, which also maintains a higher efficiency of about 98%. DC-DC power converters have proven to be essential components of many applications and topologies. The interleaving technique is necessary to address the main disadvantages of DC-DC power converters: increased voltage, reduced efficiency, and rippled current. Interleaved boost converters have several advantages, including lower switching losses, lower voltage and current ripple, increased efficiency, and more. To improve the converter's overall functionality, the "n" parallel converter is connected through an interleaved boost converter. This paper presents a performance analysis of a multiphase alternating boost converter to reduce high voltage and current ripple. MATLAB/Simulink is used for analysis and simulation of phase-interleaved boost converters.

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Ghazali, Mohd Shukri bin Mohd, Rahimi Bin Baharom, Khairul Safuan Bin Muhammad e Dylan Dah-Chuan Lu. "Computer simulation model of multi-input multi-output converter using single-phase matrix converter". International Journal of Power Electronics and Drive Systems (IJPEDS) 13, n.º 2 (1 de junho de 2022): 1047. http://dx.doi.org/10.11591/ijpeds.v13.i2.pp1047-1055.

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This paper presents a multi-input, multi-output power converter system using a single-phase matrix converter (SPMC) circuit topology. In particular, this technology is of vital importance in floating production such as offshore oil and gas platforms where space is crucial, therefore requiring a reduction in equipment size and weight. The proposed circuit topology only employed a single circuit to perform energy conversion of direct current (DC) to alternating current (AC), DC to DC, AC to DC, and AC to AC operations, thus can reduce the power losses resulting in high power density. As a result, it can promise technological advancement and convergence, hence, support the manufacturing sector transition to industry 4.0, and in line with the United Nation’s sustainable development goals. The proposed converter model will be validated in terms of electrical circuit operations through the computer simulation (MATLAB/Simulink) software.

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Saadatizadeh, Zahra, Pedram Chavoshipour Heris, Mehran Sabahi e Xiaodong Liang. "Multi‐input multi‐phase transformerless large voltage conversion ratio DC/DC converter". International Journal of Circuit Theory and Applications 49, n.º 12 (30 de setembro de 2021): 4294–315. http://dx.doi.org/10.1002/cta.3117.

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Choi, Jung-Sik, Byung-Chul Park, Dong-Hwa Chung e Seung-Yeol Oh. "Study on the High Efficiency Bi-directional DC/DC Converter Topology Using Multi-Phase Interleaved Method". Journal of the Korean Institute of Illuminating and Electrical Installation Engineers 29, n.º 2 (28 de fevereiro de 2015): 82–90. http://dx.doi.org/10.5207/jieie.2015.29.2.082.

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Mehida, Hicham, Abdennacer Aboubou e Mohamed Yacine Ayad. "Reliability improvement of multi-phase interleaved DC-DC converters for fuel cell electric vehicle applications". Bulletin of Electrical Engineering and Informatics 12, n.º 5 (1 de outubro de 2023): 2553–60. http://dx.doi.org/10.11591/eei.v12i5.4674.

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This paper suggests a fast and low-cost method that can be applied in several DC/DC converter topologies for detecting open circuit faults (OCFs) and short circuit faults (SCFs). The suggested method may identify the faults of several power switches even if they occur simultaneously in multi-phase interleaved boost converters (MPh-IBC) by using just the sensors needed to control the converter. This fault detection method (FDM) is based mainly on comparing the measured inductor current and two fault detection thresholds, one for OCFs detection and the other for SCFs detection. This method combined with a corrective strategy to mitigate the negative impacts of OCFs, particularly the significant rise in the ripple of the DC bus voltage and the fuel cell (FC) current, which reduces FC aging and converter reliability. The simulation findings indicate the FDM's excellent performance and speed, as well as its usefulness in detecting defects of many power switches in the converter, with a fault detection time of up to 1.7 µs. The acquired findings further show the excellent effectiveness of the corrective strategy in reducing these ripples in the event of one or two faults.

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Subramaniyan, Geethanjali, Vijayakumar Krishnasamy e Jagabar Sathik Mohammed. "Modeling and Design of Split-Pi Converter". Energies 15, n.º 15 (5 de agosto de 2022): 5690. http://dx.doi.org/10.3390/en15155690.

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High-power bidirectional dc–dc converters are being widely employed in renewable energy interfacing, energy storage, electric vehicle charging, military, aerospace, and marine applications. Among various bidirectional topologies documented in the literature for dc–dc power conversion, the split-pi converter invites special attention with regard to applications involving multi-phase systems requiring high-power density. This paper endeavors to present the small-signal modeling of the split-pi converter in its various operating modes. Subsequently, the dynamic characteristics of the converter are studied, and appropriate control design is presented for stable operation of the converter. Frequency response plots are illustrated, and a hardware prototype model of the converter is designed and implemented.

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Mohan, Dr T. Murali. "Closed-Loop Control of a New High Step-Up Multi-Input Multi-Output DC-DC Converter". International Journal for Research in Applied Science and Engineering Technology 9, n.º 11 (30 de novembro de 2021): 1281–98. http://dx.doi.org/10.22214/ijraset.2021.38988.

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Abstract: A new multi-input multi-output dc-dc converter with high step-up capability for wide power ranges is proposed in this paper. The converter's number of inputs and outputs is arbitrary and independent of each other. The proposed topology combines the benefits of DC-DC boost and switched-capacitor converters. The number of input, output, and voltage multiplier stages is arbitrary and depends on the design conditions. First, the various operating modes of the proposed converter are discussed. The closed-loop control system also must be designed using state space representation and small-signal modelling. Finally, the operation of the proposed converter is derived from the simulation results. Keywords: High power converter, Low voltage stress, Multi-Input Multi-Output (MIMO) converter, Non-isolated high step-up dc-dc converter, closed loop control.

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Koneh, Norbert Njuanyi, Jae-Sub Ko e Dae-Kyong Kim. "Simulations of the Comparative Study of the Single-Phase Shift and the Dual-Phase Shift-Controlled Triple Active Bridge Converter". Electronics 11, n.º 20 (12 de outubro de 2022): 3274. http://dx.doi.org/10.3390/electronics11203274.

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This paper presents a comparative study between the traditional phase shift (also referred to as the Single-Phase Shift (SPS)) and the Dual-Phase Shift (DPS) controlled Triple Active Bridge (TAB) converter. Being a multi-port DC-DC converter with flexible power flow control and characterized by high power density, the TAB converter is applicable in almost any situation where a DC-DC converter is needed. With the availability of multiple control schemes, this work highlights the advantages and disadvantages of the most employed control scheme used on the TAB converter, in comparison with the DPS control scheme that has so far been applied only on Dual-Active Bridge (DAB) converters. As an example, for a TAB converter with a 14 kW maximum power capacity, the work sees the comparison of the backflow power, the maximum possible current, the processed power at the different ports of the converter, the transformer voltage and current waveforms, and the Total Harmonic Distortion (THD). Based on the results obtained, we found that the DPS-controlled TAB converter was more efficient when applied to the TAB converter compared to the traditional phase shift control algorithm.

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Kumar, Chinta Anil, Kandasamy Jothinathan e Lingineni Shanmukha Rao. "A novel SIMIDCBC topology driven PMSM for PEV application". International Journal of Applied Power Engineering (IJAPE) 13, n.º 1 (1 de março de 2024): 66. http://dx.doi.org/10.11591/ijape.v13.i1.pp66-80.

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Nowadays, the usage of renewable energy based electric vehicles is increased for reducing CO2 emissions, usage of fossil fuels, energy saving, and transportation cost. As a result, it becomes the most significantly run with combined energy sources and it is good choice which minimizes the energy consumption from charging stations. The available renewable energy is integrated to power-train through power-electronic interface; such interface consists of three-phase inverter with DC-DC boost converter. The combined energy sources like solar-PV/battery are integrated to power-train by employing multi-input non-isolated step-up DC-DC converter for providing continuous power to drive the vehicle. The multi-terminal topologies have efficient, reliable performance, continuous input current, high step-up gain over the conventional DC-DC converters. In this work, a unique framework of combined energy powered switched-inductor based multi-input DC boost converter topology has been proposed to drive the PMSM. The performance of proposed SIMIDCBC topology driven PMSM for PEV application under constant and variable speed conditions are verified by using MATLAB/Simulink tool, simulation results are presented.

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Alhamrouni, Ibrahim, Mohamed Salem, Younes Zahraoui, Basilah Ismail, Awang Jusoh e Tole Sutikno. "Multi-input interleaved DC-DC converter for hybrid renewable energy applications". Bulletin of Electrical Engineering and Informatics 11, n.º 3 (1 de junho de 2022): 1765–78. http://dx.doi.org/10.11591/eei.v11i3.3779.

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The increasing demand for hybrid energy systems based on renewable energy sources has enabled the new dimension for multi-input converter (MIC). Various topologies have been introduced over the last decade. However, most of these topologies have several drawbacks in terms of design complexity or efficiency. Therefore, this research aims to introduce a multi-input DC-DC converter for hybrid renewable energy applications. The proposed multi-input converter is able to hybridize different sources such as solar PV array and PEMFC. Analysis and simulation have been carried out for the double input two-phase interleaved converter in operating the boost mode. The proposed converter is designed in matlab simulink by using interleaved boost converter method to achieve a boosted and smoothened output. The proposed topology has shown a remarkable performance in terms of output voltage boosting, voltage ripple reduction as well as enhanced efficiency through interleaved boosting technique. From the simulation results, it can be observed that the proposed converter can gain high efficiency which is higher than 97%. The obtained results have been validated with previously published works and the proposed technique has been proven to yield compatible and improved outcomes.

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Demirdelen, Tuğçe, R. İlker Kayaalp e Mehmet Tümay. "Modelling and Analysis of Bidirectional DC-DC Converter". International Journal for Innovation Education and Research 3, n.º 12 (31 de dezembro de 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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Ren, Chunguang, Yapeng He, Yue Qin, Yue Hui, Xinqi Li, Xiaoqing Han e Xiangning He. "A Novel Modular Sigma DC/DC Converter with a Wide Input Voltage Range". Electronics 13, n.º 5 (6 de março de 2024): 995. http://dx.doi.org/10.3390/electronics13050995.

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A modular Sigma DC/DC converter with wide input voltage range is proposed in this paper. The proposed converter is combined with a traditional LLC converter and two multi-resonant converters via Sigma architecture. Among them, the traditional LLC converter operates as a DC transformer (DCX) at resonant frequency to achieve maximum efficiency. Meanwhile, one of the multi-resonant converters, the DC to DC (D2D) part of the Sigma structure, is responsible for voltage regulation over a wide input voltage range. In addition, the other multi-resonant converter has two operation modes, including DCX and D2D. When it operates in the DCX mode, the Sigma converter has better performance and higher efficiency. When it operates in the D2D mode, the Sigma converter can handle a wider input voltage range. For each submodule, the operation principle and characteristics of the proposed Sigma converter are analyzed in detail. In addition, some key points of the parameter design for each part are also demonstrated. Finally, an experimental prototype with an input voltage of 540~1100 V is built to verify the effectiveness of the proposed converter.

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Gabbar, Hossam A., e Abdalrahman Elshora. "Modular Multi-Input DC/DC Converter for EV Fast Charging". Technologies 10, n.º 6 (7 de novembro de 2022): 113. http://dx.doi.org/10.3390/technologies10060113.

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In this paper, a modular multi-input, single output DC/DC converter is proposed to enhance the energy management of a fast-charging station for electric vehicles (EVs). The proposed bidirectional converter can work in different modes of operation with fewer components and a modular design to extend the input power sources and increase the charging power rate. The converter has several merits compared to the conventional converters, such as centralizing the control, reducing power devices, and reducing power conversion stages. By using MATLAB/Simulink, the converter was tested in many operation modes and was used to charge a Nissan Leaf EV’s battery (350 V, 60 Ah) from hybrid sources simultaneously and individually in power up to (17 kW). In addition, it was tested on a hardware scale at a low power rate (100 W) for the validation of the simulation work and the topology concept. In addition, its different losses and efficiency were calculated during the different operation modes.

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Sampath, Suresh, Zahira Rahiman, Sharmeela Chenniappan, Elango Sundaram, Umashankar Subramaniam e Sanjeevikumar Padmanaban. "Efficient Multi-Phase Converter for E-Mobility". World Electric Vehicle Journal 13, n.º 4 (13 de abril de 2022): 67. http://dx.doi.org/10.3390/wevj13040067.

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The recent growth of battery-powered applications has increased the need for high-efficiency step-up dc-dc converters. The step-up conversion is commonly used in several applications, such as electric vehicle (EV); plug-in hybrid electric vehicles (PHEV); photovoltaic (PV) systems; uninterruptible power supplies (UPS); and fuel cell systems. The input current is shared among inductors by paralleling the converters; resulting in high reliability and efficiency. In this paper; a detailed analysis for reducing power loss and improving efficiency is discussed. In continuous conduction mode; the converters are tested with a constant duty cycle of 50%. The multi phase interleaved boost converter (MPIBC) is controlled by interleaved switching techniques; which have the same switching frequency but phases are shifted. The efficiency of the six phase IBC model is 93.82% and 95.74% for an input voltage of 20 V and 200 V, respectively. The presented six phase MPIBC is validated by comparing it with the existing six phase IBC. The result shows that the presented converter is better than the existing converter. The prototype of the two phase and six phase IBC is fabricated to test the performance. It is found that the output power at the load end is highest for the 5 kHz switching frequency.

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Rahimi, Tohid, Hossein Jahan, Frede Blaabjerg, Amir Bahman e Seyed Hosseini. "Fuzzy-Logic-Based Mean Time to Failure (MTTF) Analysis of Interleaved Dc-Dc Converters Equipped with Redundant-Switch Configuration". Applied Sciences 9, n.º 1 (27 de dezembro de 2018): 88. http://dx.doi.org/10.3390/app9010088.

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Interleaved dc-dc converters in sensitive applications necessitate an enhanced reliability. An interleaved converter equipped with redundant components can fulfill the reliability requirements. Mean Time to Failure (MTTF), as a reliability index, can be used to evaluate the expected life span of the mentioned converters. The Markov model is a helpful tool to calculate the MTTF in such systems. Different scientific reports denote different failure rates with different weight for power elements. Also, in reliability reports, failure rates of active and passive components are uncertain values. In order to approximate the failure rates fuzzy-logic-based Markov models are proposed in this paper. Then it is used to evaluate the MTTF of an interleaved multi-phase dc-dc converter, which is equipped with parallel and standby switch configurations. For the first time, fuzzy curves for MTTFs of the converters and 3D reliability function are derived in this paper. The reliability analyses give an insight to find the appropriate redundant-switch configurations for interleaved dc-dc converters under different conditions. Simulation and experimental results are provided to lend credence to the viability of the studied redundant-switch configurations in interleaved dc-dc boost converter.

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Guennouni, Nasr, Nadia Machkour e Ahmed Chebak. "Single- and Three-Phase Dual-Active-Bridge DC–DC Converter Comparison for Battery Electric Vehicle Powertrain Application". Energies 17, n.º 21 (4 de novembro de 2024): 5509. http://dx.doi.org/10.3390/en17215509.

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Dual-active-bridge (DAB) DC–DC converters are of great interest for DC–DC conversion in battery electric vehicle (BEV) powertrain applications. There are two versions of DAB DC–DC converters: single-phase (1p) and three-phase (3p) architectures. Many studies have compared these architectures, selecting the 3p topology as the most efficient. However, there is a gap in the literature when comparing both architectures when single-phase-shift (SPS) modulation is not used to drive the converter. The aim of this study was to compare 1p and 3p DAB DC–DC converters driven by optimal modulation techniques appropriate for BEV powertrain applications. Mathematical loss models were derived for both architectures, and their performances were compared. A case study of a 100 kW converter was considered as an example to visualize the overall efficiency of the converter for each layout. The 1p DAB DC–DC converter architecture outperformed the 3p layout in both its Y–Y and D–D transformer configurations. The higher performance efficiency, lower number of components, and reduced design complexity make the 1p DAB DC–DC converter topology a favorable choice for BEV powertrain applications.

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PRATYUSHA, ATLURI DEEPTHI, e L. RAVI SRINIVAS. "CUK-ZETA Multi-Input DC-DC Converter". International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering 3, n.º 11 (20 de novembro de 2014): 13176–85. http://dx.doi.org/10.15662/ijareeie.2014.0311034.

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Golovko, Sergey Vladimirovich, Artem Vladislavovich D'yachenko e Nickolay Gennadievich Romanenko. "Comparative analysis of thyristor schemes of marine DC motor control". Vestnik of Astrakhan State Technical University. Series: Marine engineering and technologies 2020, n.º 2 (22 de maio de 2020): 111–19. http://dx.doi.org/10.24143/2073-1574-2020-2-111-119.

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The article considers the problem of the DC motors control that are often used in many electric drive systems. Due to the progress of industrial electronics and technology it has become possible to develop more efficient motor control circuits. The conventional speed control methods commit power losses in the system, which can be minimized by using the power electronics strategy. There is considered the thyristor control of DC motors of the ship electric drive. The DC motor control systems are described and simulation models in the MATLAB Simulink program are presented. The thyristor methods for controlling a DC motor speed are listed: single-phase semi-controlled converter (for motors with power up to 15 kW); single-phase drive with a controlled converter (available to operate in two quadrants); three-phase semi-controlled converter; three-phase controlled converter; single-phase reverse converter realized by connecting two single-phase converters (ensuring multi-mode operation); three-phase reverse converter realized as a single-phase converter. The mechanical characteristic of a DC motor was illustrated when the voltage supplied to the armature winding changed. It has been stated that control of the armature voltage is more favorable for speeds below the rated speed; flow control is preferable for speeds above the nominal speed. It has been inferred that speed control by means of power electronics devices provides large energy savings, in contrast to the traditional speed control methods, since the traditional methods experience significant energy losses.

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İskender, İres, Yıldürüm Üçtug˘ e H. Bülent Ertan. "Steady‐state modeling of a phase‐shift PWM parallel resonant converter". COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 25, n.º 4 (1 de outubro de 2006): 883–99. http://dx.doi.org/10.1108/03321640610684051.

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PurposeTo derive an analytical model for a dc‐ac‐dc parallel resonant converter operating in lagging power factor mode based on the steady‐state operation conditions and considering the effects of a high‐frequency transformer.Design/methodology/approachA range of published works relevant to dc‐ac‐dc converters and their control methods based on pulse‐width‐modulation technique are evaluated and their limitations in output measurement of higher output voltage converters are indicated. The circuit diagram of the converter is described and the general mathematical model of the system is obtained by deriving and combining the mathematical models of the different converter blocks existing in the system. The derived mathematical model is used to study the steady‐state and transient performance of the converter. The deriving procedure of the analytical model for a parallel resonant converter is extensively given and the analytical model obtained is verified by simulation results achieved using MATLAB/SIMULINK and the program written by the authors.FindingsThe paper suggests an analytical model for dc‐ac‐dc parallel resonant converters. The model can be used in the output voltage estimation of a converter in terms of its phase‐shift angle and the dc‐link voltage.Research limitations/implicationsThe resources in the library of the authors' university and also the English resources relative to dc‐ac‐dc converters reachable through the internet were researched.Practical implicationsThe analytical model suggested can be used in estimating the output voltage of the converters used in high‐voltage applications or where there are difficulties in employing sensors in measurement of the output voltage due to high price or implementation problems.Originality/valueThe originality of the paper is to present an analytical model for dc‐ac‐dc parallel resonant converters. Using this model makes it possible to estimate the output voltage of the converter using the dc‐link voltage and the phase‐shift angle. The proposed model provides researchers to regulate the output voltage of the converters using feed‐forward control technique.

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Yang, Lung-Sheng, e Jing-Han Cai. "High Step-Up DC-DC Converter with Switched Multi-inductor Technique". International Journal of Electrical Energy 7, n.º 1 (junho de 2019): 15–20. http://dx.doi.org/10.18178/ijoee.7.1.15-20.

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原, 增泉. "Multi-Phase DC-DC Converter with Bi-Directional Power Flow Ability for FCEV". Journal of Electrical Engineering 07, n.º 01 (2019): 63–75. http://dx.doi.org/10.12677/jee.2019.71007.

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Pote, Dr Ravindra S. "Three Phase Grid Connected Inverter for Solar Photovoltaic Systems". International Journal for Research in Applied Science and Engineering Technology 10, n.º 8 (31 de agosto de 2022): 1619–24. http://dx.doi.org/10.22214/ijraset.2022.46467.

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Abstract: The main aim is to convert the Solar PV DC voltage into AC voltage by using 3 phase inverter and getting sinusoidal AC output voltage. To convert solar PV which is in DC needs to be converted into AC by using the devices like 3 phase inverter and boost converter. The solar PV is a variable DC that is to be converted into pure DC for which will convert variable DC to pure DC. The MPPT is designed and is applied to boost converter which increases the solar PV’s efficiency. Then the output of boost converter which is DC voltage is given to 3 phase inverter. The 3 phase inverter which is connected to output of boost converter will convert the DC voltage into AC and we get sinusoidal AC. A three-phase grid-connected inverter designed for a photovoltaic power plant that features a maximum power point tracking (MPPT) scheme based on fuzzy logic. The whole system simulate in MATLAB. This fuzzy MPPT will shows accurate and fast response, and is integrated in the inverter.

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Kawakami, Taichi, e Masayoshi Yamamoto. "Reduced-Order Method for Mathematical Modeling of Multi-Phase DC-DC Converter". IEEJ Transactions on Industry Applications 137, n.º 3 (2017): 207–12. http://dx.doi.org/10.1541/ieejias.137.207.

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Stachon, K., G. Dissertori, T. Gadek, M. Hansen, S. Lusin e W. Lustermann. "Modern high-availability multi-stage power distribution system for the CMS phase-2 upgrade". Journal of Instrumentation 18, n.º 02 (1 de fevereiro de 2023): C02053. http://dx.doi.org/10.1088/1748-0221/18/02/c02053.

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Abstract The operation of CMS at the HL-LHC requires an upgrade of the readout electronics. These new modern micro-electronics require power at precise voltages between 1.2 V and 2.5 V. We will deliver this power using a 3-stage system, comprising AC-DC conversion to 380 V DC followed by radiation-tolerant 12 V DC-DC power converters feeding radiation-hard point-of-load DC-DC converter. We have studied an industrial 380 V AC-DC conversion system, featuring hot-swappable 3 kW power modules, stackable up to ∼1 MW system. Such systems are candidates for the first conversion step, feeding custom power supplies accepting 400 V DC input voltage. Our tests on one of the commercially available systems purchased from Eltek demonstrated that the system complied with our requirements, most notably in terms of maintainability, availability and power quality. A few measurement plots perceived by authors as particularly interesting are discussed in this contribution.

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Babu, Samuel Rajesh. "Push-Pull Converter Fed Three-Phase Inverter for Residential and Motor Load". International Journal of Power Electronics and Drive Systems (IJPEDS) 6, n.º 2 (1 de junho de 2015): 260. http://dx.doi.org/10.11591/ijpeds.v6.i2.pp260-267.

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The proposed paper is an new approach for power conditioning of a PV (photo-voltaic) cell array. The main objective is to investigate an approach to provide and improve the delivered electric energy by means of power conditioning structures with the use of alternative renewable resources (ARRs) for remote rural residential or industrial non-linear loads. This approach employs a series-combined connected boost and buck boost DC-DC converter for power conditioning of the dc voltage provided by a photo-voltaic array. The input voltage to the combined converters is 100 V provided from two series connected PV cells, which is converted and increased to 200 V at the dc output voltage. Series-combined connected boost and buck-boost DC-DC converters operate alternatively. This helps to reduce the input ripple current and provide the required 400 Vdc on a sinusoidal PWM three-phase inverter. Analysis of the two series-combined DC-DC converters is presented along with simulation results. Simulations of the series-combined DC-DC converters are presented with an output DC voltage of 200 V and a maximum output load of Po = 600 W.

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Kroics, K., U. Sirmelis e L. Grigans. "Digitally Controlled 4-Phase Bi-Directional Interleaved Dc-Dc Converter with Coupled Inductors / Digitāli Vadāms 4 Fāžu Divvirziena Līdzstrāvas Pārveidotājs Ar Saistītajām Droselēm". Latvian Journal of Physics and Technical Sciences 52, n.º 4 (1 de agosto de 2015): 18–31. http://dx.doi.org/10.1515/lpts-2015-0020.

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Abstract The main advantages of multiphase interleaved DC-DC converters over single-phase converters are reduced current stress and reduced output current ripple. Nevertheless, inductor current ripple cannot be reduced only by an interleaving method. The integrated magnetic structure can be used to solve this problem. In this paper, the application of 2-phase coupled inductor designed in a convenient way by using commercially manufactured coil formers and ferrite cores is analysed to develop a 4-phase interleaved DC-DC converter. The steady state phase and output current ripple in a boost mode of the interleaved bidirectional DC-DC converter with integrated magnetics are analysed. The prototype of the converter has been built. The experimental results of the current ripple are presented in the paper.

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Choong, Florence Chiao Mei, e Yin May Yeo. "An Improved DC-DC Boost Converter for Energy Harvesting". Journal of Engineering Technology and Applied Physics 5, n.º 2 (15 de setembro de 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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Ivanov, M. D., e R. T. Khazieva. "DC/DC converter in the electric vehicle traction system". Vestnik MGTU 26, n.º 4 (22 de dezembro de 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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Al-Ammari, Rashid, Atif Iqbal, Amith Khandakar, Syed Rahman e Sanjeevikumar Padmanaban. "Systematic Implementation of Multi-Phase Power Supply (Three to Six) Conversion System". Electronics 8, n.º 1 (18 de janeiro de 2019): 109. http://dx.doi.org/10.3390/electronics8010109.

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Multiphase (more than three) power system has gained popularity due to their inherent advantages when compared to three-phase counterpart. Multiphase power supply is extensively used in AC/DC multi-pulse converters, especially supply with multiple of three-phases. AC/DC converter with multi-pulse input is a popular solution to reduce the ripple in the DC output. Single-phase and three-phase transformers and phase transformation from single to multiphase are employed in variable speed drives application to feed the multi-cell H-Bridge converters and multi-pulse AC-DC converters. Six-phase system is extensively discussed in the literature for numerous applications ranging from variable speed drives to multiphase wind energy generation system. This paper shows the systematic phase transformation technique from three-phase to six-phase (both symmetrical and asymmetrical) for both understanding and teaching purposes. Such an approach could help students understand a promising advanced concept in their undergraduate courses. When phase difference between the two consecutive phases of six phases has a phase difference of 60, it is called a symmetrical six-phase system; while an asymmetrical or quasi, six-phase has two set of three-phase with a phase shift of 30 between the two sets. Simulation and experimental results are also presented.

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Wei, Shusheng, e Wusong Wen. "High-Frequency Oscillation of the Active-Bridge-Transformer-Based DC/DC Converter". Energies 15, n.º 9 (2 de maio de 2022): 3311. http://dx.doi.org/10.3390/en15093311.

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The dual-active-bridge converter (DAB) has attracted tremendous attention in recent years. However, its EMI issues, especially the high-frequency oscillation (HFO) induced by the dv/dt and parasitic elements of the transformer, are significant challenges. The multi-active-bridge converter (MAB) based on the multi-winding transformer also faces similar problems, which are even more complicated. This article investigates the HFO of active-bridge-transformer-based DC/DC converters including DAB and MAB. Firstly, the general HFO model is studied using the analysis of the AC equivalent circuit considering the asymmetrical parameters. Ignoring the AC resistance in the circuit, the high-order model of the voltage oscillation could be reduced to a second-order system. Based on the simplified model, the oscillation voltage generated by an active bridge is analyzed in the time domain. Then, a universal active voltage-oscillation-suppression method-selected harmonic-elimination phase-shift (SHE PS) modulation method is proposed. The impacts of the system parameters on the method are also revealed. The experimental results show the excellent performance of the proposed active suppression method, with voltage spike amplitude (VSA) reductions of 92.1% and 77.8% for the DAB and MAB prototypes, respectively.

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Tong, Minghao, Xiaoqiang Liu, Yudong Chen, Le Sun e Zhiyuan Xu. "A Multi-Functional Integrated Onboard Charger for Dual-Motor Driving EVs". Energies 17, n.º 21 (23 de outubro de 2024): 5276. http://dx.doi.org/10.3390/en17215276.

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In this paper, to achieve versatile, cost-effective charging for dual-motor EVs, a multi-functional integrated onboard charger is constructed using a dual-motor driving system. In the driving mode, a five-phase flux-switching permanent-magnet (FSPM) motor powers the front, while a three-phase FSPM motor drives the rear. While in the charging mode, different topologies are adopted for different application scenarios, such as the single-phase AC charging mode, the three-phase AC charging mode, and the DC charging mode. The five-phase FSPM motor and its inverters serve as a boost-based AC/DC converter in both single-phase and three-phase AC charging modes, transforming grid power to DC. In the DC charging mode, they are reconfigured to function as a buck converter. During the three-phase AC charging mode, the three-phase FSPM motor and its inverters take on the role of a rear-stage buck converter. They function to regulate the rectified DC voltage, ensuring it meets battery charging needs. The performance of the integrated charger is validated through simulation and experiment results.

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Lavanya, A., K. Vijaya Kumar e J. Divya Navamani. "Topological Comparison of Dual-Input DC-DC Converters". International Journal of Power Electronics and Drive Systems (IJPEDS) 8, n.º 2 (1 de junho de 2017): 804. http://dx.doi.org/10.11591/ijpeds.v8.i2.pp804-811.

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Dual input dc-dc converters have two input voltage sources or one input source and an energy storage system like ultra capacitor, PV, battery, super capacitors and a single output load. In order to process the power in hybrid energy systems using reduced part count, researchers have proposed several multi-input dc-dc power converter topologies to transfer power from different input voltage sources to the output. This paper compares non-isolated dual-input converter topologies topologically ,based on the components count, various fields of application and different modes of operation for hybrid systems mainly used in electric vehicles and renewable energy systems composed of energy storage systems (ESSs) with different voltage-current characteristics. Dual input dc-dc converter topologies considered in this paper are investigated using MATLAB and PSIM software and output voltage and inductor current waveforms are shown.

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Zhou, Xuanyi, Wei Juin Choy, Abraham M. Alcaide, Shuo Wang, Sandro Guenter, Jose I. Leon, Vito Giuseppe Monopoli et al. "Common DC-Link Capacitor Harmonic Current Minimization for Cascaded Converters by Optimized Phase-Shift Modulation". Energies 16, n.º 5 (21 de fevereiro de 2023): 2098. http://dx.doi.org/10.3390/en16052098.

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This paper investigates the influence of a constant carrier phase shift on the DC-link capacitor harmonic current of cascaded converters used in fuel-cell and mild-hybrid electric vehicles. In these applications, a DC-DC converter can be adopted between the battery and the motor drive inverter in a cascaded structure, where the two converters share the same DC-link. Since the DC-link capacitor of such a system represents a critical component, the optimization of the converter operation to limit the current stress and extend the lifetime of the capacitor is an primary objective. This paper proposes the use of a carrier phase shift between the modulations of the two converters in order to minimize the harmonic current of the DC-link capacitor. By harmonic analysis, an optimal carrier phase shift can be derived depending on the converter configuration. Analytical results are presented and validated by hardware-in-the-loop experiments. The findings show that the pulse width modulation carrier phase shift between the interleaved boost converter and the voltage source motor drive inverter has a significant influence on the DC-link capacitor current and thus on its lifetime. A case study with two-cell and three-cell interleaved boost converters shows a possible DC-link capacitor lifetime extension of up to 390%.

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Shin, Se-Un. "An Analysis of Non-Isolated DC-DC Converter Topologies with Energy Transfer Media". Energies 12, n.º 8 (18 de abril de 2019): 1468. http://dx.doi.org/10.3390/en12081468.

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As miniaturized mobile devices with various functionalities are highly desired, the current requirement for loading blocks is gradually increasing. Accordingly, the efficiency of the power converter that supports the current to the loading bocks is a critical specification to prolong the battery time. Unfortunately, when using a small inductor for the miniaturization of mobile devices, the efficiency of the power converter is limited due to a large parasitic DC resistance (RDCR) of the inductor. To achieve high power efficiency, this paper proposes an energy transfer media (ETM) that can make a switched inductor capacitor (SIC) converter easier to design, maintaining the advantages of both a conventional switched capacitor (SC) converter and a switched inductive (SI) converter. This paper shows various examples of SIC converters as buck, boost, and buck-boost topologies by simply cascading the ETM with conventional non-isolated converter topologies without requiring a sophisticated controller. The topologies with the ETM offer a major advantage compared to the conventional topologies by reducing the inductor current, resulting in low conduction loss dissipated at RDCR. Additionally, the proposed topologies have a secondary benefit of a small output voltage ripple owing to the continuous current delivered to the load. Extensions to a multi-phase converter and single-inductor multiple-output converter are also discussed. Furthermore, a detailed theoretical analysis of the total conduction loss and the inductor current reduction is presented. Finally, the proposed topologies were simulated in PSIM, and the simulation results are discussed and compared with conventional non-isolated converter topologies.

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Zotov, L. G., e I. M. Bolshakov. "Energy efficient capacitor DC-DC converter for autonomous power supply system". Vestnik IGEU, n.º 4 (31 de agosto de 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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Pesce, Cristián, Javier Riedemann, Rubén Peña, Michele Degano, Javier Pereda, Rodrigo Villalobos, Camilo Maury, Hector Young e Iván Andrade. "A Modified Multi-Winding DC–DC Flyback Converter for Photovoltaic Applications". Applied Sciences 11, n.º 24 (16 de dezembro de 2021): 11999. http://dx.doi.org/10.3390/app112411999.

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DC–DC power converters have generated much interest, as they can be used in a wide range of applications. In micro-inverter applications, flyback topologies are a relevant research topic due to their efficiency and simplicity. On the other hand, solar photovoltaic (PV) systems are one of the fastest growing and most promising renewable energy sources in the world. A power electronic converter (either DC/DC or DC/AC) is needed to interface the PV array with the load/grid. In this paper, a modified interleaved-type step-up DC–DC flyback converter is presented for a PV application. The topology is based on a multi-winding flyback converter with N parallel connected inputs and a single output. Each input is supplied by an independent PV module, and a maximum power point tracking algorithm is implemented in each module to maximize solar energy harvesting. A single flyback transformer is used, and it manages only 1/N of the converter rated power, reducing the size of the magnetic core compared to other similar topologies. The design of the magnetic core is also presented in this work. Moreover, the proposed converter includes active snubber networks to increase the efficiency, consisting of a capacitor connected in series with a power switch, to protect the main switches from damaging dv/dt when returning part of the commutation energy back to the source. In this work, the operating principle of the topology is fully described on a mathematical basis, and an efficiency analysis is also included. The converter is simulated and experimentally validated with a 1 kW prototype considering three PV panels. The experimental results are in agreement with the simulations, verifying the feasibility of the proposal.

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Behjati, Hamid, e Ali Davoudi. "Single‐stage multi‐port DC–DC converter topology". IET Power Electronics 6, n.º 2 (fevereiro de 2013): 392–403. http://dx.doi.org/10.1049/iet-pel.2012.0339.

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Hasan, Khairul Nisak Md, Aida Syafiqah Ahmad e Zainul Azhar Zakaria. "Interleaved 4-Phases DC/DC Converter for Electric Scooter to Improve Efficiency". MATEC Web of Conferences 225 (2018): 03013. http://dx.doi.org/10.1051/matecconf/201822503013.

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This paper presents the design of an Interleaved DC/DC Boost Converter for the implementation of an Electric Scooter. The output of the power converter can be controlled using the Pulse Width Modulation (PWM) switching technique to boost 12V battery supply to power a 24V Brushed DC Motor with improved efficiency compared to conventional converters. The design of the power converter was calculated for different number of interleaving phases. The simulation is carried out using MATLAB/Simulink for 2, 3, 4, 6 and 8-phases interleaved converters to compare their performances. The 4-phase is selected due to its advantage and further implemented in the prototype. PWM output switching frequency is set to 25 kHz with 4 signals of 90° phase shift to each other. The testing on a complete prototype was carried out.

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