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Journal articles on the topic 'High frequency DC/DC converter'

Author: Grafiati

Published: 4 June 2021

Last updated: 3 February 2022

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1

Golembiovsky, Y. M., D. Y. Lukov, and M. G. Koval. "Bidirectional three-port high-frequency DC/DC-converter." Proceedings of Tomsk State University of Control Systems and Radioelectronics 21, no. 1 (2018): 100–105. http://dx.doi.org/10.21293/1818-0442-2018-21-1-100-105.

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2

Karada, Koosuke, and Katsuaki Murata. "Ferroresonant DC-DC converter with high-frequency drive." Electronics and Communications in Japan (Part II: Electronics) 70, no. 1 (1987): 106–14. http://dx.doi.org/10.1002/ecjb.4420700112.

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3

Frivaldsky, Michal, and Jan Morgos. "DC-DC Converter Design Issues for High-Efficient DC Microgrid." Communications - Scientific letters of the University of Zilina 21, no. 1 (February 20, 2019): 35–41. http://dx.doi.org/10.26552/com.c.2019.1.35-41.

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In this article, the electrical properties, as well as the economic aspects of the modular and non-modular solution of the DC-DC photovoltaic converter for DC microgrid subsystem, are described. Principally a theoretical overview of the circuit configuration for the selected DC-DC stage of the DC microgrid system is shown. It is dealt with the comparison of the one non-modular high - voltage SiC-based dual - interleaved converter operating at the low switching frequency and with modular low voltage GaN-based DC-DC converters operating at high switching frequencies. The main focus is given to the research of the dependency that arises from the different module count, overall efficiency, costs, and power density (system volume). High efficiency, reduced overall volume, and maximum power density are important factors within modern and progressive solar systems. It is assumed that with the increase of switching frequency within the modular system the volume reduction of the passive components will be highly demanded, thus PCB dimensions and overall volume can be reduced. This dependency is investigated, while the total volume of the non-modular system is a unit of the measure. For these purposes, the design of variant solution was done, and consequently mutually compared in the way of simulations and experimental measurements.

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4

Kroics, Kaspars. "Digital Control of Variable Frequency Interleaved DC-DC Converter." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 8, 2015): 124. http://dx.doi.org/10.17770/etr2013vol2.854.

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This paper represents a design and implementation of a digital control of variable frequency interleaved DC-DC converter using a digital signal processor (DSP). The digital PWM generation, current and voltage sensing, user interface and the new period and pulse width value calculation with DSP STM32F407VGT6 are considered. Typically, the multiphase interleaved DC - DC converters require a current control loop in each phase to avoid imbalanced current between phases. This increases system costs and control complexity. In this paper the converter which operates in discontinuous conduction mode is designed in order to reduce costs and remove the current control loop in each phase. High current ripples associated with this mode operation are then alleviated by interleaving. Pulse width modulation (PWM) is one of the most conventional modulation techniques for switching DC - DC converters. It compares the error signal with the sawtooth wave to generate the control pulse. This paper shows how six PWM signals phase-shifted by 60 degrees can be generated from calculated values. To ensure that the measured values do not contain disturbances and in order to improve the system stability the digital signal is filtered. The analog to digital converter's (ADC) sampling time must not coincide with the power transistor's switching time, therefore the sampling time must be calculated correctly as well. Digital control of the DC-DC converter makes it easy and quickly to configure. It is possible for this device to communicate with other devices in a simple way, to realize data input by using buttons and keyboard, and to display information on LED, LCD displays, etc.

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5

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

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

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6

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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7

Murata, Katsuaki, Koosuke Harada, and Kenji Ozawa. "Simplified Resonant DC-DC Converter with High Frequency Drive." IEEJ Transactions on Industry Applications 121, no. 1 (2001): 74–77. http://dx.doi.org/10.1541/ieejias.121.74.

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8

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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9

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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10

Deshmukh, Sangita H., Afsana Sheikh, Ms Medha Giri, and Dr D. R. Tutakne. "High Input Power Factor High Frequency Push-Pull DC/DC Converter." IOSR Journal of Electrical and Electronics Engineering 11, no. 04 (April 2016): 42–47. http://dx.doi.org/10.9790/1676-1104044247.

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11

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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12

Hayashi, Yusuke, Yoshikatsu Matsugaki, and Tamotsu Ninomiya. "Design Consideration for High Step-Up Nonisolated Multicellular dc-dc Converter for PV Micro Converters." Journal of Engineering 2018 (2018): 1–16. http://dx.doi.org/10.1155/2018/5098083.

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High step-up nonisolated multicellular dc-dc converter has been newly proposed for PV microconverters. The multicellular converter consists of the nonisolated step-up cell converters using bidirectional semiconductor switches, and these cell converters are connected in Input Parallel Output Series (IPOS). The voltage transformation ratio of the step-up converter is N/(1-D) in case all the transistors in N cell converters are operated at the duty ratio of D. The proposed multicellular dc-dc converter also accomplishes high efficiency because of no magnetic coupling such as the high frequency transformer and the coupled inductor. Laboratory prototype has been fabricated to show the feasibility of the proposed converter. Design consideration for the 20 V–40 V to 384 V, 240 W nonisolated multicellular dc-dc converter has been also conducted, and the potential to achieve the efficiency of 98% has been shown. The proposed multicellular converter contributes to realizing the environmentally aware data centers for future low carbon society.

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13

Sadikin, Muhammad, Tomonobu Senjyu, and Atsushi Yona. "DC–DC Type High-Frequency Link DC for Improved Power Quality of Cascaded Multilevel Inverter." International Journal of Emerging Electric Power Systems 14, no. 4 (June 28, 2013): 333–40. http://dx.doi.org/10.1515/ijeeps-2012-0007.

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Abstract Multilevel inverters are emerging as a new breed of power converter options for power system applications. Recent advances in power switching devices enabled the suitability of multilevel inverters for high voltage and high power applications because they are connecting several devices in series without the need of component matching. Usually, a transformerless battery energy storage system, based on a cascaded multilevel inverter, is used as a measure for voltage and frequency deviations. System can be reduced in size, weight, and cost of energy storage system. High-frequency link circuit topology is advantageous in realizing compact and light-weight power converters for uninterruptible power supply systems, new energy systems using photovoltaic-cells, fuel-cells and so on. This paper presents a DC–DC type high-frequency link DC (HFLDC) cascaded multilevel inverter. Each converter cell is implemented a control strategy for two H-bridge inverters that are controlled with the same multicarrier pulse width modulation (PWM) technique. The proposed cascaded multilevel inverter generates lower voltage total harmonic distortion (THD) in comparison with conventional cascaded multilevel inverter. Digital simulations are carried out using PSCAD/EMTDC to validate the performance of the proposed cascaded multilevel inverter.

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14

Maurya, Rakesh, S. P. Srivastava, and Pramod Agarwal. "Multiphase High-Frequency Isolated DC–DC Converter for Industrial Applications." International Journal of Emerging Electric Power Systems 15, no. 1 (January 14, 2014): 35–43. http://dx.doi.org/10.1515/ijeeps-2013-0146.

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Abstract Industrial applications such as welding, plasma cutting, and surface hardening require a large DC current at low voltage. In such applications, the rating of power supply varies from few kilowatts to hundreds of kilowatts. The power supply employs in such applications particularly in arc welding process is expected to operate from open-circuit (no-load) to short-circuit (when the electrode sticks to the workpiece for a short span of time) quickly. In this paper, high-frequency isolated multiphase DC–DC converter is proposed which is well suited for aforementioned applications. Based on mathematical analysis, a simulation study with 5 kW, 5 V/1,000 A proposed model is carried out using Simulink block set and Sim Power System tool box and its performances are evaluated under symmetrical control methods. To verify the simulation results, scaled prototype model of rating 1.5 V/100 A is developed and tested with aforementioned control method under different operating conditions. In comparison with conventional welding power supply employed in many industries, the performance of proposed converter is improved significantly in terms of size and weight, efficiency and dynamic response.

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15

Chung, Euihoon, Kyung-Hwan Lee, Yongsu Han, and Jung-Ik Ha. "Single-Switch High-Frequency DC–DC Converter Using Parasitic Components." IEEE Transactions on Power Electronics 32, no. 5 (May 2017): 3651–61. http://dx.doi.org/10.1109/tpel.2016.2582831.

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16

Kishore, G. Indira, and Ramesh Kumar Tripathi. "High Gain Single Switch DC-DC Converter Based on Switched Capacitor Cells." Journal of Circuits, Systems and Computers 29, no. 12 (February 26, 2020): 2050188. http://dx.doi.org/10.1142/s0218126620501881.

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With photovoltaic or fuel cell as a source, the high voltage required at DC bus as input for inverter can be obtained by high gain DC-DC converters. This can be achieved by implementing switched capacitor (SC) cells. Switched capacitors have the ability to produce high static gain and at the same time, they limit the voltage stress across the components. This paper proposes a high static gain, single switch DC converter based on the SC cells to develop high gain. These cells not only boost the voltage gain but also reduce the voltage stress at the active components. This converter also features a single active switch, low input ripple current through the inductor, absence of snubber circuit as the proposed converter does not assist the voltage spike across the active switch. The proposed converter allows high switching frequency and therefore results in a smaller size. The voltage gain can be increased further by adding the switched cells. In this paper, the operation in CCM, DCM, and design of components for the proposed converter is discussed. The MATLAB/SIMLINK and hardware-based studies for the proposed converters have been discussed to validate the specified features.

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17

Babu, A. R. Vijay, P. M. Venkatesh, and Dr K. Suresh. "High Frequency Link Power Conversion System for Fuel cell Applications." International Journal of Engineering & Technology 7, no. 4.24 (November 27, 2018): 1. http://dx.doi.org/10.14419/ijet.v7i4.24.21760.

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In this paper an empirical model of the air breathing (ABFC) is proposed to investigate the cell voltage verses current density characteristics and harnessing of maximum energy from natural resource whenever it’s available. The power electronic converters role is important in between source and load. Proper controller can switch the converter in the desired time and improve the system performance and stability. The mathematical model of the ABFC is built in MATLAB/Simulink. The proposed system also has boost converter, bidirectional DC-DC converter and inverter for grid and energy integration. The boost inverter/buck rectifier in this system is controlled by ANFIS controller is for better output, boost and bidirectional DC-DC converters are controlled by PID controller in closed loop. Overall operations are based on modes main controller, which control the system operation in different modes. Any variations happening in the input, storage and load parameters, the controller changes the mode and operates the system in effective way.

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18

Hwang, Lark-Hoon, Seung-Kwon Na, and Gi-Ho Choi. "A study on High Frequency DC-DC Converter Drive using a Piezoelectric Transformer." Journal of the Korea Academia-Industrial cooperation Society 11, no. 2 (February 28, 2010): 476–84. http://dx.doi.org/10.5762/kais.2010.11.2.476.

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19

Premalatha, R., and P. Murugesan. "Comparison of Filter with Fuzzy Controlled Three Level DC-DC Converter Fed Drive." International Journal of Engineering Research in Africa 14 (March 2015): 63–74. http://dx.doi.org/10.4028/www.scientific.net/jera.14.63.

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A simple Fuzzy logic controller (FLC) applied to buck converter is presented in this paper. This approach uses FLC which performs better when compared with the conventional PI controllers. In proposed buck converters, high voltage dc supply is switched at very high frequency and inductively transferred to dc load via a high frequency transformer and rectifier. In this converter four power switches are connected in series to primary of high frequency transformer for large load currents. To achieve large step-down voltage ratios the power switches are turned ON and OFF alternatively with a time gap. The voltage step-down ratios, Total Harmonic Distortion and angular velocity of drive are the parameters to be analyzed. The comparison with the original FLC and comparison of three level DC-DC converter with capacitor and pi filter is carried out by MATLAB-Simulink simulation and Model is designed to verify the proposed method performance.

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20

Tan, Zhong Yih, Nadia Mei Lin Tan, and 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, no. 2 (June 1, 2018): 495. http://dx.doi.org/10.11591/ijpeds.v9.i2.pp495-503.

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<span lang="EN-US">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.</span>

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21

Idham alzaidi, Ali, Azli Yahya, Tan Tian Swee, and Norhalimah Idris. "Development of high frequency generator for bipolar electrosurgical unit." International Journal of Engineering & Technology 7, no. 2.29 (May 22, 2018): 20. http://dx.doi.org/10.14419/ijet.v7i2.29.13118.

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Power Electronics is widely used in bioscience and medical instruments such as Electrosurgical Units, MRI and X-ray. An advance development in switch mode power supply leads to a new design topology of DC to DC convertor for Electrosurgical Systems. The new designed system has a capacity to produce high efficient output power with high resonance, this improves the performance of the surgery operation. This paper reports a Buck-Boost topology DC to DC (Flyback) converter with high power switching. The simulation results show an improved performance when compared to the existing system.

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22

Kannan, G. "A High Frequency Converter for EV Application." Indonesian Journal of Electrical Engineering and Computer Science 9, no. 1 (January 1, 2018): 5. http://dx.doi.org/10.11591/ijeecs.v9.i1.pp5-11.

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<p>An electrical vehicle (EV) is advancing as alternative power trains for green transportation. the DC–DC converter for auxiliary power supply of electric loads .In this paper presented a new topologyof high frequency converter for electric vehicle was proposed,This converter has to be capable of handling the energy transfer from the 28V DC bus and the 550 high voltage DC bus (used for the electric traction). The control strategy is phase shift of the full bridge converter. Using this topology we reduce the switching losses. Conventional converter at two levels of voltage by only one full bridge converter using two planar transformers in high frequency the primary are coupled in parallel and the secondary are in series. We minimized the size and the weight of the converter. The high frequency converter advantages in terms of cost, efficiency, flexibility, and increased due to the possibility of easy synchronous rectification implementation.<strong><em></em></strong></p>

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23

Rabinovici, R. "Three phase high frequency DC-DC convertor." Electronics Letters 26, no. 13 (1990): 829. http://dx.doi.org/10.1049/el:19900543.

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24

Forsyth, A. J. "High-frequency load-resonant DC-DC converters." Power Engineering Journal 13, no. 4 (August 1, 1999): 213–20. http://dx.doi.org/10.1049/pe:19990408.

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25

Nishimura, Toshihiro, Mutsuo Nakaoka, and Tohru Maruhashi. "A high frequency inverter linked DC-DC converter using asymmetrical SCR." IEEJ Transactions on Industry Applications 107, no. 11 (1987): 1355–62. http://dx.doi.org/10.1541/ieejias.107.1355.

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26

Hatanaka, Yoshihiro. "Investigation of Soft Switching for High-Frequency Link DC-DC Converter." IEEJ Transactions on Industry Applications 112, no. 9 (1992): 815–22. http://dx.doi.org/10.1541/ieejias.112.815.

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27

Tsuneoka, Masaki, Nobuyoshi Nakayama, Toshio Asaka, and Toshimitsu Iiyama. "Development of high frequency step-up transformer for DC-DC converter." IEEJ Transactions on Industry Applications 119, no. 11 (1999): 1424–25. http://dx.doi.org/10.1541/ieejias.119.1424.

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28

Kato, N., S. Hirano, H. Matsuura, and M. Torii. "Ferrite substrates for high-frequency switching DC-to-DC converter applications." IEEE Transactions on Magnetics 21, no. 5 (September 1985): 1723–25. http://dx.doi.org/10.1109/tmag.1985.1064057.

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29

Nishimura, Toshihiro, Matsuo Nakamura, and Tohru Maruhashi. "A high frequency inverter linked DC-DC converter using asymmetrical SCR." Electrical Engineering in Japan 107, no. 6 (1987): 124–32. http://dx.doi.org/10.1002/eej.4391070616.

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30

Miyoshi, Toru, Akira Kawata, and Shigeo Masukawa. "A Design Method of High Frequency Transformer for DC-DC Converter." Journal of the Japan Institute of Power Electronics 44 (2018): 90–96. http://dx.doi.org/10.5416/jipe.44.90.

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31

Fujita, Tatsuki, and Shigeo Masukawa. "Investigations on liquid immersion cooling in high frequency DC-DC Converter." Journal of the Japan Institute of Power Electronics 45 (2019): 200. http://dx.doi.org/10.5416/jipe.45.200.

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32

Wang, A. H. "The Anti-High Voltage Design of a Double Switching Forward DC/DC Converter." Applied Mechanics and Materials 33 (October 2010): 139–42. http://dx.doi.org/10.4028/www.scientific.net/amm.33.139.

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High-frequency DC/DC converter used in underground coal mine waste large energy, and it doesn't anti-high voltage, so, it is unstable. In order to solve these problems, proposed one kind of new design of Double Switching Forward DC/DC converter. The test result and the practical application indicated. The new converter has many merits, including anti-high voltage, high frequency, high stability, loss Low. So, the new converter has certain economic value and the practical value.

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33

Alhamrouni, Ibrahim, M. R. Bin Hamzah, Mohamed Salem, Awang Jusoh, Azhar Bin Khairuddin, and Tole Sutikno. "A bidirectional resonant converter based on wide input range and high efficiency for photovoltaic application." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 3 (September 1, 2019): 1469. http://dx.doi.org/10.11591/ijpeds.v10.i3.pp1469-1475.

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<span lang="EN-US">This work highlights a modular power conditioning system (PCS) in photovoltaic (PV) applications which consists with a DC-DC converter. The converter is able to regulate and amplify the input DC voltage produced by the PV panal. The implementation of Mosfet as bidirectional switch on the converter yields greater conversion ratio and better voltage regulation than a conventional DC-DC step up converter and PWM resonant converter. It also reduces the switching losses on the output DC voltage of the converter, as the MOSFET switches on primary winding of converter switch on under ZVS conditions. The proposed resonant converter has been designed, with the modification of series resonant converter and PWM boost converter that utilizes the high frequency of AC bidirectional switch to eliminate the weaknesses of used converters. The topology of the proposed converter includes the mode of operations, designing procedure and components selection of the new converter elements. This topology provides a DC output voltage to the inverter at range of about 120Vac-208 Vac. </span>

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34

Park, Sangeun, and Hanju Cha. "Analysis of A Fixed Frequency LCL-type DC-DC Converter Including the Effect of High-Frequency Transformer." Transactions of The Korean Institute of Electrical Engineers 65, no. 1 (January 1, 2016): 81–87. http://dx.doi.org/10.5370/kiee.2016.65.1.81.

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35

Mostaghimi, Omid, Nicolas G. Wright, and Alton B. Horsfall. "Switching Losses in a SiC-Based DC-DC Multilevel Boost Converter." Materials Science Forum 717-720 (May 2012): 1241–44. http://dx.doi.org/10.4028/www.scientific.net/msf.717-720.1241.

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In the aerospace industry where the weight and power density are important design parameters, high frequency operation results in smaller passive components. Furthermore, to achieve a large voltage conversion ratio, which is a goal for payload systems, the use of transformers increases the size and power losses of the system. To fulfill the space and weight requirements, a transformer-less SiC-based DC-DC multilevel converter providing high voltage conversion ratios without an extremely high duty cycle has been realized. The experimental high switching frequency and low current results for a conventional, 3-level and 4-level converter utilizing Si and SiC based COTS diodes are presented. SiC-based multilevel converters show a higher efficiency due to the low reverse recovery and fast switching of the diodes, which results in a higher voltage conversion ratio. This translates to a lower duty cycle to obtain the required output voltage, whilst eliminating the need for complex filtering even under light load conditions.

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36

Cheng, Xin, Wanjing Shao, Yongqiang Zhang, Jianmin Zeng, and Zhang Zhang. "High frequency and high efficiency DC-DC converter with sensorless adaptive-sizing technique." IEICE Electronics Express 17, no. 3 (2020): 20190719. http://dx.doi.org/10.1587/elex.16.20190719.

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37

Karakaya, Furkan, Özgür Gülsuna, and Ozan Keysan. "Feasibility of Quasi-Square-Wave Zero-Voltage-Switching Bi-Directional DC/DC Converters with GaN HEMTs." Energies 14, no. 10 (May 16, 2021): 2867. http://dx.doi.org/10.3390/en14102867.

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There are trade-offs for each power converter design which are mainly dictated by the switching component and passive component ratings. Recent power electronic devices such as Gallium Nitride (GaN) transistors can improve the application range of power converter topologies with lower conduction and switching losses. These new capabilities brought by the GaN High Electron Mobility Transistors (HEMTs) inevitably changes the feasible operation ranges of power converters. This paper investigates the feasibility of Buck and Boost based bi-directional DC/DC converter which utilizes Quasi-Square-Wave (QSW) Zero Voltage Switching (ZVS) on GaN HEMTs. The proposed converter applies a high-switching frequency at high output power to maximize the power density at the cost of high current ripple with high frequency of operation which requires a design strategy for the passive components. An inductor design methodology is performed to operate at 28 APP with a switching frequency of 450 kHz. In order to minimize the high ripple current stress on the output capacitors an interleaving is performed. Finally, the proposed bi-directional converter is operated at 5.4 kW with 5.24 kW/L or 85.9 W/in3 volumetric power density with air-forced cooling. The converter performance is verified for buck and boost modes and full load efficiencies are recorded as 97.7% and 98.7%, respectively.

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Waradzyn, Zbigniew, Robert Stala, Andrzej Mondzik, Aleksander Skała, and Adam Penczek. "GaN-Based DC-DC Resonant Boost Converter with Very High Efficiency and Voltage Gain Control." Energies 13, no. 23 (December 3, 2020): 6403. http://dx.doi.org/10.3390/en13236403.

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This paper presents a concept for the operation of a resonant DC–DC switched-capacitor converter with very high efficiency and output voltage regulation. In its basic concept, such a converter operates as a switched-capacitor voltage doubler (SCVD) in the Zero Current Switching (ZCS) mode with a constant output voltage. The proposed methods of switching allow for the switched-capacitor (SC) converter output voltage regulation, and improve its efficiency by the operation with Zero Voltage Switching (ZVS). In this paper, various switching patterns are proposed to achieve high efficiency and the output voltage control by frequency or duty cycle regulation. Some examples of the application of the proposed switching patterns are presented: in current control at the start-up of the converter, in a bi-directional converter, and in a modular cascaded system. The paper also presents an analytical model as well as the relationships between the switching frequency, voltage ratio and efficiency. Further, it demonstrates the experimental verification of the waveforms, voltage ratios, as well as efficiency. The proposed experimental setup achieved a maximum efficiency of 99.228%. The implementation of the proposed switching patterns with the ZVS operation along with the GaN-based (Gallium Nitride) design, with a planar choke, leads to a high-efficiency and low-volume solution for the SCVD converter and is competitive with the switch-mode step-up converters.

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Zhang, Hong, Gui Xin Wang, Hao Yan, and Lu Zhou Zhang. "Research on the Half-Bridge Three-Level DC/DC Converter with High Frequency and High Voltage." Advanced Materials Research 732-733 (August 2013): 1175–78. http://dx.doi.org/10.4028/www.scientific.net/amr.732-733.1175.

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In this research, a high-voltage direct current zero voltage switching (ZVS) PWM half-bridge converter is proposed. The parameters of the converter as follows: the input voltage is up to 4000V;the output voltage is 600V.The new ZVS PWM TL converter has neutral point clamping diodes and flying capacitor. This research is going to analyze the working principle of circuit witch thus realizing the zero voltage switching and the circuit parameters selection. Moreover, circuits simulation is carried out by MATLAB to verify the reliability and feasibility of this DC/DC converter topology.

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Mostaghimi, Omid, Rupert C. Stevens, Nicholas G. Wright, and Alton B. Horsfall. "Electromagnetic Interference in Silicon Carbide DC-DC Converters." Materials Science Forum 740-742 (January 2013): 1044–47. http://dx.doi.org/10.4028/www.scientific.net/msf.740-742.1044.

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A comparison of radiated noise for Silicon and Silicon Carbide converters is presented. SiC JBS diodes were used in this evaluation to enable fast switching times, whilst minimizing the transistor junction temperature. Radiated electromagnetic-interference measurements showed the highest noise signature for the SiC JFET and lowest for the SiC MOSFET. The negative gate voltage requirement of the SiC MOSFET introduces up to 6 dBµV increase in radiated noise, due to the induced current in the high frequency resonant stray loop in the negative power plane of the gate drive. The SiC JFET and MOSFET have shown overall converter efficiencies of 96% and 95.5% respectively. This efficiency shows only a weak frequency dependence, in contrast to the CoolMOS/SiC JBS diode combination which demonstrated an efficiency drop from 95% to 92.5% when increasing the frequency from 100kHz to 250kHz.

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Jayaswal, K., and D. K. Palwalia. "Performance Analysis of Non-Isolated DC-DC Buck Converter Using Resonant Approach." Engineering, Technology & Applied Science Research 8, no. 5 (October 13, 2018): 3350–54. http://dx.doi.org/10.48084/etasr.2242.

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DC-DC converters preserve or control the output DC voltage. Due to parasitic constituents such as leakage capacitance of both diode and inductor, and transformer leakage inductance, DC-DC converters mostly operate on rigid switching conditions which result in high switching losses. These parasitic constituents affect the dc-dc converter’s operational reliability, instigate electromagnetic interference issues and limit the converter’s operation at higher frequency operations. In this paper, resonant or soft-switch approach has been employed to improve the operating performance and design-oriented principle investigations have been carried out for overcoming the issues of parasitic constituents in 24-12V DC-DC step-down (buck) converter. This paper divulges the analysis and Matlab Simulation results for 24-12V buck converter based on resonant or soft-switching approach.

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42

Piao, Changhao, Chao Jiang, Hongtao Qiao, Chongdu Cho, and Sheng Lu. "Study on the Control Algorithm of Two-Stage DC-DC Converter for Electric Vehicles." Advances in Mechanical Engineering 6 (January 1, 2014): 203793. http://dx.doi.org/10.1155/2014/203793.

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The fast response, high efficiency, and good reliability are very important characteristics to electric vehicles (EVs) dc/dc converters. Two-stage dc-dc converter is a kind of dc-dc topologies that can offer those characteristics to EVs. Presently, nonlinear control is an active area of research in the field of the control algorithm of dc-dc converters. However, very few papers research on two-stage converter for EVs. In this paper, a fixed switching frequency sliding mode (FSFSM) controller and double-integral sliding mode (DISM) controller for two-stage dc-dc converter are proposed. And a conventional linear control (lag) is chosen as the comparison. The performances of the proposed FSFSM controller are compared with those obtained by the lag controller. In consequence, the satisfactory simulation and experiment results show that the FSFSM controller is capable of offering good large-signal operations with fast dynamical responses to the converter. At last, some other simulation results are presented to prove that the DISM controller is a promising method for the converter to eliminate the steady-state error.

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Hariya, Akinori, Ken Matsuura, Hiroshige Yanagi, Satoshi Tomioka, Yoichi Ishizuka, and Tamotsu Ninomiya. "Considerations of Physical Design and Implementation for 5 MHz-100 W LLC Resonant DC-DC Converters." Active and Passive Electronic Components 2016 (2016): 1–11. http://dx.doi.org/10.1155/2016/4027406.

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Recently, high power-density, high power-efficiency, and wide regulation range isolated DC-DC converters have been required. This paper presents considerations of physical design and implementation for wide regulation range MHz-level LLC resonant DC-DC converters. The circuit parameters are designed with 3–5 MHz-level switching frequency. Also, the physical parameters and the size of the planar transformer are optimized by using derived equations and finite element method (FEM) with Maxwell 3D. Some experiments are done with prototype LLC resonant DC-DC converter using gallium nitride high electron mobility transistors (GaN-HEMTs); the input voltage is 42–53 V, the reference output voltage is 12 V, the load current is 8 A, the maximum switching frequency is about 5 MHz, the total volume of the circuit is 4.1 cm3, and the power density of the prototype converter is 24.4 W/cc.

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S., Jaisudha, Sowmiya Srinivasan, and Kanimozhi Gunasekaran. "Bidirectional Resonant DC-DC converter for Microgrid Applications." International Journal of Power Electronics and Drive Systems (IJPEDS) 8, no. 4 (December 1, 2017): 1548. http://dx.doi.org/10.11591/ijpeds.v8.i4.pp1548-1561.

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<p>This paper proposes a non-isolated soft-switching bidirectional dc/dc converter for interfacing energy storage in DC microgrid. The proposed converter employs a half-bridge boost converter at input port followed by a LCC resonant tank to assist in soft-switching of switches and diodes, and finally a voltage doubler circuit at the output port to enhance the voltage gain by two times. The LCC resonant circuit also adds a suitable voltage gain to the converter. Therefore, overall high voltage gain of the converter is obtained without a transformer or large number of multiplier circuit. For operation in buck mode, the high side voltage is divided by half with capacitive divider to gain higher step-down ratio. The converter is operated at high frequency to obtain low output voltage ripple, reduced magnetics and filters. Zero voltage turn-on is achieved for all switches and zero current turn-on and turn-off is achieved for all diodes in both modes i.e., buck/boost operation. Voltage stress across switches and diode is clamped naturally without external snubber circuit. An experimental prototype has been designed, built and tested in the laboratory to verify the performance of the proposed converter.</p>

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Islam, Md Maidul, and Md Mamun Ur Rashid. "Development of a New High Frequency Two Quadrant DC-DC Sepic Converter." Asia Pacific Journal of Energy and Environment 4, no. 1 (2017): 31–40. http://dx.doi.org/10.18034/apjee.v4i1.513.

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Choong-Sik Kim, Seok Bae, Hee-Jun Kim, Seoung-Eui Nam, and Hyoung-June Kim. "Fabrication of high frequency DC-DC converter using Ti/FeTaN film inductor." IEEE Transactions on Magnetics 37, no. 4 (July 2001): 2894–96. http://dx.doi.org/10.1109/20.951339.

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Zong, Sheng, Xiangning He, Haoze Luo, Wuhua Li, and Yan Deng. "High-power bidirectional resonant DC–DC converter with equivalent switching frequency doubler." IET Renewable Power Generation 10, no. 6 (July 1, 2016): 834–42. http://dx.doi.org/10.1049/iet-rpg.2015.0437.

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Barai, M., S. Sengupta, and J. Biswas. "Dual-Mode Multiple-Band Digital Controller for High-Frequency DC–DC Converter." IEEE Transactions on Power Electronics 24, no. 3 (March 2009): 752–66. http://dx.doi.org/10.1109/tpel.2008.2008391.

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Forsyth, A. J., I. K. Ellis, and M. Möller. "Adaptive control of a high-frequency DC–DC converter by parameter scheduling." IEE Proceedings - Electric Power Applications 146, no. 4 (1999): 447. http://dx.doi.org/10.1049/ip-epa:19990344.

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Maurya, Rakesh, S. P. Srivastava, and Pramod Agarwal. "Symmetrical and asymmetrical controlled three-phase high frequency isolated DC–DC converter." International Journal of Electrical Power & Energy Systems 52 (November 2013): 132–42. http://dx.doi.org/10.1016/j.ijepes.2013.03.042.

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