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Academic literature on the topic 'Isolated power converts'

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Published: 10 March 2023

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Journal articles on the topic "Isolated power converts"

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Sachdev, Hira Singh, and Ashok Kumar Akella. "Small Hydro Power Schemes: Technical Aspects." International Journal of Advances in Applied Sciences 6, no. 1 (March 1, 2017): 55. http://dx.doi.org/10.11591/ijaas.v6.i1.pp55-63.

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<p>Small hydro systems play a major role in meeting power requirements of remote, isolated, hilly areas in a decentralized manner by tapping water streams, rivulets and canals of small discharge. Small hydroelectric system captures the energy in flowing water and converts it to electricity.</p>Of all the non-conventional renewable energy sources, small hydro stands first as it is more resourceful, reduces system losses, environment friendly, non-consumptive and source is renewable due to their enormous advantages over large hydro and other power plants, lot of small hydro-power plants have come up across the world to meet the ever increasing demand of electrical energy. Lowering the high initial cost of the small hydro-power plants and its popularization is today’s challenges. This paper describes basic techniques design of the small hydro-power development.
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Ma, Runzhuo. "Analysis and Design Based on the Operation Mode of Power Electronic Transformer in Smart Grid." Journal of Physics: Conference Series 2108, no. 1 (November 1, 2021): 012073. http://dx.doi.org/10.1088/1742-6596/2108/1/012073.

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Abstract Power electronic transformers(PET) are the key energy conversion equipment in the operation of modern smart grids, the main function of PET is to achieve the conversion of AC voltage to AC voltage, while taking into account the DC ports. This article mainly studies three-stage power electronic transformers based on three-phase uncontrolled rectifier, full-bridge isolated DC-DC converter and three-phase inverter. The operation mechanism and actual working process of the three parts of the PET are analyzed respectively, and the transformer is simulated and analyzed based on the Matlab/Simulink simulation platform. The rectifier converts the AC voltage on the grid side into a rippled DC voltage; the DC-DC converter transforms the obtained DC voltage, taking into account the access of the DC ports; the inverter converts the obtained DC voltage into AC voltage through unipolar modulation and connects to the grid. The experimental results show that the PET constructed in this way can operate safely and stably, which has good voltage conversion and electrical isolation functions, and can be connected to DC loads.
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Adnan, Muhammad, Rashid Mehmood, Muhammad Waseem Imtiaz, Sajjad Ahmed, Muhammad Shahmeel, Muhammad Okash ur Rehman, Saira Zahoor, and Muhammad Mujahid Iqbal. "Efficient Physical and Multidisciplinary Approaches in Combinations of Nanoparticles towards Power Generations, Energies Production Methods and Photocatalysis Mechanism." Scholars Bulletin 8, no. 3 (March 10, 2022): 84–88. http://dx.doi.org/10.36348/sb.2022.v08i03.002.

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To progress toward sustainable growth, future hydro-power development must pay a bit more attention towards how changing climate may impact hydropower output, as well as make massive action to limit the environmental costs borne by people who live near dams. Long term projections help in providing data for power network risk analysis as well as identifying wind power generation potential in particular places, delivering important data for electricity planners. Hydro-electric power system is an enhanced energy process because it effectively converts mechanical power into grid power, but both are high-energy methods. The utilization of wind turbines for renewable power source has turned out to be one of the greatest viable alternate wells-prings of electricity age because of the little recompense, for instance, being profitable and efficient and environment friendly. Many foundations, organizations, associations, and experts have demonstrated that wind turbines are presumed to comprehend the imperativeness order. In compared to conventional power plants, although wind-power plants have little impact on the environment, concern exists over the noise produced by the turbine blades and visual impacts to the landscape and turbine blade. While wind turbines are connected to the small scale or isolated network, the power product from another source should be varied in reply to these variant and change in sequence to retain system density and voltage with in pre-set limit.
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Nik Azmi, Nik Mahmood, Nazlee Faisal Ghazali, Ahmad Fikri, and Md Abbas Ali. "Studies on Power Generation and Wastewater Treatment Using Modified Single Chamber Microbial Fuel Cell." Advanced Materials Research 1113 (July 2015): 823–27. http://dx.doi.org/10.4028/www.scientific.net/amr.1113.823.

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A membrane-less and mediator-less system was designed and tested with wastewater sample as fuel to generate electricity. Microorganisms were first isolated from the wastewater sample to pure culture and were used as the ‘machinery’ that converts wastewater into energy. The wastewater samples were treated either by sterilization or non-sterilization methods. These tests were run using a modified air-cathode single chamber microbial fuel cell (MFC). By sterilizing the wastewater, the calculated power density was much lower compared to non-sterilized wastewater indicating a significant role of microbial activity in the SCMFC system and substrate availability. Furthermore, mixed culture was observed to give larger power density compared to an individual microbe (18.42 ± 5.84 mW/m2 for mixed culture and 8.82 ± 4.56 mW/m2 to 9.46 ± 4.87 mW/m2 for individual microbe, Bukholderi capecia and Acidovorax sp. respectively) to prove that larger power value could be achieved with a mixed microbial system. In addition, the system proved to remove 68.57% of chemical oxygen demand (COD) of the wastewater sample tested. In conclusion, the designed SCMFC has been proven capable of power generation and wastewater treatment comparable to other SCMFCs to date.
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Bustos, María, Humberto Ibarra, and Jenny Dussán. "The Golden Activity of Lysinibacillus sphaericus: New Insights on Gold Accumulation and Possible Nanoparticles Biosynthesis." Materials 11, no. 9 (September 2, 2018): 1587. http://dx.doi.org/10.3390/ma11091587.

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Power struggles surrounding the increasing economic development of gold mining give rise to severe environmental and social problems. Two new strains of Lysinibacillus sphaericus were isolated from an area of active alluvial gold mining exploitation at El Bagre, Antioquia. The absorption capacity of these strains and some of the L. sphaericus Microbiological Research Center (CIMIC) collection (CBAM5, OT4b.31, III(3)7) were evaluated by spectrophotometry according to a calibration gold curve of HAuCl4− with concentrations between 0 µg/mL and 100 µg/mL. Bioassays with living biomass were carried out with an initial gold concentration of 60 µg/mL. Their sorption capacity was evident, reaching percentages of gold removal between 25% and 85% in the first 2 h and 75% to 95% after 48 h. Biosynthesis of possible gold nanoparticles (AuNPs) in assays with living biomass was also observed. Metal sorption was evaluated using scanning electron microscopy and energy-dispersive X-ray spectroscopy (EDS) analysis. The sorption and fabrication capacity exhibited by the evaluated strains of L. sphaericus converts this microorganism into a potential alternative for biomining processes, especially those related to gold extraction.
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HANAMOTO, T., H. YAMADA, S. TOOSI, N. F. MAILAH, and M. NORHISAM. "DDPWM-Based Power Conversion System Using a Matrix Converter for an Isolated Power Supply." Journal of the Japan Society of Applied Electromagnetics and Mechanics 23, no. 3 (2015): 573–78. http://dx.doi.org/10.14243/jsaem.23.573.

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Malyarchuk, Boris A., Miroslava V. Derenko, and Galina A. Denisova. "R577X polymorphism of alpha-actinin-3 in human populations of North-Eastern Asia." Ecological genetics 15, no. 1 (March 15, 2017): 50. http://dx.doi.org/10.17816/ecogen15150-56.

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Background. In polymorphism rs1815739, a C → T transition converts arginine to a premature stop-codon at residue 577 of the alpha-actinin-3 (ACTN3) protein (R577X polymorphism). This polymorphism may affect muscle performance, and the derived 577X allele has been found to be under-represented in sprint/power athletes. In addition, loss of alpha-actinin-3 results in a shift in muscle metabolism toward the more efficient aerobic pathway, thus pointing that this polymorphism may have been involved in enhancing the capability for hunting and for cold adaptation. Here, we study rs1815739 polymorphism in native populations (Chukchi, Koryaks and Evens) and newcomers (Russians) of North-Eastern Asia. Materials and methods. Genomic DNA was isolated from peripheral blood. ACTN3 genotypes for rs1815739 locus were established by enzymatic digestion of amplicons with DdeI. Heterozygotes TT were confirmed by DNA sequencing. In addition, data on exome variation in Siberian populations were analyzed. Results. Lowered frequencies (less than 40%) of “mutant” allele rs1815739-T were found in studied populations of North-Eastern Asia. Analysis of exome data has shown that haplotype comprising the rs1815739-T allele reaches the highest frequencies in populations of Southern and Central Siberia, while it is rather rare in the north-east of Siberia. Conclusion. The results obtained contradict the hypothesis that the rs1815739 polymorphism may have been involved in cold adaptation of North-East Siberians.
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Yao, Yunpeng, Shen Xu, Shengli Lu, and Weifeng Sun. "Closed-Form Second-Order Power Transmission Characteristic Model of the Isolated Dual Active Bridge Converter." Journal of Clean Energy Technologies 4, no. 6 (2016): 384–88. http://dx.doi.org/10.18178/jocet.2016.4.6.318.

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Dorneles Callegaro, Alan, Denizar Cruz Martins, and Ivo Barbi. "Isolated Single-phase High Power Factor Rectifier Using Zeta Converter Operating In Dcm With Non-dissipative Snubber." Eletrônica de Potência 19, no. 4 (November 1, 2014): 423–29. http://dx.doi.org/10.18618/rep.2014.4.423429.

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Murdianto, Farid Dwi, Indhana Sudiharto, and Eni Wulandari. "Performance Evaluation Zeta Converter Using PI Controller for Energy Management in DC Nanogrid Isolated System." INTEK: Jurnal Penelitian 8, no. 1 (July 25, 2021): 37. http://dx.doi.org/10.31963/intek.v8i1.2651.

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Renewable energy is needed as an alternative energy source. One of the implementations of renewable energy is the Solar Power Plant (PLTS). PLTS is a component that uses solar cells to convert solar energy into electrical energy. Unfortunately, the output power of this solar cell depends on the intensity of the light which causes the output power to enter the load to be unstable. Sometimes the PV power decrease because of the shading effect. From this problem a converter is needed to keep the system output voltage. The converter used in this research is the zeta converter. This Zeta converter can operate like a buck boost converter. The output of the system used is not stable. So that to stabilize it requires good control. In this paper using PI controller to control this system in order to keep the output system stable. 3. The error generated using the PI Control on the system is only 0.34%.
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Dissertations / Theses on the topic "Isolated power converts"

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Di, Capua Giulia. "Models and methods for the design of isolated power converters in high-frequency high-efficiency applications." Doctoral thesis, Universita degli studi di Salerno, 2013. http://hdl.handle.net/10556/893.

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2011 - 2012
Isolated power supplies design requires the achievement of overall stress, losses, cost, size and reliability trade-off. This problem is of considerable importance in modern applications of power converters, as for energy saving issues as for the achievement of high power density capabilities needed to integrate the power supply into the same boards where the system they feed is hosted. The aim of this PhD dissertation is to discuss the fundamental issues regarding the design of high-efficiency high-power-density isolated power converters, related to the transformers design and to the system-level analysis of functional and parametric correlations existing among transformers and silicon devices in the achievement of high efficiency. Transformer design is the central issue in isolated switching power supplies design. Affording a preliminary reliable investigation of possible feasible power supply designs using off-the-shelf transformers can be of great help in reducing the time to prototyping and the time-to-market. Even though many off-the-shelf transformers are available today for standard applications, many special situations occur such that the design of a custom transformer is required. New design method are needed in order to enable a wider detection and investigation of possible transformer design solutions by means of a straightforward matching between the available magnetic cores, the operating conditions of the transformer to be designed and the design constraints to be fulfilled. A critical re-examination of transformers design methods discussed in technical literature has been afforded to highlighting some common misleading assumptions which can hinder the minimization of the transformer. Thus, a new design approach has been investigated and discussed, which helps in easily identifying possible transformer solutions in critical custom designs for a given application, complying with losses and size constraints. The new method is aimed at quickly identifying possible combinations of magnetic cores and windings turns number when many possible design might be feasible and a fast comparative evaluation is needed for preliminary cores selection. Novel geometric form factors of magnetic core (Kf and Kc) have been introduced and a consequent classification procedure for magnetic cores has been obtained, showing the correlation between the characteristics of the core and the specific applications in which each type of core offers major advantages in terms of minimizing losses and/or size. A magneto-electro-thermal macro model of the transformer has been adopted in order to investigate the dependency of total transformer losses on the temperature and to analyze the temperature sensitivity of form factor constraints of magnetic cores for power loss compliance. In particular, temperature-dependent boundaries curves both for the core window area and cross-section and for the form factors Kf and Kc have been obtained, allowing quick identification of feasible design solutions, complying with all design constraints, included thermal issues. Transformers and silicon devices do inextricably share the responsibility of major losses in isolated power supplies, and the optimization of the former normally impinges the one of the latter. As a consequence, the intimate correlation among these parts need to be jointly considered regarding the way the characteristics of one device influence the losses of the other one. In order to achieve reliable comparative evaluations among different design set-up, a new versatile numerical model for commutations analysis of power MOSFETs has been developed. The model takes into account the non-linear behavior of the inter-electrode capacitances and has been conceived to work as with parameters and information contained in the devices datasheets as with more detailed models. A Modified Forward Euler (MFE) numerical technique has been specifically developed and adopted in the realization of a numerical algorithm which solves the non linear system of differential equations describing the effect of parasitic capacitances in whatever operating conditions, in order to overcome the limitation exhibited by ODEs techniques for stiff problems in this particular application. The new MFE technique allows to compare the switching characteristics of MOSFETs with a good level of reliability and to obtain a detailed analysis of capacitive currents paths circulating between MOSFETs in half-bridge configuration during commutations. The numerical device-level model of the MOSFETs couples has been first tested in the analysis of basic non isolated synchronous rectification buck converter and then used into an integrated model allowing the analysis of Active Clamp Forward converters. It has been also demonstrated that the model adopted for the switching cell can be implemented in circuit simulators like Micro-Cap. The correlations existing between the parasitic parameters which characterize both transformer and MOSFETs and their impact on the switching behavior and the efficiency of such a conversion system can be effectively investigated by using such modeling approach, thus overcoming the limitations and unreliability of simplified analytical formulas for the prediction of the ZVS achievement. In particular, the integrated system model has been successfully used to determine the mutual constraint conditions between magnetic devices and solid state devices to achieve soft-switching, and their effects on the physical feasibility and design/selection of such power devices in order to achieve high efficiency. Experimental activities have been done to validate the methods and models proposed, through the implementation of on-line losses measurements techniques for both magnetic and solid state devices. The high switching frequency, high slew rates, high current and low leakage devices make such measures extremely sensitive to the parasitic circuit layout parameters. In order to achieve reliable measurements, non-conventional measurement techniques have been investigated based on the use of current sensing MOSFETs, and applied in the development and implementation of new measuring circuits. [edited by author]
XI n.s.
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Zhang, Xuan. "Switched Capacitor Circuit Based Isolated Power Converters." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1461327493.

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Ahmad, Khan Naveed. "Power Loss Modeling of Isolated AC/DC Converter." Thesis, KTH, Elektrisk energiomvandling, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-109717.

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Several research activities at KTH are carried out related to Isolated AC/DC converters in order to improve the design and efficiency. Concerning the improvement in the mentioned constraints, losses of the elements in the prototype converter are modeled in this thesis work. The obtained loss model is capable of calculating the losses under different circumstances. The individual contribution of losses for each element at different conditions can be obtained, which is further useful in improving the design and therefore, efficiency. The losses in different elements of the converter, including power semiconductor devices, RC-snubbers, transformer and filter inductor at different operating points can be computed by using the obtained model. The loss model is then validated by comparing the analytical results with the measurements. The results based on developed loss model show consistency with the measured losses. The comparison at different conditions shows that, the difference between measured and analytical results ranges between 10% to 20 %. The difference is due to those losses which are disregarded because of their negligible contribution. On the other hand, it is also observed that if the neglected losses are counted, the difference reduces up to 10%.
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York, Jr John Benson. "An Isolated Micro-Converter for Next-Generation Photovoltaic Infrastructure." Diss., Virginia Tech, 2013. http://hdl.handle.net/10919/19326.

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Photovoltaic (PV) systems are a rapidly growing segment in the renewable energy industry.  Though they have humble origins and an uncertain future, the commercial viability of PV has significantly increased, especially in the past decade.  In order to make PV useful, however, significant effort has to go into the power conditioning systems that take the low-voltage dc from the panel and create utility compatible ac output.  Popular architectures for this process include the centralized inverter and the distributed micro-inverter, each with its own advantages and disadvantages.  One attempt to retain the advantages of both architectures is to centralize the inverter function but construct PV panel-level micro-converters which optimize the panel output and condition the power for the inverter.  The main focus of this work is to explore the technical challenges that face the evolution of the dc-dc micro-converter and to use them as a template for a vertically integrated design procedure.

The individual chapters focus on different levels of the process:  topology, modulation and control, transient mitigation, and steady-state optimization.  Chapter 2 introduces a new dc-dc topology, the Integrated Boost Resonant (IBR) converter, born out of the natural design requirements for the micro-converter, such as high CEC efficiency, simple structure, and inherent Galvanic isolation.  The circuit is a combination of a traditional PWM boost converter and a discontinuous conduction mode (DCM), series resonant circuit.  The DCM operation of the high-frequency transformer possesses much lower circulating energy when compared to the traditional CCM behavior.  When combined with  zero-current-switching (ZCS) for the output diode, it results in a circuit with a high weighted efficiency of 96.8%.  Chapter 3 improves upon that topology by adding an optimized modulation scheme to the control strategy.  This improves the power stage efficiency at nominal input and enhances the available operating range.  The new, hybrid-frequency method utilizes areas where the modulator operates in constant-on, constant-off, and fixed-frequency conditions depending on duty cycle, the resonant period length, and the desired input range.  The method extends the operating range as wide as 12-48V and improves the CEC efficiency to 97.2% in the 250-W prototype.  Chapter 4 considers the soft-start of the proposed system, which can have a very large capacitive load from the inverter.  A new capacitor-transient limited (CTL) soft-start method senses the ac transient across the resonant capacitor, prematurely ending the lower switch on-time in order to prevent an excessive current spike.  A prototype design is then applied to the IBR system, allowing safe system startup with a range of capacitive loads from 2μF to 500μF and a consistent peak current without the need for current sensing.  Chapter 5 further investigates the impact of voltage ripple on the PV output power.  A new method for analyzing the maximum power point tracking (MPPT) efficiency is proposed based on panel-derived models.  From the panel model, an expression demonstrating the MPPT efficiency is derived, along with a ripple â "budgetâ " for the harmonic sources.  These ripple sources are then analyzed and suggestions for controlling their contributions are proposed that enable circuit designers to make informed and cost-effective design decisions.  Chapter 6 illustrates how results from a previous iteration can provide a basis for the next generation\'s design.  A zero-voltage-switching (ZVS) version of the circuit in Chapter 2 is proposed, requiring only two additional MOSFETs and one inductor on the low-voltage side.  The maximum switching frequency is then increased from 70kHz to 170kHz, allowing for a 46% reduction in converter volume (from 430cm3 to 230cm3) while retaining greater than 97% weighted efficiency.

Ph. D.
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Smith, Kenneth S. "CAD simulation of drive converters on isolated marine power systems." Thesis, University of Aberdeen, 1992. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU040411.

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Power electronic converters are being increasingly used on isolated marine power systems, to provide variable speed control of electric motors. As the rating of these drive converters increases, the converter load becomes a significant part of the total system load. Traditional methods for calculating the performance characristics, which assume the presence of an infinite busbar on the system, are not appropriate for such systems. The intercoupling which exists between system components such as synchronous generators, converters, and the drive motor must be included in the calculation. In this thesis, a commercially available software simulator Saber, is used to model a complete electrical cycloconverter propulsion drive, of the type which may be used for future Royal Navy frigates. This model includes the synchronous generators, cycloconverters, and induction motor drives. The simulation is performed in the time domain, which ensures that the intercoupling present between system components is preserved. The simulation is not restricted to one converter configuration, and has been used to investigate the relative merits of a number of possible converter connections. This method can be used to study drive performance under unbalanced conditions as well as for normal balanced operation. There is no perceived limit to the size, or complexity, of the converter systems which can be studied using this method. The only cost would be increased computer run times.
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Sarar, Stephen F. "A galvanically isolated power converter module for DC Zonal Electric Distribution Systems." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2006. http://library.nps.navy.mil/uhtbin/hyperion/06Mar%5FSarar.pdf.

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Thesis (M.S. in Electrical Engineering)--Naval Postgraduate School, March 2006.
Thesis Advisor(s): Robert W. Ashton, Andrew A. Parker. "March 2006." Includes bibliographical references (p. 73). Also available online.
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Soon, John Long. "Fault-Tolerant Design and Implementation for Non-Isolated Reconfigurable DC/DC Converters." Thesis, The University of Sydney, 2019. http://hdl.handle.net/2123/20266.

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This thesis mainly focuses on improving the conventional DC-DC converter topology by utilizing the redundancy concept (N+1) and fault-tolerant design to maintain an uninterrupted output operation even on primary switch failure. The proposed fault-tolerant converter (FTC) involves merging three configurations namely buck, boost and buck-boost to derive a new converter structure along with bidirectional capabilities. The proposed FTC is equipped with a single redundant switch and shared with one coupled inductor and one capacitor (1L-1C) to be capable of achieving the step-up and step-down operation. The major faults of the converter system are highly related to the power switching devices, which can be categorized as open circuit fault (OCF), and short circuit fault (SCF). The proposed fault diagnosis scheme is able to detect the OCF and SCF in less than half of the switching period by sampling the rising and failing edge of the pulsating signal to identify the switch fault behavior. Therefore, remedial action of the proposed FTC can be associated with the fault detection unit to anticipate the moment when the converter requires the activation of the redundant switches by providing a back-up operation. However, any reconfigurable decision is necessary to electrically isolate the faulty component in order to avoid the subsequent fault current within the circuit loop. The proposed method of isolation design adopts the joule-integral principle for selecting an appropriate rating between fuse and MOSFET pair. It provides the satisfactory result for protecting the proposed FTC. Finally, a converter reliability model is carried out based on Markov chain theory to formulate the mean time to failure (MTTF) profile for the proposed FTC. The reliability analysis shows that the proposed FTC can surpass the reliability performance of the conventional DC-DC converter through optimization of the circuit topology.
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Moon, Seung-Ryul. "Multiphase Isolated DC-DC Converters for Low-Voltage High-Power Fuel Cell Applications." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/32442.

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Fuel cells provide a clean and highly efficient energy source for power generation; however, in order to efficiently utilize the energy from fuel cells, a power conditioning system is required. Typical fuel cell systems for stand-alone and utility grid-tied stationary power applications are found mostly with low nominal output voltages around 24 V and 48 V, and power levels are found to be 3 to 10 kW [1][2]. A power conditioning system for such applications generally consists of a dc-dc converter and a dc-ac inverter, and the dc-dc converter for low-voltage, high-power fuel cells must deal with a high voltage step-up conversion ratio and high input currents. Although many dc-dc converters have been proposed, most deal with high input voltage systems that focus on step-down applications, and such dc-dc converters are not suitable for low-voltage, high-power fuel cell applications. Multiphase isolated dc-dc converters offer several advantages that are very desirable in low-voltage, high-power fuel cell applications. First, a multiphase is constructed with paralleled phases, which increase power rating and current handling capability for high input current. Second, an interleaving control scheme produces a high operating frequency with a low switching frequency, and the high operating frequency reduces size of passive components. Thirdly, use of a transformer provides electrical isolation and a high conversion ratio. Lastly, several multiphase converters are capable of soft-switching operation, which increases converter efficiency. This thesis examines two highly efficient, soft-switching dc-dc converters that are targeted for fuel cell applications. The thesis also describes the convertersâ basic operating principles and analyzes performance for low-voltage, high-power fuel cell applications. 5-kW prototypes for each converter are built and tested with a fuel cell simulator. Experimental switching waveforms and efficiency profiles are shown to support the described basic principles and the analysis. Major features and differences between these two converters are also discussed.
Master of Science
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Sterk, Douglas Richard. "Compact Isolated High Frequency DC/DC Converters Using Self-Driven Synchronous Rectification." Thesis, Virginia Tech, 2003. http://hdl.handle.net/10919/9648.

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In the early 1990's, with the boom of the Internet and the advancements in telecommunications, the demand for high-speed communications systems has reached every corner of the world in forms such as, phone exchanges, the internet servers, routers, and all other types of telecommunication systems. These communication systems demand more data computing, storage, and retrieval capabilities at higher speeds, these demands place a great strain on the power system. To lessen this strain, the existing power architecture must be optimized. With the arrival of the age of high speed and power hungry microprocessors, the point of load converter has become a necessity. The power delivery architecture has changed from a centralized distribution box delivering an entire system's power to a distributed architecture, in which a common DC bus voltage is distributed and further converted down at the point of load. Two common distributed bus voltages are 12 V for desktop computers and 48 V for telecommunications server applications. As industry strives to design more functionality into each circuit or motherboard, the area available for the point of load converter is continually decreasing. To meet industries demands of more power in smaller sizes power supply designers must increase the converter's switching frequencies. Unfortunately, as the converter switching frequency increases the efficiency is compromised. In particular, the switching, gate drive and body diode related losses proportionally increase with the switching frequency. This thesis introduces a loss saving self-driven method to drive the secondary side synchronous rectifiers. The loss saving self-driven method introduces two additional transformers that increase the overall footprint of the converter. Also, this thesis proposes a new magnetic integration method to eliminate the need for the two additional gate driver magnetic cores by allowing three discrete power signals to pass through one single magnetic structure. The magnetic integration reduces the overall converter footprint.
Master of Science
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Gallardo, Angelo Miguel Asuncion. "Design and Construction of 1800W Modular Multiple Input Single Output Non-Isolated DC-DC Converters." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1739.

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This thesis report details the design and construction of non-isolated DC-DC converters to create a Multiple Input Single Output (MISO) converter for combining multiple renewable energy sources into one single output. This MISO uses the four-switch buck-boost topology to output a single 48V from multiple nominal 24V inputs. The MISO converter implements a modular approach to deliver 1800W output power. Each module in the MISO is rated at 600W and they share the output power equally. Hardware results show that the converter produces 1800W of output power from three sources with 96.4% efficiency. Each module also demonstrates equal sharing feature of the MISO converter.
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Book chapters on the topic "Isolated power converts"

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Batarseh, Issa, and Ahmad Harb. "Isolated Switch-Mode DC-DC Converters." In Power Electronics, 273–345. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68366-9_5.

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Batarseh, Issa, and Ahmad Harb. "Non-isolated Switch Mode DC-DC Converters." In Power Electronics, 173–271. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68366-9_4.

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Neacșu, Dorin O. "Isolated DC/DC Converters: Flyback, Forward and Push-Pull." In Telecom Power Systems, 151–84. Boca Raton: CRC Press, 2017. http://dx.doi.org/10.4324/9781315104140-6.

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Kim, Ho-Sung, Myung-Hyo Ryu, Ju-Won Baek, Jong-Hyun Kim, and Hee-Je Kim. "High Efficiency Isolated Bidirectional AC-DC Power Converter." In Intelligent Robotics and Applications, 320–26. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-40849-6_30.

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Singh, Amit Kumar. "A Matrix Based Isolated Three Phase AC–DC Converter." In Analysis and Design of Power Converter Topologies for Application in Future More Electric Aircraft, 77–122. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8213-9_3.

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Naresh, S. V. K., and Sankar Peddapati. "Non-Isolated Quadratic Bidirectional DC-DC Converters for Renewable Energy Systems." In Advanced Power Electronics Converters for Future Renewable Energy Systems, 105–27. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003323471-5.

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Singh, Amit Kumar. "A Matrix Based Non-isolated Three Phase AC–DC Converter." In Analysis and Design of Power Converter Topologies for Application in Future More Electric Aircraft, 25–75. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-8213-9_2.

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Agarwal, Tanya, and Prakash Chittora. "PFC Isolated Cuk Converter Based Sensored BLDC Motor for the Application of Ceiling Fan." In Recent Advances in Power Electronics and Drives, 195–208. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7728-2_14.

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Venugopal, Arya, and Femi Robert. "A High Efficiency Isolated Bidirectional Reduced-Switch DC-DC Converter for Electric Vehicle Applications." In Recent Advances in Power Electronics and Drives, 59–72. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7728-2_5.

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Sanjeevikumar, Padmanaban, Mahajan Sagar Bhaskar, Pranav Dhond, Frede Blaabjerg, and Michael Pecht. "Non-isolated Sextuple Output Hybrid Triad Converter Configurations for High Step-Up Renewable Energy Applications." In Advances in Power Systems and Energy Management, 1–12. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4394-9_1.

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Conference papers on the topic "Isolated power converts"

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Islam, Rejaul, and Md Istianatur Rahman. "Comparative Performance Analysis of Isolated and Non-Isolated DC-DC Converters with Solar PV Array for EVs Application." In International Conference on Emerging Trends in Engineering and Advanced Science. AIJR Publisher, 2022. http://dx.doi.org/10.21467/proceedings.123.5.

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Modern day’s power electronics converters are very important for each and every electronic device such as portable devices, cell phones, laptop-computers, electric vehicles, etc. For the Electric Vehicles (EVs) the dc-to-dc converters are the best-suited and essential devices on account of their lightweight, high efficiency, smaller size, and high-power density, bi-directionality, reliability, cost-effectiveness. This paper provides a comparative study on non-isolated and isolated power dc-to-dc converters for EVs in which the main power source is PV (photo-voltaic) array module, in addition, a brief idea about design and calculation of passive components of power dc-to-dc isolated and non-isolated converters both in theoretically, and practically with simulation software. Here all the simulation results are tested by MATLAB simulation software and verified that the multi-phase multi-device interleaved boost dc-dc converter (MDIBC) is the best-suited candidate for both low and high power photo-voltaic based EVs due to their compact size, low cost, reliability, multifunctionality, bi-directionality, high efficiency, etc.
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Halder, T. "A topology selection: An isolated flyback converter." In 2016 IEEE 7th Power India International Conference (PIICON). IEEE, 2016. http://dx.doi.org/10.1109/poweri.2016.8077189.

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ANDRES, BERNARDO, LEONARDO ROMITTI, LUCIANO SCHUCH, LEANDO ROGGIA, and FABRíCIO HOFF DUPONT. "Analysis and Design of Isolated SEPIC Converter with Greinacher Voltage Quadrupler Multiplier Cell." In Seminar on Power Electronics and Control (SEPOC 2021). sepoc, 2021. http://dx.doi.org/10.53316/sepoc2021.049.

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High step-up converters are required and used in photovoltaic applications, due to low voltage of photovoltaic modules. In this paper, an isolated dc-dc high step-up SEPIC with a Greinacher voltage quadrupler cell is presented. It has the advantage of continuous input current, high efficiency, high voltage gain, isolation and demands a single switch, being suitable for low power grid-tie photovoltaic systems. The operating principles and steady-state analysis are presented, including the detailed analysis of resonant stage, where the value of primary side capacitor is taken into account and plays an important role in the design of the converter, since it directly affects the resonance frequency and RMS current values. Simulation results are presented to validate the analysis and design.
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Zhu, Jingpeng, Ming Xu, Julu Sun, and Chuanyun Wang. "Novel capacitor-isolated power converter." In 2010 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2010. http://dx.doi.org/10.1109/ecce.2010.5618141.

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Hwu, K. I., W. Z. Jiang, and Jenn-Jong Shieh. "Isolated voltage-boosting converter." In 2014 International Power Electronics Conference (IPEC-Hiroshima 2014 ECCE-ASIA). IEEE, 2014. http://dx.doi.org/10.1109/ipec.2014.6869581.

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Andres, Bernardo, Leonardo Romitti, Fabrício Hoff Dupont, Leandro Roggia, and Luciano Schuch. "Analysis and Design of Isolated SEPIC Converter with Greinacher Voltage Multiplier Cell." In Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1313.

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High step-up converters are required and used in photovoltaic applications, due to low voltage of photovoltaic modules. In this paper, an isolated dc-dc high step-up SEPIC with a Greinacher voltage doubler cell is presented. It has the advantage of continuous input current, high efficiency, high voltage gain, isolation and demands a single switch, being suitable for low power grid-tie photovoltaic systems. The operating principles and steady-state analysis are presented, including the detailed analysis of resonant stage, where the value of primary side capacitor is taken into account and plays an important role in the design of the converter, since it directly affects the resonance frequency and RMS current values. Simulation results are presented to validate the analysis and design.
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Yau, Y. T., Hung-Tsung Liang, and K. I. Hwu. "A Capacitive Isolated LLC Converter." In 2021 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2021. http://dx.doi.org/10.1109/apec42165.2021.9487065.

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Gevorkov, Levon, Jose Luis Dominguez-Garcia, and Alber Filba Martinez. "Modern Trends in MultiPort Converters: Isolated, Non-Isolated, and Partially Isolated." In 2022 IEEE 63th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON). IEEE, 2022. http://dx.doi.org/10.1109/rtucon56726.2022.9978910.

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Patel, Ankur. "An isolated step-up DC - DC converter using series connect Sine Amplitude Converters." In 2015 IEEE Applied Power Electronics Conference and Exposition (APEC). IEEE, 2015. http://dx.doi.org/10.1109/apec.2015.7104497.

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Bist, Vashist, and Bhim Singh. "Power factor correction in a brushless DC motor drive using an isolated-Luo converter." In 2014 6th IEEE Power India International Conference (PIICON). IEEE, 2014. http://dx.doi.org/10.1109/poweri.2014.7117627.

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