Gotowe bibliografie tematyczne / VOLTAGE CONVEYER

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Gotowa bibliografia na temat „VOLTAGE CONVEYER”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "VOLTAGE CONVEYER"

YUCE, ERKAN, KIRAT PAL i SHAHRAM MINAEI. "A HIGH INPUT IMPEDANCE VOLTAGE-MODE ALL-PASS/NOTCH FILTER USING A SINGLE VARIABLE GAIN CURRENT CONVEYOR". Journal of Circuits, Systems and Computers 17, nr 05 (październik 2008): 827–34. http://dx.doi.org/10.1142/s0218126608004733.

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In this paper, a novel circuit for realizing voltage-mode first-order and second-order all-pass filter responses as well as second-order notch filter response depending on the passive component choice, is presented. This circuit has high input impedance; thus, it is easy to cascade the introduced filter with other voltage-mode topologies. Also, it uses a single Variable Gain Current Conveyer — VGCCII and only grounded capacitors. SPICE simulation results based on 0.35 μm TSMC CMOS technology parameters are given to confirm the theory.

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Thongleam, Thawatchai, i Varakorn Kasemsuwan. "Feedforward Bulk-Driven Class AB Fully-Differential Second-Generation Current Conveyor (FDCCII)". Advanced Materials Research 979 (czerwiec 2014): 62–65. http://dx.doi.org/10.4028/www.scientific.net/amr.979.62.

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In this paper, a feedforward bulk-driven class AB fully-differential second-generation current conveyer (FDCCII) is presented. Bulk-driven differential pair is employed for the input stage allowing the FDCCII to operate with rail-to-rail operation. Feedfoward technique is also incorporated into input stage to increase the DC gain and minimize the common mode gain. The circuit performance is verified using HSPICE in 0.18 μm CMOS technology. The simulation results show rail-to-rail input and output swings. The DC voltage transfer characteristic between ports Y and X and DC current transfer characteristic between ports X and Z shows good linearity. The bandwidths show 25.7 MHz (VX/VY), 30 MHz (IZ/IX), respectively. The power dissipation is 267.5 μW.

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Lu, Wen Tao, i Yu Qing Li. "Research and Application of BPJV-1200/6K High Voltage Frequency Converter in Belt Conveyor". Applied Mechanics and Materials 494-495 (luty 2014): 1548–51. http://dx.doi.org/10.4028/www.scientific.net/amm.494-495.1548.

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In this paper, the BPJA-1200/6K mine-used high-voltage frequency converter designed and developed with Power Flex7000 is introduced. How to replace the fluid coupling used in original belt conveyor system with the converter to achieve the purpose of speed regulation by frequency variation as well as long distance driving are discussed. At the same time, the composition of the centralized control system for the belt conveyor is discussed and the speed regulation strategy and the main control functions are introduced. The converser system has been applied to a mine belt conveyor and the running results are better.

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Priya, E. Catherine Amala, i G. T. Sundar Rajan. "An improved model of hybrid multi converter used for grid connected applications". International Journal of Power Electronics and Drive Systems (IJPEDS) 10, nr 2 (1.06.2019): 860. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp860-867.

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A Hybrid multi converter topology is proposed in this paper, which supplies simultaneous voltage’s for various levels from Renewable energy source. The proposed topology is realized by replacing Multi cuk- buck converter topology. The resultant hybrid multi converter requires less number of switches to operate, as well as various output voltages of different levels without interruption with increased stability. This type of hybrid multi converter with high reliability and high stability are well implemented for loads utilizing various levels of DC voltage. Converter, proposed in this paper is called Hybrid Multi converter topology (HMCT). A study is made on the steady state of the HMCT and a comparative study has been made with the conventional designs. A PI controller based feedback controller is designed to stabilize the various output voltages. A simulated model for the proposed HMCT is used to simulate various output voltages of dissimilar values from mono DC- input. The performance of the converter is demonstrated using simulation model. The proposed design can be protracted to voltage source inverter, multilevel inverter to produce AC output.

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Kannan, Nithiyananthan, Nithiyananthan Kannan i Sunil Thomas. "MATLAB/Simulink based simulations of KY converter for PV panels powered LED lighting system". International Journal of Power Electronics and Drive Systems (IJPEDS) 10, nr 4 (1.12.2019): 1885. http://dx.doi.org/10.11591/ijpeds.v10.i4.pp1885-1893.

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<p>The main objective of this research work is to develop KY conveter topology for renewable energy sources.Solar energy is the readily available and is the cheapest form of energy. It is non-polluting and environment friendly. The development of high static gain DC-DC converters is an important research area due to the crescent demand of this technology for several applications supplied by low DC output voltage power sources. It is used to provide the uninterruptable power supply and battery powered to the system. So here, step-up DC-DC converters based on the KY converter are proposed for LED lighting systems. The proposed topologies present high voltages and high efficiency for low input voltage and high output voltage applications. The simulation results of the proposed topology have been presented using MATLAB/SIMULINK software.</p>

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Abdul Kadir, Mohamed N., Yasir M. Y. Ameen i Harith Al-Badrani. "Development of an efficient voltage regulation mechanism for switched capacitor converter with exponential gain". Eastern-European Journal of Enterprise Technologies 6, nr 5 (120) (30.12.2022): 18–28. http://dx.doi.org/10.15587/1729-4061.2022.270316.

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The compact switched-capacitor converter with exponential gain and modular design has been adopted in this paper. Two approaches have been applied to improve the efficiency by providing multiple no-load voltages. The first modifies the switching strategy to bypass the gain of one or more stages. The second introduces modified design that provide additional no-load voltages through alternative current paths. The voltage regulation is implemented by two control loops: The outer loop is designed to produce the minimum feasible no-load voltage and the inner loop adjusts the duty ratio of the switching signals to regulate the voltage to meet the desired reference. Switched capacitor converters have been used as voltage multipliers with constant voltage gain. The efficiency of a switched capacitor converter depends on the ratio between regulated to unregulated output voltage. Therefore, output voltage adjustment of these converters causes a significant efficiency reduction. By providing multiple no-load voltages within the output voltage range the efficiency of the switched capacitor converter can be improved. The proposed design has been applied to a three-stage converter to provide six no-load voltages. Simulation results demonstrate that the average efficiency over the entire output voltage range is more than 90 % of its maximum efficiency of the unregulated switched capacitor converter which reflects the effectiveness of the proposed scheme. This paper offers an efficient method to regulate the voltage of a modular switched capacitor converter with exponential gain. The advantages of the proposed design are small number of added components, does not require additional sources and suitable for higher power range

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Natheer, Sara Khalid, i Mohamad Natiq Abdul Kadir. "Maximum resolution of switched capacitor converter: a graphical approach". International Journal of Power Electronics and Drive Systems (IJPEDS) 13, nr 1 (1.03.2022): 330. http://dx.doi.org/10.11591/ijpeds.v13.i1.pp330-339.

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The efficiency of a switched capacitor converter can be represented as the ratio of the output voltage to open-circuit voltage. Switched capacitor converters with adjustable gain are designed with multiple no-load voltages to obtain higher efficiency over the voltage control range. This paper aims to realize the maximum resolution of a switched capacitor converter. A graphical representation of the output voltages formation has been proposed. The voltage composition diagram reveals a switching pattern of the multiphase operation cycle that leads to the desired output voltage. The proposed method has been applied to determine all possible output voltage levels that lead to maximum resolution. A three-capacitor converter has been controlled with the proposed scheme. The simulation results show that the output voltage follows the reference voltage closely. The converter provides 60% more output voltage steps compared to the nearest comparable design in the literature.

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Utomo, W. M., N. A. A. Isa, A. A. Bakar, A. F. H. A. Gani, B. E. Prasetyo, H. Elmunsyah i Y. M. Y. Buswig. "Voltage tracking of bridgeless PFC cuk converter using PI controller". International Journal of Power Electronics and Drive Systems (IJPEDS) 11, nr 1 (1.03.2020): 367. http://dx.doi.org/10.11591/ijpeds.v11.i1.pp367-373.

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This paper proposes a Proportional-Integral (PI) control voltage tracking of Bridgeless Power Factor Correction (BPFC) Cuk converter. In order to investigate the behaviour of different output voltages during overshoot, steady state and step response, P.I controller is designed to set the -42 V, -48 V, -54 V output voltages. The simulation results show that the proposed PI controller able to control the output voltage and achieve fast steady state and step response of BPFC Cuk converter. When the value of output voltage increase, the overshoot voltage will become higher but the steady state respond will be faster. Furthermore, BPFC Cuk converter with P.I controller have low output voltage ripples.

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Vaishnavi, Gatla, C. Venkatesh, Madikonda Rumitha i Abhishek Shanmukhan. "Single-Input Dual-Output Three-Level DC–DC Converter for EV". International Journal of Advance Research and Innovation 10, nr 1 (2022): 48–53. http://dx.doi.org/10.51976/ijari.1012208.

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This paper presents the development of a non-isolated single-input dual-output three-level dc–dc converter (SIDO-TLC) appropriate for medium- and high-voltage applications. 3 level Buck-Boost converter is used in order to achieve the controllable output voltages. The main merits of this project include reducing voltage stress across semiconductor devices, improving efficiency, and reducing passive components size. This converter shows very good stability, even under simultaneous step changes of the loads and input voltage. Simulation analysis of converter output voltages for various duty cycles is presented for three cases of duty cycle control range.

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Petrović, Predrag B., Milan Vesković i Slobodan Đukić. "Voltage mode electronically tunable full-wave rectifier". Journal of Electrical Engineering 68, nr 1 (1.01.2017): 61–67. http://dx.doi.org/10.1515/jee-2017-0008.

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Abstract The paper presents a new realization of bipolar full-wave rectifier of input sinusoidal signals, employing one MO-CCCII (multiple output current controlled current conveyor), a zero-crossing detector (ZCD), and one resistor connected to fixed potential. The circuit provides the operating frequency up to 10 MHz with increased linearity and precision in processing of input voltage signal, with a very low harmonic distortion. The errors related to the signal processing and errors bound were investigated and provided in the paper. The PSpice simulations are depicted and agree well with the theoretical anticipation. The maximum power consumption of the converter is approximately 2.83 mW, at ±1.2 V supply voltages.

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Rozprawy doktorskie na temat "VOLTAGE CONVEYER"

Jeong, Timothy. "Zero Voltage Switching Hybrid Voltage Divider Converter". DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2290.

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This project proposes a new hybrid voltage divider DC-DC converter that utilizes switching capacitors and inductors to produce zero voltage switching (ZVS) at the turn on state of its switches. By achieving ZVS, the switching losses are significantly reduced; thus, increasing the overall efficiency of the converter at various loads. The goal for this thesis is to perform analysis of the operation of the converter, derive equations for sizing the main components, and demonstrate its functionality through computer simulation and hardware prototype. Results of the simulation and hardware testing show that the proposed converter produces the desired output voltage while providing the zero voltage switching benefits. The converter’s efficiency reaches above 92% starting from 1A load and continues to increase to 97.6% at 4A load. Overall, results from this thesis verifies the potential of the proposed converter as an alternative solution to achieve a very efficient DC-DC solution when half of the input voltage is required at the output without the use of complex feedback control circuitry.

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El, Dbib Issa. "Low Voltage Current Conveyor Design Techniques". Doctoral thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2008. http://www.nusl.cz/ntk/nusl-233421.

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Disertační práce se zabývá proudovými konvejery CCII v proudovém modu s nízkým napájecím napětím. Potřeba velké rychlosti, vysokého výkonu a nízkého napájecího napětí pro mobilní elektroniku a komunikační systémy a potíže se současným stavem tlačí analogové návrháře k nalezení obvodové architektury a nové nízkopříkonové techniky. Je zde podrobně rozebrána technika složené kaskody a substrátu řízeného tranzistoru, která pomáhá produkci nízkopříkonových nízkovoltových obvodů. Dále jsou rozebrány a diskutovány základní funkční bloky, jako jsou proudová zrcadla, diferenční zesilovače a další, schopné pracovat při nízkých napájecích napětích. Jádrem práce je návrh konvejerů typu CCII s nízkým napájecím napětím. Jsou rozebrány jejich výhody a srovnání s konvenčními obvody. Princip a implementace operačního zesilovače založeného na proudovém konvejeru CCII je v práci navržen a popsán.

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Patel, Chirag. "A time-to-voltage converter". Ohio : Ohio University, 1999. http://www.ohiolink.edu/etd/view.cgi?ohiou1175794164.

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Xu, Ping. "High-frequency Analog Voltage Converter Design". PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4891.

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For many high-speed, high-performance circuits, purely differential inputs are needed. This project focuses on building high-speed voltage converters which can transfer a single-ended signal to a purely differential signal, or a differential input signal to a single-ended signal. Operational transconductance amplifier (OTAs) techniques are widely used in high-speed continuous-time integrated analog signal processing (ASP) circuits because resistors, inductors, integrators, buffers, multipliers and filters can be built by OT As and capacitors. Taking advantage of OT As, very-high-speed voltage converters are designed in CMOS technology. These converters can work in a frequency range from DC (OHz) up to lOOMHz and higher, and keep low distortion over a± 0.5V input range. They can replace transformers so that designing fully integrated differential circuits becomes possible. The designs are based on a MOSIS 2μm n-well process. SPICE simulations of these designs are given. The circuit was laid out with MAGIC layout tools and fabricated through MOSIS. The chip was measured at PSU and Intel circuit labs and the experimental results show the correctness of the designs.

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Wang, Xiangcheng. "HIGH SLEW RATE HIGH-EFFICIENCY DC-DC CONVERTER". Doctoral diss., University of Central Florida, 2006. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3196.

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Active transient voltage compensator (ATVC) has been proposed to improve VR transient response at high slew rate load, which engages in transient periods operating in MHZ to inject high slew rate current in step up load and recovers energy in step down load. Main VR operates in low switching frequency mainly providing DC current. Parallel ATVC has largely reduced conduction and switching losses. Parallel ATVC also reduces the number of VR bulk capacitors. Combined linear and adaptive nonlinear control has been proposed to reduce delay times in the actual controller, which injects one nonlinear signal in transient periods and simplifies the linear controller design. Switching mode current compensator with nonlinear control in secondary side is proposed to eliminate the effect of opotocoupler, which reduces response times and simplifies the linear controller design in isolated DC-DC converters. A novel control method has been carried out in two-stage isolated DC-DC converter to simplify the control scheme and improve the transient response, allowing for high duty cycle operation and large step-down voltage ratio with high efficiency. A balancing winding network composed of small power rating components is used to mitigate the double pole-zero effect in complementary-controlled isolated DC-DC converter, which simplifies the linear control design and improves the transient response without delay time. A parallel post regulator (PPR) is proposed for wide range input isolated DC-DC converter with secondary side control, which provides small part of output power and most of them are handled by unregulated rectifier with high efficiency. PPR is easy to achieve ZVS in primary side both in wide range input and full load range due to 0.5 duty cycle. PPR has reduced conduction loss and reduced voltage rating in the secondary side due to high turn ratio transformer, resulting in up to 8 percent efficiency improvement in the prototype compared to conventional methods.
Ph.D.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering

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Rowley, Anna Kaspartian. "A new zero-voltage-mode resonant converter". Thesis, Brunel University, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303182.

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Kazerani, Mehrdad. "Dyadic matrix converter theory : development, and application to voltage-source-converter type matrix converter". Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28794.

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For the past twenty years, the theoretical advance of the matrix converters has been impeded by the complexity arising from the time-varying trigonometric functions in their transformation matrix. In addition, the switching difficulties associated with the bidirectional switches have complicated the practical implementation of this class of converters.
In this thesis, the dyadic matrix structure and the a-b-c to d-q-0 transformation have been melded together to develop the dyadic matrix converter theory which is a generalized theory for the three-phase to three-phase matrix converters.
The thesis addresses the zero-sequence interaction in the matrix converters and the role of the zero-sequence elements in the Displacement Power Factor (DPF) correction on the utility-side, based on the Static VAR Controller (SVC) principle. Also, it is proved that using all the control degrees of freedom available, the dual condition of Unity Displacement Power Factor (UDPF) on side-1 and Field Vector Control (FVC) on side-2 can be established.
In this thesis, a new matrix converter topology, based on the three-phase voltage-source converters, has been proposed in which the switching difficulties reported in the conventional nine-bidirectional-switch topology have been bypassed. The theoretical expectations have been verified by the simulation as well as experimental tests on a laboratory prototype of the new matrix converter topology composed of three units of voltage-source converters each rated at 1 kVA.

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Xi, Youhao. "Zero voltage switching flyback and forward converter topologies". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ40214.pdf.

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Whitney, Jonas Alan. "Alternative topologies for the low-voltage buck converter". Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119559.

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Thesis: M. Eng., Massachusetts Institute of Technology, Department of Electrical Engineering and Computer Science, 2018.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (pages 145-146).
In this thesis, investigative work on and development of alternative topologies for the buck converter for low voltage dc dc conversion was performed. The three level buck, Resonant Switch Capacitor (ResSC), and Cuk-Buck2 were selected to be studied further based on the fact that they contain few components and were discovered in this work to have the possibility of operating at fixed frequency while smoothly regulating output voltage over the entire conversion ratio of 0 to 1. All three use a capacitive storage element in addition to a small inductance/s, so it was believed this may allow for efficiency or density improvements due to the excellent energy storage capability of MLCCs. New control methods were developed in order to operate the ResSC and Cuk-Buck2 at fixed frequency over the entire output range. New work was done to in order to achieve flying capacitor balancing in the ResSC and Cuk-Buck2, practical for future implementation in a monolithic converter. Simulated efficiency and other characteristics of the three converters are compared. Prototypes were built and used to confirm functionality of the new control schemes and balancing methods..
by Jonas Alan Whitney.
M. Eng.

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Borisov, Konstantin A. "Multifunctional voltage source converter for shipboard power systems". Diss., Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-06042007-142951.

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Książki na temat "VOLTAGE CONVEYER"

Zhang, Bo, i Dongyuan Qiu. Multi-terminal High-voltage Converter. Singapore: John Wiley & Sons Singapore Pte. Ltd, 2018. http://dx.doi.org/10.1002/9781119188346.

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Rowley, Anna Kaspartian. A New Zero-Voltage-Mode Resonant Converter. Uxbridge: Brunel University, 1986.

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C, Guerrini Nicola, red. Low-voltage low-power CMOS current conveyors. Boston: Kluwer Academic Publishers, 2003.

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Lian, Ryan Kuo-Lung. Real time digital simulation of a voltage source converter. Ottawa: National Library of Canada, 2003.

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Santos, Mauro, Jorge Guilherme i Nuno Horta. Logarithmic Voltage-to-Time Converter for Analog-to-Digital Signal Conversion. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15978-8.

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Sun, Sheng. Modelling and control of a series dual bridge GTO voltage source converter. Ottawa: National Library of Canada = Bibliothèque nationale du Canada, 1993.

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Center, Langley Research, red. Comparison of thermal coefficients for two microwave detectors: Diode/voltage-to-frequency converter and flash analog-to-digital converter. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 2001.

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Gruba, Mariusz. The closed-loop control of a series dual bridge GTO voltage source converter. Ottawa: National Library of Canada, 1994.

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Durie, A. F. Fixed link DC voltage converter with GTO devices for single phase traction drives. Birmingham: University of Birmingham, 1987.

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Stergiopoulos, Fotis. Analysis and control design of the three-phase voltage-sourced AC/DC PWM converter. Birmingham: University of Birmingham, 1999.

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Części książek na temat "VOLTAGE CONVEYER"

Do, Hyun-Lark. "Zero-Voltage-Switching Voltage Doubled SEPIC Converter". W Advances in Intelligent and Soft Computing, 51–54. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-25989-0_9.

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Abo-Khalil, Ahmed G., i Ali M. Eltamaly. "Voltage Source Converter Control Under Unbalanced Grid Voltage". W Control and Operation of Grid-Connected Wind Energy Systems, 57–72. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64336-2_3.

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Buxbaum, Arne, Klaus Schierau, Alan Straughen i R. Bonert. "Voltage Control of Converter Drives". W Design of Control Systems for DC Drives, 179–89. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-84006-7_25.

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Drubel, Oliver. "Converter Caused Shaft Voltages". W Converter Applications and their Influence on Large Electrical Machines, 109–34. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36282-8_7.

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Khobragade, Meghana, Harshit S. Dalvi i Prashant Jagtap. "Bidirectional Voltage Source Converter for Microgrid". W Smart Technologies for Energy, Environment and Sustainable Development, 29–40. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-6148-7_4.

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Islam, Md Rabiul, Youguang Guo i Jianguo Zhu. "Power Converter Topologies for Grid-Integrated Medium-Voltage Applications". W Power Converters for Medium Voltage Networks, 51–107. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44529-7_3.

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Drubel, Oliver. "Additional Losses Due to Higher Voltage Harmonics". W Converter Applications and their Influence on Large Electrical Machines, 45–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36282-8_4.

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Sharma, Dhanuj Kumar, Shweta Kumari i Maneesha Gupta. "Low-Voltage Low-Power DTMOS Based Second Generation Voltage Conveyor: Features and Design". W Lecture Notes in Electrical Engineering, 469–78. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-19-7993-4_39.

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Rana, Charu, Neelofer Afzal, Dinesh Prasad i Anu. "Low-Voltage Low-Power FGMOS-Based Current Conveyor III". W Advances in Power Systems and Energy Management, 673–81. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4394-9_66.

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Islam, Md Rabiul, Youguang Guo i Jianguo Zhu. "Experimental Validation of 1-kV Modular Multilevel Cascaded Converter with High-Frequency Magnetic Link". W Power Converters for Medium Voltage Networks, 189–225. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-44529-7_6.

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Streszczenia konferencji na temat "VOLTAGE CONVEYER"

Anand, Abhinav, i Rajeshwari Pandey. "A Novel Dual Output Schmitt Trigger Using Second Generation Voltage Controlled Conveyer". W 2022 International Conference on Intelligent Technologies (CONIT). IEEE, 2022. http://dx.doi.org/10.1109/conit55038.2022.9848259.

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Anand, Abhinav, i Rajeshwari Pandey. "Second Generation Voltage Conveyer based Comparator and its application as Pulse Width Modulator". W 2022 2nd Asian Conference on Innovation in Technology (ASIANCON). IEEE, 2022. http://dx.doi.org/10.1109/asiancon55314.2022.9908730.

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R. F. B. de Souza, Victor, Luciano S. Barros i Flavio B. Costa. "Performance Comparison of Converter Topologies for Double Fed Induction Generator-based Wind Energy Conversion Systems". W Congresso Brasileiro de Automática - 2020. sbabra, 2020. http://dx.doi.org/10.48011/asba.v2i1.1512.

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The advancements in power electronics have supported the widespread penetration of wind energy conversion systems (WECS) in electric grids. In this context, power converters have crucial functionality in the control of active and reactive power injection, moreover they are directly related to voltage and current harmonic distortion levels, mechanical and thermal stress that are experienced by the wind turbine. Currently, several topologies have been tested in order to improve the performance and increase the power processing of WECS to support the network demand. Based on the relevance of this issue, this paper presents a performance comparison of a Double Fed Induction Generator(DFIG)-based WECS employing three topologies of back-toback converters: two-level voltage source converter topology (2L-VSC), neutral point clamped (NPC) and modular multilevel converter (MMC). Simulation results present DFIG currents, voltages, torque, speed and the total harmonic distortion (THD), highlighting the performance improvement employing multilevel topologies and the impacts of using each topology.

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HOCH, HENRIQUE JAHNKE, TIAGO MIGUEL KLEIN FAISTEL, ADEMIR TOEBE i ANTóNIO MANUEL SANTOS SPENCER ANDRADE. "Conversor Doubler Output Coupled Inductor para Aplicações de Fontes Alternativas". W Seminar on Power Electronics and Control (SEPOC 2021). sepoc, 2021. http://dx.doi.org/10.53316/sepoc2021.003.

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High step-up DC-DC converters are necessary in photovoltaic energy generation, due the low voltage of the panels source. This article propose the Doubler Output Coupled Inductor converter. This converter is based in boost converter and utilize switched capacitors and a coupled inductor to maximize the static voltage gain. The converter achieve a high voltage gain with low turns ratio in the coupled inductor and an acceptable duty cycle. Can highlight the converter utilize low number of components and have low voltage and current stresses in semiconductors. To validate and evaluate the operation of the converter a 200W prototype is simulated.

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Biancuzzi, G., T. Lemke, F. Goldschmidtboeing, O. Ruthmann, H. J. Schrag, B. Vodermayer, T. Schmid i P. Woias. "Low Power Electronics for Square-Wave Piezoactuator Driving". W ASME 2009 International Mechanical Engineering Congress and Exposition. ASMEDC, 2009. http://dx.doi.org/10.1115/imece2009-12405.

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The German Artificial Sphincter System (GASS) project aims at the development of an implantable sphincter prosthesis driven by a micropump. During the last few years the feasibility of the concept has been proven. At present our team’s effort is focused on the compliance to safety regulations and on a very low power consumption of the system as a whole. Therefore a low-voltage multilayer piezoactuator has been developed to reduce the driving voltage of the micropump from approximately 300 Vpp to 40 Vpp. Doing so, the driving voltage is within the limits set by the regulations for active implants. The operation of the micropump at lower voltages, achieved using multilayer piezoactuators, has already resulted in a much better power efficiency. Nevertheless, in order to further reduce power consumption, we have also developed an innovative driving technique that we are going to describe and compare to other driving systems. A direct switching circuit has been developed where the buffer capacitor of the step-up converter has been replaced by the equivalent capacitance of the actuator itself. This avoids the switching of the buffer capacitor to the actuator, which would result in a very low efficiency. Usually, a piezoactuator needs a bipolar voltage drive to achieve maximum displacement. In our concept, the voltage inversion across the actuator is done using an h-bridge circuit, allowing the employment of one step-up converter only. The charge stored in the actuator is then partially recovered by means of a step-down converter which stores back the energy at the battery voltage level. The power consumption measurements of our concept are compared to a conventional driving output stage and also with inductive charge recovery circuits. In particular, the main advantage, compared to the latter systems, consists in the small inductors needed for the power converter. Other charge recovery techniques require very big inductors in order to have a significant power reduction with the capacitive loads we use in our application. With our design we will be able to achieve approximately 55% reduction in power consumption compared to the simplest conventional driver and 15% reduction compared to a charge recovery driver.

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Zafar, Muhammad Hamza, Majad Mansoor, Noman Mujeeb Khan i Filippo Sanfilippo. "Optimal Tuning of PID Controller for Boost Converter using Meta-Heuristic Algorithm for Renewable Energy Applications". W International Conference on Mechanical, Automotive and Mechatronics Engineering. Aksaray: ECER, 2023. http://dx.doi.org/10.53375/icmame.2023.32.

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The Dynamic Levy Flight Chimp optimisation (DLFC) method is used in this study to optimise the Proportional- Integral-Derivative (PID) Controller for the Boost converter. As a possible application, the tuned PID controller is utilised to adjust voltages in the use of renewable power sources. The maximum power point tracking control approach based on machine learning (ML) is used to anticipate the reference voltages for the solar system based on the irradiance and the ambient temperature. The tuned PID controller uses this reference signal to regulate the maximum power point (MPP) voltages. To finetune the PID controller, comparisons are done with grey wolf optimiser (GWO), Harris hawk optimisation algorithms (HHO), and particle swarm optimisation (PSO) algorithms. The tuned PID controller has fewer oscillations and requires little tracking time to adapt to changing load and environment conditions. Additionally, statistical analysis, such as Mean Absolute Error (MAE) and Root Mean Square Error (RMSE) between the reference voltage and the output voltage, is presented. Since the DLFC tuned PID controller performs better than HHO, GWO, and PSO in terms of RMSE and MAE, it may be a promising way for optimising PID controller tuning for boost converters in photovoltaic (PV) system applications.

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Laury, John, Lars Abrahamsson i Math Bollen. "Modified Voltage Control Law for Low Frequency Railway Power Systems". W 2017 Joint Rail Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/jrc2017-2224.

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In today’s Swedish and Norwegian low frequency railway power system the voltage at a converter is controlled such that its voltage will drop with increased reactive power output. However, for low frequency railways the influence of active power on voltage is larger compared to public power systems and alternative methods are interesting to investigate. This paper presents a modified voltage control law for increased load sharing between converter stations and reduce the risk for converter overload in low frequency railways power systems. The modified voltage control law is derived mathematically and tested with different droops for two case studies. The results confirms the increased load sharing between the converter stations. The results are analysed and discussed; ideas are presented to counteract some of the negative impacts of the modified voltage control law.

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Yen, W. W., i Paul C. P. Chao. "A Novel Energy Harvester in a Backpack via Precision Sensing of Back Electromotive Force". W ASME 2020 29th Conference on Information Storage and Processing Systems. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/isps2020-1918.

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Abstract In this paper, swop fly-back converter, a new type of fly-back converter, was proposed. It is controlled by constant-on time, a strategy of pulse frequency modulation with boundary conduction mode. Due to the structure of swop fly-back converter and the boundary conduction mode control strategy, the energy delivery to battery is proportional to the voltage of coupled capacitor of swop fly-back converter which changed the position of the metal-oxide-semiconductor field-effect transistor and the capacitor instead of measuring input voltage and input current. Thus, the energy was estimated by measuring the voltage of coupled capacitor. The previous test shows that the voltage of coupled capacitor sensing which is measured by 10-bit ADC is good. The peak voltage is 4.036 V, the ADC value is 1009 digi, and it induced average power 1.25W for striding and 2W for jogging.

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Sadaf, Shima, Nasser Al-Emadi, Atif Iqbal, Mohammad Meraj i Mahajan Sagar Bhaskar. "A Novel Modified Switched Inductor Boost Converter with Reduced Switch Voltage Stress". W Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0090.

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DC-DC power converters are necessary to step-up the voltage or current with high conversion ratio for many applications e.g. photovoltaic and fuel cell energy conversion, uninterruptible power supply, DC microgrid, automobile, high intensity discharged lamp ballast, hybrid vehicle, etc. in order to use low voltage sources. In this project, a modified SIBC (mSIBC) is proposed with reduced voltage stress across active switches. The proposed mSIBC configuration is transformerless and simply derived by replacing one diode of the classical switched inductor structure with an active switch. As a result, mSIBC required low voltage rating active switches, as the total output voltage is shared between two active switches. Moreover, the proposed mSIBC is low in cost, provides higher efficiency and required the same number of components compared to the classical SIBC. The experimental results are presented which validated the theoretical analysis and functionality, and the efficiency of the designed converter is 97.17%. The proposed mSIBC converter provides higher voltage conversion ratio compared to classical converters e.g. boost, buck-boost, cuk, and SEPIC. The newly designed configurations will aid the intermediate power stage between the renewable sources and utility grid or high voltage DC or AC load. Since, the total output voltage is distributed among the two active switches, low voltage rating switches can be employed to design the power circuit of the proposed converter. The classical boost converter or recently proposed switched inductor based boost converter can be replaced by the proposed mSIBC converter in real-time applications such as DC microgrid, DC-DC charger, battery backup system, UPS, EV, an electric utility grid. The proposed power circuitry is cost effective, compact in size, easily diagnostic, highly efficient and reliable.

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Singh, Gopal, Santiago Lentijo i Kalpathy Sundaram. "The Impact of the Converter on the Reliability of a Wind Turbine Generator". W ASME 2019 Power Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/power2019-1966.

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Abstract Temperature rise is one of the limiting factors in generator design. Bearings and windings failure are the two most prominent cause of generator failure in the wind turbine application. The generator is mostly converter-fed in the wind turbine application, and operation with converter brings specific challenges. Insulation of generator system should be designed in such a way to withstand these challenges. Two immediate problems with converter-fed wind generators are winding temperature rise due to harmonic losses and voltage peaks. Voltage peaks generated by converter can create a winding hotspot and eventually destroy the insulation system of generator winding, which leads to reducing the lifetime of the insulation system. Turbine availability study from a commercial point of view is presented. For selecting the winding insulation system, it is essential to know the environment generator is going to operate. Specific voltage peaks from different converter systems can damage windings insulation. Damage insulation brings the downtime of the turbine, which affects the LCOE and AEP of the wind turbine. The electrical voltage between motor terminals and ground can be generated due to the different converter output circuit, longer feeder cables (when converter being placed on the basement and not in the nacelle) on the and unfavorable grounding conditions. Paper discusses voltage peaks due to operation with converter and make a recommendation for the winding insulation system, for a particular case. A better selection procedure for a generator winding insulation system is recommended.

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Raporty organizacyjne na temat "VOLTAGE CONVEYER"

Xu, Ping. High-frequency Analog Voltage Converter Design. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.6767.

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Fursin, Leonid, Maurice Weiner, Jason Lai, Wensong Yu, Junhong Zhang, Hao Qian, Kuang Sheng, Jian H. Zhao, Terence Burke i Ghassan Khalil. Development of Compact Variable-Voltage, Bi-Directional 100KW DC-DC Converter. Fort Belvoir, VA: Defense Technical Information Center, czerwiec 2007. http://dx.doi.org/10.21236/ada520263.

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Geller, J. A DIGITAL VOLTAGE to FREQUENCY CONVERTER for the BOOSTER GAUSS CLOCK. Office of Scientific and Technical Information (OSTI), lipiec 1990. http://dx.doi.org/10.2172/1150553.

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