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Добірка наукової літератури з теми "Voltage generator and current generator"

Автор: Grafiati
Опубліковано: 30 травня 2022
Оновлено: 31 травня 2022

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Статті в журналах з теми "Voltage generator and current generator"

1

Azis, Hastuti, Pawenary Pawenary, and Meyhart Torsna Bangkit Sitorus. "Simulasi Pemodelan Sistem Eksitasi Statis pada Generator Sinkron terhadap Perubahan Beban." Energi & Kelistrikan 11, no. 2 (July 30, 2019): 46–54. http://dx.doi.org/10.33322/energi.v11i2.483.

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Excitation system is one of the most important parts of synchronous generators, where the system functions to provide dc power to the field generator coil. Iin this study, a static excitation system consisting of transformers and connected thyristors in bridge configuration has been implemented in synchronous machines that operate as 206,1 mva capacity generators, 16,5 kv using the help of matlab simulink r2017b software. By adjusting the load given to the generator, variations in excitation currents can affect the amount of output voltage generated by the generator so that it can increase and decrease the induced voltage. In full load conditions, namely p = 175 mw, q = 100 mvar, the results of the study show that when the simulation is run at alpha 0 °, it is known that the average value of dc voltage is 496,4 v, excitation current is 1057 a and voltage generator output has increased beyond its nominal voltage of 16,72 kv. in this case, to maintain the terminal voltage, the excitation current must be reduced by increasing the angle of shooting of the thyristor to an alpha angle of 45 °, so that the average dc voltage can be reduced to 479,3 v, as well as the excitation current to 985,9 a. the generator output voltage at the alpha 45 ° angle is obtained according to its nominal value of 1,.5 kv.
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2

Zalhaf, Amr, Mazen Abdel-Salam, and Mahmoud Ahmed. "An Active Common-Mode Voltage Canceler for PWM Converters in Wind-Turbine Doubly-Fed Induction Generators." Energies 12, no. 4 (February 21, 2019): 691. http://dx.doi.org/10.3390/en12040691.

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Анотація:
Wind energy integration in power grids is increasing day by day to reduce the use of fossil fuels, and consequently greenhouse gas emissions. Using the pulse-width modulated (PWM) power converters in wind turbine generators, specifically in doubly-fed induction generators, results in generating a common-mode voltage (CMV). This common-mode voltage causes a flow of common-mode current (CMC) that leaks through the stray capacitances in the generator structure. These currents impose a voltage on the generator bearing which may deteriorate them. In the current work, an active common-mode voltage canceler (ACMVC) is developed to eliminate the CMV produced by a PWM converter. The ACMVC generates a compensating voltage at the converter terminals to eliminate the CMV with a subsequent reduction of the voltage stress on the generator bearing. This compensating voltage has the same amplitude as CMV, but opposite polarity. A simulation of the ACMVC model is performed using the PSCAD/EMTDC (Electromagnetic Transient Design and Control) software package. Results confirm the effectiveness of ACMVC in canceling not only the CMV but the CMC and bearing voltage as well. In addition, the relationship between the rise time of CMV and the peak value of CMC is investigated.
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3

Veinović, Slavko, Žarko Janda, Đorđe Stojić, Jasna Dragosavac, Dušan Joksimović, Ilija Klasnić, and Milan Đorđević. "Load angle estimation of synchronous generator." Zbornik radova Elektrotehnicki institut Nikola Tesla 30, no. 30 (2020): 81–91. http://dx.doi.org/10.5937/zeint30-29158.

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Анотація:
In this paper a load angle estimation method of round rotor synchronous generator is presented, for load angle limiter in AVR systems design purpose. To get information of load angle, it is necessary to have values of the one terminal voltage, one phase current and q-axis reactance Xq. Mentioned values are acquired by synchronous sampling technique and processed by discrete Fourier transformation. The accuracy of presented method highly depends on quality of zero-crossing detection of the input voltage signal and on the calculation estimation of the fundamental frequency. This method is of reduced sensitivity to higher harmonics presence contence in voltages and current waveforms. Another advantage, when compared to other dq or ab based calculations estimations, is the necessity of use only two measurement channels. Drawback of described approach is lack of immunity to current asymmetry. However, a solution to overcome this problem is offered by introducing the additional measurements into the algorithm to extract the synchronous sampled direct components of all three phase currents.
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4

Oktaviani, Wiwin A., Taufik Barlian, and Yosi Apriani. "Studi Awal Karakteristik Tegangan Ouput Generator Magnet Permanen dan Generator DC pada Turbin Kubah Masjid Putar." Electrician 14, no. 2 (May 15, 2020): 56–63. http://dx.doi.org/10.23960/elc.v14n2.2149.

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Intisari — Setiap yang berputar memiliki potensi energi kinetik, tidak terkecuali putaran kubah masjid. Penelitian ini bertujuan untuk mengetahui potensi pemanfaatan kubah putar masjid sebagai penghasil energi listrik skala kecil. Generator yang diuji cobakan adalah generator magnet permanen dan generator DC yang dirangkaikan dengan turbin kubah putar. Pengujian dilakukan di dua lokasi, di Jembatan Musi 2 Palembang dan di perairan Sungsang Kabupaten Banyuasin untuk mengukur besaran tegangan dan arus output yang dihasilkan pada berbagai kecepatan angin menggunakan multimeter dan anemometer. Hasil penelitian menunjukkan bahwa tegangan yang dihasilkan oleh putaran kubah masjid menggunakan generator magnet permanen mampu mencapai 14,21 V pada kecepatan angin 3,8 m/det dibandingkan dengan generator DC yang hanya mencapai 3 V pada kecepatan angin 8 m/det. Jika ditinjau dari besaran arus, generator magnet permanen menghasilkan arus konstan sebesar 0,3 A sedangkan pada generator DC arus yang dihasilkan tidak terukur karena nilainya yang amat kecil. Penelitian ini menunjukkan bahwa kubah putar masjid dapat dijadikan sebagai turbin angin pada daerah yang memiliki kecepatan angin rendah. Kata kunci — kubah masjid putar,generator magnet permanen,generatorDC, turbin angin kecepatan rendah Abstract - Every spinning has kinetic energy potential; the mosque dome is no exception. This study aims to determine the potential use of the mosque's turning dome as a producer of small-scale electrical energy. Two types of the generator were tested, which were permanent magnet generator and DC generator, which were coupled with a rotary dome turbine. The test was carried out at two locations, at Palembang Musi 2 Bridge and in the waters of Sungsang, Banyuasin Regency, to measure the amount of voltage and output current generated at various wind speeds using a multimeter and anemometer. The results showed that the voltage generated by the mosque's dome rotation using a permanent magnet generator was able to reach 14.21 V at wind speeds of 3.8 m / sec compared to DC generators, which only reached 3 V at 8 m / s wind speed. When viewed from the amount of current, permanent magnet generators produce a constant current of 0.3 A while in DC generators, the current generated is not measurable because the value is minimal. This research shows that the mosque's rotary dome can be used as a wind turbine in areas that have low wind speeds. Keywords - rotary mosque domes, permanent magnet generators, generator DC, low speed wind turbines
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5

Najma Safienatin Najah, Arief Muliawan, and Febria Anita. "Perancangan Prototipe Turbin Angin Sumbu Horizontal Skala Laboratorium Dengan Inverter." Jurnal Teknik Juara Aktif Global Optimis 1, no. 1 (June 30, 2021): 24–29. http://dx.doi.org/10.53620/jtg.v1i1.7.

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Анотація:
A horizontal axis wind turbine design research has been carried out using an inverter. This study aims to generate the output power generated by the generator through an inverter. So that the use of an inverter can turn on the 10 watt lamp. From the research results obtained turbine rotation varied between 1357 rpm to 2415 rpm producing a generator voltage of 3.05 volts to 4.61 volts and generator currents 32mA up to 49 mA. The inverter produces a voltage of 16.57 volts up to 20.46 volts and an inverter current of 0.60 amperes up to 0.48 amperes. The greater the rotation of the wind turbine turbine, the greater the generator voltage generated and so is the voltage of the inverter. While the current will increase as the turbine rotation increases and the inverse of the inverter current will decrease as the turbine rotation increases.
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6

Enemor, C. G., D. C. Idoniboyeobu, and S. L. Braide. "Performance Analysis of Synchronous Reluctance Generator." International Journal for Research in Applied Science and Engineering Technology 10, no. 5 (May 31, 2022): 765–74. http://dx.doi.org/10.22214/ijraset.2022.41501.

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Анотація:
Abstract: The synchronous reluctance generators are a species of self-excited generators such as the induction generators. The self-excited synchronous reluctance generator (SynRG) has become a promising and viable replacement of self-excited induction generator because of the supply frequency dependence on the prime speed and not load. The self-excited synchronous reluctance generator has high reliability, low cost and robustness and capacity of variable speed operation. The aim of this research is to carry out performance analysis of shunt connected three-phase synchronous reluctance generator feeding an R-L load. The dynamic analysis is based on the classical d-q model where equations for electrical quantities were derived and implemented using a computer simulation tool, MATLAB®. The equations for steady state analysis were derived from the dynamic equations by setting all time variables to zero. The dynamic analysis was carried out on a 4-pole, speed of 1500 rpm with connected load at a fixed excitation capacitor value of 50uF for a 2.5kVA machine. Effect of excitation-capacitance variation and loadingconditions variation on the generated output voltage and frequency are presented and discussed. The load variations were done based on energy-current perturbation at a fixed power factor of 1.0. The load variations were done at several points and result shows that with the variations in the connected loads, the output frequency of the synchronous reluctance generator remains constant, which makes it a good alternative for induction generator. On the steady state analysis, it was discovered that on increasing the excitation capacitor, the terminal voltage increases as well as the output power. The result specifically revealed that when the capacitance increases from 25uF to 45uF, the terminal voltage and the output power increases from 200volts to 300volts; and 200watt to 1700watt. Therefore, it is recommended that to ensure machine excitation, the capacitor should not be reduced below a certain value. The study is beneficial for operation of an isolated power supply. Keywords: Synchronous Reluctance Generator, Direct Current and Indirect Current
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7

Wu, Xiushan, Yanzhi Wang, Siguang An, Jianqiang Han, and Ling Sun. "A Four Quadrature Signals’ Generator with Precise Phase Adjustment." Journal of Electrical and Computer Engineering 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/2138794.

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Анотація:
A four-way quadrature signals generator with precise phase modulation is presented. It consists of a phase precision regulator and a frequency divider. The phase precision regulator generates two programmable currents by controlling the conduction of the tail current sources and then changes the currents into two bias voltages which are superimposed on the clock signals to adjust the phase difference of the four quadrature signals generated by the frequency divider, making the phase difference of 90 degrees. The four quadrature signals’ generator with precise phase modulation has been implemented in a 0.18 μm mixed-signal and RF 1P6M CMOS technology. The size of the chip including the pads is675 μm⁎690 μm. The circuit uses a supply voltage of 1.8 V, a bias current of 7.2 μA, and the bits of phase-setting input leveln=6in the design. The measured results of the four orthogonal signals’ phase error can reach ±0.1°, and the phase modulation range can reach ±3.6°.
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8

Amin, Darojatul, Trapsilo Prihandono, and Alex Harijanto. "ANALISIS LOST ENERGY PADA OVERUNITY GENERATOR MAGNET PERMANEN DENGAN PROTOTIPE DINAMO JENIS FLUKS RADIAL." JURNAL PEMBELAJARAN FISIKA 11, no. 1 (April 1, 2022): 28. http://dx.doi.org/10.19184/jpf.v11i1.30638.

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Анотація:
The practice of overunity generators that is developing in the community is quite worrying due to the lack of clear sources of information. The aim of this research is to provide a conceptual overview of the overunity generator through a description of the system and the energy conversion process in the overunity machine. This concept surgery method uses lab tests to get accurate measurement data. By using the modeling of two dynamos connected into a series circuit, the test is carried out by providing electrical energy with different voltage variations to obtain data in the form of output voltage, output current, and rotational speed. The results obtained indicate that there is lost energy in the overunity generator due to the relatively low engine specifications and the limited ability of the motor and generator to convert energy. Where the output generated by the overunity generator has a very large difference compared to the input energy given. Which means that the overunity of the system has not been fully proven in the practice of overunity generators. Key word: overunity, generator, lost energy
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9

Kwok, C. Y. "Low-voltage peaking complementary current generator." IEEE Journal of Solid-State Circuits 20, no. 3 (June 1985): 816–18. http://dx.doi.org/10.1109/jssc.1985.1052389.

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10

Kozak, Maciej. "Initial Excitation Issues of Synchronous Generator with VSI Inverter in Varying Rotational Speed Operation." Multidisciplinary Aspects of Production Engineering 1, no. 1 (September 1, 2018): 377–83. http://dx.doi.org/10.2478/mape-2018-0048.

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Анотація:
Abstract Synchronous self-excited generators still are and probably will be the most popular 3-phase alternators installed in inland power stations so onboard of seagoing ships. Because of fuel savings and environmental restrictions Diesel, dual-fuel and gas propulsion engines for alternators of wide-range varying revolutions drives are increasingly used. There must be efficient way of creating 3-phase voltages of desired constant parameters ensured when generator produces variable amplitudes and frequencies of voltages because of changing rotational speed. As the control method modified field oriented control widely used with squirrel cage induction machines was chosen. This control method involves decoupling of currents and control voltages to flux and torque components and keeping them in optimal (orthogonal) condition. In order to obtain proper excitation and operation of such generator several factors have to be taken into account. Nonlinear dependence of voltage generated from rotational speed of self-excited synchronous generator is one of the factors that affects initial excitation process thus specific control method while generator startup. Theoretical background of synchronous generator excitation and voltage source inverter adopted FOC control method along with experimental results obtained in laboratory test bench of 5,5 kW generator and conclusions were presented.
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Більше джерел

Дисертації з теми "Voltage generator and current generator"

1

Mylonas, Georgios. "Programmable voltage reference generator for a SAR-ADC." Thesis, Linköpings universitet, Elektroniksystem, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-98567.

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Анотація:
SAR-ADCs are very popular and suitable for conversions up to few tens of MHz with 8 to 12 bits of resolution. A very popular type is the Charge Redistribution SAR-ADC which is based on a capacitive array. Higher speeds can be achieved by using the interleaving technique where a number of SAR-ADCs are working in parallel. These speeds, however, can only be achieved if the reference voltage can cope with the switching of the capacitive array. In this thesis the design of a programmable voltage reference generator for a Charge Redistribution SAR-ADC was studied. A number of architectures were studied and one based on a Current Steering DAC was chosen because of the settling time that could offer to the Charge Redistribution SAR-ADC switching operation. This architecture was further investigated in order to spot the weak points of the design and try to minimize the settling time. In the end, the final design was evaluated and possible trimming techniques were proposed that could further speed up the design.
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2

Alla, Ravi Chandar. "Design and Implementation of an analog to digital conversion mechanism for an in-situ monitoring microelectrode SOC." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1227042824.

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3

Laotaveerungrueng, Noppasit. "A High-Voltage, High-Current Multi-Channel Arbitrary Waveform Generator ASIC for Neural Interface and MEMS Applications." Case Western Reserve University School of Graduate Studies / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=case1291675462.

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4

Liu, Jingbo. "Modeling, analysis and design of integrated starter generator system based on field oriented controlled induction machines." Columbus, Ohio : Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1132763176.

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5

Baggu, Murali Mohan. "Advanced control techniques for doubly fed induction generator-based wind turbine converters to improve low voltage ride-through during system imbalances." Diss., Rolla, Mo. : Missouri University of Science and Technology, 2009. http://scholarsmine.mst.edu/thesis/pdf/Baggu_09007dcc806684bd.pdf.

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Анотація:
Thesis (Ph. D.)--Missouri University of Science and Technology, 2009.
Vita. The entire thesis text is included in file. Title from title screen of thesis/dissertation PDF file (viewed May 27, 2009) Includes bibliographical references (p. 126-130).
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6

Weissbach, Joel. "Measuring forces on a hydropower generator using strain gages." Thesis, Uppsala universitet, Elektricitetslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-256575.

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Анотація:
Increased awareness concerning our energy consumption and its environmentaleffects, has led to a high demand for renewable energies. Hydropower providesaround 40 percent of the electric energy consumed in Sweden today. If energyefficiency and production time were to increase only by some percent in thehydropower plants, vast amounts of additional renewable energy could besupplied to the electric grid. The Hydropower group at Uppsala University usesa hydropower generator to localize and decrease some of the power losses andthe wearing in the generator. New equipment is being tested and evaluated onthe generator. By measuring static and dynamic forces in the generator broaderinsight can be reached during these tests. This thesis describes the development of a system measuring forces on ahydropower generator using strain gages. Each sensor node is equipped withfour strain gages and a signal conditioning circuit. The system measures strain inthe generator, converts it to a voltage signal, amplifies it, filters and transmits it.After calibration of the nodes, forces can be extracted indirectly. This thesisdescribes considerations made during design of the system as well as its differentparts and configurations.
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7

Веселова, Надія Вікторівна. "Становлення і розвиток харківських наукових шкіл у галузі техніки та електрофізика високих напруг (1930–2010 рр.)". Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17177.

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Анотація:
Дисертація на здобуття наукового ступеня кандидата історичних наук за спеціальністю 07.00.07 – історія науки і техніки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2015. У дисертації комплексно досліджується створення та розвиток харківських наукових шкіл у галузі техніки та електрофізики високих напруг у 1930–2010 рр. В роботі визначені харківські наукові школи в цій галузі, а саме: наукова школа високовольтних прискорювачів в УФТІ, яку очолив академік АН УРСР А. К. Вальтер; наукова школа техніки високих напруг ХПІ, засновником якої став академік АН УРСР В. М. Хрущов; наукова школа магнітно-імпульсної обробки металів ХПІ, що була заснована проф. І. В. Білим. Проведено цілісний науково-історичний аналіз процесу виникнення технічних рішень в електрофізиці і створення установок високої напруги в провідних харківських наукових центрах. Розкрито процес формування складу наукових установ і лабораторій, внесок окремих вчених у розвиток техніки і електрофізики високих напруг в м. Харкові. Показана важливість та унікальність створених високовольтних установок, визначено передумови їх створення та досліджено застосування цих пристроїв у вітчизняній науці та промисловості.
The thesis for the competition of the academic degree of the candidate of the historical sciences, the speciality 07.00.07 – The history of science and technique. – National Technical University "Kharkiv Polytechnic Institute". – Kharkiv, 2015. The thesis is devoted to the complex research of the establishment and the development of Kharkiv scientific schools in the field of the technique and the electrophysics of the high-voltages in 1930's – 2010's. In this work the Kharkiv scientific schools in this field were identified for the first time. They are: the scientific school of the high-voltage accelerators in the UFTI headed by academician of USSR A.K. Walter; the scientific school of the technique of high-voltages in the KhPI, the founder of which was the acacademician of the Academy of Sciences of USSR V. M. Khrushchev; the scientific school of magnetic-pulse treatment of metals in KhPI which was founded by professor I. V. Belii. A holistic scientific-historical analysis of the process of technical solutions in electrophysics and the creation of high-voltage installations in leading scientific centers of Kharkiv is carried out in this work. The importance and uniqueness of the high-voltage installations is shown here. The importance and the uniqueness of the high-voltage structures, the conditions of their creation usage in home industry and science are shown here.
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8

Веселова, Надія Вікторівна. "Становлення і розвиток харківських наукових шкіл у галузі техніки та електрофізика високих напруг (1930–2010 рр.)". Thesis, НТУ "ХПІ", 2015. http://repository.kpi.kharkov.ua/handle/KhPI-Press/17176.

Повний текст джерела
Анотація:
Дисертація на здобуття наукового ступеня кандидата історичних наук за спеціальністю 07.00.07 – історія науки і техніки. – Національний технічний університет "Харківський політехнічний інститут". – Харків, 2015. У дисертації комплексно досліджується створення та розвиток харківських наукових шкіл у галузі техніки та електрофізики високих напруг у 1930–2010 рр. В роботі визначені харківські наукові школи в цій галузі, а саме: наукова школа високовольтних прискорювачів в УФТІ, яку очолив академік АН УРСР А. К. Вальтер; наукова школа техніки високих напруг ХПІ, засновником якої став академік АН УРСР В. М. Хрущов; наукова школа магнітно-імпульсної обробки металів ХПІ, що була заснована проф. І. В. Білим. Проведено цілісний науково-історичний аналіз процесу виникнення технічних рішень в електрофізиці і створення установок високої напруги в провідних харківських наукових центрах. Розкрито процес формування складу наукових установ і лабораторій, внесок окремих вчених у розвиток техніки і електрофізики високих напруг в м. Харкові. Показана важливість та унікальність створених високовольтних установок, визначено передумови їх створення та досліджено застосування цих пристроїв у вітчизняній науці та промисловості.
The thesis for the competition of the academic degree of the candidate of the historical sciences, the speciality 07.00.07 – The history of science and technique. – National Technical University "Kharkiv Polytechnic Institute". – Kharkiv, 2015. The thesis is devoted to the complex research of the establishment and the development of Kharkiv scientific schools in the field of the technique and the electrophysics of the high-voltages in 1930's – 2010's. In this work the Kharkiv scientific schools in this field were identified for the first time. They are: the scientific school of the high-voltage accelerators in the UFTI headed by academician of USSR A.K. Walter; the scientific school of the technique of high-voltages in the KhPI, the founder of which was the acacademician of the Academy of Sciences of USSR V. M. Khrushchev; the scientific school of magnetic-pulse treatment of metals in KhPI which was founded by professor I. V. Belii. A holistic scientific-historical analysis of the process of technical solutions in electrophysics and the creation of high-voltage installations in leading scientific centers of Kharkiv is carried out in this work. The importance and uniqueness of the high-voltage installations is shown here. The importance and the uniqueness of the high-voltage structures, the conditions of their creation usage in home industry and science are shown here.
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Chazottes-Leconte, Aurélien. "Conception et fabrication d'un dispositif de mise en compression par impulsions électro magnétiques (EMP)." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1082.

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Les procédés de traitement de surface sont utilisés à l'échelle industrielle pour améliorer les performances de pièces mécaniques en introduisant des contraintes résiduelles de compression. Cette mise en compression de surface permet de limiter l'amorçage et la propagation de fissures dans le matériau. Ceci permet d'augmenter de façon significative la durée de vie en fatigue des pièces mécaniques ainsi traitées. L'utilisation de ces procédés dans l'industrie a démontré leur efficacité, mais aussi leurs limitations et inconvénients. Les défauts récurrents consistent en une profondeur traitée faible, une dégradation de l'état de surface (rugosité), des difficultés de contrôle, une contamination du matériau traité, etc. Ces défauts ont conduit à l'élaboration de nouveaux procédés innovants qui permettent de meilleures performances en évitant certains des inconvénients succinctement évoqués. Parmi ces procédés innovants, le traitement de surface par impulsion électromagnétique semble particulièrement intéressant. Ce procédé met en œuvre un puissant champ magnétique transitoire pour engendrer des forces de Laplace dans une pièce métallique et induire des contraintes résiduelles. Il n'existe que peu d'informations dans la littérature et il n'existe aucun dispositif expérimental de ce procédé. Cette thèse est dédiée à la conception et la réalisation d'un prototype de mise en compression électromagnétique. Le premier chapitre de cette thèse est un état de l'art des technologies de mise en compression et du procédé de mise en compression par impulsion électromagnétique. Ainsi, les besoins de ce procédé sont identifiés et les technologies pouvant répondre à ces besoins sont explorées. Le deuxième chapitre, après une sélection de la structure globale du dispositif, va consister aux dimensionnements des éléments du prototype EMP. Cette étude commencera avec une étude sur l'inducteur qui va être utilisé avant de continuer sur le dimensionnement du stockage d'énergie et de l'interrupteur de décharge. Afin de valider le dimensionnement des composants précédents, une simulation électromagnétique 3D du système est réalisée. L'assemblage du prototype est présenté dans le troisième chapitre ainsi qu'une première campagne d'essai sur un alliage d'aluminium. Deux types d'éprouvettes sont testées : une éprouvette fine pour vérifier visuellement la mise en compression (essai Almen) et une éprouvette massive afin d'évaluer la profondeur traitée. Une modélisation multiphysique 3D du procédé est réalisée afin de corréler ces résultats avec l'expérience. Dans un dernier chapitre, une étude exploratoire est menée sur un matériau ferromagnétique, le mumétal, pour visualiser l'influence des contraintes résiduelles sur les propriétés magnétiques de ce dernier
Penning processes are widely used in industries to apply compressive residual stresses into the most solicited part of mechanical pieces. In that way, the compressive residual stresses limit the priming and the propagation of micro-cracks in the material. This increases significantly the lifespan of the treated mechanical piece under fatigue stresses. These existing peening processes have proved their efficiency and also their limitations and weaknesses. The main recurrent defaults are a shallow depth of treatment, a degradation of the surface condition, a random control of the treatment, a material contamination, etc. These problems have led towards the development of news innovative peening processes which allow better performance avoiding some previous defaults briefly evoked. Among these news processes, the electromagnetic peening process seems especially interesting. This process uses high energy electromagnetic fields to induce Lorentz forces into a metallic piece and thus residual stresses. Actually, there is not much information about this process in the literature and no prototype was ever built. The work of this thesis is dedicated to development and realization of an electromagnetic peening prototype. The first chapter of this thesis adresses the state of the art of major peening processes actually in industrial use. Next, the electromagnetic peening process, or EMP process, is described and the electrical needs are exposed. A second state of the art is made about the technological solutions to respond to the EMP needs. The second chapter is about the conception of the EMP prototype with the electrical structure adopted in the previous chapter. The first step is about the inductor sizing to generate an electromagnetic field sufficient enough for a peening application. Next, the storage system is designed depending on the inductor parameters and finally the closing switch is created considering the electrical parameters used for the EMP process. To validate the previous results, a 3D electromagnetic simulation is done. The prototype assembly is presented in the third chapter and also the first experimental test on the EMP prototype. To begin with, an aluminium alloy with low yield strength is selected to be treated. Two different samples forms are used, a thin one, to realize a similar test to the Almen test and thick one to check the EMP depth of treatment. A 3D multiphysics simulation of these experiments is made and these numeric results are next correlated to the experimental ones. In the fourth chapter, an exploratory study is realized on the effects of the residual stresses on magnetic properties of ferromagnetic material, the mumetal
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10

Katic, Janko. "Highly-Efficient Energy Harvesting Interfaces for Implantable Biosensors." Doctoral thesis, KTH, Integrerade komponenter och kretsar, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-206588.

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Energy harvesting is identified as an alternative solution for powering implantable biosensors. It can potentially enable the development of self-powered implants if the harvested energy is properly handled. This development implies that batteries, which impose many limitations, are replaced by miniature harvesting devices. Customized interface circuits are necessary to correct for differences in the voltage and power levels provided by harvesting devices from one side, and required by biosensor circuits from another. This thesis investigates the available harvesting sources within the human body, proposes various methods and techniques for designing power-efficient interfaces, and presents two CMOS implementations of such interfaces. Based on the investigation of suitable sources, this thesis focuses on glucose biofuel cells and thermoelectric harvesters, which provide appropriate performance in terms of power density and lifetime. In order to maximize the efficiency of the power transfer, this thesis undertakes the following steps. First, it performs a detailed analysis of all potential losses within the converter. Second, in relation to the performed analysis, it proposes a design methodology that aims to minimize the sum of losses and the power consumption of the control circuit. Finally, it presents multiple design techniques to further improve the overall efficiency. The combination of the proposed methods and techniques are validated by two highly efficient energy harvesting interfaces. The first implementation, a thermoelectric energy harvesting interface, is based on a single-inductor dual-output boost converter. The measurement results show that it achieves a peak efficiency of 86.6% at 30 μW. The second implementation combines the energy from two sources, glucose biofuel cell and thermoelectric harvester, to accomplish reliable multi-source harvesting. The measurements show that it achieves a peak efficiency of 89.5% when the combined input power is 66 μW.
Energiskörd har identifierats som en alternativ lösning för att driva inplanterbara biosensorer. Det kan potentiellt möjliggöra utveckling av själv-drivna inplanterbara biosensorer. Denna utveckling innebär att batterier, som sätter många begränsningar, ersätts av miniatyriserade energiskördsenheter. Anpassade gränssnittskretsar är nödvändiga för att korrigera för de skillnader i spänning och effektnivå som produceras av de energialstrande enheterna, och de som krävs av biosensorkretsarna. Denna avhandling undersöker de tillgängliga källorna för energiskörd i den mänskliga kroppen, föreslår olika metoder och tekniker för att utforma effektsnåla gränssnitt och presenterar två CMOS-implementeringar av sådana gränssnitt. Baserat på undersökningen av lämpliga energiskördskällor, fokuserar denna avhandling på glukosbiobränsleceller och termoelektriska energiskördare, som har lämpliga prestanda i termer av effektdensitet och livstid. För att maximera effektiviteten hos effektöverföringen innehåller denna avhandling följande steg. Först görs en detaljerad analys av alla potentiella förluster inom boost-omvandlare. Sedan föreslår denna avhandling en designmetodik som syftar till att maximera den totala effektiviteten och effektförbrukningen. Slutligen presenterar den flera designtekniker för att ytterligare förbättra den totala effektiviteten. Kombinationen av de föreslagna metoderna och teknikerna är varierade genom två högeffektiva lågeffekts energigränssnittskretsar. Den första inplementeringen är ett termoelektriskt energiskördsgränssnitt baserat på en induktor, med dubbla utgångsomvandlare. Mätresultaten visar att omvandlaren uppnår en maximal effektivitet av 86.6% vid 30 μW. Det andra genomförandet kombinerar energin från två källor, en glukosbiobränslecell och en termoskördare, för att åstadkomma en tillförlitlig multi-källas energiskördslösning. Mätresultaten visar att omvandlaren uppnår en maximal effektivitet av 89.5% när den kombinerade ineffekten är 66 μW.

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Книги з теми "Voltage generator and current generator"

1

Tanzawa, Toru. On-chip High-Voltage Generator Design. New York, NY: Springer New York, 2013.

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Tanzawa, Toru. On-chip high-voltage generator design. New York: Springer, 2013.

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3

Tanzawa, Toru. On-chip High-Voltage Generator Design. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21975-2.

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4

Tanzawa, Toru. On-chip High-Voltage Generator Design. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-3849-6.

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5

Zuev, Sergey, Ruslan Maleev, and Aleksandr Chernov. Energy efficiency of electrical equipment systems of autonomous objects. ru: INFRA-M Academic Publishing LLC., 2021. http://dx.doi.org/10.12737/1740252.

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When considering the main trends in the development of modern autonomous objects (aircraft, combat vehicles, motor vehicles, floating vehicles, agricultural machines, etc.) in recent decades, two key areas can be identified. The first direction is associated with the improvement of traditional designs of autonomous objects (AO) with an internal combustion engine (ICE) or a gas turbine engine (GTD). The second direction is connected with the creation of new types of joint-stock companies, namely electric joint-stock companies( EAO), joint-stock companies with combined power plants (AOKEU). The energy efficiency is largely determined by the power of the generator set and the battery, which is given to the electrical network in various driving modes. Most of the existing methods for calculating power supply systems use the average values of disturbing factors (generator speed, current of electric energy consumers, voltage in the on-board network) when choosing the characteristics of the generator set and the battery. At the same time, it is obvious that when operating a motor vehicle, these parameters change depending on the driving mode. Modern methods of selecting the main parameters and characteristics of the power supply system do not provide for modeling its interaction with the power unit start-up system of a motor vehicle in operation due to the lack of a systematic approach. The choice of a generator set and a battery, as well as the concept of the synthesis of the power supply system is a problem studied in the monograph. For all those interested in electrical engineering and electronics.
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6

Shokrollah-Timorabadi, Hamid. Voltage source inverter for voltage and frequency control of a stand-alone self-excited induction generator. Ottawa: National Library of Canada, 1998.

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7

Institute Of Electrical and Electronics Engineers. IEEE guide for synchronous generator modeling practices in stability analyses. New York, NY, USA: Institute of Electrical and Electronics Engineers, 1991.

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8

Dodd, C. V. Improved eddy-current inspection for steam generator tubing progress report for period January 1985 to December 1987. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1990.

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9

Dodd, C. V. Improved eddy-current inspection for steam generator tubing progress report for period January 1985 to December 1987. Washington, DC: Division of Engineering, Office of Nuclear Regulatory Research, U.S. Nuclear Regulatory Commission, 1990.

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10

IEEE Power Engineering Society. Switchgear Committee. and IEEE Standards Board, eds. IEEE standard for AC high-voltage generator circuit breakers rated on a symmetrical current. New York, N.Y: The Institute of Electrical and Electronics Engineers, 1997.

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Частини книг з теми "Voltage generator and current generator"

1

Popa, Cosmin. "Superior-Order Curvature-Corrected Voltage Reference Using a Current Generator." In Artificial Neural Networks – ICANN 2010, 12–21. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-15819-3_2.

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2

Amit Bhattacharyya. "Differential Voltage Current Conveyor-Based One-Shot Pulse Generator Circuit Implementation." In Proceeding of International Conference on Intelligent Communication, Control and Devices, 1–7. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1708-7_1.

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3

Coeur, F., Y. Arnal, J. Pelletier, O. Lesaint, O. Maulat, and M. Roche. "Monoatomic Ion Rich DECR Plasmas for Ion Implantation by Plasma Immersion Using a New High Voltage — High Current Pulse Generator." In Advanced Technologies Based on Wave and Beam Generated Plasmas, 493–94. Dordrecht: Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-0633-9_32.

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4

Abu-Siada, Ahmed, Mohammad A. S. Masoum, Yasser Alharbi, Farhad Shahnia, and A. M. Shiddiq Yunus. "Superconducting Magnetic Energy Storage, a Promising FACTS Device for Wind Energy Conversion Systems." In Recent Advances in Renewable Energy, 49–86. UAE: Bentham Science Publishers Ltd., 2017. http://dx.doi.org/10.2174/9781681085425117020004.

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The applications of FACTS devices have become popular in the last few decades. There are many types of FACTS devices that are currently used in power systems to improve system stability, power quality and the overall reliability of the power systems. Since the involvement of renewable energies based power plants such as wind and PV, problems related to power system stability and quality has become even more complex, therefore the deployment of FACTS devices has become a challenging task. In this chapter, a Superconducting Magnetic Energy Storage (SMES) Unit is applied to improve the performance of Doubly Fed Induction Generator (DFIG) based wind turbine during various disturbances such as voltage sag, short circuit faults and load variation, including problems related to internal faults within the DFIG converters.
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5

Schenk, Michael. "The Greinacher high-voltage generator." In Studies with a Liquid Argon Time Projection Chamber, 67–84. Wiesbaden: Springer Fachmedien Wiesbaden, 2015. http://dx.doi.org/10.1007/978-3-658-09430-0_4.

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6

Ren, Gu, and Xiao Xiangning. "High-Power Controllable Voltage Quality Disturbance Generator." In Lecture Notes in Electrical Engineering, 587–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21697-8_74.

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7

Tanzawa, Toru. "System Overview and Key Design Considerations." In On-chip High-Voltage Generator Design, 1–14. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3849-6_1.

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8

Tanzawa, Toru. "Charge Pump Circuit Theory." In On-chip High-Voltage Generator Design, 15–95. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3849-6_2.

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Tanzawa, Toru. "Charge Pump State of the Art." In On-chip High-Voltage Generator Design, 97–114. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3849-6_3.

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10

Tanzawa, Toru. "Pump Control Circuits." In On-chip High-Voltage Generator Design, 115–54. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3849-6_4.

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Тези доповідей конференцій з теми "Voltage generator and current generator"

1

Grawer, G., F. Cordobes Dominguez, T. Fowler, and N. Voumard. "A 400A programmable linear current pulse generator." In 2016 IEEE International Power Modulator and High Voltage Conference (IPMHVC). IEEE, 2016. http://dx.doi.org/10.1109/ipmhvc.2016.8012874.

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Rehman, M. Z., J. Hallstrom, and J. Havunen. "Current Step Generation and Measurement with Nanosecond Rise Time using Coaxial Cable Generator." In 2018 IEEE International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2018. http://dx.doi.org/10.1109/ichve.2018.8642188.

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3

Haryono, T., K. T. Sirait, Tumiran, and Hamsah Berahim. "The Design of A High Amplitude Impulse Current Generator." In 2008 International Conference on High Voltage Engineering and Application (ICHVE). IEEE, 2008. http://dx.doi.org/10.1109/ichve.2008.4773942.

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4

Lundin, Staffan, Ma˚rten Grabbe, Katarina Yuen, and Mats Leijon. "A Design Study of Marine Current Turbine-Generator Combinations." In ASME 2009 28th International Conference on Ocean, Offshore and Arctic Engineering. ASMEDC, 2009. http://dx.doi.org/10.1115/omae2009-79350.

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Marine currents are an offshore source of renewable energy of increasing importance, with the development of technology for electricity generation from tidal currents or low-head river currents advancing at a quick pace. Two of the major components of a marine current power plant are the generator and the turbine. It is not sufficient to design these components separately, but a system approach, where the power plant is seen as one entity, must be taken to achieve best overall efficiency. In the present paper, the performance of three different combinations of direct-driven permanent magnet generator with cross-stream axis marine current turbine is examined numerically under the variation of water flow speed. The design case chosen is that of a shallow river or tidal channel, where the cross-sectional area limits the physical size of the power plant. The units are designed for a power output of 10 kW at a water current velocity of 1 m/s. Turbines for three different rotational speeds are considered, each in combination with a corresponding generator. The three turbine-generator systems are designed according to similar design criteria to allow for comparisons. The turbines are modelled using an in-house code, based on the double multiple streamtube model. Corrections are made due to the finite aspect ratio and tip losses of the blades. Experimental data for the lift and drag coefficients for different Reynolds numbers are used in the model. The generators are modelled using a FEM tool that has been validated with experimental results. The three generators are designed for the same nominal voltage and with a low load angle to allow for overload operation. The overall performance of each of the three systems is studied under varying flow velocity. The main conclusion is that all three machines exhibit essentially the same performance behaviour, which means that the choice of nominal operational speed for a power plant will not be a major design constraint. Turbines with higher rotational speed allow for a more compact generator design within the limits of the design parameters used in this study. However, this also entails certain mechanical constraints on the turbine. Due to the restricted cross-sectional area in the channel, it is clear that at least one of the three systems would have to be placed with the axis of rotation in a horizontal rather than vertical position.
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5

El Kholy, Muhammad M. "Low noise low voltage sub bandgap reference voltage with PTAT current generator." In 2009 4th International Design and Test Workshop (IDT 2009). IEEE, 2009. http://dx.doi.org/10.1109/idt.2009.5404101.

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6

Patil, Apeksha N., Sachin Angadi, and A. B. Raju. "Voltage control of PWM-VSI Assisted Standalone Self Excited Induction Generator." In 2018 International Conference on Current Trends towards Converging Technologies (ICCTCT). IEEE, 2018. http://dx.doi.org/10.1109/icctct.2018.8550943.

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Pinto, Marcus Vinicius Viegas, Regis Pinheiro Landim, and Rodrigo Pereira David. "Evaluation of a voltage ramp generator for low current calibration." In 2021 IEEE International Instrumentation and Measurement Technology Conference (I2MTC). IEEE, 2021. http://dx.doi.org/10.1109/i2mtc50364.2021.9460045.

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Nazarova, Natalia, and Dmitriy Vinnichenko. "Electrotechnical control and current protection system of the high-voltage pulse-current generator." In 2017 IEEE First Ukraine Conference on Electrical and Computer Engineering (UKRCON). IEEE, 2017. http://dx.doi.org/10.1109/ukrcon.2017.8100307.

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Gang, Liu, Zeng Han, Lee Li, Lin Fu-chang, Hu Guan, Liu Ning, Cai Li, and Zhou Zheng-yang. "Research on ground potential of Marx generator in large current switch system." In 2010 IEEE International Power Modulator and High Voltage Conference (IPMHVC). IEEE, 2010. http://dx.doi.org/10.1109/ipmhvc.2010.5958421.

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Shi, Haozheng, Jian Qiu, Weigang Dong, and Kefu Liu. "Design of inductive pulsed current generator based on solid-state Marx adder." In 2016 IEEE International Power Modulator and High Voltage Conference (IPMHVC). IEEE, 2016. http://dx.doi.org/10.1109/ipmhvc.2016.8012830.

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Звіти організацій з теми "Voltage generator and current generator"

1

Burkhart, S. C. Voltage controlled MESFET pulse shape generator. Office of Scientific and Technical Information (OSTI), October 1994. http://dx.doi.org/10.2172/61208.

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O'Sullivan, G. A. Ocean Current Power Generator. Final Report. Office of Scientific and Technical Information (OSTI), July 2002. http://dx.doi.org/10.2172/824331.

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Zhao, Y. The waveform analysis for Zarem type high voltage pulse generator. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/188614.

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4

Rader, Mark S., Carol Sullivan, and Tim D. Andreadis. Experimental Observation of RF Radiation Generated by an Explosively Driven Voltage Generator. Fort Belvoir, VA: Defense Technical Information Center, August 2005. http://dx.doi.org/10.21236/ada438014.

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5

Chang, F. C., S. Bakhtiari, and D. Kupperman. Modeling of eddy current NDE probe for steam generator tubes. Office of Scientific and Technical Information (OSTI), January 2003. http://dx.doi.org/10.2172/808427.

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6

Bakhtiari, S., and D. S. Kupperman. Modeling of eddy current probe response for steam generator tubes. Office of Scientific and Technical Information (OSTI), December 1996. http://dx.doi.org/10.2172/414381.

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7

Lipo, Thomas A., and Velimir Nedic. Induced Voltage Self-Excitation for a Switched-Reluctance Generator. Experimental Verification of Concept. Fort Belvoir, VA: Defense Technical Information Center, March 2000. http://dx.doi.org/10.21236/ada381428.

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8

Zhao, Yongxiang, and Hai-peng Wang. A high voltage pulse generator for the mod-anode of the cluster klystron. Office of Scientific and Technical Information (OSTI), October 1995. http://dx.doi.org/10.2172/183209.

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9

Kurtz, R. J., P. G. Heasler, and C. M. Anderson. Performance demonstration tests for eddy current inspection of steam generator tubing. Office of Scientific and Technical Information (OSTI), May 1996. http://dx.doi.org/10.2172/257304.

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10

Boscolo, I., and J. Gong. Powerful electrostatic FEL: Regime of operation, recovery of the spent electron beam and high voltage generator. Office of Scientific and Technical Information (OSTI), February 1995. http://dx.doi.org/10.2172/88784.

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