Relevant bibliographies by topics / Frequency convertor

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Frequency convertor'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Frequency convertor"

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Cheng, K. W. E., and P. D. Evans. "Constant frequency, two-stage quasiresonant convertor." IEE Proceedings B Electric Power Applications 139, no. 3 (1992): 227. http://dx.doi.org/10.1049/ip-b.1992.0027.

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Chau, K. T. "New constant-frequency multiresonant boost convertor." Electronics Letters 30, no. 2 (January 20, 1994): 101–2. http://dx.doi.org/10.1049/el:19940076.

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Smith, I. R., J. G. Kettleborough, and T. C. Kok. "Brushless and current-compounded frequency-convertor exciter." IEE Proceedings B Electric Power Applications 133, no. 1 (1986): 7. http://dx.doi.org/10.1049/ip-b.1986.0002.

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

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Reynolds, J. S. "Frequency/voltage convertor with low output ripple." Electronics Letters 22, no. 15 (1986): 783. http://dx.doi.org/10.1049/el:19860537.

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Kipnis, I., and A. P. S. Khanna. "10 GHz frequency-convertor silicon bipolar MMIC." Electronics Letters 22, no. 23 (1986): 1270. http://dx.doi.org/10.1049/el:19860870.

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

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Power Electronics is widely used in bioscience and medical instruments such as Electrosurgical Units, MRI and X-ray. An advance development in switch mode power supply leads to a new design topology of DC to DC convertor for Electrosurgical Systems. The new designed system has a capacity to produce high efficient output power with high resonance, this improves the performance of the surgery operation. This paper reports a Buck-Boost topology DC to DC (Flyback) converter with high power switching. The simulation results show an improved performance when compared to the existing system.
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Watson, D. B. "Circuit Representation of Three-Phase Bridge Convertors." International Journal of Electrical Engineering & Education 25, no. 4 (October 1988): 351–60. http://dx.doi.org/10.1177/002072098802500413.

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The paper shows that the three-phase bridge convertor can be represented in the steady state by a circuit model. Circuit models are deduced for naturally commutated and forced commutated convertors. Steady state power rectification, inversion, the d.c. link, and variable frequency motor control are described.
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Kiranon, W., P. Wardkein, and C. Loescharataramdee. "Simple frequency/voltage convertor with low output ripple." Electronics Letters 27, no. 3 (1991): 205. http://dx.doi.org/10.1049/el:19910133.

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Wood, A. R. "HVDC convertor waveform distortion: a frequency-domain analysis." IEE Proceedings - Generation, Transmission and Distribution 142, no. 1 (1995): 88. http://dx.doi.org/10.1049/ip-gtd:19951501.

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Dissertations / Theses on the topic "Frequency convertor"

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Watson, N. R. "Frequency-dependent A.C. system equivalents for harmonic studies and transient convertor simulation." Thesis, University of Canterbury. Electrical Engineering, 1987. http://hdl.handle.net/10092/6055.

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This thesis describes the algorithms developed for synthesizing frequency matched a.c. system equivalents for use with a Transient Convertor Simulator program. Two synthesis methods are outlined, with the merits of each being illustrated by applying them to the lower South Island portion of New Zealand's primary transmission system. Validation of the diakoptical technique used to model the frequency dependent mutual coupling, as well as data preparation, is achieved by using the current source model to inject harmonic currents into the frequency-matched a.c. system equivalent. The need for frequency matched a.c. system equivalents is demonstrated by using the Transient Convertor Simulator program for harmonic penetration studies. Finally the effect of the frequency-dependence of an a.c. system model on the transient behaviour of a convertor is illustrated by simulating both a.c. and d.c. disturbances. The difference in transient behaviour with asymmetric a.c. faults as well as the harmonic assessment for harmonic penetration studies both demonstrate the need for frequency matched a.c. system equivalents that more accurately model the actual system.
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Tigga, Celine. "Modelling of Measurement Equipment for High Frequency Electromagnetic Fields." Thesis, Högskolan i Gävle, Avdelningen för elektronik, matematik och naturvetenskap, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-18894.

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The aim of this thesis was to develop a model of a receiver which could be quickly used to analyze radiated interference levels from data captured at the output of the antenna equipment used to measure radiated energy. Active circuits were mainly used in developing this model for the ease with which the design and simulations could be carried out in OrCAD. The guiding document for the thesis work has been CISPR 16-1-1 (International Special Committee on Radio Interference part 16-1-1) which specifies the characteristics and performance of equipment for the measurement of radiated interference. The testing of this receiver model was carried out as far as possible based on the test setups recommended in CISPR, and all results have been compared with the standards laid down for the model. Using the results, it will be shown that a CISPR EMI receiver can be modeled as a simple EMI receiver consisting of filtering, mixing and detecting circuits built according to specifications.
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Wood, Alan R. "An analysis of non-ideal HVDC convertor behaviour in the frequency domain, and a new control proposal." Thesis, University of Canterbury. Electrical Engineering, 1993. http://hdl.handle.net/10092/5740.

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This thesis describes a linear and direct method of analysing the interaction of waveform distortion around an HVdc convertor. Existing analysis techniques are reviewed, and their strengths and weaknesses outlined. Both time domain simulation and iterative harmonic domain solutions are potentially very accurate. However, the lack of insight they provide into the important mechanisms of waveform distortion interaction, coupled with the computational expense (time domain), or limitation to steady state integer harmonics (harmonic domain), are considerable shortcomings. The frequency domain transfer function approach is chosen, and extended to cover the most important mechanisms of frequency transfer. The developed approach is used first to consider the convertor in isolation, secondly to consider the convertor coupled with either the ac system or the dc system impedance, and finally the convertor embedded within both an ac and dc system. In this way the importance of the different mechanisms of distortion transfer through a convertor are established, the frequency dependent impedance of a convertor is developed, and a description of waveform distortion dynamics around a convertor with realistic ac and dc conditions is achieved. A new indicator, the Saturation Stability Factor, is used to describe the dynamics of transformer core saturation instability. The linearised frequency domain convertor model is demonstrated to have useful accuracy, and with its ease and speed of use should prove a useful complement to existing analysis techniques. Finally, a new control system structure for back -to-back HVdc links is proposed, fully utilising the proximity of the rectifier and inverter. The proposed control system lends itself to a number of strategies, and two new criteria are developed for their evaluation.
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Blanc-Russac, Jean-Marie. "Conversion statique de frequence par le moyen de dispositifs magnetiques." Paris 6, 1987. http://www.theses.fr/1987PA066270.

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Etude de la ferroresonance en regime de saturation en vue de l'obtension d'un spectre harmonique riche. Application aux circuits d'allumage pour lampes a decharge. Realisation de circuits selecteurs d'harmonique
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Svoboda, Josef. "Přímý číslicový frekvenční syntezátor." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2009. http://www.nusl.cz/ntk/nusl-217986.

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Direct Digital Frequency Synthesis (DDFS) is a method of producing an analog waveform, usually a sine wave, by generating a time varying signal in digital form a then performing a digital to analog conversion. Because operations within a DDFS device are primarily digital, it can offer fast switching between output frequencies, fine frequency resolution and operation over a broad spectrum of frequencies.
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David, Alain. "Insensibilisation des convertisseurs de fréquence aux creux et coupures de tension." Cachan, Ecole normale supérieure, 1993. http://www.theses.fr/1993DENS0009.

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Les convertisseurs de fréquence pour machine asynchrone sont en fort développement depuis une dizaine d'années. Cette structure s'avère cependant très sensible aux creux et coupures brèves de tension du réseau d'alimentation. Ces perturbations peuvent occasionner une perte de contrôle du convertisseur, entrainant, le plus souvent, un arrêt total du système, avec un redémarrage rarement automatique de l'équipement au retour de l'alimentation. Ces arrêts impromptus sont problématiques et couteux pour beaucoup d'applications industrielles. De nouvelles stratégies de commande du convertisseur pour palier à ce problème sont proposées dans cette thèse. Un modèle de l'ensemble convertisseur de fréquence-machine asynchrone est développé en régime transitoire en supposant une tension d'alimentation quelconque. Les effets des perturbations réseau sur le système sont ensuite étudies. Plusieurs techniques d'insensibilisation sont ensuite proposées: a) une régulation du système pour compenser les effets des creux de tension, b) une identification de la vitesse de la machine en roue libre (nécessaire pour un rattrapage au vol après une coupure brève triphasée), c) une technique de rattrapage au vol basée sur une synchronisation du convertisseur sur les tensions résiduelles générées par le flux rémanent de la machine, d) une régulation a glissement nul assurant le maintien du synchronisme entre le convertisseur et la machine lors de coupures brèves triphasées. Ces techniques ont été validées sur simulations numériques et sur un banc d'essais de 7. 5 kw, avec des performances satisfaisantes: contrôle permanent du système, minimisation des chutes de vitesse, redémarrage automatique du système au retour de la tension normale sans surcourant ou à-coup de couple. L'ensemble des résultats et les performances des commandes sont étudies d'un point de vue théorique sur la base du modèle développé
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Li, Jian Ming. "Evaluation des possibilités fréquentielles des transistors bipolaires de puissance haute tension." Grenoble INPG, 1989. http://www.theses.fr/1989INPG0049.

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Cette étude vise les possibilités d'utilisation des T. B. P. H. T. Dans les convertisseurs à résonance à des fréquences de quelques centaines de kHz et des puissances de quelques dizaines de kw. Pour atteindre cet objectif, une modélisation analytique uni-dimensionnelle du semi-conducteur est proposée: elle permet d'obtenir les caractéristiques de la commande de base aux fréquences correspondantes et d'analyser les performances fréquentielles des circuits de base aux fréquences correspondantes et d'analyser les performances fréquentielles des circuits de base classiques. Les synthèses de commande et les interrupteurs du type “CASCODE” sont représentés. Deux convertisseurs à résonance réalisés, un onduleur de tension 200 kHz-10 kW et un onduleur de courant 100 kHz-20 kW montrent la faisabilité de l'objectif en optimisant la commande des T. B. P. H. T
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Dufernez, Bruno. "Étude et simulation numérique d'un cycloconvertisseur à commande entièrement numérique." Vandoeuvre-les-Nancy, INPL, 1992. http://www.theses.fr/1992INPL133N.

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Le travail présenté dans cette thèse a été réalisé au sein du groupe de recherches en électrotechnique et électronique de Nancy, en collaboration avec le centre de recherche en automatique de Nancy. Il s'agit d'une étude sur les cycloconvertisseurs et plus particulièrement sur la réalisation de la commande d'un cycloconvertisseur triphasé à 36 thyristors, entièrement numérique, sans courant de circulation et sans liaison de neutre. Cette commande numérique est basée sur un générateur d'impulsions de type allumeur à retard. L'étude a été réalisée principalement par simulation numérique. Le programme de simulation a été réalisé avec GASPE (générateur automatique de programme de simulation des procédés électromécaniques), en utilisant une méthode de modélisation permettant de prendre en compte toutes les topologies du convertisseur, en particulier les commutations avec empiétement. La comparaison entre les différentes stratégies de commande s'appuie sur l'observation des formes d'ondes et des taux d'harmoniques. L'ébauche d'une réalisation pratique d'un cycloconvertisseur monophasé, sans courant de circulation et entièrement numérique est aussi présentée
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Kantzon, David. "PFC-design for frequency converter." Thesis, Linköpings universitet, Fysik och elektroteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-124547.

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This thesis deals with power factor correction for three-phase systems. A boost-buck topology was described, modeled and then simulated in MATLAB/Simulink. The simulation results show that the system provides a power factor over 99% over the tested power output range. Moreover, the harmonic injection concept was introduced which reduces the total harmonic distortion to 8.72% at full output power. A prototype system was also built using an FPGA for the control system. The prototype did not provide the performance seen in simulation but showed that the method is valid and does provide a higher power factor when used.
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Amaral, Heberty Huilton. "Conversor Boost ZCZVT aplicado em um sistema de iluminação de emergência com LED." Universidade Tecnológica Federal do Paraná, 2011. http://repositorio.utfpr.edu.br/jspui/handle/1/223.

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Fundação Araucária
Neste trabalho foi realizado um estudo sobre um sistema de iluminação de emergência não permanente. Este sistema é constituído de baterias, conversor boost e o LED de potência. O foco do trabalho é analisar o conversor boost, que emprega duas técnicas de comutação, sendo elas: comutação dissipativa e comutação suave. As análises feitas no conversor são referentes a comutação da chave semicondutora principal ocorrer de forma dissipativa ou suave para a técnica de comutação dissipativa e verificar se para a comutação suave as chaves semicondutoras (principal e auxiliar) comutam de forma dissipativa ou suave. Outro fato importante é avaliar o rendimento do conversor boost para as duas técnicas de comutação. Ainda é averiguada a autonomia do sistema de iluminação de emergência e também se ele está em conformidade com que cita a norma IEEE 446, referente a autonomia do sistema. Por fim é apresentada as formas de onda da corrente fornecida ao LED. Em suma, o conversor que emprega a técnica de comutação dissipativa demonstrou que a comutação ocorre de forma dissipativa, já para a técnica de comutação suave, a comutação transcorreu de forma suave. A eficiência do conversor mensurada através da autonomia do sistema de iluminação de emergência comprovou que a comutação suave apresenta maior eficiência do que a comutação dissipativa, em torno de 34%, devido a redução das perdas no chaveamento. Foi relatado que o conversor com a técnica de comutação suave empregado no sistema de iluminação de emergência obteve uma autonomia de uma hora e quatro minutos, já o conversor que utiliza a técnica de comutação dissipativa obteve uma autonomia de quarenta e dois minutos. Portanto, os sistemas de iluminação de emergência, no qual o conversor boost faz uso das duas técnicas de comutação estão em conformidade com a norma IEEE- Std 446. Em análise última observou-se que a corrente fornecida ao LED proveniente de um conversor com comutação suave possui uma ondulação em torno de 35% menor que a corrente oriunda de um conversor com comutação dissipativa e, ainda não possui oscilação do nível de corrente, tais características elevam a vida útil do LED e não alteram as características fotométricas do LED.
In this paper we present a study of an emergency lighting system is not permanent. This system consists of batteries, LED boost converter and power. The focus of the paper is to analyze the boost converter, which employs two switching techniques, which are: hard switching and soft switching. The analysis made in the converter are related to the commutation of the main semiconductor switch occur hard or soft switching technique for hard and check for soft switching the switches (main and auxiliary) switch in a hard or soft. Another important fact is to evaluate the performance of the boost converter for the two switching techniques. Also investigated is the autonomy of the emergency lighting system and also if he is quoting in accordance with IEEE 446, regarding the autonomy of the system. Finally is shown the waveform of the current supplied to the LED. In short, the converter that employs the technique of switched hard demonstrated that switching occurs in a hard, since the techniques of soft switching, the switch went soft. The measured efficiency of the converter through the autonomy of the emergency lighting system has proven that soft switching is more efficient than the hard switching, around 34% due to reduction in switching losses. It was reported that the converter with soft switching technique used in emergency lighting system achieved an endurance of one hour and four minutes, as the converter using the switching technique obtained a hard range of forty-two minutes. Therefore, emergency lighting systems, in which the boost converter makes use of two switching techniques are in accordance with IEEE Std-446. In ultimate analysis it was observed that the current supplied to the LED from a converter with soft switching has a ripple around 35% lower than the current coming from a switching converter with hard and does not have oscillation current level, such features increase the lifetime of the LED and do not alter the photometric characteristics of the LED.
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Books on the topic "Frequency convertor"

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Azcona Murillo, Cristina, Belén Calvo Lopez, and Santiago Celma Pueyo. Voltage-to-Frequency Converters. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6237-8.

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Converter and filter circuits. Boston: Newnes, 1996.

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Simplified design of voltage-frequency converters. Boston: Newnes, 1997.

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Xu, Dianguo, Yueshi Guan, Yijie Wang, and Xiangjun Zhang. Multi-MHz High Frequency Resonant DC-DC Power Converter. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-7424-5.

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The modern converter and filter circuit encyclopedia. Blue Ridge Summit, PA: TAB Books, 1993.

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Anne, WardhGillian. Design of a multi-kilowatt, high frequency, DC-DC converter. Birmingham: University of Birmingham, 2003.

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Corradini, Luca, Dragan Maksimović, Paolo Mattavelli, and Regan Zane. Digital Control of High-Frequency Switched-Mode Power Converters. Hoboken, NJ, USA: John Wiley & Sons, Inc, 2015. http://dx.doi.org/10.1002/9781119025498.

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McLyman, Colonel William T. Designing magnetic components for high frequency DC-DC converters. San Marino, CA (2135 Huntington Dr., Suite 201D, San Marino 91108): KG Magnetics, 1993.

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K, Kokula Krishna Hari, ed. Variable Frequency Digital PWM Control for Low-Power Buck Converters. Chennai, India: Association of Scientists, Developers and Faculties, 2016.

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Moore, Jonathan E. Frequency-based load sharing in current-mode-controlled buck converters. Monterey, Calif: Naval Postgraduate School, 1999.

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Book chapters on the topic "Frequency convertor"

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Murillo, Cristina Azcona, Belén Calvo Lopez, and Santiago Celma Pueyo. "Introduction." In Voltage-to-Frequency Converters, 1–15. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-6237-8_1.

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Murillo, Cristina Azcona, Belén Calvo Lopez, and Santiago Celma Pueyo. "VFC Fundamentals." In Voltage-to-Frequency Converters, 17–34. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-6237-8_2.

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Murillo, Cristina Azcona, Belén Calvo Lopez, and Santiago Celma Pueyo. "Basic VFC Cells." In Voltage-to-Frequency Converters, 35–80. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-6237-8_3.

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Murillo, Cristina Azcona, Belén Calvo Lopez, and Santiago Celma Pueyo. "VFC Architectures." In Voltage-to-Frequency Converters, 81–112. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-6237-8_4.

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Murillo, Cristina Azcona, Belén Calvo Lopez, and Santiago Celma Pueyo. "Conclusions." In Voltage-to-Frequency Converters, 113–16. New York, NY: Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-6237-8_5.

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van Wyk, J. D. "Power Electronic Converters for Drives." In Power Electronics and Variable Frequency Drives, 80–137. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9780470547113.ch3.

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Holtz, J. "Pulse Width Modulation for Electronic Power Converters." In Power Electronics and Variable Frequency Drives, 138–208. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9780470547113.ch4.

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Pierfederici, Serge, Farid Meibody-Tabar, and Jean-Philippe Martin. "Hybrid Current Controller with Large Bandwidth and Fixed Switching Frequency." In Power Electronic Converters, 371–416. Hoboken, NJ USA: John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118621196.ch13.

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Szcześniak, Paweł. "Review of AC–AC Frequency Converters." In Power Systems, 17–86. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4896-8_2.

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Szcześniak, Paweł. "Concept of Matrix-Reactance Frequency Converters." In Power Systems, 87–105. London: Springer London, 2013. http://dx.doi.org/10.1007/978-1-4471-4896-8_3.

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Conference papers on the topic "Frequency convertor"

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Krutyansiy, Victor, Martin Meraner, Josef Schupp, Vojtech Krcmarsky, Helene Hainzer, and Ben Lanyon. "Photon frequency convertor for quantum networks." In 2017 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). IEEE, 2017. http://dx.doi.org/10.1109/cleoe-eqec.2017.8087432.

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Li, Bingyu, Jianqiang Li, Chunjing Yin, Jian Dai, Feifei Yin, Yitang Dai, and Kun Xu. "Microwave photonic frequency up-convertor with frequency doubling and compensation of chromatic-dispersion-induced power fading." In 2017 Conference on Lasers and Electro-Optics - Pacific Rim (CLEO-PR). IEEE, 2017. http://dx.doi.org/10.1109/cleopr.2017.8118998.

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HasanNezhad, Mojtaba, and Abumoslem Jannesari. "High-frequency Direct Digital Frequency Synthesizer design with non-uniform sine-weighted Digital-to-Analog Convertor." In 2014 7th International Symposium on Telecommunications (IST). IEEE, 2014. http://dx.doi.org/10.1109/istel.2014.7000689.

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Hirano, M., J. J. Skiles, and R. L. Kustom. "Simultaneous phase and frequency control of a three-phase Inductor-Convertor Bridge." In 1985 IEEE Power Electronics Specialists Conference. IEEE, 1985. http://dx.doi.org/10.1109/pesc.1985.7071011.

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Jianwu, Wang, and Feng Zhenghe. "Elimination of Systematic Error in the Measurement of Group Delay of Frequency Convertor." In 2015 Fifth International Conference on Instrumentation & Measurement, Computer, Communication and Control (IMCCC). IEEE, 2015. http://dx.doi.org/10.1109/imccc.2015.383.

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Shangzun, Yuan, and Nie Ling. "The Application and Practice of Frequency Convertor with One Transducer and Multi Electric Pumps." In 2011 International Conference on Measuring Technology and Mechatronics Automation (ICMTMA). IEEE, 2011. http://dx.doi.org/10.1109/icmtma.2011.741.

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Chen, S. "A direct frequency domain investigation of the properties of convertor transformer core saturation instability." In Sixth International Conference on AC and DC Power Transmission. IEE, 1996. http://dx.doi.org/10.1049/cp:19960353.

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HasanNezhad, Mojtaba, and Abumoslem Jannesari. "Direct Digital Frequency Synthesizer design with non-uniform squared-sine-weighted Digital-to-Analog Convertor." In 2014 7th International Symposium on Telecommunications (IST). IEEE, 2014. http://dx.doi.org/10.1109/istel.2014.7000736.

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Goudarzi, Navid, and Kyung Soo Han. "River Turbines Controlled by Mechanical Speed Converters." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88417.

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River turbines, also known as zero-head or in-stream turbines, produce electrical power with the kinetic energy of flowing water. Lower investment requirements in their infrastructure, as no dam/head differentials is needed, make them a promising solution to the practice of reducing the power production from conventional resources, especially in remote/off-grid applications. In this work, a speed converter design is introduced to be used for harnessing the hydrokinetic power in a moving mass of water. In contrast to power converters, that convert a variable power to a constant power, a speed converter, converts a variable rotational speed into a constant speed. It has four major advantages: (1) the all-gear configuration facilitates scalability of the power rating, (2) the produced constant speed, a grid-quality constant frequency, with/without grid connection, can be generated, (3) it’s simple and durable design make it a more economic option. The results show these advantageous through lab-scale and real-environment experimental testing.
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Hong Bin Wang and Yu Jian Cheng. "140 GHz Linear to Circular Polarization Convertor Based on Modified Cross Slot Frequency Selective Surface with High Selectivity." In 12th European Conference on Antennas and Propagation (EuCAP 2018). Institution of Engineering and Technology, 2018. http://dx.doi.org/10.1049/cp.2018.0436.

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Reports on the topic "Frequency convertor"

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Roberts, Tony. Single Photon Frequency Convertor with High Quantum Efficiency. Office of Scientific and Technical Information (OSTI), November 2019. http://dx.doi.org/10.2172/1575768.

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Leitherer, Art. Solid State Frequency Converters,. Fort Belvoir, VA: Defense Technical Information Center, July 1995. http://dx.doi.org/10.21236/ada302025.

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

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Liou, L. L., D. M. Lin, J. B. Tsui, J. Schamus, and J. T. Morton. Frequency Calibration of A/D Converter in Software GPS Receivers. Fort Belvoir, VA: Defense Technical Information Center, January 2005. http://dx.doi.org/10.21236/ada483160.

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

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Li, S. T., J. B. McGee, P. M. McGinnis, J. H. Schukantz, and Jr. Characterization of a High-Power, High-Frequency, Soft-Switching Power Converter for EMC Considerations. Fort Belvoir, VA: Defense Technical Information Center, March 2001. http://dx.doi.org/10.21236/ada389847.

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Prasad Enjeti and J.W. Howze. Development of a New Class of Low Cost, High Frequency Link Direct DC to AC Converters for Solid Oxide Fuel Cells (SOFC). Office of Scientific and Technical Information (OSTI), December 2003. http://dx.doi.org/10.2172/861667.

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Hassell, James M., Salome A. Bukachi, Dishon M. Muloi, Emi Takahashi, and Lydia Franklinos. The Natural Environment and Health in Africa. World Wildlife Fund and the Smithsonian Conservation Biology Institute, 2021. http://dx.doi.org/10.5479/10088/111281.

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Much of recent human development has come at the expense of Nature - undermining ecosystems, fragmenting habitats, reducing biodiversity, and increasing our exposure and vulnerability to emerging diseases. For example, as we push deeper into tropical forests, and convert more land to agriculture and human settlements, the rate at which people encounter new pathogens that may trigger the next public health, social and economic crisis, is likely to increase. Expanding and strengthening our understanding of the links between nature and human health is especially important in Africa, where nature brings economic prosperity and wellbeing to more than a billion people. Pandemics such as COVID are just one of a growing number of health challenges that humanity is facing as a result of our one-sided and frequently destructive relationship with nature. This report aims to inform professionals and decision-makers on how health outcomes emerge from human interactions with the natural world and identify how efforts to preserve the natural environment and sustainably manage natural resources could have an impact on human and animal health. While the report focuses on the African continent, it will also be of relevance to other areas of the world facing similar environmental pressures.
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