Thematische Bibliographien / Impedance convertor

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Auswahl der wissenschaftlichen Literatur zum Thema „Impedance convertor“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 18. Februar 2022

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Zeitschriftenartikel zum Thema "Impedance convertor"

Fabre, A., und O. Saaid. „Novel translinear impedance convertor and bandpass filter applications“. Electronics Letters 29, Nr. 9 (1993): 746. http://dx.doi.org/10.1049/el:19930500.

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Miguel, J. M. „New positive-impedance convertor suitable for high-frequency application“. Electronics Letters 21, Nr. 9 (1985): 402. http://dx.doi.org/10.1049/el:19850286.

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Liang, Zhiming, Bin Li, Zhaohui Wu und Yunfeng Hu. „A high input impedance chopper amplifier using negative impedance convertor for implantable EEG recording“. IEICE Electronics Express 17, Nr. 17 (10.09.2020): 20200238. http://dx.doi.org/10.1587/elex.17.20200238.

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Takagi, S., und N. Fujii. „Novel highly linear MOS integrator using a negative impedance convertor (NIC)“. Electronics Letters 30, Nr. 10 (12.05.1994): 746–48. http://dx.doi.org/10.1049/el:19940547.

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Watanabe, Tomoki, Noriko Fukuda und Satoru Hatsukade. „Control of a PWM Convertor for Linear Generator as a Variable Impedance“. IEEJ Transactions on Industry Applications 120, Nr. 2 (2000): 288–96. http://dx.doi.org/10.1541/ieejias.120.288.

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Li, Wenxing, Ning Zhai, Ruilong Chen und Wenhua Yu. „Non-Foster Impedance Wideband Matching Technique for Electrically Small Active Antenna“. International Journal of Antennas and Propagation 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/531419.

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This paper investigates a non-Foster wideband circuit matching technique for an electrically small antenna (ESA). By introducing a negative impedance convertor into an active network, the active network can obtain an equivalent input gain at input port to improve gain, sensitivity and output ratio of signal to noise. In addition, it also increases the effective height of active antenna. The experimental results have verified the proposed method by using a 100 KHz–30 MHz wideband active receiving monopole antenna.

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Zhang, Song, Guoqing Li, Shuguang Li und Xintong Liu. „A Method of Demarcating Critical Failure Impedance Boundary of Multi-Infeed HVDC Systems Based on Minimum Extinction Angle“. Mathematical Problems in Engineering 2021 (31.08.2021): 1–14. http://dx.doi.org/10.1155/2021/9923737.

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A method of rapidly demarcating the critical commutation failure (CF) region of a multi-infeed high-voltage direct-current (HVDC) system is proposed. Based on the nodal impedance matrix and nodal voltage interaction factor, for different AC fault conditions—both balanced and unbalanced—a method of calculating the extinction angles of converters in multi-infeed HVDC systems is deduced in detail. First, the extinction angles of convertor stations under single-phase, double-phase, and three-phase ground faults and line-to-line faults occurring at any bus in an AC system are calculated. The minimum extinction angle serves as a CF criterion. If the calculated extinction angle for a certain bus is smaller than the minimum extinction angle, then a fault at that bus will cause CF of the HVDC system and put that bus into a failed bus set. The critical failure impedance boundaries of the topology diagram can therefore be demarcated by examining every bus in the AC system. The validity and accuracy of the proposed index and the method were verified by calculation results based on the three-infeed HVDC system model of the IEEE 39-bus system. Finally, the critical failure impedance boundary was demarcated in the IEEE 118-bus system to demonstrate the application in a wider range of systems.

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Lahiri, A. „DO-CCII Based Generalised Impedance Convertor Simulates Floating Inductance, Capacitance Multiplier and Fdnr“. Australian Journal of Electrical and Electronics Engineering 7, Nr. 1 (Januar 2010): 15–20. http://dx.doi.org/10.1080/1448837x.2010.11464253.

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Ding, Yuan, und Vincent Fusco. „Loading artificial magnetic conductor and artificial magnetic conductor absorber with negative impedance convertor elements“. Microwave and Optical Technology Letters 54, Nr. 9 (18.06.2012): 2111–14. http://dx.doi.org/10.1002/mop.27019.

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Hu, Pengfei, Li Shen, Feng Han, Fei Yang, Maojiang Song, Li Zhang und Liping Liu. „Development of the data acquisition system for terahertz spectrometer“. Transactions of the Institute of Measurement and Control 40, Nr. 3 (06.04.2017): 805–11. http://dx.doi.org/10.1177/0142331217690475.

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In most Terahertz time-domain spectrometer (THz-TDS) experiments, the lock-in amplifier works with trans-impedance pre-amplifier to amplitude the terahertz pulse accepted from detector. This paper discusses the development of data acquisition system for the transmission THz-TDS. In this system, the cross-correlation software algorithm in SR830 lock-in amplifier from Stanford Research Systems, that is usually used in THz-TDS, has been replaced by parallel hardware algorithm of Field Programmable Gate Array (FPGA) chip with the parallel processing ability. This chip has a faster processing speed and higher accuracy than others. A 24 bit Delta-Sigma Analog Digital (AD) was used in place of the 16 bit successive approximation ADC of SR830. The new AD convertor can reduce the complexity of trans-impedance pre-amplifier circuit and replace the SR555 current amplifiers that designed to work with SRS lock-in amplifiers. Besides trans-impedance pre-amplifier circuit, all function circuits, such as low-pass digital filter, phase-locked loop, Direct Digital Synthesis (DDS) reference source and the core algorithms, are integrated in a FPGA chip, which make the new designed lock-in amplifier with a small volume reduce a dozen times SR830 size.

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Dissertationen zum Thema "Impedance convertor"

Wang, Jinhua. „A Wide Input Power Line Energy Harvesting Circuit For Wireless Sensor Nodes“. Thesis, Virginia Tech, 2021. http://hdl.handle.net/10919/103426.

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Massive deployment of wireless IoT (Internet of Things) devices makes replacement or recharge of batteries expensive and impractical for some applications. Energy harvesting is a promising solution, and various designs are proposed to harvest power from ambient resources including thermal, vibrational, solar, wind, and RF sources. Among these ambient resources, AC powerlines are a stable energy source in an urban environment. Many researchers investigated methods to exploit this stable source of energy to power wireless IoT devices. The proposed circuit aims to harvest energy from AC powerlines with a wide input range of from 10 to 50 A. The proposed system includes a wake-up circuit and is capable of cold-start. A buck-boost converter operating in DCM is adopted for impedance matching, where the impedance is rather independent of the operation conditions. So, the proposed system can be applied to various types of wireless sensor nodes with different internal impedances. Experimental results show that the proposed system achieves an efficiency of 80.99% under the powerline current of 50 A.
M.S.
Nowadays, with the magnificent growth of IoT devices, a reliable, and efficient energy supply system becomes more and more important, because, for some applications, battery replacement is very expensive and sometimes even impossible. At this time, a well-designed self-contained energy harvesting system is a good solution. The energy harvesting system can extend the service life of the IoT devices and reduce the frequency of charging or checking the device. In this work, the proposed circuit aims to harvest energy from the AC power lines, and the harvested power intends to power wireless sensor nodes (WSNs). By utilizing the efficient and self-contained EH system, WSNs can be used to monitor the temperature, pressure, noise level and humidity etc. The proposed energy harvesting circuit was implemented with discrete components on a printed circuit board (PCB). Under a power line current of 50 A @ 50 Hz, the proposed energy harvesting circuit can harvest 156.6 mW, with a peak efficiency of 80.99 %.

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Haskou, Abdullah. „Contribution à l'étude des antennes miniatures directives ou large-bande avec des circuits non-Foster“. Thesis, Rennes 1, 2016. http://www.theses.fr/2016REN1S043/document.

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Pour faire cohabiter les nombreuses technologies radios, les terminaux mobiles nécessitent une miniaturisation de plus en plus poussée des antennes. Toutefois, les performances d'antennes ont des limites fondamentales liées à leurs dimensions physiques. La littérature met en évidence que les réseaux superdirectifs permettent de dépasser la limite de Harrington sur la directivité et que des antennes adaptées par des circuits non-Foster peuvent dépasser la limite de Bode-Fano sur la bande passante. Les contributions essentielles de ce travail de thèse consistent en la conception deréseaux d'antennes superdirectifs et d'antennes adaptées par des circuits non-Foster comme solutions possibles pour l'amélioration des performances des Antennes Electriquement Petites (AEP). Dans une première partie, un convertisseur d'impédance négative est réalisé pour obtenir des condensateurs de valeurs négatives de façon à adapter des antennes miniatures sur une large bande de fréquence. Dans la deuxième partie de ces travaux, les limites théoriques des réseaux d'antennes superdirectifs sont évaluées et une approche simple et pratique permettant la conception de ces réseaux à partir d'éléments parasites est proposée. L'intégration des AEP superdirectives sur des cartes de circuit imprimé est étudiée et les difficultés de mesure de ce type d'antenne sont évaluées. A partir de ces résultats, une nouvelle stratégie pour réaliser des réseaux compactes 3D ou planaires à polarisation linéaire ou circulaire en utilisant des éléments superdirectifs est présentée
For supporting different wireless technologies, mobile terminals require significant miniaturization of antennas. However, antennas performance has some fundamental limits related to their physical dimensions. The available theory shows that superdirective arrays can exceed Harrington’s limit on antenna directivity and non-Foter matched antennas can surpass Bode-Fano limit on antenna bandwidth. Therefore, this work focuses on the design of superdirective antenna arrays and non-Foster matched antennas as possible solutions for improving the performance of Electrically Small Antennas (ESAs). In the first part: a Negative Impedance Converter (NIC) is designed to have a very small negative capacitor. The circuit is evaluated in terms of gain, stability and linearity. Then, the circuit is used to match several small antennas in the UHF band. In the second part: the theoretical limits of superdirective antenna arrays are studied. A simple and practical approach to design parasitic antenna arrays is proposed. The integration of superdirective ESAs in Printed Circuit Boards (PCBs) is studied and the difficulties of measuring this type of antennasare evaluated. A new strategy for the design of 3D or planar compact arrays, with linear or circular-polarization, using superdirective elements is presented

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Tade, Oluwabunmi O. „Negative impedance converter for antenna matching“. Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/4920/.

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This thesis describes research into Negative Impedance Converters (NIC) for antenna matching. There are many applications that require small wideband antennas, from mobile phones and devices which are being required to cover larger frequency bands to cognitive radios that are expected to operate within any frequency band with minimum reconfiguration. However, fundamental limits on antennas such as the Chu-Harrington and Bode-Fano restricts the bandwidths obtainable from small antennas and antennas matched using conventional Foster reactive elements. However, non-Foster elements realised using NICs have been shown to provide wideband matching of antennas independent of frequency. In this thesis, a non-Foster element is designed based on Linvill’s model. A drawback on NIC is stability therefore a new stability analysis is developed and reported in this thesis which correctly predicts the frequency of oscillation. With the aid of this new stability analysis, a 1.5GHz NIC prototype is developed, operating up to 1.5 GHz. Its performance in terms of noise and linearity are also characterized. Another novel NIC schematic is also introduced in the thesis; it makes use of a single transistor and a pair of coupled lines. Because of its use of a single transistor, stability is less critical and hence it is able to achieve a working frequency of 6GHz. Its performance is compared with the NIC based on Linvill’s model. The coupled line NIC has been integrated with an antenna and this prototype shows the expected wideband performance with good gain. System implications of using NICs within an antenna is discussed.

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Cazzell, Gregory A. „Output Impedance in PWM Buck Converter“. Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1247006982.

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Cheong, Heng Wan. „Generalized impedance converter (GIC) filter utilizing composite amplifier“. Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2005. http://library.nps.navy.mil/uhtbin/hyperion/05Sep%5FCheong.pdf.

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Zhang, Guidong [Verfasser]. „Impedance networks matching mechanism and design of impedance networks converters / Guidong Zhang“. Hagen : Fernuniversität Hagen, 2015. http://d-nb.info/1079393064/34.

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Zhang, Xin. „Impedance control and stability of DC/DC converter systems“. Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/13951/.

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Cascaded DC/DC converter systems (or 'cascaded systems') have instability problems; i.e., although the subsystems may work well individually, the whole system may be instable due to the impedance interaction among these subsystems. To solve this problem, a family of impedance-based stabilisation methods are proposed in this thesis. First, parallel-virtual-impedance (PVI) and series-virtual-impedance (SVI) control strategies are proposed to stabilise cascaded systems via shaping the load input impedance. Theoretically, the PVI or SVI control strategy connect a virtual impedance in parallel or series with the input port of the load converter so that the magnitude or phase of the load input impedance can bemodified within a very small frequency range. Therefore, with the PVI or SVI control strategy, the cascaded system can be stabilised with minimal compromise of the load performance. Then, based on the PVI and SVI control strategies, adaptive-PVI (APVI) and adaptive-SVI (ASVI) control strategies are proposed by introducing an adaptive mechanism to change the impedance. With the APVI or ASVI control strategy, the load converter can be stably connected to different source converters without changing its internal structure. It is also shown that the ASVI control strategy is better than the APVI control strategy and can make the cascaded system more stable. Moreover, a minimum-ripple-point-tracking (MRPT) controller is proposed and utilised to solve the potential problem of the ASVI control strategy. Finally, a source-side SVI (SSVI) control strategy and a VRLC damper are proposed to stabilise the cascaded system with better source performance or input filter performance, respectively. All the proposed stabilisation and control methods are validated by extensive experimental results.

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Quinalia, Mateus Siqueira. „Modelagem, análise de estabilidade e controle da tensão da malha Z em inversores fonte de impedância“. Universidade de São Paulo, 2018. http://www.teses.usp.br/teses/disponiveis/18/18153/tde-04022019-091341/.

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O uso crescente de fontes alternativas de energia exige conversores de energia capazes de aumentar sua tensão nos terminais e conectá-los ao sistema de distribuição. Neste contexto, o conversor step-up clássico (conversor de potência CC/CC) e o inversor de fonte de tensão (VSI) são as soluções mais aplicadas para processar o fluxo de energia da fonte para a rede. No entanto, apresentam um baixo rendimento devido ao duplo estágio de conversão, isto é, a energia flui também através dos conversores de energia CC/CC e CC/CA. Para evitar esse tipo de desvantagem, no início da última década, o Z-Source-Inverter (ZSI) foi introduzido. Nesta nova solução, o conversor de energia CC/CC responsável por elevar a tensão nos terminais do conversor foi removido e uma rede de impedância LCLC foi adicionada com duas tarefas, ou seja, aumentar a tensão do terminal e melhorar a eficiência do ZSI. Infelizmente, os trabalhos da literatura não apresentaram um modelo matemático generalizado para apoiar os projetistas de conversores de potência na análise de estabilidade, projeto de controladores ou avaliar o ganho de tensão do conversor. Neste sentido, esta dissertação propõe o desenvolvimento de um modelo matemático completo e a análise de estabilidade da planta. Para suportar todo o desenvolvimento teórico, foi realizado um conjunto de análises no domínio do tempo e da frequência. Por fim, verificou-se o controle da tensão do elo CC para suportar todas as afirmações apresentadas neste trabalho (controle da tensão no capacitor da rede Z).
The growing use of alternative energy sources require power converters able to boost their terminal voltage and connect them to the distribution system. In this context, the classical step-up converter (DC/DC power converter) and the voltage source inverter (VSI) are the most applied solutions to process the power flow from the source to the grid. However, they present a low efficient because of the double stage of conversion, i.e. the power flows through the DC/DC and DC/AC power converters as well. To avoid this type of drawback, in the beginning of the last decade the impedance source inverter (ZSI) was introduce. In this new solution, the DC/DC power converter responsible for boosting the voltage at the DC-source terminals was removed and a Z (LCLC-network) was added with two tasks, i.e. boost the DC-source terminal voltage and improve the ZSI efficiency. Unfortunately, the papers in the literature did not present a generalized mathematical model to support designers of power converters in the analysis of stability, design of controllers or evaluate the voltage gain of the converter. In this sense, this thesis proposes the development of a complete mathematical model and the stability analysis of the plant. To support all the theoretical development a set of analysis in the time and frequency-domain was performed. Finally, the control of DC-link voltage was verified to support all the statements presented in this thesis (control on the Z-network voltage capacitance).

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El, Hamoui Mohamad A. „A Pipeline Analog-To-Digital Converter for a Plasma Impedance Probe“. DigitalCommons@USU, 2009. https://digitalcommons.usu.edu/etd/287.

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Space instrumentation technology is an essential tool for rocket and satellite research, and is expected to become popular in commercial and military operations in fields such as radar, imaging, and communications. These instruments are traditionally implemented on printed circuit boards using discrete general-purpose Analog-to-Digital Converter (ADC) devices and other components. A large circuit board is not convenient for use in micro-satellite deployments, where the total payload volume is limited to roughly one cubic foot. Because micro-satellites represent a fast growing trend in satellite research and development, there is motivation to explore miniaturized custom application-specific integrated circuit (ASIC) designs to reduce the volume and power consumption occupied by instrument electronics. In this thesis, a model of a new Plasma Impedance Probe (PIP) architecture, which utilizes a custom-built ADC along with other analog and digital components, is proposed. The model can be fully integrated to produce a low-power, miniaturized impedance probe.

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Hynek, David. „Přenosný číslicově řízený stabilizovaný zdroj symetrického napětí“. Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2020. http://www.nusl.cz/ntk/nusl-413121.

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This thesis deals with a design of a power supply for a measuring equipment for a geophysical mapping intended to do a reconstruction of an electrical impedance of a ground environment of water reservoirs. The power source is going to be used for laboratory measurements and for outdoor experiments. The thesis describes the selection of suitable components, equipment design and testing. The theoretical part explains the functions of used components and the principle of an electrical impedance tomography. The conclusion summarizes the properties of the proposed solution and evaluates the final product.

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Bücher zum Thema "Impedance convertor"

Zhang, Guidong, Bo Zhang und Zhong Li. Designing Impedance Networks Converters. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-63655-9.

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Korotkov, A. S. Mikroėlektronnye analogovye filʹtry na preobrazovateli︠a︡kh impedansa. Sankt-Peterburg: Nauka, Peterburgskoe otd-nie, 1999.

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Designing Impedance Networks Converters. Springer, 2017.

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Designing Impedance Networks Converters. Springer, 2018.

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Blaabjerg, Frede, Haitham Abu-Rub, Baoming Ge, Omar Ellabban und Poh Chiang Loh. Impedance Source Power Electronic Converters. Wiley & Sons, Incorporated, John, 2016.

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Blaabjerg, Frede, Yushan Liu, Haitham Abu-Rub, Baoming Ge, Omar Ellabban und Poh Chiang Loh. Impedance Source Power Electronic Converters. Wiley-Interscience, 2016.

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Blaabjerg, Frede, Haitham Abu-Rub, Baoming Ge, Omar Ellabban und Poh Chiang Loh. Impedance Source Power Electronic Converters. Wiley & Sons, Incorporated, John, 2016.

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Buchteile zum Thema "Impedance convertor"

Arrillaga, Jos, Bruce C. Smith, Neville R. Watson und Alan R. Wood. „Converter Harmonic Impedances“. In Power System Harmonic Analysis, 283–309. West Sussex, England: John Wiley & Sons, Ltd, 2013. http://dx.doi.org/10.1002/9781118878316.ch10.

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Loh, Poh Chiang. „Z-Source DC-DC Converters“. In Impedance Source Power Electronic Converters, 138–47. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch9.

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Liu, Yushan, Haitham Abu-Rub, Baoming Ge, Frede Blaabjerg, Poh Chiang Loh und Omar Ellabban. „Background and Current Status“. In Impedance Source Power Electronic Converters, 1–19. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch1.

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Loh, Poh Chiang, Yushan Liu, Haitham Abu-Rub und Baoming Ge. „Z-Source Multilevel Inverters“. In Impedance Source Power Electronic Converters, 194–225. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch12.

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Bayhan, Sertac, und Haitham Abu-Rub. „Impedance Source Multi-Leg Inverters“. In Impedance Source Power Electronic Converters, 295–328. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch17.

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Bayhan, Sertac, Mostafa Mosa und Haitham Abu-Rub. „Model Predictive Control of Impedance Source Inverter“. In Impedance Source Power Electronic Converters, 329–61. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch18.

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Trabelsi, Mohamed, und Haitham Abu-Rub. „Grid Integration of Quasi-Z Source Based PV Multilevel Inverter“. In Impedance Source Power Electronic Converters, 362–89. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch19.

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Loh, Poh Chiang, Yushan Liu und Haitham Abu-Rub. „Typical Transformer-Based Z-Source/Quasi-Z-Source Inverters“. In Impedance Source Power Electronic Converters, 113–27. Chichester, UK: John Wiley & Sons, Ltd, 2016. http://dx.doi.org/10.1002/9781119037088.ch7.

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Tietze, Ulrich, Christoph Schenk und Eberhard Gamm. „Controlled Sources and Impedance Converters“. In Electronic Circuits, 767–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2008. http://dx.doi.org/10.1007/978-3-540-78655-9_12.

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Zhang, Guidong, Bo Zhang und Zhong Li. „Design Methodology of Impedance Networks Converters“. In Studies in Systems, Decision and Control, 45–51. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-63655-9_5.

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Konferenzberichte zum Thema "Impedance convertor"

Ranga, Y., L. Matekovits, S. G. Hay und T. S. Bird. „An anisotropic impedance surface for dual-band linear-to-circular transmission polarization convertor“. In 2013 International Workshop on Antenna Technology (iWAT). IEEE, 2013. http://dx.doi.org/10.1109/iwat.2013.6518296.

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Laury, John, Lars Abrahamsson und Math Bollen. „Transient Stability of Rotary Frequency Converter Fed Low Frequency Railway Grids: The Impact of Different Grid Impedances and Different Converter Station Configurations“. In 2018 Joint Rail Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/jrc2018-6247.

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One method of strengthening low frequency AC railway grids is to upgrade Booster Transformer (BT) catenary systems, to Auto Transformer (AT) catenary systems. An AT catenary system has lower equivalent impedance compared to a BT system. Thus, an upgrade makes the existing converter stations electrically closer. Converter stations may have different types of Rotary Frequency Converters (RFCs) installed in them, and it is not well explored how different RFCs behaves and interact during and after a large disturbance. Using the Anderson-Fouad model of synchronous machines to describe the dynamics of RFCs, several case studies have been performed through numerical simulations. The studies investigate the interactions within and between converter stations constituted with different RFC types, for BT as well AT catenary systems. The numerical studies reveal that replacing BT with AT catenary systems, results in a more oscillatory system behaviour. This is seen for example in the power oscillations between and inside converter stations, after fault clearance.

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Ngo, Khai D. T., Alex Phipps, Toshikazu Nishida, Jenshan Lin und Shengwen Xu. „Power Converters for Piezoelectric Energy Extraction“. In ASME 2006 International Mechanical Engineering Congress and Exposition. ASMEDC, 2006. http://dx.doi.org/10.1115/imece2006-14343.

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Passive circuits and active circuits (i.e., switched-mode power converters) for vibration-energy harvesting are reviewed, focusing on power-extraction efficiency (PEE). Optimal battery voltage and resistance are given for maximal power extraction by passive circuits. Switched-mode converters are reviewed as means to match the actual battery voltage or load resistance to the optimal ones. To emulate the optimal battery voltage or load resistor, these converters could be controlled by pulse-width modulation (PWM) or by resonance, could operate in continuous or discontinuous conduction modes (CCM or DCM), and could leverage the piezoelectric (PZT) impedances in the energy extraction process. The large filter capacitor usually found after the bridge rectifier actually degrades the PEE. Resonance between the output capacitor of the PZT and the converter inductor improves the PEE at the expense of higher voltage and current stresses.

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Rezaei Niya, Seyed Mohammad, und Mina Hoorfar. „Temperature Sensitivity Analysis of Electrochemical Impedance Spectroscopy Results in PEM Fuel Cells“. In ASME 2012 10th International Conference on Fuel Cell Science, Engineering and Technology collocated with the ASME 2012 6th International Conference on Energy Sustainability. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/fuelcell2012-91071.

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The proton exchange membrane fuel cell (PEMFC) is a promising substitute for classic energy converter machines. However, there are still concerns regarding reliability and durability of PEMFCs, and hence, various modeling methods have been employed. One of the effective methods used for analysis and diagnosis of the fuel cell and other electrochemistry systems is Electrochemical Impedance Spectroscopy (EIS) which has been well established due to its high speed and precision. In this paper, the temperature sensitivity of the EIS results at different current densities obtained for a high temperature PEMFC are studied using electrochemical impedances reported in the literature. The magnitude of different elements in the proposed equivalent circuit for different temperatures and current densities, and root mean squares of deviation of various measurements are extracted. Then, the significance of the variations for different temperatures is examined via t-test. Finally, the minimum temperature change at different currents that can be captured by EIS is determined considering the root mean squares of measured values.

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B, Haritha, Tarakanath Kobaku, Mosaddique Nawaz Hussain und Vivek Agarwal. „Stability Enhancement of Cascaded Power Converters Using Parallel Virtual Impedance Via Output Impedance Shaping of the Source Converter“. In 2020 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES). IEEE, 2020. http://dx.doi.org/10.1109/pedes49360.2020.9379354.

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Varga, L. D., und N. A. Losic. „Synthesis of zero-impedance converter“. In Applied Power Electronics Conference and Exposition. IEEE, 1990. http://dx.doi.org/10.1109/apec.1990.66415.

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Raghuram, M., Avneet K. Chauhan und Santosh K. Singh. „Switched capacitor impedance matrix converter“. In 2017 IEEE Energy Conversion Congress and Exposition (ECCE). IEEE, 2017. http://dx.doi.org/10.1109/ecce.2017.8095906.

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Sato, Kazushi, Ryuji Kuse und Takeshi Fukusako. „Negative Impedance Converter with reduced real part of input impedance“. In 2019 International Workshop on Electromagnetics: Applications and Student Innovation Competition (iWEM). IEEE, 2019. http://dx.doi.org/10.1109/iwem.2019.8887925.

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Eguchi, Keisuke, und Takeshi Fukusako. „Stability analysis of negative impedance converter“. In 2017 IEEE International Conference on Computational Electromagnetics (ICCEM). IEEE, 2017. http://dx.doi.org/10.1109/compem.2017.7912760.

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„Impedance Source Converter Topologies and Applications“. In IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2018. http://dx.doi.org/10.1109/iecon.2018.8591420.

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