Relevant bibliographies by topics / Transition voltage

Academic literature on the topic 'Transition voltage'

Author: Grafiati
Published: 10 December 2022
Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Transition voltage.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Transition voltage"

1

Ohtsuki, Hiroshi, Akihiko Yokoyama, and Yasuji Swkine. "Voltage Stability Transition during Voltage Collapse." IEEJ Transactions on Power and Energy 112, no. 7 (1992): 615–21. http://dx.doi.org/10.1541/ieejpes1990.112.7_615.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ledwell, Jennifer L., and Richard W. Aldrich. "Mutations in the S4 Region Isolate the Final Voltage-dependent Cooperative Step in Potassium Channel Activation." Journal of General Physiology 113, no. 3 (March 1, 1999): 389–414. http://dx.doi.org/10.1085/jgp.113.3.389.

Full text
Abstract:
Charged residues in the S4 transmembrane segment play a key role in determining the sensitivity of voltage-gated ion channels to changes in voltage across the cell membrane. However, cooperative interactions between subunits also affect the voltage dependence of channel opening, and these interactions can be altered by making substitutions at uncharged residues in the S4 region. We have studied the activation of two mutant Shaker channels that have different S4 amino acid sequences, ILT (V369I, I372L, and S376T) and Shaw S4 (the S4 of Drosophila Shaw substituted into Shaker), and yet have very similar ionic current properties. Both mutations affect cooperativity, making a cooperative transition in the activation pathway rate limiting and shifting it to very positive voltages, but analysis of gating and ionic current recordings reveals that the ILT and Shaw S4 mutant channels have different activation pathways. Analysis of gating currents suggests that the dominant effect of the ILT mutation is to make the final cooperative transition to the open state of the channel rate limiting in an activation pathway that otherwise resembles that of Shaker. The charge movement associated with the final gating transition in ILT activation can be measured as an isolated component of charge movement in the voltage range of channel opening and accounts for 13% (∼1.8 e0) of the total charge moved in the ILT activation pathway. The remainder of the ILT gating charge (87%) moves at negative voltages, where channels do not open, and confirms the presence of Shaker-like conformational changes between closed states in the activation pathway. In contrast to ILT, the activation pathway of Shaw S4 seems to involve a single cooperative charge-moving step between a closed and an open state. We cannot detect any voltage-dependent transitions between closed states for Shaw S4. Restoring basic residues that are missing in Shaw S4 (R1, R2, and K7) rescues charge movement between closed states in the activation pathway, but does not alter the voltage dependence of the rate-limiting transition in activation.
APA, Harvard, Vancouver, ISO, and other styles
3

Zagotta, W. N., T. Hoshi, J. Dittman, and R. W. Aldrich. "Shaker potassium channel gating. II: Transitions in the activation pathway." Journal of General Physiology 103, no. 2 (February 1, 1994): 279–319. http://dx.doi.org/10.1085/jgp.103.2.279.

Full text
Abstract:
Voltage-dependent gating behavior of Shaker potassium channels without N-type inactivation (ShB delta 6-46) expressed in Xenopus oocytes was studied. The voltage dependence of the steady-state open probability indicated that the activation process involves the movement of the equivalent of 12-16 electronic charges across the membrane. The sigmoidal kinetics of the activation process, which is maintained at depolarized voltages up to at least +100 mV indicate the presence of at least five sequential conformational changes before opening. The voltage dependence of the gating charge movement suggested that each elementary transition involves 3.5 electronic charges. The voltage dependence of the forward opening rate, as estimated by the single-channel first latency distribution, the final phase of the macroscopic ionic current activation, the ionic current reactivation and the ON gating current time course, showed movement of the equivalent of 0.3 to 0.5 electronic charges were associated with a large number of the activation transitions. The equivalent charge movement of 1.1 electronic charges was associated with the closing conformational change. The results were generally consistent with models involving a number of independent and identical transitions with a major exception that the first closing transition is slower than expected as indicated by tail current and OFF gating charge measurements.
APA, Harvard, Vancouver, ISO, and other styles
4

Huisman, Everardus H., Constant M. Guédon, Bart J. van Wees, and Sense Jan van der Molen. "Interpretation of Transition Voltage Spectroscopy." Nano Letters 9, no. 11 (November 11, 2009): 3909–13. http://dx.doi.org/10.1021/nl9021094.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Lúcio da Silva Martins, Mário, Jumar Luís Russi, José Renes Pinheiro, and Hélio Leães Hey. "Zero-current Zero-voltage Transition Pwm Converters With Magnetically Coupled Auxiliary Circuit." Eletrônica de Potência 13, no. 4 (November 1, 2008): 201–8. http://dx.doi.org/10.18618/rep.2008.4.201208.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Guichao Hua, Ching-Shan Leu, Yimin Jiang, and F. C. Y. Lee. "Novel zero-voltage-transition PWM converters." IEEE Transactions on Power Electronics 9, no. 2 (March 1994): 213–19. http://dx.doi.org/10.1109/63.286814.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Chan, Y. H., C. C. Lim, K. T. Lau, and S. H. Foo. "Low power critical voltage transition logic." Microelectronics International 23, no. 3 (September 2006): 3–8. http://dx.doi.org/10.1108/13565360610680695.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Richter, C., Z. Wu, and L. Menon. "Pattern Formation in Nanoporous Titania Templates." Journal of Nanoscience and Nanotechnology 7, no. 2 (February 1, 2007): 704–7. http://dx.doi.org/10.1166/jnn.2007.122.

Full text
Abstract:
We have carried out a systematic investigation into the formation of nanoscaled patterns in titania (TiO2) templates under dc anodization of Ti in HF acid. At lower acid concentrations (around 0.5 wt% HF) either pores or tubes form at the surface of anodized titanium foil. The pores or nanotubes are separated from the bottom Ti layer by a thin barrier layer of TiO2. The critical voltage where the transition from pores to tubes occurs has been determined. It is observed that the transition voltage shift towards higher voltages as acid concentration is increased, with pore formation disappearing altogether at high acid concentrations. We have also carried out a systematic investigation into the dependence of pore and tube parameters on the applied dc anodization voltage. Our results indicate that the barrier layer thickness, pore and tube length increase as a function of applied voltage.
APA, Harvard, Vancouver, ISO, and other styles
9

Zagotta, W. N., and R. W. Aldrich. "Voltage-dependent gating of Shaker A-type potassium channels in Drosophila muscle." Journal of General Physiology 95, no. 1 (January 1, 1990): 29–60. http://dx.doi.org/10.1085/jgp.95.1.29.

Full text
Abstract:
The voltage-dependent gating mechanism of A1-type potassium channels coded for by the Shaker locus of Drosophila was studied using macroscopic and single-channel recording techniques on embryonic myotubes in primary culture. From a kinetic analysis of data from single A1 channels, we have concluded that all of the molecular transitions after first opening, including the inactivation transition, are voltage independent and therefore not associated with charge movement through the membrane. In contrast, at least some of the activation transitions leading to first opening are considerably voltage dependent and account for all of the voltage dependence seen in the macroscopic currents. This mechanism is similar in many ways to that of vertebrate neuronal voltage-sensitive sodium channels, and together with the sequence similarities in the S4 region suggests a conserved mechanism for voltage-dependent gating among channels with different selectivities. By testing independent and coupled models for activation and inactivation we have determined that the final opening transition and inactivation are not likely to arise from the independent action of multiple subunits, each with simple gating transitions, but rather come about through their aggregate properties. A partially coupled model accurately reproduces all of the single-channel and macroscopic data. This model will provide a framework on which to organize and understand alterations in gating that occur in Shaker variants and mutants.
APA, Harvard, Vancouver, ISO, and other styles
10

Horrigan, Frank T., and Richard W. Aldrich. "Coupling between Voltage Sensor Activation, Ca2+ Binding and Channel Opening in Large Conductance (BK) Potassium Channels." Journal of General Physiology 120, no. 3 (August 26, 2002): 267–305. http://dx.doi.org/10.1085/jgp.20028605.

Full text
Abstract:
To determine how intracellular Ca2+ and membrane voltage regulate the gating of large conductance Ca2+-activated K+ (BK) channels, we examined the steady-state and kinetic properties of mSlo1 ionic and gating currents in the presence and absence of Ca2+ over a wide range of voltage. The activation of unliganded mSlo1 channels can be accounted for by allosteric coupling between voltage sensor activation and the closed (C) to open (O) conformational change (Horrigan, F.T., and R.W. Aldrich. 1999. J. Gen. Physiol. 114:305–336; Horrigan, F.T., J. Cui, and R.W. Aldrich. 1999. J. Gen. Physiol. 114:277–304). In 0 Ca2+, the steady-state gating charge-voltage (QSS-V) relationship is shallower and shifted to more negative voltages than the conductance-voltage (GK-V) relationship. Calcium alters the relationship between Q-V and G-V, shifting both to more negative voltages such that they almost superimpose in 70 μM Ca2+. This change reflects a differential effect of Ca2+ on voltage sensor activation and channel opening. Ca2+ has only a small effect on the fast component of ON gating current, indicating that Ca2+ binding has little effect on voltage sensor activation when channels are closed. In contrast, open probability measured at very negative voltages (less than −80 mV) increases more than 1,000-fold in 70 μM Ca2+, demonstrating that Ca2+ increases the C-O equilibrium constant under conditions where voltage sensors are not activated. Thus, Ca2+ binding and voltage sensor activation act almost independently, to enhance channel opening. This dual-allosteric mechanism can reproduce the steady-state behavior of mSlo1 over a wide range of conditions, with the assumption that activation of individual Ca2+ sensors or voltage sensors additively affect the energy of the C-O transition and that a weak interaction between Ca2+ sensors and voltage sensors occurs independent of channel opening. By contrast, macroscopic IK kinetics indicate that Ca2+ and voltage dependencies of C-O transition rates are complex, leading us to propose that the C-O conformational change may be described by a complex energy landscape.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Transition voltage"

1

Choi, Jae-Young. "Analysis of Inductor-Coupled Zero-Voltage-Transition Converters." Diss., Virginia Tech, 2001. http://hdl.handle.net/10919/28537.

Full text
Abstract:
As is the case for DC-DC converters, multi-phase converters require both high-quality power control and high power-density. Although a higher switching frequency not only improves the quality of the converter output but also decreases the size of the converter, it increases switching losses and electromagnetic interference (EMI) noise. Since the soft-switching topologies reduce the switching losses of the converter main switches, the topologies make converters partially independent from the switching frequency. However, the conventional soft-switching topologies have already proposed most of the possible ways to improve converter performance. In addition, the trends of the newly generated power devices reduce the advantages of soft-switching topologies. This critical situation surrounding soft-switching topologies gives research motivations: What features of soft-switching topologies facilitate their practical applications? Given this motivation, the dissertation discusses two aspects = simplifying auxiliary circuits and accounting for the effects of soft-switching operations on the converter control. Engineers working with medium- and high-power multi-phase converters require simplified soft-switching topologies that have the same level of performance as the conventional soft-switching topologies. This demand is the impetus behind one of the research objectives = simplifying the auxiliary circuits of Zero-Voltage-Transition (ZVT) inverters. Simplifying the auxiliary circuits results in both a smaller number of and lower cost for auxiliary components, without any negative impact on performance. This dissertation proposes two major concepts for the simplification - the Single-Switch Single-Leg (S3L) ZVT cell and the Phase-Lock (PL) concept. Throughout an effort to eliminate circulating currents of inductor-coupled (IC) ZVT converters, the S3L ZVT cell is developed. The proposed cell allows a single auxiliary switch to achieve zero-voltage conditions for both the top and bottom main switches, and it achieves the same level of performance as the conventional ZVT cell, as well. This proposal makes IC ZVT topologies more attractive to multi-phase converter applications. Because all of the top main switches generally have identical sequences for zero-voltage turn-on commutations, one auxiliary switch might handle the commutations of all of the top main switches. This possibility introduces the PL concept, which allows the two auxiliary switches to provide a zero-voltage condition for any main switch commutation. In order to compensate for restrictions of this concept, a modified space-vector modulation (SVM) scheme also is introduced. A soft-switching topology changes the duty ratios of the converter, which affects the controllability of the converter. Therefore, this dissertation selects resolution of this issue as one of the research objectives. This dissertation derives the generalized timing equations of ZVT operations, and the generalized equations formulize the effect of ZVT operation on both duty ratios and DC current. Moreover, the effect of SVM schemes is also investigated. An average model of the ZVT converter is developed using both the timing analysis and the investigation of SVM schemes, and small-signal analysis using the average model predicts the steady-state characteristics of the converter.
Ph. D.
APA, Harvard, Vancouver, ISO, and other styles
2

Ambatipudi, Ravindra. "Modeling and control of zero-voltage transition three-phase PWM boost rectifier." Thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-06162009-063557/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Nose, Masafumi. "Studies on Sodium-containing Transition Metal Phosphates for Sodium-ion Batteries." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215565.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Spitzig, Alyson. "The importance of Joule heating on the voltage-triggered insulator-to-metal transition in VO₂." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62808.

Full text
Abstract:
The large change in resistivity in the material VO₂ has attracted considerable attention since it was first discovered in 1959. Recently, the ability to trigger the insulator-to-metal transition (IMT) with a strong electric field has been observed, but there has been debate about whether the transition is due to field-effects. We apply a voltage bias across a VO₂ thin film via a conductive atomic force microscope (CAFM) tip and measure the resultant current. We observe the IMT as a jump in the measured current in the IV curves. We fit the IV curves to the Poole-Frenkel (PF) conduction mechanism in the insulating state, immediately preceding the IMT. The PF conduction mechanism describes the thermal excitation of electrons into the conduction band in insulators, facilitated by strong electric fields. The PF mechanism is temperature dependent, and we use the temperature dependence to calculate the local temperature of the film before the transition. We directly compare the local electric field and local temperature of the film immediately preceding the IMT. We determine that the transition is not solely due to the applied electric field, but rather that the tip has locally warmed the film close to its IMT temperature through Joule heating.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
APA, Harvard, Vancouver, ISO, and other styles
5

Cuadros, O. Carlos E. "Modified Space Vector Modulation for a Zero-Voltage Transition Three-Phase to DC Bi-directional Converter." Thesis, Virginia Tech, 1995. http://hdl.handle.net/10919/36712.

Full text
Abstract:
A modified space vector modulation algorithm for a zero-voltage transition three-phase voltage source inverter/boost rectifier is presented. The converter is intended for high performance medium power applications requiring bi-directional power flow. The proposed modified space vector modulation allows the main switches to be operated with constant frequency and soft switching for any phase shift between the three-phase currents and voltages. The modulation algorithm also eliminates any low frequency distortion caused by the zero-voltage transition and can be extended to other soft-switching PWM three-phase converters. Experimental verification of the proposed algorithm is also presented as well as a comparison to the hard switched PWM converter.
Master of Science
APA, Harvard, Vancouver, ISO, and other styles
6

Wu, T. H. "Optimising cell voltage and understanding charge storage mechanism of transition metal oxides and hydroxides for aqueous supercapacitors." Thesis, University of Liverpool, 2016. http://livrepository.liverpool.ac.uk/3002214/.

Full text
Abstract:
This study focuses on aqueous electrochemical capacitors (ECs) for optimising the cell voltage and understanding the charge storage mechanism of transition metal oxides and hydroxides. The first part discusses how to optimise cell voltage of symmetric and asymmetric ECs. In Chapter 4, a commercial activated carbon (ACS–679) was employed as an electroactive material to demonstrate the necessity of charge–balanced condition of aqueous symmetric ECs in order to improve the utilisation of electrochemically stable potential window of electroactive material. Besides, the effect of stable open–circuit potential on electroactive materials is also addressed here. The concept is on the basis of electrochemical charge–balance principle, therefore, it is believed to be applicable to all the symmetric ECs no matter what kind of material is used as electroactive material. The charge–balanced electric double–layer capacitors (EDLCs) was assembled to evaluate the acceptable cell voltage by means of electrochemical analyses, including cyclic voltammogram, constant current charge–discharge, electrochemical impedance spectroscopy and inductance–capacitance–resistance meter measurements. Moreover, charge–unbalanced EDLCs were used to demonstrate the necessity of charge balance in symmetric ECs since those exhibit lower cell voltage and specific energy compared with the charge–balanced case. Similarly, in Chapter 5, asymmetric ECs consisting of reduce graphene oxide and manganese oxide (RGO//MnOx) were employed as an example to establish criteria for determining the highest acceptable cell voltage of asymmetric ECs with excellent reversibility and capacitor−like behaviour. It is very useful to evaluate the practical specific energy of asymmetric ECs by understanding the highest acceptable cell voltage. Besides, RGO//RuO2 was also demonstrated to verify the validity of the proposed criteria. The second part probes the charge storage mechanism of transition metal oxides and hydroxides in aqueous ECs. In Chapter 6, a wide–ranging study on electrochemical activation from Mn3O4 to MnO2 in 0.5 M Na2SO4 medium were presented, which includes in operando monitoring of the structural evolution during the activation process via in situ Raman microscopy. Other advanced material characterisation techniques, such as powder X–ray diffraction, X–ray photoelectron spectroscopy, scanning electron and transmission electron microscopy, were also applied to analyse the as–prepared and activated MnOx. Due to the structural disordering of electrochemically activated birnessite−MnO2 and residual Mn3O4, the charge storage is attributable to the redox reaction between Mn(III) and Mn(IV) at outer surface active sites, rather than cations and/or protons intercalation into layer structures. In Chapter 7, the redox behaviours of γ−NiOOH/α−Ni(OH)2 in various electrolytes (LiOH, NaOH, KOH, CsOH and NH4OH) are discussed. The charge storage mechanism of γ−NiOOH/α−Ni(OH)2 was studied by means of EQCM and in situ Raman microscopy. Moreover, the computational simulation (DFT+U) based on EQCM results gives a better idea on the compositional changes in the first few potential cycles. The insertion/removal of Li+ does not alter the content of water inside the structure, while the insertion of Na+ and K+ leads to a significant removal of water. The removed water molecules cannot be reversibly re−inserted back into the nickel structure, leading to the loss of water molecules in Ni(OH)2 structure during charge–discharge process. The capability to retain water molecules inside the Ni(OH)2 is crucial for the stability of γ−NiOOH/α−Ni(OH)2 redox reaction.
APA, Harvard, Vancouver, ISO, and other styles
7

Powers, Alex D. "A Study of Constant Voltage Anemometry Frequency Response." DigitalCommons@CalPoly, 2016. https://digitalcommons.calpoly.edu/theses/1570.

Full text
Abstract:
The development of the constant voltage anemometer (CVA) for the boundary layer data system (BLDS) has been motivated by a need for the explicit autonomous measurement of velocity fluctuations in the boundary layer. The frequency response of a sensor operated by CVA has been studied analytically and experimentally. The thermal lag of the sensor is quantified by a time constant, MCVA. When the time constant is decreased, the half-amplitude cut-off frequency, fCVA, is increased, thereby decreasing the amount of attenuation during measurements. In this thesis, three main approaches have been outlined in theory and tested experimentally to determine the feasibility and effectiveness of implementing them with CVA to limit attenuation: operation at higher Vw, implementation of software compensation, and utilization of smaller diameter sensors. Operation of CVA at higher voltage results in little improvement in frequency response but is accompanied by increased danger of wire burnout. However, sensors do need to be operated at high wire voltages to be more sensitive to velocity fluctuations and less sensitive to temperature fluctuations, without reaching a temperature high enough for wire burnout. Software compensation of the CVA output has been shown not to be useful for measurements with BLDS. The electrical noise present in the CVA measurement system is amplified by the correction algorithm and creates measurements that are not representative of the fluctuations being measured. Decreasing sensor diameter leads to a significant decrease of MCVA and therefore increase of fCVA. Under similar operating conditions, a 2.5 micron diameter sensor showed less roll off in the frequency spectra (measured higher turbulence intensities) than a 3.8 micron diameter sensor for tests in both a turbulent jet and in a turbulent boundary layer. Smaller sensors are more fragile and have been shown to have a decrease in sensitivity as compared to larger sensors; however, for some applications, the increase in frequency response may be worth the trade-off with fragility and sensitivity.
APA, Harvard, Vancouver, ISO, and other styles
8

Ricoeur, Guillaume. "Caractérisations électriques et analyse de la méthode "Transition Voltage Spectroscopy" sur les jonctions moléculaires à base de molécules alkyles." Thesis, Lille 1, 2012. http://www.theses.fr/2012LIL10091/document.

Full text
Abstract:
Nous avons évalué la méthode de "Transition Voltage Spectroscopy" (TVS) pour déterminer le niveau d'énergie des orbitales moléculaires impliquées dans le transport électronique (ou hauteur de barrière) à travers une jonction moléculaire (électrode-molécule-électrode). Pour cela, nous avons réalisé un grand nombre de jonctions moléculaires, avec des électrodes de différentes formes (goutte, pointe, couche) et de différents métaux (or, aluminium, mercure, gallium-indium). Nous utilisons pour la partie molécule des jonctions moléculaires des monocouches auto-organisées (SAM) réalisées avec différentes molécules alkyles. Nous montrons que la TVS pour les jonctions moléculaires sans oxyde aux interfaces électrode/molécule, donne des tensions de transition qui correspondent à la queue de la densité d’état des orbitales moléculaires, et non au sommet du pic de la densité d'état. Ce résultat a été obtenu en comparant les résultats TVS avec des mesures d'UPS et d'IPES réalisées sur les mêmes SAMs. Pour les jonctions moléculaires avec au moins une interface électrode/molécule oxydée, nous montrons que la tension de transition correspond au niveau d'énergie de l'oxyde à l’interface et non pas aux orbitales moléculaires de la SAM. Nous avons validé cette hypothèse grâce à des mesures de référence sur des jonctions sans SAM. Nous avons également comparé la TVS avec d'autres méthodes comme le modèle de Simmons, et nous avons étudié l'influence sur la TVS de différents paramètres : la force d'appui par C-AFM, l'asymétrie/symétrie de la jonction et la longueur des molécules
We assess the performances of the transition voltage spectroscopy (TVS) method to determine the energies of the molecular orbitals involved in the electronic transport (barrier height) through molecular junctions (electrode-molecule-electrode). For this, we made a large number of molecular junctions with electrodes of various shapes (drop, tip, layer) and various metals (gold, aluminum, mercury, gallium-indium). We use for the molecule part of the molecular jonctions self-assembled monolayers (SAMs) made with various alkyl molecules. We show that the transition voltages obtained by TVS for molecular junctions without oxide at the interfaces electrode / molecule correspond to the tail of the density of states of the molecular orbitals, and not to the top of the density of states. This result was obtained by comparing the TVS results with UPS and IPES measurements performed on the same SAM. In the case of molecular junctions with at least one electrode/molecule interface oxidized, we show that the transition voltage corresponds to the energy level of the oxide at the interface and not to the molecular orbital of the SAM. We validated this hypothesis with reference measurements on junctions without SAM. We also compared the TVS with other methods e.g. the Simmons model, and we studied the influence on TVS of various parameters: loading force by C-AFM, junction asymmetry/symmetry and molecule length
APA, Harvard, Vancouver, ISO, and other styles
9

Weerasinghe, Hasitha C. "Electrical characterization of metal-to-insulator transition in iron silicide thin films on sillicone substrates." [Tampa, Fla] : University of South Florida, 2006. http://purl.fcla.edu/usf/dc/et/SFE0001677.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Jacquet, Quentin. "Li-rich Li3MO4 model compounds for deciphering capacity and voltage aspects in anionic redox materials." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS332.

Full text
Abstract:
Le réchauffement climatique, provoqué par l’augmentation de la concentration de CO2 dans l’atmosphère, est un problème majeur du 21ème siècle. C’est pourquoi, il est d’une importance capitale de valoriser l’utilisation des énergies renouvelables et des technologies de stockage d’énergie telles que les batteries Li-ion. Suivant ce but, les chercheurs ont mis au point un nouveau matériau d’électrode, le Li-rich NMC, dont l’utilisation permet d’augmenter significativement la capacité des batteries Li-ion grâce à la participation des oxygènes de l’oxyde dans la réaction électrochimique. Cependant, ce nouveau phénomène va de pair avec une hystérésis de potentiel qui empêche la commercialisation du Li-rich NMC. Afin de proposer une solution à l’hystérésis de potentiel tout en continuant à augmenter la capacité des électrodes, des études fondamentales sont nécessaires, notamment: la redox anionique a-t-elle une limite de capacité ? et, quelle est l’origine de l’hystérésis ? Pour répondre à la première question, nous avons conçu des matériaux, de composition chimique A3MO4 (A étant du Li ou Na, et M un mix de Ru, Sb, Nb, Ta ou Ir), ayant une redox anionique exacerbée. Après avoir caractérisé la structure de ces nouveaux matériaux, nous avons étudié leur mécanisme électrochimique et montré que la redox anionique est limitée par la décomposition de l’électrode via formation de O2 ou dissolution. Dans un second temps, par l’étude de deux nouveaux matériaux, Li1.3Ni0.27Ta0.43O2 et Li1.3Mn0.4Ta0.3O2 ayant des hystérésis de potentiel très différentes, nous avons montré le lien entre la redox anionique, la taille de la bande interdite, et l’hystérésis de potentiel
Global warming, due to the increasing CO2 concentration in the atmosphere, is a major issue of the 21th century, hence the need to move towards the use of renewable energies and the development of electrical storage devices, such as Li-ion batteries. Along that line, a new electrode material called Li-rich NMCs have been developed, having higher capacity, 290 mAh/g, than commercial materials, like LiCoO2 (150 mAh/g), thanks to participation of oxygen anions into the redox reaction. This process, called anionic redox, unfortunately comes with voltage hysteresis preventing the commercialization of Li-rich NMC. To alleviate this issue while increasing the capacity, fundamental understanding on anionic redox is needed, specifically concerning two points: is anionic redox limited in terms of capacity? And what is the origin of the voltage hysteresis? In a first part, with the aim to assess the limit of anionic redox capacity, we designed new compounds, having enhanced oxygen oxidation behavior, belonging to the A3MO4 family (A being Li or Na and with M a mix of Ru, Ir, Nb, Sb or Ta). We performed their synthesis, deeply characterized their structure, and, by studying their charge compensation mechanism, we showed that anionic redox is always limited by either O2 release or metal dissolution. In a second part, we designed two new materials, Li1.3Ni0.27Ta0.43O2 and Li1.3Mn0.4Ta0.3O2, having different voltage hysteresis, in order to identify the origin of this phenomenon. Coupling spectroscopic techniques with theoretical calculations, we suggest that the electronic structure, namely the size of the charge transfer band gap, plays a decisive role in voltage hysteresis
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Transition voltage"

1

Chatellier, Louis. Religions En Transition Dans La Seconde Meihe Du XVIIIe Siecle (Studies on Voltaire & the Eighteenth Century). Voltaire Foundation, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles

Book chapters on the topic "Transition voltage"

1

V. Ramesh and Y. Kusuma Latha. "Novel Zero Voltage Transition-Based Interleaved Boost Converter." In Proceedings of the International Conference on Data Engineering and Communication Technology, 537–47. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1675-2_53.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Xiao, Huafeng, Ruibin Wang, Chenhui Niu, Yun Liu, and Kairong Qian. "Zero-Voltage-Transition TLIs with Two-Quadrant Resonance Networks." In CPSS Power Electronics Series, 131–62. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3038-6_6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Xiao, Huafeng, Ruibin Wang, Chenhui Niu, Yun Liu, and Kairong Qian. "Zero-Voltage-Transition TLIs with Single-Quadrant Resonance Networks." In CPSS Power Electronics Series, 95–129. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-3038-6_5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Belaidi, Hadjira, Hamid Bentarzi, Zakaria Rabiai, and Abdelkader Abdelmoumene. "Multi-agent System for Voltage Regulation in Smart Grid." In Artificial Intelligence and Renewables Towards an Energy Transition, 487–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63846-7_46.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

ter Avest, D., and L. J. M. van de Klundert. "Numerical Analysis of the Voltage Current Transition in Superconducting Cables." In 11th International Conference on Magnet Technology (MT-11), 259–63. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0769-0_44.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Liu, H. C., Jianmeng Li, Z. R. Wasilewski, M. Buchanan, P. H. Wilson, M. Lamm, and J. G. Simmons. "A three-color voltage tunable quantum well intersubband photodetector for long wavelength infrared." In Quantum Well Intersubband Transition Physics and Devices, 123–33. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-011-1144-7_10.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Bennia, Ilyas, Yacine Daili, and Abdelghani Harrag. "Hierarchical Control of Paralleled Voltage Source Inverters in Islanded Single Phase Microgrids." In Artificial Intelligence and Renewables Towards an Energy Transition, 302–13. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63846-7_30.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Okuma, Satoshi, Nobuhito Kokubo, and Mikio Kamada. "Vortex Dynamics Below The Kosterlitz-Thouless Transition Detected By Voltage Noise." In Advances in Superconductivity XII, 296–98. Tokyo: Springer Japan, 2000. http://dx.doi.org/10.1007/978-4-431-66877-0_85.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Elislam, Chelli Seif, Boussaid Abdelfettah, and Nemmour Ahmed Lokmane. "Extracting Methods of Positive and Negative Voltage Sequences for Unbalanced Three-Phase Systems." In Artificial Intelligence and Renewables Towards an Energy Transition, 877–84. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-63846-7_85.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Dadabaev, Shakhboz Tolibjonovich, Elena Ivanovna Gracheva, and Zainura Anvarkhonovna Dadabaeva. "Study of Starting Transition Processes of Asynchronous Motor at a Lowered Mains Voltage Frequency." In Lecture Notes in Civil Engineering, 206–13. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-67654-4_23.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Transition voltage"

1

Gaxiola, E. H. R. "Streamers and transition to breakdown." In 11th International Symposium on High-Voltage Engineering (ISH 99). IEE, 1999. http://dx.doi.org/10.1049/cp:19990687.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Adib, Ehsan, and Hosein Farzaneh-fard. "New Zero Voltage Transition PWM Converters." In 2006 IEEE International Conference on Industrial Technology. IEEE, 2006. http://dx.doi.org/10.1109/icit.2006.372360.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Guinane, A., D. McPhail, and M. Gorman. "Impacts of voltage transition from 240V to 230V voltage standard." In 2016 Australasian Universities Power Engineering Conference (AUPEC). IEEE, 2016. http://dx.doi.org/10.1109/aupec.2016.7749295.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Veerachary, Mummadi, Manasvi Goyal, and Hemant Raghuwanshi. "Analysis of Zero Voltage Transition SEPIC converter." In 2012 IEEE 7th International Conference on Industrial and Information Systems (ICIIS). IEEE, 2012. http://dx.doi.org/10.1109/iciinfs.2012.6304813.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Veerachary, M., and Ronil Chaudhuri. "Fifth-Order Zero-Voltage Transition Boost Converter." In 2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES). IEEE, 2016. http://dx.doi.org/10.1109/icpeices.2016.7853566.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Sanders, Howard, Steven Glidden, Daniel Warnow, and Craig Dunham. "Solid state fast transition kickers for accelerator applications." In 2012 IEEE International Power Modulator and High Voltage Conference (IPMHVC). IEEE, 2012. http://dx.doi.org/10.1109/ipmhvc.2012.6518747.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Tapia, Estefania A., Jaime D. Pinzon, and Delia G. Colome. "Load Dynamic Impact on Short-Term Voltage Stability." In 2019 FISE-IEEE/CIGRE Conference - Living the energy Transition (FISE/CIGRE). IEEE, 2019. http://dx.doi.org/10.1109/fisecigre48012.2019.8985015.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Hsieh, Yao C., Te C. Hsueh, and Hau C. Yen. "A dual-boost converter with zero voltage transition." In 2008 IEEE Power Electronics Specialists Conference - PESC 2008. IEEE, 2008. http://dx.doi.org/10.1109/pesc.2008.4592010.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Jia, Zhengsen, Lei Wang, Zhiyao Liu, Hongtao Huang, and Lijuan Liu. "Transition Analysis of AC Voltage Differential Sampling System." In 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018). IEEE, 2018. http://dx.doi.org/10.1109/cpem.2018.8500860.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Palacios, Juan, and Johnny Posada. "Voltage Converters in Parallel Working as Virtual Synchronous Generators." In 2019 FISE-IEEE/CIGRE Conference - Living the energy Transition (FISE/CIGRE). IEEE, 2019. http://dx.doi.org/10.1109/fisecigre48012.2019.8984990.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Transition voltage"

1

Lee, S. Y., and J. Wei. Effect of the Induced Voltage on the Bunch Motion at the Transition Energy. Office of Scientific and Technical Information (OSTI), March 1989. http://dx.doi.org/10.2172/1119302.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Brown, Daniel L., Robert B. Lobbia, and Joseph M. Blakely. Low-Voltage Hall Thruster Mode Transitions. Fort Belvoir, VA: Defense Technical Information Center, June 2014. http://dx.doi.org/10.21236/ada611031.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Drive modelling and performance estimation of IPM motor using SVPWM and Six-step Control Strategy. SAE International, April 2021. http://dx.doi.org/10.4271/2021-01-0775.

Full text
Abstract:
This paper presents a comprehensive evaluation of the performance of an interior permanent magnet (IPM) traction motor drive, and analyses the impact of different modulation techniques. The most widely used modulation methods in traction motor drives are Space vector modulation (SVPWM), over-modulation, and six-step modulation have been implemented. A two-dimensional electromagnetic finite element model of the motor is co-simulated with a dynamic model of a field-oriented control (FOC) circuit. For accurate tuning of the current controllers, extended complex vector synchronous frame current regulators are employed. The DC-link voltage utilization, harmonics in the output waveforms, torque ripple, iron losses, and AC copper losses are calculated and compared with sinusoidal excitation. Overall, it is concluded that the selection of modulation technique is related to the operating condition and motor speed, and a smooth transition between different modulation techniques is essential to achieve a better performance.
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Transition voltage' for particular source types:
Journal articles Dissertations / Theses
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography