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Статті в журналах з теми "HYSTERESIS CURRENT"

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Filippini, Mattia, Piergiorgio Alotto, Gregor Glehn, and Kay Hameyer. "Magnetic transmission gear finite element simulation with iron pole hysteresis." Open Physics 16, no. 1 (April 18, 2018): 105–10. http://dx.doi.org/10.1515/phys-2018-0017.

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Abstract Ferromagnetic poles in a magnetic transmission gear require particular attention during their design process. Usually, during the numerical simulation of these devices the effects of hysteresis for loss estimation are neglected and considered only during post-processing calculations. Since the literature lacks hysteresis models, this paper adopts a homogenized hysteretic model able to include eddy current and hysteresis losses in 2D laminated materials for iron poles. In this article the results related to the hysteresis in a magnetic gear are presented and compared to the non-hysteretic approach.
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Locci, N., and C. Muscas. "Hysteresis and eddy currents compensation in current transformers." IEEE Transactions on Power Delivery 16, no. 2 (April 2001): 154–59. http://dx.doi.org/10.1109/61.915475.

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Bu, Wen Shao, Lei Lei Xu, Xian Bo Wang, and Xin Win Niu. "Double-Hysteresis Current Control Strategy of PWM Rectifier." Applied Mechanics and Materials 433-435 (October 2013): 1037–44. http://dx.doi.org/10.4028/www.scientific.net/amm.433-435.1037.

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to hold the merits of the traditional hysteresis controller, and at the same time, hold back the change of switching frequency and reduce the switching power loss in hysteresis control of PWM rectifier, based on the relationship between line currents and switching status, an improved algorithm of double-hysteresis current control method for three-phase voltage-type PWM converter was proposed. In the strategy, the position of reference voltage vector can be detected by double hysteresis, PLL circuit can detect the output of switching states. The proposed algorithms not only hold the merits of traditional hysteresis, such as quick current response and current limited capacity, but also, it can overcome the drawback of non-fixed switching frequency of traditional hysteresis. The algorithm has been simulated and verified by MATLAB/simulink platform, and the system operates stably.
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Aldabas, E., L. Romeral, A. Arias, and M. G. Jayne. "Improved hysteresis band current controller." Electronics Letters 37, no. 25 (2001): 1503. http://dx.doi.org/10.1049/el:20011010.

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Maher, Rami A., Walid Emar, and Jalil H. Amjad. "Adaptive hysteresis-band current controller." International Journal of Power and Energy Conversion 4, no. 4 (2013): 319. http://dx.doi.org/10.1504/ijpec.2013.057033.

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Meng, Ai Hua, Ming Fan Li, Han Lin He, and Hua Wei Ji. "Dynamic Coupling Hysteresis Model for Giant Magnetostrictive Materials." Advanced Materials Research 311-313 (August 2011): 2262–68. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.2262.

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The giant magnetostrictive material (GMM) in dynamic magnetic field has nonlinear and hysteretic characters. Based on the nonlinear constitutive model of the material, the quasi-static hysteresis model with magneto-elastic coupling was built on the Jiles-Atherton model. Considering the eddy current and anomalous losses, the hysteresis model was modified, and the dynamic coupling hysteresis model was established on the basis. Compared with the experimental data, the areas of hysteresis curves increased with frequency, and the maximum magnetostriction strain of the curves increased with prestress. The model agreed well with the experiments within the range of 500Hz.
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Vahedi, Hani, Abdolreza Sheikholeslami, Mohammad Tavakoli Bina, and Mahmood Vahedi. "Review and Simulation of Fixed and Adaptive Hysteresis Current Control Considering Switching Losses and High-Frequency Harmonics." Advances in Power Electronics 2011 (June 28, 2011): 1–6. http://dx.doi.org/10.1155/2011/397872.

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Hysteresis Current Control (HCC) is widely used due to its simplicity in implementation, fast and accurate response. However, the main issue is its variable switching frequency which leads to extraswitching losses and injecting high-frequency harmonics into the system current. To solve this problem, adaptive hysteresis current control (AHCC) has been introduced which produces hysteresis bandwidth which instantaneously results in smoother and constant switching frequency. In this paper the instantaneous power theory is used to extract the harmonic components of system current. Then fixed-band hysteresis current control is explained. Because of fixed-band variable frequency disadvantages, the adaptive hysteresis current control is explained that leads to fixing the switching frequency and reducing the high-frequency components in source current waveform. Due to these advantages of AHCC, the switching frequency and switching losses will be diminished appropriately. Some simulations are done in MATLAB/Simulink. The Fourier Transform and THD results of source and load currents and the instantaneous switching frequency diagram are discussed to prove the efficiency of this method. The Fourier Transform and THD results of source and load currents are discussed to prove the validity of this method.
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Lai, Ming-Chi, Sheng-Nan Wu, and Chin-Wei Huang. "Zingerone Modulates Neuronal Voltage-Gated Na+ and L-Type Ca2+ Currents." International Journal of Molecular Sciences 23, no. 6 (March 14, 2022): 3123. http://dx.doi.org/10.3390/ijms23063123.

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Zingerone (ZO), a nontoxic methoxyphenol, has been demonstrated to exert various important biological effects. However, its action on varying types of ionic currents and how they concert in neuronal cells remain incompletely understood. With the aid of patch clamp technology, we investigated the effects of ZO on the amplitude, gating, and hysteresis of plasmalemmal ionic currents from both pituitary tumor (GH3) cells and hippocampal (mHippoE-14) neurons. The exposure of the GH3 cells to ZO differentially diminished the peak and late components of the INa. Using a double ramp pulse, the amplitude of the INa(P) was measured, and the appearance of a hysteresis loop was observed. Moreover, ZO reversed the tefluthrin-mediated augmentation of the hysteretic strength of the INa(P) and led to a reduction in the ICa,L. As a double ramp pulse was applied, two types of voltage-dependent hysteresis loops were identified in the ICa,L, and the replacement with BaCl2-attenuated hysteresis of the ICa,L enhanced the ICa,L amplitude along with the current amplitude (i.e., the IBa). The hysteretic magnitude of the ICa,L activated by the double pulse was attenuated by ZO. The peak and late INa in the hippocampal mHippoE-14 neurons was also differentially inhibited by ZO. In addition to acting on the production of reactive oxygen species, ZO produced effects on multiple ionic currents demonstrated herein that, considered together, may significantly impact the functional activities of neuronal cells.
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Wang, En Rong, Xiao Qing Ma, S. Rakhela, and C. Y. Su. "Modelling the hysteretic characteristics of a magnetorheological fluid damper." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 217, no. 7 (July 1, 2003): 537–50. http://dx.doi.org/10.1243/095440703322114924.

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A generalized model is proposed to characterize the biviscous hysteretic force characteristics of a magnetorheological (MR) fluid damper using symmetric and asymmetric sigmoid functions on the basis of a fundamental force generation mechanism, observed qualitative trends and measured data under a wide range of control and excitation conditions. Extensive laboratory measurements were performed to characterize the hysteretic force properties of an MR damper under a wide range of magnitudes of control current and excitation conditions (frequency and stroke). The global model is realized upon formulation and integration of component functions describing the preyield hysteresis, saturated hysteresis loop, linear rise and current-induced rise. The validity of the proposed model is demonstrated by comparing the simulation results with measured data in terms of hysteretic forcedisplacement and force-velocity characteristics under a wide range of test conditions. The results revealed reasonably good agreement between the measured data and model results, irrespective of the test conditions considered. The results of the study suggest that the proposed model could be effectively applied for characterizing the damper hysteresis and for development of an optimal controller for implementation in vehicular suspension applications.
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Baranov, A. M., Yu V. Gulyaev, P. E. Zilberman, A. I. Krikunov, V. V. Kudryavtsev, Yu F. Ogrin, V. P. Sklizkova, et al. "Current hysteresis in magnetic tunnel junctions." Physics of the Solid State 43, no. 6 (June 2001): 1093–96. http://dx.doi.org/10.1134/1.1378150.

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Дисертації з теми "HYSTERESIS CURRENT"

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Sulkin, Daniel Paul. "Hysteresis in the Current Recession: Evidence and Consequences." Thesis, Boston College, 2012. http://hdl.handle.net/2345/2643.

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Thesis advisor: Robert Murphy
Hysteresis, in an economic context, is the idea that periods when the unemployment rate is greater than the natural rate have the effect of raising the underlying natural rate of unemployment (or, non-accelerating inflation rate of unemployment, NAIRU) and moving it to a new higher equilibrium state. The existence of hysteresis is still a matter of dispute in modern economics.This study examines the economic and employment situation from 1980 to the present and in particular since the beginning of the most recent recession in December 2007 and demonstrates that there exists evidence of hysteresis. It then aims to predict the economic consequences for the future and offers possible solutions to the problem.Given the scale of unemployment in the present economy and the importance of crafting an appropriate policy response, an examination of unemployment through the perspective of the hysteresis theory is a valuable approach that deserves further exploration
Thesis (BS) — Boston College, 2012
Submitted to: Boston College. Carroll School of Management
Discipline: Carroll School of Management Honors Program
Discipline: Economics
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Liu, Yingying. "Multifrequency Averaging of Hysteresis-Current-Controlled DC-DC Converters." UKnowledge, 2015. http://uknowledge.uky.edu/ece_etds/67.

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Multifrequency averaging is one of the widely used modeling and simulation techniques today for the analysis and design of power electronic systems. This technique is capable of providing the average behavior as well as the ripple behavior of power electronic systems. Hysteresis current control has fast response and internal current stability through controlling switches to maintain the current within a given hysteresis band of a given current command. However the state space variables in a hysteresis controlled system cannot be directly approached by multifrequency averaging method because of time varing switching frequency. In this thesis, a method of applying multifrequency averaging to hysteresis current controlled dc-dc converters is proposed. A dc-dc converter model with the application of this method has been successfully developed and validated both in simulation and experiment.
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White, Terence H. "A three-phase hybrid dc-ac inverter system utilizing hysteresis control." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2004. http://library.nps.navy.mil/uhtbin/hyperion/04Jun%5FWhite%5FTerence.pdf.

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Chen, Hanling. "AVERAGE-VALUE MODELING OF HYSTERESIS CURRENT CONTROL IN POWER ELECTRONICS." UKnowledge, 2015. http://uknowledge.uky.edu/ece_etds/78.

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Hysteresis current control has been widely used in power electronics with the advantages of fast dynamic response under parameter, line and load variation and ensured stability. However, a main disadvantage of hysteresis current control is the uncertain and varying switching frequency which makes it difficult to form an average-value model. The changing switching frequency and unspecified switching duty cycle make conventional average-value models based on PWM control difficult to apply directly to converters that are controlled by hysteresis current control. In this work, a new method for average-value modeling of hysteresis current control in boost converters, three-phase inverters, and brushless dc motor drives is proposed. It incorporates a slew-rate limitation on the inductor current that occurs naturally in the circuit during large system transients. This new method is compared with existing methods in terms of simulation run time and rms error. The performance is evaluated based on a variety of scenarios, and the simulation results are compared with the results of detailed models. The simulation results show that the proposed model represents the detailed model well and is faster and more accurate than existing methods. The slew-rate limitation model of hysteresis current control accurately captures the salient detail of converter performance while maintaining the computational efficiency of average-value models. Validations in hardware are also presented.
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Wu, Zhengqiu. "Nonlinear modelling of three phase multi limb transformers." Thesis, London South Bank University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.245156.

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RANJAN, SHILPA. "MINIMISATION OF TORQUE RIPPLE OF HYSTERESIS CURRENT CONTROLLED PMSM USING PI-RES CONTROLLER." Thesis, DELHI TECHNOLOGICAL UNIVERSITY, 2021. http://dspace.dtu.ac.in:8080/jspui/handle/repository/18871.

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For the better dynamic performance of PMSM & minimum ripples in torque field oriented control (FOC) is implemented. Some intricate methods are applied for controlling & for the better performance of permanent magnet synchronous machine. For highly performed motor drives flux estimation is always important. The rotor flux estimation model is designed using high pass filter (HPF) to solve the problem caused due to integrator applied in the flux estimation. Also phase locked loop (PLL) is introduced in the model. It is known PMSM is used wherever smooth torque is required. But because of some application of power electronics devices in the modelling often reveals the cogging torque that led to ripple in torque. The key drawback of PMSM is that it produces ripples in the induced torque, which are undesirable in these high-performance applications. Torque ripples led to speed oscillations, which cause PMSM servo output to worsen. The ripples in torque produces mechanical vibrations and noise in the machine that decreases the life of machine. The smoothness of torque is considered as the essential requirement for high performance of permanent magnet synchronous motors. As a consequence, the primary issue in PMSM's control problem is ripple minimization. Since many torque ripples are caused by non-ideal back EMF in stators, a number of techniques for reducing ripples caused by this phenomenon have been developed. PI controllers are generally preferred but this got affected by the variations in parameters, load condition and also on speed. To overcome this problem, a resonant controller is introduced in accordance with PI for the minimization of ripples and to get the better performance. The performance of control methods of both PI & PI-RES controller is compared.
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Najafi, M., F. Hayati, and A. Rafati. "Effect of Current Frequency and Annealing on Magnetic Properties of [Co70Fe30]97Sn3 Nanowire Arrays." Thesis, Sumy State University, 2012. http://essuir.sumdu.edu.ua/handle/123456789/35351.

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[Co70Fe30]97Sn3 alloy nanowire arrays have been fabricated by alternative current (ac) electrodeposition of Co2+, Fe2+ and Sn2+ into anodic aluminum oxide (AAO) templates. The samples were deposited at current frequency 50, 100, 200, 300, 400, 500, 800 and 1000 Hz, respectively. The structure and magnetic properties of [Co70Fe30]97Sn3 nanowire arrays dependence on different current frequency were analyzed by XRD and alternating gradient field magnetometer (AGFM). The X-ray diffraction patterns are shown an amorphous structure of the[Co70Fe30]97Sn3 nanowires. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/35351
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Block-Schachter, David. "Hysteresis and urban rail : the effects of past urban rail on current residential and travel choices." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/73697.

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Thesis (Ph. D. in Transportation)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 2012.
This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 265-284).
Cities are endowed with and accumulate assets based on their unique histories, which in turn define the choice set of the present. These assets range from the natural-sheltered ports, fertile land--to the constructed--concrete and cement, institutions and people. This dissertation examines the effects of one of these assets, urban rail, on residential location and travel behavior, from the era of horsecars and streetcars to the present in Boston. It explores the hysteretical effects of past access to rail--the extent to which the urban system retains the impacts of rail even when it no longer exists. Current density and travel behavior are measurably influenced by past access to rail. The built environment and demographic patterns are found to be the strongest mechanism for these persistent effects. Past access to rail has shaped the city, and that shape has, in turn, affected travel behavior. For density and auto ownership there is an additional measurable effect of past access unexplained by the built environment or demographic patterns. This legacy is plausibly explained by cultural effects--mnemonics--due to personal history, behavioral norms, and zoning/politics. Past access to rail has a stronger effect on density than on auto ownership. The daily choice of modes is almost entirely conditioned on current circumstances. Because places shaped by rail retain its imprint, these findings imply that there is need to consider how policy decisions will influence the city's future choice set. The greatest benefits from the endowments of urban rail are likely where redevelopment costs are low and growth potential is high--particularly light industrial areas near strong central cities. Realizing these changes requires mechanisms that allow and encourage government and private entities to be patient with the long time frames for adaptation to rail infrastructure. One such step is requiring, rather than allowing, supportive zoning and other policies within the Federal Transit Administration's New Starts capital program--including such items as increased as-of-right density, reasonable limits on parking, car sharing, and graduated drivers licensing laws. This research strengthens prior findings that similar approaches can encourage sustainable cultural norms.
by David Block-Schachter.
Ph.D.in Transportation
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Lee, Heejae. "Analysis of Current-Voltage Hysteresis and Ageing Characteristics for CH3NH3PbI3-xClxBased Perovskite Thin Film Solar Cells." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLX009/document.

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Les perovskites organiques-inorganiques en halogénures de plomb sont des matériaux très prometteurs pour la prochaine génération de cellules solaires avec des avantages intrinsèques tels que leur faible coût de fabrication (grande disponibilité des matériaux de base et leur mise en œuvre à basse température) et leur bon rendement de conversion photovoltaïque. Cependant, les cellules solaires pérovskites sont encore instables et montrent des effets d'hystérésis courant-tension délétères. Dans cette thèse, des résultats de l’analyse physique de couches minces de pérovskite à base de CH3NH3PbI3-xClx et de cellules solaires ont été présentés. Les caractéristiques de transport électrique et les processus de vieillissement ont été étudiés avec différentes approches.Dans une première étape, la synthèse du matériau pérovskite a été optimisée en contrôlant les conditions de dépôt des films en une seule étape telles que la vitesse de rotation (6000 rpm) de la tournette et la température de recuit des films (80 °C). Dans un second temps, des cellules solaires perovskites à base de CH3NH3PbI3-xClx ont été fabriquées en utilisant la structure planaire inversée et caractérisées optiquement et électriquement.Grace à l’utilisation de la spectroscopie optique à décharge luminescente (GDOES), un déplacement des ions halogénures a été observé expérimentalement et de façon directe sous l’application d’une tension électrique. Une longueur de diffusion ionique de 140 nm et un rapport de 65% d'ions mobiles ont été déduits. Il est montré que l'hystérésis courant-tension dans l'obscurité est fortement affectée par la migration des ions halogénures provoquant un écrantage substantiel du champ électrique appliqué. Nous avons donc trouvé sous obscurité un décalage de la tension à courant nul jusque 0,25 V et un courant de fuite jusque 0,1 mA / cm2 en fonction des conditions de mesure. Grâce aux courbes courant-tension en fonction de la température, nous avons déterminé la température de transition de la conductivité ions/électrons à 260K et analysé les résultats expérimentaux en utilisant l'équation de Nernst- Einstein donnant une énergie d'activation de 0.253 eV pour les ions mobiles.Enfin, le processus de vieillissement de la cellule solaire a été étudié avec des mesures optiques et électriques. Nous avons déduit que le processus de vieillissement apparaît d'abord à la surface des cristaux de pérovskite ainsi qu’aux joints de grains. Les mesures GDOES nous indiquent que les caractéristiques électriques des cellules pérovskites sont perdues par une corrosion progressive de l'électrode supérieure en argent causée par la diffusion des ions iodures
Organic-inorganic lead halide perovskites are very promising materials for the next generation of solar cells with intrinsic advantages such as a low-cost material due to the availability of source materials and low-temperature solution processing as well as a high power conversion efficiency of the sunlight. However, perovskite solar cells are still unstable and show deleterious current-voltage hysteresis effects. Inthis thesis, analyses of CH3NH3PbI3-xClx based perovskite thin films and solar cells are presented. The electrical transport characteristics and the ageing processes are investigated using different approaches.The synthesis of the halide perovskite materials is optimized in a first step by controlling the deposition conditions such as annealing temperature (80°C) and spinning rate (6000 rpm) in the one step-spin-casted process. CH3NH3PbI3-xClx based perovskite solar cells are then fabricated in the inverted planar structure and characterized optically and electrically in a second step.Direct experimental evidence of the motion of the halide ions under an applied voltage has been observed using glow discharge optical emission spectroscopy (GDOES). Ionic diffusion length of 140 nm and ratio of mobile iodide ions of 65 % have been deduced. It is shown that the current-voltage hysteresis in the dark is strongly affected by the halide migration which causes a substantial screening of the applied electric field. Thus we have found a shift of voltage at zero current (< 0.25 V) and a leakage current (< 0.1 mA/cm2) in the dark versus measurement condition. Through the current-voltage curves as a function of temperature we have identified the freezing temperature of the mobile iodides at 260K. Using the Nernst-Einstein equation we have deduced a value of 0.253 eV for the activation energy of the mobile ions.Finally, the ageing process of the solar cell has been investigated with optical and electrical measurements. We deduced that the ageing process appear at first at the perovskite grain surface and boundaries. The electrical characteristics are degraded through a deterioration of the silver top-electrode due to the diffusion of iodides toward the silver as shown by GDOES analysis
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Rezeq, Mohammed (Moh'd). "Investigation of magnetothermal and critical current hysteresis in polycrystals of low and high T(c) type II superconductors." Thesis, University of Ottawa (Canada), 2002. http://hdl.handle.net/10393/6371.

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The model of Clem and Hao and others is extended to account for the enhancement of the Meissner effect observed in single crystals of hysteretic type II superconductors upon thermal cycling below Tc in static applied magnetic fields. Predictions are made about the features of the final closed thermal hysteretis loop achievable by extensive cycling and their dependence on the temperature limits T1 and T2 < Tc chosen for the cycles. A large variety of observations, by several workers, of a narrow peak of enhanced Meissner effect near Tc in polycrystalline type II superconductors upon slow warming in static applied fields after fast field cooling, are qualitatively and quantitatively accounted for by a model where we introduced the scheme developed above for single crystals into a weak-linked intergranular network (matrix). This "two tier" framework is then extended to describe the enhancement of the Meissner effect observed by Hyun by thermal cycling of weak-linked Nb3Sn below Tc in a static field. A simple framework is presented which quantitatively develops the proposal of Evetts and Glowacki that the superposition of the applied field H a and the return field, Hr of the magnetized grains, is the cause of the hysteretic behaviour of Ic in weak-linked high T c superconductors and the occurrence of a peak in Ic versus Ha descending and reascending, after an excursion to various values, denoted Hcycle, or after field cooling in different H cool. Observations by several workers on the dependence, of the position of four categories of peaks of Ic, on Hcycle and Hcool are reproduced by this model and yield estimates of the "compression" factor C in the linear dipole approximation, H r = C Mg. We also show that, ratios of the measured plateau values for the position of these peaks, lead to an estimate for C which is independent of H·g, the penetration field into the grains, and of the model chosen to calculate the dependence of the magnetization of the grains, Mg, on Ha. Instead of the artificial pseudo-Josephson - junction expression generally used by other workers in the analysis of Ic hysteresis phenomena, we develop a family of formulae based on the critical state concept applied to idealized planar geometry. Exploiting an especially simple case from this family of formulae we reproduce a panoply of experimental curves of Ic versus Ha displayed in the literature and exhibiting a variety, of features. Analysis of the extensive data of List et al reveals that our approach leads to results in accord with observations whereas the Josephson junction format does not. (Abstract shortened by UMI.)
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Книги з теми "HYSTERESIS CURRENT"

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Duen, Ho Fat, and United States. National Aeronautics and Space Administration., eds. Modeling of metal-ferroelectric-semiconductor field effect transistors. [Washington, D.C: National Aeronautics and Space Administration, 1998.

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Duen, Ho Fat, and United States. National Aeronautics and Space Administration., eds. Modeling of metal-ferroelectric-semiconductor field effect transistors. [Washington, D.C: National Aeronautics and Space Administration, 1998.

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3

Oomes, Nienke. Network externalities and dollarization hysteresis: The case of Russia. [Washington, D.C.]: International Monetary Fund, Research Department, 2003.

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4

An Adaptive Hysteresis Band Current Controlled Shunt Active Power Filter. Hyderabad, India: ASDF International, 2017.

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5

Oomes, Nienke. Network Externalities and Dollarization Hysteresis: The Case of Russia. International Monetary Fund, 2003.

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6

Oomes, Nienke. Network Externalities and Dollarization Hysteresis: The Case of Russia. International Monetary Fund, 2003.

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Oomes, Nienke. Network Externalities and Dollarization Hysteresis: The Case of Russia. International Monetary Fund, 2003.

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8

Parametric study of power absorption from electromagnetic waves by small ferrite spheres. [Washington, DC]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Elmenzo, Marlene. HV9918 Hysteretic Buck High-Brightness LED Driver with High-Side Current Sensing. Microchip Technology Incorporated, 2019.

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Magee, Patrick, and Mark Tooley. Physics in anaesthesia. Edited by Antony R. Wilkes and Jonathan G. Hardman. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780199642045.003.0023.

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Анотація:
This chapter covers the basic science of physics relevant to anaesthetic practice. Equipment and measurement devices are covered elsewhere. Starting with fundamentals, atomic structure is introduced, followed by dimensions and units as used in science. Basic mechanics are then discussed, focusing on mass and density, force, pressure, energy, and power. The concept of linearity, hysteresis, and frequency response in physical systems is then introduced, using relevant examples, which are easy to understand. Laminar and turbulent fluid flow is then described, using flow measurement devices as applications of this theory. The concept of pressure and its measurement is then discussed in some detail, including partial pressure. Starting with the kinetic theory of gases, heat and temperature are described, along with the gas laws, critical temperature, sublimation, latent heat, vapour pressure and vaporization illustrated by the function of anaesthetic vaporizers, humidity, solubility, diffusion, osmosis, and osmotic pressure. Ultrasound and its medical applications are discussed in some detail, including Doppler and its use to measure flow. This is followed by an introduction to lasers and their medical uses. The final subject covered is electricity, starting with concepts of charge and current, voltage, energy, and power, and the role of magnetism. This is followed by a discussion of electrical circuits and the rules governing them, and bridge circuits used in measurement. The function of capacitors and inductors is then introduced, and alternating current and transformers are described.
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Частини книг з теми "HYSTERESIS CURRENT"

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Tidecks, Reinhard. "Hysteresis of the critical current." In Springer Tracts in Modern Physics, 211–44. Berlin, Heidelberg: Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/bfb0048860.

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Jiang, Wen-xue, and Kai Zhou. "An Optimized SVM-Based Hysteresis Current Controller." In Proceedings of the 6th International Asia Conference on Industrial Engineering and Management Innovation, 551–58. Paris: Atlantis Press, 2015. http://dx.doi.org/10.2991/978-94-6239-145-1_52.

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Zannella, S., L. Martini, V. Ottoboni, A. M. Ricca, and G. Ripamonti. "Hysteresis of Critical Current in YBa2Cu3O7 - x -Ag." In Physics and Materials Science of High Temperature Superconductors, 509–17. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-009-0583-2_37.

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Kumar, Pati Sushil, and Satpathy Suchismita. "Harmonics Reduction Using Active Power Filter with Hysteresis Current Control." In AI in Manufacturing and Green Technology, 139–48. First edition. | Boca Raton, FL : CRC Press, 2020. |: CRC Press, 2020. http://dx.doi.org/10.1201/9781003032465-14.

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Mukherjee, Manas, and Abhik Banerjee. "Power Quality Improvement by Active Shunt Filter with Hysteresis Current Controller." In Advances in Communication, Devices and Networking, 89–97. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-3450-4_11.

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Qian, Ping, and Yong Zhang. "Study on Hysteresis Current Control and Its Applications in Power Electronics." In Lecture Notes in Electrical Engineering, 889–95. Berlin, Heidelberg: Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-21697-8_114.

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Zheng-zhong, Li, and Gao Guo-fang. "Study of Brushless DC Motor Control System with Current Hysteresis Loop." In Lecture Notes in Electrical Engineering, 1431–37. London: Springer London, 2012. http://dx.doi.org/10.1007/978-1-4471-2386-6_191.

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Arora, Mayank, and C. Vyjayanthi. "Modified Hysteresis Current Control Implementation for Three-Phase Grid-Connected Inverter." In Recent Advances in Power Electronics and Drives, 467–79. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9239-0_35.

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Flora, A., D. Cardone, and A. Calabrese. "Modeling the hysteresis behavior of recycled rubber fiber reinforced bearings." In Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems, 324–28. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003348443-52.

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Flora, A., D. Cardone, and A. Calabrese. "Modeling the hysteresis behavior of recycled rubber fiber reinforced bearings." In Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems, 111–12. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003348450-52.

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Тези доповідей конференцій з теми "HYSTERESIS CURRENT"

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Yunbo, Long, Xu Yonghai, and Xu Yunfei. "A MMC hysteresis current control method based on current slope." In IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society. IEEE, 2017. http://dx.doi.org/10.1109/iecon.2017.8216101.

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Dwivedi, Anurag, and A. N. Tiwari. "Hysteresis current controlled three phase PWM converter." In 2016 IEEE 7th Power India International Conference (PIICON). IEEE, 2016. http://dx.doi.org/10.1109/poweri.2016.8077337.

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Touati, Zeineb, Imed Mahmoud, and Adel Khedher. "Hysteresis Current Control of Switched Reluctance Generator." In 2020 11th International Renewable Energy Congress (IREC). IEEE, 2020. http://dx.doi.org/10.1109/irec48820.2020.9310391.

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Yuan, Fei. "Current regenerative Schmitt triggers with tunable hysteresis." In 2009 52nd IEEE International Midwest Symposium on Circuits and Systems (MWSCAS). IEEE, 2009. http://dx.doi.org/10.1109/mwscas.2009.5236141.

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Gao, Yanhui, Hongyun Zhao, Yuji Gotoh, Weimin Guan, and Kazuhiro Muramatsu. "Estimation of DC Hysteresis Property Using Nonlinear Eddy Current Analysis Considering Hysteretic Property." In 2021 24th International Conference on Electrical Machines and Systems (ICEMS). IEEE, 2021. http://dx.doi.org/10.23919/icems52562.2021.9634561.

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Chen, Jiann-jong, Yuh-shyan Hwang, Wen-ta Lee, Chien-tsung Lai, and Juing-huei Su. "Hysteresis-Current-Controlled Class-D Amplifier with Active Current Sensing Techniques." In 2006 International Conference on Communications, Circuits and Systems. IEEE, 2006. http://dx.doi.org/10.1109/icccas.2006.285235.

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Channappanavar, Rajat, and Santanu Mishra. "Digital Current Hysteresis Controller Based on Wide Bandwidth Inductor Current Estimation." In 2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES). IEEE, 2018. http://dx.doi.org/10.1109/pedes.2018.8707659.

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Hota, Chitta Ranjan, and Rijil Ramchand. "Performance Comparison of Hysteresis and Fuzzy based Hysteresis Current Controlled VSI Fed IM Drives." In 2019 5th International Conference On Computing, Communication, Control And Automation (ICCUBEA). IEEE, 2019. http://dx.doi.org/10.1109/iccubea47591.2019.9129523.

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Gao, Yanhui, Taketo Shibauchi, Yuji Gotoh, Weimin Guan, and Kazuhiro Muramatsu. "Dynamic Hysteresis Calculation of Silicon Steel Considering DC Hysteresis and Anomalous Eddy Current Loss." In 2022 IEEE 20th Biennial Conference on Electromagnetic Field Computation (CEFC). IEEE, 2022. http://dx.doi.org/10.1109/cefc55061.2022.9940876.

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Prasad, Vishnu, Jayasree P R, and Sruthy V. "Hysteresis Current Controller for a micro-grid application." In 2016 International Conference on Energy Efficient Technologies for Sustainability (ICEETS). IEEE, 2016. http://dx.doi.org/10.1109/iceets.2016.7582902.

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Звіти організацій з теми "HYSTERESIS CURRENT"

1

Hodges. PR-364-09601-R02 Investigation into High Pressure DP Transmitter Calibration. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), March 2012. http://dx.doi.org/10.55274/r0010760.

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Анотація:
In many applications within the oil and gas industries, and in particular in the measurement of flow, differential pressure transmitters must operate with high accuracy and repeatability. The uncertainty of the measurement of flow varies proportionately to the uncertainty associated with the differential pressure measurement. There are many issues that arise from using differential type meters, and many of these issues are attributable to the differential pressure measurement. Issues such as turndown, linearity, repeatability, hysteresis and others are all important aspects of the differential pressure measurement. To ensure proper differential pressure measurement the oil and gas industry currently requires differential meters to be �calibrated� in the field. Several studies have shown that there are serious issues involved with performing that calibration in the field. The overall purpose of the Pipeline Research Council International, Incs (PRCI) investigation is to determine what these issues are, and how these issues can best be addressed. This is the unblinded version of the report.
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2

Hodges. PR-364-09601-R01 Investigation into High Pressure DP Transmitter Calibration. Chantilly, Virginia: Pipeline Research Council International, Inc. (PRCI), October 2012. http://dx.doi.org/10.55274/r0010001.

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Анотація:
In many applications within the oil and gas industries, and in particular in the measurement of flow, differential pressure transmitters must operate with high accuracy and repeatability. The uncertainty of the measurement of flow varies proportionately to the uncertainty associated with the differential pressure measurement. There are many issues that arise from using differential type meters, and many of these issues are attributable to the differential pressure measurement. Issues such as turndown, linearity, repeatability, hysteresis and others are all important aspects of the differential pressure measurement. To ensure proper differential pressure measurement the oil and gas industry currently requires differential meters to be �calibrated� in the field. Several studies have shown that there are serious issues involved with performing that calibration in the field. This overall purpose of the Pipeline Research Council International, Inc�s (PRCI) investigation is to determine what these issues are, and how these issues can best be addressed. PRCI has contracted Colorado Engineering Experiment Station Inc. (CEESI) to perform the investigation. The investigation consisted of two milestones, a literature review and laboratory work. The literature review covered applicable industry standards, papers, articles, and manufacturer�s specifications. The results of the literature review are included in this report. The second milestone is the laboratory work. This work was performed at the CEESI facility in Colorado during 2011. The results are included in this report.
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