Artykuły w czasopismach: „HYSTERESIS CURRENT”

1

Filippini, Mattia, Piergiorgio Alotto, Gregor Glehn i Kay Hameyer. "Magnetic transmission gear finite element simulation with iron pole hysteresis". Open Physics 16, nr 1 (18.04.2018): 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., i C. Muscas. "Hysteresis and eddy currents compensation in current transformers". IEEE Transactions on Power Delivery 16, nr 2 (kwiecień 2001): 154–59. http://dx.doi.org/10.1109/61.915475.

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Bu, Wen Shao, Lei Lei Xu, Xian Bo Wang i Xin Win Niu. "Double-Hysteresis Current Control Strategy of PWM Rectifier". Applied Mechanics and Materials 433-435 (październik 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 i M. G. Jayne. "Improved hysteresis band current controller". Electronics Letters 37, nr 25 (2001): 1503. http://dx.doi.org/10.1049/el:20011010.

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Maher, Rami A., Walid Emar i Jalil H. Amjad. "Adaptive hysteresis-band current controller". International Journal of Power and Energy Conversion 4, nr 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 i Hua Wei Ji. "Dynamic Coupling Hysteresis Model for Giant Magnetostrictive Materials". Advanced Materials Research 311-313 (sierpień 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 i Mahmood Vahedi. "Review and Simulation of Fixed and Adaptive Hysteresis Current Control Considering Switching Losses and High-Frequency Harmonics". Advances in Power Electronics 2011 (28.06.2011): 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 i Chin-Wei Huang. "Zingerone Modulates Neuronal Voltage-Gated Na+ and L-Type Ca2+ Currents". International Journal of Molecular Sciences 23, nr 6 (14.03.2022): 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 i 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, nr 7 (1.07.2003): 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 i in. "Current hysteresis in magnetic tunnel junctions". Physics of the Solid State 43, nr 6 (czerwiec 2001): 1093–96. http://dx.doi.org/10.1134/1.1378150.

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Chaddah, P., K. V. Bhagwat i G. Ravikumar. "Magnetisation hysteresis and critical current density". Physica C: Superconductivity 159, nr 5 (lipiec 1989): 570–76. http://dx.doi.org/10.1016/0921-4534(89)91287-2.

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Elhaj, Murtada. "A Review on Fundamentals and Capturing Petroleum Fluid Hysteresis Through Experiments". International Journal of Petroleum Technology 10 (7.09.2023): 39–52. http://dx.doi.org/10.15377/2409-787x.2023.10.4.

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Hysteresis is proven to have a significant role in petroleum fluids and other disciplines for better understanding and evaluation. This shows a need to be explicit about precisely what is meant by the word "hysteresis." For a long time, the term hysteresis has been used and has attracted the attention of most researchers and investigators. Despite its common usage, hysteresis is used in different disciplines to mean different things. Thus, hysteresis has many definitions depending on the book or paper's area of interest. While various definitions of the term 'hysteresis' have been suggested, this paper will focus on the definition in the oil and gas industry. Hysteretic impacts petroleum fluids either positively or negatively. Therefore, accurately estimating fluid properties curves is vital in evaluating hydrocarbon recovery processes. This paper addresses and discusses a comprehensive review of the hysteresis of different petroleum fluid properties and their applications. This paper reviews many fluid properties of hysteresis and investigates them experimentally. Numerous laboratory studies in hysteresis are present in the literature and critically reviewed and highlighted in this research. This paper aims to review the experimental processes of fluid hysteresis extensively. To satisfy this aim, this paper offers insights into and explanations for experiments that have been used in fluid hysteresis. The outcomes highlight some missing concepts of the existing models and experimental processes for fluid hysteresis. Furthermore, this paper tracks the current development of hysteresis and gives insight into the future trends in the application of hysteresis.

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Gołdasz, Janusz, Bogdan Sapinski i Łukasz Jastrzębski. "Assessment of the Magnetic Hysteretic Behaviour of MR Dampers through Sensorless Measurements". Shock and Vibration 2018 (9.09.2018): 1–21. http://dx.doi.org/10.1155/2018/3740208.

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Magnetorheological (MR) dampers are well-known devices based on smart fluids. The dampers exhibit nonlinear hysteretic behaviour which affects their performance in control systems. Hence, an effective control scheme must include a hysteresis compensator. The source of hysteresis in MR dampers is twofold. First, it is due to the compressibility and inertia of the fluid. Second, magnetic hysteresis is the inherent property of ferromagnetic materials that form the control circuit of the valve including MR fluid. While the former was studied extensively over the past years using various phenomenological models, the latter has attracted less attention. In this paper, we analyze the magnetic hysteretic behaviour of three different MR dampers by investigating their current-flux relationships. Two dampers operate in flow mode, whereas the third one is a shear-mode device (brake). The approach is demonstrated using a sensorless magnetic flux estimation technique. We reveal the response of the dampers when subjected to sinusoidal inputs across a wide range of operating conditions and excitation inputs. Our observations of the flux data showed that the hysteresis is influenced by both amplitude and the frequency of the excitation input. The procedure allows to analyze the magnetic hysteresis independently of other sources of hysteresis in MR dampers; on this basis, more effective damper models and control algorithms can be developed in the future.

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Malathi, V., Dr S. Sentamil Selvan i Dr S. Meikandasivam. "Digital Hysteresis Control Algorithm for Switched Inductor Quasi Z-Source Inverter with Constant Switching Frequency". International Journal of Electrical and Electronics Research 10, nr 3 (30.09.2022): 572–78. http://dx.doi.org/10.37391/ijeer.100327.

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In this paper, a digital hysteresis current limit controller is developed for Switched Inductor Quasi Z-Source Inverter (SLQZSI). Traditional methods like hysteresis current fixed limit and adjustable hysteresis current limit techniques changes the hysteresis bandwidth in accordance to modulating frequency and gradient of reference current. The operating shifting frequency of typical approaches oscillates and crosses the intended steady shifting frequency under noise. It leads to undesirable heavy interference between the phases and more power loss. In the planned digital hysteresis current limit technique, the hysteresis current limit is calculated by resolving the optimization problem. In the proposed approach the operating shifting frequency is kept same or inferior to the intended steady shifting frequency even under noise. Hence the planned digital hysteresis current limit algorithm maintains the output current steady and power loss is minimized which is not promised by the conservative techniques. To compare different control strategies in terms of nature of operating switching frequency and harmonic performance simulations are built on the MATLAB/SIMULINK

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Du, Xuhao, Jie Pan i Andrew Guzzomi. "Modeling the Hysteresis Characteristics of Transformer Core under Various Excitation Level via On-Line Measurements". Electronics 7, nr 12 (4.12.2018): 390. http://dx.doi.org/10.3390/electronics7120390.

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In this paper, the hysteresis characteristics of a transformer core are determined from limited on-line measured voltages and currents under certain excitations. A method for calculating the magnetization curve and hysteresis loops of the transformer core under various excitation is developed based on limited excitation conditions, and using the deep neural network, support vector regressor and the Wlodarski model. The coercivity and the amplitude of magnetic field strength of hysteresis loops can be captured with high accuracy based on this method. Then, a finite element model of the transformer core is constructed to predict the distributed magnetic flux density and the excitation current using the calculated hysteresis loops. The currents from various excitation voltages on two different transformer structures are also measured to compared with simulated currents. The outcome indicates that the overall hysteresis loops and magnetization curve of the transformer core may be useful for modeling the magnetic field and excitation current under any voltage excitation.

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16

Song, Qing Shou. "A Hysteretic Current Controller for Active Power Filter (APF) with Constant Frequency". Advanced Materials Research 460 (luty 2012): 308–12. http://dx.doi.org/10.4028/www.scientific.net/amr.460.308.

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In accordance with the advantage of conventional hysteresis current control method, this paper advances a novel control method for APF. In conventional hysteresis current control, the hysteresis band (HB) is fixed and actual compensating current is limited in a fixed HB. Firstly, the connection between HB and switching frequency must be found correctly. Then, the variable hysteresis band current controller is designed according to the connection. Finally, the Matlab simulation results show that the switching frequency of VSI is held nearly constant and the proposed controller can track reference current well[1]. The problems of increasing switching losses and audible noise which happened in high-frequency state can be resolved in conventional hysteresis current control.

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GU, WEN-XIAO, MENG-LIAN ZHAO, XIAO-BO WU, MINGYANG CHEN i QING LIU. "A HIGH-PRECISION ULTRA-LOW-POWER HYSTERETIC VOLTAGE DETECTOR USING CURRENT-BASED COMPARISON". Journal of Circuits, Systems and Computers 22, nr 09 (październik 2013): 1340005. http://dx.doi.org/10.1142/s0218126613400057.

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This paper presented a high-precision, ultra-low-power hysteretic voltage detector (HVD) using current comparison to detect voltage default crossing moments for energy-harvesting systems (EHS) in wireless sensor network (WSN) applications. The HVD mainly consists of four parts: a specially designed voltage-to-current converter (VCC) with thermal stability improvement, a comparison core to make current-based comparison, a current pre-amplifier to improve its transient performance and a Schmitt inverter to provide the hysteresis characteristic. The prototype of this HVD has been implemented in SMIC 0.18 μm CMOS process and occupies 0.036 mm2 area without pads. The hysteresis window is about 120 mV wide. The temperature coefficient (TC) is about -170.2 ppm°C. The average variation to different process corners can be reduced to 1.4% by MOSFET and resistor trimming. The total power consumption is only 701.5 nW when VDD is around 1.8 V.

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Liu, Yu-Ping, Kang-Zhi Liu i Xiaofeng Yang. "Nonlinear Current Control for Reluctance Actuator with Hysteresis Compensation". Journal of Control Science and Engineering 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/150345.

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The next-generation fine stage of the wafer scanner needs a suitable actuator to meet the requirements of high speed, high acceleration, and high precision. The voice coil actuator is no longer the best choice because of its large size and the heat dissipation is difficult to solve. The reluctance actuator can provide a big force based on a unique property of small volume and low current, making it a very suitable candidate. But the strong nonlinearity such as the hysteresis between the current and force limits the reluctance actuator applications in nanometer positioning. This paper proposes a nonlinear current control configuration with hysteresis compensation using the adaptive multilayer neural network. Simulation results show that the hysteresis compensator is effective in overcoming the hysteresis and is promising in precision control applications.

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Mohapatra, Bhabasis, Binod Kumar Sahu, Swagat Pati, Mohit Bajaj, Vojtech Blazek, Lukas Prokop, Stanislav Misak i Mosleh Alharthi. "Real-Time Validation of a Novel IAOA Technique-Based Offset Hysteresis Band Current Controller for Grid-Tied Photovoltaic System". Energies 15, nr 23 (22.11.2022): 8790. http://dx.doi.org/10.3390/en15238790.

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Renewable energy sources have power quality and stability issues despite having vast benefits when integrated with the utility grid. High currents and voltages are introduced during the disconnection or injection from or into the power system. Due to excessive inverter switching frequencies, distorted voltage waveforms and high distortions in the output current may be observed. Hence, advancing intelligent and robust optimization techniques along with advanced controllers is the need of the hour. Therefore, this article presents an improved arithmetic optimization algorithm and an offset hysteresis band current controller. Conventional hysteresis band current controllers (CHCCs) offer substantial advantages such as fast dynamic response, over-current, and robustness in response to impedance variations, but they suffer from variable switching frequency. The offset hysteresis band current controller utilizes the zero-crossing time of the current error for calculating the lower/upper hysteresis bands after the measurement of half of the error current period. The duty cycle and hysteresis bands are considered as design variables and are optimally designed by minimizing the current error and the switching frequency. It is observed that the proposed controller yields a minimum average switching frequency of 2.33 kHz and minimum average switching losses of 9.07 W in comparison to other suggested controllers. Results are validated using MATLAB/Simulink environment followed by real-time simulator OPAL-RT 4510.

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Danilin, A. N., i A. D. Shalashilin. "Hysteresis Modelling of Mechanical Systems at Nonstationary Vibrations". Mathematical Problems in Engineering 2018 (2018): 1–15. http://dx.doi.org/10.1155/2018/7102796.

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This paper considers and reviews a number of known phenomenological models, used to describe hysteretic effects of various natures. Such models consider hysteresis system as a “black box” with experimentally known input and output, related via formal mathematical dependence to parameters obtained from the best fit to experimental data. In particular, we focus on the broadly used Bouc-Wen and similar phenomenological models. The current paper shows the conditions which the Bouc-Wen model must meet. An alternative mathematical model is suggested where the force and kinematic parameters are related by a first-order differential equation. In contrast to the Bouc-Wen model, the right hand side is a polynomial with two variables representing hysteresis trajectories in the process diagram. This approach ensures correct asymptotic approximation of the solution to the enclosing hysteresis cycle curves. The coefficients in the right side are also determined experimentally from the hysteresis cycle data during stable oscillations. The proposed approach allows us to describe hysteretic trajectory with an arbitrary starting point within the enclosed cycle using only one differential equation. The model is applied to the description of forced vibrations of a low-frequency pendulum damper.

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Liu, Yu Ping, Zhi Kang Liu i Xiao Feng Yang. "Hysteresis Compensation Control for a Current-Driven Reluctance Actuator Using the Adaptive MNN". Applied Mechanics and Materials 643 (wrzesień 2014): 60–65. http://dx.doi.org/10.4028/www.scientific.net/amm.643.60.

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The next-generation semiconductor lithography equipment needs a suitable actuator to meet the requirement of high-speed, high-acceleration and high-precision. Reluctance actuator, which has a unique property of small volume, low current and can produce great force, is a very suitable choice. One of the major application challenges of reluctance actuator is the hysteresis of the force, which has a nonlinear relationship with respect to the current and is directly related to the final accuracy in the nanometer range. Therefore, it is necessary to study the control method for the hysteresis in reluctance force. This paper proposes a hysteresis control configuration for the current-driven variable reluctance actuator with hysteresis using the adaptive multilayer neural network (MNN), which is used as a learning machine of hysteresis. The simulation results show that the proposed method is effective in overcoming the hysteresis.

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Gu, Wei, Lihui Zhang, Junkai Xie, Guangnan Shi, Haibo Zhang, Quanqing Yu i Honglin Zhu. "A Current Amplifier Circuit and Control Strategy Based on FPGA". Journal of Physics: Conference Series 2095, nr 1 (1.11.2021): 012008. http://dx.doi.org/10.1088/1742-6596/2095/1/012008.

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Abstract With the extensive application of electric vehicles, energy storage systems and other power electronic equipment, the research on large capacity controllable current source will be an important direction in the future. This paper proposes controllable current source controlled by a full digitally hysteresis current based on field programmable gate array(FPGA), in which the single phase full bridge topology is adopted as the main circuit of current source. The two levels and three levels hysteresis current control strategies are analyzed and compared with the platform of PSCAD/EMTDC. The user defined component was adopted to realize the two difference control strategies with fortran language program. The simulation results verified that the two levels hysteresis current control strategy is much more fit for the controllable current source. Finally, a prototype is designed and fulfilled and it is controlled by the digitally controller with FPGA. The hysteresis current control is realized by FPGA controller with VHDL programming. The experimental results show that the researched hysteresis current control technology is effective for the current amplifier

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Xia, Yang, Hai Liang Tao i Ning Zhang. "An Adaptive Hysteresis Band Controller for Single Phase PV Inverters". Advanced Materials Research 354-355 (październik 2011): 1333–37. http://dx.doi.org/10.4028/www.scientific.net/amr.354-355.1333.

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Hysteresis current controllers are widely used in PV inverters. The main drawback of conventional hysteresis current control is that the switching frequency is variable, as the hysteresis band is fixed. In this paper an adaptive band hysteresis control algorithm with no derivative calculation is presented. As it will be shown, this algorithm can limit the switching frequency variation within a small range and the algorithm itself is simple and easy to be implemented. The performance of this algorithm, together with the one [10] and conventional hysteresis control has been evaluated by means of simulations performed with PSIM and SIMULINK. Simulation results show the effectiveness of the suggested hysteresis current controller.

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Kazantzi, Athanasia K., i Dimitrios Vamvatsikos. "The Hysteretic Energy as a Performance Measure in Analytical Studies". Earthquake Spectra 34, nr 2 (maj 2018): 719–39. http://dx.doi.org/10.1193/112816eqs207m.

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Hysteretic energy dissipation is often employed as a measure of performance for systems subjected to earthquake excitation. This mainly stems from quasi-static cyclic tests where fuller hysteresis loops (i.e., higher energy absorption) are taken to indicate better performance when comparing systems with similar strength under the same cyclic loading protocol. However, seismic loading offers a different proving ground, where energy absorption is strongly correlated with energy input, while the nonstationary loads imply that the beneficial hysteretic effects observed in a cyclic test may never be realized. Given the current state of art in models and methods of performance-based earthquake engineering, we ask whether earthquake records at a given seismic intensity will cause peak/residual displacements or accelerations that favor models having fuller hysteresis. Using incremental dynamic analysis on story-level oscillators with varying hysteretic characteristics, it is demonstrated that hysteretic energy dissipation does not consistently correlate with seismic performance.

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Rajini, V. "Investigations on Hysteresis-Based Current Control Techniques for Grid Connected Photovoltaic Systems". Journal of Engineering Research [TJER] 12, nr 1 (1.12.2014): 32. http://dx.doi.org/10.24200/tjer.vol12iss1pp32-43.

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This paper focuses on delivering an effective performance qualification (PQ) control strategy for a grid connected photovoltaic (PV) system. A PV-based distributed generation system with a capacity of 10 kilo volt amps (kVA) was connected to the utility side of a power grid operating at 415 V. The power grid was modelled with a capacity of 100 kVA, 11 kV, and 100 km transmission line length. The PQ control strategy was implemented with three hysteresis-based current control techniques. To overcome the drawbacks of conventional hysteresis-control techniques, adaptive tuning of the hysteresis band was carried out, and a vector-based hysteresis current control is proposed to improve the results.

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Sabaghi, Masoud, Mohsen Dashtbayazi i Saeid Marjani. "Dynamic Hysteresis Band Fixed Frequency Current Control". World Applied Programming 6, nr 1 (1.03.2016): 1–4. http://dx.doi.org/10.21828/wap-06-01-001.

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Sabaghi, Masoud, Mohsen Dashtbayazi i Saeid Marjani. "Dynamic Hysteresis Band Fixed Frequency Current Control". World Applied Programming 6, nr 1 (1.03.2016): 1–4. http://dx.doi.org/10.21828/wap0601.001.

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Hsu, Daniel, J. G. Lin i W. F. Wu. "Low-current-induced electrical hysteresis in Nd0.7Ca0.3MnO3". Applied Physics Letters 88, nr 22 (29.05.2006): 222507. http://dx.doi.org/10.1063/1.2208379.

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Buso, S., S. Fasolo, L. Malesani i P. Mattavelli. "A dead-beat adaptive hysteresis current control". IEEE Transactions on Industry Applications 36, nr 4 (2000): 1174–80. http://dx.doi.org/10.1109/28.855976.

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Bong-Hwan Kwon, Tae-Woo Kim i Jang-Hyoun Youm. "A novel SVM-based hysteresis current controller". IEEE Transactions on Power Electronics 13, nr 2 (marzec 1998): 297–307. http://dx.doi.org/10.1109/63.662844.

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Mayergoyz, I. D. "Eddy current hysteresis and the Preisach model". IEEE Transactions on Magnetics 34, nr 4 (lipiec 1998): 1261–63. http://dx.doi.org/10.1109/20.706515.

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Aldabas, E., L. Romeral, A. Arias i M. G. Jayne. "Software-based digital hysteresis-band current controller". IEE Proceedings - Electric Power Applications 153, nr 2 (2006): 184. http://dx.doi.org/10.1049/ip-epa:20045156.

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Diep, Bao Tri, N. Y. P. Vo i Thanh Danh Le. "Hysteresis Identification of Bidirectional Magneto-Rheological Actuators Employing Preisach Model". Applied Mechanics and Materials 889 (marzec 2019): 355–60. http://dx.doi.org/10.4028/www.scientific.net/amm.889.355.

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As known, the aim of this paper is to present the field hysteresis behavior of a BMR actuator via identifying the hysteresis model. In order to realize this purpose, firstly, a BMR actuator is manufactured. The feature of this actuator has two disks which are rotated in opposite direction at the same speed and two coils are placed directly on each side of the housing. The two input signals consisting of velocity and current are applied to the BMR actuator to investigate the characteristic of this actuator. Secondly, a proper Preisach hysteresis model is built with two inputs and one output to estimate the torque of the actuator. Finally, the accuracy and the effectiveness of the model are demonstrated by the errors comparison between the constructed hysteretic curves and the experimental ones

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Guo, Pengfei, Jing Xie i Xinchun Guan. "Dynamic Model of MR Dampers Based on a Hysteretic Magnetic Circuit". Shock and Vibration 2018 (2018): 1–13. http://dx.doi.org/10.1155/2018/2784950.

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As a key to understand dynamic performances of MR dampers, a comprehensive dynamic magnetic circuit model is proposed in this work on the basis of Ampere’s and Gauss’s laws. It takes into account not only the magnetic saturation, which many existing studies have focused on, but also the magnetic hysteresis and eddy currents in a MR damper. The hysteresis of steel parts of MR dampers is described by Jiles-Atherton (J-A) models, and the eddy current is included based on the field separation. Compared with the FEM results, the proposed model is validated in low- and high-frequency studies for the predictions of the magnetic saturation, the hysteresis, and the effect of eddy currents. A simple multiphysics model is developed to demonstrate how to combine the proposed magnetic circuit model with the commonly used Bingham fluid model. The damping force in the high-frequency case obviously lags behind the coil current, which exhibits a hysteresis loop in the current-force plane. The lag of damping force even exists in a low-frequency varying magnetic field and becomes more severe in the presence of eddy currents.

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35

Nguyen-Van, Triet, Rikiya Abe i Kenji Tanaka. "Digital Adaptive Hysteresis Current Control for Multi-Functional Inverters". Energies 11, nr 9 (13.09.2018): 2422. http://dx.doi.org/10.3390/en11092422.

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This paper proposes a digital adaptive hysteresis current control method for multi-functional inverters in a power-flow control device called digital grid router. Each inverter can be controlled in master, grid-connected, or stand-alone modes, which can be specified by the controller. While the popular linear sine-triangle pulse width modulation (SPWM) control technique requires complicated proportional-integral (PI) regulators with an unavoidable time delay, hysteresis current control has a simple structure, fast responses, and robustness due to its independent system of parameters. Since the hysteresis current control method controls the output current stay around the reference current directly, in the multi-functional inverter, the reference output is not given by a current directly. Thus, the reference current used to implement the hysteresis current control in this study is calculated from the given reference voltage or power in each control mode. The controller uses high-speed sampled data at MHz level and is implemented by using a field-programmable gate array (FPGA). Experimental results show good performances of the proposed controller in controlling power exchanges in the digital grid router.

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Zhang, Yong Hua, Jian Sheng Zhang i Peng Fei Song. "Research on Effect of Harmonics to Hysteresis Current Tracking Control Performance". Applied Mechanics and Materials 427-429 (wrzesień 2013): 1150–53. http://dx.doi.org/10.4028/www.scientific.net/amm.427-429.1150.

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A simulation model was built based on the Simulink module in the Matlab to study the effect of DC power harmonics to hysteresis current control performance. The DC power supply in the hysteresis current control circuit was obtained by a three-phase rectifier circuit, and the harmonics of DC power supply vary with the value of the capacitor which was in parallel to the rectifier circuit output. The result of experiment shows that the harmonics cause the inverter output waveform distortion, even cause hysteresis current control tracking failure.

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Lim, An Eng, i Shireen Goh. "Effect of Microchannel Diameter on Electroosmotic Flow Hysteresis". Energies 16, nr 5 (23.02.2023): 2154. http://dx.doi.org/10.3390/en16052154.

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Electroosmotic flow (EOF) commonly involves inhomogeneous fluids in practical applications. EOF hysteresis, which is defined as direction-dependent flow behavior, has been extensively investigated for dissimilar solution pair systems. Hitherto, there is no investigation being conducted to examine the effect of microchannel diameter on the hysteresis phenomenon. In this investigation, current monitoring experiments and finite element numerical simulations were performed to examine the intensification of the hysteretic behavior with reduction in the microchannel diameter. Three solution pairs were selected for the study, namely KCl–NaCl (dissimilar ionic species with similar concentration), NaCl and KCl (similar ionic species but different concentrations) solution pairs, with microchannels of 5 μm and 100 μm internal diameters. EOF hysteresis augmentation for reduced channel diameter (i.e., 5 μm microchannel) is due to the coupling effect of the resultant wider/tighter interfacial width and the minority pH-governing ion-driven hysteresis, which was earlier discovered to be the origin of EOF hysteresis. This investigation provides an appropriate understanding of the channel dimensional effect on EOF behavior involving multiple fluids, and the outcomes can potentially be implemented on chemical and biological microfluidic systems with adjustable throughput.

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38

Kalyanraj, D., i S. Lenin Prakash. "Design and Digital Implementation of Constant Frequency Hysteresis Current Controller for Three-Phase Voltage Source Inverter Using TMS320F2812". International Journal of Emerging Electric Power Systems 15, nr 1 (18.01.2014): 13–23. http://dx.doi.org/10.1515/ijeeps-2013-0141.

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Abstract A constant frequency hysteresis current control technique for a three-phase voltage source inverter (VSI) has been developed for AC drives, power quality and renewable energy applications. This paper presents a digital implementation of a constant frequency hysteresis current control technique for a three-phase VSI feeding an inductive load, using digital signal controller TMS320F2812. The limitations of variable frequency hysteresis control have been discussed and overcoming these limitations by means of digital implementation has been proposed. The complete design procedure of the proposed technique has been presented with an illustrative example. The three-phase VSI feeding an inductive load has also been simulated by using MATLAB and the simulation results have been presented. The hardware results of hysteresis current controlled three-phase VSI feeding an inductive load have been presented. Also the performance analysis of the hysteresis current controller has been presented. Operation of this controller has also been explained with a help of phase plane trajectory of hysteresis controller.

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Yang, Min Sheng, i Si Guo Zhu. "A New Modulation Method Based on Current Hysteresis Control for Cascaded H-Bridge Inverter". Advanced Materials Research 588-589 (listopad 2012): 393–96. http://dx.doi.org/10.4028/www.scientific.net/amr.588-589.393.

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This paper puts forward a current hysteresis control method suitable for cascaded H-bridge inverter. It has the following characteristics : The control method is similar to unipolar SPWM modulation for a single H bridge.It is simple for pulse generator and can effectively reduce the switching losses; The phase-shifted control pulse for multi H bridges of a phase with current hysteresis control can be generated which is similar to the phase shift SPWM by dynamically adjusting the width of hysteresis to keep power device switching frequency constant; It retains fast response, internal current limiting and with good stability for current hysteresis control.At last, the experimental results verify the correctness of the proposed method.

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Li, Shan Hong, Li Jun Li, De Ren Li i Zhi Chao Lu. "Core Losses Separation of Amorphous Alloy Core". Materials Science Forum 849 (marzec 2016): 91–94. http://dx.doi.org/10.4028/www.scientific.net/msf.849.91.

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In this paper, the core losses of Fe80Si9B11, Fe78Si9B13 amorphous alloy cores were separated to investigate the behaviors of hysteresis loss, eddy current loss and additional loss in high frequency range. The results showed that the losses of amorphous alloy core were mainly composed of hysteresis loss in low frequency. With the increase of frequency, eddy current loss increased drastically compared with the hysteresis loss, the eddy current loss was greater than the hysteresis loss when the frequency was higher than 5 kHz and 6 kHz for amorphous alloy with the composition of Fe78Si9B13 and Fe80Si9B11, respectively. The eddy current loss proportion in total loss increased with the increment of frequency.

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41

Jiang, Gui Xiu, i Shu Jie. "The Application of BP Algorithm in Electronic Load Current Control". Advanced Materials Research 846-847 (listopad 2013): 185–89. http://dx.doi.org/10.4028/www.scientific.net/amr.846-847.185.

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The current control method based on double hysteresis current control and space vector is taken, so that the current tracing control of three phase VSR can realized. The predictive current control based on BP algorithm is presented, and the drawback that there is beat during the control of SVPWM based on hysteresis can be made up, which has serious influence on the current tracing when the difference value changed violently. Without the rise of sampling frequency, the reference offset current of next time is predicted using of historical current. The simulation results show that the predictive current control based on BP algorithm is correct and valid. The deadbeat control of SVPWM based on hysteresis is realized, less harmonic current and better tracing are got.

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Kiran, Nagulapati. "Indirect Vector Control of Three Phase Induction Motor using PSIM". Bulletin of Electrical Engineering and Informatics 3, nr 1 (1.03.2014): 15–24. http://dx.doi.org/10.11591/eei.v3i1.181.

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This paper presents the implementation of indirect vector control of three phase Induction Motor using Hysteresis Band PWM current control and Synchronous Current Control in PSIM environment. In any machine drive system, current control directly influences both flux and torque developed directly. In Hysteresis current control method, actual current tracks the command current within a hysteresis band. There is no difficulty in current control tracking when CEMF is low, but at higher speeds, current controller gets saturated due to higher CEMF and hense becomes difficult to track due to which there will be a phase lag with respect to command current. All such problems are solved using Synchronous Current Control.

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43

Li, Xin Xin, i Wei Zhou. "New Dynamic Jiles-Atherton Hysteresis Model for Giant Magnetostrictive Material". Key Engineering Materials 474-476 (kwiecień 2011): 704–8. http://dx.doi.org/10.4028/www.scientific.net/kem.474-476.704.

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To set-up a rate-dependent dynamic hysteresis model, eddy current loss in giant magnetostrictive material is represented by the loss in eddy current impedance. By combining static Jiles-Atherton hysteresis model, the equivalent circuit of giant magnetostrictive material is built, the relationship between eddy current impedance and magnetic field and magnetization is derived and the maximum eddy current impedance of the material is clculated. Effective magnetic permeability is applied to estimate the eddy current impedance as exciting rate or frequency gets high. Simulation and experiment results of exciting frequencies at 5Hz,10Hz,20Hz, are compared, showing experiment results are coincident with simulation ones, in term of magnitude order and tilt direction. It is demonstrated that effective permeability is feasible for eddy current impedance estimation and eddy current impedance-based dynamic Jiles-Atherton hysteresis model is able to reflect practical dynamic hysteresis.

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Sankar, R. S. Ravi, A. Venkatesh i Deepika Kollipara. "Adaptive hysteresis band current control of grid connected PV inverter". International Journal of Electrical and Computer Engineering (IJECE) 11, nr 4 (1.08.2021): 2856. http://dx.doi.org/10.11591/ijece.v11i4.pp2856-2863.

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In this paper, adaptive hysteresis band current controller is implemented to control the current injected into the grid. Initially it was implemented by B.K Bose for control of the machine drive. Now it is implemented for the grid connected PV inverter, to control the current injected into Grid. It is well suitable for the distribution generation. The adaptive hysteresis band controller changes the bandwidth based on the modulating frequency, supply voltage, input DC voltage and slope of the reference current. Consequently, the controller generates pulses to the inverter. It is advantageous over the conventional hysteresis controller, as the switching frequency is maintained almost constant. Thereby quality of grid current is also improved. It is verified in time domain analysis of simulation using MATLAB.

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45

Wijewardena, U. Kushan, Tharanga Nanayakkara, Rasanga Samaraweera, Sajith Withanage, Annika Kriisa i Ramesh G. Mani. "Effects of Long-Time Current Annealing to the Hysteresis in CVD Graphene on SiO2". MRS Advances 4, nr 61-62 (2019): 3319–26. http://dx.doi.org/10.1557/adv.2019.366.

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ABSTRACTGraphene specimens produced by chemical vapor deposition usually show p-type characteristics and significant hysteresis in ambient conditions. Among many methods, current annealing appears to be a better way of cleaning the sample due to the possibility of in-situ annealing in the measurement setup. However, long-time current annealing could increase defects in the underlying substrate. Studying the hysteresis with different anneal currents in a graphene device is, therefore, a topic of interest. In this experimental work, we investigate electron/hole transport in a graphene sample in the form of a Hall bar device with a back gate, where the graphene was prepared using chemical vapor deposition on copper foils. We study the hysteresis before and after current annealing the sample by cooling down to a temperature of 35 Kfrom room temperature with a back-gate bias in a closed cycle refrigerator.

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Li, Yutao, Liliang Wang, Hao Yu, Jiayi An, Yan Pei i Zheng Qian. "A Dynamic Hysteresis Model for TMR-Current Sensors Based on Probability Estimation of Hysteresis Operator and Its Switching Time". Applied Sciences 12, nr 10 (14.05.2022): 4985. http://dx.doi.org/10.3390/app12104985.

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Hysteresis is one of the main factors affecting the measurement accuracy of TMR sensors, especially in dynamic measurements. The commonly used Preisach hysteresis compensation model has some problems, such as complex modeling and difficulty in accurately measuring the step time, resulting in low accuracy in dynamic measurements. In this paper, considering the distribution characteristics of the conversion time of the hysteresis operator in dynamic measurements, a dynamic hysteresis model based on the probability estimation of the hysteresis operator and its conversion time is proposed. Compared with the existing methods, this method only needs to calculate the distribution of the sensor hysteresis operator to realize the calculation of hysteresis characteristics without a physical model or fitting algorithm. It has good generalization performance and a corresponding fast speed. In the test of two typical TMR sensors, compared with the transmission Preisach model, the maximum error of this method is reduced by 46.7%, the variance can be reduced by 90.2%, and the average value can be reduced by 65.1%.

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KIM, K., K. K. D. RATHNAYAKA, I. F. LYUKSYUTOV i D. G. NAUGLE. "SUPERCONDUCTING FILM WITH AN ARRAY OF MAGNETIC NANOSTRIPES". International Journal of Modern Physics B 27, nr 15 (4.06.2013): 1362020. http://dx.doi.org/10.1142/s0217979213620208.

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We present studies of the transport properties of a Sn superconducting film with an array of parallel nickel magnetic nanostripes (800 nm period) deposited on top of a germanium insulating layer covering the Sn film surface. The critical current parallel to the stripes is larger than the critical current perpendicular to the stripes. Both critical currents demonstrate strong hysteresis and matching field effects. We have observed strong hysteresis in the resistance dependence on the magnetic field.

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Tunç, Serhat, i Fedai Inanir. "Magnetic Hysteresis Loss Calculations of HTS Coil under Rotating Magnetic Fields". Materials Science Forum 915 (marzec 2018): 83–89. http://dx.doi.org/10.4028/www.scientific.net/msf.915.83.

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We calculate magnetic hysteresis loss of HTS coil under rotating magnetic field. No transport current through the coil is assumed other than induced current. In order to find the frequency and applied field direction dependence of the loss, we present the loss versus applied field amplitude curves, for the frequencies f=1, 10, 100 and 1000 Hz, for seven different orientations of magnetic field. The hysteretic loss through the SC component increases with increasing frequency. This behavior is a consequence of higher field penetration to the tape at higher frequencies.

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Naik, Amiya, Anup Kumar Panda i Sanjeeb Kumar Kar. "Improving the Dynamic Response during Field Weakening Control of IPMSM Drive System using Adaptive Hysteresis Current Control Technique". International Journal of Emerging Electric Power Systems 17, nr 3 (1.06.2016): 235–49. http://dx.doi.org/10.1515/ijeeps-2015-0078.

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Abstract This paper presents the control of IPMSM drive in flux weakening region, for high speed applications. An adaptive hysteresis band current controller has been designed and implemented in this work to overcome the drawbacks which are present in case of conventional hysteresis band current controllers such as: high torque ripple, more current error, large variation in switching frequency etc. The proposed current controller is a hysteresis controller in which the hysteresis band is programmed as a function of variation of motor speed and load current. Any variation in those parameters causes an appropriate change in the band which in turns reduces the torque ripple as well as current error of the machine. The proposed scheme is modeled and tested in the MATLAB-Simulink environment for the effectiveness of the study. Further, the result is validated experimentally by using TMS320F2812 digital signal processor.

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Asllani, Besar, Alberto Castellazzi, Dominique Planson i Hervé Morel. "Subthreshold Drain Current Hysteresis of Planar SiC MOSFETs". Materials Science Forum 963 (lipiec 2019): 184–88. http://dx.doi.org/10.4028/www.scientific.net/msf.963.184.

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V TH instabilities of SiC MOSFET are made of a permanent and a recoverable part. VTH hysteresis is a recoverable instability which affects the operation of the device since the threshold voltage depends on the negative bias applied previously. In this paper, the phenomenon is assessed through experiments and TCAD simulation. The results are in good agreement and show that the VTH hysteresis is mainly caused by the hole trapping in the oxide near the interface. The C(V) characteristics of the measured device is similar to the simulated device having a concentration of 1012 holes/cm2 trapped at the interface.

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