Article
Engineering, Electrical & Electronic
Vinicius Cabral do Nascimento, Seung-Ryul Moon, Kevin Byerly, Scott D. Sudhoff, Paul R. Ohodnicki
Summary: This article presents a multi-physics design optimization paradigm that includes tuning of permeability profile for improved performance of electromagnetic devices. The method allows for determining Pareto optimal fronts consisting of optimal solutions against competing objectives, with computationally efficient analytical solutions and validation through finite-element analysis. The MATLAB 2018b software implementation is available online for further use.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Deepak Ronanki, Sheldon S. Williamson
Summary: A new, simple, and generalized approach for submodule capacitor voltage balancing in MMCs using discontinuous PWM modulation is proposed and demonstrated through simulations and experimental verification. The effectiveness of injecting ZSV components into the pulse width modulator to achieve discontinuous modulation is evaluated for different sequences over a wide range of modulation indexes.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Energy & Fuels
Luis A. M. Barros, Antonio P. Martins, Jose Gabriel Pinto
Summary: This paper presents a critical and comparative analysis of the state-of-the-art aspects of the modular multilevel converter (MLC) concept. Different power electronics converter topologies and modulation techniques are discussed and evaluated using computational simulations. The results provide insights into the symmetry of waveforms, harmonic content, and power distribution in the MLC.
Article
Engineering, Electrical & Electronic
Cheng Wang, Tao Yang, Zhenyu Wang, Serhiy Bozhko
Summary: This article discusses the common dc-bus concept in future aircraft electrical power systems. By applying a proper modulation scheme, the harmonic components generated by the ac-dc converter can be suppressed. An enhanced pulse width modulation compensation scheme is proposed to ensure the effectiveness of the proposed harmonic suppression scheme.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Automation & Control Systems
Juwon Lee, Gyu Cheol Lim, Jung-Ik Ha
Summary: This article proposes PWM methods for reducing commutation torque ripples in low inductance BLDC motor drives. Uneven current of noncommutation phase and two types of time delays in PWM contribute to the torque ripples. The proposed methods synchronize the commutation period to the switching period and minimize the time delays in the commutation and conduction regions, resulting in reduced commutation torque ripples by 27.6% compared to the conventional method.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Environmental Sciences
Bolisetti Kavya Santhoshi, Kuppusamy Mohanasundaram, Vishnu Kumar Kaliappan, Ravishankar Sathyamurthy
Summary: The paper focuses on providing an effective solution to the shortage of power in rural areas by proposing a cost-effective renewable energy system with a single-stage topology. By utilizing quasi-impedance source inverter (QZSI) and sinusoidal pulse width modulation (SPWM) techniques, the total harmonic distortion level has been significantly reduced compared to traditional inverters.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Electrical & Electronic
Shuang Xu, Bo Cao, Liuchen Chang, Riming Shao
Summary: Carrier-based pulsewidth modulation (PWM) is widely used for controlling single-phase voltage-source bridge inverters to achieve target line-frequency output voltage or current. Pulse energy modulation (PEM) technique is proposed in this article to enable the inverter to operate under both discontinuous conduction mode (DCM) and continuous conduction mode (CCM) seamlessly, showing feasibility in simulation and experimental results.
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Mohammad-Reza Tofighi, Anilchandra Attaluri
Summary: This article introduces a system combining microwave heating and infrared temperature sensor with closed-loop feedback control using pulse-width modulation for noninvasive measurement of blood flow/perfusion. A novel phantom is also introduced to create quantifiable perfusion, and the experimental results demonstrate the system's effectiveness in evaluating different perfusion levels.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2021)
Article
Engineering, Electrical & Electronic
Neerakorn Jarutus, Yuttana Kumsuwan
Summary: This paper presents the unified duty-cycle modulation (UDM) algorithm as a simplified alternative to conventional pulse width modulation (PWM) algorithms for a three-level neutral-point-clamped inverter. The UDM algorithm combines the advantages of the space-vector PWM (SVPWM) algorithm and the carrier-based PWM (CBPWM) algorithm, resulting in a simpler calculation process and improved workflow. Experimental results demonstrate the feasibility and performance of the UDM algorithm, highlighting its superiority over conventional algorithms.
AEU-INTERNATIONAL JOURNAL OF ELECTRONICS AND COMMUNICATIONS
(2023)
Article
Engineering, Electrical & Electronic
Gustavo Gonzalez, Fernando Chierchie, Fernando Gregorio, Eduardo Paolini, Juan Cousseau
Summary: This study presents the first symbol-rate baseband model of fully-digital transmitters that explicitly expresses the inter-symbol interference introduced by RF pulse-width modulation. The proposed model not only paves the way for deriving in-band performance metrics of the communication system but also allows for the evaluation of the impact of oversampling ratio, transmitted symbol statistics, and shaping pulse in the transmitter performance through an approximation of error vector magnitude. Additionally, the model offers the advantage of much shorter simulation times due to not requiring interpolation for PWM distortion appreciation.
IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY
(2021)
Article
Computer Science, Information Systems
P. Madasamy, Rajesh Verma, C. Bharatiraja, Barnabas Paul Glady J., T. Srihari, Josiah Lange Munda, Lucian Mihet-Popa
Summary: This paper primarily discusses the random PWM generation technology used in PWM inverters for industrial drives. The technique combines the traditional method of space vector PWM with the principles of random PWM to more effectively eliminate high-frequency acoustic noise.
Article
Engineering, Electrical & Electronic
Peihe Li, Anwen Shen, Qipeng Tang, Xin Luo, Jinbang Xu
Summary: This paper proposes a current fluctuation reduction strategy based on optimal three-space-vector pulse-width modulation (TSVPWM) to improve the service-life of dc-link electrolytic capacitors in two-level three-phase voltage-source inverter (VSI) system. The strategy selects required voltage vectors based on minimum dc-link electrolytic capacitor current fluctuation to achieve the minimum dc-link electrolytic capacitor current fluctuations during each switching period. Experimental results demonstrate that the proposed strategy can minimize the dc-link electrolytic capacitor current fluctuation under different working conditions.
IET ELECTRIC POWER APPLICATIONS
(2023)
Article
Automation & Control Systems
Zhaojing Wu
Summary: This paper investigates the pulse width modulation (PWM) control for Lagrange systems driven by servo motors in a stochastic environment. The principles of PWM for stochastic nonlinear systems are proven, and a continuous control bounded in probability of the stochastic Lagrange system is designed. A stochastic closed-loop nonlinear programming is modeled in the same form as that in the deterministic case. The effectiveness of the proposed scheme is demonstrated by a simulation of articulated manipulator.
Article
Engineering, Electrical & Electronic
Xiaoqiang Guo, Xiaoming Wang, Chaozhe Wang, Zhigang Lu, Changchun Hua, Frede Blaabjerg
Summary: This letter proposes two new improved pulsewidth modulation techniques for single-phase cascaded H-bridge inverter. Compared with conventional methods, the proposed techniques distribute power evenly, reduce switching losses, and improve system efficiency.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Qingzeng Yan, Langtao Xiao, Xibo Yuan, Xincheng Zhang, Cheng Yuan, Rende Zhao, Hailiang Xu
Summary: A new double-modulation-wave PWM method is proposed in this article to reduce the dependency on current polarities while retaining the characteristic of dead-time-effect elimination. This method can avoid shoot-through failure and improve system stability, with experimental verification showing its effectiveness in harmonic suppression.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Energy & Fuels
Alasmer Ibrahim, Fatih Anayi, Michael Packianather, Osama Ahmad Alomari
Summary: This paper proposes a new hybrid Machine Learning methodology for induction-motor fault detection. The experimental results have proved the superiority of this method in diagnosing faults under different load conditions.
Article
Materials Science, Multidisciplinary
Seda Kul, Fatih Anayi, Turgut Meydan
Summary: With the increasing awareness of environmental issues, the importance of noise and vibration problems is becoming more significant. The aging and lifetime of transformers are affected by the increasing non-linear loads over time. Accurate measurement and examination of mechanical parameters like vibration and noise are crucial during transformer operations. Magnetostrictive phenomenon is identified as the main contributor to transformer core vibration and noise.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Computer Science, Information Systems
Ehsan Altayef, Fatih Anayi, Michael S. Packianather, Omar Kherif
Summary: This paper experimentally simulates and analyzes the faults caused by cutting and punching of the steel used in power transformer core. The effects of these faults on transformer performance are investigated, and it is found that the transformer current increases with the number of short-circuits between laminations, which is related to the flux density and short circuit location.
Article
Energy & Fuels
Thamer A. H. Alghamdi, Fatih Anayi, Michael Packianather
Summary: This study addresses the parameter design problem of Passive Power Filters (PPFs) using the Manta Ray Foraging Optimization (MRFO) algorithm and proposes an analytical method based on Monte Carlo Simulation (MCS) to investigate the harmonic performance of optimally designed PPFs under variations in power networks. The results show that the optimally designed PPFs effectively attenuate high-order harmonics and improve system performance parameters to comply with standard limits.
Article
Energy & Fuels
Othman Abdusalam, Alasmer Ibrahim, Fatih Anayi, Michael Packianather
Summary: A novel hybrid machine learning technique was proposed for the protection of three-phase power transformers. The developed model was tested using different fault conditions and types of current signal faults, and the signals were used to develop a hybrid model. Optimal feature identification was performed using orthogonal matching pursuit and discrete wavelet transform, and bees algorithm was used to optimize the dataset. Three classification algorithms were used to distinguish normal operational conditions from faults. The model was compared to a comparable approach using genetic algorithm and evaluated based on various performance metrics. The findings suggest that the proposed model is suitable for fault identification in a range of conditions and faults.
Article
Energy & Fuels
Thamer A. H. Alghamdi, Fatih Anayi, Michael Packianather
Summary: This article develops a detailed model of a cascaded Neutral Point-Clamped (NPC)-based Medium Voltage Direct Current (MVDC) converter and investigates its harmonic analysis. By adopting an interleaved Sinusoidal Pulse-Width Modulation (SPWM) scheme, it significantly reduces harmonic distortion while ensuring control system performance.
Article
Engineering, Multidisciplinary
Thamer A. H. Alghamdi, Othman T. E. Abdusalam, Fatih Anayi, Michael Packianather
Summary: This study proposes a method based on an Artificial Neural Network (ANN) system and location-specific data to estimate the actual harmonic distortions of a solar PV inverter. By modeling and simulating a simple power system for different cases, the ANN system is trained and its prediction performance is improved. The method is validated in the IEEE 34-bus test feeder with established harmonic sources, and it achieves a maximum error of less than 10% and a maximum median of 5.4%.
AIN SHAMS ENGINEERING JOURNAL
(2023)
Article
Engineering, Manufacturing
Anh My Chu, Minh Thai Le, Ngoc Ha Hoang, Chi Hieu Le, Uyi-Osa Egbe, James Gao, Nikolay Zlatov, Michael S. Packianather
Summary: This paper presents a universal and intuitive framework and practical guidance to create CNC postprocessors for all 5-axis CNC machines, with the focus on a novel mathematical formulation of inverse kinematics of three main groups of 5-axis CNC machines. The case studies of creating CNC postprocessors with the commercially available 5-axis CNC machines were successfully demonstrated, in which the simulation scenarios and experiments were implemented to verify the created CNC postprocessors. The proposed frameworks and guides for generating CNC postprocessors can be conveniently and effectively applied in industrial practices, without the required strong backgrounds and skills for engineers or CNC operators in mathematical modeling and kinematics of machines, especially mathematical modeling of multibody systems.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE
(2023)
Article
Chemistry, Multidisciplinary
Nawaf Mohammad H. Alamri, Michael Packianather, Samuel Bigot
Summary: This paper aims to improve the performance of Deep Learning algorithms by optimizing LSTM parameters using the Bees Algorithm. It also explores the application of BA in CNN and its effectiveness in residual life prediction and classification problems.
APPLIED SCIENCES-BASEL
(2023)
Article
Energy & Fuels
Srdan Divac, Marko Rosic, Stan Zurek, Branko Koprivica, Krzysztof Chwastek, Milan Veskovic
Summary: The aim of this paper is to propose a methodology for calculating the R-L parameters of a nonlinear hysteretic inductor. The methodology is developed in the time domain based on the analysis of the instantaneous magnetising power from the inductor's hysteresis loop. The results are validated through comparison with an existing method and demonstrated on simulated cases and measured hysteresis loops.
Article
Engineering, Electrical & Electronic
Mussaab M. M. Alshbib, Mohamed Mussa Elgbaily, Ibrahim Mohd Alsofyani, Fatih Anayi
Summary: This paper presents a robust and effective method for direct torque and rotor flux control (DTRFC) strategy in an induction motor (IM). The method eliminates uncontrollable angles (UCAs) across the entire speed range. By analyzing the behavior of the DTRFC algorithm, it was found that the basic scheme had UCAs at medium and high speeds. Therefore, a special strategy with 18 sub-sectors (SSs) for medium and high speeds was proposed, while maintaining the basic 6 sectors strategy for low speed. Simulation results using MATLAB/Simulink and experimental verification using a dSPACE-based induction motor DTRFC drive system were conducted to validate the proposed method.
Proceedings Paper
Green & Sustainable Science & Technology
Theocharis Alexopoulos, Jacqueline Marsh, Gareth Llewellyn, Michael Packianather
Summary: With the rise of IoT, smart water monitoring systems have become widely used for detecting leaks and managing water supply networks. Research has shown that grouping water consumption data into hourly intervals improves user understanding and allows for the identification of usage patterns. Additionally, a new method for detecting small leaks was developed based on the unique characteristics of the pipeline used for testing. The study also proposed two new applications for the system, one for providing early notifications to individuals living alone who may require health assistance, and another for monitoring and preventing the growth of Legionella in the water supply system.
SUSTAINABLE DESIGN AND MANUFACTURING, SDM 2022
(2023)
Article
Materials Science, Multidisciplinary
Bibhutibhusan Nayak, S. Narayana Jammalamadaka
Summary: This article presents a method for remote detection of bovine serum albumin (BSA) using modified cantilever beam magnetometry (CBM). By combining a magnetostrictive Fe70Ga30 cantilever with optical detection technique, researchers were able to detect high concentrations of BSA remotely. The results of this study demonstrate the potential of this method in estimating the magnetostriction of thin films.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yu Hao, R. E. Camley, Z. Celinski
Summary: Magnetic particles have various applications and their magnetic state is determined by their size and the strength of an applied magnetic field. Numerical simulations were performed to study the effect of an applied field on the critical size of single-domain magnetic particles, and the critical field at which a particle becomes single-domain was determined.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Nitesh Singh, Naresh Kumar, Dharohar Sahadot, Anil Annadi, Vidyadhar Singh, Murtaza Bohra
Summary: The unique magnetic properties of FM/AFM and hard-FM/soft-FM nanocomposite thin films have significant relevance for numerous applications. The composition and performance of different magnetic phases in the nanocomposite films can be significantly affected by the laser ablation conditions and annealing temperature.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alya Ali Musaed, Samir Salem Al-Bawri, Khaled Aljaloud, Wazie M. Abdulkawi, Mohammad Tariqul Islam, Mandeep Jit Singh, Zaini Sakawi, Husam Hamid Ibrahim
Summary: This research presents a wideband tunable metamaterial for body-centric applications in the millimeter-wave frequency band. The proposed metamaterial has a wide operating frequency range and enhanced gain, making it suitable for improving the antenna performance in 5G wireless communication systems.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Binod K. Rai, Boris Maiorov, Krzysztof Gofryk, Patrick O'Rourke, Catherine Housley, Henry Ajo, Asraf Sawon, Arjun K. Pathak, Narayan Poudel, Qiang Zhang, Travis J. Williams, Matthias Frontzek
Summary: This manuscript reports on the structural and magnetic properties of NdCuGa3. The study confirmed the crystal structure and magnetic phase transition of NdCuGa3 using XRD, neutron diffraction, magnetization, and specific heat measurements. The neutron diffraction data further confirmed the antiferromagnetic phase of NdCuGa3.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Haonan Li, Cong Li, Hailiang Huang, Guodong Hao, Fei Wang
Summary: The electronic structure and ferroelectric-ferromagnetic coupling properties of Y-doped and vacancy-containing GaN-ZnO heterojunctions are systematically investigated. The magnetism in vacancy-containing systems is generated by the spin polarization of unpaired electrons induced by cationic vacancies, while in Y-doped systems, bound magnetic polarons are formed by the orbital hybridization of s-state and d-state electrons of Y-doped elements.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Muhammad Ijaz, Hafeez Ullah, Bandar Ali Al-Asbahi, Mati Ullah Khan, Zaheer Abbas, Sana Ullah Asif
Summary: M-type BaFe11.4-xAlxCo0.6O19 hexaferrites with Al3+ substitutions were synthesized using the co-precipitation method followed by Sonochemical process. The synthesized materials were characterized using XRD, FTIR, UV-vis spectroscopy, VSM, SEM, and LCR meter. The results showed that aluminum doping decreased the band gap and enhanced the magnetic and dielectric properties of the hexaferrites, making them suitable for various applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg I. Utesov
Summary: The elementary excitations spectrum of anisotropic frustrated antiferromagnets in the fan phase is discussed. It is found that the low-energy part of the spectrum consists of a gapless phason branch with linear dispersion and a gapped optical branch corresponding to the fan structure amplitude oscillations. In the high-energy part of the spectrum, the excitations are similar to the magnons of the fully polarized phase.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Alexander Ya. Simonovskii, Alexander A. Yanovskii, Arthur R. Zakinyan
Summary: In this study, the departure frequency of vapor bubbles during boiling of ferrofluid in a horizontal magnetic field is experimentally investigated. Two methods, visual and inductive, are used to measure the frequency of bubble departure. The results show that the bubble departure frequency can decrease with increasing magnetic field strength and increase with increasing temperature of the heat-emitting surface. A linear stability analysis is conducted to analyze the influence of the magnetic field on the frequency of bubble formation during ferrofluid boiling.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Oleg Heczko, Michal Rames, Vit Kopecky, Petr Vertat, Michal Varga, Ladislav Straka
Summary: Heusler Ni-Mn-Ga alloys are multiferroic materials that exhibit magnetic shape memory (MSM) phenomena. By doping transition elements into Ni2MnGa alloys, the transformation temperatures can be modified and complex behaviors can be observed, such as the variation in saturation magnetization and the effects of elemental substitution on compound properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Carlos Ariel Samudio Perez, Ariel Flaig de Marchi
Summary: This study investigates the electronic and magnetic properties of the Full-Heusler Fe2MnAs alloy using first-principles calculations. The alloy may form spontaneously and exhibits a ferromagnetic order and high spin-polarization. It can be transformed into a half-metal by contracting the lattice constant. Additionally, certain defects contribute to the spin-polarization of the alloy, making it a fully half-metallic material.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Satish Geeri, Aditya Kolakoti, Prasadarao Bobbili
Summary: In this study, an electromagnetic wave-absorbing material was fabricated using a polymer composite material with fiber orientation and Multiwall Carbon Nanotubes as filler materials, along with a Perfect Electric Conducting material. The experiments demonstrated strong electromagnetic absorbing properties for the composites with PEC-coated and non-PEC-coated materials. Mechanical, thermal, and morphological analysis confirmed the similar trend in properties. CRITIC analysis helped identify the sequence order of sustaining properties for the fabricated composites.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Yankai Chen, Ruoxue Zhang, Yukai An
Summary: The piezoelectricity, valley character, and magnetic properties of 2H-VS2 monolayer were studied, revealing its potential applications in spintronics and valleytronics due to its bipolar magnetic semiconductor characteristics and superior physical properties.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Leonardo S. Lima
Summary: This study investigates the thermodynamic quantities, such as entropy, specific heat, and magnetic susceptibility, in the next-nearest-neighbors Heisenberg model on a honeycomb-kagome lattice. The linear spin-wave approach is applied to obtain the temperature-dependent behavior of these quantities. Additionally, the entanglement negativity, a quantifier of quantum entanglement, and the spin Hall conductivity are also studied. The results show that all the thermodynamic quantities, as well as the entanglement negativity and spin Hall conductivity, exhibit an increasing trend with temperature. Furthermore, it is found that all the analyzed quantities approach zero in the low-temperature limit, consistent with experimental observations.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)
Article
Materials Science, Multidisciplinary
Zhaoxing Wang, Maximilian Kai Reimann, Wang Chen, Yikun Zhang, Rainer Poettgen
Summary: The Mo2FeB2-type compounds RE2Ga2Mg (RE = Tm, Er, Ho) exhibit a large magnetocaloric effect, making them promising for cryogenic magnetic cooling applications.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2024)