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International Conference on Power engineering and Intelligent Systems, PEIS 2023

作者： Chandra, Arabindo Datta, Soumyajit Basu, Milan Chowdhuri, Sumana Department of Applied Physics University of Calcutta Kolkata India Department of Electrical Engineering Techno International Newtown Kolkata India

ISBN: (纸本)9789819972159

Vector control and self-control are the most widely used control techniques of the PM synchronous motor. Self-control technique is comparatively simple and cost-effective compared to vector control. However, this technique is unable to provide satisfactory performance for sinusoidal back E.M.F. machines. Self-control is suitable for trapezoidal back EMF motors. The vector control technique is the best high-performance control technique of sinusoidal back E.M.F. machines. In this paper, a semi-vector control scheme is discussed for sinusoidal back E.M.F. machines. The major advantage of this scheme over vector control is that reference frame transformations of motor variables and close current control are not required which makes the drive simple and less costly than vector control drive. The performance of the semi-vector control drive is in between vector control and self-control drives. The developed drive can be used for many industrial and domestic applications in place of a self-control drive. Performance of the drive is being validated by experimental study and satisfactory results are found. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd 2024.

关键词： Vectors

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electrically-pumped compact topological bulk lasers driven by band-inverted bound states in the continuum

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Light(Science & Applications) 2023年第7期12卷 1337-1345页

作者： Song Han Jieyuan Cui Yunda Chua Yongquan Zeng Liangxing Hu Mingjin Dai Fakun Wang Fangyuan Sun Song Zhu Lianhe Li Alexander Giles Davies Edmund Harold Linfield Chuan Seng Tan Yuri kivshar Qi Jie Wang Centre for Optoelectronics and Biophotonics School of Electrical and Electronic Engineering&The Photonics InstituteNanyang Technological UniversitySingaporeSingapore Electronic Information School Wuhan UniversityWuhanChina school of Electronic and Electrical Engineering University of LeedsLeedsUK Nonlinear Physics Center Research School of PhysicsAustralian National UniversityCanberraACT 2601Australia Division of Physics and Applied Physics School of Physical and Mathematical SciencesNanyang Technological UniversitySingaporeSingapore

One of the most exciting breakthroughs in physics is the concept of topology that was recently introduced to photonics,achieving robust functionalities,as manifested in the recently demonstrated topological ***,so far almost all attention was focused on lasing from topological edge *** bands that reflect the topological bulk-edge correspondence have been largely ***,we demonstrate an electrically pumped topological bulk quantum cascade laser(QCL)operating in the terahertz(THz)frequency *** addition to the band-inversion induced in-plane reflection due to topological nontrivial cavity surrounded by a trivial domain,we further illustrate the band edges of such topological bulk lasers are recognized as the bound states in the continuum(BiCs)due to their nonradiative characteristics and robust topological polarization charges in the momentum ***,the lasing modes show both in-plane and out-of-plane tight confinements in a compact laser cavity(lateral size~3λ_(laser)).Experimentally,we realize a miniaturized THz QCL that shows single-mode lasing with a side-mode suppression ratio(SMSR)around 20 *** also observe a cylindrical vector beam for the far-field emission,which is evidence for topological bulk BIC *** demonstration on miniaturization of single-mode beam-engineered THz lasers is promising for many applications including imaging,sensing,and communications.

关键词： pumped polarization lasing

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IoT-based green-smart photovoltaic system under extreme climatic conditions for sustainable energy development

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Global Energy Interconnection 2024年第6期7卷 836-856页

作者： Yufei Wang Jia-Wei Zhang Kaiji Qiang Runze Han Xing Zhou Chen Song Bin Zhang Chatchai Putson Fouad Belhora Hajjaji Abdelowahed School of Electrical Engineering Xi’an University of TechnologyXi’an 710048P.R.China School of Electrical Engineering Xi'an Jiaotong UniversityXi'an 710049P.R.China Faculty of Printing Packing Engineering and Digital Media TechnologyXi’an University of TechnologyXi’an 710054P.R.China School of Mechanical Electrical and Information EngineeringShandong UniversityWeihai 264209P.R.China Materials Physics Laboratory Department of PhysicsFaculty of SciencePrince of Songkla University(PSU)Songkhla 90112Thailand Laboratory of Engineering Sciences for Energy(LabSIPE) National School of Applied SciencesChouaib Doukkali UniversityEl Jadida 24000Morocco

To realize carbon neutrality,there is an urgent need to develop sustainable,green energy systems(especially solar energy systems)owing to the environmental friendliness of solar energy,given the substantial greenhouse gas emissions from fossil fuel-based power *** it comes to the evolution of intelligent green energy systems,Internet of Things(IoT)-based green-smart photovoltaic(PV)systems have been brought into the spotlight owing to their cutting-edge sensing and data-processing *** review is focused on three critical segments of IoT-based green-smart PV ***,the climatic parameters and sensing technologies for IoT-based PV systems under extreme weather conditions are ***,the methods for processing data from smart sensors are discussed,in order to realize health monitoring of PV systems under extreme environmental ***,the smart materials applied to sensors and the insulation materials used in PV backsheets are susceptible to aging,and these materials and their aging phenomena are highlighted in this *** review also offers new perspectives for optimizing the current international standards for green energy systems using big data from IoT-based smart sensors.

关键词： Photovoltaic systems Extreme climatic conditions Data processing Condition monitoring Smart materials

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Design and Performance Assessment of Variable Fractional Order PID controller 3

Design and Performance Assessment of Variable Fractional Ord...

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3rd IEEE applied Signal Processing Conference, ASPCON 2023

作者： Mukherjee, Nishant Sen, Kausik Chakraborty, Biswajit University of Calcutta Instrumentation Engineering Department of Applied Physics Kolkata India Jadavpur University Department of Electrical Engineering Kolkata India

ISBN: (纸本)9798350325881

This paper puts forth a new controller design of Fractional Order PID (FOPID) controllers i.e., Variable Fractional Order PID (VFOPID) controller. It has been contrived by utilizing three distinct values of λ (integral order) and μ (derivative order) considering different regions of process output. Existing control schemes like Ziegler Nichols (ZN) tuning, Fixed Set Point Weighting (FSPW) and Variable Set Point Weighting (VSPW) fail to provide satisfactory results in both, initial transient and load rejection phases. In this context, VFOPID can provide better response during both phases. The effectiveness of the proposed VFOPID controller is demonstrated by considering two different process models and their perturbed models in MATLAB simulation platform. The supremacy of the proposed controller is established by comparing the various performance indices of existing control methods and the suggested controller. From the results it is observed that, VFOPID shows excellent robust control ability under considerable perturbation which makes it superior. © 2023 IEEE.

关键词： Robust control

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Fabrication of SnSO4 transparent thin-films using simultaneous oxidation and sulfurization annealing 30

Fabrication of SnSO4 transparent thin-films using simultaneo...

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30th International Symposium on Semiconductor Manufacturing, ISSM 2024

作者： Moriya, Kento Watanabe, Daiki Ogawa, Taiki Yamaguchi, Tomohiro Aikawa, Shinya Kogakuin University Electrical and Electronic Engineering Program Tokyo Japan Kogakuin University Dept. of Electrical and Electronic Engineering Tokyo Japan Kogakuin University Dept. of Applied Physics Tokyo Japan

ISBN: (纸本)9798331510589

SnSO4 has a layered structure and is a promising candidate as a p-type transparent semiconductor with a band gap of 3.9 eV and hole effective mass of 0.88, theoretically. However, there has been no report on experimental fabrication of the semiconductor thin films. Here, we attempt trying fabrication of SnSO4 thin films and investigating their electrical properties to clarify the possibility of SnSO4 thin films as p-type transparent semiconductors. © 2024 IEEE.

关键词： Layered semiconductors

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Enhanced sensitivity via non-Hermitian topology

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Light(Science & Applications) 2025年第1期14卷 86-92页

作者： Midya Parto Christian Leefmans James Williams Robert M.Gray Alireza Marandi Department of Electrical Engineering California Institute of TechnologyPasadenaCA91125USA Physics and Informatics Laboratories NTT ResearchInc.SunnyvaleCA94085USA CREOL The College of Optics and PhotonicsUniversity of Central FloridaOrlandoFLUSA Department of Applied Physics California Institute of TechnologyPasadenaCA91125USA

Sensors are indispensable tools of modern life that are ubiquitously used in diverse settings ranging from smartphones and autonomous vehicles to the healthcare industry and space *** interfacing multiple sensors that collectively interact with the signal to be measured,one can go beyond the signal-to-noise ratios(SNR)attainable by the individual constituting *** techniques have also been implemented in the quantum regime,where a linear increase in the SNR has been achieved via using entangled *** similar lines,coupled non-Hermitian systems have provided yet additional degrees of freedom to obtain better sensors via higher-order exceptional *** recently,a new class of non-Hermitian systems,known as non-Hermitian topological sensors(NTOS)has been theoretically ***,the synergistic interplay between non-Hermiticity and topology is expected to bestow such sensors with an enhanced sensitivity that grows exponentially with the size of the sensor ***,we experimentally demonstrate NTOS using a network of photonic time-multiplexed resonators in the synthetic dimension represented by optical *** judiciously programming the delay lines in such a network,we realize the archetypal Hatano-Nelson model for our non-Hermitian topological sensing *** experimentally measured sensitivities for different lattice sizes confirm the characteristic exponential enhancement of *** show that this peculiar response arises due to the combined synergy between non-Hermiticity and topology,something that is absent in Hermitian topological *** demonstration of NTOS paves the way for realizing sensors with unprecedented sensitivities.

关键词： topology topological collective

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Minimization of Commutation Torque Ripple in BLDC Drive Using Switched Capacitor Based ZETA Converter 4

Minimization of Commutation Torque Ripple in BLDC Drive Usin...

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4th IEEE International Conference on Sustainable Energy and Future Electric Transportation, SEFET 2024

作者： Saha, Sunam Chattopadhyay, Madhurima Mukherjee, Moumita Adamas University Electrical Engineering Kolkata India Heritage Institute of Technology Applied Electronics and Instrumentation Engineering Kolkata India Adamas University Physics Department Kolkata India

ISBN: (纸本)9798350383997

This paper proposes a method for minimizing the ripple in electromagnetic torque. The primary drawback of a brushless DC motor (BLDC) that limits its precise functioning is the torque ripple produced during the commutation time. In this study, the mathematical analysis of the torque ripple in brushless DC motor on application of DC-DC converter has been conducted. Also, a theoretical analysis of the relationship between the duty ratio of the DC-DC converter with torque ripple of BLDC motor has been presented. In this work, the influence of the duty ratio and commutation time in torque ripple has been analyzed. This work aims at reducing torque ripple of BLDC motor from the view point of duty ratio of switched-capacitor (SC) based zeta converter and commutation time. © 2024 IEEE.

关键词： Brushless DC motors

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Study of a Modified Design of LVIT as Displacement Transducer with Extension of Linear Zone 4

Study of a Modified Design of LVIT as Displacement Transduce...

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4th International Conference on Computer, Communication, Control and Information Technology, C3IT 2024

作者： Mandal, Hiranmoy Saha, Sirshendu Bera, Tushar Kanti Bera, Satish Chandra Academy of Technology Department of Electrical and Electronics Engineering Hooghly712121 India National Institute of Technology Durgapur Department of Electrical Engineering Durgapur713209 India University of Calcutta Instrumentation Engineering Section Department of Applied Physics Kolkata700009 India

ISBN: (纸本)9798350389128

The conventional linear variable inductive transducer (LVIT) is typically used as a displacement transducer within a bridge-type network. However, this approach has several limitations, including a limited linear range, measurement inaccuracy due to stray capacitance effects, susceptibility to interference from electromagnetic fields, and core loss. In this work, a modified inductive design for the LVIT has been proposed to address these issues effectively. The proposed LVIT design comprises of two identical coils wound on a ferromagnetic former, which is coupled to a specifically designed movable core. The difference between the inductances of each coil and the displacement of the core are found to be linearly related. This linear relationship holds over the entire length of the former, regardless of its size, leading to an unlimited range of LVIT as displacement transducer. A modified operational amplifier-based network serves as a displacement transducer, converting the difference in inductances between the coils into an electrical signal. The mathematical analysis of this proposed network is presented in the paper. A prototype unit of the modified LVIT has been designed and put through experimental testing. The study also presents the experimental outcomes. The proposed unit exhibits linear static characteristics over the entire length of the former, confirming its effectiveness and reliability. © 2024 IEEE.

关键词： Operational amplifiers

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Sensorless BLDC Motor Tracking Control using EMRAS Controller 3

Sensorless BLDC Motor Tracking Control using EMRAS Controlle...

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3rd IEEE International Conference on Control, Instrumentation, Energy and Communication, CIEC 2024

作者： Roy, Partha Roy, Akash Ray, Susanta Jadavpur University Department of Electrical Engineering Kolkata700032 India University of Calcutta Department of Applied Physics Kolkata700009 India

ISBN: (纸本)9798350313703

The prime objective of this article is to justify a novel type of controller as Enhanced Model Reference Adaptive System (EMRAS) controller for the tracking control of sensor less BLDC motor. The application of this novel form of controller to BLDC drives is discussed in this study, along with a discussion of the key changes in the implementation with relation to speed tracking, rising time, and overshoot. Commutation of BLDC motor is accomplished by the back emf estimation method which follows zero cross detector (ZCD) to substitute the effectivity of hall sensors. The findings of simulations and experiments demonstrate that, when compared to the traditional PI control, EMRAS control produces less torque ripple and a faster tracking response with a low rising time and nearly no overshoot. © 2024 IEEE.

关键词： Simulink

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Single-bit full adder and logic gate based on synthetic antiferromagnetic bilayer skyrmions

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Rare Metals 2022年第7期41卷 2249-2258页

作者： Kai Yu Mak Jing Xia Xi-Chao Zhang Li Li Mouad Fattouhi Motohiko Ezawa Xiao-Xi Liu Yan Zhou School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China College of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610068China Department of Electrical and Computer Engineering Shinshu UniversityNagano 380-8553Japan Department of Applied Physics University of SalamancaSalamanca 37008Spain Department of Applied Physics University of TokyoTokyo 113-8656Japan

Skyrmion-based devices are promising candi-dates for non-volatile memory and low-delay time *** skyrmion-based devices execute operation by controlling skyrmion trajectory,which can be impeded by the skyrmion Hall ***,the design of skyrmion-based arithmetic devices built on synthetic antiferromag-netic(SyAF)structures is presented,where the structure can greatly suppress skyrmion Hall *** this study,the operations of skyrmion-based half adder,full adder,and XOR logic gate are executed by introducing geometric notches and tilted edges,which can annihilate or diverge *** of these skyrmion-based devices is evaluated,where the delay time and energy-delay product of the single-bit full adder are 1.95 ns and 2.50×10^(-22)Js,which are only 12%and 79%those of the previously proposed skyrmion-based single-bit full *** improvement is significant in the construction of ripple-carry adder and ripple-carry ***,our skyrmion-based SyAF arithmetic device is a promising candidate to develop high-speed spintronic devices.

关键词： Skyrmion Full adder Synthetic antiferromagnet Lowdelaytime electronics Micromagnets

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