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IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Chun-Hsin Chang Hwa-Dong Liu Chang-Hua Lin Rashid Ahmed Khan Yi-Jie Zeng Undergraduate Program of Vehicle and Energy Engineering National Taiwan Normal University Taipei City Taiwan Department of Electrical Engineering National Taiwan University of Science and Technology Taipei City Taiwan Graduate Institute of Green Energy and Sustainable Technology National Taiwan Normal University Taipei City Taiwan

ISBN: (数字)9798350351156

ISBN: (纸本)9798350351163

This study introduces an innovative high step-up (HSU) converter designed for solar photovoltaic systems equipped with a maximum power point (MPP) tracker. This converter efficiently increases the output voltage while maintaining low voltage stress on its components, thanks to a novel combination of primary boost cells, switched capacitors, and voltage multiplier cells. A clamping circuit minimizes leakage energy, enhancing overall efficiency. Testing of a prototype confirmed its effective MPP tracking and high efficiency, with a conversion rate of 20 V-40 V to 380 V at 150 W and efficiencies between 90 % and 96 %.

关键词： Photovoltaic systems Electric potential Renewable energy sources Capacitors Prototypes Voltage Switches Power electronics Stress Testing

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Initial Results on Primary Field Cancellation of Magnetic Induction Spectroscopy Technique for Fetal Acidosis Detection using COMSOL Multiphysics

Initial Results on Primary Field Cancellation of Magnetic In...

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2021 International Conference on Biomedical engineering, ICoBE 2021

作者： Halim, S.F. Abdul Zakaria, M.H. Zakaria, Z. Norali, A.N. Noor, A. Mohd Ahmed, A.A. Pusppanathan, J. Rahiman, M.H. Fazalul Muji, S.Z. Mohd Rahim, R. Abdul Biomedical Electronic Engineering Faculty of Electronic Engineering Technology Universiti Malaysia Perlis Arau Perlis 02600 Malaysia Universiti Teknologi Malaysia Skudai Johor81310 Malaysia Mechatronic Engineering Program Faculty of Electrical Engineering Technology Universiti Malaysia Perlis Malaysia Electronic Engineering Department Faculty of Electrical and Electronic Engineering Universiti Tun Hussein Onn Malaysia School of Electrical Engineering Faculty of Engineering Universiti Teknologi Malaysia Skudai Johor81310 Malaysia

Monitoring of fetal condition during labor could save hundred lives in a single year. During labor, fetus is at critical condition as acidosis may occur suddenly without any early symptoms. Invasive method such as Fetal Blood Sampling (FBS) has been used to detect the decline in pH level of fetus. However, fetal loss rate after FBS may range from 1.4% up to 25%. In this paper, magnetic field induction spectroscopy was implemented to determine fetal acidosis by using primary magnetic field cancellation technique. Magnetic Induction Spectroscopy (MIS) probe was design where transmitter coil (TX) is perpendicular to receiver coil (RX). The result shows that the secondary magnetic field produced have been successfully measured without any interruption from primary magnetic field. By using transmitter input 1A, it shows that voltage is inversely proportional to the blood pH due to the conductivity properties of blood. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Spectroscopy

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Multivariate Time-Series Deep Learning for Joint Prediction of Temperature and Relative Humidity in a Closed Space 8

Multivariate Time-Series Deep Learning for Joint Prediction ...

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8th International Conference on Computer Science and Computational Intelligence, ICCSCI 2023

作者： Gunawan, Fergianto E. Budiman, Arief S. Pardamean, Bens Juana, Endang Romeli, Sugiarto Cenggoro, Tjeng W. Purwandari, Kartika Hidayat, Alam A. Redi, Anak A.N.P. Asrol, Muhammad Industrial Engineering Department BINUS Graduate Program - Master of Industrial Engineering Bina Nusantara University Jakarta11480 Indonesia Computer Science Department BINUS Graduate Program - Master of Computer Science Program Bina Nusantara University Jakarta11480 Indonesia Bioinformatics and Data Science Research Center Bina Nusantara University Jakarta11480 Indonesia Electrical Engineering Department Faculty of Industrial Technology Universitas Trisakti Jakarta11440 Indonesia PT Impack Pratama Industri Jakarta14350 Indonesia Computer Science Department School of Computer Science Bina Nusantara University Jakarta11480 Indonesia Mathematics Department School of Computer Science Bina Nusantara University Jakarta11480 Indonesia

An accurate predictive model of temperature and humidity plays a vital role in many industrial processes that utilize a closed space such as in agriculture and building management. With the exceptional performance of deep learning on time-series data, developing a predictive temperature and humidity model with deep learning is propitious. In this study, we demonstrated that deep learning models with multivariate time-series data produce remarkable performance for temperature and relative humidity prediction in a closed space. In detail, all deep learning models that we developed in this study achieve almost perfect performance with an R value over 0.99. © 2023 The Authors. Published by Elsevier B.V.

关键词： closed space deep learning humity prediction indoor temperature prediction

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Broadbanding of electrically Small Hemispherical Helix Antennas

Broadbanding of Electrically Small Hemispherical Helix Anten...

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2022 International Symposium on Antennas and Propagation (ISAP)

作者： Mina Nishie Taiga Hannya Keisuke Noguchi Graduate Program in Electrical Engineering and Electronics Kanazawa Institute of Technology Nonoichi Ishikawa Japan Kinden Corporation Osaka Osaka Japan Department of Electrical and Electronic Engineering Kanazawa Institute of Technology Nonoichi Ishikawa Japan

ISBN: (数字)9781665479622

ISBN: (纸本)9781665479639

Novel wireless communication systems such as IoT devices and B5G are widely spreading, high performance electrically small antennas which is wireless interface of RF module is strongly demanded. As relationship between miniaturization of antenna and realization of high performance is trade-off, research and development for electrically small antennas are important. Though spherical helix antennas have been proposed as antennas that the size is possible to reduction by theoretical limitation, practical improvement of the antenna performance is required. This paper denotes broadbanding of the hemispherical helix antennas using an equivalent circuit with loss factor, and discuss the affects of loss factor on the wideband characteristics.

关键词： Wireless communication Resistance Performance evaluation Helical antennas Antenna theory Broadband antennas Wideband

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Real-Time Wheelchair Controller Based on POF-Based Pressure Sensors

Real-Time Wheelchair Controller Based on POF-Based Pressure ...

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Latin American Electron Devices Conference (LAEDC)

作者： A.X. González-Cely C.F. Blanco-Díaz Díaz Camilo A.R. T Bastos-Filho Telecommunications Laboratory Graduate Program in Electrical Engineering Federal University of Espírito Santo Av. Fernando Ferrari 514-Goiabeiras Vitoria Brazil Robotics and Assistive Technology Laboratory Graduate Program in Electrical Engineering Federal University of Espírito Santo Av. Fernando Ferrari 514-Goiabeiras Vitoria Brazil

The design of electrical wheelchair controllers remains a challenge for the scientific community. In recent years, Polymer Optical Fiber (POF)-based sensors have been used for biomedical applications, however, the application of these types of sensors for the control of assistive devices has been little explored. For this reason, this work proposes the design and validation of a fuzzy logic controller that uses information from an array of POF-based sensors located in a pillow, which is used for wheelchair control in four directions (right, left, forward and stop) by using neck movements. The results allow concluding that the system is fast, accurate, and reliable. This work presents a contribution related to the design of assistive devices based on optical fiber sensors and focuses on people with upper- and lower-limb mobility restrictions. Future studies will address the evaluation of the system for people with disabilities.

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Electrochemical Performance of a Water-Based LiFePO4 Cathode for Li-Ion Batteries

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Defect and Diffusion Forum 2022年 417卷 163-168页

作者： Chanhaew, Araya Aranmala, Komsak Darmawan, Luthfi Mursid Nisa, Shofirul Sholikhatun Nurohmah, Anisa Raditya Meethong, Nonglak Materials Science and Nanotechnology Program Department of Physics Faculty of Science Khon Kaen University Muang District Khon Kaen40002 Thailand Department of Chemical Engineering Faculty of Engineering Universitas Sebelas Maret Central Java Surakarta57126 Indonesia Centre of Excellence for Electrical Energy Storage Technology Universitas Sebelas Maret Central Java Surakarta57146 Indonesia Khon Kaen University Muang District Khon Kaen40002 Thailand

Lithium iron phosphate (LiFePO4) has received much attention because it can provide high power density, abundant raw materials, safety, low toxicity, and high thermal stability. In general, the production of LiFePO4 cathode uses Polyvinylidene fluoride (PVDF) as a binder and N-Methyl-2-Pyrrolidone (NMP) as a solvent. These components are expensive, toxic, and can affect the environment. Therefore, to cover this shortcoming, the solvent and binder were replaced in this study. The solvent is replaced with water, which is more environmentally friendly and abundant, while the binder is replaced with water soluble binders. Suitable electrode formulations were investigated to obtain high performance cylindrical typed Li-ion batteries. As a result, Formula B (ratio of LiFePO4: AB: KS6: SBR: CMC = 90: 3: 3: 2.677: 1.333) has the highest specific discharge capacity of 120 mAh/g. The NMP-based cathode can give about 145 mAh/g. Therefore, the water-based cathode LiFePO4 gives a value that is slightly lower the NMP-based formular. © 2022 Trans Tech Publications Ltd, Switzerland.

关键词： Lithium compounds

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The Impact of Hot Carrier Injection-Induced Device Degradation for Lower-Power FinFETs

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Journal of Electronic Materials 2023年第2期52卷 1391-1399页

作者： Chen, Yu-Lin Yeh, Wen-Kuan Hsu, Heng-Tung Chen, Ke-Horng Lien, Der-Hsien Lin, Wen-Chin Yu, Tien-Han Chiu, Yu-Sheng Godwinraj, D. Godfrey, D. Wu, Chien-Hung International College of Semiconductor Technology National Yang Ming Chiao Tung University Hsinchu Taiwan Graduate Degree Program of College of Electrical and Computer Engineering National Yang Ming Chiao Tung University Hsinchu Taiwan Institute of Electronics National Yang Ming Chiao Tung University Hsinchu Taiwan Institute of Microelectronics National Cheng Kung University Tainan Taiwan Department of ECE Amal Jyothi College of Engineering Kerala Kottayam India Department of Optoelectronics and Materials Engineering Chung Hua University Hsinchu Taiwan Department of Electronics and Communication Engineering Dayananda Sagar University Bengaluru India National Applied Research Laboratories Hsinchu Taiwan

The impact of hot carrier injection (HCI) on the performance of standard and low-VT FinFETs are investigated and benchmarked with each other. For this investigation, these FinFETs were fabricated with various gate lengths (L) from 16 to 36 nm. HCI-induced transconductance degradation in standard devices for gate length variations of 36 nm down to 16 nm was 75%, while it was 35% for low-VT devices. Similarly, the degradation of threshold voltage in standard devices for gate length variations of 36 nm down to 16 nm was 39%, while it was 36% for low-VT device. In this work, as the device is subject to HCI, we found that: (1) short-channel devices cause severe degradation on the threshold voltage and transconductance (gm) compared to long-channel devices, owing to the higher electric field for short-channel devices at the gate edge, (2) standard devices exhibit a more stable threshold voltage than that of low-VT power devices, since the TiN barrier layer prevents Al atom diffusion into the HfO2 layer, and (3) the transconductance efficiency of standard devices is better than that of low-VT power devices. Further, the lower-VT devices show lower transconductance degradation than standard devices. However, the transconductance degradation of the long-channel standard and low-VT devices are the same. Compared to short-channel low-VT devices, extended-channel standard devices are more immune to the HCI effect. © 2022, The Minerals, Metals & Materials Society.

关键词： Threshold voltage

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Power Quality Assessment of Oil and Gas Platform with High Penetration of Floating Offshore Wind Power

Power Quality Assessment of Oil and Gas Platform with High P...

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IEEE Annual Southern Power Electronics Conference (SPEC)

作者： Kassiane de Sousa Medeiros João Marcus Soares Callegari Lorrana Faria da Rocha Danilo Iglesias Brandao Graduate Program in Electrical Engineering Universidade Federal de Minas Gerais Belo Horizonte Brazil Department of Electric Energy Norwegian University of Science and Technology Trondheim Norway

This paper aims to analyze the effect on power quality of a Floating Production Storage and Offloading (FPSO) power system under high penetration of wind-based power generation. A set of results simulated in MATLAB/Simulink® is shown to assess different operational scenarios of a typical Brazilian FPSO, from Mero Oil Field. The floating offshore wind power penetration is varied from 10 to 50 MW and the FPSO power quality effects are reported; then the effect of increasing the umbilical distance from 12 to 150 km between the wind farm and FPSO is evaluated; and finally, the reduction in the number of gas turbine generators (3 and 2 generators) is performed. The conclusions are drawn based on steady-state and transient voltage and frequency profiles; active and reactive power flow between loads and generation; the rate of change of frequency and the minimum frequency reached under the disturbance event when a wind generation loss of 10 MW is triggered.

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Multi-Domain Optimization Design for a Bimodal Linear Ultrasonic Motor with Double Driving Feet

Multi-Domain Optimization Design for a Bimodal Linear Ultras...

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International Conference on electrical Machines and Systems (ICEMS)

作者： Xiang Li Yuan Ding Yangze Li School of Electrical Engineering and Automation Hefei University of Technology Hefei China Department of Sino-US Curriculum Program Hefei No.1 High School Hefei China

In this paper, an improved optimization design is conducted for a bimodal linear ultrasonic motor with respect to a set of multi-domain design parameters and constraints. Furthermore, the contact-based operating condition of the stator is considered such that the output performance parameters can be accurately evaluated enabling their use in a performance-based objective function for the multi-domain design optimization. The proposed methodology with respect to the geometry-mechanical-electrical multi-domain optimization parameters is verified by the optimization design of a bimodal linear ultrasonic motor with double driving feet.

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Relationship between Metacarpophalangeal Joint Angle and Muscle Activity of Healthy Persons while Using the Finger Extensor Facilitation Training Device “iPARKO”

Relationship between Metacarpophalangeal Joint Angle and Mus...

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IEEE International Conference on Rehabilitation Robotics (ICORR)

作者： Ai Nakamura Shota Ishigaki Yoshifumi Morita Hirofumi Tanabe Department of Engineering Electrical and Mechanical Engineering Program Nagoya Institute of Technology Aichi Japan Department of Electrical and Mechanical Engineering Nagoya Institute of Technology Aichi Japan Department of Health Science Shonan University of Medical Sciences Kanagawa Japan

ISBN: (数字)9781665488297

ISBN: (纸本)9781665488303

Applying an external force to a person’s hyperextended fingertip produces electrical activity in the extensor digitorum communis, even if the person does not try to open their hand. Based on this, a finger extensor facilitation technique conducted by therapists was developed. In this study, we developed a finger extensor facilitation training device named iPARKO that imitates this technique. We examined the relationship between the metacarpophalangeal (MP) joint angle of the four fingers and the activities in the extensor digitorum communis resulting from active training using iPARKO. At the same time, the relationship between the MP joint angle and the reduced activities in the flexor digitorum superficialis was also examined. The experiments were conducted on five healthy subjects. It was found that as the MP joint approached its own maximum hyperextension position, the amount of activity of the extensor digitorum communis increased, and the amount of activity of the flexor digitorum superficialis decreased.

关键词： Training Force Pressing Muscles Stroke (medical condition) Assistive robots Sensors

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