Aydemir, Mehmet Timur

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Profile URL
https://hdl.handle.net/20.500.12469/6151
Name Variants
A.,Mehmet Timur
A., Mehmet Timur
Aydemir, Mehmet Timur
AYDEMIR, MEHMET TIMUR
Aydemir M.
MEHMET TIMUR AYDEMIR
AYDEMIR, Mehmet Timur
Mehmet Timur AYDEMIR
M. Aydemir
Mehmet Timur, Aydemir
Aydemir,Mehmet Timur
Aydemir,M.T.
Aydemir, M. T.
M. T. Aydemir
Mehmet Timur Aydemir
Aydemir, M.
Aydemir, MEHMET TIMUR
Aydemir T.
AydemIr, M. Timur
Aydemir, M.T.
Aydemir, M.Timur
Aydemir, M. Timur
Job Title
Prof. Dr.
Email Address
[email protected]
Main Affiliation
Electrical-Electronics Engineering
Status
Current Staff
Website
ORCID ID
0000-0001-9405-6854
Scopus Author ID
56373635300
Turkish CoHE Profile ID
Google Scholar ID
WoS Researcher ID
ABH-1551-2020

Sustainable Development Goals

NO POVERTY1
NO POVERTY
0
Research Products
ZERO HUNGER2
ZERO HUNGER
0
Research Products
GOOD HEALTH AND WELL-BEING3
GOOD HEALTH AND WELL-BEING
0
Research Products
QUALITY EDUCATION4
QUALITY EDUCATION
0
Research Products
GENDER EQUALITY5
GENDER EQUALITY
0
Research Products
CLEAN WATER AND SANITATION6
CLEAN WATER AND SANITATION
0
Research Products
AFFORDABLE AND CLEAN ENERGY7
AFFORDABLE AND CLEAN ENERGY
5
Research Products
DECENT WORK AND ECONOMIC GROWTH8
DECENT WORK AND ECONOMIC GROWTH
0
Research Products
INDUSTRY, INNOVATION AND INFRASTRUCTURE9
INDUSTRY, INNOVATION AND INFRASTRUCTURE
2
Research Products
REDUCED INEQUALITIES10
REDUCED INEQUALITIES
0
Research Products
SUSTAINABLE CITIES AND COMMUNITIES11
SUSTAINABLE CITIES AND COMMUNITIES
1
Research Products
RESPONSIBLE CONSUMPTION AND PRODUCTION12
RESPONSIBLE CONSUMPTION AND PRODUCTION
0
Research Products
CLIMATE ACTION13
CLIMATE ACTION
1
Research Products
LIFE BELOW WATER14
LIFE BELOW WATER
0
Research Products
LIFE ON LAND15
LIFE ON LAND
0
Research Products
PEACE, JUSTICE AND STRONG INSTITUTIONS16
PEACE, JUSTICE AND STRONG INSTITUTIONS
0
Research Products
PARTNERSHIPS FOR THE GOALS17
PARTNERSHIPS FOR THE GOALS
0
Research Products
Documents

72

Citations

995

h-index

14

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Documents

63

Citations

761

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Scholarly Output

24

Articles

16

Views / Downloads

293/2075

Supervised MSc Theses

0

Supervised PhD Theses

1

WoS Citation Count

185

Scopus Citation Count

241

Patents

0

Projects

0

WoS Citations per Publication

7.71

Scopus Citations per Publication

10.04

Open Access Source

9

Supervised Theses

1

JournalCount
Electrical Engineering2
2021 14th Ieee International Conference on Industry Applications (Induscon)1
2021 8th International Conference on Electrical and Electronics Engineering (Iceee 2021)1
2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 -- 2023 IEEE Energy Conversion Congress and Exposition, ECCE 2023 -- 29 October 2023 through 2 November 2023 -- Nashville -- 1959321
2025 12th International Conference on Electrical and Electronics Engineering, ICEEE 2025 -- 12th International Conference on Electrical and Electronics Engineering, ICEEE 2025 -- 24 September 2025 through 26 September 2025 -- Istanbul -- 2177121
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Now showing 1 - 10 of 24
  • Thumbnail Image
    Article
    Citation - Scopus: 1
    A Novel Multiscale Graph Signal Processing and Network Dynamics Approach to Vibration Analysis for Stone Size Discrimination via Nonlinear Manifold Embeddings and a Convolutional Self-Attention Model
    (Springer Wien, 2025) Mirza, Fuat Kaan; Oz, Usame; Hekimoglu, Mustafa; Aydemir, Mehmet Timur; Pural, Yusuf Enes; Baykas, Tuncer; Pekcan, Onder
    Understanding nonlinear dynamics is critical for analyzing the hidden complexities of vibrational behavior in real-world systems. This study introduces a graph-theoretic approach to analyze the complex nonlinear temporal patterns in vibrational signals, utilizing the Tri-Axial Vibro-Dynamic Stone Classification dataset. This dataset captures high-resolution acceleration signals from controlled stone-crushing experiments, providing a unique opportunity to investigate temporal dynamics associated with distinct stone sizes. A 12-level Maximal Overlap Discrete Wavelet Transform is employed to perform multiscale signal decomposition, enabling the construction of transition graphs that encode transient and stable structural characteristics. Conceptually, transition graphs are analyzed as dynamic networks to uncover the interactions and temporal patterns embedded within vibrational signals. These networks are studied using a comprehensive suite of complexity metrics derived from information theory, graph theory, network science, and dynamical systems analysis. Metrics such as Shannon and Von Neumann's entropy evaluate signal dynamics' stochasticity and information retention. At the same time, the spectral radius measures the network's stability and structural robustness. Lyapunov exponents and fractal dimensions, informed by chaos theory and fractal geometry, further capture the degree of nonlinearity and temporal complexity. Complementing these dynamic measures, static network metrics-including the clustering coefficient, modularity, and the static Kuramoto index-offer critical discernment into the network's community structures, synchronization phenomena, and connectivity efficiency. Manifold learning techniques address the high-dimensional feature space derived from complexity metrics, with UMAP outperforming ISOMAP, Spectral Embedding, and PCA in preserving critical data structures. The reduced features are input into a convolutional self-attention model, combining localized feature extraction with long-term sequence modeling, achieving 100% classification accuracy across stone-size categories. This study presents a comprehensive framework for vibrational signal analysis, integrating multiscale graph-based representations, nonlinear dynamics quantification, and UMAP-based dimensionality reduction with a convolutional self-attention classifier. The proposed approach supports accurate classification and contributes to the development of data-driven tools for automated diagnostics and predictive maintenance in industrial and engineering contexts.
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    Conference Object
    Design and Thermal Analysis of a High-Voltage High-Frequency Transformer
    (IEEE Computer Society, 2025) Shan, A.; Ozdemir, M.A.; Tamyürek, B.; Aydin, E.; Aydemir, M.T.
    High-voltage high-frequency (HVHF) transformers are one of the crucial components in HVDC power supplies. However, they occupy more space, and compared to other components in the system, they experience more energy losses. HVHF transformers need special attention to both thermal and electrical properties, mainly because of the use of ferrite cores. Ferrite materials show temperature-dependent properties, and transformer efficiency, reliability, and safety are enormously affected by the thermal behavior of ferrite cores. At high operating temperatures, the core performance may be reduced, leading to an increase in total losses and a decrease in the insulation life. Therefore, for optimal transformer design, it is very crucial to select an appropriate core material and predict its thermal behavior accurately. This article focuses on the thermal analysis and modeling of a 10 kVA, 500V/11 kV HVHF transformer using ANSYS simulation tools. Finite element analysis (FEA) is used to calculate the core losses and temperature distribution, enabling a deeper understanding of thermal limitations and design choices. © 2025 IEEE.
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    Article
    Citation - WoS: 2
    Citation - Scopus: 5
    Design and Implementation of a 10 Kv/10 Kw High-Frequency Center-Tapped Transformer
    (Springer, 2022) Rahman, Showrov; Candan, Muhammed Yusuf; Tamyurek, Bunyamin; Aydin, Emrullah; Mese, Huseyin; Aydemir, M. Timur
    High voltage high-frequency (HVHF) transformers have a crucial part in the realization of high voltage direct current (HVDC) isolated power supplies. Nevertheless, they are the bulkiest component in the system besides being one of the major contributors to the power losses. Special care is therefore required to design HVHF transformers. The main objective of this paper is to design and implement a high voltage (10 kV), high-frequency (50 kHz) center-tapped transformer with high efficiency, small size, and low cost. The proposed transformer is designed as part of a 100 kV, 10 kW DC/DC converter for supplying power to a particle accelerator. The proposed transformer steps up the input voltage (500 V) to 10 kV. Then, a five-stage full-wave Cockcroft-Walton voltage multiplier (CWVM) is used for boosting the voltage to 100 kV. A detailed step-by-step design guideline for designing an HVHF transformer is also presented. To reduce the transformer's parasitic capacitance, the secondary windings are wrapped in segments. This taken approach has been illustrated in the paper and later verified through finite element analysis (FEA). The FEA analysis shows that the transformer parasitic capacitance has reduced significantly. Following the presented design guideline, the implemented prototype transformer has been built and later tested with a single-stage CWVM. The experimental results demonstrate that the prototype transformer has successfully met the design requirements including the small size, less weight, and low-cost objectives.
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    Review
    Citation - WoS: 81
    Citation - Scopus: 107
    A Comprehensive Review on Wireless Capacitive Power Transfer Technology: Fundamentals and Applications
    (IEEE-Inst Electrical Electronics Engineers Inc, 2022) Erel, Mehmet Zahid; Bayindir, Kamil Cagatay; Aydemir, Mehmet Timur; Chaudhary, Sanjay K.; Guerrero, Josep M.
    Capacitive power transfer (CPT) technology is becoming increasingly popular in various application areas. Due to its limitations, such as low frequency, low coupling capacitance, and the high voltage stress on metal plates, the studies on high power CPT applications fell behind previously. Therefore, the wideband gap (WBG) semiconductor devices and the compensation topologies are further adopted to tackle these limitations. The main purpose of the paper is to review CPT applications in terms of performance parameters, advantages, disadvantages, and also challenges. Initially, the basic principles of CPT technology are examined, which cover compensation topologies, coupler structures, transfer distance, power electronic components, and system control methods. Then, CPT applications are evaluated for performance parameters (i.e., power level, operation frequency, system efficiency, transfer distance) along with compensation types, inverter types, and coupler types. The applications are categorized into six main groups according to industrial topics as safety, consumer electronics, transport, electric machines, biomedical, and miscellaneous. Herein, power level changes from mu W to kW ranges, the operation frequency varies from 100s of kHz to 10s of MHz ranges as well. The maximum system efficiency is recorded as 97.1 %. The transfer distance varies from mu m range to 100s of mm ranges. The full-bridge inverter topology and four-plate coupler structure are noticeable in CPT applications. Finally, advantages, disadvantages, and challenges of CPT applications are evaluated in detail. This review is expected to serve as a reference for researchers who study on CPT systems and their applications.
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    Article
    Citation - WoS: 11
    Citation - Scopus: 13
    A New Semi-Analytical Approach for Self and Mutual Inductance Calculation of Hexagonal Spiral Coil Used in Wireless Power Transfer Systems
    (SPRINGER, 2021) Aydın, Emrullah; Yıldırız, Emin; Aydemir, M. Timur
    Several methods have been proposed in the literature for the calculation of self and mutual inductance. These methods include the use of complex integral analysis, the necessity of having primary and secondary coils with the same dimensions and the limitations of the ratio of the coil dimension to the distance between the coils. To overcome these restrictions, a new semi-analytical estimation method has been proposed in this paper. Calculation the self and mutual inductance by using the same basic formula which is based on Biot Savart Law prevents the formation of complex integrals and helps create a simple solution method. In order to verify the results obtained with the analytical approach, two hexagonal coils with 10 and 20 cm outer side lengths were produced by using litz wire with a conductive cross section of 1.78 mm(2). The results obtained with the new approach are compared with the finite element analysis, other work presented in the literature and experimental results in order to prove the accuracy of the proposed method.
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    Article
    Solar Energy-Powered Wireless Charging System for Three-Wheeled E-Scooter Applications
    (Pergamon-elsevier Science Ltd, 2025) Erel, Mehmet Zahid; Ozdemir, Mehmet Akif; Aydemir, Mehmet Timur
    Wireless power transfer (WPT) is a remarkable charging technology that addresses the range limitations and complexity of light electric vehicles. This study presents a novel approach to a solar-powered WPT system designed for three-wheeled e-scooter applications. The proposed system offers compact, lightweight, and costeffective solution with a ferrite-less structure and a series-series (SS) compensation topology, resulting in enhanced system efficiency and adaptability. The compact and efficient converters are designed to enhance performance and reduce system size. A Proportional-Integral (PI) controlled Perturb and Observe (P&O) maximum power point tracking (MPPT) method is implemented to optimize energy extraction from three solar panels. The design is validated through comprehensive simulations and demonstrates a superior dynamic response over the Incremental Conductance MPPT (ICM) method. Performance tests confirm the reliability of the experimental prototype, achieving a system efficiency of 88.5 % at 300-W output power over a 100 mm transfer distance under fully aligned condition. Comparative analyses with existing solar-powered e-cycle systems highlight the proposed design's superiority in efficiency, cost-effectiveness, and adherence to safety standards. The results indicate that the proposed design enhances sustainable urban transportation by reducing carbon emissions and decreasing reliance on fossil fuels, facilitating the wider integration of renewable energy sources.
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    Article
    Yüksek Da Gerilim Uygulamaları için Empedans Kaynaklı Yükseltici Çevirici Tasarımı
    (2023) Aydemir, Mehmet Timur; Dağ, Bülent; Özdemir, Mehmet Akif; Aydın, Emrullah; Tamyürek, Bünyamin
    Bu çalışmada yüksek DA gerilimli bir güç kaynağında kullanılmak üzere yüksek kazançlı yeni nesil bir empedans kaynaklı yükseltici çeviricinin güç katı tasarımı yapılmıştır. Ele alınan empedans kaynaklı çevirici yeni geliştirilmiş bir topoloji olup, çeviricinin temel çalışma prensibi daha önceki bir çalışmada detaylı şekilde incelenmiştir. Bu çalışmada çeviricinin hedeflenen uygulamaya yönelik tasarımı için gereken gerilim-denge ve akım-denge eşitlikleri çıkarılmıştır ve bu eşitlikler kullanılarak uygun devre elemanları değerleri belirlenmiştir. Tasarlanan çeviricinin performansı Matlab-Simulink benzetim modeli ile doğrulanmıştır.
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    Conference Object
    Citation - Scopus: 1
    Dual Side Control Design for a 600w Lcc Compensated Wireless Power Transfer System
    (Institute of Electrical and Electronics Engineers Inc., 2022) Pashaei, A.; Aydin, E.; Aydemir, M.T.
    The purpose of this paper is to design a dual side control for a 600 W LCC resonant WPT electrical bicycle with an 85 kHz resonant frequency. Primary side control use inverter voltage and current to determine mutual inductance and load value in coils misalignment case. The secondary side control uses a DC-DC converter that has two voltage and current feedback with a PI controller to achieve CC/CV charging in the battery. Additionally, with primary side control the high-frequency inverter operates in ZVS mode. Optimal design parameters are obtained and results and control method feasibility validated by simulations. © 2022 IEEE.
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    Article
    Citation - WoS: 7
    Citation - Scopus: 10
    A New Capacitive Coupler Design for Wireless Capacitive Power Transfer Applications
    (Elsevier - Division Reed Elsevier India Pvt Ltd, 2023) Erel, Mehmet Zahid; Bayindir, Kamil Cagatay; Aydemir, Mehmet Timur
    Capacitive power transfer (CPT) technology has become a promising alternative solution for wireless charging applications. This paper proposes a novel coupler design to form a resonant capacitor by inserting dielectric material between two bent metal plates for each primary and secondary circuit. The main purpose of the proposed coupler is to eliminate the external capacitors and solve the low coupling capacitance for CPT applications. A comparison to the conventional four-plate coupler is presented, which shows specifically higher coupling capacitance, lower required inductance, and lower cost. Finally, the effectiveness of the proposed coupler structure is verified by simulation and experimental results. (c) 2023 Karabuk University. Publishing services by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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    Conference Object
    Artificial Neural Networks Predictive Maintenance for Isolated Power DC-DC Converters
    (Institute of Electrical and Electronics Engineers Inc., 2025) Manatov, Kanat; Fihavango, Titus; Aydemir, Mehmet Timur