Elektrik Elektronik Mühendisliği Bölümü Yayın Koleksiyonu

Permanent URI for this collectionhttps://hdl.handle.net/20.500.12416/411

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Citation Count: Demirkutlu, E.; İskender, İ. "A Novel Transformerless Single-Phase Three-Level Buck-Boost Inverter", 2023 IEEE Applied Power Electronics Conference And Exposition, APEC, Proceedings, pp. 114-120, 2023.
A Novel Transformerless Single-Phase Three-Level Buck-Boost Inverter
(2023) Demirkutlu, Eyyup; Iskender, Ires; 133746
This paper proposes a novel transformerless, single-phase, three-level, buck-boost inverter. The proposed inverter can suppress the leakage current drawn from the input power source and provide a long-lasting solution for applications with a wide range and unregulated input voltage. Unlike similar topologies, in the proposed inverter there is no need to have a mid-point of DC sources or DC bus capacitors at the input side of the inverter. A single-phase, three-level, buck-boost inverter for realizing the power stage with 110-Vrms output AC voltage and a range of 100V-200V input DC voltage is investigated in this study. The proposed topology has been proven through theory, computer simulations, and experimental studies with SiC MOSFETs-based prototype of a 300-VA power supply. Theory, computer simulation, and experimental results are all correlated.
Citation Count: Najafi, Atabak; İskender, İ. (2021). "Amorf Çekirdekli Transformatörün Çoklu Fizik Yöntemiyle Elektromanyetik - Sıcaklık Analizi", Afyon Kocatepe Üniversitesi Fen ve Mühendislik Bilimleri Dergisi, Vol.21, No.5, pp.1086-1096.
Amorf Çekirdekli Transformatörün Çoklu Fizik Yöntemiyle Elektromanyetik - Sıcaklık Analizi
(2021) Najafi, Atabak; İskender, İres; 133746
Bu makalede, Amorf nüveli transformatörün sıcaklık analizini detaylı incelemek için, ısı transferi, akışkan akışı ve elektromanyetik analizlerini kapsayan çok disiplinli bir yaklaşım kullanılmıştır. Transformatörün bobini ve çekirdeğindeki güç kayıpları incelenip, sıcaklık ve akışkan akış analizleri elektromanyetik bir model ile birleştirilmiştir. Önerilen yöntem, Amorf çekirdekli gibi özel transformatörlerde, önceki noktasal sıcaklık bilgisine ya da sıcaklık Gradyan değerlerine ihtiyaç duymadan, sıcaklık değişimini detaylı olarak tahmin edebilmektedir. Teorik çalışma sonuçları uluslararası standartlara göre Dyn11, 34.5/0.4-kV, 630-kVA’lik amorf çekirdekli transformatör üzerine uygulanan deneysel çalışma sonuçlarıyla doğrulanmıştır. Teorik ve pratik çalışma sonuçlarının karşılaştırılması, sonuçların büyük bir uyum içinde olduğunu göstermekte olup, kullanılan yöntem genç mühendislere güç transformatörlerin sıcaklık analiz çalışmalarında faydalı bir araç oluşturmaktadır.
Citation Count: Yükselen, Emir; İskender, İres. "Analysis of Lightning Impulse Effects on Three Winding Transformer Used in Solar System Based ANSYS Maxwell", 2022 9th International Conference on Electrical and Electronics Engineering (ICEEE), IEEE, pp. 71-75.
Analysis of Lightning Impulse Effects on Three Winding Transformer Used in Solar System Based ANSYS Maxwell
(IEEE, 2022) Yükselen, Emir; İskender, İres; 133746
Transformers are in more critical applications in the renewable energy world and having a transformer fail in such a cyclical power station can be disastrous. Over voltage or voltage strike is the most important phenomena for the transformers. Thus, the evaluating and estimating the effects and stresses of these sudden high voltages is important during the transformers life time operation and design stage. Accordingly in this paper the electromagnetic field analyses of the lightning impulse on Photovoltaic (PV) transformer are investigated using ANSYS Maxwell software. The 3D and 2D model simulation of the PV transformer is carried out to determine the electric field and voltage distribution on critical regions which can cause breakdown on insulation material and damage transformer windings and affects transformer working. Afterwards according to the simulation result, the subjected transformer was designed considering the relative critical regions and performs the full wave lightning impulse test in factory area to verify the dielectric strength of the transformer. This study provides better understanding of the lightning impulse voltage effects with localization of the critical regions on the PV transformer and helps to improve the withstand capability of the transformer against the lightning impulse voltages during the design and production stage.
Citation Count: Jahi, Amir; İskender, İres. "Analysis of Short Circuit Electromagnetic Force in a Three Winding Transformer Used in Solar System", 2021 13th International Conference on Electrical and Electronics Engineering (ELECO), IEEE, pp. 393-397, 2021.
Analysis of Short Circuit Electromagnetic Force in a Three Winding Transformer Used in Solar System
(IEEE, 2021) Jahi, Amir; İskender, İres; 133746
Due to the increasing of the fossil fuels prices in the past years and lack of these sources, all scientists encouraged to looking for the alternative energy sources. One of these energy sources is renewable solar energy. Power transmission from solar systems to grid is achieved using step up transformers. This type of transformer is energized from two inverter with or without variable frequency. Power transformers are deals with a variety of mechanical, electrical and thermal stresses during normal life time operation. Transient electromagnetic forces cause mechanical stress on transformer parameters where calculation of these forces with traditional methods is extremely complex due to the geometry of the transformer. Accordingly in this study, the electromagnetic forces takes place in the windings of a Photovoltaic (PV) transformer are investigated and for calculation of these forces, the 3D and 2D model of transformer is adapted in the ANSYS Workbench. The analysis of electromagnetic forces during the three line fault on high voltage side of the transformer are performed by the Finite Element Method (FEM) and compared with the analytical results. The numerical modeling technique discussed in this study would be useful in the design stage of PV transformer with regard to evaluate ability of transformer to withstand the short circuit current.
Citation Count: Yükselen, Emir; İskender, İres (2023). "CASE STUDY ON THERMAL OPTIMIZATION OF OIL IMMERSED TRANSFORMER USED IN SOLAR POWER PLANT BASED ON GENETIC ALGORITHM AND COMPUTATIONAL FLUID DYNAMICS", THERMAL SCIENCE, Vol. 27, No. 5B, pp. 4077-4089.
CASE STUDY ON THERMAL OPTIMIZATION OF OIL IMMERSED TRANSFORMER USED IN SOLAR POWER PLANT BASED ON GENETIC ALGORITHM AND COMPUTATIONAL FLUID DYNAMICS
(2023) Yükselen, Emir; İskender, İres; 133746
Transformers are one of the most capital investments in the solar power generation. Their safe and stable operations in the electrical networks are important. The main failure factor of transformers is the high temperature generated by the losses during operation, which increases the probability of insulation damage that significantly affects the useful life of transformer. Considering the importance of oil temperature and its effects on the life of the transformer, a numerical method is developed in this paper to optimize the cooling system of the transformer. In this regard, genetic algorithm is used as an optimization method to minimize the total cost of the cooling system while maintaining the required thermal conditions of the transformer. A comprehensive parametric study is carried out among the effective cooling geometry parameters using 3-D electromagnetic and thermal models of the photovoltaic transformer to evaluate and analyze the temperature distribution. The accuracy and feasibility of the proposed method is established by comparing the numerical results with those obtained from the experimental test. The results of the proposed method are found to be in a good agreement with the experimental and simulation results.
Citation Count: Ciba, S.; İskender, İres; Ariani, H.A. (2020). "Comparing control performances of mrac and pid applied on a brushless dc motor", International Journal on Technical and Physical Problems of Engineering, Vol. 12, No. 3, pp. 10-15.
Comparing control performances of mrac and pid applied on a brushless dc motor
(2020) Ciba, S.; İskender, İres; Ariani, H.A.; 133746
Brushless DC motors are powered by a DC electric source and are used widely used in appliance, automotive, aerospace, medical and industrial equipment due to their compact size and light weight. Parallel to improvements in semiconductor industries the operating frequency of semiconductor switches and microcontrollers are getting improve and this provides conditions to use different algorithms in motor control. In this study the reference model adaptive control of a DC brushless motor will be studied. Brushless DC motors have some advantages such as long working life, high efficiency, and low maintenance requirements; however their control is a bit complicated. For this reason, there have been published many studies in relative with speed control of brushless DC motors. Classical or modern control methods can be used for this purpose. In this study, BLDC motor is controlled with firstly classical PID controller and secondly model reference adaptive control (MRAC) based on MIT law method and the results are compared.
Citation Count: Kavak, H.; İskender, İ.; Jahi, A. (2018). "Conducted Emi Performance Comparison Of Si And Sic Mosfets In A Ccm Boost Pfc Converter For MIL-STD-461F CE102", Poznan University Of Technology Academic Journals.
Conducted Emi Performance Comparison Of Si And Sic Mosfets In A Ccm Boost Pfc Converter For MIL-STD-461F CE102
(2018) Kavak, Halil; İskender, İres; Jahi, Amir; 133746
This paper presents a comparison of conducted EMI performance of Si and SiC MOSFETs in a CCM PFC boost converter that is designed to meet CE102 of MIL-STD461F. EMI performance comparison is based on MOSFET of the PFC converter. That is, the power switch of the converter is the only parameter that is changed during tests. The boost diode is kept the same during the tests and the type of the boost diode is SiC. The paper shows the CE102 test results of Si and SiC MOSFETs without an EMI filter at the input side of CCM PFC boost converter.
Citation Count: Kül, Seda...et al. "Coreloss Estimation via Long Short-Term Memory Model (LSTM) of Dry-Type Transformer based on FEA", 2021 10th International Conference on Renewable Energy Research and Application (ICRERA), 2021.
Coreloss Estimation via Long Short-Term Memory Model (LSTM) of Dry-Type Transformer based on FEA
(2021) Kül, Seda; Yildiz, Berat; Tamyurek, Bunyamin; İskender, İres; 133746
2021 10th International Conference on Renewable Energy Research and Application (ICRERA)
Citation Count: Telli, Simay; İskender, İres; Yükselen, Emir (2024). "Cost optimization of oil type distribution transformer using multi-objective genetic algorithm", Journal of Energy Systems, Vol. 8, No. 1, pp. 53-62.
Cost optimization of oil type distribution transformer using multi-objective genetic algorithm
(2024) Telli, Simay; İskender, İres; Yükselen, Emir; 133746
The demand for electrical energy is increasing day by day with the development of technology in the world. Distributing electric energy to all regions that need energy is a principal issue, and this necessitates the use of transformers to convert the voltage to the desired level. Accordingly, the use of transformers, one of the electrical devices converting AC voltage level at a defined frequency has grown significantly. In this study, design parameters of a 25 kVA, 33/0.4 kV, Yzn11, oil-type distribution transformer are optimized using the Multi-Objective Genetic Algorithm (MOGA) technique by decreasing the weight of the significant materials and manufacturing cost. Electromagnetic analysis of the transformer is performed with ANSYS Maxwell based on the design results obtained from the optimization study for validation of the method. The experimental design parameters are also compared with the optimization results. It is observed that optimum results are achieved by using the proposed approach.
Citation Count: Jahi, A.; İskender, İres (2021). "Design and performance analysis of a three winding transformer used in solar system", International Journal on Technical and Physical Problems of Engineering, Vol. 13, No. 1, pp. 38-45.
Design and performance analysis of a three winding transformer used in solar system
(2021) Jahi, A.; İskender, İres; 133746
Due to the increasing of the fossil fuels prices in the past years and lack of these sources, all scientists encouraged to looking for the alternative energy sources. One of these energy sources is the renewable solar resources. Power transfer from solar systems to grid is achieved using step up transformers. This type of transformer is energized from a converter/inverter with or without variable frequency. The losses of such transformer are higher than those used in sinusoidal voltage power systems. This is due to harmonics content in the transformer input voltage and current. In this study the design and production of a PV transformer have been done according to the IEEE C57.159 guide and the loss analyses of transformer have been done using ANSYS MAXWELL considering the procedures proposed in standards of IEC 61378-1, IEEE C57.110 and the method proposed by Dowell. Finally, the thermal modeling and behavior of the transformer was investigated using the thermal model given in [25] to determine the hot spot and life time of the transformer using MATLAB program. © 2021, International Organization on 'Technical and Physical Problems of Engineering'. All rights reserved.
Citation Count: Tülay, Gencer; İskender, İres (2020). "Design of a Novel Converter Between Li-Ion Battery and Supercapacitor to Feed Synthetic Aperture Radar Loads for Satellite Applications", International Journal of Renewable Energy Research, Vol. 10, No. 4, pp. 1869-1878.
Design of a Novel Converter Between Li-Ion Battery and Supercapacitor to Feed Synthetic Aperture Radar Loads for Satellite Applications
(2020) Tülay, Gencer; İskender, İres; 133746
For satellite applications the active duty life of a satellite depends mainly on the battery lifespan. The charging or discharging current has an important role in useful life of batteries. For this purpose, the converters used in power supplies including batteries should be accurately designed such that the large current of batteries can be prevented. The power converter proposed in this paper is used to transfer energy from battery to supercapacitor when SAR (Synthetic Aperture Radar) load is active. Accordingly, the lifespan of battery and hence the lifespan of satellite will be extended. Parallel to preventing the large discharging current of batteries the proposed converter has another important property such that it is able to vary the input voltage without having any stability problems. The operating performance of the converter that is composed of Weinberg and Buck converters is analyzed using PSpice software and the results of simulations are verified through experiments. The results show that how well the converter operates satisfying the conditions required for satellite applications.
Citation Count: Arslan, Sami; İskender, İres. (2022). "Design Of Frameless Gimbal Motor For UAV Applications", International Journal on Technical and Physical Problems of Engineering, Vol.14, No.1, pp.142-148.
Design Of Frameless Gimbal Motor For UAV Applications
(2022) Arslan, Sami; İskender, İres; 133746
Recently, application areas of the Unmanned Aerial Vehicle (UAV) systems have started to expand very rapidly due to the fact that offering more effective, economical, reliable and safe solutions compared to manned air platforms, satellites and/or various ground platforms. However, desire to develop higher performance, resourceful, lighter, small and low powered payload make the gimbal platforms mandatory part of the UAVs in a short time and their role is getting increased day by day. In parallel with the increasing demand for precise stabilization, robustness, lightness and agility in gimbal systems, it has become an important trend to use more-electric (ME) customed systems instead of traditional market products. The electric motors that control the speed and position of the gimbal system are simply referred to as gimbal motors. Related design study focuses on designing direct-drive in-runner frameless gimbal motor with the following features; 8.5 VAC line voltages, 24-slot/28-pole combination, 60 rpm, 80 mN.m. Permanent magnet synchronous motor topology is determined to offer higher torque density, higher precision and fast response required for gimbal platforms. The selecting criteria of dimensions, performance parameters, materials, machine type with rotor structures and motor duty cycle are also explained. The gimbal motor is performed analytically in Ansys RMxprt with parametric assignments, statistically and sensitively tuned in Maxwell 2D and optimized in Maxwell 3D by finite element method (FEM) optimetric convergence approach with magnetostatic and transient solutions to get the final machine shape. This study is currently part of the gimbal system to be produced for medium sized surveillance UAV. Since the gimbal motor has been prototyped, all dimensions given are valid.
Citation Count: Haliloglu, Ali Burhan; İskender, İres. (2022). "Design Studies of VSC HVDC Converter According to AC Voltage Tests", Energies, Vol.15, No.20.
Design Studies of VSC HVDC Converter According to AC Voltage Tests
(2022) Haliloglu, Ali Burhan; İskender, İres; 133746
Since high-voltage direct current (HVDC) systems are very expensive and operationally critical, these systems must be tested before they are put into service. Insulation and performance tests are the two main subjects of these tests. AC voltage tests, as part of the insulation tests, should be performed after system installation is complete and before commissioning. However, in this study, the objective was to perform these tests during the prototype phase of VSC HVDC. Unlike other studies, this study attempted to use COMSOL Multiphysics to determine in advance the problems that may occur in the real system. In this regard, the busbars connecting the submodules of the VSC HVDC system were first modeled in 3D, and the tests to be performed were simulated using COMSOL Multiphysics software. During the simulation, the finite element method (FEM) was used to identify critical points that could cause partial discharge. To validate the simulation results, partial discharge tests on a real system were conducted, and the design changes made in response to each test result were explained. After the improvement actions, the targeted partial discharge values were achieved.
Citation Count: Iskender, Ires; Kul, Seda; Balci, Selami, "FEA Simulation of the Electromagnetic Effects on the Flux Distribution of the Joints in the Transformer Core Structure", 2018 2nd International Symposium on Multidiscipliary Studies and Innovative Technologies (ISMSIT), pp. 88-92, (2018).
FEA Simulation of the Electromagnetic Effects on the Flux Distribution of the Joints in the Transformer Core Structure
(IEEE, 2018) Kul, Seda; İskender, İres; Balcı, Selami; 133746
In the manufacturing of the transformer the occurrence of air gaps at the joints of the legs and yokes of the core lamination stacking of the transformers is inevitable. The air-gap in the core joints affects the magnetic flux density and the magnetic flux distribution in the core. The location, shape, length and number of air-gaps all are different from each other. The increase in air-gap of transformer core will increase the reluctance of the core causing a reduction in the total magnetic flux value. The effects of the air-gap in joints cannot be exactly analyzed mathematically. However, the electromagnetic modeling using the finite element method provides facility to simulate and analyze such a problem. In this study, the effects of air-gaps with different shapes and length in the transformer legs on the stray magnetic are compared with using Finite Element Analysis (FEA) software.
Citation Count: Arslan, Sami; İskender, İres; Navruz, Tugba Selcen. (2023). "FEM-based optimal design and testing of synchronous magnetic coupling for aerospace Starter/Generator applications", Engineering Science And Technology-An International Journal-JESTECH, Vol.41.
FEM-based optimal design and testing of synchronous magnetic coupling for aerospace Starter/Generator applications
(2023) Arslan, Sami; İskender, İres; Navruz, Tugba Selcen; 133746
Improvements in high energy density rare-earth permanent magnets make it innovative to develop magnetic couplings for Starter/Generator applications in the light of more electric aircraft to ensure magnetically insulated contactless power transmission between decoupled shafts for safe operation. Although there are essential studies on magnetic couplings in the literature, especially those for aerospace Starter/Generator structures are rarely encountered. However, methodologies considering system constraints and examining design parameters of couplings are in demand. In response to such a need, this paper proposes the novel design of highly reliable synchronous radial magnetic couplings with torque requirements of 6 and 12 N.m to isolate Starter/Generator and piston engine shafts in model aircraft. The preliminary volume is obtained analytically. Simulations are executed by optimetric approaches in Ansys Maxwell 2D. Optimisation techniques are compared in Maxwell 3D to get the final shape. The retaining sleeve of 0.5 mm is suggested. Loss of synchronisation in the event of the piston shaft failure or exceeding the maximum torque of the coupling is also examined. The torque fluctuation at load changes is 0.1%. Performance tests are conducted on the direct dynamic test bench. Absolute error margin is 37% for the Virtual Work method, 13% for 2D FEM and 6% for 3D FEM. The coupling efficiency is 93.8% at the maximum operating speed and the critical angle, and 96.9% at the minimum torque angle and the minimum operating speed.(
Citation Count: Arslan, S.; İskender, İ.; Navruz, TS. (2023). "Finite Element Method-Based Optimisation of Magnetic Coupler Design for Safe Operation of Hybrid UAVs", Aerospace, Vol.10, No.2.
Finite Element Method-Based Optimisation of Magnetic Coupler Design for Safe Operation of Hybrid UAVs
(2023) Arslan, Sami; İskender, İres; Nevruz, Tuğba Selcen; 133746
The integration of compact concepts and advances in permanent-magnet technology improve the safety, usability, endurance, and simplicity of unmanned aerial vehicles (UAVs) while also providing long-term operation without maintenance and larger air gap use. These developments have revealed the demand for the use of magnetic couplers to magnetically isolate aircraft engines and starter-generator shafts, allowing contactless torque transmission. This paper explores the design aspects of an active cylindrical-type magnetic coupler based on finite element analyses to achieve an optimum model for hybrid UAVs using a piston engine. The novel model is parameterised in Ansys Maxwell for optimetric solutions, including magnetostatics and transients. The criteria of material selection, coupler types, and topologies are discussed. The Torque-Speed bench is set up for dynamic and static tests. The highest torque density is obtained in the 10-pole configuration with an embrace of 0.98. In addition, the loss of synchronisation caused by the piston engine shaft locking and misalignment in the case of bearing problems is also examined. The magnetic coupler efficiency is above 94% at the maximum speed. The error margin of the numerical simulations is 8% for the Maxwell 2D and 4.5% for 3D. Correction coefficients of 1.2 for the Maxwell 2D and 1.1 for 3D are proposed.
Citation Count: Ciba, Sümeyra; İskender, İres (2019). "Fırçasiz Doǧru Akım Motorlarının Model Referans Adaptif Kontrol Yöntemi - MIT Kuralı ile Kontrol Edilmesi", 2018 International Conference on Artificial Intelligence and Data Processing, IDAP 2018.
Fırçasiz Doǧru Akım Motorlarının Model Referans Adaptif Kontrol Yöntemi - MIT Kuralı ile Kontrol Edilmesi
(2019) Ciba, Sümeyra; İskender, İres; 133746
In this study, the control of Brushless DC Motors (BLDC), which gained popularity in recent years, is discussed. As a result of insufficient classical control methods, modern control methods have been needed and BLDC is controlled with model reference adaptive control (MRAC) - with MIT law method. For this purpose pulse function, sine wave and step function were applied as a reference speed and the output speed of the system was observed. Simulation results show that the speed of the system follows the speed of the reference model. Then it was thought that in the course of time the resistance value will change because of heated motor and according to this situation the resistance value increased and the output of the system is observed again.
Citation Count: Demirkutlu, Eyyup; İskender, İres (2021). "Grid Connected Three-Phase Boost-Inverter for Solar PV Systems", International Journal of Renewable Energy Research, Vol. 11, No. 2, pp. 776-784.
Grid Connected Three-Phase Boost-Inverter for Solar PV Systems
(2021) Demirkutlu, Eyyup; İskender, İres; 133746
This paper presents a transformerless grid-connected three-phase boost-type inverter derived from the Swiss Rectifier (SR) and can be used in solar systems. The proposed boost-inverter retains the great advantages of the Swiss rectifier. Since the number of switches that are instantly switched with high frequency is only two, the switching losses are very low, therefore the proposed boost-inverter is very advantageous in terms of efficiency. Without having large transformer and electrolytic bus capacitors, the boost-inverter has an advantage in terms of size and weight. The switching states of the topology are given in detail. The operation principle of the boost-inverter is described with the help of equivalent circuits. A cascaded control method including current and voltage loops is designed. Simulation results are presented to validate the operation of the boost-inverter and show quality performance of the designed control approach. © 2021, International Journal of Renewable Energy Research. All Rights Reserved.
Citation Count: Haliloğlu, Ali Burhan; İskender, İres (2020). "High voltage dc systems and the related commisioning", International Journal on Technical and Physical Problems of Engineering, Vol. 12, No. 1, pp. 90-98.
High voltage dc systems and the related commisioning
(2020) Haliloğlu, Ali Burhan; İskender, İres; 133746
The number of High Voltage Direct Current (HVDC) projects worldwide has increased considerably due to the growing interest in this mature technology. Rapid development in semiconductor technology have led to the development of converter technology and thus new application areas have emerged. In this study, historical development of HVDC systems, differences among them considering installation types and application areas are explained. Circuit models of HVDC systems, working principle and general usage purposes are also explained. The differences between conventional Current Source Converters (CSC) and Voltage Source Converters (VSC), which are expressed as relatively new technology, are discussed. Also, within the scope of a project, a HVDC prototype system developed by local engineers from mechanical design to control and protection software has been described. In addition, the tests to be performed before commissioning of HVDC and similar systems are explained. Descriptions of the tests, methods to perform the tests and some issues that should be considered while performing the tests are given. © 2020, International Organization on 'Technical and Physical Problems of Engineering'. All rights reserved.
Citation Count: Doğan, Z.; Özsoy, M.; İskender, İ. (2019). "Manyetik Rezonansa Dayalı Kablosuz Enerji Transferi İçin Yeni Bir Nüve Geometrisi", Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım ve Teknoloji, Vol.7, No.4, pp.1012-1024.
Manyetik Rezonansa Dayalı Kablosuz Enerji Transferi İçin Yeni Bir Nüve Geometrisi
(2019) Doğan, Zafer; Özsoy, Mustafa; İskender, İres; 133746
Kablosuz Enerji Transferi (KET) uygulamalarında en önemli hedef, verimli bir enerji transferi sağlamaktır. KET günümüzde cep telefonu şarjı, elektrikli araç şarjı, aydınlatma, kontrol vb. birçok alanda uygulanmaktadır. Yüksek verimi, çevresel olumsuz etkilerinin az olması gibi avantajlarından dolayı, manyetik rezonans yöntemi en çok tercih edilen KET yöntemidir. Manyetik rezonansa dayalı KET sistemlerinde, sistem verimini artırmak için yüksek verimli bir KET transformatörü kullanılmalıdır. Bu çalışmada manyetik rezonansa dayalı bir KET sisteminin tasarımı yapılmıştır. Bu amaçla öncelikle hibrit (hava-ferrit) nüveli özgün bir transformatör tasarlanmıştır. Transformatörün Dairesel-Dilimli Parçalı(D-DP) ferrit nüve yapısı ilk defa bu çalışmada kullanılmıştır. Transformatörün sargıları litz iletken olarak tasarlanmıştır. Transformatörde kaçak akıları en aza indirmek amacıyla sargıların dış yüzeylerine alüminyum levhalar kullanılarak manyetik akı sargılar arasında kalmaya zorlanmıştır. Tasarlanan transformatörün sonlu elemanlar yöntemi ile manyetik analizleri yapılmış ve sonuçları nümerik hesaplarla doğrulanmıştır. Manyetik analiz sonuçları kullanılarak, KET transformatörü simülasyon devresi üzerinden yüklenmiş ve % 97 verim ile elektrik enerjisi transferi gerçekleştirilmiştir. Elde edilen sonuçlar D-DP ferrit nüve yapısının KET transformatörü uygulamalarında başarı ile kullanılabileceğini göstermiştir.

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