Kıvanç, Ömer Cihan

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Ömer Cihan, Kıvanç
Ö. C. Kıvanç
Kivanc Omer Cihan
Kivanc, Omer
Kivanc, Cihan
Kivanc O.
Ömer C. Kıvanç
KIVANÇ Ömer Cihan
Ömer Cihan Kıvanç
Kıvanç, Ömer
Kıvanç, C.
Kıvanç Ö.
Ö. C. KIVANÇ
Ömer Cihan KIVANÇ
Omer Cihan KiVANC
KiVANC Omer Cihan
Kıvanç, Ömer Cihan
O. C. Kivanc
Ö. Cihan Kıvanç
Omer C. Kivanc
Kıvanç Ömer Cihan
Kivanc, C.
O. Cihan Kivanc
Kıvanç, Ö.
Kıvanç, Cihan
O. C. KiVANC
Kivanc, O.
Kivanç Ö.
Omer Cihan Kivanc
Kivanc, Omer Cihan
Kivanc, O. Cihan
Kivane, Omer Cihan
Kıvanç, Ömer Cihan
Kivanc, O. C.
Kivanc,O.C.
Job Title
Doç.Dr.
Email Address
cihan.kivanc@okan.edu.tr
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Elektrik / Electrical
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Scholarly Output

66

Articles

23

Citation Count

0

Supervised Theses

10

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2012 - 2019422020 - 202424
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Now showing 1 - 10 of 66
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    Conference Object
    Citation - Scopus: 0
    Design and manufacture of electric powertrain and its cooling system for ITU EV project
    (Institute of Electrical and Electronics Engineers Inc., 2014) Ustun,O.; Cakan,M.; Tuncay,R.N.; Mokukcu,M.S.; Kivanc,O.C.; Mutlu,Y.; Tosun,G.
    In recent years all expositions of cars show that every car manufacturing company is developing at least one electric vehicle. Recently, ITU ALEK (Istanbul Technical University Alternative Energy Club) members and its supervisor created an electric vehicle project called ITU EV (electric vehicle). This project is about developing a drive system for a conventional internal combustion engine (ICE) vehicle. The project which started in 2011, has four different main research areas. These are electric powertrain which includes water cooling design, battery part, controlling part, mechanical construction and outer design part. In this study, electric powertrain design, cooling calculations and design, and production parts of the project will be investigated. For electric drivetrain a special design of 70 kW BLDC (brushless dc) motor is produced and laboratory tests are made. The rated voltage is chosen as 355 V. © 2014 IEEE.
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    Conference Object
    Citation - Scopus: 4
    Development of high efficiency multi-output flyback converter for industrial applications
    (Institute of Electrical and Electronics Engineers Inc., 2016) Tosun,G.; Kivanc,O.C.; Oguz,E.; Ustun,O.; Tuncay,R.N.
    This study presents the development processes of a high-efficiency two-output flyback-converter. The detailed design phases are presented together with encountered design obstacles, limitations and the methods to overcome them. Despite their widely use in industry, studies on high-efficient flyback converter design still remains a need. Most of the flyback converters are designed with multi outputs for their various input voltages. This study firstly describes the preliminary design stages, modeling studies and definition of magnetic and electronic components and PCB design processes followed by a prototype manufacturing. Modelling study is conducted in MATLAB/Simulink environment, and PCB design is realized in Altium Designer Software. Prototype is tested and its performance parameters are recorded. It is seen that the performance values are good agreement with those of design objectives. © 2015 Chamber of Electrical Engineers of Turkey.
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    Review
    Citation - WoS: 33
    Citation - Scopus: 43
    A Review of Modular Multilevel Converters for Stationary Applications
    (Mdpi, 2020) Wang, Yang; Aksoz, Ahmet; Geury, Thomas; Ozturk, Salih Baris; Kivanc, Omer Cihan; Hegazy, Omar
    A modular multilevel converter (MMC) is an advanced voltage source converter applicable to a wide range of medium and high-voltage applications. It has competitive advantages such as quality output performance, high modularity, simple scalability, and low voltage and current rating demand for the power switches. Remarkable studies have been carried out regarding its topology, control, and operation. The main purpose of this review is to present the current state of the art of the MMC technology and to offer a better understanding of its operation and control for stationary applications. In this study, the MMC configuration is presented regarding its conventional and advanced submodule (SM) and overall topologies. The mathematical modeling, output voltage, and current control under different grid conditions, submodule balancing control, circulating current control, and modulation methods are discussed to provide the state of the MMC technology. The challenges linked to the MMC are associated with submodule balancing control, circulating current control, control complexity, and transient performance. Advanced nonlinear and predictable control strategies are expected to improve the MMC control and performance in comparison with conventional control methods. Finally, the power losses associated with the advanced wide bandgap (WBG) power devices (such as SiC, GaN) are explored by using different modulation schemes and switching frequencies. The results indicate that although the phase-shifted carrier-based pulse width modulation (PSC-PWM) has higher power losses, it outputs a better quality voltage with lower total harmonic distortion (THD) in comparison with phase-disposition pulse width modulation (PD-PWM) and sampled average modulation pulse width modulation (SAM-PWM). In addition, WBG switches such as silicon carbide (SiC) and gallium nitride (GaN) devices have lower power losses and higher efficiency, especially at high switching frequency in the MMC applications.
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    Article
    Citation - WoS: 1
    Citation - Scopus: 1
    An approach to improve the performance of cooperative unmanned vehicle team
    (Tubitak Scientific & Technological Research Council Turkey, 2019) Kivanc, Omer Cihan
    In this paper, a method based on optimal energy management is proposed in order to improve the operational and tactical abilities of collaborative unmanned vehicle teams. Collaborative unmanned systems are used in surveillance, tracking, and military operations. The optimal assignment of these tasks requires cooperation among the vehicles in order to generate a strategy that is efficient with respect to overall mission duration and satisfies all problem constraints. The key motivation behind this paper is to design an unmanned vehicle team that mitigates the disadvantages caused by the structures and characteristics of unmanned ground vehicles (UGVs) and unmanned aerial vehicles (UAVs), which are used in these systems. The design steps of the developed system are explained in three sections in a multidisciplinary fashion. In the first section, the optimal energy consumption profile is estimated by simulating the UAV's flight on a Nvidia Jetson TX2 embedded system, located on the UGV. In the second section, a UAV charger design and implementation is done via development of a TMS320F28335 DSP controlled 65 W inductive wireless power transfer circuit, and in the third section an algorithm that calculates the optimal range and route for the user-selected way points using the state of charge of the UAV's LiPo batteries and a preflight simulation using the simulated annealing method are developed. The experiments are performed in real time with an example scenario and the proposed strategy's suitability and effectiveness are verified for cooperative unmanned vehicle teams.
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    Article
    Fiziksel Değişimlerin Li-ion Batarya Üzerine Etkilerinin İncelenmesi
    (2019) Ömer Cihan KIVANÇ
    Batarya teknolojilerindeki ilerlemeler ile birlikte li-ion bataryaların ağırlık, hacim başına depoladıkları enerji miktarı artmakta vekontrol sistemlerinde önemli gelişmeler meydana gelmektedir. Bunun yanında li-ion batarya fiyatlarının düşmesi ile elektrikliaraçlardan kullanıcı elektroniğine kadar birçok alanda li-ion bataryaların kullanım oranının arttığı görülmektedir. Ancak bubataryaların yüksek performanslı kullanımı için sağlık, doluluk durumlarının sürekli takibi ve denetlenmesi gerekmektedir. Budenetleme yaygın olarak hücrelerin gerilim, akım ve sıcaklık değerini kullanarak yapılmaktadır. Buna karşılık bataryanın güvenlikdurumunun takibinde hücrelerin şişmesi ve fiziksel yıpranmalarında bir fonksiyon girdisi olarak kullanılması gerekmektedir. Özellikletaşınabilir telefon, bilgisayar gibi cihazlarda kullanıcının doğrudan bataryaya temas etmesi güvenlik problemi yaratmaktadır.Kullanıcıların sahip olduğu farklı şarj cihazları kullanma, hızlı şarj ve şarj esnasında kullanım alışkanlıkları sebebiyle bu güvenlikproblemleri artmaktadır. Ayrıca elektrikli araçlarda seri/paralel paketlenen hücreler şişerek komşu hücreler üzerindeki basıncıarttırmaktadır. Yapılan çalışmada gerinime bağlı değişimlerin gözlemlenmesi ve etkilerinin incelenmesi amacıyla yüksek hassasiyetligerinim, sıcaklık sensörü ve Z-Wave haberleşme modülüne sahip bir sistem tasarlanmıştır. Pazarda yaygın olarak kullanılan birtaşınabilir telefonun bataryası üzerinde yaşlandırma testleri yapılmış ve 4.58 mm şişme sağlanmıştır. Fiziksel değişime maruz kalmışbatarya ile yeni bataryanın davranışları aynı şarj/deşarj döngülerine tabi tutularak şişmenin etkileri sunulmuştur. Yapılan ölçümler ilesıcaklık, şişme miktarı, açık devre gerilimi ve şarj/deşarj süresinin değişim miktarları detaylıca belirtilmiştir. Şişmeye maruz kalmışbataryanın şarj ve deşarj sırasında şişme miktarının değişimi ile yüzeyde ortaya çıkan yüksek sıcaklıklar sebebiyle kullanıcı içintehlikelerin ortaya çıktığı gösterilmiştir. Bu durum taşınabilir telefonlar ve bilgisayarlarda bir güvenlik faktörü olarak şişmenindesürekli takip edilmesi gerekliliğini ortaya çıkarmaktadır.
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    Publication
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    Article
    Citation - WoS: 0
    Sensorless control of permanent magnet synchronous generator drive using reduced switch inverter
    (Pamukkale Univ, 2019) Kivanc, Omer Cihan; Ozturk, Salih Baris
    The main aim of this paper is to provide electric power generation using a renewable and portable method in rural and geographically problematic areas where energy transmission is not possible. Electric power generation from wind with low-cost, efficient and portable small-scale wind turbine during natural disasters (earthquake, fire, flood, etc.) leading to catastrophic consequences (long electrical black-outs) and for individual low power applications is targeted. The control of gearless Permanent Magnet Synchronous Generator (PMSG) along with load side inverter control in this project are performed using a full-rating, bi-directional, two-level, back-to-back voltage source rectifier/inverter with total of eight switches for the variable speed wind turbine. Additionally, one of the major advantages and novelty of using MRAS rotor flux linkage and stator resistance estimator in this system is to correct changes in the flux and stator resistance values in the control system. Due to its simplicity and effectiveness, the load side control is achieved by using four switch grid side inverter. To observe the total system performance, a three-phase passive load is used at the inverter output. The low-pass LCL filter is designed and used in the load side to reduce current and voltage harmonics and increase stability and efficiency of the power network. The results of the overall system are validated with the real-time DSP system. It is proved with this paper that the inclusion of a simple, effective and economical position sensorless control in the generator side show that renewable wind energy system can be a viable distributed green energy solution for rural areas.
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    Article
    Stator Feedforward Voltage Estimation Based Sensorless Permanent Magnet Synchronous Generator Drive using Multi-Parameter Estimation Based on MRAS
    (2017) Kıvanç, Ömer Cihan; Öztürk, Salih Barış
    Bu makalede MRAS tabanlı çoklu-parametre tahmini ile güçlendirilmiş ileri beslemeli stator gerilim tahminine dayanan basit ve verimli bir sensörsüz sürekli mıknatıslı senkron generatör (SMSG) kontrol metodu geliştirilmiştir. Sürekli mıknatıslı senkron generatörün sürekli hal dq-ekseni stator gerilim eşitlikleri önerilen kontrol metoduna uygun olarak ileri beslemeli stator gerilim eşitlikleri haline dönüştürülmektedir. Çeşitli endütriyel uygulamalar için uygun ve basit bir yapısı olması nedeniyle SMSG'nin kontrolünde vektör kontrol sıkça kullanılmaktadır. Güç eşitliğinde maksimum güç, moment ve hızın bir fonksiyonu olarak ifade edilir. Önerilen yöntemde, arka arkaya bağlı konvertör yapısına sahip değişken hızlı rüzgar türbini sistemi, ortak DC-baraya bağlanmıştır. Bu makalede, önerilen sensörsüz kontrol metodu TMS320F28335 DSP tarafından kontrol edilen 1 kW PMSG sürücü ile gerçek zamanlı deneysel olarak nominal hızın %10'u (300 rpm) değerindeki düşük hızda çoklu parametre değişimi altında başarı ile gerçekleştirilmiştir
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    Conference Object
    Citation - WoS: 2
    New Generation Plug-in Cable Design and Product Development for White Goods - Cold Plug
    (Ieee, 2019) Kivane, Omer Cihan; Ozgonenel, Okan; Bostan, Omer
    Cables with today's technology and professional approach through many processes are becoming more reliable. Cables that are subject to special procedures in line with customer demand, safe use is maximized. The ends of the cables which are cut into groups and cut to certain sizes are crimped by opening at a certain point. At the end of these operations, the products are taken to the test area by socketing and then taping. For cables that have been tested for possible inactivity or non-contact condition, terminal crimping is carried out by specialized machines, professional equipment and specialized equipment with the use of the most suitable devices. This paper proposes a new crimping process for cables of household devices. The suggested crimp shape is tested mechanically and electrically. Mechanical tests cover pull-out tests whereas electrical tests consist of maximum load condition tests both in COMSOL (TM) and laboratory environment. According to test results, the proposed crimping shape fulfils the required standards.
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    Conference Object
    Citation - Scopus: 0
    PSO Optimized Nonlinear Control of DC Microgrid with Intelligent Energy Management System
    (Institute of Electrical and Electronics Engineers Inc., 2023) Yousaf,H.; Kivanc,O.C.
    To meet the United Nations climate stabilization goals by 2050, Clean Energy is playing a vital role to minimize global warming. This study proposes a Clean Energy DC Microgrid with a 2-level control structure. A high level controller consisting of Artificial Neural Network (ANN) based Energy Management System (EMS) with maximum power point tracking (MPPT) schemes and a local level Quick Reaching Law based Global Terminal Sliding Mode Controller (QRL-GTSMC). The Microgrid consists of a Fuel Cell (FC), Electrolyzer, Hydrogen Tank, Battery Energy Storage System (BESS), Photovoltaic (PV) array and a Wind Energy Conversion System (WECS). The inclusion of multiple Distributed Energy Resources (DER) increases the complexity of the system but also provides more flexibility. The proposed configuration provides a Hydrogen cycle with production, storage and utilization. The ANN EMS is trained by data accumulated through a State Logic Controller (SLC). The local level control laws are synthesized using QRL-GTSMC, and the resultant parametric variables are tuned by Particle Swarm Optimization (PSO) algorithm using Integral of Absolute Error (IAE) as the minimization performance index. The system's overall stability, response and performance is tested by introducing uncertainties in the form of changing weather conditions. The results are compared with conventional control technique without a reaching law. The proposed system has been evaluated using the MATLAB/Simulink environment. © 2023 IEEE.