Sürdürülebilir Kalkınma Amaçları

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• Derleme MakaleYalnız künye2023Scopus SJRQ3/r/bayburt/12984
  An overview of frequency-based power split strategies in electric vehicles with battery/supercapacitor hybrid energy storage system

  Çorapsız, Muhammed Reşit; Kahveci, Hakan

  Energy management in hybrid energy storage systems (HESSs) consisting of battery and supercapacitor packages has an essential role in the efficient and safe use of energy storage devices. In the mentioned HESSs, with frequency separation-based energy management, the source with slow dynamics (eg, batteries) is supported by other sources with fast dynamics (eg, supercapacitors). To realize power sharing in the battery/supercapacitor HESS, the load current is divided into low- and high-frequency components and supplied/allocated from energy storage devices. This review touches on the historical development of electric vehicles and includes extensive information about the battery and supercapacitor. It also comprehensively analyzes frequency separation-based power allocation strategies for battery/supercapacitors HESS. These strategies were investigated in detail regarding their features, advantages, and restrictions. In addition, interconnection circuit topologies and control techniques used in frequency-based power allocation were explained comprehensively. As a result, this study will serve as a guide on frequency-based power separation principles in HESS.

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  AtıfScopus23·WoS14·OpenAlex22

  İncele
• MakaleAçık Erişim2023Scopus SJRQ3/r/bayburt/11793
  A study on Li-ion battery and supercapacitor design for hybrid energy storage systems

  Çorapsiz, Muhammed Reşit; Kahveci, Hakan

  This paper discusses a generic design of lithium-ion (Li-ion) batteries and supercapacitors, which are important sources for energy storage systems (ESS). The main contribution of this study is to compare the available and experimental models for batteries and supercapacitors operating under continuous charge or discharge conditions. Even though the available models show similar behavior to the experimental ones in short-term or pulsed discharge conditions, this situation may be different in continuous discharge conditions. For this purpose, the optimal electrical equivalent circuits of energy storage devices were constituted and modeled in the MATLAB/Simulink environment. Then, the electrical equivalent circuit parameters were approximately calculated with the help of dynamic equations. Finally, the model parameters were estimated using Nonlinear Least Squares Method (NLSM) and Trust Region Reflective Algorithm (TRRA). When the obtained results were evaluated together, it has been observed that the electrical equivalent circuit models (EECM) more accurately reveal the transient and steady states of energy storage devices compared to the available models, especially under continuous discharge conditions.

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  AtıfScopus33·WoS30·OpenAlex33

  İncele
• MakaleAçık Erişim2022Scopus SJRQ1/r/bayburt/12930
  Double adaptive power allocation strategy in electric vehicles with battery/supercapacitor hybrid energy storage system

  Çorapsız, Muhammed Reşit; Kahveci, Hakan

  This paper proposes a new energy management strategy (EMS) for electric vehicles (EVs) with battery/supercapacitor hybrid energy storage systems (HESS). Firstly, the battery/supercapacitor HESS configuration and obtaining the load current from the driving cycle are comprehensively explained. Secondly, fixed and adaptive frequency-based (AFB) EMS are discussed in detail. In the proposed method, the current demanded by the load is separated into low and high-frequency components with the help of an adaptive low-pass filter (A-LPF). In addition, adaptive battery current (ABC) is generated according to the supercapacitor (SC) state of charge (SoC), and a double adaptive power allocation strategy is performed. The proposed method is compared with the AFB-EMS for load currents, load powers, DC link voltages, filter cut-off frequencies, battery, and SC SoCs on the UDDS driving cycle. When the obtained results were evaluated together, it was observed that the proposed method completed the driving cycle with a higher battery SoC and realized the adaptive cut-off frequency in a narrower band.

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  AtıfScopus14·WoS12·OpenAlex14

  İncele
• MakaleAçık Erişim2022Scopus SJRQ3/r/bayburt/12103
  Performance Analysis of Buck-Boost and SEPIC Converter for Commutation Torque Ripple Minimization in BLDC Motors

  Çorapsız, Muhammed Reşit; Kahveci, Hakan

  This paper discusses comparative analysis of Buck-Boost and SEPIC (Single Ended Primary Inductance) converters used in DC link voltage control technique to reduce torque ripple in Brushless Direct Current Motors (BLDCM). The aim of this study is to prove the efficiency of the aforementioned two converters, which have been adopted in many studies to reduce torque ripples caused by commutation, on the same motor parameters. Although BLDCM has many advantages, ripples in the generated torque have limited the use of these motors in applications requiring precise speed and torque. In this study, BLDCM was analyzed exhaustive mathematically and electrically and the problem that caused commutation torque ripples was explained in detail. The DC link voltage control has been proposed to suppressing torque ripples in the BLDCM. In addition, the link voltages required for reducing the torque ripples were obtained separately via both the Buck-Boost and the SEPIC converters. These converter topologies are examined under certain speed and torque conditions and the results were compared. When the results are evaluated together, it was observed that both converters performed the very closely performance each other. However, the Buck-Boost converter produced the desired voltage levels with less oscillation than the SEPIC converter.

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  AtıfScopus5·WoS2·OpenAlex3

  İncele
• MakaleAçık Erişim2020/r/bayburt/14843
  An Experimental Study to Determine the Relationship Between Power Factor and Harmonic Distortion in Single-Phase AC Voltage Controller

  Çorapsız, Muhammed Reşit; Kahveci, Hakan; Çorapsız, Muhammed Fatih

  This paper deals with the determination of the relationship between the power factor and the harmonic distortion in a single-phase AC (SPAC) voltage controller. The aim of this study is to investigate the change of power factor (PF) and total harmonic distortion (THD) during different phase triggering angles (PTA). Firstly, the advantages of using thyristor instead of triac in single-phase AC voltage controllers operating at high frequencies are mentioned. Secondly, the power factor and total harmonic distortions for single-phase AC voltage controllers are theoretically examined. Finally, the relationship between power factor and total harmonic distortion are demonstrated by both simulation and experimental studies. However, it is monitored that, at lower output voltages, the power factor (PF) is pretty much reduced and total harmonic distortion (THD) is significantly increased.

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• MakaleAçık Erişim2020/r/bayburt/14619
  Voltage Control of Cuk Converter with PI and Fuzzy Logic Controller in Continuous Current Mode

  Çorapsız, Muhammed Reşit; Çorapsız, Muhammed Fatih; Yilmaz, Mehmet

  In today's energy systems, many equipment operates with Direct Current (DC) voltage. However, it is not always possible to obtain the voltage level required for the operation of these equipment from standard power supplies. For this reason, DC-DC converters are used to achieve the desired voltage values for equipment with different DC voltage levels. These converters are divided into three general categories, named Buck, Boost and Buck-Boost. The most preferred converter is the Cuk converter with low output ripple voltage, which can operate in both buck and boost modes. In this study, a detailed analysis of the Cuk converter, which is frequently used in Photovoltaic (PV) Panels was performed and different control methods of the output voltage were proposed. While performing this analysis, the dynamic model of the Cuk converter was created in which, Proportional-Integral (PI) and Fuzzy Logic (FL) are used to control the output voltage of the Cuk converter. The performances of both controllers were compared with respect to performance parameters such as steady state error, settling time and rise time. When the results obtained were evaluated as a whole, it was observed that FLC achieved the desired reference with less rise and settling time. In this study, modeling and controller applications of Cuk converter are realized by using MATLAB / SIMULINK program.

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  AtıfOpenAlex8

  İncele
• MakaleAçık Erişim2019/r/bayburt/15150
  Analysis and Suppressing Speed Fluctuations in Brushless DC Motors

  Çorapsız, Muhammed Reşit; Kahveci, H.; Fatih Çorapsız, M.

  The fluctuations in both speed and torque magnitudes during operation are among the major disadvantages of brushless DC motors. These fluctuations occur due to both the commutation of the inverter switches and the phase winding inductances. This case can lead to major problems, especially in applications which are required constant speed and constant torque. In this work, it was aimed to reduce speed fluctuations that occur in brushless DC motors. Firstly, the simulation model was created by using the dynamic equations of the brushless DC motor. Secondly, a region selective circuit was designed for use in commutation regions. Finally, the commutation signals were generated from the magnitude of the torque produced by the motor. Consequently, the proposed technique was controlled under different speed conditions and was shown that the speed fluctuations can be reduced without the difficult calculations of the commutation time. According to the results obtained, it was observed that the speed fluctuations were significantly reduced.

  AtıfOpenAlex3·TR Dizin1

  İncele
• BildiriAçık Erişim2017/r/bayburt/12232
  The speed control of DC motor under the load condition using PI and PID controllers

  Corapsiz, Muhammed Reşit; Kahveci, Hakan

  In this study, it was aimed to compare PI (Proportional-Integral) and PID (Proportional-Integral-Derivative) controllers for speed control of Permanent Magnet Direct Current (PMDC) motor under both load and without load. For this purpose, firstly, the mathematical model was obtained from the dynamic equations of the PMDC motor and the obtained mathematical model was transferred to the simulation environment and modeled using Matlab/SIMULINK. Following the modeling process, PI and PID controller structures were formed, respectively. Secondly, after these structures were formed, the PMDC motor was run without any controller. Then, the control of the PMDC motor with no load was provided by using PI and PID controllers. Finally, the PMDC motor were loaded under the constant load (TL = 3 N.m.) for each condition and selected time period (t = 3 s). The obtained result for each control operations was comparatively given by observing effects of loading process on systems. When the obtained results were evaluated for each condition, it was observed that PID controller have the best performance with respect to PI controller.

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  AtıfScopus3·OpenAlex4

  İncele
• MakaleYalnız künye2016/r/bayburt/15457
  EKDZ modelinin farklı bina dağılımları içeren senaryolara uygulanarak eğim kırınımı etkisinin araştırılması

  Tabakcıoğlu, Mehmet Barış; Çorapsız, Muhammed Reşit

  Bu çalışmada, karasal radyo yayıncılığında kullanılan bazı yayılım modelleri kısaca anlatılacak, daha sonra EKDZ veUKT yayılım modelleri kullanılarak benzetimler yapılacaktır. Bu benzetimler için kullanılacak senaryolar bazıistatistiksel ve geometrik dağılımlar kullanılarak belirlenecektir. Bu dağılımlar üzerinden yapılacak benzetimlersonucunda eğim kırınımı etkisi tartışılacaktır.

  AtıfTR Dizin1

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