Browsing by Author "Ustun,O."

Now showing 1 - 13 of 13

Citation Count: 0
Car and renewable energy storage accumulators active life extension for hazardous wastes eco-impact minimization
(2010) Ustun,O.; Yilmaz,M.; Ali-Zada,P.; Tuncay,R.N.; Mamadov,H.
The chemical nature of an accumulator battery is likely to defeat the ability to charge. Traumatic damage is being caused to the environment by the accumulator waste-pollutants: sulfuric acid and lead from the accumulators. Similar problems arise with different types of accumulators (NiCd, NiMH, Li-ion, Li-Polymer, etc.) This leakage seeps into waterways, soil and the air of the living beings, animals, birds and humans, especially to children. The paper outlines an examination of a cheap and smart experimental charging-discharging device, which helps getting a significant extension of the active life of car and renewable energy storage accumulators, as well as known methods, therefore minimizing the environmental impact of batteries wastes. Having known the limiting crystallization, it is possible to extend the battery active life cycles more than three times, provide a remediation of these environmental polluting effects and diminish the environmental impact of accumulator hazardous wastes on living organisms. © Copyright 2011 IEEE - All Rights Reserved.
Citation Count: 9
Comparison of different line start interior permanent magnet synchronous motor types with respect to IE4 efficiency class
(Institute of Electrical and Electronics Engineers Inc., 2017) Ustun,O.; Bayram,D.; Durak,B.; Kivanc,O.C.
Recently, the increasing requirements and tendencies of higher efficiency systems have caused a substantial impact on electric motor design. Designers tend to change their views on motor topologies to provide the predetermined values of higher efficiency classes (such as IE3, IE4, IE5). Line-start interior permanent magnet synchronous motors (LSIPMSM) are strong candidates for higher efficiency class general purpose motors due to their higher MTPA (maximum torque per ampere) values. In this study, three different rotor types of LSIPMSM, i.e. V-magnet type, spoke-magnet type and rectangular-magnet type, are investigated with regard to efficiency requirements of super premium efficiency class (IE4). The impact of designs on rotor cage which is essential for starting and synchronization is also studied. The electromagnetic design study is conducted and then the optimized designs are manufactured and tested. The most applicable motor type is determined by means of its ease-of-manufacture and low cost features. © 2017 IEEE.
Citation Count: 4
Design and implementation of an electric actuated valve for precise fluid control
(Gazi Universitesi, 2019) Kivanc,O.C.; Ustun,O.; Tosun,G.; Oguz,E.; Mutlu,Y.
Fluid control is one of the essential automation application area in industry. In order to fluid control effectively and precisely, valves which are crucial components, need a controlled rotating motion which leads to implement electric motors, electronic controller and gear systems altogether. In this study, an electric motor actuated valve system is designed and prototyped. The design phases are including switch mode power supply (SMPS) design, motor controller circuit design, mechanical implementation and controller design. The designed valve system is manufactured and tested using multi-disciplinary fashion. The application problems are solved by using the proper control techniques and strategies. The precise position control of butterfly disc is also achieved. According to the related industrial standard and application requirements, the experimental results show the effectiveness of the design approach. © 2019, Gazi University Eti Mahallesi. All Rights Reserved.
Citation Count: 32
Design and implementation of an electric drive system for in-wheel motor electric vehicle applications
(2011) Tuncay,R.N.; Gökçe, Can; Yilmaz,M.; Gokce,C.; Karakaya,U.; Otomotiv Mühendisliği / Automotive Engineering
This paper presents the design and application of a hub drive system for Hybrid (HEV) and All Electric Vehicles (EV). Initially Matlab SIMULINK model of a hub driven hybrid electric vehicle is developed and the performance values are calculated. Two 15 kW brushless dc machines (BLDC) are designed and manufactured to be located inside the rim of the wheels. The performance tests of these wheels are conducted in laboratory environment. Then, two separately driven rear wheels are mounted to Fiat Linea vehicle. The mechanical differential is replaced by an electronic control technique, which bases upon the detection of the angle of steering wheel. A CAN bus communication is established between the control system of electric drive and Electronic Control Unit (ECU) of the vehicle. The concerted action between electrically driven rear-wheels and Internal Combustion Engine (ICE) driven front axle is achieved. Finally some preliminary road tests are executed and encouraging test results are obtained. The design optimizations between ICE, Electric Drive and Battery Power for various drive cycles are investigated. © 2011 IEEE.
Citation Count: 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.
Citation Count: 5
Design of a position controlled electric actuator used in fluid control valves
(Institute of Electrical and Electronics Engineers Inc., 2016) Tosun,G.; Kivanc,O.C.; Oguz,E.; Mutlu,Y.; Ustun,O.
Valves are the main elements for controlling fluids in industry and other application areas. To control flow precisely, valves need a controlled action which leads to implement actuators, gear systems and electronic controllers. Increasing dominance of electrical actuators due to the advantages of easy control and intervention and space-efficient designs brings seldom implementation of hydraulic and pneumatic actuation. In fluid control applications, the main target is to obtain the right position, i.e. angle for rotary actuators, for adjusting flow rate. In this study, the design and implementation of a position controlled electrically actuated valve used for fluid control are presented. The design phases of system universal power supply and electronic control system are given and the experimental results of position control which are representing the validation the design study is also discussed. Also a special current control scheme is used to overcome transient disruptions. © 2016 IEEE.
Citation Count: 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.
Citation Count: 0
Evaluation of Developments in Vehicle Active Suspension Actuators and Control Systems Based on Patent Information Analysis Approach
(Institute of Electrical and Electronics Engineers Inc., 2019) Tuncay, Ramazan Nejat; Nejat Tuncay,R.; Ustun,O.; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
Patent information is the term given to the technical and legal information that can be found in patent documents. Using patent information can help make informed decisions when choosing strategies for researching or developing new products. Patent information can be used to find out what already exists and build on it, find technology and market trends as early as possible, and avoid infringing patent rights of competitors. In this paper, the developments in actuators and control systems used in vehicle active suspensions are investigated based on the statistics obtained from the Cooperative Patent Classification (CPC) scheme. This patent information-based study can be repeated for any technology or product. © 2019 Chamber of Turkish Electrical Engineers.
Citation Count: 0
Exciting system selection for brushless synchronous machine
(2012) Ustun,O.; Ozturk,S.B.; Kivanc,O.C.; Ali Zade,P.G.; Tuncay,R.N.
The paper deals with the special brushless synchronous electrical machine (SBSM) working with an extensive variable load. It's exciting systems usually keep cosθ ≈ 1. Among them are unmanned deep-well oil pumps drives, wind renewable energy SBSM, etc. The SBSMs usually works in harsh climate conditions, where thyristor or IGBT exciting systems are not reliable (except diodes). Oil field drives are supposed to have fire/explosion-proof brushless motors. It is shown in this paper that replacement of induction motors (IMs) with the special brushless synchronous motors (SBSM) with stable cosθ ≈ 1 in the sucker-rod pumps (SRPs) will help to cut energy losses and diminish voltage pulsations in the oil field electric network. It also results in some reduction of oversize motor utilizations. The main proposal of this paper is to avoid any controlled electronic exciting system, but at the same time obtain the stabilizing cosθ ≈ 1 effect by application of the special small construction change in the motor.
Citation Count: 4
In pursuit of proper BLDC motor design for electric bicycles
(Institute of Electrical and Electronics Engineers Inc., 2016) Ustun,O.; Tanc,G.; Kivanc,O.C.; Tosun,G.
In this paper, an electric bicycle motor design study is presented according to the related standard. Fundamental dimensions and characteristics are kept within some certain boundaries by means of motor rated power and physical constraints arising from standard bicycle sizes available on the market. Slot/pole ratios and winding configurations are investigated comprehensively in order to obtain a proper design of electric motor due to the facts of pedal assisted electric bicycle application. After defining the motor parameters and the materials that are used the motor design an optimisation attempts are undertaken by using an analytical solver which is employing both numerical calculations and finite element method (FEM) analyses. Motor designs are assessed based on torque production, weigh, efficiency and ease-of-manufacture. A concise experimental study is conducted for prototype motor in order to evaluate validity of design study. © 2016 IEEE.
Citation Count: 17
On regenerative braking capability of BLDC motor
(IEEE Computer Society, 2016) Kivanc,O.C.; Ustun,O.; Tosun,G.; Tuncay,R.N.
The solution for range problems in electric vehicles is implying two essential approaches: consuming electrical energy with maximised efficiency and regenerative braking. Regenerative braking can be implemented by using the any converter used for electric motor control without needing an extra power circuit. To accomplish recovering electrical energy from mechanical energy a voltage boosting operation is necessary which is causing the current flow from induced voltage due to the mechanical motion to battery. In this study, a brushless DC (BLDC) motor drive system used for light electric vehicle propulsion is modeled by considering non-linear effects. The developed model of the motor drive system is used for defining the upper limits and constraints of operation. Analytic calculations and simulation results represent the operation modes of the system when regenerative braking is applied. © 2016 IEEE.
Citation Count: 0
The search for adaptive methods filtering out high-noises and their application on oil complexes' control telemetry systems
(2013) Yilmaz,M.; Ustun,O.; Ali Zada,P.; Tuncay,R.N.
This paper's domain is the application of well-known modern applied mathematical methods in a control structure of oil industry. Electrical Submersible Pumps (ESP) telemetry system allows for the obtaining of information in the neighborhood of different heavy electromagnetic noises. The telemetry system needs to receive accurate information on the pump unit's intake pressure, temperature and most importantly for the submersible electric motor, the stator cooling oil insulation resistance, for the successful exploitation of the ESP. But increasing disturbance levels with the corrupted analog telemetry signal are resulting in increasing noise levels; however, often it is still audible or the control is still reliable. Though, beyond a certain disturbance level, the so-called digital cliff, the digital telemetry signal and control may stop abruptly (Fig. 1). In this paper, an analog signal processing implementation was researched for the detection of the most efficient adaptive noise-cancelling filters among dozens of recognized ones for oil industry ESP telemetry systems of under severely noisy conditions. From ten applied adaptive filter algorithms, only three have shown successfully good results in the early prediction of the ESP electric motor real insulation disruption. © 2013 IEEE.
Citation Count: 0
Valuations of adaptive methods for filtering out high-noises in oil complexes telemetry systems
(IEEE Computer Society, 2013) Ustun,O.; Yilmaz,M.; Mamedov,H.; Zada,P.A.; Tuncay,R.N.
The ESP telemetry system needs to receive accurate information on the pump unit's intake pressure, temperature and most importantly the electric motor stator cooling oil insulation resistance, for the successful exploitation of the ESP. The increasing disturbance levels with the corrupted analog telemetry signal are resulting in increasing noise levels; however, often it is still audible or the control system is still reliable. Beyond a certain disturbance level - digital cliff, the digital telemetry signal and control may stop abruptly. From ten applied adaptive filter algorithms, only three have shown successfully good results in the early prediction of the ESP electric motor real insulation disruption. © 2013 IEEE.