Browsing by Author "Tosun,G."

Now showing 1 - 6 of 6

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: 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: 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.