Browsing by Author "Ustun, O."

Now showing 1 - 6 of 6

Citation Count: 0
Design and Manufacture of Electric Powertrain and Its Cooling System for ITU EV Project
(Ieee, 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.
Citation Count: 1
Dynamic control of electronic differential in the field weakening region
(Taylor & Francis Ltd, 2019) Kivanc, O. C.; Ustun, O.
A simple and dynamic electronic differential control method for an outer rotor motor driven electric vehicle based on fuzzy gain scheduling of PI gains method is proposed for constant torque and power region operation using brushless direct current (BLDC) machine. The proposed method is quite insensitive to torque fluctuations and transient speed oscillations due to surface mounted permanent magnet (SMPM) BLDC machines constraints in the field weakening region. To improve the dynamics and stability of the electronic differential system and eliminate the skidding of the wheels and reduce the heating of electric machine in the wide speed range operation, a robust control method is developed. Moreover, PI controller gains are updated continuously by fuzzy gain scheduling approach which has phase advance angle, steering angle and measured speed as controller input parameters in order to eliminate the errors caused from the variable road conditions and torque oscillations in the field weakening region. The proposed method is implemented with 2 x 1.5 kW BLDC motor drive controlled by a TMS320F28335 digital signal processor (DSP). The experimental results show that the proposed method exhibits greater stability under various load, road and vehicle speed conditions.
Citation Count: 1
In Pursuit of Proper BLDC Motor Design for Electric Bicycles
(Ieee, 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.
Citation Count: 9
On Regenerative Braking Capability of BLDC Motor
(Ieee, 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.
Citation Count: 0
The Search for Adaptive Methods Filtering Out High-Noises and Their Application on Oil Complexes' Control Telemetry Systems
(Ieee, 2013) Yilmaz, M.; Ustun, O.; Zada, P. Ali; 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.
Citation Count: 0
Valuations of Adaptive Methods for Filtering Out High-Noises in Oil Complexes Telemetry Systems
(Ieee, 2013) Tuncay, Ramazan Nejat; Yilmaz, M.; Mamedov, H.; Zada, P. Ali; Tuncay, R. Nejat; Enerji Sistemleri Mühendisliği / Energy Systems Engineering
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.