Browsing by Author "Uygun D."

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An effective speed controller and GPRS based data acquisition system design for DC motors
(2020-03-01) Cetinceviz Y.; Uygun D.; Gungor Y.
Parallel to the scientific and technological development, control over hardware used in industry and in daily life is being realized by using remote-controlled systems. Internet, mobile communications, and infrared and wireless control systems are often preferred. The control of a direct-current motor (DCM), which has become a part of our daily life, is achieved using a Pocket PC and General Packet Radio Service (GPRS). An Internet-based human-machine interface constitutes an embedded Visual Studio, which includes Windows CE 5.0 software and Smartphone and Pocket PC applications. An application server protocol is created using basic principles of GPRS control or communication system control. Client software is developed, real-Time torque, speed, power, and current of a DCM are monitored, and motor speed control is performed using a monitoring system written in the C# language without using any additional equipment. The proposed system offers the possibility of real-Time monitoring in a cost-effective manner.
Design and simulation of an internet-based interactive controlling and monitoring system for educational purposes using SCADA
(2011-01-01) Bayindir R.; Cetinceviz Y.; Uygun D.
In this paper, we purpose a web based communication system between a laboratory on server side and students on client side in order to teach students how to use various process control environments in which FieldBus communication systems are widely used to interconnect them. Web-based remote access to the system and the controlling/monitoring of the process has been provided by using SCADA (supervisory control and data acquisition) control. In order to emphasize the effectiveness of this remote laboratory, a conveyor system which is controlled by an asynchronous motor driven by industrial wireless module and in which an optic, an inductive, a magnetic and a capacitive sensor exist has been used. A programmable logic controller (PLC) was used to control the operation of the system. SIMATIC MANAGER software inclusive of S7-PLCSIM Simulating Modules for PLC programming and simulating system, WinCC flexible visualization software and Sm@rtService option for web-based remote monitoring and control opportunities have been used. © 2011 Praise Worthy Prize S.r.l. - All rights reserved.
Dual stator/rotor brushless DC motors: A review of comprehensive modelling based on parametric approach and coupled circuit model
(2016-03-07) Uygun D.; Solmaz S.; Cetinceviz Y.
This paper proposes a dual-rotor brushless direct-current motor design specifically realized for unmanned underwater vehicles. Brushless DC motors are known for their high torque capacity and power density specs which are also suitable for underwater drive trains known as thrusters. Proposed brushless DC motor model having double rotor and double stator structure is basically designed by applying typical design procedure including sizing equations followed by detailed parametric analysis approach and coupled circuit model. Design of a dual-rotor brushless DC thruster having foregoing structure utilizes modular concentrated winding, optimized slot-opening and pole/slot ratio, outer and inner diameter and etc. Main output parameters such as rated torque, rated power, rated speed and total loss parameter of each brushless DC motor for different rotor positions are computed and compared. Additionally, a coupled-circuit analysis is employed to show the impact of the proposed design to evaluate rated power and torque capability.
Multi-criterion design and 2D cosimulation model of 4 kW PM synchronous generator for standalone run-of-the-river stations
(2015-01-01) Cetinceviz Y.; Uygun D.; Demirel H.
This study reports the analytical computation including performance characteristics such like load line voltage and output power in combination with coupled-field circuit analysis of a 4kW direct drive permanent magnet synchronous generator (PMSG) to be used in a micro-scale run-of-the-river-station application. The specifications such like slot opening, pole embrace and magnet length of PMSG are optimized by using parametric approach including multi-criterion design optimization. Based on the optimized design, the model has been exposed to some transient coupled-field circuit analyses based on variable river flow speed and variable ohmic load conditions. The analytical studies related to finite element methods and conducted parametric approaches verified the effectiveness of the employed dynamic co-simulations.
Optimal design and verification of a PM synchronous generator for wind turbines
(2017-01-01) Cetinceviz Y.; Uygun D.; Demirel H.
This study reports the analytical computation including performance characteristics under no-load condition in combination with coupled 2D electromagnetic field-circuit analysis of a 4kW direct drive permanent magnet synchronous generator (PMSG) to be used in micro-scale wind turbine applications. The specifications such like stack length, skew and magnet offset of PMSG are optimized by using parametric approach including multi-objective design optimization. It describes the methodology to gain required output performance such as output power, load voltage and maximum efficiency of the wind generator. Based on the optimized design, the model has been exposed to some transient coupled-field circuit analyses based on variable wind flow speed under no-load conditions. In addition to these evaluations; the experimental results verified the effectiveness of the employed simulations model related to finite element methods and analytical studies showing that that the induced voltage at nominal speed and no-load condition is at desired level and results obtained under no-load condition are in good agreement with the analysis and analytical results.
Optimization study on a 0.6 kW PMSG for VAWTs and determination of open and short circuit performances by using external circuit method
(2016-08-03) Uygun D.; Cetinceviz Y.; Bal G.
As is known, machine design is a time-consuming and complicated process. And consequently, the verification of the designs and machine performances with known optimization methods prior fabrication are becoming more complex and expensive. Relating to this issue, many studies have been achieved to realize optimization and analyze dynamic performance of the designed machines. In this paper, optimization and short/open circuit fault analysis along with transient performance of a designed 0.6 kW radial flux permanent magnet synchronous generator (RFPMSG) for a stand alone wind turbine was studied. The main feature of this study is to use RMxprt dynamic generator model which is linked with the ANSYS Simplorer external circuit simulator. The co-simulation method has been used to analyze the performance of the generator considered for feeding an ohmic load. This method also yields the waveforms of load voltages and load currents for different load and wind speed conditions along with experimental studies.
Transient analysis with coupled field-circuit model and experimental assessment of a PMSG used in small-scale wind turbine for water heating purpose
(2019-12-01) Cetinceviz Y.; Sehirli E.; Uygun D.; Ocak C.; Demirel H.
This paper introduces the detailed coupled field-circuit analysis including performance characteristics of a 4-kW in-running rotor permanent magnet synchronous generator (PMSG) used in rural-type small-scale wind turbines for water heating purpose. The content of the work consists of design, analysis, optimization, production and testing processes and validation studies. An integrated 2D electromagnetic field and circuit model are used in the design and analysis processes. The electrical machine design involves complex and time-consuming processes. This model provides comprehensive information on machine behavior under different conditions and is an effective to demonstrate compliance with real load conditions prior to the manufacture. The goal of the optimization process is to find a design that offers cost, manufacturability and efficiency as well as generator output values. For this, a multiobjective optimization approach has been used. Typical design and simulation principles are applied to the designed PMSG, respectively, including calculation and evaluation of various output parameters for different simulated wind speed rates and varying load conditions. Furthermore, the analytical studies related to finite element methods and parametric approaches are presented in collaboration with experimental studies carried out for different load rates.