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Öğe CAD-based design, analysis and experimental verification of an out-runner permanent magnet synchronous generator for small scale wind turbines(2012) Uygun, D.; Ocak, C.; Cetinceviz, Y.; Demir, E.; Gungor, Y.This paper presents the CAD-based design procedure, analysis and experimental verification of a 1 kW out-runner permanent magnet synchronous generator (PMSG) with radial magnetic flux for small-scale wind turbine systems. Firstly, the CAD and mechanical model used in the design procedure of the PMSG are presented. The generator is designed via developed CAD-procedure and design interface in which the basic parameters of the generators are calculated respectively. And then the effectiveness of the interface is supported by applying a coupled transient electromagnetic procedure using finite element method and the design and simulation principles presented apply primarily to the prototype model. Furthermore, the test results of the prototype permanent-magnet generator are analyzed and compared with the calculated data and characteristics. The purposed model is particularly well suited for low-speed wind turbine systems with low-starting torque. © 2012 IEEE.Öğe The development of GPRS based speed regulator for DC motor(2013) Uygun, D.; Gungor, Y.; Cetinceviz, Y.; Ocak, C.In this study, the establishment of a control platform for DC motor has been carried out with a personal digital assistant (PDA) using GPRS (General Packet Radio Service). The man-machine interface is achieved with embedded Visual Studio 2005 which includes the Pocket PC 2003, Smartphone 2003 and Windows CE 5.0 software applications. The protocol of application server was created by using basic principles of GPRS control, the client software was performed and the real time torque and speed control of DC motor was realized on a monitor system written on C# language and prepared without using any additional equipment. It was observed that the GPRS protocol used in system control provided many advantages in both time and cost. © 2013 IEEE.Öğe Multi-criterion design and 2D cosimulation model of 4 kW PM synchronous generator for standalone run-of-the-river stations(Institute of Electrical and Electronics Engineers Inc., 2015) 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. © 2015 IEEE.Öğe Optimal design and verification of a PM synchronous generator for wind turbines(International Journal of Renewable Energy Research, 2017) 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.Öğe Performance aspects and verifications of in-runner and out-runner permanent magnet synchronous generator designs of the same magnet structure for low speed wind systems(2012) Ocak, C.; Uygun, D.; Cetinceviz, Y.; Demir, E.; Gungor, Y.This study is carried out to realize the design procedure, analysis and performance verification of in-runner and out-runner permanent magnet synchronous generators (PMSG) with radial magnetic flux for low speed wind turbine systems. Primarily, the mechanical models used in the design procedure of the PMSG are presented. The basic parameters of the generators are calculated respectively and the generators are designed. And then, a coupled transient electromagnetic procedure using finite element method and the design and simulation principles are applied primarily to the prototype models. The derived simulation data from both models are compared and the results are discussed. For all investigated power scales, it is possible to get higher output power and torque by applying the internal rotor configuration for the same permanent magnet (PM) geometry and characteristic. Besides, the external rotor PM configuration is superior to the internal rotor PM configuration and has lower total weight and cost as well. © 2012 IEEE.