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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 An induction motor design for urban use electric vehicle(Institute of Electrical and Electronics Engineers Inc., 2016) Guneser, M.T.; Dalcali, A.; Ozturk, T.; Ocak, C.; Cernat, M.Because of fossil fuel shortage and its damages on environment, electric vehicles (EV) are going to be more popular in science and car industry as well. So, EV's take an opportunity to spread over the traffic finally. But battery, which is the main energy supplier of the motor, has disadvantages as big volume and weight. Scientists try to enhance energy densities, ranges and quicken charging. All of research results force us to drive EV in a loop, close to charging stations for near future. So EV's should be designed by considering urban road and speed conditions as well. In this survey, we designed a new two pole 7,5 kW induction motor for a certain electric vehicle, which was designed to use urban drive. We considered urban traffic rules and conditions, while designing the motor. We simulated and verified analytical and finite element analysis of the designed induction motor. We also modelled and simulated the EV with the induction motor on MATLAB to observe control performance of field oriented control (FOC) on several urban use scenarios. According to our results, EV with designed motor can be realized and controlled. © 2016 IEEE.Öğe Optimum rotor design of small PM BLDC motor based on high efficiency criteria(Asian Research Publishing Network, 2015) Saygin, A.; Ocak, C.; Dalcali, A.; Çelik, E.In the systems that are fed by batteries, the duration of the energy supplied to the system is of great importance. To use high efficiency-motors in these systems can extend the battery usage time and it can be said that obtaining high efficiency-motors used in low power applications is rather difficult. In this regard, in this paper, design and optimization of a brushless permanent magnet DC motor have been carried out successfully, especially for a system fed by battery. By considering the high efficiency criteria, rotor design parameters such as rotor geometry, thickness and placements of the magnets, and embrace factor have been carefully examined. By obtaining the optimal rotor geometry providing maximum motor efficiency, some informative theoretical and finite element analyses are carried out. Electrical and electromagnetic distributions gained by the changes in rotor design parameters are presented in graphics. As a result of successive steps in the paper, the efficiency is increased; the cogging torque and magnet consumption are reduced for the motor under consideration, which is 20W, 24V, 3000 rpm with an inner-type rotor. © 2006-2015 Asian Research Publishing Network (ARPN).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.
