Elektrikli Araçların Kablosuz Güç Transferi Sistemi için Dairesel Bobinli Bir Transformatörün Tasarımı ve Veriminin Analizi

Kablosuz Güç Transferi (KGT), elektrik enerjisinin iletkenlere ihtiyaç duyulmadan aktarılmasıdır. KGT zamanla değişen elektrik, manyetik veya elektromanyetik alanlar kullanan teknolojilere dayanır. Bu teknolojilerde güç, kısa mesafelerde, manyetik alan ve bobinler arasındaki endüktif kuplaj yoluyla veya elektrik alan ile metal elektrotlar arasındaki kapasitif kuplaj yoluyla aktarılabilmektedir. Diğer bir ifade ile bu sistemin temel çalışma prensibi manyetik rezonansa (MR) dayanmaktadır. Endüktif kuplaja dayalı KGT sistemi, kısa mesafelerdeki elektrikli cihazların şarj edilmesi için kullanılmaktadır. Bu teknolojinin gelişmesi, endüktif kuplajlı güç aktarım sistemini elektrikli araçların şarj uygulamaları için vazgeçilmez hale getirmiştir. Bu çalışmada, elektrikli araçlardaki şarj uygulaması için KGT sisteminin verimliliğini etkileyen faktörler analiz edilmiştir. KGT sisteminde kullanılan transformatörlerin karmaşıklığı nedeniyle, karşılıklı endüktans ve kuplaj katsayısının hesaplanmasını kolaylaştırmak için Sonlu Elemanlar Yöntemi (SEY) kullanılmıştır. Bunun için bir elektrik devresini doğrusal olmayan bir eleman modeliyle birleştiren bir simülasyon modeli ANSYS yazılım paketi kullanılmıştır. Dairesel bobinli bir KGT transformatör modeli, Ansys-Maxwell yazılımında modellenmiş ve farklı koşullar altında simüle edilmiştir. Ayrıca tasarlanan KGT sisteminin performansı analiz edilmiştir.

Anahtar Kelimeler:

KGT, Transformatör, Manyetik rezonans, SEY

Design and Efficiency Analysis of a Circular Coil Transformer for Wireless Power Transfer System of Electric Vehicles

Wireless Power Transfer (WPT) is the transfer of electrical energy without the need for conductors. WPT relies on technologies that use time-varying electric, magnetic or electromagnetic fields. In these technologies, power can be transferred over short distances by inductive coupling between the magnetic field and coils or by capacitive coupling between the electric field and metal electrodes. In other words, the basic working principle of this system is based on magnetic resonance (MR). WPT system based on inductive coupling is used for charging electrical devices over short distances. The development of this technology has made the inductive coupling power transmission system indispensable for charging applications of electric vehicles. In this paper, the factors affecting the efficiency of the WPT system for the charging application in electric vehicles are analyzed. Due to the complexity of the transformers used in the WPT system, the Finite Element Method (FEM) is used to facilitate the calculation of mutual inductance and coupling coefficient. For this, a simulation model ANSYS software package is used, which combines an electrical circuit with a nonlinear element model. A circular coil WPT transformer model was modeled in Ansys-Maxwell software and simulated under different conditions. In addition, the performance of the designed WPT system has been analyzed.

Keywords:

WPT, Transformer, Magnetic resonance, FEM,

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