Geri Dönüşlü DC-DC Dönüştürücünün Genelleştirilmiş Düğüm Denklemleri ile Analizi

Year 2019, Volume: 22 Issue: 1, 179 - 184, 01.03.2019

Hakan Köseni Ali Bekir Yıldız

https://doi.org/10.2339/politeknik.403992

Cited By: 4

Abstract

Bu çalışmada, güç elektroniği devrelerinde yaygın
olarak kullanılan geri dönüşlü (Flyback) DC-DC dönüştürücü devresinin analizi
için etkili bir yöntem ileri sürülmüştür. Yöntemin etkinliği, dönüştürücü
içerisindeki temel elemanların uygun şekilde modellenmesinden
kaynaklanmaktadır. Dönüştürücü devresinin en temel parçası olan transformatör
bağımlı kaynaklarla, anahtarlama elemanları ise iki değerli eleman yaklaşımı
ile modellenmiştir. Anahtarlama elemanlarının konumlarına göre eşdeğer
devredeki değişimler incelenmiştir. Analize temel oluşturan sistem
denklemlerinin elde edilmesinde, genelleştirilmiş düğüm yöntemi kullanılmıştır.
Sayısal sonuçlar, kalıcı hal bölgesindeki geleneksel analitik sonuçlarla
karşılaştırılarak, ileri sürülen yöntemin üstünlüğü gösterilmiştir.

Keywords

Geri dönüşlü DC-DC dönüştürücü, genelleştirilmiş düğüm analizi, modelleme

Analysis of Flyback DC-DC Converter by Modified Nodal Equations

Abstract

In this study, an efficient method is proposed for
analysis of Flyback DC-DC converter circuit, used commonly in power electronic
circuits. The efficiency of the method comes from modelling basic components in
the converter properly. Transformer, the basic component of the converter, is
modelled by dependent sources, switching devices are modelled by the binary
valued element approach. Variations in the equivalent circuit according to
status of the switching devices are examined. In obtaining system equations,
being the basis of the analysis, the modified nodal method is used. Numerical
solutions are compared with traditional analytical results in steady-state. The
superiority of the proposed method is shown.

Keywords

Flyback DC-DC converter, modified nodal analysis, modelling

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