saujs Sakarya University Journal of Science 2147-835X Sakarya University 10.16984/saufenbilder.277598 Engineering Mühendislik Small signal analysis of peak current mode controlled Zeta converter Tepe akım modu kontrollü Zeta dönüştürücünün küçük işaret analizi Yılmaz Abdurrahman YILDIZ TEKNİK ÜNİVERSİTESİ Garip Muhammet YILDIZ TEKNİK ÜNİVERSİTESİ 04 01 2017 21 2 270 277 12 13 2016 03 01 2017 Copyright © 1997, Sakarya University Journal of Science 1997 Sakarya University Journal of Science

In this study, small signal analysis of peak current-mode controlled, non-isolated Zeta converter is presented. The PWM-switch model in Continuous Conduction Mode (CCM) is utilized in the analysis. The control to output voltage transfer function is derived in symbolic form including the esr of the output capacitor. The exact zeros of the transfer function are given in symbolic form. However, the peak current-mode PWM-switch model yields 5th order polynomial in its denominator, which necessitates approximate root analysis in finding the symbolic equations of its poles and quality factors. By using this analysis, the approximate poles and quality factors also derived symbolically in the paper.*

Bu çalışmada, tepe akım-modu kontrollü, izole edilmemiş Zeta dönüştürücünün küçük işaret analizi sunulmuştur. Yapılan analizde PWM anahtarlama modeli Sürekli İletim Modu’nda (SİM) değerlendirilmiştir. Kontrol işaretinden çıkış gerilimine olan transfer fonksiyonu çıkış kondansatöründeki esr (eşdeğer seri direnç) de dâhil olmak üzere sembolik formda elde edilmiştir. Transfer fonksiyonuna ait sıfırların kesin çözümleri sembolik olarak verilmiştir. Ancak, elde edilen tepe akım modu kontrollü PWM anahtarlama modelinin paydası 5. mertebeden bir polinom olduğundan, kutupların ve kalite faktörlerinin sembolik formda bulunması için yaklaşık kök analizi kullanılması gerekmektedir. Bu analiz kullanılarak yaklaşık kutuplar ve kalite faktörleri de sembolik formda türetilmiştir.

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