Design and experimental implementation of DC-DC converter based self-tuning fuzzy PI controller

Year 2023, Volume: 38 Issue: 1, 483 - 496, 21.06.2022

Ahmet Kaysal Selim Köroğlu Yüksel Oğuz Kübra Kaysal

https://doi.org/10.17341/gazimmfd.739775

Cited By: 2

Abstract

In this study, self-tuning fuzzy PI (SFPI) controller based DC-DC boost converter topology is presented. The closed loop transfer function of the converter was obtained and its design was performed by examining the small signal model for stability analysis. The input-output relationship has been verified by black box modeling. The behaviors of the system between 20 kHz and 100 kHz at different switching frequencies were examined. Conventional PI controller was applied to test the dynamic response of the system and it was observed that voltage regulation was insufficient in cases such as input voltage and load changes in the system. Therefore, SFPI controller is proposed to improve the output voltage regulation of the converter. With the proposed SFPI the PI controllers were compared with performance criteria such as rise time, settlement time and overshoot. According to the results of the analysis, it was observed that the system efficiency was improved by reducing the losses in power conversion by designing the proposed controller and snubber circuits. The nominal voltage of the prototype converter is 48 V, the power is 100 W, and the overall efficiency of the system is 92.9%. The analysis and simulation results of the system were confirmed by experimental results.

Keywords

Fuzzy controller, DC-DC power converters, pulse width modulation, duty cycle

Kendinden ayarlı bulanık PI denetleyici tabanlı DA-DA dönüştürücü tasarımı ve deneysel uygulaması

Abstract

Bu çalışmada kendinden ayarlı bulanık PI (SFPI) kontrolör tabanlı DA-DA yükselten dönüştürücü topolojisi sunulmuştur. Dönüştürücünün kapalı çevrim transfer fonksiyonu elde edilmiş ve kararlılık analizi için küçük işaret modeli incelenerek tasarımı gerçekleştirilmiştir. Giriş-çıkış ilişkisi kara kutu modelleme ile doğrulanmıştır. Sistemin farklı anahtarlama frekanslarında 20 kHz ile 100 kHz aralığındaki davranışları incelenmiştir. Sistemin dinamik tepkisini test etmek için geleneksel PI kontrolör uygulanmış ve sistemde giriş gerilimi ve yük değişimleri gibi durumlarda gerilim regülasyonunun yetersiz olduğu gözlenmiştir. Bu nedenle dönüştürücünün çıkış gerilim regülasyonunu iyileştirmek için SFPI kontrolör önerilmiştir. Önerilen SFPI ile PI kontrolörler yükselme zamanı, yerleşme zamanı ve aşma gibi performans kriterleri ile karşılaştırılmıştır. Analiz sonuçlarına göre önerilen kontrolör ve sönümleme devrelerinin tasarlanması ile güç dönüşümündeki kayıpların azaltılarak sistem veriminin iyileştirildiği gözlenmiştir. Prototipi gerçekleştirilen dönüştürücünün nominal gerilimi 48 V, gücü 100 W olup sistemin genel verimi %92,9 olarak bulunmuştur. Sistemin analiz ve benzetim sonuçları deneysel sonuçlarla doğrulanmıştır.

Keywords

Bulanık kontrolör, DA-DA güç dönüştürücüsü, darbe genişlik modülasyonu, görev oranı

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