Optimal Design and Analysis of High-Frequency Isolation Transformer for Switched-Mode Power Converters

Year 2024, , 585 - 598, 03.10.2024

Abdurrahman Yavuzdeğer , Burak Esenboğa , Tuğçe Demirdelen

https://doi.org/10.21605/cukurovaumfd.1559912

Abstract

High-frequency (HF) transformers have gained great interest in recent years due to the advent of powerful soft magnetic materials with low core loss in semiconductor power switches. Also, the optimal design of the HF transformer is a significant issue for high-performance energy conversion systems. In this paper, a 40W 50/12.5/25 V universal input and two output discontinuous-conduction mode (DCM) flyback transformer is designed by using mathematical calculations and analyzed via 3D ANSYS/Maxwell simulation including electromagnetic and loss analysis. It is shown that the simulation results accounting for hysteresis losses, eddy current losses, copper losses, and magnetic flux density determine the accuracy of the mathematical model calculation. Analyzes are performed at 100 kHz frequency levels. Results obtained will include core magnetic flux density, core/copper losses, leakage/magnetizing inductances, windings parasitic capacitances, input/output voltage, current values, and all design parameters. Finally, the proposed HF transformer's overall efficiency is calculated and presented. Significantly, the HF transformer achieves 97.8% efficiency thanks to the transformer's core and coil selection, B-H and B-P characteristics, one-to-one dimension design, and mesh operation. The dynamic and mathematical results of the designed transformer demonstrate the design and efficiency success

Keywords

High-frequency transformer, Modeling, Electromagnetic, ANSYS/Maxwell, Loss analysis, Flayback

Anahtarlamalı Güç Dönüştürücüleri için Yüksek Frekanslı İzolasyon Transformatörünün Optimum Tasarımı ve Analizi

Abstract

Yüksek frekanslı (YF) transformatörler yarı iletken güç anahtarlarında düşük çekirdek kaybına sahip güçlü yumuşak manyetik malzemelerin ortaya çıkması nedeniyle son yıllarda büyük ilgi görmektedir. Ayrıca YF transformatörünün optimal tasarımı, yüksek performanslı enerji dönüşüm sistemleri için önemli bir konudur. Bu makalede, 40W 50/12.5/25 V tek girişli ve iki çıkışlı süreksiz iletim modlu (SİM) bir geri dönüş transformatörü matematiksel hesaplamalar kullanılarak tasarlanmış ve elektromanyetik ve kayıp analizini içeren 3B ANSYS/Maxwell simülasyonu ile analiz edilmiştir. Histerezis kayıplarını, girdap akımlarını, bakır kayıplarını ve manyetik akı yoğunluğunu hesaba katan simülasyon sonuçlarının matematiksel model hesaplamasının doğruluğunu belirlediği göstermektedir. Analizler 100 kHz frekans seviyelerinde gerçekleştirilir. Elde edilen sonuçlar çekirdek manyetik akı yoğunluğunu, çekirdek/bakır kayıplarını, sızıntı/mıknatıslama endüktanslarını, sargıların parazit kapasitanslarını, giriş/çıkış voltajını, akım değerlerini ve tüm tasarım parametrelerini içerecektir. Son olarak önerilen YF transformatörünün genel verimliliği hesaplanmış ve sunulmuştur. YF transformatörünün, transformatörün çekirdek ve bobin seçimi, B-H ve B-P özellikleri, birebir boyut tasarımı ve ağ çalışması sayesinde %97,8 verim elde etmesi dikkate değerdir. Tasarlanan transformatörün dinamik ve matematiksel sonuçları, tasarım ve verimlilik başarısını ortaya koymaktadır.

Keywords

Yüksek frekans transformatör, Modelleme, Elektromanyetik, ANSYS/Maxwell, Kayıp analizi, Geri dönüşlü

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