Design and improvement of a soft switching high step-up boost converter with voltage multiplier

• Published in: IET power electronics 2017-12, Vol.10 (15), p.2163-2169
• Main Authors: Heidari Beni, Sadegh, Mirtalaei, Sayyed Mohammad Mehdi, Kianpour, Ardavan, Aghababaei Beni, Sara
• Format: Article
• Language: English
• Subjects: active clamp circuit; circuit efficiency improvement; coupled inductor leakage inductance; coupled inductor technique; diodes; diodes reverse recovery problem; high‐voltage gain; inductance; inductors; magnetic leakage; power 200 W; Research Article; semiconducting elements; soft switching high step‐up boost converter improvement; switching convertors; switching loss reduction; voltage 400 V; voltage 40 V; voltage multiplier; voltage multipliers; voltage stress reduction; zero current switching; zero voltage switching
• ISSN: 1755-4535; 1755-4543; 1755-4543
• DOI: 10.1049/iet-pel.2017.0162

A new soft switching high step-up boost converter is proposed in this study. Coupled inductors technique is used along with voltage multiplier in order to provide high-voltage gain and reduce voltage stress across semiconducting elements. Using an active clamp circuit, soft switching condition is provided for both the main and auxiliary switch which reduces the switching losses and improves the circuit efficiency as well as power density. The reverse recovery problem of diodes is alleviated due to the existence of the leakage inductances of the coupled inductors in series with diodes. The circuit performance is investigated and theoretical analysis is provided. A 200 W 40 V input to 400 V output laboratory prototype of the proposed converter is implemented, and the experimental results show the proper performance of the proposed converter.