Conversion efficiency assessment for novel HSUDC with dual semiconductor switches for interleaved operation

• Published in: Electronics letters 2017-07, Vol.53 (15), p.1060-1062
• Main Authors: Shen, C.-L, Shen, Y.-S
• Format: Article
• Language: English
• Subjects: capacitors; conversion efficiency assessment; coupled inductors; DC‐DC power convertors; diodes; distrusted energy resources; dual semiconductor switches; grid‐connection applications; high‐step‐up DC‐DC converter; HSUC; power density; Power electronics, energy conversion and sustainability; power loss magnitude; power semiconductor switches; power switches; power‐loss calculation expression; switching convertors; systematic estimation
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2017.1657

A novel high-step-up DC/DC converter (HSUDC) is proposed and then the expression of power-loss calculation to estimate the efficiency of the converter is derived. The HSUDC can work at interleaved manner and mainly includes two power switches, four diodes, two coupled inductors and three capacitors. It can step up a low voltage to a much higher level for further grid-connection applications, which are therefore suitable to process the power generated by distrusted energy resources. Magnitude of power loss dominates the power density of a converter. Therefore, a theoretical and systematic estimation for HSUDC is developed, advancing the compact design towards converter building. Estimated results are compared with the practical measurements from a prototype to verify the correctness of the estimation.