Open AccessHigh efficiency wide input extreme output (WIEO) tapped inductor buck–boost converter for high power LED lighting
Author(s) -
Pal Somnath,
Singh Bhim,
Shrivastava Ashish
Publication year - 2020
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2018.5785
Subject(s) - inductor , buck–boost converter , buck converter , total harmonic distortion , boost converter , diode , power (physics) , electronic engineering , computer science , voltage , electrical engineering , control theory (sociology) , engineering , physics , control (management) , quantum mechanics , artificial intelligence
A power factor corrected single switch tapped‐inductor buck–boost converter is proposed to achieve improved efficiency in extreme step‐up and step‐down conditions. This new and modified topology is having diode‐tapped and switch‐tapped configurations for step‐down and step‐up modes of operation, respectively. The proposed modified buck–boost converter is designed to operate in critical conduction mode (CrCM) to achieve quasi‐resonant operation. Both the buck and boost functionalities of the buck–boost converter are analysed using state space analysis with closed loop stability under varying input and output conditions. Several advantages and necessity of tapped versions are discussed and implemented under wide input and extreme output (WIEO) conditions. Two different prototypes are developed at extreme buck and boost levels to establish the benefits of the proposed arrangements. The efficiency improvement of the proposed converter is compared with the conventional buck–boost converter. The achieved efficiency of diode‐tapped buck mode and switch‐tapped boost mode is found 95% and total harmonic distortion is observed only 4% at 230 V AC mains for a prototype of 150 W, which is much improved results as compared to the previous research work on the tapped‐inductor converter.