Open AccessEfficiency analysis of a sliding‐mode controlled quadratic boost converter
Author(s) -
LópezSantos Oswaldo,
MartínezSalamero Luis,
García Germain,
ValderramaBlavi Hugo,
Mercuri Daniel O.
Publication year - 2013
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.2012.0417
Subject(s) - duty cycle , control theory (sociology) , boost converter , quadratic equation , voltage , mathematics , physics , computer science , engineering , electrical engineering , control (management) , geometry , artificial intelligence
A quadratic boost converter with high DC gain to step up the voltage of a standard photovoltaic panel up to 400 V is analysed. First of all, a comparative analysis among boost, quadratic boost and cubic boost reveals that the quadratic boost exhibits the best trade‐off between duty ratio range and converter efficiency. A hysteretic comparator is employed as a modulator to ensure the converter operation with high values of the duty ratio without risk of modulation saturation. A two‐loop sliding‐mode control is used to regulate the output voltage. An internal loop controls cycle by cycle the input current whose reference is established by an outer loop that processes the output voltage error by means of a proportional‐integral compensating network. The measured results in a 100 W prototype operating in continuous conduction mode of average values, ripples, frequency and efficiency for different equilibrium points are in good agreement with the theoretical predictions.