Open AccessSingle‐stage soft‐switched PWM flyback power factor correction with reduced dead angle
Author(s) -
Tavassol Mohammad Mehdi,
Farzanehfard Hosein,
Adib Ehsan
Publication year - 2017
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.2016.0182
Subject(s) - pulse width modulation , voltage , capacitor , power (physics) , power factor , control theory (sociology) , dead time , modulation (music) , zero crossing , materials science , computer science , physics , electrical engineering , engineering , acoustics , control (management) , quantum mechanics , artificial intelligence
This study proposes a single‐stage zero‐voltage transition pulse width modulation (PWM) flybackpower factor correction converter. The bulk capacitor voltage is controlled byusing negative magnetic feedback (NMF) without any input current dead angle. Inthe proposed circuit, the main and auxiliary switches turn on and off underzero‐voltage switching and zero‐current switching conditions, respectively. Theproposed auxiliary circuit provides soft switching condition while eliminatingthe dead angle caused by NMF winding. Thus, high‐efficiency and high‐powerfactor is achieved. Experimental results obtained from a 160 V/300 W circuit areprovided to verify that the proposed structure can suppress the dead angle atzero crossing and soft switching of all switches can be achieved properly.