Integrated Buck-Flyback Converter with Simple Structure and Unity Power Factor

Untitled

“…Electronic devices require AC to DC converter (rectifier) to convert AC voltage from the grid to DC voltage for the electronics and its result is low power factor (PF) and harmonic current injection into the system. Nowadays, power factor correction (PFC) converters are being widely used which can achieve high power factor (PF) and reduce the harmonics caused during AC to DC conversion (Praneeth & Williamson, 2018;Williamson, Rathore & Musavi, 2015;Nussbaumer et al, 2019;Anwar et al, 2017;Al Gabri, Fardoun & Ismail, 2015;Badawy, Sozer & De Abreu-Garcia, 2016;Memon et al, 2019aMemon et al, , 2019bMemon et al, , 2019cMemon et al, , 2019d.…”

“…For modifying the performance of traditional buck converter, various research has proposed various topologies and control schemes (Endo, Yamashita & Sugiura, 1992;Lee, Wang & Hui, 1997;Spiazzi & Buso, 2000;Huber, Gang & Jovanovic, 2011;Jang & Jovanović, 2011;Lamar et al, 2012;Ki & Lu, 2013;Al Gabri, Fardoun & Ismail, 2015;Memon et al, 2016;Memon et al, 2017;Memon et al, 2018aMemon et al, , 2018bMemon et al, 2019aMemon et al, , 2019bMemon et al, , 2019cMemon et al, , 2019d Most of the work in the literature is done to improve the PF of the buck converter. The purpose of this paper is to introduce the control scheme which can improve the efficiency of DCM buck converter.…”

“…In order to meet relevant harmonic standard and reducing input current distortion, various researchers have proposed different types of power factor correction (PFC) converters (García et al, 2003;Singh et al, 2011;Memon et al, 2016;Memon et al, 2018aMemon et al, , 2018bMemon et al, 2019aMemon et al, , 2019bMemon et al, , 2019cMemon et al, , 2019dMemon et al, 2020aMemon et al, , 2020bMemon et al, , 2020c.…”

“…The buck converter now days have attracted the attention of the many researchers (Mahdavi & Farzanehfard, 2010;Liu et al, 2014;Wu et al, 2011;Wu et al, 2012;Memon et al, 2016;Memon et al, 2018aMemon et al, , 2018bMemon et al, 2019aMemon et al, , 2019bMemon et al, , 2019cMemon et al, , 2019d The input PF of buck converter in low because of dead zone in the average input current that is present until input voltage is more than output voltage. It causes the input current to contain large harmonic disturbances.…”

Realization of Unity Power Factor for Ac/Dc Boundary Conduction Mode Flyback Converter With Any Specific Turn’s Ratio

“…So the industries have built various standards such as IEC61000-3-2 limit and IEEE 519 [Compatibility, 2014-Langella et al, 2014. Therefore, various types of power factor correction (PFC) converters are put forward in the literature to improve the shape of distorted current [García et al, 2003], [Singh et al, 2011], [Memon et al, 2017], , [Memon et al, 2019], and flyback converter is widely used topology because of numerous advantages. Its advantages include isolation between input and output circuits, minimum component count, low operating duct-cycle, and simple structure.…”