Achieving high input power factor for DCM Buck PFC converter by variable Duty-Cycle control

Abstract

Buck power factor correction (PFC) converter is widely used for a broad range of AC/DC applications because of its many advantages However, the traditional discontinuous conduction mode (DCM) buck power factor correction converter (PFC) operates on constant duty-cycle control (CDCC) scheme, due to which its input power factor (PF) is low. For improving PF near to unity, a variable-duty-cycle control (VDCC) method has been proposed. Fitting duty-cycle method is also introduced to make circuit implementation easier. For verifying the validity of proposed technique, the simulation results are carried out.

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“…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.…”

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“…The eleventh paper, authored by Memon, Nizamani, Memon, Memon and Soomro (2019) discuss achieving a high input power factor for a DCM Buck Power Factor Correction (PFC) converter. Such converters are commonly employed for a broad range of AC/DC applications.…”