What is it about?
This paper proposes a single-stage ZVT PWM flyback power factor correction converter. The bulk capacitor voltage is controlled by using negative magnetic feedback without any input current dead angle. In the proposed circuit, the main and auxiliary switches turn on and off under ZVS and ZCS condition, respectively. The proposed auxiliary circuit provides soft switching condition while eliminating the dead angle caused by negative magnetic feedback winding. Thus, high efficiency and high power factor is achieved. Experimental results obtained from a 160V/300W circuit are provided to verify that the proposed structure can suppress the dead angle at zero crossing and soft switching of all switches can be achieved properly.
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Why is it important?
The pulsed current drawn from the line voltage which caused by the diode rectifier, increases the input current harmonics and decreases the power sources efficiency. Many power factor correction (PFC) converters have been used to satisfy IEC1000-3-2 harmonic regulation, in recent years
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Mohammad Mehdi Tavassol was born in Isfahan, Iran, in 1975. He received the B.S. and M.S. degrees in electrical engineering from the Isfahan University of Technology (IUT), Isfahan, in 1997 and 2000, respectively. He is currently working toward the Ph.D. degree in electrical engineering at the Isfahan University of Technology (IUT), Isfahan. His research interests are soft-switching techniques in dc-dc converters and power-factor-correction converters.
mehdi tavasol
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This page is a summary of: Single Stage Soft Switched PWM Flyback PFC with Reduced Dead Angle , IET Power Electronics, May 2017, the Institution of Engineering and Technology (the IET),
DOI: 10.1049/iet-pel.2016.0182.
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