Title :
Investigation of SEPIC converter in critical DCM
Author :
Setty, A.R. ; Wekhande, Shashank
Author_Institution :
Avant Garde Solutions Pvt Ltd., Mumbai, India
Abstract :
SEPIC converter operated in critical discontinuous conduction mode or boundary conduction mode (BCM) is investigated. In this paper, switch turn on is initiated when the output diode current falls to zero, when the output diode turns off, difference between the inductor currents flows through, switch parasitic capacitance and voltage across the switch drops, which ensures Zero voltage switching (ZVS). ZVS improved the efficiency. While turn-off switching process is established when the peak transistor current reaches the threshold level set by the controller output. This paper explains operating principles of BCM mode and design of power components. Prototype is designed and experimental results are provided.
Keywords :
DC-DC power convertors; switching convertors; zero voltage switching; BCM mode; SEPIC converter; ZVS; boundary conduction mode; controller output; critical DCM; critical discontinuous conduction mode; inductor currents; output diode current; peak transistor current; power component design; switch drops; switch parasitic capacitance; switch turn on; threshold level; turn-off switching process; zero voltage switching; Capacitors; Equations; Inductors; MOSFET; Switches; Voltage control; Zero voltage switching; BCM; Critical DCM; SEPIC Converter; ZVS;
Conference_Titel :
Power Electronics, Drives and Energy Systems (PEDES), 2012 IEEE International Conference on
Conference_Location :
Bengaluru
Print_ISBN :
978-1-4673-4506-4
DOI :
10.1109/PEDES.2012.6484428
