INTERNATIONAL JOURNAL ON ELECTRONIC & ELECTRICAL ENGINEERING
ISSN 0974-2042, IJEEE
Nov. 2008 – Jan 2009
Spring Edition 2009
pp. 113-126, Volume 02, Number 2
S. Padmanabhan, Y.Sukhi & Y. Jeyashree
© Scientific Engineering Research Corporation
http://serc.org.in
IDENTIFICATION OF STEADY-STATE OPERATIONAL
MODES OF SERIES PARALLEL RESONANT DC-DC
CONVERTER BASED ON COUPLED TRANSFORMER IN
RESONANCE OPERATION
S. PADMANABHAN
HOD/ECE Department
RMK Engineering College
Kavaraipettai
Tamil Nadu -601206
gayathrisp@hexaware.com
Y.SUKHI
Research Scholar
Sathyabama University
Old Mahapalipuram Road
Tamil Nadu –600 119
sukhirmk03@yahoo.com
Y. JEYASHREE
Assistant Professor
Sathyabama University
Old Mahapalipuram Road
Tamil Nadu-600 119
jeyashree_christley@yahoo
ABSTRACT
This paper identifies all the steady state operational modes of series parallel resonant
dc-dc in resonance operation. An improved soft-switching topology of a full bridge pulse width
modulated dc-dc converter is described. The series parallel resonant converter is a preferred
topology for dc-dc power conversion. Its main attractive features are zero voltage switching
(ZVS), zero current switching (ZCS). The frequency of operation is chosen to obtain the
desired power handling capacity. The efficiency becomes maximum when the operating
frequency is close to the resonant frequency. Good efficiency can be maintained at lower
loads and to achieve this, the peak current decreases with decrease of load proportionately.
By rectifying the voltage across the parallel capacitor, a dc voltage is obtained which may be
filtered to achieve smooth dc. A variable or constant voltage can be obtained from constant or
variable load by varying the gate angle by means of control circuit.
Identification of Steady-State Operational Modes of Series Parallel Resonant Dc-Dc Converter Based on Coupled
Transformer in Resonance Operation; S. Padmanabhan, Y.Sukhi & Y. Jeyashree