Assistant Lecturer Sabah Sada Al-Gharawi, a faculty member in the Electrical Engineering Department at the College of Engineering, University of Basrah, published a research paper in the journal Energy Reports, published by Elsevier. This journal is peer-reviewed and indexed in the Clarivate and Scopus databases, and is ranked in the first quartile (Q1) of the scientific journal rankings. A new quadratic boost converter featuring an integrated coupled inductor
and low input-current ripple for renewable energy sources

This paper presents an ultra–high step-up quadratic DC–DC converter that achieves a high voltage gain while
maintaining relatively low voltage stress on semiconductor devices and a common ground between the input and
output, which is attractive for practical high-voltage, low-power-stage applications. The proposed topology uses
a low part count and shapes the source current with a low input-current ripple, easing EMI filtering. By properly
routing the magnetizing energy, the converter inherently absorbs the leakage inductance energy and eliminates
switch voltage spikes and no dissipative clamp is required. The diodes commutate with zero-current switching
(ZCS) at turn-off, thereby mitigating reverse-recovery losses and contributing to improved efficiency. A complete
steady-state analysis in CCM/DCM is provided, including a closed-form high-gain expression. A 200 W laboratory
prototype was built to validate the analysis; measurements confirm the predicted high gain, low stresses, and low
input ripple, and demonstrate a 92% efficiency at full load