الفهرس 
CHAPTER 1: Overview of the Thesis.Only 14 pages are availabe for public view
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Abstract
The switched-mode DC-DC converters are some of the most widely used power electronics circuits for its high conversion efficiency and flexible output voltage. This converters used in electronic devices are designed to regulate the output voltage against the changes in the input voltage and load current.This leads to the requirement of more advanced control methods to meet the real demand. Many control methods are developed for the control of DC-DC converters.
This thesis presents an interleaved buck DC-DC converter using zero current switching (ZCS) resonant for battery charger applications. This converter has two MOSFETs as switches along with an interleaved inductor (ZCS). This allows the proposed interleaved buck DC-DC converter to have higher efficiency and operate with higher switching frequency. The proposed novel interleaved buck DC-DC converter has advantages simplicity, low cost, high efficiency and easy control under the (ZCS) condition accordingly reducing the switching losses. The most important advantage is that it offers a lower switching losses and a higher power density. To improve the performance of the converter coupled inductorsare used. The coupled inductors reduce the magnetic size and also improve the converter’s transient performance without increasing the steady-state current ripple. The detailed study of operating principle and design considerationsare performed. The calculated efficiency is ensured about 91.11% which is substantially considered being satisfactory performance as achieved in this thesis. Finally, the effectiveness of the proposed control scheme is demonstrated through PSIM simulations. The proposed interleaved buck DC-DC converter using (ZCS) has a straightforward structure, low cost, easy control, and high efficiency.