الفهرس 
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Abstract
This Thesis presents a proposed design of non-isolated high voltage gain DC-DC
converter operating with a reasonable duty cycle, by integrating a dual boost converter with a switched inductor structure, as a solution to the high-conversion ratio requirement. The proposed converter operates in discontinuous current mode (DCM) with zero current switching (ZCS) for all switches and diodes. A wide operating range of the duty cycle, high voltage gain, low switching stress, small switching losses, and high efficiency are achieved efficiently. Operating the converter in DCM can support a wide range of duty cycle operation, maintain lower voltage stress of devices, ensure an equal current sharing among boost inductors, make it easy to control, provide more stability, and require a smaller inductor which reduces size and weight of the proposed converter. The converter operates with continuous input current. These features make the converter a good choice for many applications such as photovoltaic (PV), x-ray, fuel cells, etc. To prove the converter effectiveness, theoretical analysis, project specifications, and operation principles in DCM are presented and studied. Simulation of the proposed topology is carried out in MATLAB/SIMULINK. Furthermore, a hardware prototype is
implemented in a laboratory to verify the analysis of the converter in DCM. Simulation and experimental results in open and closed loop are also introduced to confirm the validity of the analysis and design considerations. The proposed converter has been also compared with other related recently proposed converters on various performance parameters.