This PhD dissertation proposes several DC/DC power electronic converters for high voltage and low to medium power applications such as solar photovoltaic systems, electron accelerators for X-ray production, battery charging and high voltage pulse generation systems. The proposed converters are designed to operate in continuous conduction mode (CCM) and have desirable features such as low switch voltage stresses, continuous input current, non-inverting output voltage, and wide input voltage range. To develop these converters, different combinations of various types of voltage multiplier circuits (VMC) are used. Based on the number of power switches there are two categories of converters proposed, single-switch and double-switch converters. Design parameters such as the size of the passive components are calculated and steady-state analysis is performed for each converter. Scaled power hardware prototypes for each converter are developed and verified for the feasibility of the converters, the validity of the theoretically calculated voltage gain and the power quality of the proposed systems. Parallel and series combinations of the converters for voltage sharing and output voltage ripple reduction are discussed in detail. The modular structure of power electronic systems is discussed briefly and a high voltage pulsed power supply is developed by using two modules of LLC resonant converter. Furthermore, an isolated modified SEPIC (single-ended primary inductor converter)-based converter for isolated or wireless energy transfer applications is introduced and discussed briefly.

This PhD dissertation proposes several DC/DC power electronic converters for high voltage and low to medium power applications such as solar photovoltaic systems, electron accelerators for X-ray production, battery charging and high voltage pulse generation systems. The proposed converters are designed to operate in continuous conduction mode (CCM) and have desirable features such as low switch voltage stresses, continuous input current, non-inverting output voltage, and wide input voltage range. To develop these converters, different combinations of various types of voltage multiplier circuits (VMC) are used. Based on the number of power switches there are two categories of converters proposed, single-switch and double-switch converters. Design parameters such as the size of the passive components are calculated and steady-state analysis is performed for each converter. Scaled power hardware prototypes for each converter are developed and verified for the feasibility of the converters, the validity of the theoretically calculated voltage gain and the power quality of the proposed systems. Parallel and series combinations of the converters for voltage sharing and output voltage ripple reduction are discussed in detail. The modular structure of power electronic systems is discussed briefly and a high voltage pulsed power supply is developed by using two modules of LLC resonant converter. Furthermore, an isolated modified SEPIC (single-ended primary inductor converter)-based converter for isolated or wireless energy transfer applications is introduced and discussed briefly.

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