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The analysis DC-DC Double Quadratic Buck Converter is presented in this paper. This converter has the advantages of high static gain compared to the conventional Buck Converter. The topological symmetry reduce the stress voltage over the switches to half of the value compared with the conventional Quadratic Buck Converter and simplifies the modeling of the converter. The analysis is made for continuous,...
The focus of this paper is to develop a framework to evaluate and analyze the reliability of the power electronic circuits in electric vehicle chargers, which are expected to be a major component of the utility load in the future. A general infrastructure of electric vehicle charging systems is described and different charging levels are discussed. To illustrate a numerical reliability analysis, two...
This paper presents a single-phase Hybrid Flying Dc-Source Active Neutral Point Clamped inverter, derived from the Hybrid Active Neutral Point Clamped/Flying Capacitor inverter. In order to validate the proposed concept, simulation studies and experimental measurements are presented. It is also shown the feasibility of application of the proposed inverter in single-phase isolated load PV systems.
A new step-up basic switching cell formed by three passive elements and two diodes is proposed. It is inserted in a boost converter in order to obtain a new hybrid PWM nonisolated converter able to provide a large dc gain, as required in electrical grids supplied by solar or fuel cells. A family of converters can be created by inserting the defined switching structure in any step-up converter. Analysis,...
Focus is on the single-ended primary-inductor converter (SEPIC) topology of the DC/DC converters widely used in power factor correction and renewable energy applications. We propose a passive modular structure of the SEPIC. The main advantage lies in totally passive parallel module use. The base module contains all active elements and a control system. Operation of the modular structure is analyzed...
Voltage conversions with high step-down ratios are required in many medium voltage applications for supplying auxiliary electronics. In this paper a new topology for high conversion ratios with low voltage stresses of components, modular structure and simple control is presented. The operation principles are described together with analytical descriptions of the average value of the inductor currents...
This paper presents a new single stage dc-dc boost converter topology with very large gain conversion ratio as a switched inductor multilevel boost converter (SIMLBC). It is a PWM-based dc-dc converter which combines the Switched-Inductor Structures and the switching capacitor function to provide a very large output voltage with different output dc levels which makes it suitable for multilevel inverter...
International standards impose several constraints concerning the electric power quality and require that the harmonic content of the line current of grid connected equipment is below assigned limits. The most commonly used structure of a grid connected power supply consists of a diode bridge rectifier, a dc-dc converter used to shape the input current to sinusoidal form and a second dc-dc converter...
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