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Analysis, Modelling and Application of Advanced Power Semiconductor Devices

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vii such disadvantages, Distributed Power Supply (DPS) systems with highly efficient characteristics have been developed and widely used due to their advantages in terms of reliability, maintainability, flexibility, and standardization. Alternative efficient power delivering systems can be realized by using local Voltage Regulator Modules (VRM), standing out for their low voltage and high current characteristics, which are largely demanded by modern motherboards for computers. When the concern for the environment and increasing energy costs call for the energy conservation, Power Electronics is highly performing in providing applications based on fluorescent lamps operating at high frequencies and efficiency, on motor-driven pump and on compression systems. In particular, adjustable-speed-driven pumps and compressors have been widely employed in process control and factory automation, due to the availability of process computers. The increasing interest addressed to electric and hybrid vehicles featuring reduced smog in large metropolitan areas has also led to the development in the field of transportation of Power Electronics applications based on battery chargers. The role of Power Electronics is aimed to satisfy the primary requirements for the battery packs of electric and hybrid vehicles, which are high power density, high energy density, low cost, long life, and high charging efficiency. Another important sector where Power Electronics plays a significant role is represented by the transmission of power over High-Voltage DC (HVDC) lines. After being converted into dc, line- frequency voltages and currents are sent through the transmission line, where at the end of which are newly converted in ac. Such sector shows a strong potentiality due to the application of photovoltaic and wind-electric systems interconnected to the utility grid. The technological advancement achieved in the field of solid-state devices has been determinant for the progress of Power Electronics. The improvement in device performances and the decline in cost have led several systems, such as residential, commercial, industrial, transportation, aerospace, telecommunications and utility systems, to use Power Electronics. Basically the power device controls the flux of electric power from the supply to the user, with an efficiency which is strictly depending on the electrical performances of the component. The efforts of device designers are addressed to overcome the limits imposed by the semiconductor technology, looking for an efficient processing of electric power. In fact, transistors feature certain limitations which depend on the technology on which are based, hence,

Anteprima della Tesi di Rosario Pagano

Anteprima della tesi: Analysis, Modelling and Application of Advanced Power Semiconductor Devices, Pagina 2

Tesi di Dottorato

Dipartimento: Dip. Ing. Elettrica Elettronica e dei Sistemi

Autore: Rosario Pagano Contatta »

Composta da 208 pagine.

 

Questa tesi ha raggiunto 1260 click dal 13/01/2005.

 

Consultata integralmente una volta.

Disponibile in PDF, la consultazione è esclusivamente in formato digitale.