Análise do efeito de chaveamento em alta frequência em diferentes tecnologias de semicondutores utilizando um dsp multi-núcleos

Abstract

Wide-Bandgap (WBG) semiconductors have developed rapidly in recent years, enabling greater efficiency and power density in the design of power electronics converters for various application areas. In this scenario, this work analyzes the efficiency and specificities of Silicon Carbide (SiC) technologies and their cascode topology (SiC-Cascode), operating at high switching frequencies. The analyzes are performed using a Boost converter designed for conversion systems in the MEA - More-Electric Aircrafts context, where alternating current (AC) power systems can operate at fixed frequency (115V/400Hz), or at variable frequency (115V / 360-800Hz), and the Direct Current (DC) power system where a 400V or +/-270V DC bus is normally used. To validate the project, computer simulations were performed and a 1.0kW prototype was built in the laboratory. Performance analysis demonstrates that 98% efficiency is achieved with switching frequency in the range of 100 kHz to 500 kHz, which is most suitable for MEA.