Estudo e análise de um conversor CC-CC de elevado ganho baseado na topologia boost empregando indutor acoplado

Abstract

Solar energy is one of the highest projection growth renewable energy matrixes. Among its advantages, there is the fact that sunlight is abundant in much of the planet during the whole year and the equipment for its use has low maintenance costs, since they have no moving parts. Combining this context with environmental concerns in the power generation sector, the growing global energy demand and the limitation of fóssil fuel reserves, the study of solar energy should be encouraged. This work proposes a new DC-DC converter topology for use in applications in this sector. The proposed converter presents characteristics of selfclamping of the voltage in the semiconductors, high static gain and use of the energy from the dispersion of its coupled inductors. The paper consists of an open loop static analysis of the five stages of operation, the proposal of a simplified mathematical model to describe its behavior and a design methodology. The mathematical model is validated when compared to the converter simulation, becoming the basis for dynamic behaviour studies and proving the topology's validity for applications in the photovoltaic energy sector.