In a simple way, we define power electronics as a science dedicated to the study and development of static electricity converters, such as frequency inverters, rectifiers and DC-DC converters, aiming at maximum efficiency and quality in the transformation processes of electric energy, reducing the number of losses and interferences in energy conversion processes, as well as technologies linked to clean energy sources such as photovoltaic and wind power. The emergence of power electronics and drives provided an alternative that brought advantages for power processing, thanks to the little need for maintenance of the semiconductor switches and along with low power loss in switching. Power electronics came in around and for a few decades, there was little evolution, because the technology of switching devices available at the time was expensive, very bulky and unreliable. With the invention of the thyristor, began the great technological growth of Power Electronics. During this