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espanolCon el fin de reducir tamano y peso, se han venido implementando alternativas para escalar niveles de tension de la red electrica, manteniendo alta eficiencia y baja distorsion. El proposito de este articulo es presentar los resultados del diseno y construccion de un transformador electronico controlado por un microcontrolador (μC). Se realizo la caracterizacion de un transformador resonante con nucleo de ferrita, y simulaciones con los modelos reales de los dispositivos electronicos para validar la etapa de diseno. Se construyo un prototipo que conmuta a diferentes frecuencias con tiempo muerto de 2µs, obteniendo como resultado, una senal a la salida de 12Vrms que opera para cargas resistivas que consuman de 0 a 50W con una eficiencia ( ) aproximada de 94%. Los resultados muestran la viabilidad de desarrollar transformadores electronicos programables que permiten, a diferencia de los transformadores electronicos resonantes, entregar cualquier valor de potencia sin depender de la carga. EnglishIn order to reduce size and weight, alternatives have been implemented to scale voltage levels of the electrical network, maintaining high efficiency and low distortion. The purpose of this article is to present the results of the design and construction of an electronic transformer controlled by a microcontroller (μC). The characterization of a resonant transformer with a ferrite core was carried out, and simulations were developed with the real models of the electronic elements to validate the design stage. The prototype that switches to different frequencies with dead time of 2μs was built, obtaining as a result, an output signal of 12Vrms that operates for resistive loads that consume from 0 to 50W with an efficiency ()approximately 94%. The results show the viability of developing programmable electronic transformers, which unlike resonant electronic transformers, allow to work at any power value designed without depending on a load.

Diseño y construcción de un transformador electrónico 12Vrms 50W con control de frecuencia de conmutación programable