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Resumen Este articulo presenta la deduccion matematica de las perdidas de potencia por conduccion en inversores monofasicos de puente H controlados mediante Modulacion Senoidal de Ancho de Pulso (SPWM). Se presenta el desarrollo matematico de las ecuaciones de voltaje y corriente a traves de los semiconductores durante su estado de conduccion y se calcula su disipacion de potencia. Las ecuaciones de perdidas de potencia encontradas dependen de las caracteristicas de la modulacion empleada y de los parametros de la carga. Mediante validacion experimental y de simulaciones se obtuvieron curvas que muestran la validez de las ecuaciones y sus aproximaciones. Palabras clave: perdidas de potencia por conduccion, semiconductores, modulacion SPWM, inversor de potencia Deduction of Power Losses by Conduction in Sinusoidal Pulse Width Modulation Inverters, SPWM Abstract This paper presents the mathematical derivation of the power losses by conduction in single phase H-bridge inverters controlled by Sinusoidal Pulse Width Modulation (SPWM). The development of the mathematical equations for voltage and current through the semiconductor in its conducting state is presented and the power dissipation is calculated. The power loss equations found depend on the characteristics of the modulation used and on the parameters of the load. Through simulations and experimental validation, curves showing the validity of the equations and their approaches in accordance with the conditions of the test were obtained.

Deducción de Pérdidas de Potencia por Conducción en Inversores Modulación Senoidal de Ancho de Pulso, SPWM