BOOST AND BUCK-BOOST DERIVED HYBRID CONVERTER FOR SIMULTANEOUS DC AND AC APPLICATIONS

Abstract

This seminar report introduces new hybrid converter topologies which can supply simultaneously AC as well as DC from a single DC source. The new Hybrid Con verter is derived from the single switch controlled Boost and Buck-Boost converter by replacing the controlled switch with voltage source inverter (VSI). This new hy brid converter has the advantages like reduced number of switches as compared with conventional design having separate converter for supplying AC and DC loads, pro vide DC and AC outputs with an increased reliability, resulting from the inherent shoot through protection in the inverter stage. For controlling switches PWM con trol, based upon unipolar Sine-PWM is described. Simulink model is used to validate the operation of the converter. The proposed Converter can supply DC and AC loads at 190 V and 48 V (rms) respectively from a 48 V DC source.