Técnica de modulação vetorial aplicada no acionamento de máquinas elétricas trifásicas com enrolamentos abertos para minimização da tensão de modo comum

Abstract

In power electronics, the study of modulation techniques and topology of converters are widely used in industrial applications for driving electrical machines. In this context, research is always looking for improvements, in general, in the quality of the system, whether increasing efficiency, performance or machine life. The topology of a conventional converter as well as the pulsewidth modulation technique is the basis for the development of the studied system. So, its characteristics and relationships were taken in consideration for the development of the model. Thereby, a study was realized on a drive system for electrical machines with open winding terminals from two conventional converters. For the driving, a modulation technique based on the vector analysis of the switching states was proposed to minimize the common-mode voltage. Besides that, a simulation was realized, considering ideal conditions to validate the described technique and the results presented the minimization of the common mode voltage based on the choice of certain switching states.