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CONTROLE DE INVERSORES DE TENSÃO TRIFÁSICOS BASEADOS NO CONTROLE DE FLUXO E EM TABELAS DE CHAVEAMENTO SIMPLES REGiÕES DE CHAVEAMENTO VARIÁVEIS

ABSTRACT RESUMO: Um método para controle de inversores de tensão trifásicos é apresentado. A partir de certos métodos de controle de fluxo, baseados em tabelas de chaveamento simples, generaliza-se o conceito de REGIÕES DE CRAVEAMENTa VARIÁVEIS, que permite maior controle sobre as componentes de tensão de eixo direto e em quadratura, em Coordenadas de Campo. a método aproveita informações já disponíveis nos métodos tradicionais e sua implementação a partir destes é bastante simples. Resultados de simulação do controle do fluxo de estator de um motor de indução são apresentados e mostrando a possibilidade de redução da frequência de chaveamento do inversor em regime permanente. ABSTRACT : A method for controlling voltage fed three­ phase inverters is presented. It starts from some methods of flux controI, based on simple switching tables, and generalizes the concept of VARIABLE SWITCHING REGIaNS, which allows greater control over the direct and in quadrature components of the voltage vector, in Field Coordinates. anly information already available in the other methods are required, and its implementation from them is very easy. Simulation results for the stator flux control of an induction motor are presented, showing the possibility of inverter switching frequency reduction.

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