Modelagem e acionamento de uma máquina de indução eneafásica com injeção harmônica para ganho de conjugado eletromagnético

Abstract

The harmonic injection technique can provide an electromechanical system with a conjugate gain in a machine with a larger number of phases in its stator. Thus, threephase machines of larger dimensions can be replaced to meet the need for high conjugates. This work can contribute significantly in systems in which a greater efficiency is necessary, being possible to obtain a system with greater conjugated occupying a smaller area. This work proposes a mathematical modeling and activation of an asymmetric nine - phase induction machine, in order to verify the increase of electromagnetic conjugate with harmonic injection. The mathematical model was developed in a complete way, presenting the equation for all the harmonic components. Subsequently the conjugate gain was verified through computational simulation and experimental procedure. Tests were carried out with different configurations of the eneaphasic machine, at the reference voltage and at the stator connections, each situation being evaluated individually. Under these conditions, it was evaluated in which situation the e-phase machine presented a better performance.