Abstract
Abstract: This paper presents the analysis of an induction-machine with a concept of the rotor-fed by a converter. Statorwinding configured in star and connected to the input-side of the three-phase voltage-source, whereas rotor-windings are fed by back-to-back converter by means of DC-link capacitor. For this, the Induction-machine is modelled in MATLAB/Simulink and simulated with and without a converter. The rotor circuit is magnetized with the help of back-to-back converter which in turns supply the variable-reactive power by setting the different phase-shift angle between the converters. The results depict the enhancement of Power-factor and also presents the dynamic performance of the machine includes the loading and de-loading as well as the starting condition of the machine. Fundamental-frequency variations of the converter enhance capability of machine to operate at a constant-speed with variable-load operation. Impact of variation in phase-shift angles between the converters on the power-factor, reactive-power, stator and rotor-current are also presented.
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