THE INFLUENCE OF ROTOR CAGE WINDING ON THE PERFORMANCE OF A TRANSFER FIELD MACHINE
This work presents the influence of rotor Caged winding on the performance of a Transfer Field (TF) machine. The transfer field (TF) machine comprises two identical machines that are integrally wound and mechanically coupled together but with their pole axes 90 electrical degrees out of phase. This project investigates the influence of rotor caged winding on the performance of a transfer field machine using the analysis of the caged and cage-less rotor winding configurations. From the analyses, a modeled direct and quadrature axes equations for both rotor configurations are presented for dynamic simulation. Basic parameters and machine performance such as rotor speed against time, electromagnetic torque against time, main winding current against time, and auxiliary winding current against time on load conditions were observed. The simulations were carried out using Embedded MATLAB function. It is observed from the results that when the load torque was applied to the cage and cage- less rotor winding of the TF machine, it settled at 5Nm and 4Nm respectively after a little transient during build up. It was equally observed that the main winding current for both cage and cage- less rotor on load application at 7secs were 6A and 4A respectively. The results obtained show that cage rotor winding of a Transfer field machine has a better performance characteristics than the cage- less rotor winding more especially on load.
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