Abstract
The mathematical model of a deep-bar induction machine has been improved by taking into account the stator iron loss, the skin effect in the rotor winding and the saturation of the magnetic circuits along the main magnetic flux paths and leakage fluxes. The mutual inductances of the windings and leakage inductances are represented as nonlinear functions of the moduli of the corresponding currents flowing in these windings. Stator iron loss are taken into account using an additional winding located on the stator and having a common mutual inductance, resistance and nonlinear leakage inductance with other windings. The skin effect in the rotor winding is taken into account by its representation by two R, L branches connected in parallel. The simulation results of starting and loading modes for a deep-bar induction motor with 1700 kW rated power and 6 kV stator nominal voltage are presented.
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