Consideration of Axial Effects and Rotor Temperature in Circuit Models of Induction Machines

Abstract

The circuit model is a simple model that can be used for motor control and other applications. Here, we derive circuit model parameters that can take into account the rotor skew, bar temperature, and current distribution in the bar of an induction machine. The proposed method is characterized by the fact that the parameters can be determined only by 2D magnetic field analyses, even for axial structural changes such as skew, and can flexibly respond to design changes. The high accuracy of the model was confirmed from analysis results using the circuit model with the proposed parameters and the measurement data of a test machine.