A Multi-Sliced Finite Element Model for Induction Machines Incorporating Inter-bar Current

The paper initially reviews some previous work with respect to the effect of inter-bar currents on the performance of a cage induction machine with a skewed rotor. A multi-sliced nonlinear 2D finite element model is then put forward to account for this current. This model uses different circuits to assess how the inter-bar current should be incorporated into the simulation. It uses different arrangements in both the axial and radial representations. The starting characteristics are focused upon and simulation results are compared to measured results and it is verified that the inter-bar currents do have an effect that is not normally accounted for in standard modeling techniques