Study of linear induction motor end effects using 3-D FEM and equivalent circuit

In this paper, asymmetry nature of linear induction motors and, in particular, the impact of the end effects on the circuit parameters and the motor performance is studied. End effects are classified into two groups, namely as static and speed-dependent (dynamic) ones. Static end effect is modelled by quasi-stationary finite element analysis coupled with equivalent circuit via the lumped parameters. The analysis of the motor with the combination of static and dynamic end effects is done with time-comprehensive stepping finite element analysis. The approach makes the contribution of each type of the end effect on the performance of the motor more visible, than it is possible within approaches presented to this date. The results obtained from modeling are partially verified by the test carried out on experimental model of the motor.