A method to calculate the performance of linear induction motors using simple two-phase model

A new two-phase mathematical model of Linear Induction Motor (LIM) is discussed. This model is simpler than conventional model, but can correctly calculate both asymmetric primary current and thrust ripple performances. In addition, an improved DC testing method is proposed to determine all circuit parameters in the model. This test is completed by only one simple standstill test. Hence, both no-load steady-state operation and lock tests which are difficult to carry out on built-in LIMs are unnecessary. The proposed calculation method is implemented on a 3-phase, 4-pole and 12-slot single-sided LIM, and is validated by experimental and simulation results.