Analysis on new equivalent circuit of linear induction motor

Based on magnetic circuit complex power method, through analyzing linear induction motor two dimensional magnetic flux density equations, this paper achieves T model equivalent circuit considering end effects, primary half filled slots, yoke magnetic saturation and back iron resistance. The method uses four coefficients to describe influence on mutual inductance and secondary resistance brought by end effects. Then according power conversion, park coordinate transformation is applied in three phase voltages, flux linkages and currents. Two phase relevant equations and equivalent circuits in synchronous axis are gained. These models unite with those of rotary inductance motor. Furthermore, four coefficients, mutual inductance and secondary resistance at starting point are analyzed. Finally, thrust under different operating conditions is investigated. The simulation results agree with experiments well, which indicate the new model is credible and useful to engineering application.