Performance Analysis of Linear Induction Motor Based on Field-Circuit Coupling

Aiming at the difficulty of electromagnetic performance analysis of linear induction motor(LIM) for rail in actual running, a three-dimensiona1(3D) finite element electromagnetic simulation model of 12 kW linear induction motor is established. Combined with the experimental results of the prototype, the differences between the 3D finite element model and the twodimensional (2D) finite element model in performance analysis are compared and analyzed. In addition, the field-circuit coupling model of the LIM vector control system considering the transverse and longitudinal end effects is established by using multiple simulation platforms, and the motor uses the 3D finite element model. The running performance and loss curve of the motor under the vector control system are analyzed. The simulation and experimental results show that, the simulation results of the 3D model are closer to the experimental results, which reduces the error to a large extent. Under the control system, the motor runs stably, and all kinds of electromagnetic performance meet the design requirements. The analysis method of multi-platform cosimulation to solve the motor performance provides a reliable means for the design of the motor body and running adjustment under the control system.