Coupling Magnetic Field Analysis of Teeth Slot and Longitudinal End Effects for Long Primary Double-Sided Linear Induction Motor

Teeth slot effect (TSE) and longitudinal end effect (LEE) are the key factors affecting the characteristics of linear induction motors. This paper takes the long primary double-sided linear induction motor as an example. The TSE and LEE are considered on the coupling effect of the motor characteristics. Firstly, the main coupling relationship between TSE and LEE is analyzed. Second, a method is proposed to analyze the coupled magnetic field under the two effects. Then, the analytical expressions of the air-gap magnetic field, the secondary eddy current density and the electromagnetic thrust under the coupling influence are derived. Finally, the corresponding ANSYS simulation models are established to verify the accuracy of the proposed method.