Amorphous Long Stator Core Loss Calculation of Linear Motor Based on An Improved Calculation Model

The core loss of linear motor for high-speed maglev train increase the temperature rise and affect the operation performance of the motor. Therefore, it’s necessary to accurately calculate the core loss. Because of the high operation frequency of the linear motor of the high-speed maglev train, the application of Bertotti core loss separation trinomial model is limited. In this paper, an improved separation trinomial model is adapted to calculate the long stator core loss of linear motor. Firstly, the distribution of magnetic density in each part of the long stator is analyzed, and the rationality of applying the improved calculation model to linear motor is determined. Secondly, the Bertotti trinomial model and improved trinomial model are adapted to calculate the long stator core loss of linear motor. Finally, the results calculated by the two models are verified by finite element. The results show that the calculation accuracy of the improved trinomial model meets the needs of engineering.