Modeling of thermal operating modes of a linear electrical machine in a strong coupled task

In this paper, the possibility of reducing the nonlinearities of the model for calculating the thermal characteristics of a linear asynchronous machine is considered. The magnetic field is adopted as slowly varying in time (harmonic field). The temperature field is calculated in the time domain taking into account the change in the thermal and electromagnetic properties of the material at each time step. In the course of the work, it has been possible to neglect a number of nonlinearities, which makes it possible to save computing resources. The influence of methods for specifying natural convection in explicit and implicit form is analyzed. A method of correct heat transfer at high speeds is proposed.