Numerical calculation of temperature field for tubular linear motor based on finite element method

This paper conducts the research of numerical calculation of temperature field for a tubular linear motor under different working conditions, adopting heat transfer theory. The temperature field model of the motor based on finite element method (FEM) in cylindrical coordinates is established. When the motor works in short stroke back and forth for a long time, the coupled region of the mover and stator is selected as the temperature calculation region. And the heat convection boundary of the surface between the coupled region and uncoupled stator is established, where reflects the heat exchange. When the motor works in high over-load for a short time, two temperature field models are researched and compared, choosing the mover-stator coupling area and the mover as the calculation region respectively. And moreover, the static temperature field distribution of the motor under long time working condition and the temperature rise under high over-load as well as short time condition are obtained. Finally, on the basis of computational simulation, the results of calculation and experiment are compared.