A novel thermal network for the maximum temperature-rise of hollow cylinder

This paper proposes a novel thermal network to calculate the maximum temperature-rise of hollow cylinder geometry, which is named as the maximum thermal network. Linear transformation and local linear fitting are applied to make the maximum temperature-rise of hollow cylinder represent by the maximum thermal network. One compensation unit is added into the maximum thermal network for the elimination of the error introduced by linear fitting. Moreover, an iterative algorithm is presented in this paper, which is used in the calculation of the maximum temperature-rise for the system composed of more than one hollow cylinder. At the end of the paper, the thermal model of an electric motor is built by the maximum thermal network whose accuracy is verified by comparing with finite-element analysis.

► A novel thermal network for maximum temperature-rise of hollow cylinder geometry is proposed. ► This novel thermal network has a good interchangeability with the traditional thermal network. ► This novel thermal network is simple and timesaving and its accuracy is close to the finite-element analysis.