Effects of the Length of Rotor Wafters on Rotor Temperature Rise for Permanent Magnet Synchronous Motor

摘要

The rotor heat load of permanent magnet synchronous motor (PMSM) occupies a large proportion of the total heat load. The length of rotor wafters has a great influence on rotor temperature rise. In order to research its influence, based on heat transfer theory and hydrodynamics, the thermal calculation model and three-dimensional flow model of PMSM are established. Then, the main heat source of the motor is measured and the heat dissipation coefficients of each part of the motor are calculated, ANSYS WORKBENCH software is used to analyze and compare the temperature rise of the rotor under different length of rotor wafters. The influence of rotor wafters on rotor temperature rise for permanent magnet synchronous motor is summarized, it provides a theory evidence for further studies on temperature rise of permanent magnet synchronous motor.