Numerical Simulation on the Flow and Temperature Field in the High-Power Motor

Abstract

The ventilation structure affects the internal wind road and air distribution of the motor directly, and then has a great influence on motor heat dissipation. Focusing on the 5000kW 10kV high-power motor, this paper establishes a numerical analysis model which has been validated by experiment. Based on the established numerical model, the flow field and temperature field inside the motor under the conditions of variable ambient temperature and variable inlet air velocity are analyzed. The finding demonstrates that the maximum temperature and average temperature of the stator and rotor of the motor increase with the increase of the ambient temperature, and the increase rate of change is basically unchanged, and that decrease with the increase of the inlet air velocity. When the inlet air velocity increase to a certain value, the maximum temperature and average temperature of the motor stator and rotor decrease relatively slowly. This thesis analyses the motor ventilation cooling system and temperature distribution, and provides a theoretical basis for the optimization of motor ventilation structure.

Keywords

• High power motor
• ventilating structure
• temperature distribution
• CFD