Thermal Management for Brushless DC (BLDC) Motor 120KW

Thermal management in BLDC motors is highly important, because the heat in the motor, especially in the rotor and stator if it is not channeled properly, it causes bad effects for the motor, such as magnetic demagnetization, insulation degradation and decreased motor performance. Therefore, it is important to regulate the heat flow in the stator and rotor, so that the motor can operate optimally. In this study, several variables will be modeled starting from power losses in the stator and rotor, thermal resulting from stator and rotor losses, and cooling system design.. This paper discusses thermal management through simulation of losses, thermal, and cooling systems on a motor BLDC 120KW. Simulations are carried out with software for motors based on Finite Element Method (FEM) on motor BLDC 120KW. The simulation on the motor produces a total losses of 4.649W with maximum current and voltage input. The goal given the maximum input is to find out the maximum losses generated by the motor in 30 rotation steps. The maximum heat generated from this motor reaches 932°C. After applying a specially designed cooling, by combining liquid and wind fluids, the maximum motor temperature is 77°C with a water speed setting in the motor cover of 18.56 m/s.