Enhancing the Cooling System Design of High-Power Density Permanent Magnet Motor for EV

Excessive losses inside permanent magnet (PM) motors in electric vehicle (EV) engine compartments can cause rapid temperature rises, deterioration of magnetic properties, limited output torques, and overheating. To ensure smooth operational condition, it's crucial to investigate and develop cost-effective cooling solutions for PM motors. This study presents a 3D fluidic-thermal linked model of a high-power density internal PM motor, based on Computational Fluid Dynamics and heat transfer theory. The fluid flow and heat dispensation are evaluated using the finite volume technique (FVM) and confirmed by practical results. Modifying the external fluid frame structure of the motor based on its heating properties improves cooling efficiency. The Taguchi approach improves cooling parameters to minimize the motor's temperature rise. This finding has significant implications for designing and developing high-power density Permanent motor for EV uses.