What are the different cooling methods for EV motors?

EV motor cooling methods include: Water jacket cooling (liquid coolant flowing through housing - most common), oil spray cooling (direct cooling of windings for higher power density), oil immersion (motor submerged in oil - excellent cooling but higher drag), and air cooling (simple but limited to lower power). Selection depends on power density requirements, efficiency targets, package constraints, and cost. High-performance motors often combine methods - water jacket for housing with oil spray directly on end windings for peak power capability.