Electric motor with housing accommodating stator surrounding rotor - has cooling ducts running axially so gaseous cooling medium under high pressure is fed in closed cooling circuit

摘要

Several axial cooling ducts (11,31;14,32) are distributed over the circumference in the stator (10) and/or in the rotor (13). Radial cooling ducts (12,15) are provided in the stator and/or in the rotor. The axial and/or radial cooling ducts are provided in the stator laminated cure (10) and/or in the rotor laminated core (13) and/or between the short circuiting rings and packet and/or in the end turns (27). USE/ADVANTAGE - Electric motor used under water, e.g. driving submersible pump. Simple and robust construction and motor is suitable for use as dry underwater motor.