Design of the Forced Water Cooling System for a Claw Pole Transverse Flux Permanent Magnet Synchronous Motor

This paper presents a detailed finite element analysisbased design procedure of the forced water cooling system for a low voltage claw pole transverse flux permanent magnet motor (TFPM), which is used in marine propulsion systems. Iron and copper losses density distributions are obtained usingcommercial finite element method software JMAG 10.5. Surface water cooling system, with spiral cooling ducts passing throughthe aluminum hosing of the stator, is chosen as the propercooling system. To prevent any thermal and electrical unbalanced situation, for each phase separate water input andoutput are considered. Dimensions of the cooling ducts, as well as the velocity of water flowing through these ducts arecalculated in a way that makes the water flow completely turbulent, having the right speed for cooling purposes. Number of required cooling ducts for an acceptable temperature distribution, below the thermal limits of motor, is determined by finite element thermal analysis. To consider the worst case scenario, a number of assumptions are made in the thermal analysis of the motor.

Keywords:

Finite Element Analysis , Losses Distribution , Thermal Analysis , Transverse Flux Permanent Magnet Motor , Water Cooling System