Heat1: Slot of an electric machine

Temperature field in the stator tooth zone of power synchronous electric machine.

Problem Type:
The plane-parallel problem of heat transfer with convection.

Geometry:

All dimensions are in millimeters. Stator outer diameter is 690 mm. Domain is a 10-degree segment of stator transverse section. Two armature bars laying in the slot release ohmic loss. Cooling is provided by convection to the axial cooling duct and both surfaces of the core.

Given:
Specific copper loss: 360000 W/m;
Heat conductivity of steel: 25 W/Km;
Heat conductivity of copper: 380 W/Km;
Heat conductivity of insulation: 0.15 W/Km;
Heat conductivity of wedge: 0.25 W/Km;

Inner stator surface:

Convection coefficient: 250 W/Km2;
Temperature of contacting air: 40C.

Outer stator surface:

Convection coefficient: 70 W/Km2;
Temperature of contacting air: 20C.

Cooling duct:

Convection coefficient: 150 W/Km2;
Temperature of contacting air: 40C.

See the Heat1.pbm problem in the Examples folder.