Thermal Design and Analysis

Thermal analysis utilizes finite difference and finite element techniques, both uniquely developed by Calnetix for electric machinery applications and commercially validated software.

The finite difference thermal model of a typical machine takes into account all motor thermal interface boundaries. Equations are solved using a modified Gauss-Seidel solution for steady-state heat transfer calculations.

In addition to conduction heat transfer, the analysis also considers heat transfer by radiation and forced convection at each surface, including convection heat transfer between concentric rotating cylinders in the gap and fluid cooling through stator/rotor gap. The frictional windage losses are also considered when applicable. The electrical copper losses (I2R) are accounted for as a function of the winding temperature.