Using Analytical Approach with Finite Element Analysis for Coupling Magnetic and Thermal Analysis for Motors

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Thermal analysis is a key factor when designing motors. We propose to link the studies of
electromagnetic and thermal aspects in transient application with Finite Element Method (FEM) to
represent the thermal state of motor with higher accuracy. As electromagnetic response time is
different of thermal response time, an original method is used for extracting average values on one
magnetic period of losses (Joule and iron losses), and to use them as input for the transient thermal
analysis. So, the temperature in different parts of the motor is extracted, and brought back as input
for the next electromagnetic computation.

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