Simple lumped parameter thermal model with practical experimental fitting method for synchronous reluctance machine

With the ever increasing pressures in automotive industries to develop smaller and more efficient electrical motors for their applications, it becomes necessary to have a thermal model at the design stage. This study proposes a fast, precise and practical thermal model construction that requires minimal development time for a synchronous reluctance machine which is to be used in automotive applications. It uses a method we call “practical experimental fitting method” which corrects a basic and simple thermal model by adding corrector coefficients into the model in order to fit it to experimental results obtained from the first machine prototype.