Optimal design of high frequency induction motors with the aid of finite elements

The motors for high‐speed operation fed by frequency converters produce, first, a high amount of hysteresis and eddy losses in both stator and rotor iron, and secondly a temperature increase of the rotor due to current distribution in its rotor slots. Conventional calculation using analytical tools could not calculate precisely the required parameters in order to obtain an optimal model to build a prototype that its properties confirm that calculated values with the model. With a finite element method application for magnetic field and heat transfer, the required elements to design a new prototype could be elaborated very precisely and it is also a tool to prove the already existing motors for high speed applications. This allows us also to design energy efficient electrical drives according to the recommendations of the last EEMODS conference held in London in the year 1999 with the support of the European committee for energy saving.