A general overview of our activities on simulation and design is presented here.
We have developed a set of modelling tools for asynchronous motors based on FEA. We are using either a time-domain approach or a frequency domain approach. We are capable of handling all the conventional stator and rotor slots.
This approach is used for defining the correct amount of skewing of rotor slots. If skewing is omitted, this leads to a drop of torque at high slip values. The skewing effect in rotors is taken into account with a multislice model.
Frequency domain approach
This approach includes nonlinearity of magnetic properties of the stator core and the rotor core and allows a quick and yet accurate estimation of performance characteristics of an induction motor. This is a perfect tool for conducting a quick sweep over predefined sets of parameters of induction machines.