Preliminary design includes compliance determination with technical specifications of main dimensions of the electrical machine Da, Di, L, stator and rotor slots design and dimensions z1 and z2, their ratio z1 / z2, as well as main air gap size. Preliminary machine winding data are calculated and winding scheme is determined and designed.
Characteristics and parameters of the main electrical materials - electrical steel, its grade and thickness, stator and rotor winding materials, and squirrel cage material in case of an induction machine are also determined.
To perform simulation, the technology that will be used to produce the electric machine is preselected at this stage. It is important for building adequate computer models at the following stage of simulation the machine being developed.