A General MMF and Winding Factor Calculation Model for Electrical Machines

Calculation of MMF and winding factor of electric machines is a tedious task. Additionally, there is not a common unified method to calculate the winding factors of different types of electric machines. This is due to the lack of a universal formula for the calculation of the winding factors of both Fractional Slot Concentrated Windings (FSCWs) and Distributed Windings. It is even harder to build a generalized model in case of non-uniformities such as unequally pitched slots and different numbers of turns. However, it is possible to make such a model by using generalized winding models and complex Fourier Expansion. In this paper, a universal MMF, Fourier Coefficients, and Winding Factor calculation model is developed. The developed model is implemented to the practical stage and a calculator tool is developed in the Python environment. With this tool, it is possible to calculate and visualize the MMF, Fourier Coefficients, and Winding Factors for any winding function.