A design approach integrating the magnetic circuit and electric circuit models for BDFIM

A design process for brushless doubly-fed induction machine (BDFIM) is presented in this paper. The approach employs the magnetic circuit model (MCM) combining an equivalent circuit model (ECM). The MCM is first accurately constructed for the BDFIM. Through this model, the dimension of the BDFIM can be rapidly calculated. The machine saturation is taken into account in the MCM, and the machine parameters, such as flux density are calculated without time-consuming finite element analysis (FEA). A graphical user interface is developed for the MCM for better user friendliness. The flux linkage obtained in the MCM is further used to determine the magnetizing inductance, which can be passed to the ECM for calculation of machine characteristics. The developed method is validated experimentally.