In view of the complex structural characteristics of brushless AC exciter, Maxwell 16.0 was used as a development platform and Visual Basic for Applications (VBA) program development language was used to model, add materials, stimulate, split and postprocess the motor, performing secondary development. Parametric modeling of stator windings, magnetic poles, rotor slots, and armature windings in the modeling of brushless AC exciter was realized, with the functions of onekey solving, autosegmentation, and postprocessing automatic plotting. Based on Excel’s development platform, one could further design a visual interface, strengthen humancomputer interaction, reduce repetitive steps, improve the efficiency of designers, and shorten the design cycle of the motor.