Hybrid Simulation of Electromagnetic Field in Squirrel-Cage Winding

The complete mathematical model of the phenomena in the electromagnetic field of electrical machines should include not only the field equations but also the Kirchhoff’s equations which describe the scheme of windings connections. The methods of the formation of such a model and of the electromagnetic field simulation in the windings composed of a series of connected coils have been given in works1,2. However, in the presented paper the author describes the method of direct simulation of the electromagnetic field in a region with squirrel-cage windings. The specific hybridism of the method consists in connection of the field and Kirchhoff’s equations, and also in application of a hybrid computer system composed with a parallel matrix processor for the field simulation and a conventional digital computer. The systems with a two-dimensional magnetic field have been considered. The sectors of end rings with parts of bars which protrude from the ferromagnetic core have been treated as concentrated resistance and inductance elements.