Internal short-circuit modeling and analysis based on a dynamic model for interior permanent magnet synchronous machines

Abstract

The purpose of this paper is to introduce a novel approach for modeling and studying an internal short circuit for interior permanent magnet machines. It is first necessary to develop an understanding of how the flux linkage in the machine behaves under an internal short circuit. This will enable the model of the machine to be developed into two parts. The first part corresponds to the expected model of a healthy machine, with disturbances coming from the second part. The second part involves all of the short-circuited turns fed by the currents of the machine. This form of the model opens the possibility to study the dynamics of the machine under short circuit conditions. The model also offers opportunities to develop failure detection techniques, being able to compensate the disturbances from the shorted turns in the windings.