Abstract
A virtual instrumentation system for stator turn-to-turn winding-fault detection is presented in this paper. The system can be adopted for industry and academy as a useful tool to prevent unexpected downtime or severe damage to induction motors. The high-frequency carrier-signal injection technique is used to obtain information on machine stator winding. Measurements of the resulting negative-sequence current are used to detect turn-to-turn faults. Since the stator windings are fixed in space, a turn-to-turn fault gives rise to a stationary saliency which appears as a DC component in the spectrum of the negative-sequence carrier-signal current. The proposed virtual instrument shows the relationship of the magnitude of the DC component to the grade of failure of the stator winding.
Keywords
Get full access to this article
View all access options for this article.