Monitoring and Diagnostics of Electrical Machines and Drives: a State of the Art

Due to the increasing spread of electrical machines and drives in any field and to the growing development of researches on their predictive maintenance, a novel review of the literature on the diagnostics of these devices may be useful for future references. The aim of this paper is to show an up-to-date overview of the investigated techniques, by subdividing them with respect to the components most prone to fault, with the aim to cover all the main types of machines, from the low voltage motors to the large power generators. Particular attention will be paid on the methodologies based on the electromagnetic signals.