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The target of this work is to design and test an on-board diagnostic device able to detect a rotor fault in a small cage rotor inverter-fed induction machine. In particular, the system computes the values of two indexes introduced by the authors in previous work. The capability of the aforementioned indexes to detect rotor asymmetries in open loop asynchronous AC drive systems has been previously...
The waterjet (WJ) technology, whose characterization involves phenomena belonging to different fields of physics, presents some particular aspects that make it essential in some manufacturing operations where it is important to cut special or hard-to-machine materials by means of a cold process. In this paper, the relationships between the electric input signals and the mechanical and fluid-dynamic...
This paper presents an approach to early fault detection for inverter fed induction motor drives. The method relies on a simple algorithm, which analyzes the line current signal acquired upstream from the rectifier-inverter set. The diagnostic system proposed here, introduces an ad hoc index related to the health state of the induction motor. Experimental results, showing the satisfactory performance...
In this work a set of indexes able to define a suitable "footprint" of a Water jet system has been investigated. A on-line and non-intrusive monitoring and diagnostic system has been designed implementing an algorithm defined on the basis of the proposed indexes.
The waterjet (WJ) technology, whose characterization involves phenomena belonging to different fields of physics, presents some particular aspects which make it essential in some manufacturing operations where it is important to cut special or hard to machine materials by means of a cold process. In the present work, the correlations between the electric input signals, the mechanical and the fluid-dynamic...
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