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93 results on '"Bruzzese, Claudio"'

2. Analysis and application of particular current signatures (symptoms) for cage monitoring in nonsinusoidally fed motors with high rejection to drive load, inertia, and frequency variations

Author

Bruzzese, Claudio

Subjects
Induction electric motors -- Analysis, Electric current converters -- Analysis, Electric current converter, Business, Computers, Electronics, Electronics and electrical industries
Abstract

In this paper, some original and effective fault indicators for broken-bar detection in power squirrel-cage induction motors are presented. A motor phase-current signature analysis can be performed by evaluating the typical ratios [I.sub.(7-2s)f]/[I.sub.5f] and [I.sub.(5+2s)f]/[I.sub.7f], [I.sub.(13-2s)f]/[I.sub.11f] and [I.sub.(11+2s)f]/[I.sub.13f], etc., which appear in the phase-current spectrum of faulted motors fed by nonsinusoidal voltage sources. The main advantages of the new indicators are the following: 1) accentuate insensitivity to disturbs such as load torque, drive inertia, and frequency variations; 2) low dependence with respect to machine parameters (except the pole number); and 3) linear dependence on fault gravity. They can be directly applied on motors fed by open-loop low-switching frequency gate turn-off/thyristor converters. Railway traction drives are possible targets. Application to mains-fed motors can be tried too, if suitable harmonics are present in the plant supply. A detailed analytical formulation for fault indicators is furnished, based on the multiphase symmetrical component theory; theoretical results have been supported by experimental work, performed by using a motor with an appositely prepared cage, and successively, method validation was achieved on three other industrial motors. Index Terms--Broken bars, fault indicators, induction motor, sideband calculation, spectral analysis, symmetrical components.

Published
2008

8. Computationally-Efficient Thermal Analysis of a Low-Speed High-Thrust Linear Electric Actuator with a 3D Thermal Network Approach

Author

Tessarolo, Alberto, Bruzzese, Claudio, Tessarolo, Alberto, and Bruzzese, Claudio

Subjects
Heating, Cold plates, Actuator, Cold plate, Heat transfer, Coils, Coil, Thermal analysis, Actuators
Abstract

Permanent-Magnet Synchronous Linear Motors (PMSLM) are more and more frequently used as all-electric direct-drive actuators in those applications where a force needs to be developed along a fixed direction. In this paper, an accurate 3D thermal model of a PMSLM is derived through a lumped-parameter network approach which exploits all the symmetries in the actuator structure to maximize the spatial density of nodes. Numerically-efficient techniques are then proposed to solve the thermal network analytically. Some experimental validations are finally presented based on the thermal testing of a laboratory prototype.

Published
2015

10. Trends in Fault Diagnosis for Electrical Machines

Author

Henao, Humberto, Capolino, Gerard-André, Fernández-Cabanas, Manés, Filippetti, Fiorenzo, Bruzzese, Claudio, Strangas, Elias, Pusca, Remus, Estima, Jorge, Riera-Guasp, Martín, and Hedayati-Kia, Shanin

Subjects
stator faults, rotor faults, rotor eccentricity, bearing fault, Diagnostic techniques, Electrical machines, INGENIERIA ELECTRICA
Abstract

[EN] The fault diagnosis of rotating electrical machines has received an intense amount of research interest during the last 30 years. Reducing maintenance costs and preventing unscheduled downtimes, which result in losses of production and financial incomes, are the priorities of electrical drives manufacturers and operators. In fact, both correct diagnosis and early detection of incipient faults lead to fast unscheduled maintenance and short downtime for the process under consideration. They also prevent the harmful and sometimes devastating consequences of faults and failures. This topic has become far more attractive and critical as the population of electric machines has greatly increased in recent years. The total number of operating electrical machines in the world was around 16.1 billion in 2011, with a growth rate of about 50% in the last five years [1].

Published
2014
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