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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
engineering
Prediction of mechanical shaft failures due to pulsating torques of variable-frequency drives
IEEE Transactions on Industry Applications, Volume 46, No. 5, Article 5508410, Year 2010
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Description
Mechanical damage of rotating shafts has been reported for several years from various high-power applications. This paper shows that the variable frequency drive incorporated in a rotating shaft is one of the main root causes of mechanical-shaft failures. Simple analytical relationships show that the frequencies of the motor air-gap torque have a more significant impact on the mechanical-shaft failure than their magnitudes. Effects of mechanical damping are analytically derived and analyzed. Motor air-gap torque is successfully reconstructed using only the motor's voltage and current, thus avoiding torque sensors, which are subject to failure and errors. Simple relationships between frequencies of current harmonics and frequencies of motor pulsating torques are proposed. For pulsewidth-modulated inverters (two and multilevel), possible drive operating points that might excite the shaft's eigenmodes are predicted. Simulation results of four interleaved three-level neutral-point-clamped converters are analyzed for validation purposes. Experimental tests up to 35 MW are performed on a compressor test bed. The presented results confirm the accuracy of the proposed approach, which is particularly valuable for multimegawatt drive applications. © 2010 IEEE.
Authors & Co-Authors
Song-Manguelle, Joseph
Germany, Munich
Ge Global Research - Europe
France, Le Creusot
Ge Oil and Gas
United States, Niskayuna
Ge Global Research
Schröder, Stefan
Germany, Munich
Ge Global Research - Europe
Geyer, Tobias
New Zealand, Auckland
The University of Auckland
Ekemb, Gabriel
Cameroon, Douala
University of Douala
Nyobe-Yome, Jean Maurice
Cameroon, Douala
University of Douala
Canada, Rouyn-noranda
Université du Québec en Abitibi-témiscamingue
Statistics
Citations: 34
Authors: 5
Affiliations: 6
Identifiers
Doi:
10.1109/TIA.2010.2057397
ISSN:
00939994
Research Areas
Environmental