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Blower drive system based on synchronous motor with solid salient-pole rotor: performance under starting and voltage sag conditions

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4 Author(s)
Silva, S.M. ; Dept. de Engenharia Eletrica, Univ. Fed. de Minas Gerais, Belo Horizonte, Brazil ; Filho, B.J.C. ; Cardoso, M.M.G. ; Rocha Braga, M.

This paper presents a study developed on a three-phase 11-MW synchronous motor with a solid salient-pole rotor of a blower drive system of a blast furnace at the Companhia Siderurgica Belgo-Mineira, Joao Monlevade, Brazil. A mechanical model including motor, gears, couplings, and blower is used in a simulation study to evaluate the torsional dynamics and stresses during motor startup and voltage sag conditions. In addition, the operation of the synchronous motor under voltage sag is analyzed with a comparative study between complete and approximated models of the motor. The utilization of a dynamic voltage restorer to protect the drive system under this abnormal situation is also evaluated.

Published in:

Industry Applications, IEEE Transactions on  (Volume:39 ,  Issue: 5 )

Date of Publication:

Sept.-Oct. 2003

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