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

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:

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