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4. Blower Drive System Based on Synchronous Motor With Solid Salient-Pole Rotor: Performance Under Starting and Voltage Sag Conditions.

Author

Silva, Sidelmo M., Cardoso Filho, Braz J., Cardoso, Marcelo Murta G., and Braga, Mauro Rocha

Subjects
SYNCHRONOUS electric machinery, SYNCHRONOUS electric motors, ALTERNATING current machinery, ALTERNATING current electric motors, MECHANICS (Physics)
Abstract

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 Siderúrgica Belgo-Mineira, João 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. [ABSTRACT FROM AUTHOR]

Published
2003
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5. An Active Series Reactor for an Electric Arc Furnace: A Flexible Alternative for Power-Flow Control.

Author

Pires, Igor A., Cardoso, Marcelo Murta G., and Cardoso Filho, Braz J.

Abstract

Series reactors are used in electric arc furnaces (EAFs) to provide furnace operation with longer arcs, lower currents, and lower electrode consumption. Such reactors are very useful in the first melting period. Along with the molten scrap, the absence of the series reactor allows a higher power transfer to the EAF, reducing the tap-to-tap cycle and thus increasing productivity. This article proposes an active series reactor (ASR) based on static power converters that has the flexibility to dynamically change its impedance value during steel production. A plant simulation will demonstrate the effectiveness of this proposition. [ABSTRACT FROM PUBLISHER]

Published
2016
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