Title :
AC drives in metal industries
Author_Institution :
Metals Ind. Dept., Siemens Adv. Eng. Pte Ltd., Singapore
Abstract :
Today all variable speed drives (VSDs) in the metallurgical industry are AC drives. These range from simple Volts/Hertz (V/Hz) to vector controlled drives. Insulated gate bipolar transistor pulse-width modulated (IGBT PWM) inverters offer power ratings up to a few megawatts. Cycloconverters, multi-level gate turn-off (ML-GTO) inverters, and load commutated inverters (LCI) cover the upper range. Up to about 1000 kW (<10 kNm) is the domain of squirrel cage induction motors. Synchronous motors dominate the high power range. AC drives have not just achieved but also excelled the performance and power ratings which were once exclusive to DC drives. Apart from the intrinsic benefits of lower maintenance and size, AC drives offer energy efficient and clean power operation
Keywords :
AC motor drives; DC-AC power convertors; PWM invertors; bipolar transistor switches; commutation; cycloconvertors; insulated gate bipolar transistors; metallurgical industries; power bipolar transistors; power semiconductor switches; switching circuits; thyristor convertors; variable speed drives; IGBT PWM inverters; cycloconverters; load commutated inverters; metal industries; multi-level gate turn-off inverters; performance; power ratings; variable speed AC motor drives; AC motors; Commutation; Induction motors; Insulated gate bipolar transistors; Insulation; Machine vector control; Metals industry; Milling machines; Pulse width modulation inverters; Synchronous motors;
Conference_Titel :
Power Electronics and Drive Systems, 1997. Proceedings., 1997 International Conference on
Print_ISBN :
0-7803-3773-5
DOI :
10.1109/PEDS.1997.627497
