Title :
A digital controller based cycloconverter-fed drive
Author :
Zhang, Songchun ; Wu, Fenglin ; Shen, Shumin ; Yang, Shuchun ; Ma, Xiaoliang
Author_Institution :
Tianjin Design & Res. Inst. of Electr. Drive, China
Abstract :
The first China-developed digital controller based cycloconverter-fed main drive of a rolling mill has been in operation since the end of 1995. The squirrel-cage motor drive has rating values of 2500 kW, 1300 V, 1230 A, 13.3/16.7 Hz and 400/500 RPM. The hardware of the controller is a general purpose programmable multiprocessor controller, SEMADYN-D, made by Siemens, and the vector control system of the drive is self-programmed. The motor drive controller has the following features: (1) sampling time assignation and delay time compensation; (2) VFD-type actual value evaluation; (3) motor current model and voltage model; and (4) rotor time constant correction. Test results are also shown at the end of the paper
Keywords :
cycloconvertors; digital control; induction motor drives; machine control; machine testing; machine theory; multiprocessing systems; power engineering computing; programmable controllers; rolling mills; rotors; squirrel cage motors; 1230 A; 13.3 Hz; 1300 V; 16.7 Hz; 2500 kW; SEMADYN-D; current model; cycloconverter; delay time compensation; digital controller; programmable multiprocessor controller; rolling mill; rotor time constant correction; sampling time assignation; squirrel-cage motor drive; test results; vector control system; voltage model; Control systems; Delay effects; Digital control; Hardware; Machine vector control; Milling machines; Motor drives; Rotors; Sampling methods; Voltage control;
Conference_Titel :
Power Electronics and Drive Systems, 1997. Proceedings., 1997 International Conference on
Print_ISBN :
0-7803-3773-5
DOI :
10.1109/PEDS.1997.627434
