Title :
A new modular motor-modular inverter (MM-MI) concept for medium voltage adjustable speed drive systems
Author :
Cengelci, E. ; Enjeti, P. ; Gray, W.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
In this paper, a new modular motor-modular inverter (MM-MI) concept for medium voltage adjustable speed drive (MV-ASD) systems is introduced. It is shown that a standard medium voltage motor winding connections can be reconnected into several three-phase groups, each powered by a separate three-phase PWM inverter, resulting in a high performance MV-ASD system. The proposed approach is fault tolerant and can continue to operate at reduced power levels, under inverter and/or motor faults. An example 250 hp, 4 pole, 60 Hz, 2300 V/4160 V motor winding connection diagram along with the associated inverter configurations is analyzed. Results from analysis are presented on the aspects of faults and motor operation under partial winding excitation. Experimental results on a low voltage (460 V), 10 hp ASD are demonstrated
Keywords :
AC motor drives; DC-AC power convertors; PWM invertors; machine windings; variable speed drives; 10 hp; 2300 V; 250 hp; 4160 V; 460 V; 60 Hz; MV adjustable speed drive system; inverter configurations; modular motor-modular inverter concept; partial winding excitation; three-phase PWM inverter; winding connections; Coils; Induction motors; Insulation; Medium voltage; Modular construction; Power electronics; Power quality; Power system reliability; Pulse width modulation inverters; Variable speed drives;
Conference_Titel :
Industry Applications Conference, 1999. Thirty-Fourth IAS Annual Meeting. Conference Record of the 1999 IEEE
Conference_Location :
Phoenix, AZ
Print_ISBN :
0-7803-5589-X
DOI :
10.1109/IAS.1999.806008
