Title :
A new modular motor-modular inverter concept for medium-voltage adjustable-speed-drive systems
Author :
Cengelci, Ekrem ; Enjeti, Prasad N. ; Gray, JamesW
Author_Institution :
Power Electron. Lab., Texas A&M Univ., College Station, TX, USA
Abstract :
In this paper, a new modular motor-modular inverter concept for medium-voltage adjustable-speed drive (MV-ASD) systems is introduced. It is shown that standard MV motor winding connections can be reconnected into several three-phase groups, each powered by a separate three-phase pulsewidth modulation 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 four-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 :
PWM invertors; fault tolerance; induction motor drives; variable speed drives; 10 hp; 2300 V; 250 hp; 4160 V; 460 V; 60 Hz; MV motor windings reconnection; fault tolerant approach; four-pole motor; induction motors; inverter faults; medium-voltage adjustable-speed-drive systems; modular motor-modular inverter; motor faults; reduced power levels; three-phase groups; three-phase pulsewidth modulation inverter; Associate members; Induction motors; Industry Applications Society; Medium voltage; Modular construction; Power system reliability; Power transformer insulation; Pulse inverters; Pulse width modulation inverters; Variable speed drives;
Journal_Title :
Industry Applications, IEEE Transactions on
