Title :
A strategy for improving reliability of motor drive systems using a four-leg three-phase converter
Author :
Ribeiro, R.L.A. ; Jacobina, C.B. ; Lima, A.M.N. ; Silva, E. R C da
Author_Institution :
Dept. de Eng. Electr., UFPB, Mexico
Abstract :
This paper proposes a fault-tolerant technique for power converters in machine drive systems. With that purpose a four-leg inverter is employed so that the control flexibility is increased at a post-fault condition. The fault mode investigated is a misfiring of one, two, or three power top (bottom) switches. The fault tolerance is achieved by using a compensation strategy that permits control of the machine currents at both normal and post-fault operation. Simulated and experimental results demonstrate the validity of the strategy proposed
Keywords :
AC motor drives; PWM invertors; compensation; electric current control; machine control; reliability; switching circuits; PWM VSI; compensation strategy; control flexibility; fault mode; fault tolerance; fault-tolerant technique; four-leg three-phase converter; inverter; machine currents control; motor drive systems; post-fault condition; reliability improvement; switches misfiring; Circuit faults; Fault tolerance; Fault tolerant systems; Jacobian matrices; Leg; Motor drives; Pulse width modulation; Pulse width modulation inverters; Switches; Switching circuits;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 2001. APEC 2001. Sixteenth Annual IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
0-7803-6618-2
DOI :
10.1109/APEC.2001.911676
