Title :
Design considerations for 12/24-pulse auto-connected rectifiers for large VA, PWM drive systems
Author :
Rendusara, D. ; Slater, K.J. ; Lee, B.S. ; Enjeti, P. ; Pitel, I. ; Gray, W.
Author_Institution :
Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA
Abstract :
Auto-connected multipulse (12/24 pulse) rectifier schemes are cost-effective methods for reducing line current harmonics in PWM motor drive systems. Employing these schemes to enhance utility power quality requires careful attention to several design considerations. In particular: excursion of DC-link voltage at no load; effect of pre-existing voltage distortion; impedance mismatches; unequal diode drops on rectifier current sharing; and performance are fully analyzed. Several corrective measures to improve the performance of 12/24-pulse rectifier systems are also discussed. Finally, experimental results on a 460 V, 60 Hz, 400 kVA commercial ASD, retrofitted with 12/24 pulse rectifier systems, are discussed in detail
Keywords :
AC-DC power convertors; PWM power convertors; harmonic distortion; motor drives; power conversion harmonics; rectifying circuits; variable speed drives; 12/24-pulse auto-connected rectifiers; 400 kVA; 460 V; 60 Hz; PWM motor drive systems; design considerations; impedance mismatches; line current harmonics reduction; no-load DC-link voltage excursion; performance improvement; rectifier current sharing; Diodes; Distortion measurement; Impedance; Motor drives; Performance analysis; Power quality; Pulse width modulation; Rectifiers; Space vector pulse width modulation; Voltage;
Conference_Titel :
Applied Power Electronics Conference and Exposition, 1999. APEC '99. Fourteenth Annual
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-5160-6
DOI :
10.1109/APEC.1999.750475
