Title :
Improved three-phase high-quality rectifier with line-commutated switches
Author :
Marafao, J.A.G. ; Pomilio, José Antenor ; Spiazzi, Giorgio
Author_Institution :
Sch. of Electr. & Comput. Eng., Univ. of Campinas, Brazil
fDate :
6/23/1905 12:00:00 AM
Abstract :
The paper presents a three-phase diode rectifier with an add-on simple cell with line-frequency commutated AC switches that is able to greatly improve both power factor and output voltage regulation of rectifiers with passive L-C filters. The boost action introduced by the commutation cell allows for a complete compensation of the voltage drop across the input inductors, so that output voltage regulation can be maintained from no-load to full-load. Moreover, as compared to other line-frequency commutated rectifiers, the proposed circuit allows compliance with the low-frequency harmonic limits defined in the technical report IEC 1000-3-4 for any power range. High-efficiency and minimum EMI are obtained due to the low-frequency commutations. A converter prototype was built and tested. The results confirm the theoretical analysis
Keywords :
commutation; rectifying circuits; switches; switching circuits; IEC 1000-3-4; boost action; commutation cell; full-load; high efficiency; input current analysis; line-commutated switches; line-frequency commutated AC switches; low-frequency harmonic limits compliance; minimum EMI; no-load; output voltage regulation; passive L-C filters; power factor; three-phase diode rectifier; three-phase high-quality rectifier; voltage drop compensation; Circuits; Diodes; Inductors; Passive filters; Power harmonic filters; Power system harmonics; Reactive power; Rectifiers; Switches; Voltage control;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954199
