A NEW CONTROL STRATEGY TO IMPROVE THE PERFORMANCE OF A PWM AC TO DC CONVERTER UNDER UNBALANCED OPERATING-CONDITIONS Conference Paper

abstract

• Abnormal harmonics of significant magnitude are generated at the output and input terminals of a pulsewidth modulated (PWM) AC-DC converter under unbalanced operating conditions. A control strategy is presented to selectively cancel the generated lower order abnormal harmonics at the output and input terminals and thereby preserve the high-performance features of a PWM AC-DC converter. The proposed technique essentially involves computing the sequence components of the unbalanced input supply and suitably counter unbalances the PWM gating signals of the converter switches to cancel the generated abnormal harmonics. The technique is essentially a feedforward approach and is suitable for higher-power GTO-type PWM AC-DC converters. A procedure for implementing this technique in real time is discussed. Selected results are verified experimentally on a prototype PWM AC-DC converter.

name of conference

• PESC '91 Record 22nd Annual IEEE Power Electronics Specialists Conference

authors

• Enjeti, Prasad

published proceedings

• PESC 91 RECORD

author list (cited authors)

• ENJETI, P., & CHOUDHURY, S. A.

citation count

• 16

complete list of authors

• ENJETI, P||CHOUDHURY, SA

publication date

• January 1991

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• PESC Record - IEEE Annual Power Electronics Specialists Conference  Journal

keywords

• 40 Engineering
• 4007 Control Engineering, Mechatronics And Robotics
• 4008 Electrical Engineering
• 4009 Electronics, Sensors And Digital Hardware

Digital Object Identifier (DOI)

• 10.1109/PESC.1991.162703

International Standard Book Number (ISBN) 10

• 0780300904

start page

• 382

end page

• 389

URL

• http://dx.doi.org/10.1109/pesc.1991.162703