Title :
A quasi-passive modulation circuit improving the current waveform of conventional rectifiers
Author :
Xu, Jianhong ; Charette, André ; Rajagopalan, Venkatachari
Author_Institution :
Quebec Univ., Trois-Rivieres, Que., Canada
Abstract :
This paper proposes a new auxiliary modulation circuit to be retrofitted to an existing conventional AC/DC converter to improve line current waveform. The auxiliary circuit modulates the rectifier´s DC side current at triple line-frequency and injects a calculated amount of third harmonic current back into its AC side. This circuit takes advantage of DC ripple voltage to generate the modulation current. It consists of mainly passive components and can be easily retrofitted to existing rectifiers. Theoretical analysis, digital simulation results and experimental verification on a 12.5 kW prototype have been presented in this paper
Keywords :
AC-DC power convertors; circuit analysis computing; digital simulation; modulation; rectifying circuits; 12.5 kW; AC/DC converter; DC ripple voltage; auxiliary modulation circuit; conventional rectifiers; current waveform improvement; line current waveform improvement; passive components; quasi-passive modulation circuit; rectifier´s DC side current modulation; retrofitting; third harmonic current; triple line-frequency; Circuits; DC-DC power converters; Diodes; Frequency; Power harmonic filters; Rectifiers; Thyristors; Transformers; Virtual prototyping; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2000. PESC 00. 2000 IEEE 31st Annual
Conference_Location :
Galway
Print_ISBN :
0-7803-5692-6
DOI :
10.1109/PESC.2000.880523
