Abstract
To effectively suppress the input line current harmonics of a 12-pulse rectifier under slightly complex hardware, this article proposed an input line current step-tripling scheme for a 12-pulse rectifier using a novel passive four-tap changer (FTC). The proposed FTC consists of a retrofitted four-tap interphase reactor (RFT-IPR) and four auxiliary diodes. Two auxiliary diodes are connected to the inner taps of the RFT-IPR, but the other two auxiliary diodes are connected to the outer taps of the RFT-IPR. The inner and outer auxiliary diodes modulate and increase the output current states of the rectifier bridges together first; then, the FTC extends the 12-step to 36-step input line current, and the near sinusoidal input current with 3% THD is obtained. The proposed FTC not only has a very low capacity (2.6% of the output power) but also does not require any active switching device aside from four auxiliary diodes; thus, the proposed scheme is a cost-effective, reliable, and efficient solution to harmonics pollution. An experimental prototype with an output power of 2.4 kW is built, and the correctness of the theoretical analysis is verified by the experimental results.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
