NDLI: Multipulse power rectifier without using multiphase transformers

Content Provider	IEEE Xplore Digital Library
Author	Gomes de Freitas, L.C. Coelho, E.A.A. Parreira, E.F. Oliveira, M.A.G. de Freitas, L.C.
Copyright Year	2005
Description	Author affiliation: Fac. of Electr. Eng., Fed. Univ. of Uberlandia, Minas Gerais, Brazil (Gomes de Freitas, L.C.; Coelho, E.A.A.)
Abstract	In this paper it is proposed a novel hybrid three-phase rectifier capable to achieve high input power factor (PF), and low total harmonic distortion in the input currents (THD/sub 1/). The proposed hybrid high power rectifier is composed by a standard three-phase 6-pulse diode rectifier (Graetz bridge) with a parallel connection of single-phase boost rectifiers in each three-phase rectifier leg. Such topology results in a structure capable of programming the input current waveform and providing conditions for obtaining high input power factor and low harmonic current distortion. In order to validate the proposed hybrid rectifier, this paper describes its principles of operation, with detailed experimental results and discussions on power rating of the required boost converters as related to the desired total harmonic current distortion. It is demonstrated that only a fraction of the output power is processed through the boost converters, making the proposed solution economically viable for very high power installations, with fast pay back of the investment. Moreover, retrofitting to existing installations is also feasible since the parallel path can be easily controlled by integration with the existing DC-link. A prototype rated at 6 kW has been implemented in laboratory and fully demonstrated its operation, performance and feasibility to high power applications.
File Size	1957542
File Format	PDF
ISBN	0780392523
DOI	10.1109/IECON.2005.1568959
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-11-06
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Rectifiers Transformers Reactive power Total harmonic distortion Power system harmonics Diodes Bridges Leg Topology Harmonic distortion
Content Type	Text
Resource Type	Article

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