DocumentCode :
3262852
Title :
A new design methodology for multipulse rectifiers with Delta auto-connected transformers and a retrofit application in Adjustable Speed Drives (ASDs)
Author :
Oliveira, P.S. ; de Seixas, F.J.M. ; C e Silva, Luciano S.
Author_Institution :
Dept. of Electr. Eng., Univ. Estadual Paulista, Paulista, Brazil
fYear :
2012
fDate :
5-7 Nov. 2012
Firstpage :
1
Lastpage :
8
Abstract :
Multipulse rectifiers can replace a conventional six pulse three-phase rectifier (diode bridge) providing a DC voltage with low ripple, low Total Harmonic Distortion of current (THDi) and a high Power Factor (PF). In this context is presented a multipulse rectifier with generalized Delta-differential autotransformer topology, which can provide any level of DC output voltage for any level of three-phase AC input voltage. This paper presents all the possible configurations for Delta topology in order to choose, through graphics, one configuration that presents reduced weight and volume. The average voltage on the DC bus must be compatible with the DC voltage in the six pulse rectifier used in commercial ASDs. Therefore, it is possible to apply the retrofit technique to replace the conventional bridge rectifier by the proposed multipulse rectifier. Based on mathematic models and simulation results, an 18-pulse rectifier with Delta topology, 220 V of line voltage, 315 V of DC output, and rating 2.5 kW of power was designed, implemented and applied for three different commercial ASDs. Experimental results as voltage and current waveforms and results about PF and THDi will be presented.
Keywords :
autotransformers; differential transformers; rectifying circuits; variable speed drives; DC voltage; Delta autoconnected transformer; Delta differential autotransformer; adjustable speed drive; bridge rectifier; multipulse rectifier; power 2.5 kW; power factor; retrofit application; total harmonic distortion; voltage 220 V; voltage 315 kV; Bridge circuits; Equations; Mathematical model; Rectifiers; Topology; Variable speed drives; Windings;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Industry Applications (INDUSCON), 2012 10th IEEE/IAS International Conference on
Conference_Location :
Fortaleza
Print_ISBN :
978-1-4673-2412-0
Type :
conf
DOI :
10.1109/INDUSCON.2012.6451895
Filename :
6451895
Link To Document :
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