A new design methodology for multipulse rectifiers with Delta auto-connected transformers and a retrofit application in Adjustable Speed Drives (ASDs)
Nenhuma Miniatura disponível
Data
2012-12-01
Autores
Oliveira, P. S. [UNESP]
De Seixas, F. J M [UNESP]
E Silva, L. S C [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Resumo
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. © 2012 IEEE.
Descrição
Palavras-chave
18-pulse rectifier, AC input, Adjustable-speed drives, Bridge rectifiers, DC voltage, Diode bridge, High power factor, Line voltage, Low ripple, Mathematic model, Multi-pulse rectifiers, New design, Output voltages, Retrofit techniques, Three-phase rectifiers, Total harmonic distortion (THD), Voltage and current waveforms, Bridge circuits, Electric autotransformers, Electric power factor correction, Industrial applications, Rectifying circuits, Retrofitting, Topology, Variable speed drives, Electric rectifiers
Como citar
2012 10th IEEE/IAS International Conference on Industry Applications, INDUSCON 2012.