Pulse doubling in parallel convertor configurations with interphase reactors

Abstract

It is shown that rectification and reinjection of the DC ripple can double the number of pulses of parallel connected AC/DC convertors with interphase reactors. Theoretical and experimental evidence is provided to demonstrate that the combined use of phase-shifting and DC ripple reinjection techniques effectively quadruples the pulse number of bridge rectifiers and inverters. Although the analysis is general, the results displayed relate to the conversion of a conventional 12-pulse double bridge for use as a 24-pulse configuration.