Abstract
The current injection schemes for unidirectional three-phase diode bridge rectifiers are widely utilised in industrial and aerospace applications. The additional circuitry in combination with modern control strategies mitigate the effects of the conversion in the mains, offers acceptable dynamic and reduces size/weight for the development of compact and robust power converters. This paper is the second part of this work and it overviews the most promoted self-commutated (active) and hybrids ac-dc configurations given in literature. The operation and characteristics of these proposals are reported in this review, extending the first part that focused the analysis on passive networks.
Highlights
Three-phase diode ac-dc power converters are the classical election for high-power unidirectional purposes [1, 2]
Current injection techniques are a suitable alternative for the mitigation of undesired features of the well-known diode bridge rectifiers [7]
This architecture comprises a six-pulse diode bridge and an active power filter (APF) in shunt connection, while the output dynamic is controlled with three interleaved buck-type converters
Summary
Three-phase diode ac-dc power converters are the classical election for high-power unidirectional purposes [1, 2]. The easier solution to overcome the high amount of harmonic content in the ac-side of this topology apparently is the use of power filters connected in the mains side [3,4,5] These are either passive, active or hybrid independent networks aimed to clean up the current spectrum with the impact in the normal behaviour of the system. The self-commutated and hybrid current injection strategies are more likely to be implemented in applications where high dynamic control of the output and ac currents with high quality are required [2] They provide wide operation range, higher dynamic and smaller size compared to the passive designs presented in the first part [9].
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