A specific control implementation on back-type active power filtering converters

Back-type active filtering power converters are not only capable of the elimination of input current harmonics. Their characteristics also include high efficiency, the absence of inrush current, the capability to obtain low DC output voltage, the capacity to protect against short circuit, and more. Thus, back-type active filtering power converters have the capability to become attractive power supplies for telecommunications applications. However, because power converters of this type must employ high-inductance reactors, they tend to increase equipment size and weight, and this has prevented their widespread use. This paper presents a new control strategy for back-type active filtering power converters which can reduce the size and weight of reactors and also eliminate the output voltage ripple component. Operating principles and simulation results are described by the authors.