NonIsolated DC-DC Quadratic Ćuk Converter for Wide Conversion Range Applications

Non‐isolated high step‐up / step‐down DC–DC quadratic Ćuk converter

“…As previously mentioned, a preliminary analysis was presented in Ref. 28, although this work comprises a more in-depth investigation of the quadratic Cuk converter as derived in the forthcoming subsections. First stage [t 0 , t 1 ] (Figure 2A): The active switch S is turned on at t = t 0 .…”

“…Considering that this is a follow‐up investigation of the analysis carried out in Ref. 28, this work is concerned with the study of both step‐down and step‐up modes aiming at the development of a consistent design procedure. The power stage conception comprising an in‐depth qualitative and quantitative analysis is carried out in Section 2.…”

“…A preliminary version of this topology was formerly presented by the authors in Ref. 28, but only the operation in step‐up mode was described and the converter was not assessed experimentally. Some prominent advantages include wide conversion ratio for step‐up/step‐down applications; continuous currents drawn from the input source and supplied to the output stage, with consequent reduction of EMI levels; both the output voltage and input voltage have the same polarity; and reduced number of components when compared with the simple cascade association of two Ćuk converters.…”