A novel technique for efficiently extracting maximum power from photovoltaic (PV) panels is presented. The power conversion stage, which is connected between a PV panel and a load or bus, is a SEPIC or Cuk converter or their derived circuits operating in discontinuous inductor–current or capacitor–voltage mode. Method of locating the maximum power point (MPP) is based on injecting a small-signa...

This work was supported by CNPq. Dr. Spiazzi visit to the University of Campinas was supported by FAPESP. Abstract The effects of a non negligible source impedance, due to the presence of an input EMI filter, on the stability of Power Factor Preregulators with average current control are analyzed by using a State Space Averaged model. The modeling allows to derive a simple expression for the lo...

These techniques vary in many aspects as simplicity, digital or analogical implementation, sensor required, convergence speed, range of effectiveness, implementation hardware, popularity, cost and in other aspects. This paper presents in details comparative study between two most popular algorithms technique which is incremental conductance algorithm and perturb and observe algorithm. Three dif...

Department of Medicine, Addenbrooke’s Hospital, University of Cambridge, Cambridge CB2 0QW, UK (CUK, BJ, SJP, MET); School of Medicine, Tsinghua University, Beijing, China (BJ); Faculty of Law, University of Cambridge, Cambridge, UK (KL); Clinical Microbiology and Public Health Laboratory, Public Health England, Cambridge, UK (MJE, NMB, SJP, MET); Molecular Mycobacteriology, Research Center Bor...

Under conditions of order reduction, a nonlinear control of a bidirectional coupled-inductor Cuk converter suitable for large-signal applications is presented. The converter is accurately modeled as a second-order bilinear system and the conditions established for local controllability. The integration of converter state equations and the subsequent introduction of a linear recurrence between t...

In 1933, at the 5th Regional Sokol Meeting in Ljubljana which was at the time a place in the Yugoslav Kingdom, Skerlj carried out the first measurements of 189 gymnasts, active competitors; in 2000, at the World Cup Meeting in Ljubljana, Cuk and associates carried out measurements of 40 top gymnasts. Our analysis of identical variables has shown that there is no difference in body height and we...