The output voltage of the traditional CUK PFC converter is negative, and an additional inverting amplifier circuit needed, which increases volume cost converter. A new type bridgeless topology proposed in this paper, makes have a positive without need circuit, has advantages simple control, high efficiency, low cost. Through optimization, one input capacitor reduced, two diodes are converted fr...

This paper derives general topological and electrical properties common to all lossless passive soft-switching converters with defined characteristics and proposes a synthesis procedure for the creation of new converters. The synthesis procedure uses the properties to determine all possible locations of the inductor and capacitor added to achieve soft switching. Then a set of circuit cells are ...

X. J. Zhou, 2, 3 T. Cuk, T. Devereaux, N. Nagaosa, and Z.-X. Shen Dept. of Physics, Applied Physics and Stanford Synchrotron Radiation Laboratory, Stanford University, Stanford, CA 94305 Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, CA 94720 State Key Laboratory for Superconductivity, Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese A...

This paper discusses the lexicographical concept of lexical functions (Mel' cuk and Zolkovsky, 1984) and their potential exploitation in the development of a machine translation lexicon designed to handle collocations. We show how lexical functions can be thought to reeect crosslinguistic meaning concepts for collocational structures and their translational equivalents, and therefore suggest th...