Download Advanced DC/DC Converters by Fang Lin Luo, Hong Ye PDF

By Fang Lin Luo, Hong Ye

DC/DC conversion suggestions have passed through fast improvement in contemporary many years. With the pioneering paintings of authors Fang Lin Luo and Hong Ye, DC/DC converters have now been looked after into their six generations, and by means of a coarse count number, over 500 diversified topologies at present exist, with extra being built every one year.

Advanced DC/DC Converters deals a concise, sensible presentation of DC/DC converters, summarizing the spectrum of conversion applied sciences and offering many new rules and greater than a hundred new topologies. The remedy starts off with history fabric on DC/DC conversion and discussions on voltage raise and super-lift converters. It then proceeds via every one iteration, together with the groundbreaking 6th generation--converters constructed by way of the authors that may be cascaded for top voltage move achieve.

More than 320 figures, 60 tables, and 500 formulae let you extra simply grab the general constitution of complicated DC/DC converters, supply speedy entry to express info, and assist you fast confirm the values of your personal circuit elements. Nowhere else within the literature are DC/DC converters so logically taken care of and systematically brought. Nowhere else are you able to locate distinct details on prototype topologies that signify a tremendous contribution to fashionable strength engineering.

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25 Buck-boost converter. 26 Forward converter. where N is the transformer turn ratio, and k is the conduction duty cycle k = ton/T. In order to exploit the magnetic ability of the transformer iron core, a tertiary winding can be employed in the transformer. 27. 27 Forward converter with tertiary winding. 28 Push-pull converter. 2 Push-Pull Converter The boost converter works in push-pull state, which effectively avoids the iron core saturation. 28. Since there are two switches, which work alternately, the output voltage is doubled.

10) where T is the repeating period T = 1/f, f is the chopping frequency, ton is the switch-on time, and k is the conduction duty cycle k = ton/T. By using this converter it is easy to obtain the random output voltage, which can be higher or lower than the input voltage. It provides great convenience for industrial applications. 24 Boost converter. 2 Transformer-Type Converters Since all fundamental DC/DC converters keep the linkage from input side to output side and the voltage transfer gain is comparably low, transformertype converters were developed in the 1960s to 1980s.

Preliminary prototypes can be derived from choppers. 2 Multiple-Quadrant Choppers Choppers are the circuits that convert fixed DC voltage to variable DC voltage or pulse-width–modulated (PWM) AC voltage. In this book, we concentrate on its first function. 1 Multiple-Quadrant Operation A DC motor can run in forward running or reverse running. During the forward starting process its armature voltage and armature current are both positive. We usually call this forward motoring operation or quadrant I operation.

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