By Fang Lin Luo, Hong Ye
DC/DC conversion concepts have passed through swift improvement in fresh a long time. 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 various topologies at the moment exist, with extra being built every one year.
Advanced DC/DC Converters deals a concise, useful presentation of DC/DC converters, summarizing the spectrum of conversion applied sciences and featuring many new rules and greater than a hundred new topologies. The remedy starts off with historical past fabric on DC/DC conversion and discussions on voltage carry and super-lift converters. It then proceeds via every one iteration, together with the groundbreaking 6th generation--converters built through the authors that may be cascaded for prime voltage move achieve.
More than 320 figures, 60 tables, and 500 formulae let you extra simply seize the general constitution of complicated DC/DC converters, supply quick entry to express information, and assist you quick be certain the values of your personal circuit parts. Nowhere else within the literature are DC/DC converters so logically looked after and systematically brought. Nowhere else are you able to locate precise details on prototype topologies that characterize an immense contribution to trendy strength engineering.
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Extra resources for Advanced DC/DC Converters
According to the transferred power becomes large, the power losses increase largely. Main power losses are produced during the switch-on and switch-off period. How to reduce the power losses across the switch is the clue to increasing the power transfer efficiency. Soft-switching technique successfully solved this problem. Professor Fred Lee is the pioneer of the soft-switching technique. He established a research center and manufacturing base to realize the zero-current-switching (ZCS) and zero-voltage-switching (ZVS) DC/DC converters.
Vice versa, during quadrant II operation, S2 and D1 work, and S1 and D2 are idle. 6 The first-second quadrant chopper. 7 The third-fourth quadrant chopper. where k is the conduction duty cycle k = ton/T. 7. Dual quadrant operation is usually requested in the system with two voltage sources V1 and V2. Both voltage polarity is defined in the figure, we just concentrate their absolute values in analysis and calculation. Assume that the condition V1 > V2, the inductor L is ideal component. During quadrant I operation, S1 and D2 work, and S2 and D1 are idle.
However, most of the converters in the literature perform a single-quadrant operation. Some of them work in the push-pull status. In addition, their control circuit and topologies are very complex, especially, for the large difference between input and output voltages. These circuits will be introduced in the Chapter 8 in detail. 2 Multiple-Quadrant Switched Capacitor Luo-Converters Switched-capacitor DC/DC converters consist of only capacitors. Since its power density is very high it is widely applied in industrial applications.