Survey of Topology Morphing Control Techniques for Performance Enhancement of Galvanically Isolated DC-DC Converters

Abstract

This paper provides a systematic survey on the topology morphing control techniques used in the galvanically isolated dc-dc converters. Existing techniques are broadly categorized based on the part where a converter changes its topology: at the input side, at the output side, and the advanced techniques that cannot be categorized in the first two groups. The techniques span from the simple reconfiguration between the full-and half-bridge switching cells similar to the conventional power supplies with universal ac input to the advanced multi-track topology and reconfigurable resonant tanks. In addition, the described variety of application examples proves the wide application range and versatility of the topology morphing control. These include fault tolerance, efficiency curve flattening, input voltage range extension, and other properties. Hence, this article provides a single comprehensive source for researchers and engineers willing to enter the topic of topology morphing control.INDEX TERMS Galvanically isolated DC-DC power converter, topology morphing control, series resonant converters.

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“…The highfrequency link between the primary and secondary bridges is isolated using the transformer, with a secondary-to-primary turns ratio n. The turns ratio has been selected as n = 2.8. The number of primary winding turns N p and its optimal value N p,opt can be evaluated at every frequency using (24), for which the symbol definitions are as follows: copper resistivity ρ, mean length per turn (MLT), number of layers per winding n l , copper thickness t cu , primary winding printed circuit board (PCB) trace width w pri , secondary winding PCB trace width w sec , core cross section area A c , core effective volume V e , and the Steinmetz coefficients of the core k f e , α, and β.…”

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“…Thus, power converters [4,5], electrical motors [6] and generators [7], photovoltaic generation systems [8], and renewable energy as a whole [9] have received more attention and research activities. One of the results of the activity in this direction was the significant rise of electrical cars' market share [10,11], which in turn intensified the development in neighboring areas, which includes electric motor drives [12], batteries as well as technologies connected to them [13][14][15], power electronics, etc. [16].…”

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