No abstract

No abstract

Electromagnetic elements such as inductance are not used in switched-capacitor converters to convert electrical power. In contrast, capacitors are used for storing and transforming the electrical power in these new topologies. Lower volume, higher power density, and more integration ability are the most important features of these kinds of converters. In this paper, the most important switched-capacitor converters topologies, which have been developed in the last decade as new topologies in power electronics, are introduced, analyzed, and compared with each other, in brief. Finally, a 100 watt double phase half-mode resonant converter is simulated to convert 48V dc to 24 V dc for light weight electrical vehicle applications. Low output voltage ripple (0.4%), and soft switching for all power diodes and switches are achieved under the worst-case conditions.

Switched-capacitor converters (SeC) are electromagnetic component less converters in their power stage for converting or transforming electrical power. But, they only use capacitors in the power stage as the power storage or power transformer component. Low volume, high power density, and integration ability are the most important features of these converters. Among various active cell balancing topologies, sees are used for battery cells balancing because they can easily be implemented with low volume and low cost. However, one of the most important problems of the sees is their low balancing process speed of the battery cells when their numbers is increased. In this paper, a new algorithm is proposed to increase the balancing process speed of the connected several cells in series. Here, principles of this algorithm are described in detail, and it is compared to the conventional algorithms. Balance process speed improvement of the proposed algorithm is confirmed by computer simulation that shows a meliorated balancing speed of the proposed approach.

No abstract