Ultra Low Voltage DC-to-DC Converter for Solar Applications

Conference: PCIM Europe 2014 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
05/20/2014 - 05/22/2014 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2014

Pages: 7Language: englishTyp: PDF

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Edelmoser, K. H. (Institute of El. Drives and Machines,Technical University Vienna, Austria)
Himmelstoss, F. A. (Technikum Wien, University of Applied Science, Austria)

In the field of electrical solar power conversion there are some applications for ultra-low voltage converters operating directly from one solar cell. With its MP-Point in the range of 0.55V / 10A to 20A they are able to produce up to 10 W of electrical power. Especially in the field of fluorescent lighting and in case of decentralized control applications, where high DClink voltages are necessary, a simple and rugged converter for voltage level adaptation is needed. EMC is also an important topic. The major goal of the design described in this paper was to build up a converter starting from below than 300 mV with a peak power of 12 W with the requirement of a most simple structure. The proposed approach discussed in this paper uses a combined structure of an auxiliary self- and a main power supply to fulfill the given requirements: Minimized output current ripple of the cells, cell-optimized maximum power point tracking and optimal power quality of the supplying grid.