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The trends in power DC/DC conversion are not only size and weight reduction together with a good efficiency; EMI and mass production are a must as well. In this context, piezoelectric transformers seem to be the ideal solution, since they allow higher switching frequencies (size and weight reduction) while also providing high efficiencies. Additionally, they are not magnetic devices, which facilitates...
In higher education courses, students must face the design of system feedback loops. Power electronics and particularly continuous power supplies provide an ideal environment to introduce classical control theory. This paper shows a simple way to experimentally obtain the dynamic behavior of DC/DC converters. The required material is quite common in any electronic laboratory: a function generator,...
This paper uses a previously developed model of the heat transfer fluid (HTF) system of a Parabolic Trough Collector (PTC) thermosolar Plant to optimize the control of the heating of the HTF when it passes through the rows of the collectors. Three control estrategies have been analyzed and compared to the PID currently used in this sort of plants.
This paper presents a novel system that allows elevating large structures by using a set of lifting towers that, adequately controlled with a synchronized operation, succeed in pulling the spatial mesh up to the height where it should stay. By doing so, the mounting of the spatial mesh can be carried out on ground in an easier and, most important of all, safer way; it also gives rise to a shorter...
The behaviour of the series parallel resonant converter, PRC-LCC, with a capacitor as output filter is analyzed when operating on the optimum switching line. A polynomial is deduced to quickly compute what switching frequency and duty cycle are necessary at the control to obtain the desired output voltage and power in the converter. This polynomial is so simple that it is suitable for being implemented...
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