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Design of Photovoltaic Microinverter for Off-Grid and Grid-Parallel Applications
(VDE Verlag, 2014)
The design and construction of a 500VA microinverter for photovoltaic applications is presented. The developed microinverter is capable of operating as a standalone AC voltage source for small loads or, alternatively, as a grid-parallel system. Possible applications are therefore small off-grid installations as well as installations where space constraints do not allow enough modules to be combined to use string inverters. The design of the microinverter is based on a two stage concept. Two alternative topologies for ...
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Assessment of the changeability of plastics processing systems
(Society of Plastics Engineers, 2014)
Changeable production systems are still being developed, especially in the field of plastics processing. Here, the assessment of the changeability is a decisive factor. This investigation deals with the assessment of the changeability of a modular pilot plant, and derives approaches for the further development of an evaluation system, as well as potential means to increase the changeability.
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Formation of morphology as a function of process control by foam injection molding of a functionally graded component
(Society of Plastics Engineers, 2014)
A special mold technology enables the production of foam injection molded components with locally differing foaming ratios. Thus, components with functionally graded foam structures can be produced in one processing step. The method (pull and foam method) is based on the idea of creating components with thin-walled areas with a high surface quality and partially foamed, thick-walled areas (e.g. with the function of integrated structural elements) in a controlled foaming process. This paper describes the characteristics ...
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Ergebnisse und Redundanz in der Diskussion um eWOM: Eine kritische Literaturauswertung
(Universität Paderborn, 2014)
Electronic Word-Of-Mouth (eWOM) und Online Rezensionen (OR) werden als einer der Schlüsselfaktoren für erfolgreichen E-Commerce identifiziert. Jedoch sind die beeinflussenden Motivationsfaktoren für das Verfassen sowie das Lesen von OR bis heute gesamtheitlich nur unzureichend untersucht. Die vorliegende Literaturauswertung sammelt die bisherigen Forschungsergebnisse mit dem Ansatz, ein möglichst breites Bild der Motive für eWOM-Aktivitäten zu geben. Das Ergebnis der extensiven Literaturanalyse zeigt, dass für ...
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Hybrid composite materials made of polypropylene with wood and polyethylene terephthalate fibers
(Society of Plastics Engineers, 2014)
We aim to manufacture injection molded components which consist of thermoplastics reinforced with fibers and which have improved properties (high strength and high notched impact strength). Thus, we intend to access new application fields for the not readily visible area of the automobile interior.