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van Eijk, Casper (author)
This thesis presents the design and experimental evaluation of an in-line, active ultrasound, condition monitoring setup for the detection of contamination in offshore bearing grease. This process is divided into three distinct research steps. First of all, the influences that affect ultrasound propagation through a bearing grease sample have...
master thesis 2024
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van Ammers, Jeroen (author)
Submodules are the building blocks for MMC-type HVDC converters and therefore of utmost importance for converter reliability. In order to unlock smarter maintenance strategies for submodule semiconductors, the technical condition of the semiconductors needs to be estimated to form a health index. Besides the non-project-specific traditional...
master thesis 2023
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Yagüe Martín, Adrian (author)
Premature failures in large offshore Wind Turbines are often attributed to bearing failure despite gearboxes being designed and developed using the best bearing design practices. Furthermore, as turbine size and rated power increase, bearings display an enhanced tendency to fail. Unscheduled bearing replacement at sea is a complex, costly,...
master thesis 2020
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Sluimer, A.T. (author)
Electrical machines are used more often for many applications. This has caused the number of motors and generators to rise over the years. Reliability of these machines is an increasing demand, for industry relies heavily on the use of these machines. Maintenance is the best option to ensure reliability over the lifetime of these assets....
master thesis 2015
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Oskam, G.J.J. (author)
The aim of this thesis is to investigate whether other representation techniques of the in-cylinder pressure signal, besides the current pressure-crank angle curve, have the potential of improving the diagnosis in a condition monitoring program. Investigated are the quantitative representation of the heat release through Vibe parameters and the...
master thesis 2014
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Van Eeden, C.J. (author)
Large rotating machines in all kinds of applications ages due to operating stresses. Since many years the condition of stator insulation in these motors and generators is investigated using measurement of partial discharge (PD) and dielectric loss factor (tan delta). In particular, off-line and on-line methods of applying PD detection have...
master thesis 2010
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