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Application of an embedded control system for aging detection of power converter components
(Lappeenranta University of Technology, 2016-12-02)
In modern power conversion applications, the converter fault tolerance and the reliability of a power supply have become key requirements. Condition monitoring of power supplies has been suggested to support these ...
Radio-frequency-based measurement methods for bearing current analysis in induction motors
(Lappeenranta University of Technology, 2014-12-15)
The most common reason for a low-voltage induction motor breakdown is a bearing failure. Along with the increasing popularity of modern frequency converters, bearing failures have become the most important motor fault ...
Monitoring of centrifugal pump operation by a frequency converter
(Lappeenranta University of Technology, 2011-05-27)
Centrifugal pumps are widely used in industrial and municipal applications, and they are an important end-use application of electric energy. However, in many cases centrifugal pumps operate with a significantly lower ...
Observations of Acoustic Emission in Power Semiconductors
(Lappeenranta University of Technology, 2015-12-19)
Industrial, electrical power generation, and transportation systems, to name but a few, rely heavily on power electronics to control and convert electrical power. Each of these systems, when encountering an unexpected ...
Variable speed drive in fan system monitoring
(Lappeenranta University of Technology, 2013-12-09)
Fan systems are responsible for approximately 10% of the electricity consumption in industrial and municipal sectors, and it has been found that there is energy-saving potential in these systems. To this end, variable ...
Thermal load analysis and monitoring of doubly-fed wind power converters in low wind speed conditions
(Lappeenranta University of Technology, 2017-11-30)
State-of-the-art wind power technology allows multi-megawatt installations in low wind areas. Meanwhile, the present development is focused on aerodynamic improvement, enhanced efficiency, and reliability. Research is ...