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On the Condition Monitoring of Induction machines
(2003-12-03)
The research of condition monitoring of electric motors has been wide for several decades. The research and development at universities and in industry has provided means for the predictive condition monitoring. Many ...
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 ...
Power line communication in motor cables of variable-speed electric drives − analysis and
(Lappeenranta University of Technology, 2008-10-31)
Data transmission between an electric motor and a frequency converter is required in variablespeed electric drives because of sensors installed at the motor. Sensor information can be used for various useful applications ...
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 ...
Applicability of Power-Line Communications to Data Transfer of On-line Condition Monitoring of Electrical Drives
(2003-08-29)
The research of power-line communications has been concentrated on home automation, broadband indoor communications and broadband data transfer in a low voltage distribution network between home andtransformer station. ...
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 ...
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 ...
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 ...
Radio Frequency Measurement Method for Detecting Bearing Currents in Induction Motors
(Lappeenranta University of Technology, 2009-05-28)
Induction motors are widely used in industry, and they are generally considered very reliable. They often have a critical role in industrial processes, and their failure can lead to significant losses as a result of shutdown ...
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 ...