Rok 2018

• Isolation of the relative decrease in magnetic permeability contribution to reluctance of an open magnetic circuit based on stray field measurements

  Publikacja

  • Z. Usarek

  - NDTnet - Rok 2018

  The goal of the study was to evaluate a relative decrease in magnetic permeability in open magnetic circuits based on stray magnetic field measurements. The boundary element method was used to simulate magnetic circuits with variable geometry and variable magnetic permeability. The simulated magnetic circuits were rectangular or bone-shaped flat samples. Reluctance was increased in the middle of the samples resulting in leakage...

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Rok 2016

• Current based Normalized Triple Covariance as a bearings diagnostic feature in induction motor

  Publikacja

  • L. Swędrowski
  • T. Ciszewski
  • L. Gelman

  - NDTnet - Rok 2016

  Diagnosis of induction motors, conducted remotely by measuring and analyzing the supply current is attractive with the lack of access to the engine. So far there is no solution, based on analysis of current, the credibility of which allow use in industry. Statistics of IM bearing failures of induction motors indicate, that they constitute more than 40% of IM damage, therefore bearing diagnosis is so important. The article provides...

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