Search results for: CURRENT COLLECTOR DIAGNOSTIC

• 3D scanning system for railway current collector contact strips

  Publication

  • S. Judek
  • L. Jarzębowicz

  - Computer Applications in Electrical Engineering - Year 2013

  Undisturbed collection of current from a contact wire of the catenary constitutes one of the basic elements in reliable operation of electrified rail transport, particularly when vehicles move at high speed. Quality of current collection is influenced by the construction of catenary and current collectors, as well as by the technical condition and regulation of these two elements. Total contact force of a current collector head...

• Wear estimation of current collector contact strips by analysis of a 3D scanning results

  Publication

  • L. Jarzębowicz
  • S. Judek

  - Computer Applications in Electrical Engineering - Year 2013

  The technical condition of current collector contact strips is very important when operational reliability of railway transportation is considered. The authors proposed a novel measurement system based on a 3D camera to register the shape and dimensions of the current collector contact strips surface. The system was installed above the railway track for tests in target ambient. During the trial operation a few dozen of contact...

• A new approach to determination of the two-mass model parameters of railway current collector

  Publication

  • A. Wilk
  • K. Karwowski
  • S. Judek
  • M. Mizan

  - Year 2015

  The paper presents two mathematical models of railway current collectors both with two degrees of freedom. The first one, hereinafter Pantograph Articulated Model (PAM), has one degree of freedom in rotational motion and the second degree of freedom in translational motion. The second model, called henceforth as Pantograph Reference Model (PRM), has both degrees of freedom in translational motion. Differential equations of the...

• A new approach to determination of the two-mass model parameters of railway current collector

  Publication

  • A. Wilk
  • K. Karwowski
  • S. Judek
  • M. Mizan

  - Technika Transportu Szynowego - Year 2015

  The paper presents two mathematical models of railway current collectors both with two degrees of freedom. The first one, hereinafter Pantograph Articulated Model (PAM), has one degree of freedom in rotational motion and the second degree of freedom in translational motion. The second model, called henceforth as Pantograph Reference Model (PRM), has both degrees of freedom in translational motion. Differential equations of the...

• Measurements and Analysis of Motor Supplying Current Waveform for Diagnostic Purposes

  Publication

  • L. Swędrowski

  - Measurement Automation Monitoring - Year 2003

  Podano proponowaną metodę diagnostyki łożysk tocznych w silnikach indukcyjnych poprzez pomiar i analizę prądu zasilającego. Przedstawiono opracowany system pomiarowy oraz wyniki badań na łożyskach o specjalnie wprowadzonych uszkodzeniach.

• Measuring system for analysis of motor supplying current for diagnostic purposes

  Publication

  • L. Swędrowski

  - Year 2005

  Problemy, jakie pojawiają się przy interpretacji wyników pomiarów prądu silnika dla celów diagnostycznych wynikają z różnicy częstotliwości składowych obliczonych teoretycznie i uzyskanych w badaniach eksperymentalnych. W przedstawionym systemie pomiarowym problem ten rozwiązano w ten sposób, że pomiar częstotliwości sieci zasilającej i prędkości obrotowej jest wykonywany w tym samym przedziale czasowym, co pomiar składowych widma.

• Current Problems in Diagnostic Radiology

  Journals

  ISSN: 0363-0188

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

  Publication

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

  - NDTnet - Year 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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• Current-based higher-order spectral covariance as a bearing diagnostic feature for induction motors

  Publication

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

  - INSIGHT - Year 2016

  Conducting the diagnosis of induction motors remotely by analyzing the supply current is an attractive prospect with the lack of access to the engine. Currently, there is no solution, based on analysis of the current, the credibility of which would allow its use in industry. The statistics of bearing failures in induction motors indicate that they constitute more than 40% of induction motor damage, therefore, bearing diagnosis...

• Comparison of induction motor bearing diagnostic test results through vibration and stator current measurement

  Publication

  • T. Ciszewski
  • L. Swędrowski

  - Computer Applications in Electrical Engineering - Year 2013

  The paper discusses results of tests performed by authors, related to the angine bearings diagnostic using vibration and stator current measurements. The paper contains the description of an automatic measurement system, developed for measurement of those harmonics and processing that to obtain bearing diagnostic information. System was tested on objects with intentionally made defects in bearings, results of this test was also...