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Digital Library

of the European Council for Modelling and Simulation

 

Title:

Influence Of Eccentricity On Synchronous Reactive Frequency Doubler

Authors:

Aleksandrs Mesnajevs

Published in:

 

 

(2015).ECMS 2015 Proceedings edited by: Valeri M. Mladenov, Grisha Spasov, Petia Georgieva, Galidiya Petrova, European Council for Modeling and Simulation. doi:10.7148/2015

 

 

ISBN: 978-0-9932440-0-1

 

29th European Conference on Modelling and Simulation,

Albena (Varna), Bulgaria, May 26th – 29th, 2015

 

Citation format:

Aleksandrs Mesnajevs (2015). Influence Of Eccentricity On Synchronous Reactive Frequency Doubler, ECMS 2015 Proceedings edited by: Valeri M. Mladenov, Petia Georgieva, Grisha Spasov, Galidiya Petrova  European Council for Modeling and Simulation. doi:10.7148/2015-0393

DOI:

http://dx.doi.org/10.7148/2015-0393

Abstract:

This paper describes the influence of rotor eccentricity synchronous reactive frequency doubler’s characteristics. Specifically, the research is concentrated on the influence of rotor eccentricity on increased frequency EMF E2 value, that is induced it stator’s secondary winding.

To clarify this question the simulations by using the finite element method implemented in QuickField software, are applied.

There are many reasons why does eccentricity occur:

-      unbalance – an uneven distribution of a rotor’s mass;

-      bent shaft – damaged or curved shaft produces unequal air gap;

-      bearing – a bearing that for some reason has lost it’s lubrication, wear out fast (may also fail and damage remaining components;

loose foundation – the improper mounting of the machine without holding it rigidly to the ground causes the machine to vibrate and eventually leads to air gap’s inequality (Rezig and Mekideche 2010).

Eccentricity is considered because of the influence of the air gap variance on the electromagnetic field distribution. Both the voltage and current sine waves can be altered, and when viewed in a fast Fourier-transform, they appear as harmonic sidebands of main eccentricity frequency.

 

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