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  1. 3 Czasopismo Techniczne

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  1. 3 2015

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  1. 3 Zając M.

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Control of electric drive by means of inverse dynamics

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Zając M.
Czasopismo Techniczne
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PL
This paper presents a method for positioning an electric drive with an elastic mechanical part by applying the inverse problem of dynamics. The presented assumptions take into account technological requirements and limitations of dynamic variables. The desired trajectory of the mechanical part of the electromechanical system has also been determined. On this basis, an algorithm for determining the control voltage waveform is proposed.
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Monitoring of electromechanical system using time-frequency analysis

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Zając M.
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PL
The paper presents the investigation results of the effectiveness of applying wavelet methods and the Wigner-Ville transformation in states monitoring of typical elements of the AC drive. As an example the electric drive system consist of the voltage inverter powering the squirrel-cage induction motor was showed. A case of complex mechanical load was also investigated. An influence of the decomposition level and the selection of the basic wavelet shape as well as an influence of the selection of the time period of the Wigner-Ville method on the faults detection sensitivity and the effectiveness of the diagnostic inference were examined.
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Wavelet analysis for location of faults on drive transmission system

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Zając M.
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PL
In dynamics of milles driven with electric engines issues of the drive transmission systems nonlinearity will matter greatly, especially in case of the need to conduct the identification of faults. The paper presents an example of applying wavelet analysis for investigating chosen faults in the non-linear arrangement of the drive transmission so as: appearing of backlash in mechanical connections and damaging a roller bearing. Also a case of non-linear damping in the arrangement of the mill was taken into account.
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