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Analysis of Cylindricity Error of High and Low Temperature Storage Tested Alternator Stators

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Abstract

This paper investigates the internal shape correctness of alternator stators occurring in high and low temperature storage tests. This kind of failure can affect the adequate operation of alternators since vibrations can occur during rotation of the other part of the alternator, the rotor. This error can reduce the efficiency of the alternator. The aim of this study is to examine the influence of different testing parameters, such as the temperature and the running time of the test, and whether or not the stator is equipped with a damping element. For the experiments we used the full factorial experimental design method. The measurement of the cylindricity of the specimens was done with a circular and position error measuring machine. From the measured data, special improvement ratios can be calculated in order to define the appropriate range of testing parameters that resulting greater deformity. A further aim is to compare the different cylindricity parameters and the features of theirs measured values.

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Abbreviations

T:

temperature, °C

t:

time, h

ρCYL :

improvement ratio of cylindricity, %

CYLtested :

cylindricity deviation remaining after rapid temperature change test, µm

CYLset :

cylindricity deviation remaining after setting the stator with brackets, µm

CYLp:

peak-to-reference cylindricity deviation, µm

CYLv:

reference-to-valley cylindricity deviation, µm

CYLt:

peak-to-valley cylindricity deviation, µm

CYLtt:

cylinder taper, µm

x1, x2, x3 :

transformed parameters

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Acknowledgement

This research was supported by the European Union and the Hungarian State, co-financed by the European Regional Development Fund in the framework of the GINOP-2.3.4-15-2016-00004 project, aimed to promote the cooperation between the higher education and the industry.

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Authors and Affiliations

  1. Institute of Manufacturing Science, University of Miskolc, Miskolc Egyetemváros, Miskolc, 3515, Hungary

    Gyula Varga & Viktoria Ferencsik

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  1. Gyula Varga
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  2. Viktoria Ferencsik
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Correspondence to Gyula Varga.

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Varga, G., Ferencsik, V. Analysis of Cylindricity Error of High and Low Temperature Storage Tested Alternator Stators. Int.J Automot. Technol. 21, 1519–1526 (2020). https://doi.org/10.1007/s12239-020-0143-3

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  • DOI: https://doi.org/10.1007/s12239-020-0143-3

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