DOI: https://doi.org/10.15587/2312-8372.2018.141384

Improvement of the method of calculation of mechanical characteristics of a traction motor of direct current with combined excitation

Ivan Kostenko

Abstract


The object of the study is the process of appearing an electromagnetic moment in traction motors of combined excitation of a trolleybus at synchronous inclusion of both components of the excitation system. This process is formally presented as mechanical characteristics – dependence of an electromagnetic moment of the motor from excitation currents.

One of most problem points is to determine the influence of excitation currents of the series and separate winding on an electromagnetic moment of the motor as a continuous dependence that allows to create a system of managing the traction drive with DC-DC excitation transformer. Peculiarities of the motor magnetic system are also taken into account.

During the study there was used the method of finite elements in the flat-parallel target setting of calculating moments by the results of calculating the magnetic field with the further regression analysis of results of digital experiments using Chebyshev polynomials on the set of equidistant points. 

There was received the continuous dependence of an electromagnetic moment from excitation currents as a polynomial that can be used both at creating managing systems DC-DC by the excitation transformer and at modeling operation modes of the traction drive as a whole. It is connected with the fact that the offered polynomial type has a continuous type dependency and its derivatives at all possible values of currents at the drive work. According to the results of the regression analysis, the maximal deviation of calculated dependencies doesn’t exceed 0,052, and mean deviation is no more 0,041. It proves the adequacy of the received dependencies to the results of the digital experiment on determining an electromagnetic moment.

Due to it, there is provided the possibility of modeling operation modes of the traction drive based on the motor with combined excitation and DC-DC transformer. The managing system parameters, received by modeling results, allow to raise energetic characteristics of trolleybuses. Comparing with analogous known systems, it provides more rational use of electric energy on thrust of the rolling stock. 


Keywords


mechanical characteristics; traction drive; combined excitation; method of finite elements

References


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GOST Style Citations


Liubarskyi B. H. Teoretychni osnovy dlia vyboru ta otsinky perspektyvnykh system elektromekhanichnoho peretvorennia enerhii elektrorukhomoho skladu: dys. … d-ra tekhn. nauk. Kharkiv: Natsionalnyi tekhnichnyi universytet «Kharkivskyi politekhnichnyi instytut», 2014. 368 p.

Pavlenko T., Shavkun V., Petrenko A. Ways to improve operation reliability of traction electric motors of the rolling stock of electric transport // Eastern-European Journal of Enterprise Technologies. 2017. Vol. 5, Issue 8 (89). P. 22–30. doi: https://doi.org/10.15587/1729-4061.2017.112109 

Pan L., Zhang C. An Integrated Multifunctional Bidirectional AC/DC and DC/DC Converter for Electric Vehicles Applications // Energies. 2016. Vol. 9, Issue 7. P. 493. doi: https://doi.org/10.3390/en9070493 

Brazis V., Kroics K., Grigans L. Scientific Laboratory Platform for Testing the Electric Vehicle Equipped with DC Drive // Latvian Journal of Physics and Technical Sciences. 2014. Vol. 51, Issue 5. Р. 56–64. doi: https://doi.org/10.2478/lpts-2014-0030 

Sposib oslablennia polia tiahovoho elektrodvyhuna zmishanoho zbudzhennia: Pat. No. 60109 UA. MPK (2006.01) N02R 7/06 / Kharchenko V. F. et. al.; zaiavnyk ta pravovlasnyk KhNAMH. No. u201013973; declareted: 23.11.2010; published: 10.06.2011, Bul. No. 11.

Andriychenko V. P., Zakurdai S. O., Kostenko I. O. Improvement of the method used for control of starting direkt-currentrailway motor // Eastern-European Journal of Enterprise Technologies. 2014. Vol. 1, Issue 8 (67). P. 32–35. doi: https://doi.org/10.15587/1729-4061.2014.20123 

Ravino V. V., Sacukevich V. N., Galyamov P. M. Approksimaciya krivoy namagnichivaniya tyagovyh elektrodvigateley trolleybusov // Energetika. Izvestiya vysshih uchebnyh zavedeniy i energeticheskih ob'edineniy SNG. 2007. Issue 1. P. 27–33.

Lyubarskiy B. G. Modelirovanie i razrabotka kombinirovannogo vozbuzhdeniya svarochnyh generatorov postoyannogo toka s cel'yu uluchsheniya ih tekhniko-ekonomicheskih pokazateley: diss. … kand. tekhn. nauk. Kharkiv, 2000. 170 p.

Finite Element Method Magnetics: HomePage. URL: http://www.femm.info/wiki/HomePage

Meeker D. Series-wound heteropolar inductor motor for automotive applications // 2016 IEEE Transportation Electrification Conference and Expo (ITEC). 2016. doi: https://doi.org/10.1109/itec.2016.7520203 

Ryabov E. S. Bezreduktorniy tyagoviy privod na osnove reaktivnogo induktornogo dvigatelya s aksial'nym magnitnym potokom dlya skorostnogo elektropodvizhnogo sostava: diss. … kand. tekhn. nauk. Kharkiv, 2011. 162 p.

Modelyrovanye tiahovoho bezreduktornoho pryvoda na osnove ynduktornoho dvyhatelia s aksyalnym mahnytnym potokom / Riabov E. S. et. al. // Visnyk Natsionalnoho tekhnichnoho universytetu "Kharkivskyi politekhnichnyi instytut". 2010. Issue 57. P. 243–251.

Lyubarskiy B. G., Yakunin D. I. Imitacionnoe modelirovanie mekhanizma naklona kuzova s lineynym elektromekhanicheskim preobrazovatelem // MATLAB: materialy V Mezhdunarodnoy nauchnoy konferencii. Kharkiv: BET, 2011. P. 425–436.







Copyright (c) 2018 Ivan Kostenko

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ISSN (print) 2226-3780, ISSN (on-line) 2312-8372