Improvement of the method of calculation of mechanical characteristics of a traction motor of direct current with combined excitation
Journal Title: Технологический аудит и резервы производства - Year 2018, Vol 4, Issue 1
Abstract
<p><em>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.</em></p><p><em>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.</em></p><p><em>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. </em></p><p><em>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.</em></p><p><em>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. </em></p>
Authors and Affiliations
Ivan Kostenko
Keywords
Related Articles
- EP ID EP527449
- DOI 10.15587/2312-8372.2018.141384
- Views 110
- Downloads 0
The use of audit as a tool for strategic control of marketing activities of Polish enterprises
<p><em>The paper is focused on marketing audit within the marketing system control. Marketing audit is one of the tools applied to assess and improve the use of marketing in corporate activity.</em></p><p><em>One of the...
Improvement of methodological principles of financial resources management of enterprises in economy of Ukraine
<p><em>The object of research is the financial and economic relations that arise in the process of managing financial resources of enterprises in the conditions of the national economy of Ukraine. One of the most problem...
Digital competencies analysis as vector of higher school reforming
<p><em>The object of research is digital literacy. There are many methods for assessing the level of digital literacy in society. Particular attention is paid to the conceptual model of the formation and evaluation of th...
Analysis of distribution laws of insulation indicators of high-voltage oil-fillled bushings of hermetic and non-hermetic execution
<p><em>The object of research is the distribution laws of capacitor-type insulation values that were obtained during preventive tests for both serviceable and defective high-voltage bushings of 110 kV of hermetic and non...
Investigation of the external experience of anti-crisis policy on the control of financial security of the banking system
<p><em>The object of research is the processes of shaping the anti-crisis policy of the developed countries of the world and Ukraine in the context of implementing measures to improve the level of financial security of t...