Abstract
The review of methods of post-repair tests of traction asynchronous motors under conditions of locomotive depot is carried out.The necessity of introducing special stands for post-repair tests is shown in order to improve their quality, reduce the number of failures of service equipment, improve safety of the railway transport. Let’s consider a question of power supply of the research asynchronous engine in wide frequency range and also a possibility of creation of the universal stand for testing important asynchronous engines of the electrorolling stock. Survey of possible versions of the scheme mutual loadings of asynchronous electrical machines which can be used for testing traction asynchronous engines of the rolling stock is executed. Such systems can be constructed both with use of the static converter of frequency, and without it. The given short characteristic of each alternative, certain advantages and shortcomings of each of system options. It is shown that systems with use of static converters of frequency differ in high power efficiency, allow to carry out tests in the wide frequency range of power supply, however have higher prime cost. Schemes without converters of frequency differ in smaller power efficiency, impossibility to carry out tests in the wide range of frequency of power supply, high level of consumption of reactive power . The results of the carried-out analysis can be used when choosing rational option of a system mutual loadings of asynchronous electric motors which will differ in higher functionality and power efficiency. Use of such systems will allow to lower capital expenditure for creation new and modernization of traction electrical machines that exist at the station for test.
Highlights
According to DSTU GOST 2582:2017 [1] electrical machines of the traction rolling stock of the main and industrial transport at acceptance tests for one hour at current which gives excess of temperature of windings which corresponds to excess of temperature at the nominal mode. this value of current, which corresponding to the sentry of the mode
The largest power efficiency of acceptance tests can be reached by use of a system mutual loading of traction electrical machines [2]
Let's define necessary conditions for introduction of the asynchronous engine to the generating mode, as slidings for the generating mode is in limits -∞ < s < 0, it is possible to determine the frequency of power supply of the engine as follows: ( ) nam = nsmr 1 − se, (3)
Summary
According to DSTU GOST 2582:2017 [1] electrical machines of the traction rolling stock of the main and industrial transport at acceptance tests for one hour at current which gives excess of temperature of windings which corresponds to excess of temperature at the nominal mode. this value of current, which corresponding to the sentry of the mode. Requirements of the corresponding standards and rules of repair of the traction and motorvagonny rolling stock of the main and industrial transport provide carrying out acceptance tests of everyone newly the manufactured or repaired traction electrocar [1]. These tests represent an important part of technological process of production or repair of the electrical machine, material expenses on which enter prime cost of end products. The quality of technical control which is carried out at acceptance tests of traction electrical machines in a final case defines reliability and non-failure operation work of the locomotive, and respectively and cost efficiency of rail transportation on the main and industrial transport. The largest power efficiency of acceptance tests can be reached by use of a system mutual loading of traction electrical machines [2]
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