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The article contains information about policy public corporation «RZD» in energy-saving and energy efficiency. Assessment of energy efficiency of application back-to-back method in testing induction tractive motors was executed as an example on modeling testing process of motors type NTA-1200.

The article contains methodology for assigning losses in two-element frequency converter (in rectifier and dc-ac converter). which allow to replenish mathematical model of back to back rig test method for induction motors and to use it in design induction motor rig test, also for calculation electrical power test rig which consumed from electrical network. Practical value of the methodology is no need in using electrical measurement instrument for ac-dc power with frequency different from 50 Gz.

Each of the proposed circuits is composed of inverters. These devices are sources of non-sinusoidal voltage, whose frequency can vary within a wide load range of the test engine. Therefore, to measure the power in such conditions requires either the use of special complex of hardware-software complexes to perform the direct measurement or the development of indirect methods for determining capacity. Such methods proposed for each of the schemes. The essence of the developed methods consists in a preliminary experimental determination of the dependency of the losses in the rectifiers and rectifier-inverters circuits from the power supplied to him. These dependencies are further processed during the test, using only the General-industrial electric meters that measure power consumed by the frequency Converter, and the power consumed (generated) asynchronous motors is determined by the indirect (calculated) by. On the other hand, pre-experimentally received dependence of losses in frequency converters from power consumption trolled (generated) asynchronous motor energy, you can calculate the power consumed by the frequency Converter from the network in a wide range of loads that can be used in the design of testing stations for asynchronous traction motors.

The article shows the relevance of applying the method of mutual test load of asynchronous traction motors of railway rolling stock. On the basis of the recommendations of existing standards in testing of asynchronous motors is made up of a sequence of acceptance testing of asynchronous traction motors provided in the form of an algorithm. In line with the scheme proposed for testing procedures on the use of the basic equipment of the circuit. The analysis of the main types of tests, the comparison of the classical means for testing the functionality of the inverters eliminated the need for additional DC sources in determining the resistance of the stator windings, additional brake and step-down transformers during short circuit and experience to carry out simultaneous testing of two induction motors increased speed at the stand of mutual load.