The Determination of the Asynchronous Traction Motor Characteristics of Locomotive

Pavel Grigorievich Kolpakhchyan,Alexander Evgenievich Kochin,Alexey Rifkatovich Shaikhiev,Andrey Valerievich Sukhanov,Jan Otypka,Konstantin Stepanovich Perfiliev

doi:10.15598/aeee.v15i2.1926

Pavel Grigorievich Kolpakhchyan, Alexander Evgenievich Kochin + Show 4 more

Open Access

https://doi.org/10.15598/aeee.v15i2.1926

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Abstract

The article deals with the problem of the locomotive asynchronous traction motor control with the AC diesel-electric transmission. The limitations of the torque of the traction motor when powered by the inverter are determined. The recommendations to improve the use of asynchronous traction motor of locomotives with the AC diesel-electric transmission are given.

Highlights

- leakage inductance and the total inductance of the stator; Lσr, Lr = Lm + Lσr - leakage inductance and the total inductance of the rotor, referred to the stator; Rs - stator resistance. In these modes the regulation of asynchronous traction motor should be carried out at a constant voltage and a constant current of the stator, which corresponds to the implementation of the law of the constancy of the full power supplied to the stator
In the first one the torque of asynchronous traction motor is limited by clutch conditions
It is necessary to the stability margin, as the maximum engine rotation speed is much higher than the rotation speed of the continuous mode

Summary

The Problem Statement

The update of the locomotive fleet, including the fleet of freight locomotives is carried on the railways of the Russian Federation. One of the most promising locomotives is a new freight locomotive with asynchronous traction motor 2TE25A [1], [2] and [3] It has the diesel generator set of 2500 kW capacity in each six-axle section. The voltage on the DC link (at the inverter input) is not constant and depends on the speed of the diesel generator, which varies over a wide range. The torque limit mode is possible up to a speed at which the output voltage of the inverter becomes maximum possible with the used modulation method. The limitation of inverter voltage does not allow regulation at constant flux linkage and requires the use of field weakening. The stator voltage remains constant and equal to its maximum value, which the inverter limits. According to the theory of electrical machines, the traction motor operation takes place in two zones: in a constant field zone and in a weak field zone

The Mathematical Description of Processes in an Asynchronous Traction Motor

Characteristics of the AC Traction Motors

Conclusion