IMPROVEMENT OF THE MODEL OF POWER LOSSES IN THE PULSED CURRENT TRACTION MOTOR IN AN ELECTRIC LOCOMOTIVE

The object of research is a pulsating current traction motor. To improve the accuracy of its mathematical model, it is necessary to use the values of the parameters that are determined in experimental studies of the electric motor. In particular, it is important to use in the model of the electric motor inductance obtained experimentally. A method is proposed for calculating the inductance of the armature winding, main poles, additional poles and compensation winding and the total inductance of the traction motor armature circuit. The calculations are based on the results of the indirect inductance measurement method, in which the electrical values of various modes of power supply of the electric motor windings are directly measured, and the inductances are determined by auxiliary calculations. The inductances of the traction motor armature circuit have a non-linear dependence on the current flowing through them. The main difference of the study is that the measurements of the electrical parameters required for calculating the inductance are carried out over the entire range of operating currents of the windings. The essence of the proposed technique is to measure the active power in the armature winding, the winding of the main and additional poles, and the compensation winding, as well as in the armature circle as a whole when they are supplied with alternating current. According to the obtained values of active power losses and phase displacement, the corresponding reactive power losses are determined, with the help of which the inductances of the motor windings are calculated. Approbation of the methodology for calculating the conduction inductance for an electric motor of a pulsating current NB-418K6 (country of origin Russia), is used on electric locomotives of the VL80T and VL80k series (country of origin Russia). A scheme for measuring electrical parameters necessary for calculating inductance is proposed. The graphical dependences of the inductance on the armature current, built on the basis of calculations, confirmed the hypothesis about the nonlinear dependence of these inductances on the armature current. For further application of the results obtained in the simulation of the operation of the traction electric motor NB-418K6, a polynomial approximation of the total inductance of the armature circuit was performed.

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Analysis of the loading of the gear casing of an electric locomotive provided that the bolts fastening it to traction motor are loosened

Proceedings of Petersburg Transport University ◽

10.20295/1815-588x-2021-2-201-210 ◽

2021 ◽

Vol 2021 (2) ◽

pp. 201-210

Author(s):

Anatoly G. ANDRIEVSKY ◽

◽

Elena A. CHABAN ◽

Vladimir V. MOSKVICHEV ◽

◽

...

Keyword(s):

Static Loading ◽

Software Package ◽

Practical Importance ◽

The Finite Element Method ◽

Electric Locomotive ◽

Traction Motor ◽

Spatial System ◽

Loading Methods ◽

Vertical Bearing ◽

Ansys Workbench

Objective: To study the dependence of the numerical values of the bearing reactions occurring in the bolted fasteners of the gear casing (GC) on the conditions of its fastening to the traction motor. To show the resulting redistribution of the bearing reaction values in the case of the lack of load bearing in one or two bolted fasteners from the three existing design ones. To calculate the equivalent stresses that appear in the gear casing structure under various abnormal conditions of its fastening to the traction motor under static loading. Methods: The equations of statics were used for the spatial system of forces, including three vertical bearing reactions and the weight of the casing itself. To study the stress-strain state of the casing in the case of its static loading, the ﬁnite element method was used, implemented in the ANSYS Workbench software package. Results: The cause of damage to the GC during operation has been found associated with its design ﬂaws. Calculation formulas have been obtained for determining the vertical bearing reactions of the GC. The need to take into account the GC loading in the case of redistribution of loads due to the loosening of its fastening bolts has been found. The need to improve the design of the gear casing has been indicated. Practical importance: The probable cause of damage to the GC during operation has been found. A method is proposed for assessing the GC loading in the case of redistribution of loads between its bearing points.

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Calculation of electric locomotive traction motor bearings life

10.1063/5.0063519 ◽

2021 ◽

Author(s):

A. P. Buynosov ◽

A. V. Smolyaninov ◽

I. A. Dobychin ◽

V. F. Lapshin ◽

Y. A. Mishin

Keyword(s):

Electric Locomotive ◽

Traction Motor

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Model of pulsating current traction motor taking into consideration magnetic losses in steel

Electrical Engineering & Electromechanics ◽

10.20998/2074-272x.2021.6.02 ◽

2021 ◽

pp. 11-17

Author(s):

S. Goolak ◽

Ie. Riabov ◽

V. Tkachenko ◽

S. Sapronova ◽

I. Rubanik

Keyword(s):

Mathematical Model ◽

Magnetic Characteristic ◽

Design Parameters ◽

Magnetic Losses ◽

Electric Locomotive ◽

Traction Motor ◽

Traction Drive ◽

Pulsating Current ◽

Nonlinear Nature ◽

Excitation Winding

The aim of the work is to develop a mathematical model of the traction motor of the pulsating current of an electric locomotive taking into account the magnetic losses in the motor steel to determine the starting parameters depending on the voltage of the armature winding. Methodology. Mathematical modeling of electromagnetic processes in a traction motor of pulsating current is applied taking into account the nonlinear nature of the armature inductance, the inductance of the excitation winding and the nonlinear nature of the universal magnetic characteristic. The magnetic losses in the steel of the traction motor were taken into account by establishing the dependence of these losses on the frequency of reversal, the magnetic flux in the magnetic circuit of the motor and the geometric dimensions of the motor. Results. The mathematical model of calculation of starting parameters of the traction engine of the pulsating current of the traction drive of the electric locomotive of alternating current taking into account the equation of instantaneous value of losses in engine steel is developed. The dynamic characteristics of the traction motor with pulsating current are obtained. It allows to investigate starting parameters of the traction engine on the basis of the received mathematical model and to design elements of the traction drive of the electric locomotive according to the specification, to choose optimum design parameters. Originality. For the first time a comprehensive study of the pulsating current traction motor was carried out taking into account the nonlinear nature of the armature inductance, excitation winding inductance and nonlinear nature of the universal magnetic characteristic and taking into account the magnetic losses in the motor steel. Practical significance. The model of the traction motor of pulsating current taking into account losses in steel of the engine on the basis of the carried-out calculation is developed. Experimental studies have confirmed the adequacy of the model, which allows to apply the obtained model to develop a mathematical model of an AC electric locomotive to study the electrodynamic processes in it at different modes of operation of the electric locomotive.

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Nitrocementation of traction motor gears of the VL10 electric locomotive

Metal Science and Heat Treatment ◽

10.1007/bf00649241 ◽

1970 ◽

Vol 12 (4) ◽

pp. 348-350

Author(s):

N. S. Chelidze ◽

A. V. Voloshina

Keyword(s):

Electric Locomotive ◽

Traction Motor

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Dependence of Power Losses in an Overhead Wiring on the Current Waveform Consumed by an Electric Locomotive

VIII International Scientific Siberian Transport Forum - Advances in Intelligent Systems and Computing ◽

10.1007/978-3-030-37916-2_18 ◽

2020 ◽

pp. 167-176

Author(s):

Iurii Kabalyk

Keyword(s):

Current Waveform ◽

Power Losses ◽

Electric Locomotive

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ENERGY SAVING BY REPLACING UNLOADED ENGINES OF NON-STANDARD EQUIPMENT FOR ROLLING STOCK REPAIR

Municipal economy of cities ◽

10.33042/2522-1809-2021-6-166-33-38 ◽

2021 ◽

Vol 6 (166) ◽

pp. 33-38

Author(s):

O. Marenich ◽

O. Karzova

Keyword(s):

Active Power ◽

Rolling Stock ◽

Power Losses ◽

Electric Locomotive ◽

Standard Equipment ◽

Electric Drives ◽

Technological Processes ◽

Asynchronous Motors ◽

Active Power Losses ◽

Universal Equipment

It is established that at various technological processes at repair of a rolling stock of railways electric drives of the universal non-standard equipment can constantly work in essentially underloaded mode that leads to deterioration of their power indicators. The aim of the work is to quantify the reduction of active power losses when replacing constantly underloaded asynchronous motors of unregulated electric drives of universal non-standard technological equipment used in the repair of railway rolling stock with less powerful ones. In this work, the subject of research are the motors of electric drives of this equipment. The analysis of technological processes at repair of a rolling stock, technical characteristics of the specified equipment is carried out and the conclusion is accepted that first of all it is expedient to investigate efficiency of replacement on the equipment of the established engine on less powerful at carrying out at the specialized enterprises of such technological processes warehouse (wheel pairs, traction motors, auxiliary electric machines, frames of rolling stock carts, etc.). The load of the electric motors of transport trolleys of equipment is proposed to be defined as the ratio of the weight of a large unit of electric locomotive, diesel locomotive, electric train and other types of rolling stock to the carrying capacity of universal non-standard equipment of transport trolley. The term "universal" equipment is introduced in the work, which means equipment for performing a certain technological process in the repair of various large units of different types of rolling stock, as well as "specialized enterprise" specializing in the repair of rolling stock, large units which weigh significantly less, than the load-lifting capacity of the transport cart of the equipment. Therefore, the motors of electric drives of universal equipment at these enterprises are constantly operating underloaded. Also actions for quantitative assessment and reduction of active power losses in the electric drive motor are offered.

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