Journal articles: 'Asynchronous traction motor'

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Liudvinavičius, Lionginas, Leonas Povilas Lingaitis, Stasys Dailydka, and Virgilijus Jastremskas. "THE ASPECT OF VECTOR CONTROL USING THE ASYNCHRONOUS TRACTION MOTOR IN LOCOMOTIVES." TRANSPORT 24, no. 4 (December 31, 2009): 318–24. http://dx.doi.org/10.3846/1648-4142.2009.24.318-324.

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The article examines curves controlling asynchronous traction motors increasingly used in locomotive electric drives the main task of which is to create a tractive effort‐speed curve of an ideal locomotive Fk = f(v), including a hyperbolic area the curve of which will create conditions showing that energy created by the diesel engine of diesel locomotives (electric locomotives and in case of electric trains, electricity taken from the contact network) over the entire range of locomotive speed is turned into efficient work. Mechanical power on wheel sets is constant Pk = Fkv = const, the power of the diesel engine is fully used over the entire range of locomotive speed. Tractive effort‐speed curve Fk(v) shows the dependency of locomotive traction power Fk on movement speed v. The article presents theoretical and practical aspects relevant to creating the structure of locomotive electric drive and selecting optimal control that is especially relevant to creating the structure of locomotive electric drive using ATM (asynchronous traction motor) that gains special popularity in traction rolling stock replacing DC traction motors having low reliability. __e frequency modes of asynchronous motor speed regulation are examined. To control ATM, the authors suggest the method of vector control presenting the structural schemes of a locomotive with ATM and control algorithm.

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Kuznetsov, Valeriy, Ewa Kardas-Cinal, Piotr Gołębiowski, Borys Liubarskyi, Magomedemin Gasanov, Ievgen Riabov, Lilia Kondratieva, and Michał Opala. "Method of Selecting Energy-Efficient Parameters of an Electric Asynchronous Traction Motor for Diesel Shunting Locomotives—Case Study on the Example of a Locomotive Series ChME3 (ЧMЭ3, ČME3, ČKD S200)." Energies 15, no. 1 (January 3, 2022): 317. http://dx.doi.org/10.3390/en15010317.

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One of the assumptions made during the modernization process of diesel shunting locomotives is the replacement of a diesel traction motor with a DC generator with an electric asynchronous traction motor. The article aimed to develop a method of selecting energy-efficient parameters of an asynchronous electric traction motor for diesel shunting locomotives, which will ensure that its operating energy efficiency will be as high as possible. The method was verified on the example of a locomotive series ChME3 (ЧMЭ3, ČME3, ČKD S200). It has been found that using a traction asynchronous electric drive on a ChME3 locomotive, its efficiency increases in comparison with DC electric motors by 3–5% under the long-term operation modes and by 7–10% during locomotive operation with traction at the adhesion limit. Using a new traction gearbox with a higher gear ratio expands the speed range in which the asynchronous traction drive operates with a high-efficiency factor. It is effective to use a traction asynchronous electric drive to modernize ChME3 diesel locomotives in case of their use under the modes requiring the implementation of maximum traction forces at low speeds. A further increase in the efficiency of the traction asynchronous electric drive is possible based on the optimal design of the wheel-motor unit and the asynchronous traction electric drive.

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Nguyen Quang Thieu and V. V. Markov. "Rational control laws asynchronous electric traction." Izvestiya MGTU MAMI 5, no. 1 (January 10, 2011): 70–76. http://dx.doi.org/10.17816/2074-0530-69863.

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The paper considers the optimal control laws for asynchronous traction electric motors to minimize various types of losses, minimize consumption of active and reactive power, maximum overload capacity. The authors established that the joint management of the maximum torque and minimum total losses in the motor is most efficient traction control law for asynchronous traction electric motors.

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DOROFEEV, O. V., V. I. VOROBYEV, M. I. BORZENKOV, O. V. IZMEROV, and S. N. ZLOBIN. "TRACTION DRIVE OF LOCOMOTIVES WITH HIGH MOMENTUM COLLECTOR TRACTION ELECTRIC MOTOR." Fundamental and Applied Problems of Engineering and Technology 2 (2021): 118–29. http://dx.doi.org/10.33979/2073-7408-2021-346-2-118-129.

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The issues of development of traction drives of locomotives are considered. It was found that with the existing limitations of the traction force and the speed of continuous operation, asynchronous traction motors do not have clear advantages over collector motors. The possibility of creating collector motors for electric locomotives with a power equal to the used asynchronous ones has been proved, new technical solutions have been proposed for units that ensure the reliability of the latter when using high-torque motors (elastic gearwheel with chevron teeth, two-layer rubber-metal hinge, rubber-cord clutch options), as an optimal solution for the drive with collector motors, it is proposed to use a drive with a support frame motor and an axial gearbox. The directions of research necessary for the practical implementation of drives with a high-torque traction motor are determined, it is proposed to conduct research on the feasibility of creating diesel locomotives with bogies, unified with electric locomotives. The proposed solutions received two patents for inventions, eight patents for utility models, two patent applications were filed.

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Ovsyannikov, E. M., B. A. Ivobotenko, V. M. Yurkevich, and E. M. Koshelyev. "Direct torque control of asynchronous traction motor." Izvestiya MGTU MAMI 7, no. 2-1 (January 20, 2013): 188–94. http://dx.doi.org/10.17816/2074-0530-68300.

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This paper proposes a new system of direct torque control of asynchronous traction motor with space vector modulation of voltage supply. The results of the simulation of traction asynchronous traction motor show advantages of the developed control system: simplicity of implementation, high dynamic performance and small fluctuations of the electromagnetic torque.

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Goolak, Sergey, Viktor Tkachenko, Pavol Šťastniak, Svitlana Sapronova, and Borys Liubarskyi. "Analysis of Control Methods for the Traction Drive of an Alternating Current Electric Locomotive." Symmetry 14, no. 1 (January 13, 2022): 150. http://dx.doi.org/10.3390/sym14010150.

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The analysis of operating conditions of traction drives of electric locomotives with asynchronous traction motors has been carried out. It was found that during operation in the output converter of an asynchronous motor, defects may occur, which leads to asymmetric modes of its operation. Models of a traction drive of an electric locomotive with asynchronous motors with scalar and vector control of the output converter are proposed, taking into account asymmetric operating modes. As a result of the simulation, the starting characteristics of the traction drive were obtained for various control methods both in normal and emergency modes of the drive. For the drive-in emergency mode, the following cases were investigated: the balance of the converter output voltages and the turn-to-turn circuit of 10% of phase A winding of the motor stator; imbalance of the output voltages of the inverter and an intact motor; imbalance of the output voltages of the converter and interturn short circuit of 10% of phase A winding of the motor stator. Comparison of the simulation results have shown that in emergency modes in the traction drive, the torque ripple on the motor shaft in the drive with vector control is 13% less, and in scalar control, the phase current unbalance coefficient is 22% less. The results of this work can be used to study the influence of the output converter control methods on the energy efficiency indicators of the traction drive of an AC electric locomotive.

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Sulym, A. "A METHODOLOGY TO SELECT ASYNCHRONOUS TRACTION ELECTRIC DRIVE FOR INNOVATIVE METRO ROLLING STOCK." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" 1, no. 37 (June 29, 2021): 97–118. http://dx.doi.org/10.32703/2617-9040-2021-37-11.

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The paper deals with the justification of the need to use an asynchronous traction electric drive on the metro rolling stock. The advantages of using an asynchronous traction electric drive in comparison with a DC commutator motor drive are formulated. The characteristics of modern innovative metro rolling stock with asynchronous traction electric drive of domestic and foreign production are analyzed. Aspects of the choice of a variable frequency asynchronous traction electric drive for innovative rolling stock are formulated and the existing typical algorithm of such choice is given. The main reasons for the irrational choice of traction asynchronous electric drive for the metro rolling stock are considered and the consequences of such a choice are analyzed. It is proposed to improve the methodology for selecting a variable frequency traction asynchronous electric drive for the metro rolling stock in terms of such an important operational factor as the specific cost of electrical energy for traction. The rational parameters of the variable frequency asynchronous traction electric drive according to the proposed procedure for the specified characteristics of the metro rolling stock are specified. The reserves of energy savings for the given conditions due to the introduction of an asynchronous traction electric drive with rational parameters on the innovative rolling stock are determined. It is established that the efficiency factor of the asynchronous traction motor significantly affects the specific electric energy consumption for the metro rolling stock traction and operating costs.

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Fedotov, Ilya, and Vyacheslav Tikhonov. "Simulation of Traction Electric Drive with Vector Systems of Direct Torque Control." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 2 (August 8, 2015): 106. http://dx.doi.org/10.17770/etr2013vol2.846.

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The article deals with investigation of electromechanical and energetic characteristics of traction electric drive with vector systems of direct torque control. As a controlled object the traction asynchronous motor ДТА-1У1, which is used to drive the trolley-bus is considered. At the present time the usage of traction asynchronous electric drives for town transport is relevant. Due to development of power electronic devices and microprocessor-based control systems it became possible to replace DC electric drives with electric drives with asynchronous motors. The article contains brief description of two different types of control systems: field-oriented control (FOC) and direct torque control (DTC). Principles of work for both systems are considered and the main advantages and disadvantages associated with the use of these systems are pointed out. The models of both systems for traction asynchronous electric drive, built in modeling environment MATLAB/Simulink, are given in this article for further comparative analysis. As the main quality factor of control total harmonic distortion (THD) is used.

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Titova, T. S., A. M. Evstaf’ev, and A. A. Pugachev. "Vector control system of electric traction drive with power losses minimization." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042090. http://dx.doi.org/10.1088/1742-6596/2131/4/042090.

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Abstract Based on the operating conditions analysis of electric traction drives of locomotives, it has been established that the vector control systems for an asynchronous motor fully satisfy all the requirements. On the basis of a T-shaped equivalent circuit, a mathematical model of an induction motor is presented, taking into account losses in the stator steel, the effect of the rotor current and saturation displacement. An algorithm for the formation of the optimal, from the point of view of power losses, task for the rotor flux linkage when using a vector control system with the orientation of the axes of the coordinate system along the rotor magnetic field, is developed. The limiting factors are the limitations on the current and voltage of the motor stator, the diesel generator set power. A shared control system for an electric traction drive with asynchronous motors has been developed, which provides direct control of wheel slip with a subordinate vector control system that minimizes power losses. The results of modeling in a steady-state operation and a start-up mode for an electric traction drive of a two-axle bogie with axial support and 630 kW asynchronous motors with the use of various options for organizing circuit reentrances are presented.

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Riabov, I., S. Sapronova, V. Tkachenko, S. Goolak, and R. Keršys. "CALCULATION OF TRACTION AND ENERGY CHARACTERISTICS ELECTRIC ROLLING STOCK WITH ASYNCHRONOUS TRACTION ELECTRIC DRIVE." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" 1, no. 38 (December 24, 2021): 141–52. http://dx.doi.org/10.32703/2617-9040-2021-38-138-13.

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The issue of determining the traction and energy characteristics of electric rolling stock with asynchronous traction drive is considered. It is noted that such rolling stock can work at any point of the traction area, resulting in the need to determine the characteristics of the rolling stock for the entire traction area. The calculation of the characteristics of the traction induction motor, which are the basis for determining the traction and energy characteristics of the electric rolling stock, is considered in detail. A procedure based on the calculation of the replacement circuit of an induction motor is proposed. The calculation of power losses due to higher harmonic voltages and currents is considered. An example of calculation of traction and energy characteristics of an DC electric shunting locomotive with a traction asynchronous electric drive is given.

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Lingaitis, Leonas Povilas, and Lionginas Liudvinavičius. "ELECTRIC DRIVES OF TRACTION ROLLING STOCKS WITH AC MOTORS." TRANSPORT 21, no. 3 (September 30, 2006): 223–29. http://dx.doi.org/10.3846/16484142.2006.9638070.

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The paper considers the variation of circuit design of the electric drives in traction rolling stocks when traditional DC electric machines are replaced with AC electric machines. Simplified circuit diagrams of the electric drives using electric machines of non‐commutator type are offered. Operational defects of DC traction engines are weighed against some positive characteristics of direct current series excitation in traction engines, determining their extensive use in the electric drives of traction rolling stocks. However, the rapid development of semiconductor devices, e.g. thyristors and IGBT transistors, led to the creation of a great variety of semiconductor inverters. This made it possible to develop an autonomous three‐phase power supply system for diesel locomotives and algorithms for the AC traction motors and to obtain engine characteristics matching the tractive force by using voltage frequency and current inverters. A mathematical justification of the engine torque and tractive force control as well as its particular characteristics is provided. The graphs demonstrating the particular ways of changing the electrical parameters of an asynchronous motor with a squirrel‐cage rotor are also presented.

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Kulinich, Yu M., S. A. Shukharev, and A. V. Gulyaev. "Increasing the energy efficiency of auxiliary machines of AC electric locomotive." VNIIZHT Scientific Journal 80, no. 5 (October 26, 2021): 276–84. http://dx.doi.org/10.21780/2223-9731-2021-80-5-276-284.

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Currently, an asynchronous variable frequency drive based on semiconductor converters is widely used due to the relative simplicity and reliability of the design. The use of digital microprocessor systems ensures high accuracy and flexibility of drive control. On the domestic rolling stock, the widespread introduction of asynchronous motors began to replace DC traction motors with sequential excitation. In particular, scalar-controlled asynchronous motors are used on serially produced 2TE25A diesel locomotives and EP20 electric locomotives. The auxiliary asynchronous machines of these locomotives are controlled by the vector control method. The use of a new type of engine on the rolling stock makes it possible to achieve a significant increase in the quality of consumed energy and reduce the consumption of electricity for traction of trains. Ensuring the energy efficiency of the drive in a wide range of loads requires further research. In this regard, the issue of saving energy resources becomes very urgent. The article proposes a vector control scheme for asynchronous motors of auxiliary machines of an electric locomotive, which implements an extreme method of control according to the criterion of minimizing the consumed current. The analysis of the engine operation is carried out based on its mathematical model in a rotating coordinate system d — q, which is implemented in the MatLab/Simulink software package. As a result of simulation modeling, it was found that the extreme control system with a variable step allows for each fixed value of the electromagnetic moment of the motor in the minimum time to find the optimal (extreme) value of the magnetic flux of the motor rotor, which corresponds to the minimum value of the stator current. The developed model of the motor with vector control is supplemented with an extreme regulator device, which allows achieving the best energy performance of the motor and reducing electrical losses in all operating modes with a minimum search time. The presented research results can be used in the development of energy-saving control systems for an asynchronous motor.

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Goolak, Sergey, Viktor Tkachenko, Svitlana Sapronova, Vaidas Lukoševičius, Robertas Keršys, Rolandas Makaras, Artūras Keršys, and Borys Liubarskyi. "Synthesis of the Current Controller of the Vector Control System for Asynchronous Traction Drive of Electric Locomotives." Energies 15, no. 7 (March 24, 2022): 2374. http://dx.doi.org/10.3390/en15072374.

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This paper deals with the analysis of the operating conditions of traction drives of the electric locomotives with asynchronous traction motors. The process of change of the catenary system voltage was found to have a stochastic character. The method of current controller synthesis based on the Wiener–Hopf equation was proposed to enable efficient performance of the traction drive control system under the condition of the stochastic nature of the catenary system voltage and the presence of interferences, when measuring the stator current values of the tractor motor. Performance simulation of the proposed current controller and the current controller used in the existing vector control systems of the traction drives used in the electric locomotives was implemented. The results of the performance simulation of the proposed current controller were compared with the performance of the current controller in existing vector control systems of the traction drives. The results are applicable to the design of vector control systems of traction drives in electric locomotives and to the study of the influence of performance of electric traction drives in electric locomotives on the quality indicators of the power supplied by the traction power supply system under the actual operating conditions of the locomotive.

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Yang, Ye Song, Guang Sheng Ren, and Xiao Qing Yin. "Measurement and Control System for Traction Motor Based on OPC Technology." Advanced Materials Research 542-543 (June 2012): 208–11. http://dx.doi.org/10.4028/www.scientific.net/amr.542-543.208.

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The paper analyzes the working principle and the advantages and disadvantages of synchronous access and asynchronous access in OPC standard. Take the traction motor performance test and control system as example. It used Visual Basic development OPC client and used PC Access as an OPC Server. The performance test bed for traction motor realize the measurement and control system efficient, stable and reliable operation. According to the characteristics of different parameters, the system chooses the methods of Subscription and Synchronous Write which used the advantages of synchronous access and asynchronous access.

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Khamidov, O. R., and A. V. Grishchenko. "Locomotive asynchronous traction motor rolling bearing fault detection based on current intelligent methods." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042084. http://dx.doi.org/10.1088/1742-6596/2131/4/042084.

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Abstract The paper is devoted to current issues of locomotive asynchronous traction motor (ATEM) fault detection using neural networks. Developed sophisticated intelligent methods for monitoring and inspecting the technical condition of ATE bearings. Current absorption spectra are analysed to assess the technical condition of the induction bearing units. The mechanical vibration frequencies of a squirrel cage induction motor are presented. The method of artificial neural networks which are universal approximators and can effectively and efficiently solve problems of monitoring and diagnostics of technical condition of locomotive induction traction motors is applied. A neural network model and framework for monitoring the technical condition of ATED bearings has been developed. They are based on rules and user-provided facts to recognise the situation, make a diagnosis, formulate a solution or make a recommendation. The main failures of the bearing units of squirrel cage ATED are analysed. A methodology has been developed to build a neural network model of the ATED. The structure and architecture of the artificial neural network is defined. An experimental research has been conducted. The results enable the determination of bearing faults in asynchronous traction motors with squirrel cage rotor.

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Zong, Jian, Ping Qian, and Xue Feng Ding. "Study of Electrical Traction Locomotive Control System Based on Feed-Forward Decoupling Strategy." Advanced Materials Research 516-517 (May 2012): 1935–38. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.1935.

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An asynchronous motor is widely used in traction locomotive system now, AC induction motor is nonlinear, strongly coupled and multivariable system, so it is very difficult to control as a linear system. For this, VVVF(Variable Voltage Variable Frequency) control method adopt in some running traction locomotives, that can reduce over-current with load starting and should be compensated at low frequency. Based on study the Control strategies of locomotives, vector control adopt in most electrical traction locomotive. According to the drawing performance requirements of electrical traction motor, feed-forward decoupling method adopted. Simulation and experiment proved this method can meet the traction locomotive control requirements.

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Pugachev, Alexander, and Galina Fedyaeva. "Definition of the Transfer Function Parameters of Asynchronous Motor as an Object of Temperature Control." Applied Mechanics and Materials 698 (December 2014): 124–30. http://dx.doi.org/10.4028/www.scientific.net/amm.698.124.

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The analysis and systematization of research methods of thermal state of induction motors including traction ones is done. It is shown that for each type of motor it is necessary to develop its own mathematical model of thermal processes, and its verification should be carried out only on the basis of experimental investigations. The structure and operating principles of the complex developed physical model of the traction electric drive with induction motors is represented. The motors have a cooling system with variable-speed electric fan and subsystem of measurement and recording of monitored parameters. The method and the results of experimental study of the processes of heating and cooling of the induction motor are illustrated. Transfer functions and approximation curves of transients are proposed, their parameters are defined.

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Sekara, Nagamani Chandra, Somanatham R, and Chaitanya Kumar U. "Design and Analysis of Drive System with Slip Ring Induction Motor for Electric Traction in India." International Journal of Power Electronics and Drive Systems (IJPEDS) 5, no. 3 (February 1, 2015): 374. http://dx.doi.org/10.11591/ijpeds.v5.i3.pp374-382.

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The use of Squirrel Cage for Traction has revolutionised the motive power of a Locomotive. The Asynchronous Motor is rugged with high starting Torque, has a very smooth Voltage and Speed control as compared to a DC Series Motor. When looking at the Traction perspective, a Slip Ring Induction Motor can be an alternative to the Squirrel Cage Motor as it has higher starting Torque and better efficiency than a Squirrel Cage Motor. the Slip Power Recovery scheme also plays a proactive role as ther can be substantial savings of energy in case of a Slip Ring Induction Motor. A detailed design and analysis of a Drive System with Slip Ring Induction Motor for Electric Traction is presented in this Research Paper

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Chen, Si, Fang Wang, and Jun Ci Cao. "Modal Analysis on Rotor of Asynchronous Traction Motor Used in High-Speed Trains." Applied Mechanics and Materials 274 (January 2013): 374–77. http://dx.doi.org/10.4028/www.scientific.net/amm.274.374.

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According to the suffered various impacts and vibrations of traction driving part in high-speed train under complex operating environments and conditions, the modal problems in the rotor of traction motor, power output device in traction transmission system, working in high-speed trains is investigated. In this paper, a Finite Element Analysis model for rotor modal simulation research is established, by using which the influences of structure parts on motor natural frequency is analyzed. From the simulation analysis, the natural frequencies, the vibration mode and the amplitude of each order modes are obtained, which could provide a theoretical basis for the rapid, stable and safety operation of high-speed trains.

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Ovsyannikov, E. M., and Thieu Nguyen Quang. "Synthesis of Direct Torque Control System of Asynchronous Traction Electric Drives." Izvestiya MGTU MAMI 5, no. 2 (January 20, 2011): 41–46. http://dx.doi.org/10.17816/2074-0530-69839.

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The paper proposes a method for the synthesis of a direct torque control of asynchronous electric drives with separate control of the magnetic flow and electromagnetic torque. The authors show the results of simulation of asynchronous electric drive, advantages of the developed motor control system: ease of construction, high dynamic quality, small fluctuations of electromagnetic torque.

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Grishchenko, A. V., and M. A. Shrajber. "Simulation of thermal processes in asynchronous traction electric motor of a locomotive." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042088. http://dx.doi.org/10.1088/1742-6596/2131/4/042088.

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Abstract This article analyzes the problem of increasing the reliability of AC traction electric machines installed on traction rolling stock. In the course of the study, a finite element model of thermal processes was built, and the thermal state of an asynchronous traction motor (ATED) of a diesel locomotive was studied in the Solid Works program. The basic method for studying thermal processes in ATED was the finite element method (FEM), as well as the basic equations of heat transfer and the theory of heating a multicomponent solid. The constructed finite element model of the ATED rotor of a diesel locomotive makes it possible to determine the dependence of the temperature values of the rotor elements on the current flowing through them. The obtained values of the temperature distribution of the ATED squirrel-cage rotor are recommended to be taken into account in the design, manufacture and testing of AC electric machines of diesel locomotives.

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Kosmodamianskii, A. S., V. I. Vorobiev, and A. A. Pugachev. "The temperature effect on the performance of a traction asynchronous motor." Russian Electrical Engineering 82, no. 8 (August 2011): 445–48. http://dx.doi.org/10.3103/s1068371211080074.

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Kiselev, I. G., D. N. Kurilkin, and M. A. Shreiber. "Thermal model of an asynchronous traction motor of a diesel locomotive." Proceedings of Petersburg Transport University 2021, no. 4 (December 2021): 460–68. http://dx.doi.org/10.20295/1815-588x-2021-4-460-468.

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Objective: Evaluation of the temperature regime of the windings of an asynchronous traction electric motor with a squirrel-cage rotor (ATED) of the DAT-350 type of a 2TE25A diesel locomotive using the de- Современные технологии – транспорту 467 ISSN 1815-588Х. Известия ПГУПС 2021/4 veloped thermal model. Methods: The research was carried out by the fi nite element method in the application for calculating steady-state temperature fi elds SolidWorks. Resuls: To ensure the specifi ed service life of the ATED, the temperature rise of the windings must be limited to safe values, based on the insulation class. Therefore, it is crucial that designers and operators have access to accurate and computati onally effi cient, physics-based ATED thermal behavior modeling tools. Practical results: Using the proposed methods, it is possible to accurately and effectively evaluate the thermal characteristics of ATED of promising diesel locomotives. In addition, designers can easily and quickly adjust the parameters and performance characteristics of the ATED in such a way that they are conducive to improving the overall performance of the locomotive.

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STASENKO, Igor S., Nikita V. HERASIMENKO, and Viktor S. SAVITSKI. "METHODOLOGY FOR DESIGNING A TRACTION MOTOR FOR TRANSPORT." Mechanics of Machines, Mechanisms and Materials 1, no. 58 (March 2022): 24–30. http://dx.doi.org/10.46864/1995-0470-2022-1-58-24-30.

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The article is devoted to the design of an asynchronous traction motor intended for work as part of an electric drive of vehicles: electric vehicles, electric buses, trams, trolley buses. The object of the study is a medium-sized bus. The required traction characteristics of the electric motor are constructed, the nominal and limiting characteristics of the increased torque. The dynamic characteristics have been built for a bus with a mechanical transmission and a diesel engine, as well as for a bus with an electric motor. A method is proposed for designing an electric motor based on mathematical modelling of its operation in the software complexes ANSYS RMxprt and INFOLYTICA MAGNET. According to this technique, the main parameters of the electric motor are determined. The results of modelling are given, graphs of the criteria dependence on the electric motor parameters. Experimental studies of the electric motor have been carried out. The results of mathematical modelling are compared with experimental ones. It was found that the discrepancy between the results of experimental and theoretical studies is no more than 5 %.

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Бондаренко, Денис, and Denis Bondarenko. "Complete systems for study of automatic cooling systems and asynchronous traction motors." Bulletin of Bryansk state technical university 2015, no. 2 (June 30, 2015): 22–25. http://dx.doi.org/10.12737/22852.

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A comprehensive system for the study of automatic temperature control system, which allows reducing the level of alternating thermomechanical loads on the windings of asynchronous trac-tion motor, increasing their reliability and durability.

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Bizhaev, A. V. "Research of Tractor Power Unit with Electric Drive Parameters." Agricultural Machinery and Technologies 14, no. 4 (December 18, 2020): 33–42. http://dx.doi.org/10.22314/2073-7599-2020-14-4-33-42.

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The author showed that it was possible to reduce the exhaust gases toxicity and increase tractors effi ciency using an electric power unit to implement traction. The effi ciency of modern electric motors was at its peak of 96 percent, compared to 45 for a diesel engine. He emphasized that this parameter for modern sources of electrical energy was 85-90 percent, which opened up opportunities for the implementation of an electric tractor.(Research purpose) To present the general concept of an electric drive power unit for a tractor of a small traction class and to evaluate its parameters as a fi rst approximation.(Materials and methods) For the tractor’s electric drive lithium-ion batteries were chosen as a source of electrical energy, showing the best characteristics of energy intensity – 432-864 kilojoule per kilogram with a unit cost of 4200-17400 rubles per kilogram. During the analyses of the power unit drive types, a D-120 diesel engine with a power of 20 kilowatt, a DC electric motor and an asynchronous motor with similar parameters were studied. The VTZ-2032 tractor with a nominal tractive eff ort of 600 Newtons when working on stubble was taken as the basis for the calculation.(Results and discussion) The author determined the best indicators of the electric drive by the power characteristics fullness in the gears with a decrease in unit costs per kWh from 24 to 15-16 rubles.(Conclusions) The most effi cient engine was determined – a brushless DC electric motor. The author calculated that the specifi c cost of its energy was 1.5-1.8 times less than that of a diesel engine, and amounted to 15-27 rubles per kilowatt-hour with a maximum effi ciency of 95 percent. It was found that lithium-ion batteries would be the optimal solution for powering the electric drive. They were distinguished by a high specifi c energy consumption – 432-864 kilojoule per kilogram – and a low price per energy unit, amounting to 5-45 rubles per kilojoule.

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Elbachir, Kouadria Mohamed, and Azaiz Ahmed. "Artificial Neural Networks Direct Torque Control of Single Inverter Feed Two Induction Motors." Journal Européen des Systèmes Automatisés 54, no. 6 (December 29, 2021): 881–89. http://dx.doi.org/10.18280/jesa.540610.

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Nowadays the multi-inverter multi-machine conventional system takes a great interest of industrials like railway traction. The implementation of single inverter to dual motor makes all the system cheaper; soft operation, more robust and reliable; This paper is one of control methods proposed in the literature to improve performance of this system, a master slave and average control based in artificial neural networks direct torque control of bi asynchronous motors supplied by single three level inverter NPC is discussed. The result of theoretical analysis is tested with MATLAB SIMULINK environment. And through that, the possibility of DTC single inverter multi-motor system has been verified.

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Zheng, Yu, Changxiu Yang, Tiefeng Peng, and Liujian Zhang. "Vector Control and Modeling of Modular Multilevel High Voltage Converter for Rail Vehicle Traction." International Journal of Circuits, Systems and Signal Processing 16 (January 14, 2022): 517–24. http://dx.doi.org/10.46300/9106.2022.16.64.

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Rail transit plays an important role in the social and economic life of China and even all countries in the world, especially some populous countries or regions. The traction drive system of rail vehicle provides three-phase AC with adjustable voltage and frequency for the traction motor, controls the speed and torque of the traction motor, and then controls the operation of the vehicle. The modular multilevel converter has the advantages of low harmonic, good power quality of output waveform, high reliability, no input filtering and power compensation, and is suitable in the field of frequency conversion. In this work, the open-loop scalar control and vector closed-loop control of modular multi-level high-voltage inverter were adopted. It was found that driven by modular multi-level variable frequency vector control system, asynchronous motor not only has less harmonic content of voltage and current waveform, but also its speed regulation characteristics have been improved.

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Li, Weili, Junci Cao, Dong Li, and Zhigang Wu. "Study on Heat Exchange of Different Ventilation Structures of Asynchronous Traction Motor for High Speed EMU." Transportation Systems and Technology 5, no. 2 (July 19, 2019): 16–30. http://dx.doi.org/10.17816/transsyst20195216-30.

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Background: Aiming at the problems of high local temperature and uneven temperature distribution in asynchronous traction motor of high-speed Electric Multiple Unit (EMU) when it is running. Aim: In this paper, the influence of ventilation system with different structure on temperature distribution is studied. Methods: Taking 600kW asynchronous traction motor as an example, the electromagnetic-fluid-temperature analysis model of the traction motor is established, and the temperature values of different positions in the motor are obtained. The accuracy of the calculation results is verified by comparing with the actual measurement. On this basis, by adjusting the structure of stator and rotor axial ventilation holes, the relationship between temperature distribution and fluid flow state in motor is studied. In addition, the influence of fluid incidence angle on fluid velocity and heat dissipation performance of motor is also studied, and the ventilation structure scheme with relative balance of axial and circumferential temperature in motor is found out, which provides a reference strategy for the design of temperature rise of motor with forced ventilation structure. Results: The wind speed near the intake side of stator teeth and rotor teeth groove is less than that far from the intake side. The flow distribution trend of rotor vent is similar to that of stator vent, but the air in the groove is affected by centrifugal force of rotor rotation, which makes the wind speed difference on the intake side larger than that on the outlet side. The stator winding and rotor guide bar are affected by wind temperature to reach the maximum temperature at the end of the outlet respectively. The stator core is higher at the windward side and the leeward side than the other parts of the motor. The heat dissipation effect at both ends is good. The highest temperature of the stator core appears near the leeward side.

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Kochkar, Timofey, and Aleksandr Maznev. "Neural networks within the systems of converter control of electric rolling stock." Bulletin of scientific research results, no. 1 (March 20, 2016): 57–66. http://dx.doi.org/10.20295/2223-9987-2016-1-57-66.

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Objective: To improve the performance and accuracy of the system of voltage and frequency control for asynchronous traction motor (ATD) of rolling stock. Methods: To estimate the influence of artificial neural networks (INS) implementation to ATD control systems on the control indexes the comparison method was used. Results: The paper examines the possibility of INS implementation within the systems of direct control of traction electric motor moment. It also suggests a method of INS implementation as a ATD flow monitor. It provides the options of implementation and indicates the features of monitor structure design. Practical importance: Integration of the method of direct moment control and using of neural network technologies allows to improve the structure of converters and to improve the accuracy and the performance of output parameters, that, in its turn, decreases the power consumption, as well as losses in traction converters.

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Dmitrieva, V. V., P. E. Sizin, and A. A. Sobyanin. "Application of the soft starter for the asynchronous motor of the belt conveyor." IOP Conference Series: Earth and Environmental Science 942, no. 1 (November 1, 2021): 012003. http://dx.doi.org/10.1088/1755-1315/942/1/012003.

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Abstract The purpose of the work is to justify the need for a smooth start of the conveyor belt. Based on the technological features of the transportation process, the direct start of the conveyor with a loaded undercarriage entails an increase in inertial forces, overload of the traction chains and the drive. Due to the increased starting torque, there is a danger of slipping, the occurrence of an oscillatory transient of the escaping branch of the tape, slipping between the tape and the drive drum. This leads to significant wear of the tape and breakdowns of other equipment, which requires high repair costs. With a smooth start of the conveyor, the acceleration lasts longer, but the movement of the concentrated masses of the belt is more consistent, less oscillatory, which indicates less dynamic forces in the belt. Also, with a smooth start, energy losses in the engine and its heating are reduced. The main results of the work - the transients in the currents of the stator and rotor, in the speed of rotation of the motor and in the speed of movement of the conveyor belt were obtained. The developed model allows us to investigate the dynamic operating modes of the engine and the mechanical part of the conveyor, to analyze the forces arising in the belt during direct and smooth start of the conveyor, to evaluate the slip of the belt and the magnitude of the traction factor. Conclusions - the results of this work should be the basis for controlling the tension in the belt and maintaining the traction factor of the conveyor belt in the start-brake operating modes. In addition, the results obtained can be used in the development of a belt speed control system depending on the amount of random freight traffic entering the conveyor.

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Rodionov, R. V. "Traction and energetic characteristics of a trolley bus drive and the algorithm of a controlling traction asynchronous motor." Russian Electrical Engineering 82, no. 12 (December 2011): 642–46. http://dx.doi.org/10.3103/s106837121112011x.

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Lovati, V., M. Marchesoni, M. Oberti, and P. Segarich. "A microcontroller-based sensorless stator flux-oriented asynchronous motor drive for traction applications." IEEE Transactions on Power Electronics 13, no. 4 (July 1998): 777–85. http://dx.doi.org/10.1109/63.704156.

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Kokourov, D. V., and B. V. Malozyomov. "Algorithm for improving energy efficient wheel motor for electric vehicles." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012049. http://dx.doi.org/10.1088/1742-6596/2061/1/012049.

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Abstract In accordance with the tendency to reduce the number of mechanical assemblies in electric driven machines and mechanisms, attempts are made to bring the electric motor and the actuator of the mechanism into a single whole. Thereby increasing the quality and productivity of the machines. A motor-wheel is a kind of a driving wheel, an actuator of a traction electric drive system of a pneumatic-wheeled transport vehicle. The work is devoted to the modernization of urban electric transport by equipping it with high-energy efficiency motor wheels, based on the frequency converter system - asynchronous motor. This paper describes the improvement algorithm and technological features.

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Пугачев, Александр, Aleksandr Pugachev, Владимир Воробьев, Vladimir Vorobev, Николай Стрекалов, and Nikolay Strekalov. "TEMPERATURE CONTROL OF POWER SEMICONDUCTOR DEVICES OF TRACTION CONVERTER." Bulletin of Bryansk state technical university 2017, no. 1 (March 31, 2017): 200–206. http://dx.doi.org/10.12737/24914.

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The functional and structural circuits of an au-tomatic system for temperature control of power devices of a traction semiconductor converter of frequency are developed. The peculiarities of power devices as an object of temperature control are considered, an equivalent circuit of thermal processes substitution in semiconductor keys is offered, a comparative assessment of capacity of power loss in two- and three-level inverters of voltage is carried out. The dynamic properties of an electro-drive of a cooling fan with an asynchronous motor with a system of scalar control are analyzed. The recommendations on choice and computation of temperature control are developed.

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Panchenko, Vladyslav, and Oleksandr Turenko. "ANALYSIS OF THE INFLUENCE OF VOLTAGE ASYMMETRY ON THE OPERATION OF THE TRACTION ASYNCHRONOUS ELECTRIC MOTOR USING THE SIMULATION MODEL." Collected scientific works of Ukrainian State University of Railway Transport, no. 198 (May 12, 2022): 145–50. http://dx.doi.org/10.18664/1994-7852.198.2021.256648.

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The asymmetry of the supply voltage adversely affects the operation of electricmotors, in particular induction ones. With an uneven load of the phases of the network, the voltagebecomes asymmetric - unequal between the individual phases. Voltage asymmetry leads to the factthat the currents in the phases of the stator winding of the electric motor differ sharply from oneanother. A phase with a high current can overheat above acceptable limits even with a small voltageunbalance. In addition, the active steel of the motor rotor overheats. Overheating of the motorwinding causes an increase in electrical losses, ripples of the electromagnetic torque also appear,and other negative consequences. These factors can lead to process failure, accelerated insulationaging, or even motor failure.In the event of a mains phase failure, running three-phase motors switch to single-phase mode.If the motor load before phase failure was no more than 60% of the rated value, then the motorcontinues to operate with slightly worse energy performance, the rotor speed decreases slightly, thewinding temperature is within acceptable limits. Under heavy loads, the motor winding overheatsexcessively, and in some cases the motor rotor stops and a large current flows through two phases ofthe stator winding. After stopping the engine, it cannot be started even at idle, since a pulsatingmagnetic field is obtained in the engine with a single-phase current.To study the effect of supply voltage asymmetry on the operation of an asynchronous electricmotor, simulation modeling was carried out in the ANSYS Electronics software package for directstart of induction motor with the introduction of a supply voltage asymmetry of one of the phases ata level of 4% in the steady state operation of the electric motor. The characteristics of the rotationfrequency and electromagnetic torque were obtained with asymmetry of the supply voltage and acomparison was made with the symmetrical mode of operation of the electric motor. The results ofsimulation show a slight change in the frequency of rotation of the rotor of the electric motor,however, there are significant ripples of the electromagnetic torque.

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Kulinich, Yu M., S. A. Shukharev, V. K. Dukhovnikov, and A. V. Gulyaev. "Modeling vector control of the asynchronous drive of electric rolling stock auxiliary machines." Russian Railway Science 81, no. 1 (March 29, 2022): 23–30. http://dx.doi.org/10.21780/2223-9731-2022-81-1-23-30.

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Introduction. The development of power semiconductor devices and technology served the basis for fundamentally new types of frequency-controlled electric drives with traction asynchronous motors on the rolling stock of electrified railways. Therefore, problems of theoretical and experimental study of the operating modes of the mentioned drives become actual. This article is a theme continuation of the asynchronous machines control on the AC locomotive, which was presented in no. 5 of Russian Railway Scientific Journal in 2021.Materials and methods. For analysing the frequency converter operation, the authors used mathematical modeling methods, which allowed evaluating the motor operation in various modes without resorting to time-consuming full-scale tests. Recently, software packages for visual programming have been developed, aimed mainly at domestic users, which are not inferior in their capabilities to leading foreign counterparts. Among such software products is SimInTech software for modeling technical systems, developed by 3V Service. The software focuses on solving various applied problems, particularly, on modeling a vector control system for an asynchronous drive.Results. The authors developed a mathematical model of an asynchronous drive of auxiliary machines of an electric locomotive in a rotating coordinate system d – q by the SimInTech application package and concerning the cross-impact influence of d and q control channels.Discussion and conclusion. The developed complex of an asynchronous motor and a vector control system enable to work out various algorithms for improving the energy efficiency of the operation of asynchronous auxiliary machines of an electric locomotive by applying the proposed algorithm for choosing the optimal value of the rotor flux linkage. The presented vector control structure also enables to implement it on the basis of modern microcontrollers, helping to reduce programming time.

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Vorob'ev, Vladimir, Aleksandr Pugachev, Oleg Izmerov, and Evgeniy Nikolaev. "SEARCH FOR RATIONAL EBGINEERING SOLUTIONS OF DIESEL LOCOMOTIVES FOR THE EASTERN RANGE." Bulletin of Bryansk state technical university 2021, no. 10 (October 14, 2021): 53–63. http://dx.doi.org/10.30987/1999-8775-2021-10-53-63.

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The purpose of the study is to search for rational engineering solutions for the main autonomous locomotive for the Eastern range of OAO Russian Railways. Research methods: methods of physical and field experiments, analytical methods for calculating the dynamics of the rolling stock. Research results and novelty: it is established that the use of a four-axle truck of a diesel locomotive TEM7 does not allow to create a locomotive that meets all the requirements of OAO Russian Railways, and the design of truck TEM7 is irrational for mainline locomotives; it is proved that the one-sided arrangement of brake blocks leads to deterioration in the locomotive braking properties. The bearing and axial towline, despite the use of an asynchronous engine, has an unsprung mass 1.5 times greater than that of the previously produced domestic analogue with a collector engine and almost the same mass of the wheel-motor unit; dynamic moments in the drive due to the lack of elastic elements during prolonged operation can reach 56% of the traction torque, which worsens the traction properties of the locomotive. Conclusion: it is advisable to carry out a design study of the drive variant with a support-frame asynchronous traction engine and an axial gearbox, as well as to conduct a technical and economic analysis and design study of a cheaper version of a diesel locomotive with sections on three two-axle bogies, maximally unified with electric locomotives, with a booster tanker module and AC-DC transmission with axial regulation of eight-pole collector motors with support-frame suspension.

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Grishchenko, A. V., and О. R. Khamidov. "Monitoring and diagnostics of the technical condition of the asynchronous traction motor of locomotives using artificial neural networks on the railways of the Republic of Uzbekistan." Proceedings of Petersburg Transport University 17, no. 4 (December 2020): 514–24. http://dx.doi.org/10.20295/1815-588x-2020-4-514-524.

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Objective: Diagnostics of malfunctions of rolling bearings of an asynchronous traction electric motor (ATEM) of locomotives using artifi cial neural networks. Methods: To control and diagnose the technical condition of the ATEM bearing units of locomotives, a hardware-software complex and data analysis methods are used. Results: We investigated the malfunctions of the ATEM rolling bearing of locomotives. The analysis of failures of locomotive bearing units is carried out. Vibration and current signals and the corresponding frequency spectra of an ATEM operating under normal conditions and with various bearing faults are considered. A model for assessing the technical condition of rolling bearings of locomotives has been developed, and the importance of anticipatory diagnostics has been substantiated, which makes it possible to identify defects in advance at the earliest stage of their development. Practical importance: The results of the research can be used in the system for diagnosing the technical condition of rolling bearings of traction electric motors of locomotives in real time.

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Dimitrov, Vasil. "Methodology of testing and optimal setting of an asynchronous traction drive for electric vehicles." MATEC Web of Conferences 234 (2018): 02003. http://dx.doi.org/10.1051/matecconf/201823402003.

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This paper presents a methodology of tests of traction asynchronous drives applied in electric vehicles. It is similar to Urban Driving Cycle ECE-15 (UDC). The objective of the research is to verify the developed methodology through tests performed on a laboratory simulator, which consists of energy-saving asynchronous motor controlled by a frequency inverter (converter). Vector Control on the drive is used for smooth speed regulation over a wide range at high values of efficiency and power factor. Contemporary measuring and control devices and special software products are used for capturing the dynamic characteristics when starting, stopping and changing the speed set point of the drive. Some of tests are presented and an experimental verification of the developed methodology is made. An optimal setting of the drive parameters can be made to minimize the electric energy consumption.

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Fayzullayev, J. S., and K. K. Jurayeva. "The transfer function of a traction asynchronous motor controlled by a four-square converter." IOP Conference Series: Materials Science and Engineering 734 (January 29, 2020): 012195. http://dx.doi.org/10.1088/1757-899x/734/1/012195.

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Es-Saadi, Mouna, Mohamed Khafallah, and Hamid Chaikhy. "Using the Five-Level NPC Inverter to Improve the FOC Control of the Asynchronous Machine." International Journal of Power Electronics and Drive Systems (IJPEDS) 9, no. 4 (December 1, 2018): 1457. http://dx.doi.org/10.11591/ijpeds.v9.i4.pp1457-1466.

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<span lang="EN-US">Many researches have been dedicated to develop the induction motor drive control strategy used on the railway traction applications. In this paper we propose to investigate and to improve the electric locomotives by using a Field Oriented Control (FOC) strategy of induction motor drive. This induction motor can be powered by a five-stage neutral point inverter controlled by sinusoidal pulse width modulation (SPWM) due to good quality for output voltage and The use of fast switches. Both conventional and improved locomotives are simulated in Matlab/Simulink and compared in open loop conditions and closed loop conditions using IP controller, in term of torque response, current harmonic distortions and rotor speed response.</span>

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Idoko, Hillary C., Udochukwu B. Akuru, Rong-Jie Wang, and Olawale Popoola. "Potentials of Brushless Stator-Mounted Machines in Electric Vehicle Drives—A Literature Review." World Electric Vehicle Journal 13, no. 5 (May 20, 2022): 93. http://dx.doi.org/10.3390/wevj13050093.

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Brushless stator-mounted traction motors, which are new and emerging, have many potential applications in the electrified transport industry. Brushless stator-mounted machines (BSSMs), with the so-called flux modulation (FM) effects, use asynchronous field harmonics to realize energy conversion by altering the basic principle for conventional machine design which requires the stator and rotor to have the same pole number. The machines show promise of meeting the challenging requirements of electric vehicle (EV) traction motors. Therefore, in this paper, a review is undertaken on the state-of-the-art and potentials of the BSSMs for EV drives. The focus on BSSMs is due to their suitability for high-speed high torque density performance, as well as possessing suitable heat dissipation and flux weakening capabilities. The study is used to first rehash and discuss the design and excitation topologies, operating principles, and some emerging trends based on the basic BSSM variants, e.g., the doubly salient machine, flux reversal machine, and flux switching machine, while also undertaking a bibliometric synthesis on relevant studies highlighting the design and performance candidature of these niche BSSMs in EV applications, especially when compared to the well-developed Prius–IPM motor.

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Byung-Taek Kim, Byun-Il Kwon, and Seung-Chan Park. "Reduction of electromagnetic force harmonics in asynchronous traction motor by adapting the rotor slot number." IEEE Transactions on Magnetics 35, no. 5 (1999): 3742–44. http://dx.doi.org/10.1109/20.800650.

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Bednarik, Bernard, Milan Pospisil, Jiri Drabek, and Jan Valuska. "A Method of Projecting of Electric Drive for the Traction Vehicle with wn Asynchronous Motor." Communications - Scientific letters of the University of Zilina 1, no. 1 (March 31, 1999): 18–30. http://dx.doi.org/10.26552/com.c.1999.1.18-30.

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Kazakov, Yu B., and I. A. Palilov. "Research into inter-related electromechanical processes in the asynchronous traction motor – asynchronous generator system with a common shaft based on field models." Vestnik IGEU, no. 2 (2015): 42–46. http://dx.doi.org/10.17588/2072-2672.2015.2.042-046.

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Solomin, Vladimir A., Anastasia A. Bichilova, Larisa L. Zamshina, and Nadezhda A. Trybitsina. "Adjustable Squirrel-Cage Linear Induction Motor for Magnetic Levitation Transport." Transportation systems and technology 3, no. 4 (December 15, 2017): 127–49. http://dx.doi.org/10.17816/transsyst201734127-149.

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The article deals with linear induction motor (LIM) with a squirrel-cage winding of the secondary element (SE), which functions as the armature of the machine. Linear location of squirrel-cage winding of the secondary element of LIM allowed suggesting a number of options for the regulation of the winding resistance of SE. Objective. Development and research of LIM with adjustable winding resistance of the secondary element for magnetic levitation transport, and the study of the properties of adjustable LIM. At the modern level of development of the electrical engineering, asynchronous electric drive and magnetic levitation transport, the primary method of changing the frequency rotation of motor and speed of linear motion of high-speed transport vehicles is frequency control. Frequency control allows changing the frequency of rotation of the machine and linear speed of LIM smoothly and in broad diapason. The high cost of static electronic converters of high power limits the large-scale application of frequency control. The increase of the current frequency also leads to lower torque and traction. Results. According to the authors, the application of the adjustable linear induction motors with variable resistances of short-circuited windings of the secondary elements will allow to expand the range of control of LIM, intended for high-speed magnetic levitation transport with the realisation of large traction, including the start (starting the vehicle) by means of current displacement in the groove of the secondary element of the LIM. Conclusion. The linear induction motors of this type, as well as the calculation of the magnetic field in the groove of the secondary element, and evaluation of the influence of the current displacement on the starting and controlling features of the machine are considered.

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Shlendov, Igor'. "Energy Unit Expenses of Trains with Asynchronous Electric Drive." Bulletin of scientific research results, no. 1 (March 30, 2022): 118–28. http://dx.doi.org/10.20295/2223-9987-2022-1-118-128.

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Objective: The assessment of energy effectiveness of traction drives for carriages of rolling stock models 81-765/766/767 and 81-556/557/558 (“NEVA”) from various producers and drafting technical requirements for drive electric equipment. Stock 81-765/766/767 uses asynchronous engine of 170 kW wattage and 43 Hz field rated frequency, 81-556/557/558 — 167 kW with 70 Hz rated frequency. Methods: The comparative analysis of drive energy indicators of trains with asynchronous electric drives has been accomplished in accordance with the calculation methodology. Measuring section was set in accordance with GOST P 50850-96. There are defined the assumptions at motion of rolling stock with equal maximal acceleration in a runaway and maximal deceleration in a braking and constant deceleration in a run-out. Maximal acceleration and deceleration were calculated incompliance adhesion set coefficient, grip weight (mass of motor cars) and moment of inertia. The calculation by method of analytical integration of motion differential equation was held on runaway five intervals. Initial technical data of trains with rated load as well as calculated indicators at train motion on measuring section were accepted. Diagrams of train motion on section were built and comparative analysis of characteristics of stock carriage models 81-765/766/767 and 81-556/557/558 (“NEVA”) was pursued. Results: It was established during the comparison that engine overload by torque on shaft is the same with 1.5 coefficient to rated torque. Stocks have significantly different indicators as by unit expenses as well as by motion dynamics. It’s been also established that for to minimize energy costs for traction it’s required to develop maximally allowable deceleration at braking and maximally allowable acceleration at runaway. Practical importance: The necessity of entry into Technical Task for new rolling stock of the requirement on stock check on runaway possibility with maximal set acceleration.

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Steczek, Marcin. "Effect of the supply voltage fluctuations on the efficiency of the technique of shaping the current spectrum generated by VSI traction drive." MATEC Web of Conferences 180 (2018): 05002. http://dx.doi.org/10.1051/matecconf/201818005002.

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The issue of interfering influence of traction vehicles on railway traffic control systems is a serious problem posing a threat to railway traffic safety. This issue is gaining in importance as more and more vehicles equipped with traction inverters are put into service. Current harmonics generated by traction vehicles equipped with voltage source inverters can be controlled in such a way that they do not exceed the limits imposed by railway operators. One of the current harmonic control techniques, proposed by the authors, is the use of a combination of SHE (Selective Harmonic Elimination) and SHM (Selective Harmonic Mitigation) techniques to control the traction voltage source inverter. In this article, the author present the results of investigations on the influence of supply voltage fluctuations on the efficiency of shaping techniques of the current harmonic spectra taken from the DC network by VSI traction drive system, using the SHE and SHM modulation techniques. Regarding the fact that in 3 kV DC electric traction systems, fluctuations of the vehicle's supplying voltage are accepted in a wide range, it is necessary to determine the influence of voltage changes on the proposed modulation techniques. The research object is a simulation model of traction drive which consisting of an asynchronous motor fed by a voltage source inverter. The simulation model was verified by the means of measurements performed at a low scale laboratory stand. Analysis of the tested techniques when supplying voltage is fluctuating, allows to evaluate their usefulness in real operating conditions. The results obtained for SHE and SHM techniques were compared with SPWM modulation.

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Baranov, V. A., I. P. Vikulov, A. A. Kiselev, and A. S. Maznev. "Monitoring system of electrodynamic braking of DC electric train with collector traction motors." Vestnik of the Railway Research Institute 77, no. 5 (November 13, 2018): 301–9. http://dx.doi.org/10.21780/2223-9731-2018-77-5-301-309.

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High proportion of electric trains with collector trac-A monitoring system of electrodynamic braking has been develotion motors in the multiple unit fleet and its low cost in comparison ped with preservation of the electric train standard equipment. It al-with electric trains with an asynchronous traction make it neces-lows regulating the recuperative current depending on the possibility sary to improve the control system of motor collectors. One of the of its consumption by changing the resistance of the braking resistors. ways is to create devices to improve the efficiency of recuperative Imitation model of DC electric train power circuit in the electrobraking. dynamic braking mode with a monitoring system was developed.It takes into account the influence of eddy currents in the motor frame, armature current ripples and the catenary voltage increase during recuperative braking.Electromagnetic processes in the electric train power circuit are investigated. Analysis of the obtained oscillograms shows the change in the armature current and the catenary voltage within the specified limits in the braking mode. Recuperative current regulator is tuned to an aperiodic transient with a time equal to 0.015 s.The paper shows possibility of the monitoring system to regulate the armature current in the recuperative mode together with the automatic braking control system in case of increasing the catenary voltage. When the voltage fails, the monitoring system is not able to limit the increasing braking current, its reduction is effected by the magnetic flux of the traction motors.Adjusting characteristic and the technical effect from the implementation of the monitoring system are calculated. The possibility of reducing the electric power consumption by 4.62 % is shown.

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Journal articles on the topic 'Asynchronous traction motor'

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