Journal articles: 'Railway traction motor'

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Kamar, Syamsul, Meiyanne Lestari, Hilda Luthfiyah, Okghi Adam Qowiy, Eko Syamsuddin Hasrito, and Sofwan Hidayat. "Determination analysis of main dimensions of induction motors for railway propulsion system." Bulletin of Electrical Engineering and Informatics 14, no. 3 (2025): 1727–34. https://doi.org/10.11591/eei.v14i3.8554.

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Induction motors are used in industrial production processes. As for its use as a traction motor, it requires special design and manufacture. The type of induction motor that is widely chosen as a traction motor for railways is a squirrel-cage three-phase induction motor. The main consideration for the selection or design of an induction motor as a railway traction motor is the torque requirement to drive the train. Other parameters that are considered in the selection of an induction motor as a traction motor include available spaces for installation. This research is using a three-phase, 2,300 VAC, 480 kW, and 50 Hz induction motor. By using the application program for determining the parameters of the induction motor, it shows that the motor produces a moderate output coefficient (between maximum and minimum) and produces a torque greater than induction motor torque in general. As a result of the analysis, this induction motor is suitable to be used as a motor for the railway, where greater torque is required.

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Kamar, Syamsul, Meiyanne Lestari, Respatya Teguh Soewono, et al. "Performance analysis of three-phase induction motor for railway propulsion system." International Journal of Power Electronics and Drive Systems (IJPEDS) 14, no. 3 (2023): 1433. http://dx.doi.org/10.11591/ijpeds.v14.i3.pp1433-1441.

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A three-phase induction motor absorbs the most electric power among other electrical loads. Therefore, three-phase induction motors are the primary electric motors used in industrial applications thanks to their simple construction and easy operation, as well as low cost and low maintenance costs. Efficiency is a critical parameter that characterizes an induction motor as a traction motor. The traction motor is defined as the engine's effectiveness in converting electrical power at its input into mechanical energy by rotating torque on its axis. One way to analyze the efficiency is to use test data obtained from laboratory tests in case-loaded and no-load tests. Calculations using several formulas on the efficiency of an induction motor as a traction motor produce the same result, namely the efficiency of 98.6% by applying variable frequency drive (VFD). The result of laboratory tests and their analysis can be used as a reference for designing three-phase induction motors for railway traction motors, especially traction motors for high-speed trains<em>.</em>

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Syamsul, Kamar, Lestari Meiyanne, Teguh Soewono Respatya, et al. "Performance analysis of three-phase induction motor for railway propulsion system." International Journal of Power Electronics and Drive Systems 14, no. 3 (2023): 1433~1441. https://doi.org/10.11591/ijpeds.v14.i3.pp1433-1441.

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A three-phase induction motor absorbs the most electric power among other electrical loads. Therefore, three-phase induction motors are the primary electric motors used in industrial applications thanks to their simple construction and easy operation, as well as low cost and low maintenance costs. Efficiency is a critical parameter that characterizes an induction motor as a traction motor. The traction motor is defined as the engine's effectiveness in converting electrical power at its input into mechanical energy by rotating torque on its axis. One way to analyze the efficiency is to use test data obtained from laboratory tests in case-loaded and no-load tests. Calculations using several formulas on the efficiency of an induction motor as a traction motor produce the same result, namely the efficiency of 98.6% by applying variable frequency drive (VFD). The result of laboratory tests and their analysis can be used as a reference for designing three-phase induction motors for railway traction motors, especially traction motors for high-speed trains.

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Zuev, A. S., and M. D. Glushchenko. "Study of an Asynchronous Traction Motor with Inclined Slot Rotor." World of Transport and Transportation 21, no. 6 (2024): 60–64. http://dx.doi.org/10.30932/1992-3252-2023-21-6-7.

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Modernisation of railway rolling stock which is quite relevant from the perspective of growing performance of railways can be achieved among other ways through improvement of features of traction drive, namely of traction electric motors, that defined the objective of the study. The inclined shape of the rotor slots is characteristic of a proposed design of asynchronous traction electric motor with a squirrel-cage rotor winding for a passenger electric locomotive which features are subject to the analysis. The results of experimental and computer modelling confirmed the positive effect of using a rotor with inclined slots in the design of an asynchronous traction motor, which consists in reducing the current in the windings and reducing motor power losses. The obtained results of improving the technical features of an asynchronous traction motor due to the use of a rotor with inclined slots in its design allow expand recommendation for its use on locomotives.

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Thanh Ha, Vo, Pham Thi Giang, and Phuong Vu. "Multilevel inverter application for railway traction motor control." Bulletin of Electrical Engineering and Informatics 11, no. 4 (2022): 1855–66. http://dx.doi.org/10.11591/eei.v11i4.3964.

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This paper will present why choosing a 7-level reverse voltage source fed to three-phase induction motors to the railway traction motor. In addition, this paper shows the implementation of space vector pulse width modulation (SVPWM) and the math model of induction motor, stator currents, and speed controller design of electric traction drive system based on field-oriented control (FOC). By MATLAB/Simulink method, this multi-level inverter in FOC structure reduces total harmonic distortion (THD) more than other multi-level inverters such as 3 and 5-level inverter. Furthermore, this FOC control structure combined with 7-level inverter improved speed and torque responses required for railway traction motor load.

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Vo, Thanh Ha, Thi Giang Pham, and Vu Phuong. "Multilevel inverter application for railway traction motor control." Bulletin of Electrical Engineering and Informatics 11, no. 4 (2022): 1855~1866. https://doi.org/10.11591/eei.v11i4.3964.

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This paper will present why choosing a 7-level reverse voltage source fed to three-phase induction motors to the railway traction motor. In addition, this paper shows the implementation of space vector pulse width modulation (SVPWM) and the math model of induction motor, stator currents, and speed controller design of electric traction drive system based on field-oriented control (FOC). By MATLAB/Simulink method, this multi-level inverter in FOC structure reduces total harmonic distortion (THD) more than other multilevel inverters such as 3 and 5-level inverter. Furthermore, this FOC control structure combined with 7-level inverter improved speed and torque responses required for railway traction motor load.

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Khandekar, Mr Nagnath V., Mr Sohel Tayyab Deshmukh, Mr Ganesh Savata Gaikwad, Mr Manojkumar Balaso Lokare, and Mr Shubham Chandrakant Lokare. "Prototype Model of Electric Locomotive Traction System." International Journal for Research in Applied Science and Engineering Technology 12, no. 5 (2024): 41–44. http://dx.doi.org/10.22214/ijraset.2024.61336.

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Abstract: Electrical locomotive is driven by DC series motor of 12V. The torque produced by motors is used to move the locomotive. The main supply to the motor is given through pantographs. The total length of path is 6 feet approximately. The other main equipment are rectifiers, Step-down transformer. Rectifier is used for conversion of alternating current to direct current, Step-down transformers used for convert high voltage power to a low voltage The railway is one of the largest and oldest methods of the transportation in our country serving many people in many ways. The major problem in railways is derailing and obstruction to the locomotive in different ways. Traction is basically two types, electrical traction and nonelectric traction. Electric traction is most advantageous and economical with less maintenance when compared to other.

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Duffy, M. C. "Three-phase motor in railway traction." IEE Proceedings A Science, Measurement and Technology 139, no. 6 (1992): 329. http://dx.doi.org/10.1049/ip-a-3.1992.0053.

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Et.al, Ho-Joon Lee. "A Study on The Fully Enclosed Housing Of Interior Permanent Magnet Synchronous Motor." Turkish Journal of Computer and Mathematics Education (TURCOMAT) 12, no. 6 (2021): 687–91. http://dx.doi.org/10.17762/turcomat.v12i6.2071.

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Approximately 2.5 billion won can be saved every year by replacing existing induction motors, which are traction motors for urban railway vehicles, with permanent magnet motors. This paper presents a study on the structural design of a completely enclosed motor to commercialize an interior permanent-magnet synchronous motor (IPMSM) for the traction of urban railway vehicles. The proposed solution provides protection from an inflow of dust and magnetic powder into the rotor that can deteriorate the motor performance and cause burnout. In addition, unless it is a water-cooled or oil-cooled structure, cooling of an electric motor used in medium and large-sized equipment is not easily accomplished. However, completely enclosed motors are vulnerable to overheating; therefore, research into housing design is required to provide cooling. Additionally, the permissible current density through the stator winding must be considered in the design to prevent the occurrence of thermal demagnetization of permanent magnets. Furthermore, IPMSMs require a separate driver for operation and speed controls for a wide range of operating conditions such as rail traction. Thus, a study has been conducted on IPMSMs and other related driver and control technologies, and their suitability has been validated through performance tests.

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Enache, Sorin, Monica-Adela Enache, and Ion Vlad. "Considerations Regarding the Middle Power Asynchronous Motors for Railway Electrical Traction." Energies 17, no. 17 (2024): 4327. http://dx.doi.org/10.3390/en17174327.

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In modern electric traction, direct current traction motors have been replaced with asynchronous motors with a short-circuited rotor. The justification is that asynchronous motors are more reliable, cheaper, and have smaller weights and dimensions, so they are more sustainable. In order to start and adjust the speed required in traction, these motors are powered from the contact line using a transformer and a static voltage and frequency converter. As a result, you can use green electricity produced with wind power plants or solar energy converted with photovoltaic panels, increasing sustainability because the consumption of traditional fuels is reduced. This paper presents various simulations emphasizing the negative effects of the distorting regime, with concrete results. The quality of the simulations carried out is increased by using a mathematical model, which uses the variable parameters of the motor dependent on the modulation of the current and the magnetic saturation. In modern 1500 kW electric locomotives, the traction motors are powered by static converters, which means an increase in losses when operating at nominal load on the motors by 38.7 kW and 217.8 kVAR compared to the sinusoidal three-phase power supply. Thus, the research carried out provides qualitatively and quantitatively correct simulations of the non-sinusoidal regime related to the asynchronous traction motor in order to increase the sustainability of this traction system.

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Hill, R. J. "Electric railway traction. Part 1: Electric traction and DC traction motor drives." Power Engineering Journal 8, no. 1 (1994): 47–56. http://dx.doi.org/10.1049/pe:19940105.

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Uyulan, Çağlar, and Metin Gokasan. "Modeling, simulation and re-adhesion control of an induction motor–based railway electric traction system." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 232, no. 1 (2017): 3–11. http://dx.doi.org/10.1177/0959651817732487.

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Increasing the traction force is a complex problem in the design of railway vehicles; therefore, effective traction systems and algorithms have to be developed. During the traction process, the verification of traction algorithms and control strategies are based on simulations covering all locomotive dynamics. In this article, traction model of a railway vehicle and re-adhesion control method based on simulation approach are investigated to obtain more effective results. The longitudinal dynamic of a railway vehicle having traction system, which comprises two parallel motor groups, each of which has two field-oriented induction motor connected in series, is simulated to examine time-dependent changes in motor stator currents, traction torque, adhesion and resistance forces according to a given speed reference. The interaction between the adhesion force and the slip ratio is established according to the Burckhardt adhesion model, and a modified super-twisting sliding mode slip control is implemented in a computer simulation under various contact conditions so that simulation results approve the presented control method works under the maximum adhesion force. The comparison between the classical and modified version of the proposed control strategy was made to better evaluate the performance of the control system and to better optimize the traction system.

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Kharlamov, Viktor, Pavel Shkodun, and Andrey Ognevsky. "Effect of transient processes on the switching stability of dc machines." MATEC Web of Conferences 239 (2018): 01036. http://dx.doi.org/10.1051/matecconf/201823901036.

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Effective use of fuel and energy resources is one of the main tasks in modern industry and transport. The main directions of increasing the energy efficiency of the electric rolling stock of railways are considered in the paper. For the electric rolling stock of railways, a significant proportion of electric power consumption falls on traction needs. The consumption of electrical energy and its recovery directly depends on the proper operation and fine-tuning of the magnetic system and switching of traction electric motors of the rolling stock. The methods of testing traction electric motors currently used in railway transport do not fully correspond to their operating modes during operation. For more reliable control of their condition, a methodology for estimating the nature of the operation of traction electric motors in conditions close to real ones was proposed. Studies of the influence of transient processes on the quality of switching of traction electric motors taking into account operating conditions are carried out. Based on the results of the study, the analysis of the data obtained is carried out, and a criterion for estimating the switching stability of traction electric motors in transient operation modes is proposed. The proposed criterion allows carrying out quality control of the tuning of the magnetic system and switching of the traction electric motor, and also estimating the nature of its operation in various modes, taking into account the operating conditions.

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Troitskiy, Pavel S. "Algorithm for selecting motor and trailer cars in a freight train of motor-car traction according to the energy efficiency criterion." Transportation Systems and Technology 6, no. 1 (2020): 104–19. http://dx.doi.org/10.17816/transsyst202061104-119.

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Background: improving the efficiency of freight transport is one of the main challenges facing the world's Railways. One of the most effective solutions is the introduction of distributed motor-car cargo traction. This will significantly increase the operational efficiency of the train's power plant, improve its handling, reduce the amount of destructive impact on the track, increase the capacity of railway lines and the reliability of deliveries of perishable goods. When considering the allocation algorithm for operating the traction motors (TED) on the composition of a diesel freight trains subject to the conditions of alignment resource all TED motor coaches concluded the possibility of increasing the efficiency of multimotor traction drive modular freight trains using the proposed control algorithms for energy efficiency. Aim: formalization of the task of selecting motor and trailer cars in a modular electric freight train. Methods: In article the algorithm of selection of motor and trailer cars on a freight train railcar traction on the criterion of energy efficiency, the benefits of adopting a modular truck trains, are the main prerequisites for the implementation of distributed railcar truck pull. The work is based on the theory of traction calculations for train operation and is aimed at ensuring safe and energy-efficient traffic along the route sections. Results: The developed algorithm of selection of motor and trailer cars in a unit train freight based on the condition of ensuring the traction and coupling properties of the train on the current upgrades, the development of the total volume of cargo offered for transport and energy efficiency of this type of traction. When using the proposed algorithms for managing the energy efficiency of a motor-car electric train by selecting motor and trailer cars, adjusting the power, number of traction engines and their distribution by the composition of the traun, energy consumption on the Medvezhya Gora Noviy Poselok section can be reduced by 20.5% in the direction there and by 18.9% in the direction back without changing the traffic schedule. And when compared with a locomotive-hauled train that regulates energy consumption using the same algorithm by 4.49% and 3.61%, respectively. Energy consumption on the Krivenkovskaya Goitkh section can be reduced by 16% in the direction there and by 82% in the direction back without changing the traffic schedule. And when compared with a locomotive-hauled train that regulates energy consumption by the same algorithm by 1.61% and 65.92%, respectively. Conclusions: The author proposes an algorithm for selecting motor and trailer cars in a freight train of motor-car traction according to the criterion of energy efficiency with the condition of ensuring traction and coupling properties on the calculated lifts. As well as the algorithm of distribution of working traction engines by the composition of the freight trains, taking into account the requirement of equalizing the resource of their work, preventing overheating and hypothermia of the fuel and energy system, and improving train handling.

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Issa, Razan, Guy Clerc, Malorie Hologne-Carpentier, et al. "Review of Fault Diagnosis Methods for Induction Machines in Railway Traction Applications." Energies 17, no. 11 (2024): 2728. http://dx.doi.org/10.3390/en17112728.

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Induction motors make up approximately 80% of the electric motors in the railway sector due to their robustness, high efficiency, and low maintenance cost. Nevertheless, these motors are subject to failures which can lead to costly downtime and service interruptions. In recent years, there has been a growing interest in developing fault diagnosis systems for railway traction motors using advanced non-invasive detection and data analysis techniques. Implementing these methods in railway applications can prove challenging due to variable speed and low-load operating conditions, as well as the use of inverter-fed motor drives. This comprehensive review paper summarizes general methods of fault diagnosis for induction machines. It details the faults seen in induction motors, the most relevant signals measured for fault detection, the signal processing techniques for fault extraction as well as some classification algorithms for diagnosis purposes. By giving the advantages and drawbacks of each technique, it helps select the appropriate method that could address the challenges of railway applications.

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UYULAN, Caglar, and Metin GOKASAN. "EXTENDED KALMAN FILTER DESIGN FOR RAILWAY TRACTION MOTOR." Selcuk University Journal of Engineering ,Science and Technology 5, no. 4 (2017): 432–44. http://dx.doi.org/10.15317/scitech.2017.103.

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KATUGA, YUSUFU, Ramadhani Kivugo, and Pius Chombo. "Reliability Improvement in the Traction System of Tanzania Standard Gauge Railway." Tanzania Journal of Engineering and Technology 42, no. 4 (2024): 108–17. http://dx.doi.org/10.52339/tjet.v42i4.932.

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In recent years, many African governments have been developing Standard Gauge Railway (SGR) to replace the old after becoming absolute, inefficient Meter Gauge System (MGR) to carry more loads at high mileage and speed while combating the oil and environmental crises. With the increase of SGR, the amount of traction systems has grown sharply, the service life of the traction system has increased gradually, and the components of the vehicle traction system have become worn and aged as a result. While Tanzania is transitioning to SGR with its gradually increasing traction systems, reliability improvement becomes a key for the sustainability of its high-speed train services. This paper, therefore, aims to improve the reliability of traction motors used in Tanzania’s SGR. Firstly, the factors affecting the reliability of the traction system of Tanzania’s SGR and their significance are evaluated. Secondly, the computerized maintenance management system (CMMS) is designed to streamline and automate the maintenance management processes of the traction system of Tanzania’s SGR. Finally, a regression model is established to forecast the uptime based on the established factors. The obtained uptime hours were predicted in order to compute the reliability of the traction motor and its criticality in operation. Critical factors for improving reliability have also been highlighted. These findings play vital roles in establishing the fundamentals of factors that affect reliability as well as strategies and countermeasures to extend the operational life of the traction motors cost-effectively.

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Miroshnichenko, E. E. "Highly reliable switched reluctance motor for the traction electric drive system of railway rolling stock." Omsk Scientific Bulletin, no. 188 (2023): 70–76. http://dx.doi.org/10.25206/1813-8225-2023-188-70-76.

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The main purpose of this work is to create conditions for the use of switched reluctance motor in the traction electric drive system of rolling stock by increasing the reliability of its bearings. The object of the study is the traction switched reluctance motor. The task has been set, which consists in developing an algorithm that allows to calculate the characteristics of the traction switched reluctance motor at the stages of design and production, taking into account the forces of a oneway magnetic attraction. The forces of one-way magnetic attraction, arising in the air gap of the electric motor with two types of its non-uniformity are studied. A proposal has been made to limit the force of the one-way magnetic attraction to a force at a permissible residual imbalance. As a result, an algorithm for determining the characteristics of the traction switched reluctance motor is unique in its kind, which makes it possible to reduce the effect of forces of the one-way magnetic attraction on bearings. The use of switched reluctance motor with a long service life of bearings in the traction drive system will make it possible to obtain a new competitive rolling stock.

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Dubravin, Yuriy, Yaroslav Shostak, Vitaly Bakhonya, and Viktor Tkachenko. "Justification of choice of methods for diagnostics of insulation condition of electrical machines of electric railway stock." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", no. 43 (June 18, 2024): 76–89. http://dx.doi.org/10.32703/2617-9059-2024-43-6.

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The object of the study is the process of monitoring the technical condition of electrical insulation of traction electric machines in order to determine the need for their maintenance or repair. Diagnostics of electric machines is an important aspect of supporting the operation of electric drives. Failure of the windings is one of the main reasons for failure of electric motors. Therefore, the task of developing operational methods for diagnosing the insulation of windings of traction electric motors is urgent. A study of the negative impact of operating conditions on the technical condition of electrical insulation of motors was carried out. The analysis of the existing methods of diagnosis of insulation systems of electric machines was carried out. Special attention was paid to the selection of predictive parameters of the insulation state. A mathematical model was developed to study the frequency characteristics of the stator insulation system of the traction electric motor model AD914. Refined dependences of the effect of changes in the insulation parameters of the motor stator winding on its frequency characteristics were obtained. It was concluded that the method of monitoring the insulation state of electric motor windings based on the assessment of electrical resistance relative to the stator core and amplitude-frequency characteristics is the most effective. The field of practical application of the obtained results is the system for monitoring the condition of electrical insulation of traction electric machines to determine the schedule of their maintenance and repair. The conducted research is a scientific justification for the choice of methods and devices for diagnosing the insulation state of electric motors of railway traction rolling stock.

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Laushkin, Eduard, Valery Chernov, and Valery Pashinin. "USE OF MACHINE LEARNING TO IMPROVE THE ACCURACY OF PLANNING ENGINE OIL SUPPLY." Transport engineering 2025, no. 1 (2025): 62–67. https://doi.org/10.30987/2782-5957-2025-1-62-67.

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Application of machine learning to calculate the supply of motor oils to railway grounds is considered. The study objective is to use artificial intelligence and other machine learning methods to ensure the supply of motor oils and to provide stable operation of traction rolling stock. The possibility of using machine learning to improve the accuracy of planning the supply of motor oils to railway grounds, excluding the human factor from the calculation, is analyzed. The following research methods are used: the method of using a heat map, machine learning methods, intelligence analysis, and linear regression. As a result of the study, it is found that it is more expedient to use Lasso Regression when developing a program for calculating the supply of motor oils for its use in traction rolling stock.

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Onat, Altan, Petr Voltr, and Michael Lata. "An unscented Kalman filter-based rolling radius estimation methodology for railway vehicles with traction." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 232, no. 6 (2017): 1686–702. http://dx.doi.org/10.1177/0954409717745201.

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Monitoring the conditions of railway vehicle systems plays an important role in the maintenance of safety and performance of railway vehicles. Rolling radius is one of the properties that should be monitored continuously for the predictive maintenance of a railway vehicle since it changes with time due to wheel wear. In this study, a model-based condition monitoring methodology, which is based on an unscented Kalman filter, is proposed. The model includes the torsional dynamics of an independently rotating tram wheel with a traction motor and a contact model. The rolling radius is estimated by considering the traction effort of the motor and the angular velocity measurements. The proposed methodology is tested on a tram wheel test stand (roller rig), which has a wheel on roller configuration. First, a mathematical model is validated by the measurements taken from the test stand. Second, the unscented Kalman filter is applied as a parameter estimator. The results demonstrate that the proposed scheme is a promising option to be used in the predictive condition monitoring of the wheel profile for traction vehicles.

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Yıldırım, Doğan, Mehmet Hakan Akşit, Işık Çadırcı, and Muammer Ermiş. "All-SiC Traction Converter for Light Rail Transportation Systems: Design Methodology and Development of 165 kVA Prototype." Electronics 11, no. 9 (2022): 1438. http://dx.doi.org/10.3390/electronics11091438.

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The design and development of a high-performance 165 kVA, 750 V DC all-silicon carbide (SiC) traction converter for new generation light rail transportation systems (LRTSs) are described. In the design of the traction motor drive, the efficiency of the overall system is maximized and the line current harmonic content of the traction motor is minimized. A complete mathematical model of the physical system is derived to carry out real-time simulations and proper control of the LRTS on a real rail track. The electrical and thermal performances of traction-type SiC power MOSFET modules are compared with those of alternative hybrid and Si-IGBT modules for various switching frequencies. The implementation of the developed system is also described. The performance of the resulting system is verified experimentally on a full-scale physical simulator as well as for various track conditions. Very promising results for the next generation railway traction motor drives have been obtained in terms of performance criteria, such as very high efficiency, low harmonic distortion of the motor line current, low cooling requirement, relatively high switching frequency, and hence, superior controller performance. The effects of the SiC power MOSFET operation on the insulation of the available traction motors are also examined experimentally. This paper is accompanied by a video demonstrating the experimental work.

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Wu, Zhensheng, Xinyi Zhao, and Deling Fan. "Research on the Influence of Traction Load on Transient Stability of Power Grid Based on Parameter Identification." Energies 16, no. 22 (2023): 7553. http://dx.doi.org/10.3390/en16227553.

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The traction load of electrified railways is a special user of the power system, which will have a significant impact on and pose a challenge to the power system after grid connection. Considering the impact and fluctuation of traction load connected to the power grid, this paper proposed a method to study the influence of traction load on the transient stability of the power grid based on parameter identification. Firstly, according to the operation characteristics of traction load, a comprehensive traction load model based on the measurement-based method of induction motor parallel power function model is selected, and the objective function of parameter identification is determined. Then, the specific steps of using the improved gray wolf optimizer (IGWO) algorithm to achieve the parameter identification of the traction comprehensive load model are introduced, including chaotic map, nonlinear convergence factor, and individual position update. Next, with the IEEE39 bus system as the network background, the load parameters identified by the measured data of a line of the Beijing–Shanghai high-speed railway are imported into the Power System Analysis Software Package (PSASP) 7.0 for transient simulation to analyze the impact of traction load on the transient stability of the power grid. Finally, three typical load models are compared with the traction load model to draw relevant conclusions, and it is verified that the traction load characteristics are different from the general load model, which provides reference for the connection of electrified railway traction load to the power grid and the economic and technical construction of the power system.

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Ma, Fa Yun, Hua Wei Li, Bing Guang Han, and Jian Zhong Xu. "Simulation Model of Traction Systems for CRH2 EMU Based on PSCAD/EMTDC." Advanced Materials Research 328-330 (September 2011): 662–66. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.662.

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The high-speed railway based on electromechanical integration develops rapidly in China in recent years. In order to improve research for electrified railway, a model of AC-DC-AC electric locomotive is established using electro- magnetic transient software PSCAD/EMTDC. In this paper, a single-phase tri-level rectifier of unit power factor and its control strategy of direct transient current control method are introduced at first. And then the working principles of the voltage space vector control strategy of inverter and the vector control strategy of cage motors are analyzed. The inverter and the motors must be as a whole because of the realization of motor vector control based on SVPWM inverter. At last, a model is established and the correctness and effectiveness of the model can be verified by the corresponding theory results. The simulation model is useful for the analysis of low frequency resonance in locomotives. The results will be applied in the research of mechanics and electric coupling in high speed electrified railway.

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Menschikov, Igor A., Andrey S. Kosmodamianskiy, Sergey I. Batashov, and Andrey A. Fateev. "Diagnostics of the defects of the ED9T electric train traction motor with the method of spectral analyses of current in the armature winding." Transport of the Urals, no. 2 (2024): 35–40. http://dx.doi.org/10.20291/1815-9400-2024-2-35-40.

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The results of the research in the sphere of the efficiency increase of functioning of the traction electric motor of the ED9T electric train have been presented. Smooth and sustainable railway transport operation depends greatly on the reliability of the traction motor of the ED9T electric train and its efficiency of use. The most widespread damages in the armature winding of the traction motor of ED9T electric train are violations of the terms of the armature commuting, inter-winding faults because of the damage of the insulation of coil turns, closure of winding on the case («ground») and double closures on the ground. The authors offered a logarithmical spectral method of diagnostics allowing to determine malfunctions on the results of mathematical spectrogram processing for rapid clarification of the faults of the armature windings of the traction electric motor.

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Chen, Ping, Qi Ping Shen, Xue Yan Han, Ren Yuan Tang, and Ke Yan Xin. "Analysis of Water Cooled Permanent Magnet Traction Motors Using 3D Fluent and Thermal Field." Applied Mechanics and Materials 325-326 (June 2013): 375–78. http://dx.doi.org/10.4028/www.scientific.net/amm.325-326.375.

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This paper gives a method to calculate the temperature rise of the water cooled PM railway traction motor using 3D fluent and thermal field. Building a 3D Finite Element Method (FEM) model of 20kW PM synchronous traction motor, the heat transfer coefficient of each tunnel wall is calculated by fluent field, and then the temperature distribution is got from thermal field. Compared with the experimentation, the precision of this method is verified and some conclusions are obtained.

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Ha, V. T., P. T. Giang, and V. H. Phuong. "T-Type Multi-Inverter Application for Traction Motor Control." Engineering, Technology & Applied Science Research 12, no. 2 (2022): 8321–27. http://dx.doi.org/10.48084/etasr.4776.

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The structure and principle of the T-type 3-level reverse voltage source that will be fed to three-phase induction motors will be presented in this study. The implementation of Space Vector Pulse Width Modulation (SVPWM) and the math models of the induction motor, the stator currents, and the speed controller design of the electric traction drive system based on Field-Oriented Control (FOC) will be also shown. This three-level T-type inverter in the FOC structure decreases Total Harmonic Distortion (THD) more than the previous two-level inverters. By combining the FOC control structure with the T-type 3-level inverter, the speed and torque responses necessary for railway traction motor load were improved. Finally, Matlab/Simulink will be used to demonstrate the correctness of the T-Type multi-level inverter theory.

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Mihal'chuk, Nikolay, Yuriy Popov, Anatoliy Savos'kin, Oleg Pudovikov, and Anton Chuchin. "Improving the Efficiency of the Electric Locomotive Drive with a Controllable Converter for Traction Motor Excitation." Bulletin of scientific research results 2023, no. 2 (2023): 81–91. http://dx.doi.org/10.20295/2223-9987-2023-2-104-114.

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Purpose: To substantiate the circuit design and algorithms for individual smooth and automatic control of single-phase direct current electric locomotives according to the laws of constant traction force and constant power without breaking the electric locomotive power circuits in order to increase the efficiency of its electric drive with controllable traction motor excitation converters. As a circuit design solution, it is proposed to apply a power electrical circuit with two rectifier-inverter converters for each section of the electric locomotive for bogie-based traction control, as well as individually controlled bridge transistor converters, shunting field windings, for axial traction control within each bogie. Methods: The development of circuit solutions using modern power semiconductor converters; theory of automatic control and design of finite state machines; mathematical modeling of electromagnetic, electromechanical and mechanical processes. Results: The developed control algorithms provide the possibility of obtaining traction characteristics of an electric locomotive that vary according to the laws of constancy of traction force or constancy of power, bringing the traction characteristics of electric locomotives with collector traction motors to the characteristics of electric locomotives with asynchronous traction motors. The calculations performed confirmed the possibility of implementing an algorithm for individual control of traction motor currents and their excitation currents, as well as traction forces, which ensures a smooth increase in the traction force of an electric locomotive.Practical significance: The developed technical solutions applicable in the manufacture of modern and modernization of operated electric locomotives will ensure an increase in the traction properties of singlephase DC electric locomotives and will contribute to an increase in the throughput and carrying capacity of the railway network.

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Kang, Lili, Dongjie Jiang, Chaoying Xia, Yongjiu Xu, and Kaiyi Sun. "Research and Analysis of Permanent Magnet Transmission System Controls on Diesel Railway Vehicles." Electronics 10, no. 2 (2021): 173. http://dx.doi.org/10.3390/electronics10020173.

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As the energy crisis and environmental pollution continue to be a gradual threat, the energy saving of transmission systems has become the focus of railway vehicle research and design. Due to their high-power density and efficiency features, permanent magnet synchronous motors (PMSM) have been gradually applied in railway vehicles. To improve the efficiency of the transmission system of diesel railway vehicles, it is a good option to use PMSM as both a generator and traction motor to construct a full permanent magnet transmission system (FPMTS). Due to the application of the new FPMTS, some of the original control strategies for diesel railway vehicle transmission systems are no longer applicable. Therefore, it is necessary to adjust and improve the control strategies to meet the needs of FPMTS. We studied several key issues that affect the reliability and comfort of the vehicles. As such, this paper introduced the FPMTS control strategy, including the coordinated control strategy of the diesel and the traction motor, the two degrees of freedom (2DOF) decoupling current regulator, the maximum torque control of the standardized unit current, the wheel slip protection control, and the fault protection strategy. The experiment was carried out on the test platform and the test run of the diesel shunting locomotive equipped with the FPMTS. The results showed that the control strategy described in this paper met the operation characteristics of the FPMTS and that the control performance was superior. The study of FPMTS lays the foundation for the subsequent application of permanent magnet motors in high-powered diesel locomotives and high-speed diesel multi-units.

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Visin, M. H., and D. A. Zabarylo. "The six-wheel fright truck locomotive of double delivery uses radio-frequency transfer with padding and asynchronized traction impellents." Science and Transport Progress, no. 36 (March 25, 2011): 64–69. http://dx.doi.org/10.15802/stp2011/8712.

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Our research offers a new perspective loading pattern of the 12-wheel double-feed freight electric locomotive with the asynchronous tractive motor using an adapter transformer with the high-frequency uncoupler. This will make it possible to decrease the traction-feeding transformer mass 2.3 times, to remove the current pulse advancing on the track circuit and therefore the influence on the work of the ALSE and CBS. So the railway traffic safety will be increased considerably.

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Lakusta, Denys, and Sergey Maliuk. "Development of a functional system for diagnosing the presence of rotor damage in induction traction motors." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies", no. 44 (December 2, 2024): 41–53. https://doi.org/10.32703/2617-9059-2024-44-3.

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The aim of this work is to develop a system for functional diagnostics of rotor bar breakage in induction traction motors of railway rolling stock. In order to achieve this aim, the following tasks have been solved: developed an algorithm for diagnosing the condition of rotor bars based on the statistics of fractional moments; developed a block diagram of the unit for diagnosing the condition of rotor bars of the induction motor based on the statistics of fractional moments; developed a block diagram of the system for functional diagnosis of rotor bars condition as part of the traction motor with direct torque control. The most important result consists in obtaining a mathematical model of fractional moment statistics with less volume of calculations and improved sensitivity of the method. This result was achieved by determining the information-frequency range, which made it possible to analyze not all the spectral components of the analyzed signal, but only that part of it where there may be spectral components typical for the breakage of rotor bars of the induction motor. This approach to diagnosing the condition of rotor bars can also be applied in traction motors of rolling stock with vector control system of induction motors.

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POWELL, A. J., and A. H. WICKENS. "Active Guidance of Railway Vehicles Using Traction Motor Torque Control." Vehicle System Dynamics 25, sup1 (1996): 573–84. http://dx.doi.org/10.1080/00423119608969221.

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MAKISHIMA, Shingo, and Masao NAGAI. "318 Vibration Control of Railway Vehicle by Traction Motor Torques." Proceedings of the Dynamics & Design Conference 2010 (2010): _318–1_—_318–5_. http://dx.doi.org/10.1299/jsmedmc.2010._318-1_.

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Seo, Jung Won, Hyun Mu Hur, Sung Tae Kwon, Jae Boong Choi, and Young Jin Kim. "Effects of Residual Stress and Traction Force on the Contact Fatigue Life of Railway Wheels." Key Engineering Materials 326-328 (December 2006): 1067–70. http://dx.doi.org/10.4028/www.scientific.net/kem.326-328.1067.

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Damage often occurs on the surface of railway wheels due to wheel-rail contact fatigue. Since the wheel failure can cause derailment causing the loss of life and property, it should be removed prior to the wheel failure. The effect of surface removal on contact fatigue life has been investigated by many researchers, however, the effects of residual stress and traction force have not been reported yet. The railway wheel reserves the initial residual stress due to the manufacturing process, and this residual stress is changed by the thermal stress induced by braking. Also, the traction force is usually applied along with residual stress on wheels of locomotive and electric motor vehicle. In this study, the effect of surface removal on the contact fatigue life for a railway wheel has been evaluated by applying the rolling contact fatigue test. Also, the effect of traction force and change of residual stress on the contact fatigue life has been estimated by applying finite element analysis. It is found that the residual stress is a dominant factor determining the surface removal depth as far as the traction coefficient is less than 0.15. If the traction coefficient is greater than 0.2, however, the surface removal depth is observed to be independent on the residual stress.

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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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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 (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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KONDO, Keiichiro, and Koichi MATSUOKA. "Control System of Permanent Magnet Synchronous Motor for Railway Vehicle Traction." Quarterly Report of RTRI 41, no. 2 (2000): 94–99. http://dx.doi.org/10.2219/rtriqr.41.94.

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Kim, J. H., H. C. Ki, S. J. Byun, and J. H. Rho. "DESIGN FOR AERODYNAMIC NOISE REDUCTION OF RAILWAY TRACTION MOTOR USING LBM." Journal of computational fluids engineering 22, no. 1 (2017): 103–9. http://dx.doi.org/10.6112/kscfe.2017.22.1.103.

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MAKISHIMA, Shingo, and Masao NAGAI. "Acceleration Sensorless Vibration Control of Railway Vehicle by Traction Motor Torque." TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78, no. 790 (2012): 1995–2005. http://dx.doi.org/10.1299/kikaic.78.1995.

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Matsuoka, Koichi. "Development trend of the permanent magnet synchronous motor for railway traction." IEEJ Transactions on Electrical and Electronic Engineering 2, no. 2 (2007): 154–61. http://dx.doi.org/10.1002/tee.20121.

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Matsuoka, Koichi. "Development trend of the permanent magnet synchronous motor for railway traction." IEEJ Transactions on Electrical and Electronic Engineering 2, no. 2 (2007): xv—xvi. http://dx.doi.org/10.1002/tee.20132.

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Maznev, Alexander, Anna Kalinina, Alexey Volov, Stanislav Telichenko, and Lev Sapozhnikov. "Improvement of Regulating Properties of DC Electric Trains with Pulse Converters." Proceedings of Petersburg Transport University 19, no. 1 (2022): 75–81. http://dx.doi.org/10.20295/1815-588x-2022-19-1-75-81.

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Purpose: Development of circuit solutions for pulse converters with improved control parameters for DC electric trains with a collector traction drive. Methods: The analysis of semiconductor control systems of DC electric trains is carried out. The calculation of frequency characteristics of the converter at using the parameters of traction motors of ED4M electric train is made. Results: Separated regulation of the currents of the armature and excitation windings makes it possible to realize the stability of braking system with pulse converter and the absence of motor current surges. Practical importance: It is expedient to use the considered circuit solutions on mainline railway electric trains that will allow expanding the speed range in electric braking mode and increasing the energy efficiency of a rolling stock.

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Kuznetsov, G. Yu, E. Yu Loginova, and K. V. Kudelin. "The Use of Electric Energy Storage Devices to Improve Traction Properties of Autonomous Locomotives." World of Transport and Transportation 22, no. 1 (2024): 24–29. https://doi.org/10.30932/1992-3252-2024-22-1-3.

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The analysis of international experience in development of autonomous locomotives with a hybrid power plant allowed to prove the possibility of increasing the operating efficiency of diesel locomotives using electric energy storage devices.A proposed circuit diagram of the power system of a diesel locomotive implies as source of energy both a diesel engine and a traction battery with a DC pulse chopper. An algorithm has been developed to control the traction drive of a diesel locomotive with a hybrid power plant, which ensures an increase in the tractive force of the locomotive on sections with difficult track profile. Modernisation of the power system of a diesel locomotive using a hybrid power plant is considered for the diesel locomotive of 2TE116 series. A mathematical model of operation of a diesel locomotive traction drive powered by a hybrid energy source through a controlled voltage breaker has been developed using the energy balance equations of a traction electric motor. Respective traction properties of 2TE116 diesel locomotive with a standard power plant and a hybrid power plant were calculated using numerical modelling methods in MatLab and LabView software environments. It is shown that, over the entire range of operation speed, a diesel locomotive with a hybrid power plant allows obtaining a tractive effort 15 % higher than a diesel locomotive with a standard power plant. Calculations have proved that increasing the traction properties of the modernised 2TE116 diesel locomotive makes it possible to increase the designated weight of the train by 15 %, and, accordingly, the efficiency of using the locomotive as a traction unit on the railway network.

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Girnik, Andrey S., and Alexander L. Fedyanin. "INVESTIGATION OF ELECTRO-MECHANICAL OVERLOADS OF ELECTRIC LOCOMOTIVES TRACTION ENGINES IN CASE OF OPERATING CONDITIONS VIOLATION." Electrical and data processing facilities and systems 20, no. 1 (2024): 19–33. http://dx.doi.org/10.17122/1999-5458-2024-20-1-19-33.

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In modern railway transport, there are cases of premature failure of traction motors of electric locomotives. The cause of these failures of electrical machines may be the influence of such factors as accelerated aging or breakdown of electrical insulating materials due to electrical overvoltages, the effects of mechanical overloads, violation of operating modes of locomotive equipment under increased loads or untimely switching in the electrical connection circuit of traction motors. Such factors lead to a decrease in the guaranteed service life of traction electric machines and, as a consequence, to their unscheduled repairs with corresponding financial costs. In some cases, locomotive equipment is beyond repair and requires complete replacement. Aim of research To study the influence of switching processes in the electrical connection circuit of traction motors on their possible failure in the event of violation of operating conditions with increased mechanical load and untimely switching of the method of their inclusion in the electrical circuit. Research methods For modeling and analysis of dynamic changes in the mechanical torque and electrical voltages of traction motors during a connection circuit switching, the simulation model has been developed in the MatLab Simulink software environment. Results The influence of changes in the transient electrical resistance of the contact gap of the switching equipment on the operation of the electric locomotive traction motor at a short-term moment of switching the connection circuit in case of violation of the operating conditions of the electric locomotive is considered. Recommendations were proposed to reduce the number of failures of traction motors.

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Gavrilovic, Branislav, and Vladimir Aleksandrovich Baboshin. "Traction drive simulations when starting an electric locomotive series ŽS 444 on the railway tracks of Serbia." Mechanical Engineering Advances 2, no. 2 (2024): 421. http://dx.doi.org/10.59400/mea.v2i2.421.

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The manuscript presents and describes the Model in Matlab-simulink, which allows to display the time change of the firing angle of the thyristor of the single-phase rectifier, the mean value of the voltage, the armature current and the speed of the electric motor during the start-up of the electric locomotive ŽS 444 series for different given mechanically loaded and reference speeds of traction electric motors. The model makes it possible to establish the desired reference speed change ramps for different reference speeds and mechanical loads from +250 rpm, i.e., the maximum current of the electric motor armature up to 1250 A.

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Abouzeid, Ahmed Fathy, Fritz Felix Trimpe, Sönke Lück, Markus Traupe, Juan Manuel Guerrero, and Fernando Briz. "Co-Simulation-Based Verification of Torsional Vibration Protection of Electric-Driven Railway Vehicle Wheelsets." Vibration 5, no. 3 (2022): 613–27. http://dx.doi.org/10.3390/vibration5030036.

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Torsional vibration is an oscillation phenomenon occurring at driven railway vehicle wheelsets. As the resulting dynamic stresses can be significantly larger than the maximum static motor torque, axle and press fit are at risk of failure. To prevent dangerous vibration events and with these, press fit and axle from failure, traction drive manufactures nowadays used to implement vibration suppression algorithms in drive controls. In this paper, the effectiveness of such suppression algorithms is analyzed. Furthermore, as a pilot survey, we analyze to what extend traction controls influence the excitation of torsional vibration.

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Król, Emil, Marcin Maciążek, and Tomasz Wolnik. "Review of Vibroacoustic Analysis Methods of Electric Vehicles Motors." Energies 16, no. 4 (2023): 2041. http://dx.doi.org/10.3390/en16042041.

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The dynamic development of electromobility has resulted in new directions of research, one of which is the analysis of the noise of traction motors. The designs of the motors used in electric vehicles are relatively new and often modified. In addition, strong competition also forces an increase in the power generated per unit mass of the motor, often at the expense of weakening the mechanical structure. This may result in an increase in the noise level generated by the electric drive, so this issue should be analyzed at the motor design stage. Different construction and operating conditions in relation to industrial or railway traction motors make it necessary to constantly develop methods for the noise analysis of the motors for electric vehicles. The aim of this article is to review the methods used so far in an analysis of the noise generated by the motors for electric vehicles. Three main methods are used by the authors of this paper: the analytical method, the hybrid method using two-dimensional models, and the hybrid method using three-dimensional models. In addition to the review of these methods, the paper also focuses on a synthetic summary of the most important factors determining the level and nature of the noise generated by electric vehicle motors.

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Safronov, Oleksandr, Yurii Vodiannikov, Pavlo Khozia, and Anton Mozheiko. "BRAKING EFFICIENCY OF QUARRY TRAINS WITH SIX-BOGIES DUMP CARS OF THE INCREASED AXIAL LOAD UP TO 27.7 TF." Railbound Rolling Stock, no. 23 (December 16, 2021): 111–26. http://dx.doi.org/10.47675/2304-6309-2021-23-111-126.

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Improving the technical level of railway transport of industrial enterprises is expressed in the introduction of advanced types of traction (locomotives and electric locomotives), four and six-axle specialized cars, including self-unloading, automation and telemechanics. To increase the productivity of quarry trains at PJSC "Kryukiv Railway Car Building Plant" a six-axle dump car model 33-7141 for quarry railway transport was designed. The car is designed for transportation from quarries of open cut hard rocks, ore and other bulk and lump cargo with density (1.75-4.0) t/m3, as well as mechanized unloading on dumping sites or crushing units of opencast mining. A distinctive feature of innovative dump cars from typical ones is the increase of cargo weight by 10 t and axial load to 271.6 (27.7) kN (ts). In this regard, the issues of assessing the braking efficiency of a quarry train with innovative dump cars that meet the requirements for railway industrial transport are becoming relevant. The article presents the study results of the braking efficiency of a quarry train composition of 10 and 14 cars. Locomotive TEM7 and unit OPE1AM with one and two motor cars were considered as traction units. The maximum permissible speeds were determined in a given range of slopes of the railway track, and the maximum possible descent was set provided that the braking distance does not exceed or will be equal to 300. As a result of research, it was found that the maximum allowable deviations ranged from 34 ‰ to 38 ‰ depending on the number of cars and traction units. The speed of trains with innovative dump trucks on the site is 42 km/h. Key words: dump car, tipping wagon, maximum slope, permissible speed, braking distance, traction unit.

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Wahyu Wibowo, Ferry. "Analysis of traction motor axle cap repair programs using technology numerical control." International Journal of Engineering & Technology 7, no. 4.44 (2018): 17. http://dx.doi.org/10.14419/ijet.v7i4.44.26855.

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In the process of a product manufacturing has a significant role in low costs of the production. Due to this case, the railway workshop has employed the numerical machine to repair the train component damages. This paper aims at analyzing a repairing program of the GE 761 traction motor axle cap using a technology numerical control (TNC) 355. The TNC itself is included on a category of a numerical control which is a method in operating a manufacturing machine automatically. The numerical data are needed to provide a part that is used by the machine which is known as a part program. The part program is processed by the machine to activate the motors that run the machine. This paper has analyzed 4 programs to repair the axle cap.

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Steczek, Marcin, Piotr Chudzik, and Adam Szeląg. "Application of a Non-carrier-Based Modulation for Current Harmonics Spectrum Control during Regenerative Braking of the Electric Vehicle." Energies 13, no. 24 (2020): 6686. http://dx.doi.org/10.3390/en13246686.

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The regenerative braking of railway vehicles is widely used in DC railway systems all over the world. This mode of operation provides an opportunity to reuse part of the energy consumed by vehicles, and makes the railway system more energy efficient. During regenerative braking, not only energy management is an issue, but also Electromagnetic Compatibility EMC issues, such as interference of generated current harmonics with a railway signaling system. In this paper, the selective harmonic elimination modulation technique (SHE-PWM) was introduced to the traction drive with a three-level inverter to reduce specific catenary current harmonics generated during regenerative braking. The simulation model of a traction drive appropriate for harmonics analysis was proposed and verified by the measurements in the low-power laboratory drive system. The model was re-scaled to the 3 kV DC system for further study. The model of an induction motor with electromotive force and the method of its calculation was proposed. Furthermore, an analysis of the braking chopper operation was carried out. The asymmetric control of braking chopper was proposed to reduce the current harmonics below limits during chopper operation.

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Journal articles on the topic 'Railway traction motor'

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