Journal articles: 'AC traction drive'

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Zong, Jian, Yi Ruan, Ming Hui Chen, and Li Bo Xu. "Study on Narrow-Gauge Traction Locomotive Control System." Advanced Materials Research 418-420 (December 2011): 2074–77. http://dx.doi.org/10.4028/www.scientific.net/amr.418-420.2074.

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Most narrow-gauge vehicles driven by DC motor now, as DC drive due to power constraints and high maintenance costs, most of them will gradually be replaced by AC drives. But VVVF(Variable Voltage Variable Frequency) control method adopt in some running narrow-track traction locomotives, that can reduce over-current with load starting and should be compensated at low frequency. Based on study the Control strategies of narrow-track locomotives, comparing with the characteristics of power distribution of dual-motor drive system. The motor ought to have the same mechanical feature in dual-motor drive system, vector control strategy select in the control system. Experiments prove the system has good performance of stability, reliability, and good control performance, which can meet the narrow-track traction locomotive control requirements.

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Marinin, S. A. "Comparison of the energy efficiency of ac electric freight locomotives with collector and asynchronous traction drive." Herald of the Ural State University of Railway Transport, no. 1 (2022): 57–64. http://dx.doi.org/10.20291/2079-0392-2022-1-57-64.

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Electric locomotives with asynchronous traction drive are operated on the Russian road network in passenger and freight traffic. The advantage of such a drive is a large specific power. At first glance, electricity consumption of an electric locomotive with asynchronous traction drive should be less than that of an electric locomotive with a collector traction drive. The same is declared by manufacturers of traction rolling stock [1, 2]. But the answer to the question which electric locomotive is more economical in freight traffic: with a collector or asynchronous traction drive? - is far from being unambiguous [3, 4, 5]. In order to determine which electric locomotives have the best energy efficiency regarding the traction drive, a comparison of electric energy costs for traction of freight trains by electric locomotives of the VL80S series with collector traction drive, operated in two- and three-section versions, and a promising two-section electric locomotive of the 2ES7 series with asynchronous traction drive was performed. The energy efficiency assessment was carried out using methods based on elements of mathematical statistics and probability theory, including estimation of the distribution parameters of the studied quantities, statistical hypothesis testing and variance analysis. This article presents the main results of the research carried out at the testing area of the Gorky Railway during the pilot operation of the 2ES7 series electric locomotive on the Druzhinino - Vekovka section.

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Dubravin, Y., V. Tkachenko, and O. Spivak. "INCREASING THE ENERGY EFFICIENCY OF THE AC ELECTRIC LOKOMOTIVE TRACTION DRIVE." Collection of scientific works of the State University of Infrastructure and Technologies series "Transport Systems and Technologies" 1, no. 38 (December 24, 2021): 36–52. http://dx.doi.org/10.32703/2617-9040-2021-38-36-4.

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The study of the energy characteristics of the active traction converter with pulse-width modulation as part of the traction electric drive of an AC electric locomotive was held during the research. Active traction converter provides pulse-width control of the collector DC traction motors voltage and belongs to the basic AC / DC circuit. The transient process when switching transistor switches is accompanied by significant voltage surge, due to the scattering inductance reaction of the traction transformer. Studies have shown that the diode discharge buffer circuits do not provide discharge of the electromagnetic energy accumulated in the winding of the transformer. An active traction converter control algorithm has been developed, which implies the use of pulse-width and phase regulation of rectified voltage. Switching of transistor switches occurs in the presence of a parallel current circuit. This creates the conditions for the discharge of electromagnetic energy accumulated in the secondary winding circuit of the traction transformer. The developed mathematical model allows to investigate the electromagnetic processes that occur during the switching of transistor switches and to evaluate the energy efficiency of the electric locomotive with active traction converter. In the simulation process, the influence of active traction converter parameters and control algorithms on the power rate of the converter, the total THD distortion rate of current and voltage and the relative values of the rectified voltage were investigated. Measures to increase the power rate and to reduce the emission level of higher current harmonics into the traction network were proposed.

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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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Biryukov, V. V., Yu A. Fedorova, and M. V. Rozhkova. "Simulation of drive power in mechatronic systems." Journal of Physics: Conference Series 2061, no. 1 (October 1, 2021): 012035. http://dx.doi.org/10.1088/1742-6596/2061/1/012035.

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Abstract The results of research on determining the parameters and circuit solutions of traction drives of funicular cars are presented in this paper. As a result of the research, it has been revealed that the funiculars, the bodies of which have an articulated joint, possess the greatest advantages. It is effectually to use three-phase AC machines with permanent magnets as traction electric motors. The mechanical part of the drive must contain a speed transformer with a gear rack-wheel type gearing. The wheels of the running gears perform the function of holding the car on the track structure. The traction force is performed in a gearing, the rack of which is placed between the rails of the track structure. The given method for calculating the power of the drive motor made it possible without question to determine its dependence on the angle of inclination of the railroad bed.

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B. Balaji and J. D. Anunciya. "Model Predictive Control based Direct Matrix Converter fed Permanent Magnet Synchronous Machine drives for Traction and Electric Mobility Applications." ARAI Journal of Mobility Technology 2, no. 1 (January 15, 2022): 140–51. http://dx.doi.org/10.37285/ajmt.1.1.8.

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There have been extensive research works going on electric mobility but most of these work and the existing electric mobility systems are battery-based DC systems. In some applications of electric mobility like traction and advanced technologies like electromagnetic induction charging, AC fed systems are employed due to the innate qualities of AC power transmission. Almost all the electric mobility systems we use are AC induction or permanent magnet machines. The conventional electric mobility systems including traction having AC as their energy source use two-stage conversion i.e. A fixed AC is converted to a fixed or variable DC link using a rectifier and finally, an inverter provides a variable AC in terms of frequency and magnitude according to the control algorithm. The two-stage conversion has its pros and cons but Matrix Converter (MC) will be a suitable and efficient alternative for AC fed AC motor drives. In the case of traction and other electric mobility applications, the load torque demand plays a significant role. The predictive control technique provides a suitable solution for these kinds of special drive applications due to their selective parameter control ability. Implementation of predictive control using a matrix converter is more effective than the conventional inverter fed drives, owing to the increased viability of matrix converter switching configurations. This paper discusses the mathematical implementation and comparison of Predictive Current Control (PCC) and Predictive Torque Control (PTC) with and without weighing factor for AC fed electric mobility applications. The efficacy of both the model predictive control techniques in concern of execution time, steady-state, transient, and dynamic conditions are analysed and validated along with the influence of diverse control variables in the cost function.

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Goolak, Sergey, Viktor Tkachenko, Gintautas Bureika, and Gediminas Vaičiūnas. "METHOD OF SPECTRAL ANALYSIS OF TRACTION CURRENT OF AC ELECTRIC LOCOMOTIVES." Transport 35, no. 6 (January 21, 2021): 658–68. http://dx.doi.org/10.3846/transport.2020.14242.

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An improved method for spectral analysis of traction current of an Alternating Current (AC) electric locomotive is considered in the article. A new method of spectral analysis considers the change in voltage in the catenary system as a non-deterministic, non-ergodic and non-Gaussian process. It has been established that higher voltage harmonics in the catenary system have a significant negative effect on the operation of non-traction railway consumers of electricity. In addition, electric locomotives operating in the same feeder zone have a mutual influence on each other. Electric railway transport is a source of higher voltage harmonics and strongly distorts the shape of the sinusoidal voltage of the catenary system, which are caused by the higher spectral components of the current in the electric locomotive traction drive circuit. These spectral components of the traction current arise in the traction drive circuit due to the nonlinearity of the current-voltage characteristics of the electronic devices of an electric locomotive, for example, a contact rectifier, a capacitor circuit of traction motors. Reactive power compensators are used in electric locomotives to eliminate components of higher harmonic traction current in the catenary system. Traditionally, spectral analysis in such systems is performed using Fourier methods. However, the determination of the spectral components of the traction current by the Fourier method for constructing a control system for a reactive power compensator is possible only if the process of voltage variation is a deterministic or ergodic Gaussian process. Otherwise, the application of Fourier transform methods will be incorrect. An analysis of the factors that affect voltage changes in the catenary system showed that this process is significantly different from the ergodic Gaussian process. Such factors include the following: the operating mode of the electric locomotives; number and total capacity of electric locomotives in one feeder zone; electric locomotives passing through feeder zones; instability of collection current. Thus, in the case under consideration, the application of the Fourier methods is incorrect for the analysis of the spectral components of the traction current. This affects the quality of compensation of the higher harmonic components of the traction current, and in some cases, the unstable operation of the control system of the active part of the reactive power compensator. Proposed scientific approach is based on the Levinson–Durbin linear prediction algorithm. On the one hand, this allows adapting the control system of the compensator to the voltage parameters of the catenary system. On the other hand, this allows taking into account the operating modes of electric rail vehicle with reactive power compensation. The construction of a compensator control system using the Levinson–Durbin algorithm significantly simplifies thensynchronization scheme of the compensator and power circuits of the traction electric drive of AC electric locomotive. A comparison of the traditional method of spectral analysis, based on the Fast Fourier Transform (FFT), and the method, based on the Levinson–Durbin algorithm, proposed by the authors, showed the high efficiency of the latter.

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Sengamalai, Usha, T. M. Thamizh Thentral, Palanisamy Ramasamy, Mohit Bajaj, Syed Sabir Hussain Bukhari, Ehab E. Elattar, Ahmed Althobaiti, and Salah Kamel. "Mitigation of Circulating Bearing Current in Induction Motor Drive Using Modified ANN Based MRAS for Traction Application." Mathematics 10, no. 8 (April 8, 2022): 1220. http://dx.doi.org/10.3390/math10081220.

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Induction motors are popularly used in various applications because of the proposed modest construction, substantiated process, and limited size of specific power. The traditional AC traction drives are experimentally analyzed. There is a high circulating current due to the high Common-Mode Voltage (CMV). The high Circulating Bearing Current (CBC) is a major problem in conventional two-level voltage source inverter fed parallel-connected sensor-based induction motors for traction applications. A sensorless method is well known for shrinking costs and enhancing the reliability of an induction motor drive. The modified artificial neural network-based model reference adaptive system is designed to realize speed estimation methods for the sensorless drive. Four dissimilar multilevel inverter network topologies are being implemented to reduce CBC in the proposed sensorless traction motor drives. The multilevel inverter types are T-bridge, Neutral Point Clamped Inverter (NPC), cascaded H-bridge, and modified reduced switch topologies. The four methods are compared, and the best method has been identified in terms of 80% less CMV compared to the conventional one. The modified cascaded H-bridge inverter reduces the CBC of the proposed artificial neural network-based parallel connected induction motor; it is 50% compared to the conventional method. The CBC of the modified method is analyzed and associated with the traditional method. Finally, the parallel-connected induction motor traction drive hardware is implemented, and the performance is analyzed.

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Zarifyan, A. A., and N. V. Talakhadze. "Comparative research of electrical energy transformation processes in locomotive traction drives with asynchronous motors and series-wound brushed DC motors." Journal of Physics: Conference Series 2131, no. 4 (December 1, 2021): 042079. http://dx.doi.org/10.1088/1742-6596/2131/4/042079.

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Abstract An estimate of the Russian railways expenses level for the purchase of fuel and energy resources is given. It is shown the costs for the purchase of electric energy for train traction account for more than half of the total costs. In this regard, the problem of increasing the traction rolling stock energy efficiency seems certainly relevant. The diagram of voltage and current measurements at the primary winding of the AC cargo electric locomotive transformer is given. The experimental data processing algorithm is proposed. A comparative analysis of the results obtained for electric locomotives with series-wound brushed DC motors (throughout what follows will be denoted as BTMs) and asynchronous traction motors (will be denoted as ATMs) showed that the power factor of the asynchronous drive is higher: 0.99, compared to 0.65 for the drive with BTMs; and the coefficient of nonlinear current distortions is only 0.15, compared to 0.53 for the BTMs. The conclusion is made about higher efficiency of electric energy conversion process in asynchronous traction drive in trust mode.

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Chen, Yue Dong, and Zhen Hua Xia. "Simulation and Implementation for the Speed Control System of Horizontal Continuous Casting Dragger for Copper." Advanced Materials Research 383-390 (November 2011): 1696–700. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.1696.

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The levels of continuous casting process of copper and copper alloy billet have many advantages, such as taking small footprint, low investment and the shorter flow. Recently, it develops very quickly all over the world. This article designs the dummy body drive control system based on the DSP digital signal processing chips, inverter and variable speed induction motor, and uses the unique process that space vector pulse width modulation strategy can achieve continuous casting horizontal tractor’s four beats to realize continuous casting process’ high-quality, stable and reliable implementation. Early in the 19th century, German Bismarck had proposed a continuous casting process in his patent. The development of this method in the copper industry began in 1940s, the type of equipment went through belt type, vibration mold, vertical traction type, tilt casting type and Horizontal traction type [1, 2]. Now, horizontal traction, as the most popular method abroad, because its products don’t need straightening, and consistency of properties along the length and high density of grain lead to the improvements of mechanical properties and electrical properties, its superiority in product quality and production efficiency is obvious. The design combined the modern AC variable speed control and advanced SCM control technology and traction continuous casting process to design a Speed controller of horizontal continuous casting of copper traction motor, its performance is similar with to dummy industrial control computer and AC servo motor drive control system, but the configuration of the hardware is less than half the price.

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Yakushev, Aleksey, and Ekaterina Oparina. "The study of electromagnetic processes in electric traction drive of AC locomotive." Bulletin of scientific research results, no. 4 (2019): 53–68. http://dx.doi.org/10.20295/2223-9987-2019-4-53-68.

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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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TAKAHARA, EIMEI. "Technological Trend of AC Traction Drive System for Railway Vehicles. 2. Power Electronics and Railway Traction Control Strategy." Journal of the Institute of Electrical Engineers of Japan 122, no. 9 (2002): 601–5. http://dx.doi.org/10.1541/ieejjournal.122.601.

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Orlov, Yu A. "Control of traction drive with motors with independent excitation in AC electric locomotives." Russian Electrical Engineering 81, no. 3 (March 2010): 138–41. http://dx.doi.org/10.3103/s1068371210030065.

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Szelag, Adam, Tadeusz Maciolek, and Marek Patoka. "Effectiveness of filters in 3 kV DC railway traction substations supplied by distorted voltage- measurements and diagnostics." ACTA IMEKO 4, no. 2 (June 29, 2015): 72. http://dx.doi.org/10.21014/acta_imeko.v4i2.232.

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Electric energy quality criteria relating to a DC supply system concern the circuits from the rectifiers installed in traction substations till the vehicle's current collector. Energy Law and related implementing provisions unequivocally state that an electrified transport system as the energy recipient shall fulfil the requirements regarding energy consumption, which are defined in the agreement. It imposes certain requirements for the railway power supply company. Introduction into traffic of the traction vehicles that are equipped with converter power electronics drive systems increased requirements regarding voltage quality in a DC catenary. At the same time, increase in share of non-linear recipients causes the increase of distortion in AC voltage supplying traction substations, and they also transfer to the DC side. Both these factors caused a change in operational conditions of the resonance smoothing filters hitherto used in rectifier traction substations supplied by AC medium voltage power lines. This paper presents a research and a case study of the problem of effectiveness of functioning of the used filters, from measurements allowing for problem identification to results of the studies of the proposed new solution of a filter and the results of observed exploitation of a prototype with the application of digital monitoring and diagnostics system.

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Ftorek, Branislav, Ján Šimon, Michail Kiselev, Vladimír Vavrúš, and Ján Vittek. "Exploitation of Energy Optimal and Near-Optimal Control for Traction Drives with AC Motors." Symmetry 14, no. 12 (December 9, 2022): 2613. http://dx.doi.org/10.3390/sym14122613.

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The main contribution of this paper is the verification of a new train control system applied to the drive with a.c. motors that is energy near optimal with respect to electrical and mechanical energy minimization. All simulations are related to the one traction motor yielding its best exploitation. Load torque treated as a state variable consists of constant, linear, and quadratic components as a function of rotor speed. The required performance of the energy-saving control is rendered straightforward using precomputed energy optimal state variables or a prediction of losses for a symmetrical trapezoidal speed profile as the second alternative. An energy-saving reference position generator provides the state variables, which are faithfully followed by a feedback control based on field orientation, which is completed with a matched zero dynamic lag pre-compensator yielding prescribed closed-loop dynamics. Simulation results mutually compared confirm the capability of an overall drive control system to follow generated state variables for two different service conditions and the possibility of energy savings.

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Mašek, Zdeněk, Jaroslav Novák, Ondřej Sadílek, and Tomáš Lelek. "Control of Diesel-electric AC/DC Traction Drive of Motor Truck WŽB 10.1-M." Transactions on Electrical Engineering 6, no. 3 (2017): 77–83. http://dx.doi.org/10.14311/tee.2017.3.077.

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Kuznetsov, Valeriy, Borys Lyubarskyi, Ewa Kardas-Cinal, Bagish Yeritsyan, Ievgen Riabov, and Ivan Rubanik. "Recommendations for the selection of parameters for shunting locomotives." Archives of Transport 56, no. 4 (December 30, 2020): 119–33. http://dx.doi.org/10.5604/01.3001.0014.5650.

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Shunting is an integral part of the partial process. In 1520 mm gauge countries, shunting operations are performed by outdated locomotives, which are being replaced by modern models; the technical parameters best match the conditions of the shunting work performed. The article analyzes recommendations for the selection of parameters of shunting locomotives and the actual indicators of their work. On the basis of this analysis, a requirement was made on the necessity of compulsory consideration of the operating conditions of the locomotive when determining its technical characteristics. As the main technical parameters of shunting locomotives, the tractive power and starting tractive force are taken and their influence on the duration of an elementary shunting movement of the "acceleration-deceleration" type is investigated. This approach advises the regulatory documentation for the organization of shunting work. Tha developed mathematical model allows to carry out research on the influence of tractive power and starting tractive force on the time of acceleration and deceleration. Calculations of the time of the train's acceleration are carried out with varying their mass and the slope of the track at different values of the tractive power starting tractive force. The calculations were carried out for the mass of compositions 1000...5000 Mg for the profile slopes equal to 0 and 1.5 ‰. The speed of the finish of acceleration was taken equal to 15 and 25 km/h. The thrust starting tractive force varied in the range of 150...300 kN, the tractive power - 200 ... 1100 kW. According to the results of calculations, it was found that the reduction in the duration of the elementary shunting movement is more significantly affected by the power of the locomotive than by the starting traction force. The “saturation” effect was noted, in which a significant increase in power or traction force during starting does not cause a significant reduction in the acceleration time. In this regard, for shunting locomotives with AC traction drive, it is recommended to take a pulling force of an equal continuous traction force.

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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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Korshunov, G. I., E. G. Semenova, A. A. Petrushevskaya, and M. S. Smirnova. "DESIGN AND MANUFACTURE OF ELECTRONIC TECHNICAL MEANS OF AUTOMATION FOR ELECTRIC DRIVE IN CONDITIONS OF DIGITAL DEVELOPMENT." Issues of radio electronics, no. 10 (October 20, 2018): 44–49. http://dx.doi.org/10.21778/2218-5453-2018-10-44-49.

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The main stages of the life cycle of electronic technical means of automation of an electric drive from the point of view of completeness of introduction of digital technologies are considered. A brief analysis of models, methods and tools is performed to achieve the effectiveness of the end-to-end digital process of development and production of programmable controllers for the electric drive. The approaches for variants formation of the basic structure of the controller, the creation of a digital model (prototype) of the controller, the provision of design taking into account the technology, the improvement of the installation of printed circuit boards on the automatic line in accordance with the concept of Industry 4.0, functional control, diagnostics and testing are proposed. The step by step continuity implement of the primary digital model is suggested. The presented material is confirmed by examples of creation of programmable controllers for complete devices of AC drives used in walking excavators, crawler excavators and traction electric drives for BelAZ dump trucks.

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Xingzhi, Hu. "Anti–Drag Braking Control Technology for Electric Drive Dump Truc." Electrotehnica, Electronica, Automatica 69, no. 1 (February 15, 2021): 30–36. http://dx.doi.org/10.46904/eea.21.69.1.1108004.

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The power transmission system of electric wheel vehicle with "Power generator - diode rectifier - inverter - traction motor" can achieve part of the braking energy recycling and reduce fuel consumption through the reverse flow of energy in the downhill braking conditions. For AC - DC - AC transmission system of electric wheel vehicles. In order to achieve the engine anti-drag starting smoothly through the introduction of the theory of Engine Anti - drag Braking and the observation of the rotor frequency by external speed sensor, in addition to that zero-crossing detection phase method to achieve the stator rotating magnetic field and rotor speed synchronization purposes. Through use the rectifier inverter module to achieve energy bi-directional transmission and to achieve engine anti-drag when the vehicle goes downhill slowly. In the article, design of engine brake anti-drag control system and the establishment of anti-drag brake power calculation mathematical model, also build the anti-drag test platform of the engine to verify the control system. The experimental results show that the proposed control scheme for the start of the inverter is simple and reliable, which provides the theoretical basis and experimental data for the actual vehicle design.

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KONDO, KEIICHIRO. "Technological Trend of AC Traction Drive System for Railway Vehicles. 3. An Application of Speed Sensorless Control to Railway Vehicle Traction System." Journal of the Institute of Electrical Engineers of Japan 122, no. 9 (2002): 606–9. http://dx.doi.org/10.1541/ieejjournal.122.606.

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Goolak, S., Ie Riabov, V. Tkachenko, S. Sapronova, and I. Rubanik. "Model of pulsating current traction motor taking into consideration magnetic losses in steel." Electrical Engineering & Electromechanics, no. 6 (December 3, 2021): 11–17. http://dx.doi.org/10.20998/2074-272x.2021.6.02.

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

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Pan, Liwen, and Chengning Zhang. "A High Power Density Integrated Charger for Electric Vehicles with Active Ripple Compensation." Mathematical Problems in Engineering 2015 (2015): 1–18. http://dx.doi.org/10.1155/2015/918296.

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This paper suggests a high power density on-board integrated charger with active ripple compensation circuit for electric vehicles. To obtain a high power density and high efficiency, silicon carbide devices are reported to meet the requirement of high-switching-frequency operation. An integrated bidirectional converter is proposed to function as AC/DC battery charger and to transfer energy between battery pack and motor drive of the traction system. In addition, the conventional H-bridge circuit suffers from ripple power pulsating at second-order line frequency, and a scheme of active ripple compensation circuit has been explored to solve this second-order ripple problem, in which a pair of power switches shared traction mode, a ripple energy storage capacitor, and an energy transfer inductor. Simulation results in MATLAB/Simulink validated the eligibility of the proposed topology. The integrated charger can work as a 70 kW motor drive circuit or a converter with an active ripple compensation circuit for 3 kW charging the battery. The impact of the proposed topology and control strategy on the integrated charger power losses, efficiency, power density, and thermal performance has also been analysed and simulated.

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Ghaderi, Ahmad, Takaji Umeno, and Masaru Sugai. "An Altered PWM Scheme for Single-Mode Seamless Control of AC Traction Motors for Electric Drive Vehicles." IEEE Transactions on Industrial Electronics 63, no. 3 (March 2016): 1385–94. http://dx.doi.org/10.1109/tie.2015.2498901.

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Hvorost, М., and R. Voronov. "RESEARCH OF SCALAR CONTROL SYSTEM OF TWO TRACTION INDUCTION MOTORS FROM BY ONE INVERTER." Municipal economy of cities 1, no. 154 (April 3, 2020): 33–40. http://dx.doi.org/10.33042/2522-1809-2020-1-154-33-40.

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Most adjustable-speed AC drive systems are constructed in such a way that one motor receives power from one inverter and uses vector control as the basic control principle. However, in some cases there is a need to power several motors in parallel from a single inverter, that minimizes the size, weight and cost of such a system. The most common examples of such systems are rail and urban electric vehicles, where two to four induction motors are connected to drive in parallel. Control of such a system is a difficult task, especially in conditions of unbalanced loads on the motors, that can occur in conditions of different adhesion of wheels with rails. The inability to provide individual control of the motor when powered by a single inverter can lead to a decrease in the safety level of such a vehicle due to the loss of stability when changing the current value of the adhesion coefficient of individual wheel pairs. Mechanical processes in the traction system are analyzed, in which each wheel pair is driven by a separate motor powered by a common inverter. It is shown that the identity of the values of the adhesion coefficients is an important condition for the stability of such a system, that cannot be guaranteed in the actual practice of the operation of the vehicle. Therefore, the development and research of control systems that are capable of operating the system in a variety of rail / road conditions is an important direction for the further development of such systems. The structure of mathematical model of traction electromechanical system consisting of two induction motors powered by one inverter is proposed. The adjustable-speed control is based on the scalar control system, that is the easiest to implement because it does not require the estimation of the state variables of the system components. Sinusoidal pulse width modulation is selected as the switch control signal method. Operation of traction electromechanical system with scalar frequency control law is investigated by mathematical modeling. It has been proven that changing the characteristics of a single wheel pair's adhesion can lead to a loss of stability by a system that is unacceptable in terms of providing a comfortable and safe operation of the vehicle. Keywords: traction electric drive, scalar control, adhesion, mathematical model, frequency control

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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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Troitsky, P. S. "Applicability of Gas Turbine Traction in High-Speed Rail Projects in Russia." World of Transport and Transportation 19, no. 6 (July 23, 2022): 26–30. http://dx.doi.org/10.30932/1992-3252-2021-19-6-4.

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Recently, the issue of advisability of building dedicated highspeed railways (HSR) in Russia for transportation of passengers and goods has often been raised in the scientific and industry environment. The key risk of such large-scale investment projects is a significant or rather long payback period due to the lower population density in the areas of the proposed HSR compared to, for example, China. In addition, when planning such capitalintensive and resource-intensive investments, it is necessary to consider plans for development of other modes of transport, namely, express highways, air traffic, as direct competitors to speed and high-speed railways.A way to increase the competitiveness of HSR may be to reduce capital costs during the construction. The creation of HSR, where multiple-unit trains powered by gas turbine engines (GTE) and using AC-AC electric drive, will allow to renounce investments in expensive design, construction, and subsequent maintenance of energy facilities, specialised HSR catenary, which will ensure reduction in the cost of HSR projects, in construction time, and accelerated payback of railways.The article describes the advantages of operating gas turbine traction on speed and high-speed railway lines. The possible structure and layout of such trains are shown. The risks of operation of rolling stock powered by GTE are considered as well as the ways to neutralise them. The objective of the study was to identify the comparative advantages of multiple unit trains powered by GTE compared to high-speed electric trains. The study used methods of comparative analysis, content analysis of technical information, and ranking. It is concluded that introduction of GTE will reduce the investment and operating costs of speed and high-speed railways while maintaining the power and dynamic characteristics of trains.

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Aisyah, Nabilah, Maaspaliza Azri, Auzani Jidin, M. Z. Aihsan, and MHN Talib. "A New Optimal DTC Switching Strategy for Open-End Windings Induction Machine using Dual Inverter." International Journal of Power Electronics and Drive Systems (IJPEDS) 12, no. 3 (September 1, 2021): 1405. http://dx.doi.org/10.11591/ijpeds.v12.i3.pp1405-1412.

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<span>Since the early 1980s, fast torque dynamic control has been a subject of research in AC drives. To achieve superior torque dynamic control, two major techniques are used, namely Field Oriented Control (FOC) and Direct Torque Control (DTC), spurred on by rapid advances in embedded computing systems. Both approaches employ the space vector modulation (SVM) technique to perform the voltage source inverter into over modulation region for producing the fastest torque dynamic response. However, the motor current tends to increase beyond its limit (which can damage the power switches) during the torque dynamic condition, due to inappropriate flux level (i.e. at rated stator flux). Moreover, the torque dynamic response will be slower, particularly at high speed operations since the increase of stator flux will produce negative torque slopes more often. The proposed research aims to formulate an optimal switching modulator and produce the fastest torque dynamic response. In formulating the optimal switching modulator, the effects of selecting different voltage vectors on torque dynamic responses will be investigated. With greater number of voltage vectors offered in dual inverters, the identification of the most optimal voltage vectors for producing the fastest torque dynamic responses will be carried out based on the investigation. The main benefit of the proposed strategy is that it provides superior fast torque dynamic response which is the main requirements for many AC drive applications, e.g. traction drives, electric transportations and vehicles.</span>

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SONE, SATORU. "Technological Trend of AC Traction Drive System for Railway Vehicles. 1. General Remarks. Have We Obtained Ultimate Dribing System?" Journal of the Institute of Electrical Engineers of Japan 122, no. 9 (2002): 598–600. http://dx.doi.org/10.1541/ieejjournal.122.598.

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Choudhury, Abhijit, Pragasen Pillay, and Sheldon S. Williamson. "A Hybrid PWM-Based DC-Link Voltage Balancing Algorithm for a Three-Level NPC DC/AC Traction Inverter Drive." IEEE Journal of Emerging and Selected Topics in Power Electronics 3, no. 3 (September 2015): 805–16. http://dx.doi.org/10.1109/jestpe.2015.2439296.

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32

Liudvinavičius, Lionginas, and Gintautas Bureika. "THEORETICAL AND PRACTICAL PERSPECTIVES OF DIESEL LOCOMOTIVE WITH DC TRACTION MOTORS WHEEL-SETS’ SLIPPING AND SLIDING CONTROL." TRANSPORT 26, no. 4 (January 9, 2012): 335–43. http://dx.doi.org/10.3846/16484142.2011.633339.

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The causes of slipping and sliding of the locomotive's driving wheel-sets are analysed from theoretical and practical perspectives. The main factors influencing wheel-sets’ slipping are described, and their correlation is determined. The specific methods of stopping the slipping of the Diesel locomotives and having a conventional electric drive system are described in the paper. The process of wheel-sets’ slipping and its control are simulated and shown graphically. Structural diagrams demonstrating the control of the dynamic locomotive wheel-sets’ slipping and sliding, based on the evaluation of the influence of the speed-torque characteristics of DC traction motors on these processes, are presented. Major parameters of the DC/DC and AC/DC systems used in the automatic control of the dynamic slipping and sliding of the locomotive's wheel-sets are defined and new methods of controlling the dynamic slipping and sliding are suggested.

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IIDA, HIDEKI. "Technological Trend of AC Traction Drive System for Railway Vehicles. 4. Pure Electric Braking and Train Automatic Stop Position Control." Journal of the Institute of Electrical Engineers of Japan 122, no. 9 (2002): 610–12. http://dx.doi.org/10.1541/ieejjournal.122.610.

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34

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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35

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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36

Ammar, Abdelkarim. "Performance improvement of direct torque control for induction motor drive via fuzzy logic-feedback linearization." COMPEL - The international journal for computation and mathematics in electrical and electronic engineering 38, no. 2 (March 4, 2019): 672–92. http://dx.doi.org/10.1108/compel-04-2018-0183.

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Purpose This paper aims to propose an improved direct torque control (DTC) for the induction motor’s performance enhancement using dual nonlinear techniques. The exact feedback linearization is implemented to create a linear decoupled control. Besides, the fuzzy logic control approach has been inserted to generate the auxiliary control input for the feedback linearization controller. Design/methodology/approach To improve the DTC for induction motor drive, this work suggests the incorporation of two nonlinear approaches. As the classical feedback linearization suffers while the presence of uncertainties and modeling inaccuracy, it is recommended to be associated to another robust control approach to compensate the uncertainties of the model and make a robust control versus the variations of the machine parameters. Therefore, fuzzy logic controllers will be integrated as auxiliary inputs to the feedback linearization control law. Findings The simulation and the experimental validation of the proposed control algorithm show that the association of dual techniques can effectively achieve high dynamic behavior and improve the robustness against parameters variation and external disturbances. Moreover, the space vector modulation is used to preserve a fixed switching frequency, reduce ripples and low switching losses. Practical implications The theoretical, simulation and experimental studies prove that the proposed control algorithm can be used on different AC machines for variable speed drive applications such as oil drilling, traction systems and wind energy conversion systems. Originality/value The proposed DTC strategy has been developed theoretically and realized through simulation and experimental implementation. Different operation conditions have been conducted to check the ability and robustness of the control strategy, such as steady state, speed reversal maneuver, low-speed operation and parameters variation test with load application.

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37

WATANABE, TOMOKI. "Technological Trend of AC Traction Drive System for Railway Vehicles. 5. Intarnal and External History of Anti-Slip/Slide Readhesion Control Study and Its Trend." Journal of the Institute of Electrical Engineers of Japan 122, no. 9 (2002): 613–17. http://dx.doi.org/10.1541/ieejjournal.122.613.

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38

Wasko, Curtis R. "AC Drives in Traction Applications." IEEE Transactions on Industry Applications IA-22, no. 5 (September 1986): 842–46. http://dx.doi.org/10.1109/tia.1986.4504802.

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39

Frederick, L., and Gopal K. Dubey. "AC motor traction drives — A status review." Sadhana 22, no. 6 (December 1997): 855–69. http://dx.doi.org/10.1007/bf02745849.

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40

Karvinen, J. "Three-phase AC traction drives: design and service experience." IEE Proceedings B Electric Power Applications 134, no. 3 (1987): 135. http://dx.doi.org/10.1049/ip-b.1987.0022.

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41

Ruban, М., and B. Baka. "Formation and development of main-line electric locomotive engineering in independed Ukraine (1991 – 2008)." Studies in history and philosophy of science and technology 29, no. 1 (February 8, 2021): 105–12. http://dx.doi.org/10.15421/272013.

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The Ukrainian transport engineering industry has a deep historical tradition that goes back to the activities of the Odesa railway workshops and the establishment of specialized locomotives in Kharkiv and Lugansk. The electric locomotives industry in Ukraine is represented by the products of the Dnipro plant, which for a long time produced electric locomotives of a purely industrial purpose. In the early 1990s, to upgrade the locomotive fleet of Ukrainian railways in the absence of foreign exchange funds for the purchase of traction rolling stock abroad, the management of Ukrzaliznytsia, together with the line ministries, decided to provide the organization of the main-line electric locomotives based on the Dnipro plant. During the implementation of the state program of mainline electric locomotives construction, the Dnepropetrovsk plant developed, and subsequently implemented, projects of a freight DC electric locomotive DE1, an AC cargo and passenger electric locomotive DS3, and also based on DS3 began technical research on a two-system electric locomotive with an asynchronous drive DS4. The Dnipro electric locomotive engineering plant, with its powerful scientific and production potential and clear development strategy, carried out the development and created the next generation's main electric locomotives to meet the needs of Ukrainian railways with modern electric transport. Unfortunately, due to the traditional lack of funding and lobbying on the part of Russian machine-building enterprises, the Dnieper electric locomotives have not become the main locomotives of Ukrainian railways. Unfortunately, due to the economic-financial crisis of 2008, all the prospective achievements of the said enterprise were virtually offset and the plant itself was in a difficult position. However, it is clear that the historical experience of becoming a Ukrainian scientific and production base of railway engineering needs to be properly considered. The proposed study does not deplete the raised problem in the field of the Dnipro electric locomotive plant`s activities, but only provides a general analysis and factual basis for further, more detailed review of the maintenance and development of national railway engineering in independent Ukraine, leaving considerable space for further scientific research.

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42

Bertini, S., T. Ghiara, and M. Marchesoni. "AC/DC/AC high voltage traction drives with quasi-zero reactive power demand." IEEE Transactions on Power Electronics 8, no. 4 (October 1993): 632–39. http://dx.doi.org/10.1109/63.261036.

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43

Liu, Sheng, Ye Tian, William JT Daniel, and Paul A. Meehan. "Dynamic response of a locomotive with AC electric drives to changes in friction conditions." Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit 231, no. 1 (August 5, 2016): 90–103. http://dx.doi.org/10.1177/0954409715620535.

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Locomotive traction control behaviour and its dynamic impacts on rails and vehicles have not been comprehensively investigated in respect to transient conditions. Such transient traction behaviour could be more significant than steady state behaviour in determining dynamic traction performance and track degradation (i.e. squat/corrugation formation, etc.). In order to study this effect, detailed numerical simulations are performed to investigate a locomotive’s dynamic response to a change in contact conditions. In particular, creep response, vibration of the locomotive, and dynamic normal and traction forces are determined using a developed full-scale dynamics model of a locomotive. The model includes a detailed representation of the AC motor dynamics, which has not been considered in previous works. The results show that the detailed model is capable of simulating the dynamic fluctuations in creep and traction forces that are not considered in simpler models. Such transient responses may cause damage to the track and vehicle components.

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44

Bouscayrol, Alain, Maria Pietrzak-David, Phillipe Delarue, Rosendo Pena-Eguiluz, Paul-Etienne Vidal, and Xavier Kestelyn. "Weighted Control of Traction Drives With Parallel-Connected AC Machines." IEEE Transactions on Industrial Electronics 53, no. 6 (December 2006): 1799–806. http://dx.doi.org/10.1109/tie.2006.885106.

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45

Ishikawa, Sakae, Shigeru Tanaka, Susumu Tadakuma, and Eimei Takahara. "Consideration on high quality AC traction motor drives using PWM converters." IEEJ Transactions on Industry Applications 107, no. 3 (1987): 304–11. http://dx.doi.org/10.1541/ieejias.107.304.

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Kulworawanichpong, T., and C. J. Goodman. "Optimal area control of AC railway systems via PWM traction drives." IEE Proceedings - Electric Power Applications 152, no. 1 (2005): 33. http://dx.doi.org/10.1049/ip-epa:20040979.

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Dobrucký, Branislav, Slavomír Kaščák, Michal Praženica, and Peter Drgoňa. "Modeling and simulation of charging and braking regimes of AC/AC powertrain of HEV vehicle." AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 19, no. 12 (December 31, 2018): 751–54. http://dx.doi.org/10.24136/atest.2018.491.

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The paper deals with modeling and simulation of chosen operational modes of HEV vehicle with direct AC/AC transfer and five-phase IM traction motors. Such configuration yields smaller voltage drops com-pared with the serial AC/DC/AC converter and five-phase machines offer some inherent advantages over their three-phase counterparts. The advantages include reduced electromagnetic torque pulsation and also noise characteristics of the five-phase drives are better when compared with the three-phase ones. Charging and braking regimes were chosen as possible operational modes for modeling and analyses. The result of the simulation. carried out with using of Matlab/Simulink are given in the paper.

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Taufiq, J. A., B. Mellitt, and C. J. Goodman. "Novel algorithm for generating near optimal PWM waveforms for AC traction drives." IEE Proceedings B Electric Power Applications 133, no. 2 (1986): 85. http://dx.doi.org/10.1049/ip-b.1986.0013.

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Jeong, Hojin, and Jeihoon Baek. "Design of Three-Phase V-Shaped Interior Permanent Magnet Synchronous Motor for Air Conditioning Compressor of Electric Vehicle." Applied Sciences 10, no. 24 (December 8, 2020): 8785. http://dx.doi.org/10.3390/app10248785.

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Air conditioning system of electric vehicles has new change as the internal combustion engine is being replaced with electrified AC motor. With large amount of batteries installed at the bottom of frame, the conventional compressor, which is belt-driven, can be removed, and another AC motor can play the role for air conditioning in electric vehicles. From this change, the system efficiency would be improved since it is possible to control the electrified compressor independently from traction system in contrast with the belt-driven compressor. As a result, by applying the electrified compressor for air conditioning system, the whole system can achieve better efficiency and longer driving distance, which is most important in electric vehicles. In this paper, 3-phase interior permanent magnet synchronous motor (IPMSM) was designed using lumped-parameter model and finite element method.

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Pradipta, Andri, Santi Triwijaya, Willy Artha Wirawan, Febri Pandu Wijaya, and Pegah Hamedani. "Harmonic Analysis of A DC Railway Traction with Uncontrolled 12 Pulse Rectifier." Journal of Railway Transportation and Technology 1, no. 2 (November 29, 2022): 46–57. http://dx.doi.org/10.37367/jrtt.v1i2.15.

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In the topology of the DC traction substation there is a rectifier component which generally uses a 12 pulse rectifier type and the load is in the form of a trainset with a component in the form of a converter used for variable speed drives (VSD). The operation of the rectifier and the VSD converter load causes harmonics to appear on the AC input side, so anticipation needs to be done. Therefore, it is necessary to conduct an assessment related to DC traction substations to obtain good electrical power quality. The purpose of this study was to determine the electric power quality parameters of DC railway traction using a 12 pulse rectifier and a VSD converter load. This research was conducted by simulating a DC railway traction model with a 12 pulse rectifier and knowing the comparison of the system power quality between the VSD converter load and the resistive load as the basic reference for the traction substation work system of this model. System modeling is done using PSIM software. The results of the simulation are the parameters of the stability of the voltage, current, and system harmonics.

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Journal articles on the topic 'AC traction drive'

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