SEARCH FOR WAYS TO IMPROVE THE TRACTION PROPERTIES OF LOCOMOTIVES AND TRACTION DRIVE DESIGN

2021 ◽  
pp. 48-59
Author(s):  
Vladimir Vorob'ev ◽  
Aleksandr Pugachev ◽  
Oleg Izmerov ◽  
Evgeniy Nikolaev
Keyword(s):  
Pulse Width ◽  
Field Experiments ◽  
Pulse Width Modulation ◽  
Asynchronous Motor ◽  
Rolling Stock ◽  
Diesel Locomotive ◽  
Design Work ◽  
Traction Drive ◽  
Traction Motors ◽  
Traction Drives

The work objective is to increase the traction properties of locomotives without the use of traction drives with asynchronous traction motors and pulse width modulation. Research methods: methods of physical and field experiments, analytical methods for calculating the dynamics of the rolling stock. Conclusion: based on the conducted research, it is proposed to perform a promising diesel locomotive in the form of two sections on three two-axle bogies and a booster on two two-axle bogies, as well as to carry out experimental design work to develop an arc-type stator asynchronous motor and traction drives of a diesel locomotive using it.

TRACTION DRIVE OF LOCOMOTIVES WITH HIGH MOMENTUM COLLECTOR TRACTION ELECTRIC MOTOR

2021 ◽  
Vol 2 ◽  
pp. 118-129
Author(s):  
O.V. DOROFEEV ◽  
V.I. VOROBYEV ◽  
M.I. BORZENKOV ◽  
O.V. IZMEROV ◽  
S.N. ZLOBIN
Keyword(s):  
Traction Force ◽  
Optimal Solution ◽  
Practical Implementation ◽  
Traction Drive ◽  
Traction Motors ◽  
Utility Models ◽  
High Torque ◽  
Traction Drives ◽  
Technical Solutions ◽  
Traction Electric Motor

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

scholarly journals Modeling and analysis of vector control systems for asynchronous motor

2020 ◽  
Vol 178 ◽  
pp. 01001 ◽  
Author(s):  
Viktor Meshcheryakov ◽  
Tatyana Sinyukova ◽  
Alexey Sinyukov ◽  
Andrei Boikov ◽  
Rustem Mukhametzhanov
Keyword(s):  
Vector Control ◽  
Control Systems ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Asynchronous Motor ◽  
Evaluation Criteria ◽  
Torque Ripple ◽  
Modulation Method ◽  
Asynchronous Electric Drive ◽  
Vector Systems

The study aims at the analysis of vector control asynchronous electric drive systems. For comparison and evaluation, mathematical models of systems are implemented in the environment of simulation modeling Matlab Simulink. The evaluation criteria selected were: complexity of implementation, energy efficiency of the inverter, accuracy of speed maintenance, torque ripple, reaction speed of the system to disturbances from the side of the drive mechanism, impact on the supply network. Vector control systems by ensuring the maintenance of accuracy of the moment in the entire range of speed control are more widespread. The study of vector systems, the formation of the stator voltage vector in which is carried out using pulse-width modulation. The signal organization during the study was carried out by several methods. At the initial stage, the signal was formed due to relay-vector control in a closed loop for monitoring the instantaneous values of current errors without forced modulation; at the next stage of the study, the signal was generated using sinusoidal pulse-width modulation based on a comparison of control signals with some reference vector, the final stage became a spatial-vector modulation method.

Problems of development of traction drives with brushless traction motors for passenger electric locomotives

2020 ◽  
pp. 20-25
Author(s):  
Andrey Sergeevich Kosmodamianskiy ◽  
◽  
Vladimir Ivanovich Vorobyev ◽  
Mikhail Yuryevich Kapustin ◽  
Oleg Vasilyevich Izmerov ◽  
...  
Keyword(s):  
Magnetic Flux ◽  
Rotation Frequency ◽  
Axial Direction ◽  
Traction Drive ◽  
Traction Motors ◽  
Adaptability To Manufacture ◽  
Traction Drives ◽  
Conducting Research ◽  
The One ◽  
Electric Traction

The paper considers a problem of creation of new traction drives with brushless electric traction motors (ETM) for passenger locomotives. Analysis of drive designs revealed that the increase of power of induction motors through the increase of rotation frequency leads to the contradiction between requirements for the design reliability, on the one hand, and requirements for technological simplicity, on the other hand. In order to solve the contradiction it is necessary to use ETM designs that have enhanced torque and minimal dimensions in axial direction. It is established that ETM with disk rotor (axial magnetic flux) satisfy such requirements. The authors proposed an aggregate scheme of support-frame traction drives that include ETM with disk rotor, which allows significantly increasing the adaptability to manufacture and repairability of drive at preservation of reliability. As a result, the authors made a conclusion about the reasonability of conducting research and development work on creation of locomotive ETM with axial magnetic flux. The authors have submitted an application for a patent on the proposed design of traction drive.

Methodology for analyzing reliability of the equipment of electric locomotives 2ES10

2021 ◽  
pp. 28-39
Author(s):  
A. A. Vorobyov ◽  
◽  
R. S. Smetanin ◽  
Keyword(s):  
Preventive Maintenance ◽  
Rolling Stock ◽  
Careful Monitoring ◽  
Traction Drive ◽  
Pareto Analysis ◽  
Traction Motors ◽  
Transportation Process ◽  
Equipment Failures ◽  
Operational Failures ◽  
Repair Cycle

The article deals with the analysis of reliability of the equipment of 2ES10 electric locomotives with asynchronous traction motors as a complex system and equipment failures that are often encountered during operation. All submitted failures are divided by type of equipment. Based on the Pareto analysis, the main limiting units of these electric locomotives with the lowest reliability are determined. Based on the Pareto analysis, the frequently failing elements of the main limiting components are determined, which are the mechanical part, wheel pairs, brake equipment, traction drive and traction motors. These elements have a major impact on the safety of train traffic and therefore it is extremely important to constantly assess the condition of these elements. Attention is focused on the analysis of risks associated with the possible formation of operational failures, the system of planned preventive maintenance, methods and tools for assessing reliability, incorrect regulatory and documentation support and fixing operational defects, and their subsequent processing. Such a study makes it possible to improve the safety of the transportation process by careful monitoring of the most vulnerable areas of the rolling stock. This reveals the prefailure state before it occurs. The results of the study can be used as a basis for adjusting the current structure of the repair cycle in terms of reducing inter-repair runs.

The Research of Improved Scheme for Asynchronous Motor Direct Torque Control

2012 ◽  
Vol 466-467 ◽  
pp. 819-823
Author(s):  
Di Chen ◽  
Rui Juan Hou ◽  
Jie Li ◽  
Jin Niu Tao
Keyword(s):  
Digital Signal Processor ◽  
Pulse Width ◽  
High Speed ◽  
Pulse Width Modulation ◽  
Control Method ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Digital Signal ◽  
Torque Control ◽  
Space Vector

This paper proposed a kind of new control method for resolving the problem of the Direct Torque Control (DTC)'s greater torque pulsation problem at low speed, this method is based on Space Vector Pulse Width Modulation (SVPWM). SVPWM is a kind of excellent Pulse Width Modulation (PWM) scheme. It can not only improve the inverter DC voltage utilization, reduce harmonic losses, restrain torque pulsation, also easily generate high-precision real-time waveform by the high-speed digital signal processor. The simulation results of this system by Matlab/Simulink indicate that the space vector PWM direct torque control can efficiently reduce the pulse of motor torque and flux linkage.

scholarly journals Comparative research of electrical energy transformation processes in locomotive traction drives with asynchronous motors and series-wound brushed DC motors

2021 ◽  
Vol 2131 (4) ◽  
pp. 042079
Author(s):  
A A Zarifyan ◽  
N V Talakhadze
Keyword(s):  
Electric Energy ◽  
Electrical Energy ◽  
Rolling Stock ◽  
Electric Locomotive ◽  
Experimental Data Processing ◽  
Dc Motors ◽  
Traction Motors ◽  
Asynchronous Motors ◽  
Traction Drives ◽  
Transformation Processes

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.

scholarly journals Analysis of Control Methods for the Traction Drive of an Alternating Current Electric Locomotive

Symmetry ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 150
Author(s):  
Sergey Goolak ◽  
Viktor Tkachenko ◽  
Pavol Šťastniak ◽  
Svitlana Sapronova ◽  
Borys Liubarskyi
Keyword(s):  
Vector Control ◽  
Short Circuit ◽  
Asynchronous Motor ◽  
Torque Ripple ◽  
Operating Conditions ◽  
Control Methods ◽  
Electric Locomotive ◽  
Traction Drive ◽  
Operating Modes ◽  
Traction Drives

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.

SVPWM Vector Control Speed Regulation System of Asynchronous Motor Based on DSP

2013 ◽  
Vol 373-375 ◽  
pp. 1294-1298
Author(s):  
Jin Li
Keyword(s):  
Vector Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Low Voltage ◽  
Asynchronous Motor ◽  
Torque Ripple ◽  
Low Noise ◽  
Regulation System ◽  
Motor Speed ◽  
Speed Regulation

Space vector pulse width modulation (SVPWM) is a method to control the AC asynchronous motor. SVPWM technology applied in AC speed regulation system can not only improve the shortcoming of low voltage utilization in the pulse-width modulation (PWM) technology, but have little torque ripple and low noise advantages. In this paper, a SVPWM vector control AC asynchronous motor speed regulation system employing a core TMS320LF2407A-type DSP chip was presented, and simulated the speed regulation system by MATLAB SIMULINK. The obtained simulation results indicate that the proposed speed regulation system has excellent dynamic and static performance, thus SVPWM control technology of asynchronous motor based on DSP has been implemented.

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